JP2736582B2 - Electric control for dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for automatically washing dishes, and more particularly, to an electric control device for a dishwasher for coping with abnormalities of the dishwasher.

[0002]

2. Description of the Related Art Conventionally, an electric control device of this kind has been disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 3-118017.
When the power switch is turned on, the operation of the dishwasher is started to automatically wash the dishes. On the other hand, if the washing water in the washing tank exceeds the overflow level during the operation, the electric control device stops the operation, drains the washing water in the washing tank, and issues an alarm. The alarm is released by switching the power switch from on to off.

[0003]

However, in the above-mentioned conventional apparatus, the washing water in the washing tank exceeds the overflow level, the operation of the dishwasher is stopped, and after the drainage treatment is performed, the washing machine is turned off. When the power switch is turned on, the operation of the dishwasher is restarted without determining why the washing water in the washing tank has exceeded the overflow level. This means that the operation of the dishwasher is restarted while an abnormality is present in the dishwasher, which is not preferable for the dishwasher. SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and an object of the present invention is to provide an electric control device for a dishwasher in which the operation of the dishwasher is not restarted without investigating the abnormality. It is in.

[0004]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
A structural feature of the present invention is that a water supply system that supplies cleaning water into a cleaning water tank by turning on a power switch provided in a power supply path and manually switched.
Washing machine that injects washing water in the washing water tank to tableware
Drainage process to drain the washing water in the washing water tank
An electric control device for a dishwasher that automatically starts washing operation by further washing the tableware, comprising: an abnormality detection unit that detects an abnormality of the dishwasher; and the cleaning operation in response to the abnormality detection. Stop control means for stopping the operation ,
Notifying means for notifying an abnormality in response to the abnormality detection; abnormality storing means for storing that an abnormality has been detected in response to the abnormality detection; and abnormality by the notifying means when the power switch is off. and a notification prohibiting means for prohibiting the notification, the operation inhibiting means for inhibiting the wash running operation when the abnormality of the dishwasher has been detected is stored in the abnormality storage means, cleaning in response to said abnormal detection water tank
Start draining of the washing water inside and turn on the power switch.
Continue draining operation for a predetermined time independently of the OFF state.
And a drain control means for stopping the drain operation after a lapse of the predetermined time .

[0005]

[0006]

According to the present invention constructed as described above, the power switch is turned on and the dishwasher is operated for cleaning.
If an abnormality occurs in any of the dishwashers during the rolling operation , the abnormality detecting means detects the abnormality. In response to the anomaly detection, washed luck stop control means dishwasher
The rolling operation is stopped, the notifying unit notifies the abnormality, and the abnormality storing unit stores that the abnormality is detected. And
When the user notices the abnormality of the dishwasher by the abnormality notification and turns off the power switch, the information prohibition unit cancels the abnormality notification. Thereby, the abnormality notification can be canceled by a simple operation. In such a state, even if the user turns on the power switch again, the operation prohibition means prohibits the washing operation of the dishwasher based on the fact of the abnormality detection stored in the abnormality storage means. Cleaning operation of the washing machine without investigating the abnormality that occurred previously
Operation is not resumed. This prevents the washing operation of the dishwasher from being restarted in an unstable state where there is an abnormality in the dishwasher, and protection of the dishwasher is ensured.

Further, in the present invention, when an abnormality occurs in the dishwasher as described above , the drainage control means responds to the abnormality detection by the abnormality detection means, and the washing water in the washing water tank.
Start to drain water, and the power switch
After standing up and continuing the draining operation for a predetermined time,
Since the drainage operation is stopped after the passage of
Turn off the power switch to stop reporting the abnormality.
Even after stopping, wash water in the wash water tank must be drained.
Be watered. As a result, even if an abnormality occurs in the dishwasher, overflow of the washing water can always be prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows an entire dishwasher according to the embodiment. This dishwasher has a washing tank 20 housed in a box-shaped housing 10. Cleaning tank 2
0 accommodates a rack 23 on which tableware 22 to be put in and out through a front door 21 is accommodated at the center thereof, and supports a pair of washing nozzles 24 and 25 on the upper and lower surfaces thereof. The cleaning nozzles 24 and 25 are provided with a circulation pump 26.
By the operation of, the washing water circulated and supplied from the washing water tank 27 formed at the bottom of the washing tank 20 through the circulation pipe 28 is jetted toward the tableware 22 while rotating. Cleaning tank 2
A water supply pipe 31 is connected to the back wall 20a of the water supply pipe 30 at an outlet thereof. The water supply pipe 31 supplies high-temperature cleaning water from an external water supply source (not shown) to a cleaning water tank 27 through a water supply valve 32.
To supply. Opening 2 provided on back wall 20a of cleaning tank 20
A dryer 33 composed of a heater and a fan is attached to 0b, and the dryer 33 blows out hot air into the cleaning tank 20. The dryer 33 is provided with a temperature-sensitive switch 34. The switch 34 is normally in an off state, and is turned on when the temperature of the dryer 33 is overheated to a predetermined temperature or higher.

A drain pipe 35 and a sub-tank pipe 36 branch off from the circulation pipe 28. The drainage pipe 35 is provided with a drainage pump 37, and the pump 3
7 discharges the washing water in the washing water tank 27 to the outside of the machine through the drain pipe 35 by the operation. The tip of the sub-tank pipe 36 communicates with the sub-tank 38, in which a reference water level switch 41 and an overflow switch 42 are provided.
Is housed. The reference water level switch 41 detects that the water level of the cleaning water in the cleaning water tank 27 has reached a reference level indicating a height required for cleaning or the like. If the water level is higher than the reference level, it is turned on. And if the height of the water surface is lower than the reference level, it is turned off. The overflow switch 42 detects an overflow level that is higher than the reference level and that defines the height of the water surface immediately before the washing water in the washing water tank 27 overflows outside the machine.
If the height of the water surface is higher than the overflow level, it is turned on, and if the height of the water surface is lower than the overflow level, it is turned off.

Next, an electric control device for electrically controlling the dishwasher configured as described above will be described with reference to the drawings. FIG. 2 is a block diagram of the electric control device.

This electric control device has a control circuit 50,
The circuit 50 is supplied with power via input buses L ₁ and L ₂ . With 120 volt alternating current is applied to the input bus L _1, input bus L ₂ is grounded. Between the input bus L _1, L ₂ coils X ₁ of the power switch 51 and the relay switch 52 are connected.
And the movable contact 51a power switch 51 is turned on and off by a manual operation, the movable contact 51a by the excitation is connected to a connection point between the control circuit movable contact 51a and the coil X ₁ in connected and the other end 50 at one end Off coil 51b
And Coil X ₁ of the relay switch 52,
A normally open contact X having both ends connected to the control circuit 50 by excitation
_{11 is} to turn on.

[0012] Between the output side of the input bus L ₁ and the control circuit 50 is connected to the electric motor 37a of the drainage pump 37,
Between the connection point of the coils X ₁ of the movable contact 51a and a relay switch 52 of the power switch 51 and the output side of the control circuit 50, the electromagnetic solenoid 32a of water valve 32, the dryer 33, the electric motor 26a of the circulation pump 26 , Display 53
And an alarm 54 are connected. The control circuit 5
The zero-input side is connected to the temperature-sensitive switch 34, the reference water level switch 41, and the overflow switch 42, as well as the standard course switch 55 and the strong course switch 56. The standard course switch 55 selects to wash the tableware 22 in a standard manner, and the strong course switch 56 selects to wash the tableware 22 intensely. The control circuit 50 controls the CP
U, ROM, RAM, an interrupt timer, a microcomputer including various other timers, I / O, etc., and repeatedly executes a "main program" corresponding to the flowcharts of FIGS. The "interrupt program" corresponding to the flowcharts of FIGS.

Next, the operation of the embodiment configured as described above will be described. When power is supplied to the control circuit 50 via the input buses L ₁ and L ₂ , the circuit 40 starts executing the “main program” in step 100 of FIG. A timer flag TMF for indicating that the 30-second timer is counting, an overflow flag ISF for indicating that the overflow switch 42 has detected the overflow level, and a temperature-sensitive switch 34 for detecting that the temperature of the dryer 33 is higher than a predetermined temperature. Initially, the drying flag KSF for indicating that the alarm has occurred and the notification flag HOF for indicating that the display unit 34 and the alarm unit 35 indicate that an abnormality has occurred are set to "0". After this initial setting process, at step 102, the water supply valve 3
The power supply to the electromagnetic solenoid 32a, the heater and the fan of the dryer 33, the electric motor 26a of the circulation pump 26, and the electric motor 37a of the drain pump 37 is turned off to turn off the water supply valve 32, and the dryer 33 and the circulation pump 26 and the drain pump 37 are stopped, and the processing of steps 103 to 113 is repeatedly executed.

In this circulating process, the control circuit 50 turns off the display 53 at step 103 and proceeds to step 1
04 at determines whether the power switch 51 according to the state of the normally open contact X ₁₁ of the relay switch 52 is ON. Until the power switch 51 is turned on, the control circuit 50
Continues to determine “NO” in step 104, and continues to execute the determination processing in step 104. The user is in the cleaning tank 21
After placing the detergent accommodates a rack 23 mounted with the dishes 22 within, when turning on the movable contact 51a of the power switch 51, the normally open contact X ₁₁ coil X ₁ is energized the relay switch 52 is turned on . Thereby, the control circuit 5
In the case of “0”, it is determined “YES” in step 104 and the program proceeds to step 105. In step 105, the display 53 displays an input request such as an operation condition of the dishwasher. Next, at step 106, it is determined whether or not an abnormality has been notified based on the value of the notification flag HOF.

First, the case where the dishwasher is operating normally will be described. The notification flag HOF is initially set to "0" in step 101. Accordingly, "NO" is determined in step 106, and whether or not the standard course switch 55 is turned on in step 107 is determined.
It is determined whether or not the strong course switch 56 has been turned on. If the standard course switch 55 is turned on, "YES" is determined in the step 107, and the program proceeds to a "standard course routine" in a step 109. If the strong course switch 56 is turned on, "YES" is determined in the step 108, and the program proceeds to the "strong course routine" in the step 110. If neither the standard course switch 55 nor the strong course switch 56 is turned on, “N
It is determined as "O" and the program returns to step 104.

The case where the standard course is selected will be described. The control circuit 50 executes the "standard course routine" shown in the flowcharts of FIGS.
Start with In this flowchart,
Since only the washing time of the tableware 22 is different between the standard course and the strong course, the case of the strong course is shown in parentheses based on the case of the standard course. First,
The control circuit 50 repeatedly executes the process of the water supply process consisting of steps 121 to 123 until the washing water in the washing water tank 27 reaches the reference level. During the process of the water supply process, the control circuit 50 keeps turning on the water supply valve 32 by exciting the electromagnetic solenoid 32a, and supplies the high temperature clean water from the external water supply source to the cleaning water tank 2 through the water supply pipe 31.
7 When the washing water in the washing water tank 27 reaches the reference level by this water supply, the reference water level switch 41
Turns on. As a result, the control circuit 50 executes step 12
3 is determined to be "YES", and in step 124, the excitation of the electromagnetic solenoid 32a is released, so that the water supply valve 32
To end the water supply process.

Next, the control circuit 50 starts counting the time of the two-minute timer set to two minutes in step 125, and performs the processing of the cleaning process consisting of steps 126 to 128 until the timer counts two minutes. Execute repeatedly. During the cleaning process, the control circuit 50 continues to operate the circulation pump 26 by energizing the electric motor 26a, and supplies the cleaning water containing the detergent in the cleaning water tank 27 through the circulation pipe 28 to the cleaning nozzle 24, To 25. As a result, the washing nozzles 24 and 25 spray cleaning water onto the tableware 22 while rotating, so that the tableware 22 is washed. After the start of the washing,
When two minutes have elapsed, the control circuit 50 determines "YES" in step 128, and stops the circulation pump 26 by stopping power supply to the electric motor 26a in step 129, thereby terminating the cleaning process.

Next, the control circuit 50 starts counting the time of the 30-second timer set to 30 seconds in step 130. Until the timer measures 30 seconds, the steps 131 to 13 are executed.
The process of the drainage process consisting of 3 is repeatedly executed. During the process of the drainage process, the control circuit 50 keeps operating the drainage pump 37 by energizing the electric motor 37a, and discharges the cleaning water in the cleaning water tank 27 to the outside through the drainage pipe 35. Thereby, the dirty washing water after washing the tableware 22 is discharged to the outside. When 30 seconds have elapsed after the start of the drainage, the control circuit 50 determines in step 133 that “YE
S ”, and at step 134, the electric motor 37a
The drainage pump 37 is stopped by terminating the power supply to the power supply to terminate the drainage process.

Next, the control circuit 50 sets the count value N indicating the number of times of rinsing to "2" in step 135, and then executes the water supply process in steps 136 to 139 similar to the processing in steps 121 to 124 described above. Execute the process of
The washing water is filled in the washing water tank 27 to a reference level.
After this water supply process, the control circuit 50 proceeds to Step 1 described above.
By the processes in steps 140 to 144 similar to steps 25 to 129, the circulating pump 26 is operated for 30 seconds to pump the cleaning water to the cleaning nozzles 24 and 25. In this case, the cleaning tank 20
Since the detergent is not poured into the inside, the tableware 22 is rinsed with the cleaning water sprayed from the cleaning nozzles 24 and 25. After this rinsing step, the control circuit 50
Step 14 similar to steps 130 to 134 described above
By the processing of 5-149, the processing of the drainage process is executed for 30 seconds. Next, the control circuit 50 subtracts “1” from the count value N in step 150, and determines in step 151 whether or not the count value N is “0”. In this case, since the count value N has been set to “1” by the subtraction, the control circuit 50 determines “NO” in step 151 and advances the program to step 136. And
The control circuit 50 executes the processes of the water supply process of steps 136 to 139, the process of the rinsing process of steps 140 to 144, and the process of the drainage process of steps 145 to 149 described above to perform the second rinse of the tableware 22. Do. After this rinsing, the control circuit 50 again subtracts "1" from the count value N at step 150, so that the count value N
Becomes "0". In this case, control circuit 50 determines "YES" in step 150, and ends the execution of the "standard course routine" in step 152.

After the end of the "standard course routine", the control circuit 50 executes the "drying routine" in step 111 of FIG. The control circuit 50 starts the execution of the “drying routine” shown in the flowchart of FIG. In the “drying routine”, the control circuit 50 first activates the heater and the fan of the dryer 33 in steps 171 and 172. As a result, hot air is blown into the washing tank 20 and the
Begins to dry. Next, the control circuit 50 executes step 17
The timer of the 30-minute timer set to 30 minutes is started in Step 3, and Step 17 is continued until the timer measures 30 minutes.
4, 175 are repeatedly executed. 30 minutes after the start of the drying of the tableware, the control circuit 50 determines "YES" in step 175, and advances the program to steps 176 and 177. Then, the control circuit 50 stops the operation of the heater and the fan of the dryer 33 in steps 176 and 177, and ends the execution of the “drying routine” in step 178. As a result, the tableware 22 is dried by hot air for 30 minutes and dries.

After the end of the "drying routine", the control circuit 50 excites the electromagnetic solenoid 51b of the power switch 51 in step 112 of FIG. Thereby, the movable contact 51a is turned off, and the electromagnetic solenoid 32a of the water supply valve 32,
Dryer 33, the electric motor 26a of the circulation pump 26, the indicator 53 and alarm 54 are disconnected from the input bus L _1. Thereafter, the control circuit 50 executes the program in step 10.
3 and the above-described processing of steps 103 to 112 is repeatedly executed.

When the user turns on the strong course switch 56 to wash the tableware 22 strongly, the control circuit 50 determines "YES" in step 108,
The processing of the “strong course routine” of step 110 is executed. The specific processing of this "strong course routine"
As shown in parentheses of steps 125 and 128 in FIG.
The only difference from the processing in the “standard course routine” is that the washing time of the tableware 22 is 10 minutes. As a result, when the strong course is selected, the tableware 22 is washed for a long time, and terrible dirt is also washed away.

On the other hand, when the processing of steps 103 to 112 (FIG. 3) is being executed, the control circuit 50
Shows the "interrupt program" shown in Figs.
Execute interrupt every msec. This "interrupt program" is started in step 190, and the control circuit 50 determines in step 191 whether or not the timer flag TMF is set to "1" indicating that the 30-second timer for abnormal drainage is counting. Is determined. In this case, since no abnormality has occurred in the dishwasher, the timer flag TMF is set to “
Accordingly, the control circuit 50 determines “NO” in step 191 and advances the program to step 192. In step 192, the overflow switch 4
It is determined whether or not 2 is on. Wash water tank 20
Since the level of the wash water in a is usually lower than the overflow level, the control circuit 50 determines “NO” in step 192 and proceeds to step 193. Step 1
At 93, the control circuit 50 determines whether the temperature sensitive switch 34 is on. Also in this case, if the dishwasher is normal, the temperature-sensitive switch 34 is off. Accordingly, control circuit 50 determines “NO” in step 193 and advances the program to step 194 (FIG. 8). In step 194, the control circuit 50 determines the normally open contact X ₁₁ of the relay switch 52 by whether or not ON, whether the movable contact 51a of the power switch 51 is in an ON state.

If the dishwasher is waiting for selection of a washing course, supplying water to the washing tank 27, washing, rinsing or drying the dish 22, the movable contact 51a of the power switch 51
Is on. Accordingly, in this case, control circuit 50 determines “YES” in step 194 and advances the program to steps 195 and 196. Step 19
In step 5, it is determined whether or not the overflow flag ISF is "1", and in step 196, the drying flag KSF is set to "1".
1 ". Also in this case, both flags IS
Since F and KSF are both set to "0", both of the steps 195 and 196 determine "NO", and the execution of the "interrupt program" is terminated in a step 197.

If the dishwasher has finished drying the tableware 22, the movable contact 51a of the power switch 51 is turned off by the processing of step 112 described above. In this case, control circuit 50 determines “NO” in step 194 and advances the program to step 210. In step 210, the alarm operation of the alarm 54 is released. Then, after the processing of step 210, step 1
At 97, the execution of the "interrupt program" is terminated.

Next, a case where an abnormality occurs during the operation of the dishwasher will be described. When the water level in the washing water tank 27 exceeds the overflow level, the overflow switch 42 is turned on. As a result, the control circuit 50 determines "YES" in step 192 (FIG. 7) of the "interrupt program", sets the overflow flag ISF to "1" in step 198, and advances the program to steps 199 to 201. . When an abnormality occurs in the dryer 33 and the temperature of the dryer 33 becomes abnormally high, the temperature-sensitive switch 34 is turned on. As a result, the control circuit 50 determines “YES” in step 193, sets the drying flag KSF to “1” in step 208, and advances the program to steps 199 to 201. The control circuit 50 determines in step 199 that the notification flag HOF
Is set to “1” and at step 200 3
The timer of the 0 second timer is started, and in step 201, the timer flag TMF is set to "1". Next, the control circuit 50
Determines in step 202 whether the 30 second timer has counted up. In this case, since the 30-second timer has just started counting, step 202
Is determined to be "NO" and the program proceeds to step 203. The control circuit 50 activates the drain pump 37 by energizing the electric motor 37a in step 203, so that the washing water in the washing water tank 27 is supplied to the drain pipe 35.
Begins to be discharged out of the machine via.

Next, the control circuit 50 determines in step 194 whether or not the movable contact 51a of the power switch 51 is on. In this case, the dishwasher is in operation and the movable contact 51a is on. Accordingly, the control circuit 50 determines “YES” in step 194, and
The above-described determination processing of steps 195 and 196 is executed. If the overflow flag ISF is “1” due to an overflow,
The control circuit 50 determines “YES” in step 195, controls the display 53 and the alarm 54 in step 207, displays that the water is overflowing on the display 53, and sets the alarm 54 to Activate. Thus, the user can visually recognize the occurrence of overflow of the dishwasher by the display of the display 53 and can also recognize the occurrence of overflow by the buzzer sound of the alarm 54. On the other hand, if the drying flag KSF is "1" due to the temperature abnormality of the dryer 33, the control circuit 50
Determines “YES” in step 196 and returns to step 2
At 09, the display 53 and the alarm 54 are controlled to display that the temperature of the dryer 33 is abnormal on the display 53, and the alarm 54 is operated. Thus, the user can visually recognize the temperature abnormality of the dishwasher by the display of the display 53 and can also recognize the temperature abnormally by the buzzer sound of the alarm 54. Next, the control circuit 50 terminates the execution of the "interrupt program" in step 197.

On the other hand, when the above-described abnormality occurs,
If the control circuit 50 is executing the process of the water supply process consisting of steps 121 to 123 (FIG. 4), it is determined at step 122 that the notification flag HOF is "1"
S ”is determined, and the program proceeds to step 153.
After turning off the water supply valve 32 in step 153, the control circuit 50 continues to execute the determination process in step 154 and stops the operation of the dishwasher until the movable contact 51a of the power switch 51 is turned off. The control circuit 50 executes step 126
If the process of the cleaning process consisting of steps 128 to 128 (FIG. 4) is being executed, it is determined as "YES" in step 127 based on the fact that the notification flag HOF is "1", and the program proceeds to step 155. The control circuit 50 determines in step 155
After stopping the circulation pump 26, the power switch 51
Until the movable contact 51a is turned off, the determination process of step 156 is continuously executed and the operation of the dishwasher is stopped.
If the control circuit 50 is executing the process of the drainage process consisting of steps 131 to 133 (FIG. 4), it is determined in step 132 that the notification flag HOF is "1"
S ”and the program proceeds to step 157.
After stopping the drain pump 37 in step 157, the control circuit 50 continues to execute the determination processing in step 156 and stops the operation of the dishwasher until the movable contact 51a of the power switch 51 is turned off. If the control circuit 50 is executing the process of the water supply process consisting of steps 136 to 138 (FIG. 5), the notification flag HOF is set to "" in step 137.
The determination is "YES" based on the fact that it is "1", and the program proceeds to step 159. After the control circuit 50 turns off the water supply valve 32 in step 159, the power switch 5
Step 160 until the first movable contact 51a is turned off.
And the operation of the dishwasher is stopped. If the control circuit 50 is executing the process of the rinsing process consisting of steps 141 to 143 (FIG. 5), step 1
At 42, the determination is "YES" based on the fact that the notification flag HOF is "1", and the program proceeds to step 161. The control circuit 50 determines in step 161 that the circulation pump 2
6, the movable contact 51a of the power switch 51
Until is turned off, the determination process of step 162 is continuously executed to stop the operation of the dishwasher. If the control circuit 50 is executing the process of the drainage process consisting of steps 146 to 148 (FIG. 5), at step 147, the notification flag HOF is set.
Is "1", the determination is "YES", and the program proceeds to step 163. After stopping the drain pump 37 in step 163, the control circuit 50 continues to execute the determination processing in step 164 and stops the operation of the dishwasher until the movable contact 51a of the power switch 51 is turned off. The control circuit 50 executes steps 174 and 175
If the process of the drying process consisting of (FIG. 6) is being executed, the program proceeds to step 174 by determining "YES" based on the fact that the notification flag HOF is "1".
Go to 79,180. The control circuit 50 determines in step 179
After the operation of the heater of the dryer 33 is stopped at step 180 and the operation of the fan of the dryer 33 is stopped at step 180, the determination process of step 181 is executed until the movable contact 51a of the power switch 51 is turned off. Continue to stop the operation of the dishwasher. If the control circuit 50 is executing the waiting process of steps 104 to 108 (FIG. 3) before the dishwasher starts cleaning, it is determined in step 106 that the notification flag HOF is "1". Is determined to be "YES", the program proceeds to step 113, and the determination process of step 113 is continuously executed until the movable contact 51a of the power switch 51 is turned off to stop the operation of the dishwasher.

When the execution of the "interrupt program" is started again in this state, the control circuit 50 sets the timer flag TM set to "1" in step 191.
A "YES" determination is made based on F and the program proceeds to step 202. The control circuit 50 determines in step 202 whether the 30-second timer for abnormal drainage has finished measuring the time of 30 seconds. If the 30-second timer has not finished measuring the time of 30 seconds, the control circuit 50 determines “NO” in step 202 and continues to operate the drain pump 37 by the processing of step 203. This allows
The drain pump 37 continues to operate for 30 seconds after the occurrence of the abnormality, so that the washing water is prevented from overflowing from the washing water tank 27 to the outside. When the 30-second timer finishes measuring the time of 30 seconds, the control circuit 50 determines “YES” in step 202 and executes the program in steps 205 and 2.
Proceed to 06. In step 205, the drainage pump 3
7 is stopped, and in step 206, the timer flag
TMF is initialized to "0". Thereby, the drainage by the drainage pump 37 ends. Next, as described above, the control circuit 50 determines in step 194 whether or not the movable contact 51a of the power switch 51 is off. still,
If the movable contact 51a is kept on, the control circuit 50 determines "YES" at the switch 194, and advances the program to the switch 195 and thereafter.

On the other hand, when the user notices an abnormality in the dishwasher and turns off the movable contact 51a of the power switch 51 by manual operation, the above-mentioned steps 113, 154, 1 are performed.
During execution of the determination processing of 56, 158, 160, 162 or 164, the control circuit 50 executes the same steps 113, 15
At step 4, 103, 158, 160, 162 or 164, "YES" is determined and the program is executed.
Return to (FIG. 3). Since the control circuit 50 controls the display 53 to turn off in step 103, the display of the content of the abnormality on the display 53 disappears. The movable contact 5 of the power switch 51
Until 1a is turned on, the control circuit 50 determines “NO” in step 104 and continues to execute the determination processing in step 104. In this case, in the “interrupt program”, the control circuit 50 determines “NO” in step 194 (FIG. 8), and cancels the abnormal alarm by the alarm 54 in step 210.

In this state, when the user again turns on the movable contact of the power switch 51 by manual operation, the control circuit 50 determines "YES" in step 104, and executes the program in step 1 via step 105.
Proceed to 06. In this case, the notification flag remains set to “1”. Thereby, control circuit 50 determines “YES” in step 106 and advances the program to step 113. In step 113, the control circuit 50 continues to make the determination of "NO" and continues to execute the determination process of step 113 until the movable contact of the power switch 51 is manually turned off as described above. On the other hand, at this time, when the "interrupt program" is executed,
As described above, control circuit 50 determines “YES” in step 194 (FIG. 8) and executes the program in step 1.
95, 196, 207, 209. As a result, by the processing of steps 207 and 209, an abnormality notification for notifying the overflow abnormality or the temperature abnormality of the dryer 33 is made.

As described above, if an overflow or an abnormal temperature of the dryer occurs during the operation of the electric control device, the control circuit 5
In the case of 0, the operation of steps such as water supply, washing, drainage, and rinsing of the tableware 22 is stopped, and an abnormality is notified by the display 53 and the alarm 54. When the movable contact 51a of the power switch 51 is turned off, the abnormality notification is released. In this state, the movable contact 5 of the power switch 51 is
When 1a is switched on, an abnormality is notified, but the dishwasher is not returned to the operating state, and therefore the dishwasher is not operated in an unstable state.

Next, a case where the above-mentioned abnormality occurs during the stoppage of the operation of the dishwasher before the start of the water supply step or after the end of the drying step will be described. In this case, the power switch 5
Since the first movable contact 51a is off, the control circuit 5
0 continues the execution of the determination processing of step 104. on the other hand,
In the "interrupt program", the control circuit 50
Are the various flags composed of steps 191 to 206 described above.
After the setting of ISF, KSF, HOF, and TMF and the drainage treatment of the washing water in the washing water tank 27, "N" is set in step 194 (FIG. 8).
In step 210, the alarm from the alarm 54 is released. In this case, step 194 is performed.
Steps 195, 196,
Since the processing of 207 and 209 is not executed, the display 53
No abnormal contents are displayed, and no abnormal alarm is generated by the alarm 54. Therefore, in the stopped state of the dishwasher, the overflow abnormality or the
When the temperature abnormality occurs, the control circuit 50 stores the abnormality occurrence and discharges the cleaning water in the cleaning water tank 27, but does not report the abnormality.

In this state, when the movable contact 51a of the power switch 51 is turned on by manual operation, the control circuit 50 determines "YES" in step 106, advances the program to step 113, and proceeds to step 113. Until the movable contact 51a is turned off, the determination processing of step 113 is continuously executed. On the other hand, in the “interrupt program”, the control circuit 50 determines “YES” in step 194, and proceeds to steps 195, 196, 20
7 and 209 are executed. Thereby, in this case, the control circuit 50 prohibits the operation of the dishwasher, but notifies the abnormality.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view schematically showing a dishwasher according to an embodiment of the present invention.

FIG. 2 is a block diagram of an electric control device for the dishwasher.

FIG. 3 is a flowchart of a “main program” executed by the control circuit of FIG. 2;

FIG. 4 is a first half of a flowchart showing a standard course and a strong course in FIG. 3;

FIG. 5 is a second half of the flowchart showing the standard course and the strong course in FIG. 3;

FIG. 6 is a flowchart showing a drying routine of FIG. 3;

FIG. 7 is a first half of a flowchart of an “interrupt program” executed by the control circuit of FIG. 2;

8 is a latter half of a flowchart of an “interrupt program” executed by the control circuit of FIG. 2;

[Explanation of symbols]

20 ... washing tank, 22 ... tableware, 24, 25 ... washing nozzle,
26 ... circulation pump, 27 ... wash water tank, 32 ... water supply valve, 33 ... dryer, 34 ... temperature switch, 37 ... drain pump, 38 ... sub tank, 41 ... standard water level switch, 4
2: overflow switch, 50: control circuit (microcomputer), 51: power switch, 52: relay switch,
53 ... display, 54 ... alarm.

Claims (1)

(57) [Claims] 1. A cleaning method comprising the steps of: turning on a power switch provided in a power supply path, which is manually switched.
Water supply process for supplying cleaning water into the water tank,
Cleaning process in which cleaning water in
Cleaning operation consisting of a drainage process that drains cleaning water in the tank
In the electric control device for a dishwasher to start work by washing dishes automatically stops and abnormality detecting means for detecting an abnormality of the dishwasher, the washing operation operates in response to the abnormality detecting Stop control means, notifying means for notifying an abnormality in response to the abnormality detection, abnormality storage means for storing that an abnormality has been detected in response to the abnormality detection, and when the power switch is in an off state A notification prohibition unit that prohibits the abnormality notification by the notification unit; a driving prohibition unit that prohibits the cleaning operation when the abnormality storage unit stores the detection of the abnormality of the dishwasher; and the abnormality detection. Of washing water in the washing water tank in response to
And independent of the on / off state of the power switch
After the drain operation has been continued for a predetermined time,
And a drain control means for stopping the drain operation after the elapse of the period .