JPS62238967A - Operation controller for refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the operation control of a refrigerator, and particularly to a rapid cooling control device.

Conventional technology Conventionally, in refrigerators that have a rapid cooling function and control cooling operation by changing the rotation speed of the compressor of the refrigeration system,
During rapid cooling, the compressor is operated at maximum rotation speed. Also, during normal operation, the rotation speed is the same as during rapid cooling operation, depending on conditions such as internal temperature and outside temperature.

Problems to be Solved by the Invention In such a refrigerator, as the rotation speed increases, the noise emitted from the compressor increases, and there is no problem during rapid cooling, that is, when the user wants to speed up the cooling operation, Regardless of the user's will, during normal operation, the number of rotations reaches the maximum depending on conditions such as the internal temperature and outside temperature, and the noise suddenly increases, causing discomfort to the user.

In addition, during normal operation, there is a possibility that the maximum rotation speed may be maintained for a long period of time, causing problems such as the temperature of the compressor rising, and the amount of electricity consumed by the refrigerator. .

Therefore, the present invention aims to reduce noise during normal operation, suppress the temperature rise of the compressor, and prevent an increase in power consumption of the refrigerator.

Means for Solving the Problem In order to achieve this object, the present invention is designed to operate the compressor at a lower rotation speed than during rapid cooling, rather than at the maximum rotation speed in any case during normal operation. It was designed to do so.

Function: Due to the above-described configuration, the present invention does not set the maximum rotation speed under any circumstances during normal operation.
This eliminates discomfort to the user, suppresses the temperature rise of the compressor, and prevents an increase in power consumption.

Example An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 indicates an internal temperature detection means for detecting the internal temperature, and reference numeral 2 indicates a set temperature detection means for detecting a set temperature. 3 is a quenching switch that sends an ON output when you want to start quenching and an OFF output when you want to end quenching, and 4 detects the amount of frost on the cooler and sends a defrost start signal when it reaches a certain amount. This is a defrosting start detection means that sends out a defrosting start detection means. Reference numeral 6 denotes a defrosting end detection means that detects a temperature rise in the cooler during defrosting and sends out a defrosting end signal. 6 is a control means and input terminal 11. I2. I3. I4. I5. Output terminal 01
It has an input terminal 11. I2. I. , I4.
I6 is each internal temperature detection means 1. Set temperature detection means 2.
Rapid cooling switch 3. Defrosting start detection means 4. It is connected to the defrosting end detection means 6. Further, the output terminal o1 is connected to an operation control means 8 for operating the compressor 7, and the output terminal Q2 is connected to a relay 10 for energizing the heater 9 during defrosting, and the relay 10 has a contact 10'. This control means 6 compares the inputs from the chamber temperature detection means 1 and the set temperature detection means 2, determines the rotation speed of the compressor based on the magnitude of the temperature difference between the two, and outputs the rotation speed of the compressor from the output terminal 01 to the operation control means. Send on 8th. The operation control means 8 operates the compressor 7 at this rotation speed. Furthermore, during rapid cooling, the maximum rotational speed is, in principle, outputted to the operation control means 8. Reference numeral 11 denotes a quenching timer which operates during quenching and defines the quenching time.

Next, the operation will be explained with reference to FIGS. 2 and 3.

FIG. 2 is a functional block diagram of the control means 60.

12 is an input terminal 11. This is a temperature difference detection means that detects the difference between the internal temperature from I2 and the set temperature. Reference numeral 13 denotes a normal rotation speed determining means for determining the rotation speed based on the output from the temperature difference detection means 12. Reference numeral 14 denotes a quenching rotation speed determining means that determines the rotation speed during quenching based on the start and end signals from the quenching switch 3 from the input terminal X3. The rapid cooling rotation speed determination means 14 determines the maximum rotation speed if the signal from the rapid cooling switch 3 is a start signal, and determines 0 rotation if it is an end signal. In addition, the rapid cooling timer 1
1 starts operation if the input from the rapid cooling switch 3 is a start signal, performs a timer operation for a certain period of time, and sends an output to the rapid cooling rotation speed determining means 14 after a certain period of time has elapsed. This express cold rotation speed determination means 14 determines 0 rotation.

15 determines the start of defrosting according to the defrosting start signal from the input terminal +1°, determines the end of defrosting according to the defrosting end signal from the input terminal I5, and sends the determined signals to the defrosting output means 16. Send to. The defrost output means 16 is the defrost control means 1
The signal S is outputted from the output terminal o2, and the relay is turned 0N10FF.

Reference numeral 17 denotes a rotation speed output means, which corresponds to the normal rotation speed determination means 1.
3. Rapid freezing operation control means 14. Select one of the outputs depending on the output of the defrosting control means 16 and connect the output terminal Q.
Output from 1. At this time, the normal rotation speed determining means 13 has a table of rotation speeds determined by temperature differences. For example.

First, the rotational speed output means 17 outputs a rotational speed command determined by the normal rotational speed driving means 13 to the output terminal 01 during normal operation. In addition, during rapid cooling, the rotation speed determined by the rapid cooling rotation speed determination means 14 is given priority and a maximum rotation speed command is sent to the output terminal 01.
Output. Also, during defrosting, the rotation speed command determined by the defrosting control means 16 is outputted to the terminal Q1.
It outputs more.

Next, the operation will be explained using the flowchart shown in FIG.

First, the operation during rapid cooling will be explained. In Figure 3,
In the first step, the output of the quenching switch 3 is inputted to the input terminal +1°, and it is determined whether the inputted output of the quenching switch 3 is ON or OFF. If the quenching switch 3 is ON, the process proceeds to step 2 and the quenching timer 1 is activated.
Turn on 1.

Next, proceed to step 3 to determine whether the quenching timer 11 has reached the set time, and if it has not reached the set time, proceed to step 6; if the set time has come, clear the quench timer 11 in step 4 and end the quenching. Then proceed to step 7. In the completion step, the output of the defrosting start detection means 4 is connected to the input terminal +1.
Enter ゜ and if defrosting has not started, return to step 1. When the start of defrosting is detected, the defrosting control means 15 decides to start defrosting.

Next, since defrosting was detected, the rotation speed output means 17 outputs a rotation speed of 0 from the output terminal 01 to the operation control means 8 at step 8, and at step 0FFL9 of the compressor 7, the defrost output means 16 Output terminal 0
2, the relay 10 is turned on, and the heater 9 is energized to start defrosting. Next, in step 10, the output of the defrosting end detection means 5 is set to the input terminal +1. Input from
It is determined whether the defrosting has been completed, and if the defrosting has not been completed, the output of the defrosting completion detecting means 5 is connected to the input terminal +1. Enter more information. If defrosting has been completed, in step 11, the defrosting control means 16 determines the end of defrosting, and turns the output terminal 02 OFF L, the relay 10 0FFL, and the heater 9
The energization is stopped and the process returns to step 1.

However, if the quenching timer 11 is not at the set time in the 3rd step, the process proceeds to the 6th step, where the quenching speed determining means 14 determines the maximum rotational speed, and in the 6th step, the rotational speed output means 17 outputs the rotational speed to the operation control means 8. Sends the maximum rotation speed command and returns to step 1.

Next, the normal state (state not during rapid cooling) will be explained.

In the normal state, the quenching switch is OFF in one step.
I, proceed to step 12 and set the quench timer 1.
Clear 1 and turn OFF. This operation is the same even if the rapid cooling switch 3 is turned off during rapid cooling.

In step 13, the temperature inside the refrigerator detected by the temperature inside the refrigerator 1 is inputted from the input terminal 11.

Next, in 14 steps, the set temperature detected by the set temperature detection means 2 is set at the input terminal +1. Enter more information.

Next, in step 15, the temperature difference detection means 12
The internal temperature input in step 14 is compared with the set temperature input in step 14, and a temperature difference is detected.

Next, in step 15, the normal rotation speed determining means 1
3 determines the rotation speed based on the temperature difference detected in 14 steps. This normal rotation speed determination means 13 has a rotation speed lower than the maximum rotation determined during rapid cooling. Next, in step 16, the rotation speed output means 17 outputs the output terminal 01.
It is output to the operation control means 8. At this time, the operation control means 8 operates the compressor 7 at the determined rotation speed.

The process then proceeds to step 7, and similarly to the operation during rapid cooling, the operation is performed in the order of step 8 → step 9 → step 10 → step 11 → step 1.

Therefore, in any case during normal operation (other than during rapid cooling), the compressor can rotate at a lower rotation speed than the maximum rotation speed during rapid cooling, and the noise during normal operation is low. temperature can be reduced. Furthermore, it is possible to prevent an increase in the power consumption of the refrigerator. In addition, rapid cooling operation can be performed according to the user's will.

Effects of the Invention As is clear from the above explanation, during refrigerator operation, the compressor is operated at the maximum rotation speed during rapid cooling, and during normal operation, the compressor is operated at a rotation speed lower than the maximum rotation speed during rapid cooling. Therefore, regardless of the user's intention, the noise does not suddenly increase depending on conditions such as the internal temperature and outside temperature, and does not cause discomfort to the user. Moreover, it is possible to suppress the temperature rise of the compressor and prevent an increase in the power consumption of the refrigerator.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a refrigerator operation control device according to an embodiment of the present invention, FIG. 2 is a functional block diagram showing the functions of the control means in FIG. 1, and FIG. 3 is a flowchart of the control device. 1...Inner temperature detection, 2...Setting temperature detection means, 3...Quick cooling switch, 6...
- Control means, 8... Operation control means, 9...
...Compressor, 11...Quick cooling timer. Name of agent: Patent attorney Toshio Nakao and 1 other person --- Naki'-N1'' Deaf Ka@ ---N Kuha

Claims (2)

[Claims] (1) A temperature detection means for detecting the temperature inside the refrigerator, a set temperature detection means for detecting the set temperature for the temperature inside the refrigerator, and a signal to start rapid cooling to lower the temperature inside the refrigerator than in normal operation. A rapid cooling switch, a control means that determines the rotation speed of the compressor based on inputs from the internal temperature detection means, the set temperature detection means, and the rapid cooling switch, and sends out the rotation speed, a rapid cooling timer that operates during rapid cooling, and the control means. an operation control means for operating the compressor at a rotational speed of a specified number of rotations; Device. (2) The refrigerator operation control device according to claim 1, wherein the quenching operation is started in response to a signal from a quenching switch.