JPH0633927B2 - Operation control device for refrigerator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator operation control device, and more particularly, to a refrigerator abnormality notification in which the rotation speed of a compressor is changed to make a cooling capacity variable.

2. Description of the Related Art In recent years, various refrigerators having a rotation speed control means and changing the rotation speed of a compressor to change the cooling capacity have been proposed. In such a refrigerator, when an abnormality of the rotation speed control means occurs, the following control is performed. First of all, if the protection means of the rotation speed control means operates even once, all functions are stopped as an abnormality, and secondly, even if the rotation speed control means works once, it tries to operate one after another with a constant interval. To do. In addition, as a means for informing the user of the abnormality, an abnormality display is separately used to inform the user.

Problems to be Solved by the Invention However, the above method has the following problems. The first method determines that there is an abnormality even by a simple malfunction, and the second method does not reveal to the user that there is an abnormality. Further, regarding the abnormal display, it is not known unless the refrigerator is watched, and there is a drawback that it is difficult to notice from a distant place.

In view of the above problems, the present invention provides a refrigerator operation control device capable of more reliably detecting an abnormality in the rotation speed control means and notifying the user of the abnormality.

Means for Solving the Problems In order to solve the above problems, an operation control device for a refrigerator according to the present invention includes a timer that operates for a certain period of time after a compressor starts operating, and a timer that counts the number of times of operation of a protection means. Is provided with a counter which is cleared when a predetermined time has elapsed, and a sounding means which sounds when the count number of the counter reaches a set value.

Operation According to the present invention, when an abnormality occurs in the rotation control means and a protection signal is generated, the counter counts the number of operations of the rotation control means. In addition, the timer that operates for a fixed time after the compressor starts operating increases the counter value when a protection signal is generated during timer operation, and there is no abnormality in the rotation speed control means unless a protection signal is generated during timer operation. Clear the counter as a thing. When the value of this counter reaches a set value, it is considered as an abnormality such as a failure, and the sounding means is used to notify the user of the abnormality.

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, reference numeral 1 is an in-compartment temperature detecting means for detecting and sending out the in-compartment temperature of the refrigerator. Reference numeral 2 is a set temperature detecting means for detecting and sending out how many times the temperature inside the refrigerator is set. Reference numeral 3 is a control means, which has input terminals I ₀ and I ₁ , respectively, and is provided with the inside temperature detection means 1 and
It is connected to the set temperature detecting means 2. Output terminal O
_{It has 0} , O ₁ and an input terminal I ₂ . The output terminal O ₀ outputs the rotation speed of the compressor 4 to the rotation speed control means 5. Further, O ₁ outputs a signal to the sounding means 6. Further, I ₂ detects the abnormality of the rotation speed control means 5 and inputs the signal of the protection means 7 which is sent out. Reference numeral 8 denotes a timer, which operates for a fixed time after the compressor 4 starts operating. A counter 9 counts the number of operations of the protection means 7 and is cleared when the timer 8 reaches a predetermined time. Reference numeral 10 is a volume adjusting means of the sound producing means 6.

The operation of the refrigerator operation controller configured as described above will be described below with reference to FIGS. 1 and 2.

FIG. 2 is a flow chart showing the operation of the block diagram shown in FIG.

In one step, the output of the inside temperature detecting means 1 is input from the input terminal I ₀ of the controlling means 3. Next, in two steps, the output of the set temperature detecting means 2 is input to the input terminal I ₁ of the control means 3. Next, in 1 of 3 steps,
Compare the internal temperature and the set temperature input in 2 steps,
In 4 steps, the rotation speed determined by comparison is output from the output terminal O ₀ of the control means 3. Then, the compressor 4 is operated at the rotation speed determined by the rotation speed control means 5. The control means 3 is, for example, rotation speed = 5400 rotations when the inside temperature> set temperature, rotation speed = 3600 rotations when the inside temperature = set temperature, and rotation speed = 0 when the inside temperature <set temperature. The rotation is output, and the compressor is turned on when the rotation speed is other than 0. Next, in 5 steps, it is judged whether or not the compressor 4 is ON, and if it is not ON, the timer 8 is cleared in 6 steps and 1
Returning to the step, if ON, proceed to step 7 and operate the timer 8. Next, in 8 steps, it is judged whether or not the timer 8 has reached the set time, and if it is the set time, the operation proceeds to step 9 to clear the value of the counter 9, and if it is not the set time, the step 9 is not executed and the operation proceeds to the next step. Next, in 10 steps, it is judged whether or not there is a signal from the protection means 7. If there is no protection signal, the procedure returns to 1 step, and if there is a protection signal, the operation of the compressor 4 is turned off in 11 steps, that is, the rotation speed = It is 0 rotation. Next, in 12 steps, the value of the counter 9 is incremented by 1 (counted up). Next, in 13 steps, it is judged whether or not the value of the 14 counter is the set value, and if it is not the set value, it waits for a fixed time in the 14 step and returns to the 1 step. (For example, a fan motor, a heater, etc. (not shown)) are turned off. Next, the sounding means 6 is operated in 16 steps.

As described above, according to the present embodiment, the timer 8 that operates for a certain period of time after the compressor 4 starts operating, and the protection means 7
By providing a counter 9 that counts the number of times of operations of the above and is cleared when the timer 8 reaches a predetermined time, when the protection means 7 operates within a certain time after the compressor 4 is turned on, the rotation speed control means 5 When it is determined that there is an abnormality, the number of times is counted by the counter 9, and when this count value reaches the set value, it is considered that the rotation speed control means 5 is out of order, all outputs are turned off, and the sound generation means 6 is activated.
The user can be informed that the rotation speed control means 5 is out of order. Therefore, there is no erroneous error determination due to malfunction or the like, and it can be determined that the failure is complete. And even if you don't look at the refrigerator when something goes wrong,
Since the notification is given by the pronunciation, it is possible to detect an abnormality from a distant place and promptly deal with the failure. Furthermore, since the volume is variable, the volume can be increased even in a noisy place, so that the notification capability can be improved. It should be noted that in the embodiment, the sounding means 6 may be not only a sound such as a buzzer but also a sound.

EFFECTS OF THE INVENTION As described above, according to the present invention, the sounding means for notifying an abnormality, the timer that operates for a fixed time after the operation of the compressor, the number of operations of the protection means are counted, and the count is cleared when the timer reaches a predetermined time. By providing such a counter, the abnormality of the rotation speed control means can be detected more reliably, and the abnormality can be notified by sounding to inform the user of the abnormality. Furthermore, since the volume of the pronunciation is variable, it is possible to notify the abnormality from a distant place even in a noisy place.

[Brief description of drawings]

FIG. 1 is a block diagram of an operation control device for a refrigerator in an embodiment of the present invention, and FIG. 2 is a flow chart for explaining the operation of FIG. 1 ... In-compartment temperature detecting means, 2 ... Set temperature detecting means, 3
...... Control means, 5 ... Rotation speed control means, 6 ... Sound producing means, 7 ... Protecting means, 8 ... Timer, 9 ... Counter.

Claims (1)

[Claims] 1. A refrigerator temperature detecting means for detecting a refrigerator internal temperature, a set temperature detecting means for detecting a set temperature, and a rotation speed control means for operating a compressor at a desired rotation speed.
Protecting means for detecting an abnormality in the rotation speed control means, a timer that operates for a fixed time after the compressor starts operating, and a counter that counts the number of operations of the protecting means and is cleared when the timer reaches a predetermined time. A sounding means for producing a sound when an abnormality occurs, and a control means for outputting a signal for determining the rotation speed of the compressor to the rotation speed control means by the outputs of the inside temperature detection means and the set temperature detection means, An operation control device for a refrigerator, wherein when the counter reaches a predetermined value or more, the sounding means informs that there is an abnormality.