JPS62238973A - 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 an operation control device for a refrigerator, and in particular to an abnormality display for a refrigerator whose cooling capacity is varied by changing the rotation speed of a compressor. 2. Description of the Related Art In recent years, various refrigerators have been proposed that include a rotation speed control means and change the rotation speed of a compressor to vary the cooling capacity. In such a refrigerator, when an abnormality occurs in the rotation speed control means, the following control is performed. First of all, if the protection means of the rotation speed control means operates even once, it will be considered abnormal and all functions will stop, and secondly, even if the rotation speed control means operates once, it will continue to operate one after another at regular intervals. It is something to do. Further, as a means of notifying the user of an abnormality, a separate abnormality display (LED, buzzer, etc.) has been used to notify the user.

Problems to be Solved by the Invention However, the above method has the following problems. In the first method, even a simple malfunction is determined to be abnormal, and in the second method, the user does not know that there is an abnormality. Further, regarding the abnormality display, since a separate abnormality display means is provided, the circuit has the disadvantage of being complicated.

In view of the above-mentioned problems, the present invention provides a method for operating a refrigerator that can more reliably detect an abnormality in the rotation speed control means and notify the user of the abnormality without preparing a special abnormality display circuit. A control device is provided.

Means for Solving the Problems In order to solve the above problems, the refrigerator operation control device of the present invention includes: a display means for displaying the state inside the refrigerator; a timer that operates for a certain period of time after the compressor starts operating; The present invention is equipped with a counter that counts the number of times the protection means operates and is cleared when the timer reaches a predetermined time. If this occurs, the number of times the operation occurs is counted with a counter. In addition, the timer operates for a certain period of time after the compressor starts operating, and if a protection signal is generated while the timer is operating, the counter value is further incremented.If the protection signal is not generated while the timer is operating, there is no abnormality in the rotation speed control means. Clear the counter as a. When the value of this counter reaches a set value, it is assumed that there is an abnormality such as a breakdown, and the user is notified of the abnormality using a display means that displays the condition inside the refrigerator.

Embodiment Hereinafter, a refrigerator operation control device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a refrigerator operation control device according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an internal temperature detection means for detecting and transmitting the internal temperature of the refrigerator. Reference numeral 2 denotes a set temperature detection means that detects and sends out what temperature the inside temperature of the refrigerator is set to. 3 is the control means and the input end is +1°.

1. Internal temperature detection means. It is connected to the set temperature detection means 2. Also, output terminal 0°01 and input terminal +1. have. The output terminal 0° outputs the rotational speed at which the compressor 4 operates to the rotational speed control means 6. Also, 01 is a display means 6 that lights up when the temperature inside the refrigerator is rising.
Outputs a signal to. Also engineering. detects an abnormality in the rotational speed control means 5 and inputs a signal from the protection means 7 to be sent.

A timer 8 operates for a certain period of time after the compressor 4 starts operating. A counter 9 counts the number of times the protection means operates, and when the timer 8 reaches a predetermined time, the count is cleared.

The operation of the refrigerator operation control device configured as described above will be explained below with reference to FIGS. 1 and 2. FIG. 2 is a flowchart showing the operation of the block diagram shown in FIG.

In step (1), the output of the internal temperature detection means 1 is inputted from the input terminal +1° of the control means 3. Next, in step (2), it is determined whether the input taken in step (1) indicates that the temperature inside the refrigerator is in a rising state, and if it is in a rising state, the display means 4 as in step (3) If the temperature is not rising, the display means 4 is turned off as in step (4). Next, in step (5), the output of the set temperature detection means 2 is inputted to the input terminal 11 of the control means 3. Next, in step (6), the internal temperature input in step (1) and step (5) is compared with the set temperature, and ('7
), the comparison and determined rotational speed is outputted from the output terminal 0° of the control means 3. The compressor 4 is then operated at the rotation speed determined by the rotation speed control means 6. For example, the control means 3 controls the number of revolutions = 5400 revolutions when the temperature inside the refrigerator is greater than the set temperature, the number of revolutions = 3600 revolutions when the temperature inside the refrigerator equals the set temperature, and the number of revolutions = 0 when the temperature inside the refrigerator is less than the set temperature. The compressor outputs rotation, and the compressor is turned on when the rotation speed is other than 0 rotations. Next, in step (8) it is determined whether the compressor 4 is ON or not, and if it is not ON, the timer 8 is cleared in step (9) and the process returns to step 1), and if it is ON, it is determined (10).
Proceed to step 8 and start timer 8. Next, in step (11), it is determined whether the timer 8 has reached the set time,
If it is the set time, proceed to step (12) and clear the value of the counter 9, and if it is not the set time, do not execute step (12) and proceed to the next step. Next, in step (13), protection measure 7
If there is no protection signal, return to step (1), and if there is a protection signal (14
) In step ), the operation of the compressor 4 is set to oFF, that is, the number of rotations is set to 0 rotations. Next, in step (16), the value of the counter 9 is increased by 1 (count up). Next, in step (16), it is determined whether the color/color value is the set value, and if it is not the set value, it is waited for a certain period of time in step (17), and returns to step (1), and if it is the set value, (18) Turn off all outputs (for example, fan motor, heater, etc. (not shown)). Next (1
9) Make the display means 6 blink in step.

As described above, according to this embodiment, the timer 8 operates for a certain period of time after the compressor 4 starts operating, and the counter 9 counts the number of operations of the protection means 7 and is cleared when the timer 8 reaches a predetermined time. By providing this, when the protection means 7 operates within a certain period of time after the compressor 4 is turned on, it is determined that the rotation speed control means 5 is abnormal, the number of times is counted by the counter 9, and this count value is When the set value is reached, it is assumed that the rotation speed control means 5 is malfunctioning, and all outputs are turned off. Normally, the display means indicating the temperature rise in the refrigerator is blinked to indicate that the rotation speed control means 6 is malfunctioning. person can be informed. Therefore, errors in failure judgment due to malfunctions, etc. are eliminated, and it is possible to determine that there is a complete failure.Furthermore, the failure can be notified by using a display means prepared in advance to display the temperature rise in the refrigerator. This eliminates the need for a circuit, which simplifies the circuit and reduces costs.

In the embodiment, the display means 6 displays a temperature increase, but it may also display a suitable temperature display indicating that the temperature inside the refrigerator is at a suitable temperature.

Effects of the Invention As described above, the present invention includes a display means for displaying the condition inside the refrigerator, a timer that operates for a certain period of time after the compressor starts operating, and a timer that counts the number of times the protection means is operated and that the timer operates at a predetermined time. By providing a counter that clears the count when the count is reached, abnormalities in the rotation speed control means can be detected more reliably, and since there is no need for an abnormality display means that requires a special abnormality display circuit, the circuit becomes simpler and costs are further reduced. You can measure down.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a refrigerator operation control device according to an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation of FIG. 1. 1... Inner temperature detection means, 2... Preset temperature detection means, 3... Control means, 6...
- Rotation speed control means, 6...Display means, 7...
...Protective measures, 8...Timer, 8...
·counter. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
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Claims (1)

[Claims] An internal temperature detection means for detecting the internal temperature of the refrigerator, a set temperature detection means for detecting the set temperature, a rotation speed control means for operating the compressor at a desired rotation speed, and detecting an abnormality in the rotation speed control means. a display means for displaying the condition inside the refrigerator; a timer that operates for a certain period of time after the compressor starts operating; and a timer that counts the number of times the protection means operates and when the timer reaches a predetermined time, the count is cleared. and a control means for outputting a signal determining the rotation speed at which the compressor operates to the rotation speed control means based on the outputs of the internal temperature detection means and the set temperature detection means, In this case, the refrigerator operation control device is configured to notify the user of an abnormality using the display means.