JP3451812B2 - 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 spraying washing water on the dishes stored in a washing tank.

[0002]

2. Description of the Related Art Conventionally, this type of dishwasher has been constructed as shown in FIG. The configuration will be described below.

As shown in FIG. 15, the cleaning tank 1 stores dishes 2 inside and stores the cleaning water supplied from the water supply valve 3 at the bottom of the cleaning tank. The cleaning nozzle 4 is rotatably supported in the cleaning tank 1 and ejects cleaning water toward the tableware 2. The washing pump 5 sends the washing water to the washing nozzle 4, and the washing pump 5 is driven by the motor 6. The drainage pump 7 discharges washing water to the outside of the machine, and the water level detecting means 8 detects the water level in the washing tank 1 and outputs it as an electric signal.

A heater (heating means) 9 is arranged at the bottom of the cleaning tank 1 to heat the cleaning water. The temperature detecting means 10 is attached to the bottom of the cleaning tank 1 so as to be in close contact with the bottom of the cleaning tank 1, and detects the temperature of the cleaning water. The blower fan 11 sends out the steam in the cleaning tank 1 and is discharged to the outside of the machine through the exhaust port 12. In addition, 13 is a tableware basket in which the tableware 2 is placed, and 14 is a door which opens and closes when the tableware 2 is put in and taken out from the washing tank 1. The control means 15 controls the sequential operations by a series of sequence programs for cleaning, rinsing and drying the dishes 2.

To explain the operation in the above configuration, the user opens the door 14, places the dishes 2 in the dish basket 13 and stores them in the washing tank 1, puts the detergent in the washing tank, and then starts the operation. Then, first, a predetermined amount of tap water is supplied from the water supply valve 3 to the bottom of the cleaning tank 1 until the water level detection means 8 detects a predetermined water level. Then, the motor 6 is driven, the heater 9 is simultaneously energized, and the washing water is jetted from the washing nozzle 4 toward the dishes 2 by the washing pump 5 while being heated. At this time, the temperature detecting means 10 detects the temperature of the wash water, and the control means 15 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 15 ends the cleaning process and operates the drainage pump 7 to drain the cleaning water once.

Next, tap water is newly supplied and the same operation as the above-mentioned washing process is performed for several minutes to drain the water. After 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. The last blower fan 11 is operated to discharge the steam in the cleaning tank 1 to the outside of the machine, and at the same time, the heater 9 is intermittently energized to heat the tableware 2 and dry the attached water droplets.

[0007]

In such a conventional structure, the heater 9 for heating the cleaning water in the cleaning process is used.
In the drying process, the heater 9 is intermittently operated in order to dry the tableware 2 by air-baking to warm the air.

The control means 15 grasps the temperature of the air in the cleaning tank 1 by the temperature detection means 10, and continuously energizes the heater 9 until a predetermined temperature is detected to detect the predetermined temperature. Then, the temperature control is performed such that the power supply to the heater 9 is stopped. However, at the start of the drying process, the temperature of the inside of the cleaning tank 1 detected by the temperature detecting means 10 is not constant because the air flow in the cleaning tank 1 is not constant. There is a large error between the value and the actual temperature in the cleaning tank 1, and there is a problem that the heater 9 is often over-energized to cause thermal deformation of the tableware 2.

The present invention is intended to solve the above problems, and it is an object of the present invention to improve the accuracy of the temperature detection in the cleaning tank by the temperature detection means when performing the intermittent operation of the heating means in the drying process.

[0010]

In the dishwasher of the present invention, there is provided a control means for controlling a series of sequential operations of washing, rinsing and drying steps of dishes, and the control means is a heating device.
After the drainage in the rinsing step is completed, when performing intermittent operation of the heating means in the drying step , after operating the blower fan for a first predetermined time, the blower fan and the heating means are operated to dry the tableware. Then stop the operation of the heating means
However , the blower fan is configured to operate only for the second predetermined time.

As a result, the air blower fan is operated for a first predetermined time before operating the heating means to create a constant air flow in the cleaning tank, so that the temperature of the air heated by the heating means is detected. being biased in means near the neighbor is rather the name, also,
Even after the power supply to the heating means is stopped, the blower fan is operated for the second predetermined time, so that the heat remaining in the heating means does not excessively heat the vicinity of the temperature detecting means. Can accurately detect the temperature in the cleaning tank.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is a washing tank for storing dishes, a heating means for drying the dishes, and the steam in the washing tank is discharged to the outside of the machine. A blower fan and cleaning, rinsing of the tableware, and a control unit for controlling a series of sequential operations of a drying process, the control unit, when performing the intermittent operation of the heating unit in the drying process,
After operating the blower fan for a first predetermined time, the blower fan and the heating means are operated to dry the tableware, and after the operation of the heating means is stopped, the blower fan is operated for a second predetermined time. The air heated by the heating means is heated to a certain temperature in order to create a constant air flow in the cleaning tank by operating the blower fan for a predetermined time before operating the heating means. There is no bias in the vicinity of the detection means, and since the blower fan operates for a predetermined time even after the power supply to the heating means is stopped, the heat remaining in the heating means excessively heats the vicinity of the temperature detection means. Therefore, the temperature detecting means can accurately detect the temperature in the cleaning tank.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, a power source voltage detecting means for detecting the voltage of the commercial power source is provided, and the first predetermined time and the second predetermined time are provided.
During, the power supply voltage is obtained by configuration so that the output calculated in response to the voltage value detected by the detecting means, also the power supply voltage value of the various environments used in dishwashers, the heating means It is possible to calculate the blowing time that creates a constant flow of air in the cleaning tank before starting energization, and the air cooling time for cooling the residual heat of the heating means even after stopping the energization of the heating means. The temperature detecting means can accurately detect the temperature in the cleaning tank.

According to a third aspect of the present invention, in addition to the first aspect of the present invention, a power source voltage detecting means for detecting the voltage of the commercial power source is provided, and the first predetermined time and the second predetermined time are provided.
During, the power supply when the value of the voltage detected by the voltage detecting means exceeds a predetermined range set in advance, one defined manner determined of
Re is obtained by configuration so that, when the value of the supply voltage by an instantaneous power failure or noise can not be detected accurately even blowing time to make a steady stream of air in the cleaning tank before starting the current supply to the heating means With this, the air cooling time for cooling the residual heat of the heating means can be appropriately determined even after the power supply to the heating means is stopped, and the temperature in the cleaning tank can be accurately detected by the temperature detection means. .

According to a fourth aspect of the present invention, in addition to the first aspect of the present invention, a storage means for storing the voltage value of the commercial power source is provided, and the first predetermined time and the second predetermined time are:
The average value of the most detected degree high voltage value or the stored voltage value stored in the storage means as a true voltage value, which is configured to so that the output calculated in response to the voltage value,
Ventilation time that creates a constant air flow in the cleaning tank before starting energization to the heating means without being affected by variations in the power supply voltage value, and even after stopping energization to the heating means You can calculate the air cooling time to cool the residual heat,
The temperature detecting means can accurately detect the temperature in the cleaning tank.

According to a fifth aspect of the present invention, in addition to the first aspect of the present invention, a power supply frequency detecting means for detecting the frequency of the commercial power supply is provided, and the first predetermined time and the second place.
The constant time, which is configured to so that the output calculated to correspond to the value of the frequency detected by the power supply frequency detecting means, with respect to the frequency of the power supply according to various regional differences used in dishwasher, heating It is possible to calculate the blowing time that creates a constant flow of air in the cleaning tank before the energization of the heating means, and the air cooling time for cooling the residual heat of the heating means even after stopping the energization of the heating means. Therefore, the temperature detecting means can accurately detect the temperature in the cleaning tank.

According to a sixth aspect of the present invention, in addition to the first aspect of the present invention, a power supply frequency detecting means for detecting the frequency of the commercial power supply is provided, and the first predetermined time and the second place.
The constant time, and if the difference exceeds a predetermined range the value of the frequency detected by the power supply frequency detecting means is preset, which is configured to so that the determined one defined manner, power supply frequency value by the instantaneous power failure or noise Even if the temperature cannot be accurately detected, the blowing time that creates a constant flow of air in the cleaning tank before the energization of the heating means and the residual heat of the heating means is cooled even after the energization of the heating means is stopped. The air cooling time for cooling can be appropriately determined, and the temperature detecting means can accurately detect the temperature in the cleaning tank.

According to a seventh aspect of the present invention, in addition to the first aspect of the present invention, storage means for storing the frequency of the commercial power source is provided, and the first predetermined time and the second predetermined time are:
The frequency of the highest detection degree stored in the storage means or the average value of the stored frequencies is the frequency of the true power source,
Is obtained by configuration so that the output calculated to correspond to the value of this frequency, without being affected by variations in the frequency of the commercial power source, the constant air inside the cleaning tank before starting the current supply to the heating means It is possible to stably calculate the air blowing time that creates the flow and the air cooling time for cooling the residual heat of the heating means even after the power supply to the heating means is stopped. Can be detected.

According to the invention described in claim 8, in addition to the invention described in claim 1, a storage means for storing the number of times of use of the equipment is provided, and the first predetermined time and the second predetermined time are used. number of times is obtained by configuration so that the output calculated correspondingly, due to deterioration of the blower fan due to aging, even with increasing time the blower fan is required until activation, before starting the current supply to the heating means It is possible to calculate the blowing time to create a constant air flow in the cleaning tank and the air cooling time to cool the residual heat of the heating means even after the power supply to the heating means is stopped. The temperature inside can be detected accurately.

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

(Embodiment 1) As shown in FIG. 1, the control means 16 controls the washing of the tableware 2.
In addition to controlling a series of sequential operations in the rinsing and drying steps, when the heater (heating means) 9 is intermittently operated in the drying step, the blowing fan 11 is operated for a first predetermined time t1 and then the blowing fan 11 And the heater 9 are operated to operate the tableware 2
After the air is dried and the operation of the heater 9 is stopped, the blower fan 11 is operated for the second predetermined time t2.

The operation of the above configuration will be described with reference to FIG. When the drying process is started, the variable a indicating the number of energizations of the heater 9 is cleared in step 17, and a constant air flow is created in the cleaning tank 1 before energization of the heater 9 is started in step 18. A predetermined time t1 of 1 (for example, 10 seconds) and a second predetermined time t2 (for example, 2 seconds) for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped, Blower fan 1 at step 19
The operation of 1 is started.

In step 20, the timer measurement is started,
After the timer measurement time t is detected in step 21, the blower fan 11 is operated until the timer measurement time t reaches the first predetermined time t1 in step 22, and then step 23
The energization of the heater 9 is started at, the timer measurement is started at step 24, the timer measurement time t is detected at step 25, and the timer measurement time t is detected at step 26.
Heater 9 while operating blower fan 11 until 2 seconds
After the power is supplied to the heater 9, the power supply to the heater 9 is stopped in step 27.

In step 28, timer measurement is started,
In step 29, the timer measurement time t is detected, in step 30, the blower fan 11 is operated to cool the residual heat of the heater until the timer measurement time t reaches the second predetermined time t2, and in step 31, the blower fan 11 Is stopped, and a variable a indicating the number of times the heater 9 is energized is stopped in step 32.
Is added, and the above intermittent operation of the heater is repeated until the number of times of energization reaches the target number of times, that is, 10 times in step 33.

As a result, before the heater 9 is operated, the blower fan 11 is operated for the first predetermined time t1 to create a constant air flow in the cleaning tank 1, so that the air heated by the heater 9 is heated. Is not biased near the temperature detecting means 10. Further, since the blower fan 11 is operated for the second predetermined time t2 even after the power supply to the heater 9 is stopped, the heat remaining in the heater 9 does not excessively heat the vicinity of the temperature detecting means 10. Therefore, the temperature detecting means 10 can accurately detect the temperature in the cleaning tank 1.

In the above description, the first predetermined time t
Although the numerical values of 1 and the second predetermined time t2 and the timing to be determined are specifically shown, this is because the blower fan 11 is operated before the energization of the heater 9 is started and the energization of the heater 9 is stopped. The present invention that operates the blower fan 11 is not limited.

(Embodiment 2) As shown in FIG. 3, the power supply voltage detecting means 34 detects the voltage value of the commercial power supply using the equipment, and the control means 3
5 calculates the first predetermined time t1 and the second predetermined time t2 corresponding to the voltage value detected by the power supply voltage detection means 34, and blows air when performing the intermittent operation of the heater 9 in the drying process. After operating the fan 11 for the first predetermined time t1, the blower fan 11 and the heater 9 are operated to dry the tableware 2,
After stopping the operation of the heater 9, the blower fan 11 is configured to operate for the second predetermined time t2. The other structure is the same as that of the first embodiment.

The operation of the above structure will be described with reference to FIG. It should be noted that step 17 and steps 19 to 33 in FIG. 4 are the same as those in the above-described first embodiment, and therefore description thereof will be omitted.

In step 17 of FIG. 4, the variable a indicating the number of times the heater 9 is energized is cleared, in step 36 the control means 35 detects the voltage value of the power supply by the power supply voltage detection means 34, and from step 37 to step As shown in 39, before starting to energize the heater 9 according to the voltage value, after a first predetermined time t1 for producing a constant air flow in the cleaning tank 1 and after stopping energization to the heater 9 Also calculates a second predetermined time t2 for cooling the residual heat of the heater 9.

When the voltage value of the power supply is higher than that of the standard power supply voltage, the blower fan 11 can be driven in a short time to create a constant air flow in the cleaning tank 1. If it is higher than that of the heater 9, the heater is heated for a first predetermined time t1 in which a constant air flow is generated in the cleaning tank 1 before starting to energize the heater 9 or even after the energization to the heater 9 is stopped. The second predetermined time t2 for cooling the residual heat of can be shortened as compared with the standard time.

Subsequently, in steps 19 to 33, the heater 9 is used as in the first embodiment.
And the blower fan 11 is intermittently operated.

As a result, even for power supply voltage values under various environments used by the dishwasher, the blowing time (first time) for producing a constant air flow in the cleaning tank 1 before the heater 9 is energized. And the air cooling time (second predetermined time) for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped. The temperature inside can be detected accurately.

(Embodiment 3) When the value of the voltage detected by the power supply voltage detecting means 34 exceeds a preset predetermined range, the control means 35 in FIG. 3 has a first predetermined time t1 and a second predetermined time. When the time t2 is uniquely determined and the intermittent operation of the heater 9 is performed in the drying process, the blower fan 11 is operated for the first predetermined time t1 and then the blower fan 11 and the heater 9 are operated to operate the tableware. Two
After the air is dried and the operation of the heater 9 is stopped, the blower fan 11 is operated for the second predetermined time t2. 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. It should be noted that steps 17 to 33 in FIG. 5 are the same as those in the above-described first embodiment, and a description thereof will be omitted.

At step 17 of FIG. 5, the variable a indicating the number of times the heater 9 is energized is cleared, at step 36 the control means 35 detects the voltage value of the power source by the power source voltage detection means 34, and at step 40 or step. At 41, the detected voltage value is 115 V or more or 85 V or less,
If the value deviates significantly from that of the standard, before the heater 9 is energized in step 42, a first predetermined time t1 for producing a constant air flow in the cleaning tank 1 and energization of the heater The second predetermined time t2 for cooling the residual heat of the heater 9 is uniquely determined after stopping the heating.

As a result, even when the value of the power supply voltage cannot be accurately detected due to an instantaneous power failure or noise, the air blowing time (first time) for creating a constant air flow in the cleaning tank 1 before the energization of the heater 9 is started. 1) and the air cooling time (second predetermined time) for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped. The temperature in the cleaning tank 1 can be accurately detected.

(Embodiment 4) As shown in FIG. 6, the power supply voltage detection means 43 detects the value of the voltage of the commercial power supply using the equipment, and the storage means 44 stores the power supply voltage detection means 43. Store the voltage value of the power supply detected in. The control means 45 sets the average value of the voltage values stored in the storage means 44 as the true voltage value, calculates the first predetermined time t1 and the second predetermined time t2 corresponding to this voltage value, and performs the drying process. When performing intermittent operation of the heater 9
After operating the blower fan 11 for the first predetermined time t1, the blower fan 11 and the heater 9 are operated to dry the dishes 2 and the operation of the heater 9 is stopped, and then the blower fan 11 is operated for the second predetermined time. It is configured to operate only for t2. The other structure is the same as that of the first embodiment.

The operation of the above configuration will be described with reference to FIG. It should be noted that Step 17 and Step 19 to Step 33 in FIG.
Since it is the same as, the description will be omitted.

In step 17 of FIG. 7, the variable a indicating the number of times the heater 9 is energized is cleared, in step 36 the control means 45 detects the power supply voltage value V by the power supply voltage detection means 43, and in step 46. Then, the average value Vave of the previously stored voltage values is called, a new average value Vave of the voltage values is calculated from Vave and the voltage value V measured this time in step 47, and this calculated voltage value is calculated in step 48. Average value of Vav
Store e in the storage means.

Then, in step 49, the average value Vave of the voltage values calculated this time is set as the true voltage value V, and in step 37
From step 39 to step 39, before the heater 9 is energized according to the voltage value V, the heater 9 is energized for the first predetermined time t1 in which a constant air flow is generated in the cleaning tank 1. The second predetermined time t2 for cooling the residual heat of the heater 9 even after the stop is calculated.

As a result, the cleaning tank 1 is not affected by the variation in the power supply voltage value and before the heater 9 is energized.
Blower time (first predetermined time) to create a constant air flow inside and air cooling time (second predetermined time) for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped. The temperature inside the cleaning tank 1 can be accurately detected by the temperature detecting means 10.

In the above description, the control means 45 uses the average value of the voltage values stored in the storage means 44 as the true voltage value, but the voltage value with the highest detection degree may be used as the true voltage value. .

(Embodiment 5) As shown in FIG. 8, the power supply frequency detecting means 50 detects the frequency of the commercial power supply using the equipment, and the control means 51 detects the power supply frequency detecting means 50. Know the frequency value of the power supply. The control means 51 calculates the first predetermined time t1 and the second predetermined time t2 corresponding to the value of the frequency detected by the power supply frequency detection means 50, and when performing the intermittent operation of the heater 9 in the drying process. , Blower fan 11
After the first predetermined time t1 is operated, the blower fan 11 and the heater 9 are operated to dry the dishes 2 and the operation of the heater 9 is stopped, and then the blower fan 11 is operated for the second predetermined time t.
It is configured to operate only 2. The other structure is the same as that of the first embodiment.

The operation of the above configuration will be described with reference to FIG. It should be noted that step 17 and step 19 to step 33 in FIG.
Since it is the same as, the description will be omitted.

In step 17 of FIG. 9, the variable a indicating the number of times the heater 9 is energized is cleared, in step 52 the control means 51 detects the frequency of the power supply by the power supply frequency detection means 50, and in steps 53 to 55. As shown in FIG. 3, before the heater 9 is energized according to the value of the frequency of the power source, the heater 9 is energized for the first predetermined time t1 for producing a constant air flow in the cleaning tank 1. Heater 9 after stopping
The second predetermined time t2 for cooling the residual heat of is calculated.

If the frequency of the power supply is higher than that of the standard power supply, the blower fan 11 can be driven in a short time to create a constant air flow in the cleaning tank 1. Therefore, the value of the power supply frequency is standard. If it is higher than that of the heater 9, the heater is heated for a first predetermined time t1 in which a constant air flow is generated in the cleaning tank 1 before starting to energize the heater 9 or even after the energization to the heater 9 is stopped. Second predetermined time t for cooling the residual heat of 9
2 can be shorter than that of the standard.

Subsequently, in steps 19 to 33, the heater 9 is used as in the first embodiment.
And the blower fan 11 is intermittently operated.

As a result, even with respect to the frequency of the power source used by the dishwasher due to various regional differences, before the heater 9 is energized, the blowing time (first time) for producing a constant air flow in the washing tank 1 1) and the air-cooling time (second predetermined time) for cooling the residual heat of the heater 9 even after the energization of the heater 9 is stopped. The temperature inside 1 can be detected accurately.

(Sixth Embodiment) The control means 51 in FIG.
When the value of the frequency detected by exceeds the preset predetermined range, the first predetermined time t1 and the second predetermined time t2 are uniquely determined, and when the intermittent operation of the heater 9 is performed in the drying process. After operating the blower fan 11 for the first predetermined time t1, the blower fan 11 and the heater 9 are operated to dry the dishes 2 and the operation of the heater 9 is stopped, and then the blower fan 11 is operated for the second predetermined time. It is configured to operate only at time t2. The other structure is the same as that of the fifth embodiment.

The operation of the above configuration will be described with reference to FIG. It should be noted that steps 17 to 33 in FIG. 10 are the same as those in the above-described first embodiment, and a description thereof will be omitted.

In step 17 of FIG. 10, the variable a indicating the number of times the heater 9 has been energized is cleared, in step 52 the control means 51 detects the frequency of the power supply by the power supply frequency detection means 50, and in step 56 or step 57. If the value of the frequency detected at 6 is a value of 65 Hz or more or a value of 45 Hz or less, which is a value that deviates significantly from the standard value, before the heater 9 is energized in step 58, A first predetermined time t1 that creates a constant air flow at
The second predetermined time t2 for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped is uniquely determined.

As a result, even when the value of the power supply frequency cannot be accurately detected due to an instantaneous power failure or noise, the blowing time (first time) for creating a constant air flow in the cleaning tank 1 before the energization of the heater 9 is started. 1) and the air cooling time (second predetermined time) for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped. The temperature in the cleaning tank 1 can be accurately detected.

(Embodiment 7) As shown in FIG. 11, the power supply frequency detecting means 60 is for detecting the frequency of the commercial power supply using the equipment, and the storing means 61 is the power supply frequency detecting means 60. The detected frequency value of the power supply is stored. The control means 62 sets the average value of the frequencies stored in the storage means 61 as the frequency of the true power source, calculates the first predetermined time t1 and the second predetermined time t2 corresponding to the value of this frequency, and the drying process At heater 9
When performing the intermittent operation, after the blower fan 11 is operated for the first predetermined time t1, the blower fan 11 and the heater 9 are operated to dry the dishes 2 and the operation of the heater 9 is stopped, and then the blower is blown. The fan 11 is configured to operate for the second predetermined time t2. The other structure is the same as that of the first embodiment.

The operation of the above structure will be described with reference to FIG. Note that step 17 and step 19 to step 33 in FIG. 12 are the same as those in the above-described first embodiment, and therefore description thereof will be omitted.

In step 17 of FIG. 12, the variable a indicating the number of times the heater 9 has been energized is cleared, in step 52 the control means 62 detects the frequency f of the commercial power supply by the power supply frequency detection means 60, and in step 63. The average value fave of the frequency previously stored in the storage means 61 is called, and step 6
In step 4, a new average value fave of frequencies is calculated from fave and the frequency f measured this time, and in step 65, the calculated average value fave of frequencies is stored in the storage means 61.

Then, in step 66, the average value fave of the frequencies calculated this time is set as the true frequency f, and in step 53
From step 55 to step 55, before the heater 9 is energized corresponding to the frequency f, the heater 9 is energized for the first predetermined time t1 in which a constant air flow is generated in the cleaning tank 1. Second for cooling the residual heat of the heater 9 even after stopping the
The predetermined time t2 of is calculated.

As a result, the blowing time (first predetermined time) for producing a constant air flow in the cleaning tank 1 before starting the energization of the heater 9 without being affected by the frequency variation of the commercial power source. With this, the air cooling time (second predetermined time) for cooling the residual heat of the heater 9 can be stably calculated even after the power supply to the heater 9 is stopped, and the temperature detecting means 10 causes the inside of the cleaning tank 1 to cool. The temperature of can be detected accurately.

In the above description, the control means 62 uses the average value of the frequencies stored in the storage means 61 as the frequency of the true power source, but the frequency with the highest detection degree may be the frequency of the true power source. .

(Embodiment 8) As shown in FIG. 13, the storage means 67 stores the number of times the device has been used. The control means 68 calculates the first predetermined time t1 and the second predetermined time t2 corresponding to the number of times of use, and when performing the intermittent operation of the heater 9 in the drying process, controls the blower fan 11 to the first predetermined time. After operating for a time t1, the blower fan 11 and the heater 9 are operated to dry the tableware 2, and after the operation of the heater 9 is stopped, the blower fan 11 is operated for a second predetermined time t2. ing. The other structure is the same as that of the first embodiment.

The operation of the above configuration will be described with reference to FIG. It should be noted that step 17 and steps 19 to 33 in FIG. 14 are the same as those in the above-described first embodiment, and therefore description thereof will be omitted.

In step 17 of FIG. 14, the variable a indicating the number of times the heater 9 is energized is cleared, and in step 69, the number of times of use of the device previously stored in the storage means 67 is called,
In step 70, the number of times of use is added, and in step 71, the value of the added number of times of use is stored in the storage means 67.
Then, as shown in step 72 to step 74, before starting to energize the heater 9 corresponding to the value of the number of times of use,
First predetermined time t for creating a constant air flow in the cleaning tank 1
1 and a second predetermined time t2 for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped is calculated.

When the number of times of use increases, the time required for the blower fan 11 to start up increases due to deterioration of the blower fan 11 due to secular change. Therefore, a certain amount of air is kept in the cleaning tank 1 before the heater 9 is energized. The blast time (first predetermined time) for creating the flow of is lengthened.

As a result, the blower fan 1 due to secular change
Even when the time required for the blower fan 11 to start is increased due to the deterioration of No. 1, before the power supply to the heater 9 is started,
An air blowing time (first predetermined time) for creating a constant air flow in the appropriate cleaning tank 1 and an air cooling time (second time) for cooling the residual heat of the heater 9 even after the power supply to the heater 9 is stopped. Can be calculated, and the temperature in the cleaning tank 1 can be accurately detected by the temperature detecting means 10.

[0064]

As described above, according to the invention described in claim 1 of the present invention, a washing tank for storing dishes and the dishes
The heating means for drying the steam and the steam in the cleaning tank are discharged to the outside of the machine.
It is attached to the blower fan and the bottom of the cleaning tank.
A temperature detecting means is, washing of the dishes, rinsed, and control means for controlling a series of sequential operations of the drying step, wherein, after completion of draining of heating rinsing cycle, the heating means in the drying step When performing the intermittent operation, after operating the blower fan for a first predetermined time, the blower fan and the heating means are operated to dry the dishes, and then the operation of the heating means is stopped , Since the blower fan is configured to operate for the second predetermined time, the heating means is operated to operate the blower fan for a predetermined time to create a constant air flow in the cleaning tank before operating the heating means. The air heated by the heater is not biased to the vicinity of the temperature detecting means, and even after the power supply to the heating means is stopped, the blower fan is operated for a predetermined time, so that the heat remaining in the heating means is excessive. Near the temperature detection means Since it does not heat, the temperature detecting means can accurately detect the temperature in the cleaning tank, and the temperature of the heating means can be precisely controlled, so that the drying performance of tableware can be improved. .

According to a second aspect of the present invention, there is provided a power supply voltage detecting means for detecting the voltage of the commercial power supply .
Predetermined time and second predetermined time, the power supply voltage or we have constructed so that the output calculated in response to the voltage value detected by the detecting means, the power supply voltage value of the various environments used in dishwasher In contrast, the blowing time that creates a constant flow of air in the cleaning tank before the heating means is energized, and the air cooling time for cooling the residual heat of the heating means even after the energization of the heating means is stopped. Can be calculated, and the temperature in the cleaning tank can be accurately detected by the temperature detecting means.

[0066] According to the invention described in claim 3, a power supply voltage detecting means for detecting the voltage of the commercial power supply, first
Predetermined time and second predetermined time, when exceeding the predetermined range value of the voltage detected by the power supply voltage detection means is set in advance, because you configured so that a determined one defined manner, instantaneous power failure or noise Even if the value of the power supply voltage cannot be accurately detected due to this, the air blowing time that creates a constant flow of air in the cleaning tank before the energization of the heating means and the heating even after the energization of the heating means is stopped The air cooling time for cooling the residual heat of the means can be appropriately determined, and the temperature detection means can accurately detect the temperature in the cleaning tank.

According to a fourth aspect of the present invention, the storage device for storing the voltage value of the commercial power supply is provided, and the first predetermined value is provided.
The time and the second predetermined time, the average value of voltage values higher voltage value or stores the most detected degree stored in the storage means as a true voltage value, the output calculated in response to the voltage value <br Since it is configured as described above, the blowing time for creating a constant air flow in the cleaning tank before the energization of the heating means and the energization of the heating means are not affected by the variation of the power supply voltage value. Even after stopping, the air cooling time for cooling the residual heat of the heating means can be calculated, and the temperature in the cleaning tank can be accurately detected by the temperature detection means.

According to a fifth aspect of the present invention, there is provided power source frequency detecting means for detecting the frequency of the commercial power source,
Of the first predetermined time and second predetermined time, exits calculated to correspond to the value of the frequency detected by the power supply frequency detecting means
Because it configured so that Re, even for power frequency by various regional differences used in dishwasher, a blowing time to make a steady stream of air in the cleaning tank before starting the current supply to the heating means, Even after the power supply to the heating means is stopped, the air cooling time for cooling the residual heat of the heating means can be calculated, and the temperature detecting means can accurately detect the temperature in the cleaning tank.

According to the sixth aspect of the invention, there is provided a power supply frequency detecting means for detecting the frequency of the commercial power supply,
The first predetermined time and second predetermined time, and if the difference exceeds a predetermined range the value of the frequency detected by the power supply frequency detecting means is preset, because you configured so that the determined one defined manner, momentary power failure Even if the value of the power supply frequency cannot be accurately detected due to noise or noise, before starting the energization of the heating means, the blowing time to create a constant air flow in the cleaning tank and after stopping the energization of the heating means Also, the air cooling time for cooling the residual heat of the heating means can be appropriately determined, and the temperature detection means can accurately detect the temperature in the cleaning tank.

According to the invention of claim 7, there is provided a storage means for storing the frequency of the commercial power source, and the first predetermined value is provided.
The time and the second predetermined time correspond to the frequency of the highest power detection degree stored in the storage means or the average value of the stored frequencies as the true power supply frequency, and correspond to the value of this frequency.
Because it configured so that the output calculated Te, without being affected by variations in the frequency of the commercial power source, a blowing time to make a steady stream of air in the cleaning tank before starting the current supply to the heating means, the heating means The air cooling time for cooling the residual heat of the heating means can be stably calculated even after the power supply to the heating means is stopped, and the temperature in the cleaning tank can be accurately detected by the temperature detecting means.

According to the invention described in claim 8, there is provided a storage means for storing the number of times the device has been used, and the first predetermined time
During and of the second predetermined time, exits calculated to correspond to the number of uses
Re because you configured so that, due to deterioration of the blower fan due to aging, even with increasing time the blower fan is required until activation, a constant stream of air in the cleaning tank before starting the current supply to the heating means It is possible to calculate the air blowing time for making the air and the air cooling time for cooling the residual heat of the heating means even after the power supply to the heating means is stopped, and the temperature detection means can accurately detect the temperature in the cleaning tank. You can

[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] Flow chart of main operation of the dishwasher

FIG. 3 is a system configuration diagram of a dishwasher according to a second embodiment of the present invention.

FIG. 4 is an operation flowchart of main parts of the dishwasher.

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

FIG. 6 is a system configuration diagram of a dishwasher according to a fourth embodiment of the present invention.

[Fig. 7] Flow chart of main operation of the dishwasher

FIG. 8 is a system configuration diagram of a dishwasher according to a fifth embodiment of the present invention.

FIG. 9 is a flowchart showing the main operation of the dishwasher.

FIG. 10 is an operation flowchart of essential parts of the dishwasher according to the sixth embodiment of the present invention.

FIG. 11 is a system configuration diagram of a dishwasher according to a seventh embodiment of the present invention.

FIG. 12 is a flowchart showing the main operation of the dishwasher.

FIG. 13 is a system configuration diagram of a dishwasher according to an eighth embodiment of the present invention.

FIG. 14 is an operation flowchart of main parts of the dishwasher.

FIG. 15: System configuration diagram of a conventional dishwasher

[Explanation of symbols]

1 cleaning tank 2 tableware 9 Heater (heating means) 11 Blower fan 16 Control means

─────────────────────────────────────────────────── ─── Continuation of front page (72) Takashi Miyauchi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Fumihiko Sasahara, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-1-37923 (JP, A) JP-A-5-91969 (JP, A) JP-A-3-97425 (JP, A) JP-A-4-220228 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 15/46 A47L 15/48

Claims (8)

(57) [Claims] 1. A washing tank for storing dishes, a heating means for drying the dishes, a blower fan for discharging steam in the washing tank to the outside of the machine, and a bottom portion of the washing tank.
Temperature detecting means and control means for controlling a series of sequential operations of washing, rinsing, and drying steps of the tableware, and the control means includes the heating means in the drying step after draining of the heating and rinsing step. When performing the intermittent operation, after operating the blower fan for a first predetermined time, the blower fan and the heating means are operated to dry the dishes, and then the operation of the heating means is stopped , A dishwasher configured to operate the blower fan for a second predetermined time. 2. A power supply voltage detecting means for detecting the voltage of a commercial power supply, wherein the first predetermined time and the second predetermined time are
In response to the voltage value detected by the power supply voltage detection means
Dishwasher according to claim 1, wherein configured to so that the output calculated. 3. A power supply voltage detecting means for detecting a voltage of a commercial power supply, wherein the first predetermined time and the second predetermined time are
It said power supply voltage when the value of the voltage detected by the detecting means exceeds a predetermined range set in advance, dishwasher of claim 1, wherein configured to so that the determined one defined manner. 4. A storage means for storing the voltage value of the commercial power source, wherein the first predetermined time and the second predetermined time are the voltage value with the highest detection degree stored in the storage means or the stored voltage value. of the average value as the true voltage value, dishwasher of claim 1, wherein configured to so that the output calculated in response to the voltage value. 5. A power supply frequency detecting means for detecting the frequency of the commercial power supply, wherein the first predetermined time and the second predetermined time correspond to the value of the frequency detected by the power supply frequency detecting means. dishwasher according to claim 1, wherein configured to so that the output calculated Te. 6. A power supply frequency detecting means for detecting a frequency of a commercial power supply, wherein a value of the frequency detected by the power supply frequency detecting means is preset for a first predetermined time and a second predetermined time. If it exceeds the predetermined range, one defined manner determined
Dishwasher according to claim 1, wherein configured to so that the. 7. A storage means for storing the frequency of the commercial power source, wherein the first predetermined time and the second predetermined time are the frequency with the highest detection degree stored in the storage means or the average value of the stored frequencies. was the frequency of true power, claim 1 configured to so that the output calculated to correspond to the value of this frequency
The listed dishwasher. 8. comprising a storage means for storing the number of times of use of the apparatus, the first predetermined time and second predetermined time, dishwashing according to claim 1, wherein configured to so that the output calculated in correspondence to the number of uses Machine.