JPH07100089A - dishwasher - Google Patents

Abstract

(57) [Summary] [Purpose] In a dishwasher that sprays washing water onto the dishes stored in the washing tank to wash the dishes, the remaining time is displayed according to the fluctuation of the power supply voltage and the actual operating time is displayed. The purpose is to reduce the error. [Structure] The washing water in the washing tank 1 is sprayed from a washing nozzle 3 toward the tableware 2, and the temperature of the washing water is detected by a thermistor 8 while heating the washing water in the washing tank 1 by a heater 7. The control means 17 for controlling a series of sequential operations of the washing, rinsing and drying steps of the tableware 2 displays the remaining time of the operation according to the voltage value obtained by the voltage detection means 16 for detecting the power supply voltage, as the remaining time display means 16. To be displayed.

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, even in a dishwasher, there has been proposed a device for displaying the remaining operation time by using a display unit for displaying numbers.

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

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 1 and spouts washing water toward the tableware 2. The cleaning pump 4 sends cleaning water to the cleaning nozzle 3 and is driven by a motor 5. The water level sensor 6 detects the water level in the cleaning tank 1 and outputs it as an electric signal. The heater (heating means) 7 is arranged at the bottom of the cleaning tank 1 to heat the cleaning water. The thermistor (temperature detection means) 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. Blower fan 9
Is for sending out the vapor in the cleaning tank 1, and is discharged from the exhaust port 10 to the outside of the machine. The dish basket 11 is arranged in the cleaning tank 1, and the tableware 2 is arranged therein.

The control means 12 controls a series of sequential operations of washing, rinsing and drying the dishes 2. The drainage pump 13 drains the water in the cleaning 1. Water valve 1
4 supplies water into the cleaning tank 1. The remaining time display means 15 receives the output of the control means 12 and displays the remaining time of operation by digital number display.

To explain the operation of the above configuration, when the user places the dishes 2 in the dish basket 11 and stores them in the washing tub 1 and puts the detergent into it and starts the operation, first, the water level at the bottom of the washing tub 1 is set. A predetermined amount of tap water is supplied from the water supply valve 14 until the sensor 6 detects a predetermined water level. At that time, the remaining time display means 15 displays the time required until the end of the sequence, and counts down with the passage of time.

Then, the washing pump 4 and the heater 7 are energized and the washing water is jetted from the washing nozzle 3 toward the tableware 2 while being heated. At this time, the temperature of the wash water is detected by the thermistor 8, and the control means 12 always grasps the temperature of the wash water. When the temperature of the cleaning water reaches a predetermined temperature and a predetermined time has elapsed from the start of cleaning, the control means 12 ends the cleaning process and operates the drainage pump 13 to drain the cleaning water once.

Next, tap water is newly supplied, and the same operation as the above-described washing step is performed for several minutes to drain the water. After this rinsing step is repeated several times, the same operation as a washing step called a heat rinsing step is performed, and when the predetermined temperature is reached, the operation is finished 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. When the above sequence ends,
The display of the remaining time display means 15 is zero.

[0009]

In such a conventional dishwasher, the time displayed on the remaining time display means 15 is
Generally, it is displayed in one kind of pattern set in advance, and the ability of the heater 7 fluctuates due to the fluctuation of the power supply voltage, and the time for the temperature of the cleaning water to reach the predetermined temperature fluctuates. Even if the operating time of No. 1 fluctuates, there is a problem that the error is increased because the display is not performed for a certain period of time.

SUMMARY OF THE INVENTION The first object of the present invention is to solve the above problems and to display the remaining time according to the fluctuation of the power supply voltage to reduce the error from the actual operating time.

A second object is to make the remaining time display as stable as possible and reduce the error from the actual operating time even when the detected variations in the power supply voltage are large.

In addition, under various operating conditions, even when the detected power supply voltage is greatly different from that in the standard state, a stable remaining time display is displayed to reduce the error from the actual operating time. The purpose is.

A fourth object is to display a stable remaining time even when the detected power supply voltage deviates largely from that in the standard state due to a failure of the voltage detection means or a reading error of the control means. I am trying.

[0014]

In order to achieve the first object of the present invention, a washing tank for storing dishes and a washing nozzle for injecting the washing water in the washing tank toward the dishes are provided. A cleaning pump that feeds the cleaning water stored in the cleaning tank to a cleaning nozzle, a motor that drives the cleaning pump, a heating unit that heats the cleaning water in the cleaning tank, and the cleaning water in the cleaning tank. Temperature detection means for detecting water temperature, control means for controlling a series of sequential operations of washing, rinsing and drying steps of the tableware, voltage detection means for detecting power supply voltage, and rest of operation connected to the control means. A remaining time display means for displaying the time, wherein the control means displays the remaining time of the operation corresponding to the voltage value obtained by the voltage detection means on the remaining time display means. It is used as a means for solving problems

In order to achieve the second object, in addition to the first problem solving means, a storage means for storing the voltage value obtained by the voltage detection means is provided, and the control means is provided by the storage means. The second is that the voltage value with the highest detection rate or the average value of the voltage values obtained in the past is set as the true voltage value, and the remaining time of operation corresponding to this voltage value is displayed on the remaining time display means. It is used as a means for solving problems.

In order to achieve the third object, in addition to the first problem solving means, a storage means for storing the voltage value obtained by the voltage detection means is provided, and the control means is provided by the voltage detection means. When the obtained voltage value exceeds the preset range, the previously obtained voltage value stored in the storage means is used and the remaining time of the operation corresponding to this voltage value is displayed on the remaining time display means. This is the third means for solving the problems.

Further, in order to achieve the fourth object, when the voltage value obtained by the voltage detection means exceeds a preset range, the control means displays the unique remaining time of the operation on the remaining time display means. This is the fourth means for solving the problem.

[0018]

According to the first means for solving the above problems, the present invention provides:
By estimating the operating time according to the level of the power supply voltage obtained by the voltage detecting means and displaying it on the remaining time display means, it is possible to reduce the error from the actual operating time.

In the case where the detected power source voltage has a large variation, the second problem solving means stores the past voltage value using the storage means and obtains the most frequent value or the average value. Moreover, it is possible to display the remaining time display as stable as possible and reduce the error from the actual operating time.

According to the third problem solving means, when the detected voltage value deviates largely from the standard value, the detected value at that time is not adopted but stored in the storage means. By adopting the past voltage value and displaying the remaining time according to that value, even if the detected power supply voltage is significantly different from that in the standard state under various operating conditions, the actual operating time The error can be reduced.

Further, according to the fourth problem solving means, when the detected voltage value deviates greatly from the standard value, the detected value at that time is not adopted and a predetermined unique operation is performed. By displaying the remaining time on the remaining time display means, the practicality is impaired even if the detected power supply voltage deviates largely from the standard state due to a failure of the voltage detection means or a reading error of the control means. There is no remaining time display.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the voltage detection means 16 detects the power supply voltage. The control means 17 comprises a microcomputer or the like, inputs signals from each detection means and operates each load to control a series of sequential operations of the washing, rinsing and drying steps of the tableware 2, and the voltage detection means 16 The remaining time of the operation according to the voltage value obtained by the above is displayed on the remaining time display means 15.

The operation of the above configuration will be described with reference to FIG.
When water is stored in the cleaning tank 1 by the water supply valve 14 and the cleaning pump 4 is operated to start the cleaning process, the thermistor (temperature detecting means) 8 is set at the set temperature as shown in FIG. The heater (heating means) 7 is energized until the temperature of 60 ° C. is detected, and when the set time elapses thereafter, the cleaning process ends, the draining process and the water supplying process are performed, and then the rinsing process is performed. In the rinse step, the cleaning pump 4 operates in the same manner as in the cleaning step, and the thermistor 8 moves to the set temperature 7 as shown in FIG.
The heater 7 is energized until 0 ° C. is detected, and after that, when the set time elapses, the rinsing process ends, the drainage process is performed, and then the drying process is performed. In the drying process, as shown in FIG. 2, the heater 7 is energized until the thermistor 8 detects the set temperature of 80 ° C., and when the set time elapses thereafter, all the sequences are finished.

At this time, the remaining time display means 15 displays the time required from the start of the sequence to the end. On the other hand, for example, in the cleaning process, the time until the temperature of the cleaning water in the cleaning tank 1 reaches the set temperature T (60 ° C.) is affected by the level of the power supply voltage. That is,
Curve a in FIG. 3 shows the case of standard (rated) voltage at the set temperature T
However, when the power supply voltage is high, the set temperature T is reached at a time t2 shorter than the time t1 as shown by the curve b.
To reach. When the power supply voltage is low, as shown by the curve c, the set temperature T is reached at a time t3 longer than the time t1.

As described above, since the required time varies depending on the level of the power supply voltage, the error between the actual operating time and the display time of the remaining time display means 15 becomes large, impairing the practicality. I will end up. Therefore, the voltage detection means 16
The power supply voltage is detected at the start of the sequence by the control means 17, and the control means 17 calculates the required time until the end according to the value. When the power supply voltage is standard, the standard remaining time is displayed on the remaining time display means 15. When the power supply voltage is high, the remaining time display means 15 displays a short remaining time, and when the power supply voltage is low, the remaining time display means 15 displays a long remaining time. The error from the operating time can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the storage means 18 stores the voltage value obtained by the voltage detection means 16. Control means 1
Reference numeral 9 sets a voltage value having the highest detection rate by the storage means 18 or an average value of voltage values obtained in the past as a true voltage value, and displays the remaining time of the operation corresponding to the voltage value on the remaining time display means 15. I am trying.

The operation of the above configuration will be described with reference to FIG. 5. First, the storage means 18 of FIG. 4 stores past power supply voltage data, for example, the detection frequency for each voltage value or the average of past voltage values. Remember the value. Then, the routine proceeds to the power supply voltage detection routine of step 20 shown in FIG. 5, and whether the voltage detected by the voltage detection means 16 in step 21 is within a preset range (85 to 115 volts in the case of 100 volt equipment). Determine whether

If the detected voltage is within the set range, the process proceeds to step 22, and the value detected this time and the storage means 1 are stored.
The value of 8 is also referred to, and the value with the highest detection frequency is selected or the average value is calculated in step 23 to determine the voltage value to be adopted this time. Next, in step 24, the remaining time according to the determined voltage value is calculated according to a predetermined rule, and at the same time, the current voltage value is stored in the storage means 18 for future reference. And
The remaining time calculated in step 25 is displayed as the remaining time display means 1.
Display in 5.

As a result, the stable remaining time can be displayed on the remaining time display means 15 even when the detected variations in the power supply voltage are large, and the error from the actual operating time can be reduced.

Next, a third embodiment of the present invention will be described. The control means 19 in FIG.
If the voltage value obtained by exceeds the preset range,
The voltage value obtained in the past stored in the storage means 18 is used, and the remaining time of the operation corresponding to this voltage value is displayed on the remaining time display means 15. The other structure is the same as that of the second embodiment.

The operation of the above configuration will be described with reference to FIG. 5. When it is determined in step 21 that the voltage detected by the voltage detecting means 16 is not within the preset range, the data that is out of order is used as the basis. If the remaining time is calculated, the difference from the standard state becomes too large, and the practicality is rather impaired. Therefore, the process proceeds to step 26, and the missed data of this time is ignored and stored in the storage unit 18, The calculated voltage value is called, this value is also adopted this time, and then, in step 24, the remaining time according to the adopted voltage value is calculated by a predetermined rule, and at the same time, the current voltage value is stored. The remaining time stored in the means 18 and calculated in step 25 is displayed on the remaining time display means 15.

As a result, even when the detected power supply voltage is greatly different from that in the standard state under various use conditions, the error from the actual operating time can be minimized.

Next, a fourth embodiment of the present invention will be described. The control means 19 in FIG.
If the voltage value obtained by exceeds the preset range,
The remaining time of the unique operation is displayed on the remaining time display means 15. The other structure is the same as that of the second embodiment.

The operation of the above configuration will be described with reference to FIG. Note that the operation from step 20 to step 25 is the same as the operation of the second embodiment described above, so description thereof will be omitted.

When it is determined in step 21 that the voltage detected by the voltage detecting means 16 is not within the preset range, the voltage value detected this time is detected by the voltage detecting means 16 or the control means 17 as a failure or a detection. You can think that there may have been a mistake. At this time, step 27
Go to and uniquely determine the voltage value with a predetermined value,
Next, in step 24, the remaining time according to the adopted voltage value is calculated according to a predetermined rule, at the same time, the current voltage value is stored in the storage means 18, and the remaining time calculated in step 25 is calculated. It is displayed on the remaining time display means 15.

As a result, the remaining time can be displayed without impairing the practicality.

[0039]

As is apparent from the above embodiments, according to the present invention, a cleaning tank for storing dishes, a cleaning nozzle for spraying the cleaning water in the cleaning tank toward the dishes, and the cleaning A cleaning pump that feeds the cleaning water accumulated in the tank to the cleaning nozzle, a motor that drives the cleaning pump, a heating unit that heats the cleaning water in the cleaning tank, and a temperature of the cleaning water in the cleaning tank. Temperature detecting means, control means for controlling a series of sequential operations of washing, rinsing and drying steps of the tableware, a voltage detecting means for detecting a power supply voltage, and a remaining operating time connected to the control means. The remaining time display means for displaying the remaining time of the operation corresponding to the voltage value obtained by the voltage detection means on the remaining time display means. By time display means It is possible to reduce the error between Shimesuru remaining time.

Further, the control means is provided with a storage means for storing the voltage value obtained by the voltage detection means, and the control means obtains the true voltage by the voltage value having the highest detection degree by the storage means or the average value of the voltage values obtained in the past. As the value, the remaining time of operation according to this voltage value is displayed on the remaining time display means,
Even when there is a large variation in the detected power supply voltage, a stable remaining time can be displayed, the error between the actual operating time and the remaining time displayed by the remaining time display means can be reduced, and reliability can be improved.

Further, the control means is provided with a storage means for storing the voltage value obtained by the voltage detection means. When the voltage value obtained by the voltage detection means exceeds a preset range, the control means stores it in the storage means. Since the voltage value obtained in the past was used and the remaining time of operation according to this voltage value was displayed on the remaining time display means, the detected power supply voltage was larger than that in the standard state under various operating conditions. Even in a different case, it is possible to reduce the error between the actual operating time and the remaining time displayed by the remaining time display means.

Further, when the voltage value obtained by the voltage detection means exceeds the preset range, the control means displays the unique remaining time of the operation on the remaining time display means. Even when the detected power supply voltage deviates greatly from that in the standard state due to a failure, a reading error of the control means, or the like, a stable remaining time can be displayed.

[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 is a chart showing an operation sequence of the dishwasher.

FIG. 3 is a diagram showing the relationship between the temperature of washing water of the dishwasher and time.

FIG. 4 is a system configuration diagram of a dishwasher according to a second embodiment of the present invention.

FIG. 5 is an operation flowchart of main parts of the dishwasher and the dishwasher according to the third embodiment of the present invention.

FIG. 6 is an operation flowchart of essential parts of a dishwasher according to a fourth embodiment of the present invention.

[Fig. 7] System configuration diagram of a conventional dishwasher

[Explanation of symbols]

 1 Cleaning Tank 2 Tableware 3 Cleaning Nozzle 4 Cleaning Pump 5 Motor 7 Heater (Heating Means) 8 Thermistor (Temperature Detection Means) 13 Drain Pump 15 Remaining Time Display Means 16 Voltage Detection Means 17 Control Means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Wataru Uchiyama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A washing tank for storing dishes, a washing nozzle for spraying the washing water in the washing tank toward the dishes, and a washing pump for feeding the washing water accumulated in the washing tank to the washing nozzle. A motor for driving the cleaning pump, heating means for heating the cleaning water in the cleaning tank, temperature detecting means for detecting the temperature of the cleaning water in the cleaning tank, cleaning, rinsing and drying of the dishes Control means for controlling a series of sequential operations of the stroke, voltage detection means for detecting the power supply voltage, and remaining time display means connected to the control means for displaying the remaining time of operation, the control means, A dishwasher in which the remaining time of operation according to the voltage value obtained by the voltage detection means is displayed on the remaining time display means. 2. A storage means for storing the voltage value obtained by the voltage detection means, wherein the control means has a true voltage as a voltage value having the highest detection degree by the storage means or an average value of the voltage values obtained in the past. 2. The dishwasher according to claim 1, wherein the remaining time of operation according to the voltage value is displayed on the remaining time display means. 3. A storage means for storing the voltage value obtained by the voltage detection means, wherein the control means stores the voltage value obtained by the voltage detection means in the storage means when the voltage value exceeds a preset range. Using the voltage value obtained in the past,
The dishwasher according to claim 1, wherein the remaining time of operation according to the voltage value is displayed on the remaining time display means. 4. The dishwasher according to claim 1, wherein the control means displays the remaining time of unique operation on the remaining time display means when the voltage value obtained by the voltage detection means exceeds a preset range. Machine.