JPH0938014A - dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dish washer to be protected from washing water pump racing by detecting idle running of the water supply pump and stopping the motor momentarily. SOLUTION: Washing water in a washing chamber 1 is sprayed by a washing pump 4 driven by a motor 5. The voltage at a phase advancing capacitor 14 for the motor 5 is detected by a voltage sensing means 15. A control means 16 controls the washing sequence of washing, rinsing, and drying, and also is so set up as to stop the driving of the motor 5 according to an output change of the voltage sensor 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes by spraying washing water on the dishes stored in a washing tank.

[0002]

2. Description of the Related Art In recent years, a dishwasher having a program for sequentially controlling a series of steps such as washing, rinsing, and drying has become mainstream.

Conventionally, this kind of dishwasher has been constructed as shown in FIG. Hereinafter, the configuration will be described.

As shown in the figure, a cleaning tank 1 stores dishes 2 inside and stores cleaning water at the bottom. Cleaning nozzle 3
Is rotatably supported in the washing tank 1 and spouts washing water toward the tableware 2. The washing pump 4 sends the washing water to the washing nozzle 3, and the washing pump 4 uses a motor 5
Driven by. The water level sensor 6 detects the water level in the cleaning tank 1 and outputs it as an electric signal.

The heater 7 is arranged at the bottom of the cleaning tank 1,
Heat the wash water. The thermistor 8 is attached to the bottom of the cleaning tank 1 so as to be in close contact with the outside, and detects the temperature of the cleaning water. The blower fan 9 sends out the steam in the cleaning tank 1 and is discharged from the exhaust port 10 to the outside of the machine. Cleaning tank 1
The tableware basket 11 in which the tableware 2 is arranged is housed inside, and the leftover filter 12 is provided at the bottom. Control means 13
Sequentially controls a series of steps of cleaning, rinsing and drying the tableware 2. Reference numeral 14 denotes a phase advancing capacitor of the motor 5.

To explain the operation in the above configuration, when the user places the dishes 2 in the dish basket 11 and stores them in the washing tub 1, puts the detergent and then starts the operation, the water level sensor at the bottom of the washing tub 1 A predetermined amount of tap water is supplied until 6 detects a predetermined water level. Then, the motor 5 and the heater 7 are energized, and the washing water is heated and jetted from the washing nozzle 3 toward the dishes 2 by the washing pump 4. At this time, the temperature of the wash water is detected by the thermistor 8, and the control means 13 always grasps the temperature of the wash water.

The temperature of the wash water reaches a predetermined temperature, and
When a predetermined time has elapsed from the start of cleaning, the control means 13 ends the cleaning process and once drains the cleaning water. Next, tap water is newly supplied, and the same operation as the above-mentioned washing process is performed for several minutes to drain the water. After repeating this rinsing process several times,
An operation similar to a washing step called a heat rinsing step is performed, and when a predetermined temperature is reached, the operation is ended and drained. Finally, the blower fan 9 is operated to discharge the steam in the cleaning tank 1 to the outside of the machine, and at the same time, the heater 7 is intermittently energized to heat the tableware 2 and dry the attached water droplets.

[0008]

However, in the above-mentioned conventional dishwasher, when the residual food is collected in the residual food filter 12 and the air enters the cleaning pump 4, the cleaning pump 4 idles and the cleaning water is no longer sprayed. It has a problem that the cleaning performance is deteriorated.

The present invention is intended to solve the above problems, and it is a first object of the present invention to detect idling of a washing pump and temporarily stop the operation to prevent idling of the washing pump.

A second object is to judge the abnormality by the cycle or the number of times the cleaning pump is repeatedly stopped due to idling.

A third object is to notify the user that the number of times the cleaning pump has been stopped due to idle rotation is abnormal.

A fourth object of the present invention is to prevent the cleaning performance from being deteriorated due to the reduction of the injection amount due to the residual food of the residual food filter.

[0013]

In order to achieve the above first object, the present invention provides a motor for driving a cleaning pump for injecting cleaning water in a cleaning tank and a voltage for a phase advancing capacitor of the motor. Voltage detection means to detect, washing dishes,
A first control means for sequentially controlling a series of rinsing and drying steps, wherein the control means stops the operation of the motor based on a change in the output of the voltage detection means.
Is used as a means for solving the problem.

In order to achieve the second object, the second problem is that the control means of the first problem solving means determines the abnormality by the detection cycle or the number of times of the voltage detection means. It is a solution.

In order to achieve the third object, a motor for driving a cleaning pump for injecting cleaning water in a cleaning tank, a voltage detecting means for detecting a voltage of a phase advancing capacitor of the motor, and a tableware And a control means for sequentially controlling a series of steps of cleaning, rinsing, and drying, and the control means,
The third problem solving means is to notify the abnormality by the number of times of detection by the voltage detecting means.

In order to achieve the fourth object, a motor for driving a cleaning pump for injecting cleaning water in a cleaning tank, a voltage detecting means for detecting a voltage of a phase advancing capacitor of the motor, and a tableware And a control means for sequentially controlling a series of steps of cleaning, rinsing, and drying, and the control means,
A fourth problem solving means is that the cleaning time is added depending on the number of times of detection by the voltage detecting means.

[0017]

According to the first means for solving the above problems, the present invention provides:
By the output of the voltage detection means, it is possible to detect the idling of the washing pump due to the air entering the washing pump,
When the washing pump spins idle, the operation can be temporarily stopped and the air that has entered can be exhausted to the outside to prevent the washing pump spinning idle.

Further, by the second means for solving the problem, the abnormality can be judged by the detection cycle or the number of times of temporary stop due to the idling of the cleaning pump.

Further, by the third means for solving the problem, it is possible to notify the user of the abnormality by the number of times the washing pump is temporarily stopped due to idle rotation.

Further, according to the fourth means for solving the problems, the cleaning time is added by the number of times the cleaning pump is temporarily stopped due to idling of the cleaning pump, and the cleaning performance is deteriorated due to the reduction of the injection amount of cleaning water in the residual food of the residual filter. Can be prevented.

[0021]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. The same components as those of the above-mentioned conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the voltage detecting means 15 detects the voltage of the capacitor 14 for advancing the phase of the motor 5, and is connected to both ends of the capacitor 14 (it is possible to detect even one of the capacitors), and DC The converted output is input to the control means 16. The bidirectional thyristor 17 is a control means 1.
The operation of the motor 5 is controlled by the output of 6.

The control means 16 stops the operation of the motor 5 on the basis of the change in the output of the voltage detection means 15, notifies the abnormality by the number of detections temporarily stopped by the idling of the cleaning pump 4, and further detects the number of detections. Therefore, the cleaning time is added.

The operation of the above structure will be described with reference to FIGS. 3 and 4. In step 21 of FIG. 3, the motor 5 is driven to operate the cleaning pump 4 to operate the cleaning nozzle 3
The cleaning water is sprayed from to spray the cleaning water. When the residual food filter 12 is clogged with the residual food during the injection and air enters the cleaning pump 4, the cleaning pump 4 spins idle due to the amount of the air, and the water is not injected. Therefore, the load on the motor 5 is lightened, and the voltage of the phase advancing capacitor 14 changes from V1 to V2 and becomes higher, as shown in FIG. This voltage is detected by the voltage detecting means 15, and it is determined whether or not the change in the voltage detected in step 22 is large, and if it is large, the motor 5 is temporarily stopped in step 23. As a result, the air that has entered the cleaning pump 4 can be discharged to the outside and jetted.

Next, if a predetermined time (for example, 20 seconds) has elapsed in step 24 and the number of temporary stops in step 25 is not more than the predetermined number (4 times), the process returns to step 21 to drive the motor 5 and wash it. The pump 4 is operated and the cleaning water is sprayed from the cleaning nozzle 3 to spray the cleaning water. If the number of temporary stops in step 25 is equal to or greater than the predetermined number (4 times), in step 26, the load is stopped and the abnormality is informed to inform the user of the abnormality.

Next, if the change in voltage detected in step 22 is not large, the number of temporary stops is detected in steps 27 and 28. If the number of temporary stop is not one or more in step 27, the process proceeds to step 29, and the operation is continued until the cleaning set time. Pause 2 at step 28
If it is twice, one minute is added to the set cleaning time in step 30, and if it is two times or more, four minutes is added in step 31.
As a result, when residual foods are collected in the residual food filter 12, it is possible to compensate for the decrease in the injection amount of the cleaning water and prevent the deterioration of the cleaning performance.

Next, a second embodiment of the present invention will be described. The control means 16 in FIG.
The abnormality is determined based on the detection cycle and the number of times, that is, the cycle and the number of temporary stoppages due to the idling of the cleaning pump 4. The other structure is the same as that of the first embodiment.

The operation of the above configuration will be described with reference to FIG. Since the steps 21 to 24 are the same as the operation of the first embodiment, the description thereof will be omitted.

In steps 32 and 33, the voltage detecting means 1
5, the idling of the cleaning pump 4 is detected, and the cycle and the number of times of temporary stop are determined. If the cycle of the temporary stop is within 1 minute and the number of times of detection is 2 or more, it is judged as abnormal, and in step 34. Report an abnormality.

Next, in steps 35 and 36, when the temporary stop period is within 5 minutes and the number of times of detection is 4 times or more, it is judged as abnormal, and the abnormality is notified in step 34. Also,
If the pause period is 5 minutes or more in step 35, the process proceeds to step 37, and if the number of pauses is 8 or more,
In step 34, the load is stopped and the abnormality is notified to notify the user. Otherwise, by operating the washing pump 4 and injecting washing water, it is possible to make a judgment of abnormality detection.

[0031]

As described above, according to the present invention, the motor for driving the cleaning pump for injecting the cleaning water in the cleaning tank, the voltage detecting means for detecting the voltage of the phase advancing capacitor of the motor, and the tableware Cleaning, rinsing, and a control means for sequentially controlling a series of steps of drying, and the control means is configured to stop the operation of the motor based on a change in the output of the voltage detection means. The output can detect idling of the washing pump due to air entering the washing pump, and when the washing pump is idling, the operation is temporarily stopped and the entered air is discharged to the outside, and the idling of the washing pump is prevented. Can be prevented.

Further, since the control means determines the abnormality based on the detection cycle and the number of times of the voltage detection means, it is possible to determine the abnormality based on the detection cycle and the number of times that the cleaning pump is temporarily stopped due to idling. it can.

Further, a motor for driving a cleaning pump for injecting cleaning water in the cleaning tank, a voltage detecting means for detecting a voltage of a phase advancing capacitor of the motor, and cleaning of dishes.
A control means for sequentially controlling a series of rinsing and drying steps is provided, and the control means is configured to notify the abnormality by the number of detections of the voltage detection means. The user can be notified.

Further, a motor for driving a cleaning pump for injecting cleaning water in the cleaning tank, a voltage detecting means for detecting a voltage of a phase advancing capacitor of the motor, and cleaning of dishes.
A control means for sequentially controlling a series of steps of rinsing and drying is provided, and since the control means is configured to add the cleaning time depending on the number of times of detection by the voltage detection means, cleaning with the residual food clogged in the residual food filter. It is possible to prevent the deterioration of the cleaning performance due to the decrease of the injection amount of water.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a dishwasher according to a first embodiment of the present invention.

[Fig. 2] Circuit diagram of essential parts of the dishwasher

FIG. 3 is a flowchart showing idle rotation detection of the washing pump of the dishwasher.

FIG. 4 is a voltage waveform diagram of the phase-advancing capacitor of the dishwasher motor.

FIG. 5 is a flowchart showing idle rotation detection of the washing pump of the dishwasher according to the second embodiment of the present invention.

[Fig. 6] System configuration diagram of a conventional dishwasher

[Explanation of symbols]

 1 Cleaning Tank 4 Cleaning Pump 5 Motor 14 Phase Advance Capacitor 15 Voltage Detection Means 16 Control Means

Front Page Continuation (72) Inventor Wataru Hamaguchi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Takashi Miyauchi, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A motor for driving a cleaning pump for injecting cleaning water in a cleaning tank, a voltage detecting means for detecting a voltage of a phase advancing capacitor of the motor, and a series of cleaning, rinsing and drying of dishes. And a control means for sequentially controlling the stroke, wherein the control means stops the operation of the motor based on a change in the output of the voltage detection means. 2. The dishwasher according to claim 1, wherein the control means determines the abnormality by the detection cycle or the number of times of the voltage detection means. 3. A motor for driving a cleaning pump for injecting cleaning water in a cleaning tank, a voltage detecting means for detecting a voltage of a phase advancing capacitor of the motor, and a series of cleaning, rinsing and drying of dishes. A dishwasher comprising: a control unit for sequentially controlling the stroke, wherein the control unit reports an abnormality based on the number of detections of the voltage detection unit. 4. A motor for driving a cleaning pump for injecting cleaning water in a cleaning tank, a voltage detecting means for detecting a voltage of a phase advancing capacitor of the motor, and a series of cleaning, rinsing and drying of dishes. A dishwasher comprising: a control unit for sequentially controlling the stroke, wherein the control unit adds the washing time depending on the number of detections of the voltage detection unit.