JPH0571858A - Refrigerator - Google Patents

Abstract

PURPOSE:To return to an initial state at the time of energizing a power source if an erroneous operation occurs due to noise, etc. CONSTITUTION:A control circuit 15 counts a time while a compressor 9 is operating when the temperature of a freezing chamber is lower than a predetermined value in response to an input from freezing chamber temperature sensing means 8 and an output of the compressor 9 to driving means 14 except at the time of quick cooling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to operation control in a refrigerator.

[0002]

2. Description of the Related Art In recent years, models using a microcomputer have become the mainstream for operation control of refrigerators.

Conventionally, this kind of operation control is NR-D35A which was released by Matsushita Electric Industrial Co., Ltd. in April 1987.
The structure shown in FIG. The configuration will be described below with reference to FIGS. 4 to 6.

Reference numeral 1 denotes a refrigerator main body, which is a forced ventilation system in which air cooled by a cooler 4 housed in a cooling chamber 3 formed in a partition wall 2 is blown by a blower 5 into a freezing chamber 6 and a refrigerating basin 7. It's a refrigerator. Reference numeral 8 is a freezing room temperature detecting means such as a thermistor for detecting the temperature of the freezing room 6, and outputs an operation signal for operating the compressor 9 of the refrigerator.

Next, the control circuit will be described. Reference numeral 10 is a control means including a microcomputer, which is composed of a rapid cooling timer 11 and a RAM 12, and its input terminal is connected to a freezing room temperature detecting means and a rapid cooling starting means 13. Driving means 14 for moving the compressor 9 is connected to the output terminal.

The operation of the above configuration will be described with reference to FIG. When the power is turned on, the RAM is set as step 1
Clear all 12 data and perform initialization. Next, in step 2, the state of the freezer compartment temperature detection means 8 and the state of the rapid cooling start means 13 are stored in the RAM 12.
Then, in step 3, it is determined whether or not the rapid cooling start means 13 is set from the RAM 12, and if not set, it is determined in step 4 whether or not the freezing compartment temperature detection means 13 has detected the set temperature or higher from the RAM 12. To judge.

At this time, if the temperature is equal to or higher than the set temperature, the state of the compressor 9 is stored in the RAM 12 as step 5 in step 5. Then, in step 6, the state of the compressor 9 is output, but since it is ON here, the compressor 9 is operated through the drive means 14. When the freezing room 6 becomes below the set temperature by repeating the steps 2 to 6, the freezing room temperature detecting means 8 of the freezing room 6 detects it in step 2 and stores it in the RAM 12.

Then, in step 4, it is judged from the RAM 12 that the freezer compartment temperature detecting means 8 has detected the temperature equal to or lower than the set temperature, and in step 7, the RAM 12 stores that the state of the compressor 9 is OFF. And step 6
Then, the state of the compressor 9 is output, but since it is OFF here, the compressor 9 is stopped through the drive means 14.

If the rapid cooling start means is set in step 3, the state of the compressor 9 is set to 0 in the RAM 12 in step 8.
It stores N, and outputs that the state of the compressor 9 is ON in step 9. Then, the quenching timer 11 is counted in step 10, and if the counting of the quenching timer 11 is not completed in step 11, the process returns to step 8, and if it is completed, the process returns to step 4. Hereinafter, such a cooling operation is repeated.

[0010]

However, if the data in the RAM 12 becomes abnormal due to noise or the like during such a cooling operation or if the operation is completely different from the normal operation, for example, it is set in step 4. The RAM 12 collapses in step 7 even if the temperature is lower than the temperature.
When the F state is not set, or step 4 does not proceed to step 7 but proceeds to step 5 and the compressor 9 is turned on.
When the state is set, the state is repeated and the compressor 9
That is, the temperature of the cooler 4 becomes extremely low (especially when the outside air temperature is low), the heat is transmitted through the partition wall 2, and the temperature of the refrigerating compartment 7 becomes zero degrees or less, so that the chilled food is frozen and damaged. There was a problem.

The present invention solves the above-mentioned problems, and an object of the present invention is to eliminate the adverse effect on the refrigerated food due to the abnormal operation of the control circuit due to noise or the like.

[0012]

In order to solve the above-mentioned problem, the refrigerator according to the present invention has a compressor operating when the temperature of the freezer is lower than a predetermined temperature for instructing the operation of the compressor except during the rapid cooling operation. The operation timer is operated while the power is on, and the power is turned on after a predetermined time has been accumulated.

[0013]

According to the present invention, when the supercooled state is caused by the abnormal operation, the power supply is turned on to perform the correct cooling operation again, so that the adverse effects such as damage due to freezing of the chilled food can be prevented. it can.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same components as those of the conventional one are designated by the same reference numerals, detailed description thereof will be omitted, and only different portions will be described.

In the figure, an operation timer 16 is added to the control means 15. The operation timer 16 counts, for a certain period of time, a state in which the freezer compartment temperature detecting means 8 is at a predetermined temperature or less and the compressor 9 is continuously operating except during the rapid cooling operation.

The operation of this structure will be described with reference to FIG. Since steps 1 to 11 are the same as the conventional example, description thereof will be omitted. When the temperature in the freezer compartment 6 is high in step 12, the process proceeds to step 14. In step 14, the timer of the operation timer 16 is cleared, the process goes to step 2, and thereafter this operation is repeated.

However, during such a cooling operation, data in the RAM 12 becomes abnormal due to noise or the like, and, for example, the memory state of the compressor 9 is turned on even though the freezer compartment temperature detecting means 8 is below the set temperature. Will be described, and the case where the compressor 9 continues to operate will be described.

In this case, the process proceeds to step 12 and step 13
Then, it is determined that the memory state of the compressor 9 is set to ON, and the process proceeds to step 15. In step 15, the operation timer 16 is operated, and in step 16, it is determined whether the integrated time has been reached. If the integration is being performed in step 16, the process returns to step 2 and this operation is repeated. Step 1
When the integration is completed in step 6, go to step 1 and RAM
All the data of 12 are cleared, the normal data is input from step 2, and the normal cooling operation is performed again.

Therefore, when the data in the RAM 12 becomes abnormal due to noise or the like and the freezer compartment 6 is sufficiently cooled but the compressor 9 continues to operate, the frozen food is frozen by turning on the power. However, it can be prevented from being damaged.

[0020]

As described above, according to the refrigerator of the present invention,
Except during the rapid cooling operation, the freezer compartment temperature detecting means determines that the temperature is lower than a predetermined temperature, equipped with an operation timer that operates when the compressor is operating, and when the operation timer integrates for a predetermined time,
Since the refrigerator is turned on, it is possible to prevent the compressor from continuously operating and freezing and damaging the refrigerated food due to malfunction due to noise or the like.

Further, since the user does not need to notice the malfunction state and to disconnect the power source by himself, a great effect can be obtained.

[Brief description of drawings]

FIG. 1 is a flow chart of a refrigerator showing an embodiment of the present invention.

FIG. 2 is a control circuit diagram of the refrigerator.

FIG. 3 is a sectional view of the refrigerator.

FIG. 4 is a flowchart of a refrigerator showing a conventional example.

FIG. 5 is a control circuit diagram of the refrigerator.

FIG. 6 is a sectional view of the refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 6 Freezer compartment 8 Freezer compartment temperature detection means 9 Compressor 16 Operation timer

Claims (1)

[Claims] 1. A freezer compartment, a compressor, a freezer compartment temperature detecting means for detecting the temperature of the freezer compartment to stop the operation of the compressor in the refrigeration cycle, and a quenching means for forcibly operating the compressor for a predetermined time. And when the quenching means is not working,
A means for operating the compressor when the freezer compartment temperature is lower than a predetermined temperature and operating when the compressor is operating. When the operation timer counts for a predetermined time, it is determined to be abnormal and an initial state upon power-on is set. Refrigerator equipped with.