JP3293263B2 - 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.

[0003] 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 washing 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 a drainage pump (drainage means) 12 for draining the washing water in the washing tank 1. Control means 1
Reference numeral 3 controls a series of sequential operations of the washing, rinsing, and drying steps of the dishes 2.

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. Until the sensor 6 detects a predetermined water level, tap water is supplied by a water supply valve (not shown). The motor 5 and the heater 7 are energized, and the washing water is heated by the washing pump 4 toward the dishes 2 while the washing nozzle 3 is being heated.
Squirted from. 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 operates the drain pump 12 to drain the cleaning water once. Next, tap water is newly supplied, and the same operation as in the above-described washing step is performed for several minutes to drain the 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. Lastly, the blower fan 9 is operated to discharge the steam in the washing tank 1 to the outside of the apparatus, and at the same time, the heater 7 is operated.
The tableware 2 is heated intermittently to dry the attached water droplets.

Here, a method of detecting a drainage failure in the drainage process will be described with reference to FIG.

When the drainage process starts, the drainage pump 12 drains the washing water into the washing tank 1 and starts measuring the drainage time by a timer in step 16 in FIG.
If the measured time of the timer is less than the predetermined time set in step 17, the water level sensor 6 is determined in step 19.
After the water is drained until the predetermined water level is detected, the draining process ends. During the drainage process, if the drainage time is extremely longer than usual due to factors such as clogging of the drainage route, the timer measurement time exceeds the predetermined time set in step 17 in step 17, so in step 18 Detects drainage failure and reports this.

[0008]

However, in the above-mentioned conventional dishwasher, the time limit for judging a drainage failure in step 17 of FIG. 9 is determined to a unique value based on the time required for the drainage process in a standard state. Therefore, for example, under a condition where the drainage amount is smaller than the drainage amount per unit time in the standard state, the time difference between the time required for the drainage process even in the normal state and the limit time for judging a drainage defect is small, and there is a margin. For this reason, if the amount of wastewater per unit time is reduced due to factors such as the clogging of the wastewater in the drainage path, a poor drainage is detected immediately.

[0009] The present invention solves the above-mentioned problems, and in a variety of environments where a dishwasher is installed, it is possible to judge a drainage defect based on a uniform standard without being affected by variations in the amount of drainage per unit time. determining the limit time for the poor drainage detected with this time, we have a common purpose to make it informs them.

[0010] Then, when the variation of the amount of water discharged per unit time is larger, determines the limit time to determine poor drainage with the criteria of uniform, as stably detects poor drainage, informs this The second object is to do so.

Further, even when the amount of drainage per unit time is large and therefore the time required for the drainage process exceeds a preset range, the time limit for judging a defective drainage is determined on a uniform basis. In addition, a third object is to stably detect a drainage failure and notify the user of the failure.

In addition, even when the amount of drainage per unit time is large and the time required for the drainage process greatly exceeds a preset range, a drainage defect is properly detected and notified. The fourth object is to do so.

[0013] In addition, even with regard to a decrease in the amount of wastewater per unit time, which may be caused by impurities adhering to the wastewater passage due to aging, a time limit for judging poor drainage is determined based on a uniform standard. A fifth object of the present invention is to stably detect a poor drainage and to notify the same.

Further, in a dishwasher which has just been installed, the time required for the past drainage process cannot be known stably, and therefore, the limit time for judging a drainage failure is determined on a uniform basis. A sixth object is to appropriately detect a drainage failure and notify the same even when it is not possible.

[0015]

In order to achieve the second object, the present invention provides a washing tank for accommodating tableware and the washing tank.
Drainage means for draining washing water in the tank, washing in the washing tank;
A water level detecting means for detecting a water level of the purified water;
Control to control the sequential operation of the cleaning, rinsing, and drying processes
Means, and after the start of the drainage stroke,
Storage means for storing the time required to detect
The control means detects the first detection stored in the storage means.
The average value of the time of high degree or the time measured in the past
The true time, and the limit time obtained based on the true time is
If the water is drained beyond this point, it will detect and notify the drainage failure
This is defined as a second problem solving means.

In order to achieve the third object, tableware
And a drain for cleaning water in the cleaning tank.
Drainage means for detecting the level of cleaning water in the cleaning tank
Water level detecting means, washing, rinsing and drying steps of the tableware
Control means for controlling the sequential operation of the
It is necessary for the water level detecting means to detect a predetermined water level later.
Storage means for storing a time period, the control means,
The limit time obtained based on the time stored in the storage means is
If the water is drained beyond this point, it will detect and notify the drainage failure
In the case where the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range set in advance, using the previously measured time previously stored in the storage means, A third problem-solving means is to detect and notify a drainage defect when drainage is performed beyond the time limit obtained based on the time.

In order to achieve the fourth object, tableware
And a drain for cleaning water in the cleaning tank.
Drainage means for detecting the level of cleaning water in the cleaning tank
Water level detecting means, washing, rinsing and drying steps of the tableware
Control means for controlling the sequential operation of the
It is necessary for the water level detecting means to detect a predetermined water level later.
Storage means for storing a time period, the control means,
The limit time obtained based on the time stored in the storage means is
If the water is drained beyond this point, it will detect and notify the drainage failure
If the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range, the time required for the drainage process is determined uniquely, and the limit obtained based on this time is determined. The fourth problem-solving means is that when drainage is performed over a period of time, a drainage failure is detected and notified.

In order to achieve the fifth object, tableware
And a drain for cleaning water in the cleaning tank .
Drainage means for detecting the level of cleaning water in the cleaning tank
Water level detecting means, washing, rinsing and drying steps of the tableware
Control means for controlling the sequential operation of the
It is necessary for the water level detecting means to detect a predetermined water level later.
Storage means for storing a time period, and a storage means for storing the number of times of operation that is the number of times the dishwasher has been used in the past ,
The control unit is configured to perform the control based on the time stored in the storage unit.
If drainage occurs beyond the required time limit, poor drainage
Is detected and notified, and when the number of times of operation exceeds a predetermined number of times, a time limit previously obtained based on this time using a previously measured time previously stored in the storage means. The fifth problem-solving means is to detect and notify a drainage defect when drainage is performed beyond the threshold.

Further, in order to achieve the sixth object, food
A washing tank for storing instruments and drainage of washing water in the washing tank;
Drainage means for detecting the level of cleaning water in the cleaning tank.
Water level detecting means for washing, rinsing, and drying the dishes.
Control means for controlling a series of sequential operations of the
It is necessary for the water level detection means to detect a predetermined water level after the start.
Storage means for storing the time of operation, and storage means for storing the number of times of operation, which is the number of times the dishwasher has been used in the past.
The control means controls the time based on the time stored in the storage means.
If drainage takes place beyond the required time limit,
If a failure is detected and reported , and the number of operations is less than a predetermined number of times set in advance, the time required for the water level detection means to detect the predetermined water level is stored in the storage means, The sixth problem-solving means is that when drainage is performed beyond the time limit obtained based on the time required for the drainage process determined in (1), drainage failure is detected and reported.

[0020]

According to the present invention, by the above-mentioned common means, the actual time required for the water level detection means to detect the predetermined water level at the time of drainage (actual drainage time) is known, and this time is stored in the storage means for each predetermined time. Using this time, a time limit for detecting a drainage failure is calculated. At this time, the margin of the limit time for detecting the drainage failure with respect to the time required for the drainage process can be treated equivalent to that in the standard state,
This makes it possible to determine the limit time for judging drainage failures with a uniform standard without being affected by the variation in drainage volume per unit time, and use this time to detect drainage failures and report this. it can.

[0021] Then, the second means for solving problems, actually takes time to detect a predetermined water level by the water level detecting means during draining know the (actual drainage time), stores the time in the storage means at predetermined time intervals Using this, the time of the highest detection degree in the past or the average value of the times measured in the past is used as the true drainage time, and this time is used to find the limit time for detecting the drainage failure. This makes it possible to determine the limit time for judging a drainage defect with a uniform standard without being affected by the variation in the drainage amount per unit time, stably detect the drainage defect, and report this.

Further, by the third means for solving the problem, the actual time required for detecting the predetermined water level by the water level detecting means at the time of drainage (actual drainage time) is known, and this time is stored in the storage means for each predetermined time. If the time exceeds a predetermined range set in advance, the time beyond the predetermined range is not stored. The present drainage time can be obtained by using the previously measured drainage time held in advance, and the time limit for detecting a drainage failure is determined using this time. With this, even when the amount of drainage per unit time varies greatly, it is possible to determine the limit time for judging drainage faults with a uniform standard, stably detect drainage faults, and report this. it can.

According to the fourth problem solving means, a time (actual drainage time) actually required until a predetermined water level is detected by the water level detecting means at the time of drainage is known, and this time is set in a predetermined range set in advance. When the value greatly exceeds the value, the time required for the drainage process can be unambiguously determined, and this can be used to appropriately detect a drainage defect and notify the user.

According to a fifth aspect of the present invention, the actual time required for detecting the predetermined water level by the water level detecting means (actual drainage time) at the time of drainage 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 drainage defect after the next time, the drainage time measured in the past, which is stored in the storage means in advance, 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 regarded as the true drainage time, and by using this time to determine the limit time for detecting the drainage failure, the drainage failure is determined by a uniform standard without being affected by the variation in the drainage amount per unit time. The limit time is determined, and when drainage failures are detected stably and used more than the specified number of times of operation, this limit time is fixed, so impurities adhere to the drainage passage due to aging. It is possible to detect a decrease in drainage capacity that can occur due to the drainage as a drainage defect.

Further, by means of the sixth problem solving means, the time (actual drainage time) actually required until the predetermined water level is detected by the water level detecting means at the time of drainage is known, and this time is stored in the storage means for each predetermined time. However, if the number of operations exceeds a preset number when calculating the limit time for detecting a drainage defect after the next time, the previously measured drainage time previously stored in the storage means is used to determine one time in the past. The average value of the time when the number of times of detection is high or the time measured in the past is the true drainage time, and if the number of operations is less than the preset number, the drainage time is uniquely determined and the drainage failure is determined using this time. By finding the time limit for detection, drainage can be properly performed even if the time required for the past drainage process in the dishwasher that has just been installed cannot be known stably. Detects the good, it can be made to notify this.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a reference example showing a common configuration of the present invention will be described 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 the sequential operation of the washing, rinsing and drying steps of the tableware 2 until the water level sensor (water level detecting means) 6 detects a predetermined water level at the time of drainage. The actual time required for actual drainage (actual drainage time) is measured, and this time is stored in the storage means 15. Using this time, a limit time for detecting a drainage failure is obtained. When it is performed, it is configured to detect and notify a drainage failure.

Although not shown, the water level sensor 6 has a magnetic body 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 the water is drained into the cleaning tank 1, the pressure applied to the water level sensor 6 decreases, the oscillation frequency increases, and the water is drained 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 that of the conventional example, so that the description thereof is omitted, and the drainage failure is not affected by the variation of the drainage amount per unit time. Means for calculating the time limit for determination will be described.

When the drain stroke starts, step 1 in FIG.
At step 6, measurement of the time required for the drainage process is started by the timer. At step 20, the previously stored drainage time is called as t1, and at step 21, the limit time t2 for detecting a drainage failure is calculated by the following equation.

T2 = t1 × a where a is a constant. If the timer measurement time has not exceeded the limit time t2 in step 17, the water is drained 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 drainage stroke When t1 is known, the time t1 is stored in the storage means 15 in step 23, and the drainage process is terminated. Step 1
If the timer measurement time has exceeded the limit time t2 in step 7, a drainage failure is detected in step 18 and an abnormality is notified.

Thus, in the installation environment of each dishwasher, the time limit for detecting the drainage failure with respect to the time required for the drainage process can be handled in the same manner as that in the standard state, that is, the variation in the drainage amount per unit time is affected. Without receiving the same, it is possible to determine the time limit for judging a drainage defect based on a uniform standard, and detect and report the drainage defect.

In the above-mentioned reference example, the timing and the number of calling the stored previous time value are specifically shown. However, this is a limit for detecting a drainage defect without being affected by the variation of the drainage amount per unit time. The means for calculating the time is not limited.

Next, a second embodiment of the present invention will be described.

The control means 14 in FIG. 1 measures the actual time required for the water level sensor 6 to detect a predetermined water level at the time of drainage (actual drainage time), and stores this time in the storage means 15. Using this, the time with the highest degree of detection in the past or the average value of the times measured in the past is taken as the true drainage time, the limit time for detecting the drainage failure using this time is determined, and exceeding this limit time When drainage is performed, the system detects and informs of poor drainage. Other configurations are the same as those of the above-mentioned reference example .

The operation of the above configuration will be described with reference to FIG. Steps 16 to 23 in FIG. 3 are the same as those in the above-described reference example, and thus description thereof is omitted. However, the constant b in step 21 may be the same as the constant a in the above reference example .

In step 22, the timer measurement time t1 is known, and in step 24, the average value t of the previously stored time is calculated.
ave, and in step 25, the average value ta of this time
ve and the time t1 measured in step 22 are used to newly calculate an average value of time tave. In step 26, the current time t1 is set as the average value tave. In step 23, the time t1 is stored in the storage means 15. Remember and end the draining process.

In this way, the time limit for judging a drainage failure is determined based on a uniform standard without being affected by variations in the amount of drainage per unit time, and the drainage failure is detected stably and reported. be able to.

Next, a third embodiment of the present invention will be described.

The control means 14 in FIG. 1 knows the actual time (actual drainage time) required before the water level sensor 6 detects the predetermined water level at the time of drainage, and stores this time in the storage means 15 for each predetermined time. If the time exceeds a predetermined range set in advance, the time beyond the predetermined range is not stored. The current drainage time is obtained by using the drainage time measured in the past that was held in advance, and the limit time for detecting a drainage failure using this time is determined.If drainage is performed beyond this limit time, Drainage failure is detected and reported.
Other configurations are the same as those of the above-mentioned reference example .

The operation of the above configuration will be described with reference to FIG. Steps 16 to 23 in FIG. 4 are the same as those in the above-described reference example, and thus description thereof will be omitted. However, the constant m in step 21 may be the same as the constant a in the above reference example .

In step 22, the timer measurement time t1 is known, and in 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 23.
Is stored in the storage means 15, and the drainage process is terminated. Also,
In steps 27 and 28, the time t1 is out of the predetermined range (t1
If 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 drainage process is terminated.

In this manner, even when the amount of drainage per unit time varies greatly, the time limit for judging a drainage defect is determined based on a uniform standard, the drainage defect is detected stably, and this is reported. Can be

Next, a fourth embodiment of the present invention will be described.

The control means 14 in FIG. 1 knows the actual time required for the water level sensor 6 to detect the predetermined water level at the time of drainage (actual drainage time), and increases this time by increasing the predetermined range. If it exceeds, the time required for the drainage process is uniquely determined, and if the drainage is performed beyond the time limit obtained based on this time, a drainage failure is detected and reported. Other configurations are the same as those of the above-mentioned reference example .

The operation of the above configuration will be described with reference to FIG. Steps 16 to 23 in FIG. 5 are the same as those in the above-described reference example, and thus description thereof will be omitted. However, the constant i in step 21 may be the same as the constant a in the above reference example .

In step 23, the timer measurement time t1 is known, and in steps 29 and 30, the time t1 is within a predetermined range (e <t1 <g, where e and g are constants and e <g
If the value of g) is to be obtained, the measurement time t1 is set in step 23.
Is stored in the storage means 15, and the drainage 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 23, and the drainage process is completed.

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

Next, a fifth embodiment of the present invention will be described.

The storage means 15 in FIG. 1 stores the actual time (actual drainage time) required before the water level sensor 6 detects the predetermined water level at the time of drainage, and the number of times the dishwasher has been used in the past. The number of times is stored. The control means 14 controls the water level sensor 6 during drainage.
The time required for detecting the predetermined water level (actual drainage time) is known, and when the number of operations is equal to or less than a predetermined number of times, this time is stored in the storage means 15 for each predetermined time, and the number of operations is set in advance. If you exceed the specified number of times,
Do not remember this time.

When calculating the limit time for detecting a drainage failure after the next time, the drainage time measured in the past, which is stored in the storage means 15 in advance, is used to measure the time of the highest degree of detection in the past or in the past. The average value of the time taken is regarded as the true drainage time, and the time limit for detecting poor drainage is calculated using this time, and if drainage is performed beyond this time limit, the faulty drainage is detected and reported. I have. Other configurations are the same as those of the above-mentioned reference example .

The operation of the above configuration will be described with reference to FIG. Steps 16 to 23 in FIG. 6 are the same as those in the above-described reference example.
Steps 26 to 26 are the same as in the second 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 above reference example .

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), steps 24 to 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, and this time t1 is stored in step 23 to end the drainage process. On the other hand, when the number of operations u exceeds 50 in step 33, the drainage process is completed without changing the content stored in the storage means 15.

Thus, the time limit for judging a drainage failure is determined with a uniform standard without being affected by the variation in the drainage amount per unit time, and the drainage failure is detected stably and the number of operations is reduced. If the filter is used more than the specified number of times, the time limit is fixed, so the deterioration of the drainage capacity that can be caused by impurities adhering to the drainage passage (drainage pipe) due to aging is appropriately detected as a drainage defect. can do.

Next, a sixth embodiment of the present invention will be described.

The storage means 15 in FIG. 1 stores the actual time required for the water level sensor 6 to detect the predetermined water level at the time of drainage (actual drainage time), and also indicates the number of times the dishwasher has been used in the past. The number of times is stored. The control means 14 controls the water level sensor 6 during drainage.
The time required for detecting the predetermined water level (actual drainage time) is obtained from the storage means 1 for each predetermined time.
In the case where the number of operations exceeds a predetermined number set in advance when calculating the limit time for detecting the drainage failure after the next time, the previously measured drainage time previously stored in the storage means 15 is used. In the past, the time of the highest detection degree in the past or the average value of the times measured in the past is the true drainage time, and, if the number of operations is less than a predetermined number of times set in advance, the drainage time is uniquely determined, The drainage time is used to determine a limit time for detecting a drainage defect, and when drainage is performed beyond the limit time, the drainage defect is detected and reported. Other configurations are the same as those of the above-mentioned reference example .

The operation of the above configuration will be described with reference to FIG. Steps 16 to 23 in FIG. 7 are the same as those in the above-described reference example.
Steps 26 to 26 are the same as in the second embodiment, and a description thereof will be omitted.

When the drainage process is started, step 1 in FIG.
At step 6, the timer starts measuring the time required for the drainage stroke. At step 20, the previously stored drainage time is called as t1, at step 34 the previously stored operation number is called as u, and at step 35, the operation number is called. u is 1
If the number of times is less than 0 (predetermined number of times), the time t1 is uniquely determined in step 36 as t1 = k (k is a constant), and in step 21, the limit time t2 for detecting a drainage failure is expressed by the following equation. Is calculated.

T2 = t1 × p Here, p is a constant, which may be the same as the constant a in the above reference example . 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 21, the limit time t2 for detecting a drainage failure is calculated.

In this way, even if the time required for the past drainage process cannot be known stably in the dishwasher which has just been installed, a drainage defect is properly detected and notified. can do.

[0062]

As apparent from the above embodiments, according to the present invention, a washing tank for accommodating tableware, drainage means for draining washing water in 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 for the water level detection means to detect a predetermined water level after the start of the drainage stroke, wherein the control means determines whether the drainage exceeds the time limit obtained based on the time stored in the storage means. When this is done, the drainage failure is detected and reported, so the actual time required for the water level detection means to detect the predetermined water level at the time of drainage (actual drainage time) is known, and this time is determined at predetermined intervals. The time is stored in the storage means, and the time limit for detecting the drainage failure is obtained using this time. At this time, the margin of time for detecting the drainage failure with respect to the time required for the drainage process can be treated as equivalent to that in the standard state, so that the uniform standard can be set without being affected by the variation of the drainage amount per unit time. To determine the time limit for judging poor drainage,
Using this time, a drainage failure can be detected and reported.

Further, the control means sets the true time as the time of the highest detection degree stored in the storage means or the average value of the times measured in the past, and the drainage exceeds the limit time obtained based on this time. In this case, the system detects and notifies the user of a drainage failure, and knows the actual time (actual drainage time) required before the water level detection means detects the predetermined water level at the time of drainage, and stores this time for each predetermined time. It is stored in the means, and using this, the average value of the time with the highest degree of detection in the past or the time measured in the past is taken as the true drainage time, and using this time, the limit time for detecting the drainage failure is calculated. This makes it possible to easily determine the time limit for judging drainage failures with a uniform standard without being affected by variations in drainage volume per unit time, and to stably detect drainage failures. It can be notified.

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. In the case where drainage is performed beyond the time limit obtained based on this time, a drainage failure is detected and reported, so that the actual time required until the predetermined water level is detected by the water level detection means at the time of drainage (actually Drainage 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 this predetermined range is not stored. The current drainage time can be obtained by using the previously measured drainage time previously stored in the storage means when calculating the limit time for detecting a drainage failure after the next time. Using this method, the time limit for detecting a drainage defect is determined, so that even when the amount of drainage per unit time varies greatly, the limit time for judging a drainage defect can be easily determined based on a uniform standard, and stable. Then, it is possible to detect and notify the drainage failure.

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 drainage process uniquely and determines the time based on this time. When drainage is performed beyond the specified time limit, the system detects and reports a drainage failure, so it is necessary to know the actual time (actual drainage time) required for the water level detection means to detect the predetermined water level at the time of drainage. If this time greatly exceeds a predetermined range set in advance, it is possible to uniquely determine the time required for the drainage process, and to use this to appropriately detect and report a drainage failure.

[0066] Further, there is provided storage means for storing the number of operations, 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 the drainage is performed over the time limit obtained based on the previously measured time stored in the storage means in advance and if the drainage is performed, Is detected and notified, the actual time required for the water level detection means to detect the predetermined water level at the time of drainage (actual drainage 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 drainage defect after the next time, use the previously measured drainage time previously stored in the storage means, and use the previously detected highest drainage time or the average of the previously measured time. By setting the value to the true drainage time and using this time to determine the limit time for detecting drainage failure,
Without being affected by the variation in the amount of wastewater per unit time,
Determine the limit time for judging drainage faults with a uniform standard, stably detect drainage faults, and when using beyond the specified number of operations, this limit time is fixed, so drainage due to aging It is possible to detect a decrease in drainage capacity that can be caused by impurities adhering in the path as a drainage defect.

Further, there is provided 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, 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 drainage is performed beyond the time limit obtained based on the time required for the drainage process uniquely determined, the drainage failure occurs. Is detected and notified, the time actually required until the water level detection means detects the predetermined water level at the time of drainage (actual drainage 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 when calculating the limit time for detecting a drainage defect after the next time, the highest degree of detection in the past using the previously measured drainage time previously stored in the storage means. The drainage time is determined as the true drainage time if the number of operations is equal to or less than the preset number of times, and the drainage time is uniquely determined. By finding the time limit for detection, if a dishwasher that has just been installed has not been able to stably know the time required for the past drainage process, it should properly detect and report a drainage defect. Can be.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a dishwasher according to a reference example of the present invention.

FIG. 2 is a flowchart showing a process of detecting a drainage failure of the dishwasher.

FIG. 3 is a flowchart illustrating a process of detecting a drainage failure of a dishwasher according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing a process of detecting a drainage failure in a dishwasher according to a third embodiment of the present invention.

FIG. 5 is a flowchart illustrating a process of detecting a drainage failure of a dishwasher according to a fourth embodiment of the present invention.

FIG. 6 is a flowchart showing a process of detecting a drainage failure of a dishwasher according to a fifth embodiment of the present invention.

FIG. 7 is a flowchart illustrating a process of detecting a drainage failure of a dishwasher according to a sixth embodiment of the present invention.

FIG. 8 is a system configuration diagram of a conventional dishwasher.

FIG. 9 is a flowchart showing a process of detecting a drainage failure of the dishwasher.

[Explanation of symbols]

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

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Wataru Hamaguchi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-338442 (JP, A) JP-A-1- 290364 (JP, A) JP-A-4-240432 (JP, A) JP-A-64-40098 (JP, A) JP-A-4-38925 (JP, A) JP-A-3-215230 (JP, A) Shokai 61-10172 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 15/00-15/46

Claims (5)

(57) [Claims] 1. A washing tank for accommodating tableware, a drainage unit for draining washing water in the washing tank, a water level detecting unit for detecting a level of washing water in the washing tank, and a washing of the tableware. , rinsing, and a control unit for controlling a series of sequential operations of the drying cycle, the water level detecting means after the start draining stroke and storage means for storing the time required to detect a predetermined level, said control means, said First detection stored in storage means
The average value of the time of high degree or the time measured in the past
The true time, and the limit time obtained based on the true time is
If the water is drained beyond this point, it will detect and notify the drainage failure
Dishwasher you so that. 2. A washing tank for storing tableware and the washing tank.
Drainage means for draining washing water in the inside, and washing in the washing tank
A water level detecting means for detecting a water level of the water, and washing of the tableware;
Control to control the sequential operation of the cleaning, rinsing, and drying processes
Means, and after the start of the drainage stroke,
Storage means for storing the time required to detect
The control means controls the time based on the time stored in the storage means.
If drainage takes place beyond the required time limit,
If the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range set in advance, the failure is measured in the past and held in the storage means in advance. with time, if the waste water is carried out beyond the limit time determined based on this time, tableware washing machine which is adapted to notify by detecting poor drainage. 3. A washing tank for storing tableware and the washing tank.
Drainage means for draining washing water in the inside, and washing in the washing tank
A water level detecting means for detecting a water level of the water, and washing of the tableware;
Control to control the sequential operation of the cleaning, rinsing, and drying processes
Means, and after the start of the drainage stroke,
Storage means for storing the time required to detect
The control means controls the time based on the time stored in the storage means.
If drainage takes place beyond the required time limit,
If the time required for detecting the predetermined water level by the water level detection means exceeds a predetermined range set in advance, the time required for the drainage process is uniquely determined, and If drainage beyond the limit time determined based on the time is performed, tableware washing machine which is adapted to notify by detecting poor drainage. 4. A washing tank for storing tableware and the washing tank.
Drainage means for draining washing water in the inside, and washing in the washing tank
A water level detecting means for detecting a water level of the water, and washing of the tableware;
Control to control the sequential operation of the cleaning, rinsing, and drying processes
Means, and after the start of the drainage stroke,
Storage means for storing the time required to detect the, and storage means for storing the number of operations that is the number of times the dishwasher was used in the past, the control means, the storage means
Drainage exceeds the time limit obtained based on the stored time.
Should be detected and notified of drainage failures,
In the case where the number of times of operation exceeds a predetermined number of times set in advance, using the previously measured time previously held in the storage means, if the drainage is performed over the time limit obtained based on this time, <br/> the tableware washing machine to notification by detecting poor drainage. 5. A washing tank for storing tableware and the washing tank.
Drainage means for draining washing water in the inside, and washing in the washing tank
A water level detecting means for detecting a water level of the water, and washing of the tableware;
Control to control the sequential operation of the cleaning, rinsing, and drying processes
Means, and after the start of the drainage stroke,
Storage means for storing the time required to detect the, and storage means for storing the number of operations that is the number of times the dishwasher was used in the past, the control means, the storage means
Drainage exceeds the time limit obtained based on the stored time.
Should be detected and notified of drainage failures,
If the number of operations is less than the preset 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 drainage is performed beyond the time limit obtained based on the time required for the drainage process uniquely determined, the drainage failure occurs. Was detected and reported .
Tableware washing machine.