JPH0650213B2 - Operation control device for refrigerator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to operation control of a refrigerator, and more particularly to a quenching control device.

2. Description of the Related Art In recent years, refrigerators have been proposed in which the number of revolutions of a compressor is changed to control the temperature inside the refrigerator, and the number of revolutions of the compressor is increased during rapid cooling to further cool the inside of the refrigerator by a quench switch.

An example of the above-described refrigerator control device will be described below with reference to the drawings.

In FIG. 3, reference numeral 1 is an inside temperature detecting means for detecting a freezing room temperature, and 2 is a set temperature detecting means for detecting a set temperature. 3 is a quenching switch that sends ON output when you want to start the rapid cooling and OFF output when you want to finish the rapid cooling. 4 is a defrosting start signal when the amount of frost on the cooler is detected and when it becomes a certain amount. Is a defrosting start detecting means for sending out. Reference numeral 5 denotes a defrosting end detecting means that detects a temperature rise of the cooler during defrosting and sends a defrosting end signal. Reference numeral 6 denotes a control means, which are input terminals I ₁ , I ₂ , I ₃ , I ₄ , I ₅ and an output terminal O.
₁ , O ₂ , and input terminals I ₁ , I ₂ , I ₃ ,
I ₄ and I ₅ are respectively connected to the inside temperature detecting means 1, the set temperature detecting means 2, the rapid cooling switch 3, the defrosting start detecting means 4, and the defrosting end detecting means 5. The output terminal O ₁ is connected to the operation control means 8 for operating the compressor 7, and the O ₂ is connected to the relay 10 for energizing the heater 9 during defrosting. The relay 10 has a contact 10 ′. The control means 6 compares the inputs from the first internal temperature detection means 1 and the set temperature detection means 2, determines the rotation speed of the compressor 7 according to the difference in temperature between the two, and outputs the output terminal O ₁ from the output terminal O _1. It is sent to the operation control means 8. The operation control means 8 operates the compressor 7 at this rotation speed. In addition, during the rapid cooling, in principle, the maximum rotation speed is output to the operation control means 8. A quenching timer 11 operates during quenching and regulates the quenching time.

The operation of the operation control device for the refrigerator configured as described above will be described below with reference to FIG. FIG. 4 is a flowchart showing the operation of a conventional refrigerator operation control device.

First, the operation during quenching will be described. In FIG.
The first step is to output the output of the quenching switch 3 to the input terminal I ₃
To determine whether the input output of the quenching switch 3 is ON or OFF. If the rapid cooling switch 3 is ON, the process proceeds to step 2 and outputs from the output terminal O ₁ to the operation control means 8 that the rotation speed of the compressor 7 is the maximum rotation speed. At this time, the operation control means 8 operates the compressor 7 at the maximum rotation speed.

Then, in 3 steps, the quench timer 11 is operated to 4
In step, it is judged whether the rapid cooling timer 11 is at the set time, and if it is not the set time, the process returns to step 1. If the set time is reached, the rapid cooling timer 11 is cleared in 5 steps, the rapid cooling is terminated, and the process proceeds to 6 steps. In the 6th step, the output of the defrosting start detecting means 4 is input from the input terminal I ₄ , and if the defrosting has not started, the step returns to the 1st step. If the defrosting start is detected, the process proceeds to step 7 and the output terminal O ₁
Output the number of revolutions O to the operation control means 8, turn off the compressor 7, and in step 8 output terminal O
_{2, the} relay 10 is turned on, the heater 9 is energized, and defrosting is started. Next, in step 9, the output of the defrosting completion detecting means 5 is input from the input terminal I ₅ to determine whether the defrosting has ended. If the defrosting has not ended, the defrosting completion detecting means 5 again. Input from the input terminal I ₅ . If the defrosting is completed, the output terminal O ₂ is turned off in 10 steps, the relay 10 is turned off, the energization of the heater 9 is stopped, and the procedure returns to step 1. The above is the operation during the rapid cooling. Next, the normal state (state not during rapid cooling) will be described. In the normal state, since the rapid cooling switch is turned off in step 1, the process proceeds to step 11 and the rapid cooling timer 11 is cleared and turned off. This is the same operation even if the rapid cooling switch 3 is turned off during rapid cooling. In the 12th step, the freezing room temperature detected by the inside temperature detecting means 1 is input from the input terminal I ₁ . Next, in step 13, the set temperature detected by the set temperature detecting means 2 is input from the input terminal I ₂ . Next, in 14 steps, the internal temperature input in 12 steps is compared with the set temperature input in 13 steps to determine the rotation speed of the compressor 7, and output to the operation control means 8 from the output terminal O ₁ . At this time, the operation control means 8 operates the compressor 7 at the determined rotation speed. Then, the operation proceeds to 6 steps, and the operation is performed in the same manner as the operation at the time of quenching: 7 step → 8 step → 9 step → 10 step → 1 step.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the configuration as described above, if there is a signal from the quenching switch 3, the compressor 7 is at the maximum rotation speed and the quenching timer 11 does not depend on the temperature in the freezing chamber.
Will continue to operate until the set time. Further, since the compressor 7 is operated at the maximum rotation speed during rapid cooling, the refrigerating room is also provided with a damper thermostat for adjusting the amount of cold air to the refrigerating room and a sealing property between the freezing room and the refrigerating room. The temperature was below 0 ° C. in a short time, and there was a drawback that the stored food such as freezing of the stored food adversely affected the stored food.

In view of the above problems, the present invention provides an operation control device for a refrigerator that prevents the temperature inside the refrigerating chamber from becoming 0 ° C or lower and prevents freezing of stored food.

Means for Solving the Problems In order to solve the above problems, the control device for a refrigerator according to the present invention has a configuration in which the second in-compartment temperature detecting means for detecting the temperature in the second room is provided, so that the maximum temperature at the time of rapid cooling is achieved. If the detected temperature of the internal temperature detection means 2 becomes equal to or lower than the set temperature while the compressor is operating at the rotational speed, the compressor is operated at the rotational speed determined by the input of the first internal temperature detection means and the set temperature detection means. When the temperature detected by the second internal temperature detecting means exceeds the set temperature again, the compressor is operated again at the maximum rotation speed during rapid cooling.

In order to solve the above-mentioned problems, the control device for the refrigerator of the present invention operates the compressor at the maximum rotation speed during the rapid cooling by the structure provided with the second inside temperature detecting means for detecting the temperature inside the second room. If the detected temperature of the second internal temperature detecting means becomes equal to or lower than the set temperature while the compressor is operating, the compressor is operated at a rotation speed determined by the inputs of the first internal temperature detecting means and the set temperature detecting means, and the cooling capacity is increased. If the detected temperature of the second inside temperature detecting means exceeds the set temperature again, the compressor is operated at the maximum rotation speed during the rapid cooling again. Therefore, the inside temperature of the refrigerating room is set to the second inside temperature. It is possible to prevent the temperature of the refrigerating room from lowering to 0 ° C. or less by detecting with the second in-compartment temperature detecting means for detecting the temperature of the refrigerator and preventing the freezing of the preserved food, thereby preventing the freezing of the stored food. Adversely affects stored food I will not lose it.

Embodiment An operation control apparatus for a refrigerator according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an operation control device for a refrigerator according to an embodiment of the present invention.

In FIG. 1, the inside temperature detecting means 1 (corresponding to the first inside temperature detecting means for detecting the temperature of the first chamber), the set temperature detecting means 2, the rapid cooling switch 3, the defrosting start detecting means 4, the defrosting Since the end detection means 5, the compressor 7, the operation control means 8, the heater 9 and the relay 10 are the same as those in the conventional example, the description thereof will be omitted. Reference numeral 12 is a second inside temperature detecting means for detecting the inside temperature of the refrigerator compartment. Reference numeral 13 is a control means, which has input terminals I ₁ , I ₂ , I ₃ , I ₄ , I ₅ , I ₆ and has a first in-chamber temperature detecting means 1, a set temperature detecting means 2, respectively.
It is connected to the rapid cooling switch 3, the defrosting start detection means 4, the defrosting end detection means 5, and the second inside temperature detection means 12. It also has output terminals O ₁ and O ₂ , which are connected to the operation control means 8 and the relay 10, respectively. The control means 1
2 normally determines the rotational speed of the compressor based on the temperature difference between the first internal temperature detecting means 1 and the set temperature detecting means 2 and sends it to the operation control means 8. Table 1 shows the relationship between the temperature difference and the rotation speed.

Is. When a rapid cooling start signal is input from the rapid cooling switch 3, a maximum rotation speed command, for example, 5400 rpm is sent to the operation control means 8. Also,
When the temperature detected by the second internal temperature detecting means 11 becomes equal to or lower than the set temperature while the compressor 7 is operating at the maximum rotation speed during the rapid cooling, the operation of the compressor 7 at the maximum rotation speed is stopped. The first internal temperature detecting means 1 in Table 1
And the set temperature detection means 2 operates at a rotational speed depending on the temperature difference.

Next, the operation will be described. The present invention is applied only to the rapid cooling mode of the flowchart of the conventional example shown in FIG. 4, and since the other operations are the same, the description thereof will be omitted. FIG. 2 is a flow chart showing the operation in the air cooling mode. In step 15, the temperature detected by the second inside temperature detecting means 12 is input, and then in step 16 it is determined whether the detected temperature is below the set temperature. At this time, the set temperature is such that the refrigerating room does not fall below 0 ° C. If the detected temperature is higher than the set temperature in 16 steps, the process proceeds to 7 steps, and the command of the maximum rotation speed is output from the output terminal O ₁ to the operation control means 8. Next, in step 18, the rapid cooling timer 11 is turned on, and in step 19, it is determined whether the rapid cooling timer 11 has reached the set time. 12 if not set time
Return to the step, repeat the above operation, and if it is the set time, proceed to step 20 to clear the rapid cooling timer 11,
After F, proceed to step 6 to end the rapid cooling.

1 step until the set time of the rapid cooling timer 11 →
The operations of 15 steps → 16 steps → 17 steps → 18 steps → 19 steps are repeated, and the compressor 7 is operated at the maximum rotation speed. At such time, if the temperature detected by the second inside temperature detecting means 12 becomes equal to or lower than the set value,
In 16 steps, it is judged that the temperature is lower than the set temperature, and in 21 step, the freezing room temperature from the inside temperature detecting means 1 is input, and in 22 step, the setting temperature from the set temperature detecting means 2 is input. Next, in step 23, the compressor 7 is operated at the rotation speed shown in Table 1 depending on the temperature difference between the freezer compartment temperature and the set temperature, and the process proceeds from step 18 to step 19. If the detected temperature of the in-compartment temperature detection means 2 (12) becomes equal to or higher than the set temperature again, the process proceeds from 16 steps to 17 steps and the maximum rotation speed is output.

As described above, according to this embodiment, the second inside temperature detecting means 1
If the detected temperature of 2 becomes equal to or lower than the set value, the compressor 7 is operated at a rotation speed determined by the temperature difference due to the input of the first internal temperature detecting means 1 and the set temperature detecting means 2, the cooling capacity is lowered, and the detected temperature If the value exceeds the set value, the compressor is operated at the maximum rotation speed, so that it is possible to prevent the temperature in the refrigerating room from becoming 0 ° C. or lower and to prevent the stored food in the refrigerating room from freezing.

EFFECTS OF THE INVENTION Due to the configuration provided with the second inside temperature detecting means for detecting the temperature inside the second room, the temperature detected by the second inside temperature detecting means when the compressor is operating at the maximum rotation speed during quenching. Is below the set temperature, the compressor is operated at a rotation speed determined by the inputs of the first inside temperature detecting means and the set temperature detecting means, the cooling capacity is reduced, and the second inside temperature detecting means detects again. If the temperature exceeds the set temperature, the compressor is operated at the maximum rotation speed during rapid cooling again, so it is possible to prevent the temperature in the refrigerating room from falling below 0 ° C, and to prevent freezing of stored food and The stored food will not be adversely affected.

[Brief description of drawings]

FIG. 1 is a block diagram of an operation control device for a refrigerator according to an embodiment of the present invention, FIG. 2 is a flow chart of the same control device during rapid cooling, and FIG. 3 is an operation control device for a refrigerator according to an embodiment of a conventional example. A block diagram and FIG. 4 are flowcharts of the same control apparatus of the conventional example. 1 ... In-compartment temperature detecting means, 2 ... Set temperature detecting means, 3
...... Quench switch, 13 ...... Control means, 8 ...... Operation control means, 9 ...... Compressor, 11 ...... Quench timer, 12
...... Internal temperature detection element.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuro Kurakake, 3-22, Takata Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerating Machinery Co., Ltd. (56) References JP-A-61-22171 (JP, A)

Claims (3)

[Claims] 1. A refrigerator having a plurality of compartments, a first compartment temperature detecting means for detecting a temperature of a first compartment, a second compartment temperature detecting means for detecting a temperature of a second compartment, and a first compartment. Temperature detecting means for detecting the set temperature of the room temperature of the room, a rapid cooling switch for sending a signal for starting the rapid cooling for cooling the first room to a temperature lower than the normal operation, and the first internal temperature detection Means, set temperature detecting means, second internal temperature detecting means, and control means for determining and sending the number of revolutions by the input of the quenching switch, a quenching timer that operates during quenching, and the number of revolutions determined by the controlling means. And an operation control means for operating the compressor, the quenching operation is stopped when the temperature detected by the second in-chamber temperature detecting means becomes equal to or lower than a preset value during the rapid cooling, and the first in-chamber temperature detecting means detects the temperature. Temperature and set temperature Detection temperature set temperature The temperature difference, refrigerator operation control device for operating the compressor. 2. The operation control device for a refrigerator according to claim 1, wherein when the temperature detected by the second internal temperature detection means exceeds a set value, the rapid cooling operation is performed again. 3. The refrigerator operation control device according to claim 1, wherein the first chamber is a freezing chamber and the second chamber is a refrigerating chamber.