KR0123428B1 - Detecting method of damper false moving of a refrigerator - Google Patents

Abstract

As internal temperature is set up by a temperature setting part(22). The internal temperature of a refrigerator is sensed by a detector(21). The comparator(31) informed of the temperatures compares the output signals of the temperature detection part(21) and the temperature setter part(22). When the set-up temperature is below the sensed temperature, outputs a control signal to open up the lst and the 2nd dampers(18,19). As the control part's readings of the signals show dampers error, it drives output part's(40) buzzer(132) and the lamp(LED) and informs damper error. In case damper error is not detected, it drives the lst motor and controls opening/closing of the lst and 2nd dampers(18,19).

Description

Malfunction malfunction detection method of the refrigerator

1 is a configuration diagram of a conventional air conditioner damper and a reed switch on / off timing chart according to the degree of opening and closing of the damper.

2 is a block diagram of a control system of a refrigerator according to the present invention.

3 is a configuration diagram of a cold air control damper having two dampers according to the present invention.

Figure 4 is a chart of the on / off timing of the reed switch according to the opening and closing degree of the cold air control damper of the present invention.

5 is an operation flowchart showing a damper malfunction detection method by the microcomputer according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Motor 10: Reed Switch

11: Connection piece 14, 15: 1st and 2nd damper drive cam

20: input unit 17, 18: first and second lifting bar

18,19: 1st and 2nd damper 30: Micom

40: output unit

The present invention relates to a cold air control damper malfunction detection method of the refrigerator, in particular, in the refrigerator equipped with two dampers for controlling the amount of cold air to determine whether two dampers are abnormal when the initial power supply, the lamp lamp and the buzzer sound when abnormal It relates to a cold air control damper malfunction detection method of the refrigerator to be sent out.

In general, in a cold device such as a refrigerator, a damper for controlling the discharge of cold air by the control of the microcomputer is provided with one damper and a reed switch in one motor.

That is, as shown in FIG. 1Aa, when the motor 1 is driven to rotate the driving gear 2, the connecting gear 3 is interlocked to drive the first driven gear 4 and the damper on which the switch driving cam 5 is installed. The second driven gear 6 in which the drive cam 7 is installed is rotated.

In addition, as shown in FIG. 1ab, when the second driven gear 6 rotates, the lifting rod 8 is lifted by the damper driving cam 7 so that the lifting rod 8 of the damper driving cam 7 is rotated. When the top dead center is reached, the damper 9 is completely opened, and at the same time, the switch driving cam 5 pushes the reed switch 10 and is connected to the connection piece 11.

After that, when the motor 1 continues to rotate and the lifting rod 8 is out of the range of the damper driving cam 7, it is returned to its original state as shown in FIG.

As described above, the damper malfunction detection method in the case where a damper is installed in the motor may be performed even if the motor 1 is driven for a predetermined time after storing the current on / off state of the reed switch 10 in a microcomputer (not shown). When the reed switch 10 does not change to the next state (the initial state is on, the next state is off, and the initial state is off, the next state is on). It is intended to inform the user of the status.

That is, as shown in FIG. 1B, when the reed switch 10 is turned off, the damper 9 is closed to block cold air supplied to the refrigerating chamber. When the reed switch 10 is turned on, the damper 9 is opened. When the reed switch 10 is not switched on or off during the time t1 when the damper 9 is completely opened because the damper 9 is closed, the abnormal state of the damper in the microcom It will be recognized as.

In the conventional damper malfunction detection method, when one damper is installed, the damper can be detected. However, when two dampers are installed in one motor, the malfunction detection is not only possible, but only the buzzer is used in the output method. By outputting privately, a problem that takes a long time to recognize an abnormal state occurs.

According to the present invention, even when two dampers are installed in one motor, a malfunction detection can be detected when each damper is driven. One damper malfunction detection is a reed switch during an arbitrary time when the damper is completely closed. If the state is not switched on or off, the microcomputer recognizes an abnormal state of the damper, and another damper malfunction detection counts the on or off state in the microcomputer for a certain time according to the rotation of the damper, If the count value does not meet the reference value set in the microcomputer, it recognizes the abnormal condition of the damper and displays buzzer sound and alarm lamp at the same time so that the malfunction of two dampers can be detected at the same time by using one reed switch. At first use, it is possible to quickly determine the abnormal condition of the electric damper and inspect it. To provide a shortcut between the cold and the after-sales service regulation damper malfunction detection method of the refrigerator to reduce the time that is the object of the present invention.

In order to achieve the above object, the present invention provides a damper control method of a refrigerator using a reed switch and controlling a two dampers by driving a motor under the control of a microcomputer. It is determined that the initial driving process L1 counting the time t from the off point of time and storing the on / off frequency of the reed switch, and the first predetermined time t1 for which the counted time after the process is arbitrarily set elapsed. When the reed switch is not connected within the first predetermined time t1, the first malfunction detection process L2 blinks the buzzer and the lamp by recognizing that one specific damper is malfunctioning, and the counted time after the process is arbitrary. When the set second predetermined time t2 is reached, it is determined whether the on / off frequency of the reed switch matches the predetermined number of times, and if it is the same, the normal operation is performed. The second malfunction detection process (L3) for blinking the buzzer and the lamp by recognizing a malfunction of the damper motor including one damper.

Hereinafter, described in detail by the accompanying drawings as follows.

2 is a configuration diagram of a control system of a refrigerator according to the present invention, and is largely divided into an input unit 20, a microcomputer 30, and an output unit 40, and the input unit 20 detects and adjusts an internal temperature of the refrigerator. The temperature detection unit 21 and the temperature setting unit 22 and the reed switch 10 for detecting the position of the damper for adjusting the amount of cold air.

In addition, the microcomputer 30 is connected to the temperature detection unit 21, the temperature setting unit 22 and the output terminal of the reed switch 10, the comparison unit 31 for generating a control signal corresponding to the set value compared with the set value And an opening / closing detection unit 32 for checking the degree of opening and closing of the damper by the reed switch 10, a control unit 33 for controlling the damper motor according to the output signals of the comparing unit 31 and the opening and closing detection unit 32; The buffer 34 is configured to selectively transmit the output signals of the comparator 31 and the controller 33 to the output unit 40 and to which the reset circuit 50 is connected.

The output unit 40 includes a drive circuit 41 for driving the motor 1 by the control signal of the microcomputer 30, and first and second dampers 18 mechanically connected to the motor 1. (19) is connected.

In the control system of the refrigerator having the configuration as described above, when the user first sets the internal temperature by adjusting the temperature setting unit 22, the internal temperature of the refrigerator is sensed by the temperature detector 21 to compare the comparison unit 31. And the comparison unit 31 compares the output signals of the temperature detector 21 and the temperature setting unit 22 with each other, and when the temperature does not reach the set temperature, the first and second dampers 18 for adjusting the amount of cold air. A control signal for opening the 19 is output.

At this time, the opening and closing detection unit 32 recognizes the opening and closing degree of the first and second dampers 18 and 19 according to the on / off state of the reed switch 10, and the comparison unit 31 and the opening and closing detection unit ( The output signal of 32 is read by the controller 33 to output the open / close signals of the first and second dampers 18 and 19 to output a signal for adjusting the amount of cold air.

Therefore, the controller 33 reads the data inputted by the program set in FIG. 5 and determines that the first and second dampers 18 and 19 are malfunctioning. The buzzer BZ and the lamp LED are driven to indicate that the damper is in an abnormal state. If no abnormality of the damper is detected, the damper BZ and the LED are recognized as normal to control the drive circuit 41 to drive the motor 1. The opening and closing of the first and second dampers 18 and 19 are controlled.

3 is a configuration diagram of a cold air control damper having two dampers applied to the present invention, that is, as shown in FIG. 3a, when the motor 1 is driven to rotate the motive gear 2, the switch driving cam 5 ) And the third and fourth driven gears 12 and 13 installed therein are interlocked to drive the first and second damper driving cams 14 and 15 toward the first and second lifting rods 16 and 17. Will move.

Thereafter, as shown in FIG. 3B, when the motor 1 continues to rotate and the second damper driving cam 15 reaches the position of the second lifting bar 17, the second lifting bar 17 moves to the second damper driving. When the top dead center of the cam 15 is reached, the second damper 19 is fully open.

Meanwhile, as shown in FIG. 3C, when the motor 1 continues to rotate and the first damper driving cam 14 reaches the position of the first lifting rod 16, the first lifting rod 16 moves to the first damper driving cam. When the first elevating rod 16 reaches the top dead center of the first damper driving cam 14, the first damper 18 is completely opened, thereby allowing the first and second dampers 18 to rise. 19 are all open to discharge the cold air into the room.

At this time, when the first and second dampers 18 and 19 are completely open, the reed switch 10 is installed under the fourth driven gear 13 and pushed by a cam not shown, thereby connecting the connecting piece 11. The first and second dampers 18 and 19 are both open as they are recognized by the microcommunication.

4 is a chart showing on / off timing of the reed switch according to the opening / closing degree of the two first and second cold air control dampers shown in FIG. 3 according to the present invention, in which the reed switch 10 is turned off. The time from 0 ° to 203 °, the time when the second damper 19 is completely turned off, is t1. If the reed switch 10 is not turned on within this time, the second damper 19 is not a malfunction of the entire electric damper. Separated by malfunction.

In addition, assuming that the time t2 of one period (0 ° to 360 °) of the first and second dampers 18 and 19 is closed in the open state, X seconds are required in the characteristics of the motor, and the reed switch 10 is operated for one minute. The number of times Y is repeated on / off (X) is once every X seconds, so 1: X = Y: 60 (sec), and the number of times the reed switch 10 is repeatedly turned on / off for 1 minute is Y = 60 / X.

On the basis of this, if the reed switch 10 determines the on / off frequency for a predetermined time and the number of times is not 60 / t2, the malfunction of the motor 1 including the first and second dampers 18 and 19 is malfunctioned. Will be regarded as.

5 is an operation flowchart showing a damper malfunction detection method by the microcomputer according to the present invention.

First, when the remaining source is supplied to the refrigerator (step 101), the damper motor 1 is operated (step 102), and at the same time, the counter starts counting the time when the reed switch 10 is turned off in the microcomputer 30 (step 104). Execute the initial drive process (L1).

After that, when it is determined that the time t counted by the microcomputer 30 has passed the first predetermined time t1 at which the second damper 19 is fully opened (step 105), the reed switch 10 is turned on or It is judged whether there is a state change of the OFF state (step 106), and when there is no state change, the second damper 19 recognizes a malfunction state and emits a buzzer sound and lights an alarm lamp, thereby causing the second damper 19 to be in an abnormal state. The first malfunction detection process (L2) that informs that it is performed.

At this time, the microcomputer 30 has a second predetermined time t2 that takes one period (0 ° -360 °) for one third predetermined time (t5 = about 1 minute) during which the first and second dampers are closed at the opening. ) Is stored in the normal state, and the number of times the reed switch 10 is repeated in the on / off state for the third predetermined time t5 is stored.

Therefore, when the microcomputer 30 determines that an arbitrary third predetermined time t5 has elapsed in step 106 of the first malfunction detection process L2 (step 108), the microcomputer 30 turns on / off the reed switch 10 until the present time. If the number of times of state change is the same as the number of times set in the microcomputer 30 (step 109), the electric damper is recognized as a good state, and the state change of the on / off state of the reed switch 10 until the present time. If the number of times that the number of times is different from the number of times set in the microcomputer 10, the damper motor 1 including the first and second dampers 18 and 19 recognizes that an abnormality has occurred and the buzzer BZ. At the same time as the sound is sent to the alarm lamp (LED) is turned on to execute the second malfunction detection process (L3) to inform that the abnormal state.

As described above, in the present invention, one damper malfunction detection is recognized as an abnormal state of the damper in the microcomputer when the state of the reed switch is not switched on or off during an arbitrary time when the damper is completely closed. Another damper malfunction detection detects the on / off state according to the rotation of the damper in the micom for a certain time, and if its count value does not meet the reference value set in the micom, the damper detects an abnormal state of the damper By simultaneously displaying the discharge pipe alarm lamps, one reed switch can be used to detect malfunctions of two dampers at the same time, and consumers can determine the abnormal condition of the electric damper at the first time in a short time. The service time can be reduced.

Claims (1)

In a damper control method of a refrigerator in which a single reed switch is used and a motor is controlled by a microcomputer to control two dampers, the damper driving motor is operated when the power is supplied, The first driving process L1 counting t) and storing the on / off count of the reed switch, and the first predetermined time t1 determined after the predetermined predetermined first predetermined time t1 have elapsed after the process is counted. The first malfunction detection process L2, which flashes the buzzer and the lamp by recognizing that one specific damper is malfunctioning when the reed switch is not connected within the time t1, and the second predetermined predetermined predetermined time after the process. When the time t2 is reached, the normal operation is performed by comparing the on / off frequency of the reed switch with the predetermined number of times, and if it does not match, the damper motor including the other damper malfunctions. As to whether the second malfunction detection process, cool air control damper malfunction detecting method of the refrigerator, which is characterized by being a (L3) to flash the lamp and buzzer.