JPH05264154A - Refrigerator - Google Patents

Abstract

PURPOSE:To previously inspect and detect the occurrence of especially defective initial cooling when defective cooling of a main cooler and the defective component of a compressor and a blower occur during cooling operation starting from turning-ON of a power source. CONSTITUTION:A temperature detector 8 and a temperature set switch 12 are inputted to a microcomputer 22 comprising a CPU 15, an RAM 16, an ROM 17, and a timer 21. A control circuit 20 connected to the output of the microcomputer is composed of a drive circuit 18 to run a compressor 9 and a blower 5, and a drive circuit 19 to operate a temperature set display device 11.

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 Conventionally, operation control after installing a refrigerator in a general household is as follows, and its configuration will be described with reference to FIGS.

The control circuit will be described with reference to FIG.
Reference numeral 13 is a control circuit, which is a CP in the microcomputer 14.
It is formed of U15, RAM 16, ROM 17 and the like, and the ROM 17 stores a program for determining the next operation depending on the order of confirmation of the operation and the state at that time. Further, the temperature detector 8 and the temperature setting switch 1
2 is input to the control circuit 13. The output of the control circuit 13 is supplied to the drive circuit 18 which operates the compressor 9 and the blower 5, and the temperature setting display device 1
1 are respectively connected to the drive circuits 19 that operate.

The operation of this configuration will be described with reference to FIG. When the power is turned on, R is set as step 1.
All data in AM16 are cleared and initialization is performed. Next, in step 2, the states of the temperature detector 8 and the temperature setting switch 12 are read. The signal is output to 19. Next, in step 4, when the temperature of the freezer compartment 6 is higher than the set value, a signal is output to the drive circuit 18 to operate the compressor 9 and the blower 5 in step 5, and the process returns to step 2. When the temperature of the freezer compartment 6 becomes lower than the set value, the process proceeds from step 4 to step 6 to shut off the signal from the drive circuit 18 to stop the compressor 9 and the blower 5. Hereinafter, such a cooling operation is repeated.

In FIG. 6, reference numeral 1 denotes a refrigerator main body, in which air cooled by a main cooler 4 housed in a cooling chamber 3 formed in a partition wall 2 is circulated to a freezing chamber 6 and a refrigerating chamber 7 by a blower 5. It is a forced draft refrigerator. 8 is a freezer 6 in the refrigerator
A temperature detector such as a thermistor that detects the temperature of the device outputs an operation signal for operating the compressor 9 of the refrigerator. Cold room 7
A damper thermostat 10 for adjusting the inflow amount of cold air is provided at the inlet of the. Reference numeral 11 denotes a temperature setting display device, which can change the set temperature of the temperature detector 8 by the temperature setting switch 12 (for example, strong, medium, and weak) and also indicates the setting state (for example, strong, medium, and weak) of the temperature setting switch 12 Etc. are displayed.

[0006]

However, when a cooling failure of the main cooler 4 or defective parts of the compressor 9 and the blower 5 occurs during the cooling operation after the power is turned on,
There is a problem in that the freezer compartment 6 and the refrigerating compartment 7 cannot be cooled to a predetermined temperature and adversely affect the food in the refrigerator.

The present invention is intended to solve the above-mentioned problems, and in particular, it is an object of the invention to be able to inspect and extract an initial cooling failure in advance.

[0008]

In order to solve the above-mentioned problems, the refrigerator according to the present invention displays a warning on the temperature setting display device unless the internal temperature of the refrigerator reaches the predetermined temperature after the power is turned on and the timer has passed the predetermined time. It is configured to do.

[0009]

According to the present invention, when the cooling failure of the main cooler or the defective parts of the compressor and the blower occurs at the initial stage, the temperature setting display device gives a warning display to prevent food from being stored in the refrigerator due to the cooling failure. It is possible to prevent adverse effects.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, a timer 21 that integrates for a predetermined time (for example, 1 hour) after power is turned on is additionally provided in FIG. 1 in the control circuit 20, and the same reference numerals are given to the other configurations that are the same as the conventional ones, and detailed description thereof is given. Will be omitted and only different operations will be described.

The operation of this structure will be described with reference to FIG. When the power is turned on, R is set as step 1.
All data in AM16 is cleared and initialization is performed. Next, in step 2, the states of the temperature detector 8 and the temperature setting switch 12 are read. Next, in step 3, the integrated state of the timer 21 is checked. If it is less than 1 hour, the process proceeds to step 4 to count up the timer 4. And
In step 5, for example, if the temperature setting switch 12 is in the middle state, a signal is output to the drive circuit 19 to display the middle setting lamp of the temperature setting display device 11. Next, in Step 6, if the temperature of the freezer compartment 6 is higher than the set value, Step 7
Then, a signal is output to the drive circuit 18 to operate the compressor 9 and the blower 5, and the process returns to step 2. If the temperature of the freezer compartment 6 becomes lower than the set value, the process proceeds from step 6 to step 8 to drive the drive circuit 1 to stop the compressor 9 and the blower 5.
The signal of 8 is cut off. Hereinafter, such a cooling operation is repeated.

After such a cooling operation continues and the power is turned on, 1
After the lapse of time, the process proceeds from step 3 to step 9, and if the temperature detector 8 is below a predetermined temperature (for example, 0 ° C.), it is judged that there is no problem in the cooling performance of this refrigerator, and normal cooling operation is continued thereafter. If the temperature detector 8 is equal to or higher than a predetermined temperature (for example, 10 ° C.) in step 9, it is determined that the components of the compressor 9 and the blower 5 of the refrigerator are defective, or the cooling of the main cooler is defective, and the temperature is determined in step 10. If the setting of the setting display device 11 is medium, the medium setting lamp is output to the drive circuit 19 so as to display a blink for warning. With this alarm, the user can quickly find a defect in the refrigerator after the power is turned on and prevent the food in the refrigerator from being damaged.

[0013]

As is apparent from the above embodiments, according to the present invention, a temperature detector for detecting the temperature inside the refrigerator and stopping the operation of the compressor and the blower, and a temperature setting for displaying the setting state of the temperature inside the refrigerator. A display device and a timer that integrates for a predetermined time after power-on are provided, and a control circuit that alarms the temperature setting display device by blinking or the like if the timer integrates for a predetermined time or more and the temperature detector is above a predetermined temperature Therefore, the cooling failure of the main cooler and the defective parts of the compressor and the blower can occur in the initial stage, and it is possible to prevent adverse effects on the food in the refrigerator due to the cooling failure.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of the refrigerator showing an embodiment of the present invention.

[Fig. 2] Flow chart of the refrigerator

FIG. 3 is a sectional view of the refrigerator.

FIG. 4 is a control circuit diagram of a refrigerator showing a conventional example.

FIG. 5: Flow chart of the refrigerator

FIG. 6 is a sectional view of the refrigerator.

[Explanation of symbols]

 5 Blower 8 Temperature detector 9 Compressor 11 Temperature setting display device 12 Temperature setting switch 20 Control circuit 21 Timer

Claims (1)

[Claims] 1. A temperature detector for detecting the temperature inside the refrigerator to stop the operation of the compressor and the blower, a temperature setting display device for displaying the setting state of the temperature inside the refrigerator, and a timer for accumulating for a predetermined time after the power is turned on. A refrigerator provided with a control circuit for giving an alarm such as blinking of the temperature setting display device when the timer integrates for a predetermined time or more and the temperature detector is a predetermined temperature or more.