JP3239554B2 - 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 washing dishes by injecting washing water into dishes stored in a washing tank.

[0002]

2. Description of the Related Art In recent years, dishwashers equipped with programs such as washing, rinsing and drying have become mainstream.

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

[0004] As shown in the figure, a washing tank 1 stores tableware 2 therein and stores washing water at the bottom. Cleaning nozzle 3
Is rotatably supported in the washing tank 1 and jets washing water toward the tableware 2. The cleaning pump 4 sends cleaning water to the cleaning nozzle 3, and the cleaning pump 4
Driven by Water level sensor (water level detecting means) 6
Detects the water level in the washing tank 1 and outputs it as an electric signal. The heater 7 is provided at the bottom of the cleaning tank 1 and heats cleaning 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 steam in the cleaning tank 1 and is discharged from the exhaust port 10 to the outside of the machine. In addition, 11
A tableware basket in which the tableware 2 is arranged, and 12 is a water supply valve (water supply means) for supplying tap water to the washing tank 1. The control means 13
A series of sequential operations of the washing, rinsing, and drying processes of the tableware 2 are controlled.

The operation of the above arrangement will be described. When the user places the dishes 2 in the dish basket 11 and stores it in the washing tank 1 and starts the operation after putting the detergent therein, first, the water level is set at the bottom of the washing tank 1. Tap water is supplied by the water supply valve 12 until the sensor 6 detects a predetermined water level. Then, the motor 5 and the heater 7 are energized, and the cleaning water is spouted from the cleaning nozzle 3 toward the tableware 2 by the cleaning pump 4 while being heated. At this time, the temperature of the washing water is detected by the thermistor 8, and the control means 13 keeps track of the temperature of the washing water.

The temperature of the washing water reaches a predetermined temperature, and
When a predetermined time has elapsed from the start of the 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 in the above-described washing step is performed for several minutes to drain water. After repeating this rinsing step several times, the same operation as the cleaning step called a heating rinsing step is performed, and when the temperature reaches a predetermined temperature, this is completed and drained. Finally, the blower fan 9 is operated to discharge the steam in the washing tank 1 to the outside of the machine, and at the same time, the heater 7 is intermittently energized, and the dishes 2
Is heated to dry the adhering water droplets.

Here, a method of detecting a water supply failure in the water supply process will be described with reference to FIG. When the water supply process is started, tap water is supplied into the cleaning tank by the water supply valve 12 and the water supply time is started to be measured by the timer in step 16 of FIG. 8, and the measured time of the timer is set to the predetermined time in step 17. If not, after the water is supplied until the predetermined water level is detected by the water level sensor 6 in step 19, the water supply process ends, but during the water supply process, the water tap is closed,
If the water supply time is extremely long compared to the normal water supply time due to factors such as clogging of the water supply path, the timer measurement time in Step 17 exceeds the predetermined time set in advance.
In step 18, a water supply failure is detected and reported.

[0008]

However, in the above-mentioned conventional dishwasher, the limit time for judging a poor water supply in step 17 of FIG. 8 is determined to a unique value based on the time required for the water supply process in a standard state. Therefore, for example, under a condition where the amount of water supply is smaller than the amount of water supply per unit time in the standard state, the time difference between the time required for the water supply process even in the normal state and the limit time for judging poor water supply is small. Since there is no allowance, if the amount of water supply per unit time becomes small even a little, there is a problem that a water supply failure is often detected.

[0009] The present invention solves the above-mentioned problems, and in various environments in which a dishwasher is installed, it is possible to eliminate water supply failure with a uniform standard without being affected by variations in water supply amount per unit time. It is a first object of the present invention to determine a limit time for determination, stably detect a water supply failure, and notify the user of the failure.

In addition, even when the amount of water supply per unit time is large and therefore the time required for the water supply process exceeds a preset range, the time limit for judging water supply failure with a uniform standard is set. A second object is to make a decision, stably detect a water supply failure, and notify the user of the failure.

In addition, even when the amount of water supply per unit time is large and the time required for the water supply process greatly exceeds a preset range, a water supply failure can be properly detected and reported. Is a third object.

[0012] In addition, even if the amount of water supply per unit time is likely to decrease due to impurities adhering to the water supply path (in the water pipe) due to aging, it is determined that there is a poor water supply with a uniform standard. Determine the time limit for
A fourth object is to stably detect poor water supply and notify the user of this.

Further, in a dishwasher that has just been installed, the time required for the past water supply process cannot be known stably, and therefore, the time limit for judging water supply failure with a uniform standard is determined. A fifth object is to appropriately detect a water supply failure even when the water supply cannot be performed, and to notify the user of the failure.

[0014]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a washing tank for accommodating tableware, water supply means for supplying tap water into the washing tank, Water level detecting means for detecting the water level of the washing water, control means for controlling a series of sequential operations of the washing, rinsing, and drying steps of the dishes, and until the water level detecting means detects a predetermined water level after the start of the water supply step. Storage means for storing the time required for the control means, the control means as the true water supply time the time of the highest detection degree stored in the storage means or the average value of the time measured in the past, based on this time The first problem solving means is that when water is supplied beyond the obtained time limit, a water supply failure is detected and notified.

Further, in order to achieve the second object, the control means of the first means for solving the above-mentioned problems may be arranged such that the time required until the predetermined water level is detected by the water level detection means exceeds a predetermined range. Using the previously measured time previously stored in the storage means, when water supply is performed beyond the time limit obtained based on this time, the water supply failure is detected and notified. This is the second problem solving means.

In order to achieve the third object, the control means of the first means for solving the above problems may be arranged so that the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range. The third problem-solving means is that the time required for the water supply process is uniquely determined, and when water supply is performed beyond the limit time obtained based on this time, water supply failure is detected and notified. I have.

In order to achieve the fourth object, in addition to the first means for solving the above problems, there is provided storage means for storing the number of times of operation, which is the number of times the dishwasher has been used in the past, and the control means comprises: If the number of times of operation exceeds a predetermined number of times set in advance, if water is supplied beyond the time limit obtained based on this time using the previously measured time previously stored in the storage means, a water supply failure A fourth problem solving means is to detect and notify the user.

Further, in order to achieve the fifth object, in addition to the above-mentioned first means for solving the problems, there is provided storage means for storing the number of times the dishwasher has been used in the past,
The control means stores the time required for the water level detection means to detect the predetermined water level in the storage means when the number of times of operation is less than the predetermined number of times set in advance, and the time required for the water supply process uniquely determined. The fifth problem-solving means is that when water supply is performed beyond the time limit obtained based on the above, a water supply failure is detected and notified.

[0019]

According to the first aspect of the present invention, there is provided:
The actual time required to detect the predetermined water level by the water level detection means at the time of water supply (actual water supply time) is known, and this time is stored in the storage means for each predetermined time, and this is used to detect the most in the past. The time of high degree or the average value of the times measured in the past is taken as the true water supply time, and the time limit for detecting the poor water supply is determined using this time. At this time, the margin of the time limit for detecting water supply failure with respect to the time required for the water supply process can be treated the same as that in the standard condition, so that it is not affected by the variation of the water supply amount per unit time, The time limit for judging poor water supply can be determined with the help of, and the poor water supply can be stably detected and reported.

Further, by means of the second problem solving means, the time actually required (actual water supply time) until the predetermined water level is detected by the water level detecting means at the time of water supply is known, and this time is stored in the storage means at predetermined time intervals. If the time exceeds a predetermined range set in advance, the time beyond the predetermined range is not stored. The present water supply time can be obtained by using the previously measured water supply time that has been held in advance, and this time is used to determine the time limit for detecting a poor water supply. In this way, even when the amount of water supply per unit time varies greatly, the time limit for judging water supply failure is determined with a uniform standard, and the water supply failure is detected stably and reported. Can be.

Further, by means of the third problem solving means, a time (actual water supply time) actually required until a predetermined water level is detected by the water level detecting means at the time of water supply is known, and this time is set in a predetermined range. , The time required for the water supply process can be uniquely determined, and this can be used to appropriately detect a water supply failure and to notify the user.

According to the fourth problem solving means, the actual time required for detecting the predetermined water level by the water level detecting means at the time of water supply (actual water supply time) is known. This time is stored in the storage means every predetermined time, and this time is not stored when the number of times of operation exceeds a preset number.

When calculating the time limit for detecting a water supply failure after the next time, the water supply time measured in the past, which is stored in the storage means in advance, is used to measure the time of the highest degree of detection in the past or in the past. By using the average value of the time as the true water supply time and using this time to determine the time limit for detecting poor water supply, water supply can be performed with a uniform standard without being affected by variations in water supply per unit time. When the limit time for judging the failure is determined and the water supply failure is detected stably, and when the water is used beyond the specified number of operations, the limit time is fixed. It is possible to appropriately detect a decrease in water supply capacity that can occur due to the attachment of impurities as a water supply failure.

Further, by means of the fifth problem solving means, a time (actual water supply time) actually required until a predetermined water level is detected by the water level detecting means at the time of water supply is known, and this time is stored in the storage means for each predetermined time. However, if the number of times of operation exceeds a preset number of times when calculating the limit time for detecting a water supply failure after the next time, the water supply time measured in the past, which is stored in the storage means in advance, is the most used in the past. The average value of the high detection time or the time measured in the past is taken as the true water supply time, and if the number of operations is less than the preset number, the water supply time is determined uniquely and the water supply failure is detected using this time By determining the time limit for water supply, even if the time required for past water supply processes in a dishwasher that has just been installed cannot be known stably, It is possible to detect the, so as to notify it.

[0025]

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 above-described conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in the figure, the control means 14 controls a series of sequential operations of washing, rinsing and drying steps of the dishes 2 and further detects a predetermined water level by a water level sensor (water level detecting means) 6 at the time of water supply. The actual time required to perform the measurement (actual water supply time) is measured, and this time is stored in the storage means 15, and using this, the time of the highest detection degree in the past or the average of the times measured in the past is used. The value is taken as the true water supply time, and the time limit for detecting water supply failure is calculated using this time.If water supply is performed beyond this time limit,
Water supply failure is detected and reported.

Although not shown, the water level sensor 6 has a magnetic material attached to a diaphragm responsive to pressure,
The magnetic material is provided opposite to the coil so that the inductance of the coil is increased by externally applied pressure, and the coil is connected to an oscillation circuit. Therefore, when water is supplied into the cleaning tank 1, the pressure applied to the water level sensor 6 increases, the oscillation frequency decreases, and water is supplied until a predetermined water level frequency indicating a predetermined water level is detected.

The operation of the above configuration will be described with reference to FIG. The sequential operation of the washing, rinsing, and drying steps of the tableware 2 by the control means 14 is the same as in the conventional example, and the description thereof is omitted, and the water supply failure is not affected by the variation of the water supply amount per unit time. The means for calculating the time limit for determining the time will be described.

When the water supply process starts, step 1 in FIG.
At step 20, measurement of the time required for the water supply process is started by the timer, and at step 20, the previously stored water supply time is set to t1.
, And a limit time t2 for detecting a water supply failure is calculated by the following equation in step 21.

T2 = t1 × a where a is a constant. If the timer measurement time has not exceeded the limit time t2 in step 17, water is supplied until the water level sensor 6 detects a predetermined water level in step 19, and then in step 22, the time actually required for the current water supply process. At step 23, the average value tave of the previously stored time is called at step 23. At step 24, the average value tave of the time is newly calculated based on the average value tave of this time and the time t1 measured at step 22. Calculate, step 2
In step 5, the current time t1 is set as the average value tave, and in step 26, the time t1 is stored in the storage means 15, and the water supply process is terminated. On the other hand, if the timer measurement time has exceeded the limit time t2 in step 17, a poor water supply is detected in step 18 and an abnormality is notified.

Thus, in the installation environment of each dishwasher, the time limit for detecting the water supply failure with respect to the time required for the water supply process can be treated in the same manner as in the standard state, that is, the variation in the water supply amount per unit time can be reduced. Without being affected, it is possible to determine the time limit for judging a poor water supply with a uniform reference, stably detect the poor water supply, and report the same.

In the above embodiment, the timing for calling the stored previous time value and the timing and number for calculating the average value are specifically shown, but this particularly affects the variation in the water supply amount per unit time. The means for calculating the time limit for detecting the water supply failure without receiving the error is not limited.

Next, a description will be given of a second embodiment of the present invention. The control means 14 in FIG. 1 knows the time actually required (actual water supply time) until the water level sensor 6 detects a predetermined water level at the time of water supply. This time is stored in the storage means 15 for each predetermined time, and when this time exceeds a predetermined range set in advance, the time beyond the predetermined range is not stored, and the water supply failure after the next time is performed. When determining the time limit for detecting the water supply time, the current water supply time is obtained by using the previously measured water supply time previously stored in the storage means 15, and the time limit for detecting the water supply failure using this time is determined. If water is supplied beyond this time limit, water supply failure is detected and reported. Other configurations are the same as those of the first embodiment.

The operation of the above configuration will be described with reference to FIG. Steps 16 to 22 in FIG. 3 are the same as in the first embodiment, and a description thereof will be omitted. However, the constant b in step 21 may be the same as the constant a in the first embodiment.

At step 22, the timer measurement time t1 is known, and at steps 27 and 28, the time t1 is within a predetermined range (c <t1 <d, where c and d are constants and c <d
If the value of d) is to be taken, the measurement time t1 is set in step 26.
Is stored in the storage means 15 and the water supply process is terminated. Also,
In steps 27 and 28, the time t1 is out of the predetermined range (t1
When the value of <c or d <t1, where c and d are constants), the value stored in the storage means 15 is left as it is, and the water supply process is terminated.

Thus, even when the amount of water supply per unit time varies greatly, the time limit for judging water supply failure is determined based on a uniform standard, and the water supply failure is detected stably and reported. Can be

Next, a third embodiment of the present invention will be described. The control means 14 in FIG. 1 knows the time (actual water supply time) actually required until the predetermined water level is detected by the water level sensor 6 at the time of water supply, and when this time greatly exceeds a predetermined range set in advance, The time required for the water supply process is uniquely determined, and if water supply is performed beyond the time limit obtained based on this time, water supply failure is appropriately detected and notified. Other configurations are the same as those of the first embodiment.

The operation of the above configuration will be described with reference to FIG. Steps 16 to 22 in FIG. 4 are the same as those in the first embodiment, and a description thereof will be omitted. However, the constant i in step 21 may be the same as the constant a in the first embodiment.

At step 22, the timer measurement time t1 is known, and at steps 29 and 30, the time t1 is within a predetermined range (e <t1 <g, where e and g are constants and e <g
When the value of g) is taken, the measurement time t1 is determined in step 26.
Is stored in the storage means 15 and the water supply process is terminated. Also,
In steps 29 and 30, the time t1 is out of the predetermined range (t1
<E or g <t1, where e and g are constants, in step 31, t1 = h (however,
The time t1 is uniquely determined as (h is a constant), the measured time t1 is stored in the storage means 15 in step 26, and the water supply process ends.

When the time required for the water supply process greatly exceeds a predetermined range set in advance, the time required for the water supply process is uniquely determined and stored.
By using this, it is possible to appropriately detect a poor water supply and to notify the user of this.

Next, a fourth embodiment of the present invention will be described. The storage means 15 in FIG. 1 stores the time (actual water supply time) actually required until a predetermined water level is detected by the water level sensor (water level detection means) 6 at the time of water supply and the number of times the dishwasher has been used in the past. A certain number of operations is stored. The control means 14 knows the actual time required for the water level sensor 6 to detect the predetermined water level at the time of water supply (actual water supply time). If the number of times of operation is stored in the storage means 15 and exceeds the predetermined number of times set in advance, this time is not stored.

When calculating the time limit for detecting a water supply failure after the next time, the water supply time measured in the past, which is stored in the storage means 15 in advance, is used to measure the time with the highest degree of detection in the past or to measure in the past. The average value of the time was taken as the true water supply time, using this time to determine the time limit for detecting poor water supply, if water supply is performed beyond this time limit, detect and inform the poor water supply I have. Other configurations are the same as those of the first embodiment.

The operation of the above configuration will be described with reference to FIG. Steps 16 to 22 in FIG. 5 are the same as those in the first embodiment, and a description thereof will be omitted. However, the constant j in step 21 may be the same as the constant a in the first embodiment.

In step 22, the timer measurement time t1 is known, and in step 32, the previously stored number of operations is called as u. In step 33, if the number of operations u is not more than 50 (predetermined number), the steps from step 23 to step 26
Then, the current time t1 is newly calculated from the average value tave of the time t1 measured this time and the time t1 stored in the past, this is stored, and the water supply process ends. On the other hand, step 33
If the number of operations u exceeds 50, the storage means 1
The water supply process is completed without changing the storage contents of Step 5.

In this way, the time limit for judging water supply failure is determined on a uniform basis without being affected by the variation in water supply amount per unit time, and the water supply failure can be detected stably and the predetermined operation can be performed. If the water supply is used more than the number of times, this time limit is fixed, so that the deterioration of the water supply capacity that can be caused by the impurities adhering to the water supply path (in the water pipe) due to aging is appropriately detected as a poor water supply. be able to.

Next, a fifth embodiment of the present invention will be described. The storage means 15 in FIG. 1 stores the time (actual water supply time) actually required until a predetermined water level is detected by the water level sensor (water level detection means) 6 at the time of water supply and the number of times the dishwasher has been used in the past. A certain number of operations is stored. The control means 14 knows the time actually required until the water level sensor 6 detects the predetermined water level at the time of water supply (actual water supply time), and stores this time in the storage means 15 for each predetermined time.

If the number of times of operation exceeds a predetermined number of times when calculating the limit time for detecting the water supply failure after the next time, the past water supply time previously stored in the storage means 15 is used and the past time is used. The average value of the time of the highest detection degree or the time measured in the past is taken as the true water supply time, and if the number of operations is less than a predetermined number of times, the water supply time is determined uniquely, and this water supply time is determined. Is used to determine the time limit for detecting a water supply failure, and when water supply is performed beyond this time limit, the water supply failure is detected and reported. Other configurations are the same as those of the first embodiment.

The operation of the above configuration will be described with reference to FIG. Steps 17 to 19 and steps 22 to 26 in FIG. 6 are the same as those in the first embodiment, and a description thereof will be omitted.

When the water supply process starts, step 1 in FIG.
At step 6, the timer starts measuring the time required for the water supply process, and at step 20, the previously stored water supply time is set to t1.
Is called in step 34, and the number of operations previously stored is called u in step 34. If the number of operations u is less than 10 (predetermined number) in step 35, step 36
The time t1 is uniquely determined as t1 = k (where k is a constant), and the limit time t2 for detecting a water supply failure is calculated by the following equation at step 37.

T2 = t1 × p where p is a constant and may be the same as the constant a in the first embodiment. On the other hand, when the number of operations u is 10 or more in step 35, the value of the time t1 is left as it is, and in step 37, a limit time t2 for detecting a poor water supply is calculated.

Thus, even if it is not possible to stably know the time required for the past water supply process in a dishwasher that has just been installed, a water supply failure is appropriately detected and notified. can do.

[0052]

As apparent from the above embodiments, according to the present invention, a washing tank for accommodating tableware, water supply means for supplying tap water into the washing tank, and washing water in the washing tank. Water level detection means for detecting the water level of, washing and rinsing of the dishes, control means for controlling a series of sequential operations of the drying process,
Storage means for storing a time required until the water level detection means detects a predetermined water level after the start of the water supply process, and the control means measures the time of the highest detection degree stored in the storage means or in the past The average value of the time is taken as the true water supply time, and if water supply is performed beyond the time limit obtained based on this time, water supply failure is detected and notified, so the water level detection means at the time of water supply sets the predetermined water level. The actual time required for detection (actual water supply time) is known, and this time is stored in the storage means for each predetermined time, and this is used to measure the time with the highest degree of detection in the past or in the past. The average value of the time is taken as the true water supply time, and this time is used to find the time limit for detecting water supply failure.The time limit for detecting water supply failure relative to the time required for the water supply process at this time Since the margin can be treated as equivalent to that in the standard state, it is easy to determine the limit time for judging poor water supply with a uniform standard without being affected by the variation in water supply per unit time. Thus, it is possible to stably detect a poor water supply and notify the user.

When the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range, the control means uses the previously measured time stored in the storage means in advance. If water is supplied beyond the time limit obtained based on this time, water supply failure is detected and reported. Therefore, the actual time required for the water level detection means to detect the predetermined water level at the time of water supply (actually, Water supply time), and this time is stored in the storage means at predetermined time intervals. If this time exceeds a predetermined range set in advance, the time beyond the predetermined range is not stored, and When calculating the limit time for detecting the water supply failure after the next time, the current water supply time can be obtained by using the previously measured water supply time previously stored in the storage means. Determine the limit time to detect the water supply failure using. As a result, even when there is a large variation in the amount of water supply per unit time, it is possible to easily determine the time limit for judging a poor water supply with a uniform standard, stably detect the poor water supply, and report this. can do.

When the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range, the control means determines the time required for the water supply process uniquely and obtains the time based on this time. If water is supplied beyond the specified time limit, water supply failure is detected and reported, so the actual time (actual water supply time) required to detect the predetermined water level by the water level detection means at the time of water supply is known. If this time greatly exceeds a predetermined range set in advance, the time required for the water supply process can be uniquely determined, and the water supply failure can be properly detected and used to notify the user of the time.

Further, there is provided storage means for storing the number of times of operation, which is the number of times the dishwasher has been used in the past, and the control means comprises:
If the number of times of operation exceeds a predetermined number of times set in advance, if water is supplied beyond the time limit obtained based on this time using the previously measured time previously stored in the storage means, a water supply failure Is detected and notified, the actual time required for the water level detection means to detect the predetermined water level at the time of water supply (actual water supply time) is known. Is stored in the storage means at predetermined time intervals, and when the number of times of operation exceeds a preset number, this time is not stored. When calculating the limit time for detecting a water supply failure after the next time, use the previously measured water supply time previously held in the storage means, and use the previously detected water supply time or the average of the previously measured time in the past. By calculating the value as the true water supply time and using this time to determine the time limit for detecting water supply failure,
Without being affected by variations in water supply per unit time,
Determine the time limit for judging poor water supply based on a uniform standard, stably detect poor water supply, and if the water is used beyond the specified number of operations, this time limit is fixed, so water supply will change over time. It is possible to appropriately detect a decrease in the water supply capacity that can occur due to the impurities adhering to the inside of the path (the water pipe) as a poor water supply.

Further, there is provided storage means for storing the number of times of operation, which is the number of times the dishwasher has been used in the past, and the control means, when the number of times of operation is less than a predetermined number of times,
The time required for the water level detection means to detect the predetermined water level is stored in the storage means, and if water supply is performed beyond the time limit obtained based on the time required for the water supply process uniquely determined, water supply failure. Is detected and notified, the actual time required for the water level detection means to detect the predetermined water level at the time of water supply (actual water supply time) is known, and this time is stored in the storage means for each predetermined time, If the number of operations exceeds a preset number of times when calculating the limit time for detecting a water supply failure after the next time, the highest detection degree in the past using the previously measured water supply time previously stored in the storage means. The average value of the high time or the time measured in the past is taken as the true water supply time, and if the number of operations is equal to or less than the preset number, the water supply time is determined uniquely and the water supply failure is determined using this time. By finding the time limit for detection, even if the time required for the past water supply process in the dishwasher that has just been installed cannot be known in a stable manner, a water supply failure is properly detected and reported. can do.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a process of detecting a poor water supply of the dishwasher.

FIG. 3 is a flowchart showing a process of detecting a poor water supply of a dishwasher according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing a process of detecting a poor water supply of a dishwasher according to a third embodiment of the present invention.

FIG. 5 is a flowchart showing a process of detecting a poor water supply of a dishwasher according to a fourth embodiment of the present invention.

FIG. 6 is a flowchart illustrating a process of detecting a poor water supply of a dishwasher according to a fifth embodiment of the present invention.

FIG. 7 is a system configuration diagram of a conventional dishwasher.

FIG. 8 is a flowchart showing a process of detecting a poor water supply of the dishwasher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing tank 2 Tableware 6 Water level sensor (water level detection means) 12 Water supply valve (water supply means) 14 Control means 15 Storage means

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor ▲ Takehito Takahashi 1006 Kadoma, Kazumasa, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Wataru Hamaguchi 1006 Kadoma, Kazuma, Kadoma, Osaka Matsushita Electric (56) References JP-A-63-197429 (JP, A) JP-A-63-107662 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 15 / 42 A47L 15/46 D06F 39/08

Claims (5)

(57) [Claims] 1. A washing tank for accommodating tableware, water supply means for supplying tap water into the washing tank, a water level detecting means for detecting a level of washing water in the washing tank, and washing of the tableware Rinsing, control means for controlling a series of sequential operations of the drying process, and storage means for storing the time required until the water level detection means detects a predetermined water level after the start of the water supply process, the control means, The average value of the time of the highest detection degree stored in the storage means or the time measured in the past is taken as the true water supply time, and if water supply is performed beyond the time limit obtained based on this time, a water supply failure is detected. Dishwasher to alert. 2. The control device according to claim 1, wherein when the time required for detecting the predetermined water level by the water level detection device exceeds a predetermined range, the control device uses the previously measured time stored in the storage device in advance. 2. The dishwasher according to claim 1, wherein when water is supplied beyond a time limit obtained based on the time, a water supply failure is detected and notified. 3. The control means, if the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range set in advance, uniquely determines the time required for the water supply process and obtains the time based on this time. 2. The dishwasher according to claim 1, wherein when water is supplied for a time exceeding the time limit, a water supply failure is detected and notified. 4. A storage device for storing the number of operations, which is the number of times the dishwasher has been used in the past, wherein the control device stores the number of operations in advance when the number of operations exceeds a predetermined number of times. 2. The dishwasher according to claim 1, wherein when water is supplied for a time exceeding a time limit obtained based on the time measured in the past, a water supply failure is detected and notified. 5. A storage means for storing the number of times of operation, which is the number of times the dishwasher has been used in the past, wherein the control means detects the predetermined water level when the number of times of operation is less than a predetermined number of times. The time required for the water supply is stored in the storage means, and when the water supply is performed beyond the limit time obtained based on the time required for the water supply process uniquely determined, the water supply failure is detected and notified. Claim 1
Dishwasher as described.