JP2002034885A - Dishwashing dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwashing dryer capable of minimizing a lag in remaining time until the end of the operation process and nearly correctly displaying. SOLUTION: After remaining time judgment processing for the washing process (S16), minimum remaining operation time is set at a total (S43) of predicted high temperature rinsing time, drying time, drainage time before drying and the like by remaining time reduction processing (S17). During the washing process, when remaining display time reaches the minimum time (S43), at the point of reaching, the display of remaining operation time is maintained, and a lag from the actual operation time is minimized. After remaining time judgment processing (S26) for the high temperature rinsing process, minimum remaining operation time is changed to a total of drying time, drainage time before drying and the like (S42) by remaining time reduction processing (S17) as in the washing process, whereby a great lag in remaining operation time displayed before drying simultaneously with the start of drying can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to display control in a dishwasher.

[0002]

2. Description of the Related Art In a dishwasher / dryer, tap water is introduced into a washing / drying chamber, stored in the bottom of the washing / drying chamber, and a washing pump is operated to suction the stored water and jet water vigorously from a nozzle. There is also known a configuration in which tableware stored in a tableware basket in a washing and drying room is washed.

The cleaning performance greatly depends on the temperature of water used for cleaning, and the higher the temperature of water, the better the stain removal and the shorter the time. Therefore, during a washing operation or a partial rinsing operation, the stored water is heated to a predetermined temperature using a heater provided at the bottom of the washing and drying chamber, and the rinse is easily performed using the warm water. To do. However, if the operation is temporarily stopped or the door is left open before the water reaches the predetermined temperature, the total required time from the start of washing to the end of drying greatly varies. As a result, the displayed remaining time is different from the actual operation time.

In order to solve such a problem, the present applicant disclosed in Japanese Patent Application No. 11-109967 that the remaining time can be displayed almost accurately irrespective of the temporary stop during operation or the operation with the door open. We propose a dryer.

[0005] As an example of the control in this new dishwasher / dryer, for example, the water temperature immediately after water is supplied by the control means for the remaining time is measured, and the washing and drying is performed when one minute has elapsed since the start of the washing operation. Measure the water temperature in the drying room, and
The water temperature when 3 minutes have passed is measured in the same manner.
The amount of tableware and the ambient temperature are estimated based on the temperature rise of the water obtained from the two detected water temperatures, and the remaining time is displayed. Further, the remaining time is corrected using the above-mentioned initial water temperature even after the operation is temporarily stopped or the door is opened.

As described above, according to the novel dishwasher / dryer, there is an advantage that a difference in the remaining time caused by an external factor during operation can be corrected, and a substantially accurate remaining time can be displayed.

[0007]

DISCLOSURE OF THE INVENTION The dishwasher and dryer
Although the amount of tableware used in each meal is almost fixed,
There are many cases where tableware is added to the tableware basket due to a pause or opening of the door during operation, and there are many cases where the tableware was set at the start of washing, but the number of dishes increases by setting the tableware halfway Sometimes. It is also conceivable that the tableware set due to sudden circumstances is not washed with a dishwasher and taken out of the tableware basket during operation and hand-washed. To perform the above operation, it is necessary to temporarily stop the operation and open the door, and every time the amount of tableware is increased or decreased, the water temperature in the washing and drying room does not rise, resulting in a long operation time. .

In such a case, according to the conventional control, the display error of the remaining time may increase for the following reasons.

That is, when the washing and drying chamber is of a stainless steel type, even if the dishes are taken in and out during the washing operation, the water temperature detection can be performed again each time as in the conventional case, so that there is no difference in the remaining time. If the washing and drying chamber is of resin type, if the operation is stopped halfway before completion of washing, etc., or if the door is left open, it will take several minutes (actually three minutes) to detect again. In addition, the value of water temperature detection cannot be measured instantaneously because of resin. As a result, the actual water temperature does not rise due to the stop time during the operation, so that the operation time becomes longer, and a large deviation occurs as compared with the displayed remaining time.

For example, when hot water is connected to supply hot water to the washing and drying chamber, the operation time can be shortened because the use of hot water eliminates the need to raise the water temperature. Therefore,
The remaining time from the water temperature detection at the start of washing is displayed less. However, if the operation is paused several minutes before the end of washing and the door is left open with a few minutes before the remaining time cannot be detected again, when the operation is restarted, the remaining time is subtracted from the value displayed before the operation was stopped. You. That is, although the operation time is short from the beginning due to the hot water supply connection, the actual operation time is prolonged by stopping the operation at the above timing. On the other hand, the display of the remaining time is decremented earlier until the drying time, which is the final fixed time, is 20 minutes. Therefore, in severe cases, the drying time is 20 times even during washing and rinsing.
The minutes are displayed for a long time. As a result, when the remaining time is re-examined again by detecting the water temperature in the high-temperature rinsing process, the remaining time suddenly decreases by 20%.
It reverts greatly from minutes, and as a result, a large error occurs in the remaining time display. The user may erroneously determine that the device has failed due to the change in the remaining time display.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to minimize the deviation of the remaining time until the end of the operation stroke and to accurately display the time. It is an object of the present invention to provide a dishwasher which can be used.

[0012]

According to a first aspect of the present invention, there is provided a washing and drying chamber for accommodating dishes, water supply means for supplying water to the washing and drying chamber, and the washing for washing dishes. A nozzle for injecting water supplied into the drying chamber into the dishes, and heating means for heating the water in the cleaning and drying chamber in a washing step and at least one high-temperature rinsing step,
Temperature detection means for detecting the temperature of water in the washing and drying chamber, remaining time calculation means for detecting the water temperature in the early stage of the washing process by the temperature detection means, and calculating the remaining operation time since then, and the remaining time calculation And a time display means for displaying the remaining operation time obtained by the means while reducing the remaining operation time as the operation proceeds, wherein the minimum operation time calculated by the remaining time calculation means is the high temperature. The operation time required for the operation after the rinsing step including the rinsing step is determined in advance, and if the remaining operation time displayed by the time display means has reached the minimum time, the washing operation has not been completed. The means is characterized in that the reduction of the remaining operation time is interrupted until the washing operation is completed.

According to the above configuration, the minimum time of the remaining operation time displayed by the time display means is set to the operation time required for the operation after the rinsing stroke including the high-temperature rinsing stroke (the predicted time of the high-temperature rinsing, the drying time, the drying time). (The sum of the previous drainage time, etc.), the water temperature drops due to operation stoppage during the washing process, the actual operating time becomes longer, and even if there is an error with the displayed remaining operating time, the washing process Since the reduction of the minimum remaining operation time is suspended until the operation is completed, the difference in the remaining operation time can be minimized. It is possible to prevent the time from reversing greatly.

In the configuration according to a second aspect of the present invention, the remaining time calculating means detects the water temperature in the early stage of the high-temperature rinsing stroke and estimates the remaining operating time again. The display is modified, and the minimum time of the remaining operation time displayed by the time display means is changed to a time required until the end of all the strokes including the high-temperature rinsing stroke and the drying stroke.

According to the above configuration, when the remaining operation time is detected again during the high-temperature rinsing stroke, the minimum time of the remaining operation time is also changed,
The required operation time (total value of the drying time, drainage time before drying, etc.) until the end of the entire process including the drying process after the high-temperature rinsing process is used, so the difference between the actual operating time and the displayed remaining time is calculated. The remaining time indicated before drying does not largely shift at the same time as drying starts.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a dishwasher according to the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view showing the entire structure of a dishwasher according to this embodiment. A washing / drying chamber 2 also serving as a drying chamber is disposed inside the machine casing 1, and a door 3 whose lower end is pivotally supported at a front opening of the cleaning / drying chamber 2 in a forward direction (see FIG. 1). (In the direction of arrow P). A rotatable arm 4 having a plurality of nozzles 5 formed on the upper surface is provided at the center of the bottom of the washing and drying chamber 2. At the bottom of the washing / drying chamber 2, a water tank 6 provided with a circulation port 7 and a drain port 8 at the side thereof is provided in communication with each other. A mesh-shaped filter 9 for collecting the run-down residuals is provided.

A cleaning and drainage pump 10 is disposed below the bottom of the cleaning and drying chamber 2. Cleaning and drainage pump 10
The impeller rotates in both left and right directions,
At the time of washing, the impeller rotates in a predetermined direction to send out the water sucked from the circulation port 7 of the water storage tank 6 to the arm 4, while at the time of drainage, the impeller rotates in the opposite direction and sucks the water from the drain port 8 of the water storage tank 6. The drainage water is discharged to the outside through the drain hose 11. Water supplied from the outside through the water supply valve 12 is poured into the cleaning / drying chamber 2 from a water supply port 13 provided behind the cleaning / drying chamber 2. A water level detection chamber 14 having a float (not shown) for detecting the water level in the washing and drying chamber 2 is disposed behind the washing and drying chamber 2, and the water in the washing and drying chamber 2 is not shown. The water also flows into the water level detection chamber 14 through the communication port. The bottom of the cleaning and drying chamber 2 has a loop shape for making a large round around the rotation axis of the arm 4 to warm the cleaning water and the rinsing water and to increase the temperature of the air in the cleaning and drying chamber 2 during drying. Heater 15 is provided.

A fan motor 1 is provided at the rear of the washing and drying chamber 2.
A blower fan 16 is provided which is driven to rotate by the fan 7. When the blower fan 16 is rotated, the outside air sucked from an intake port 18 formed on the back surface of the machine frame 1 flows into the washing and drying chamber 2. be introduced. In addition, the humid air in the cleaning / drying chamber 2 is discharged to the outside through an exhaust port 19 provided at the upper part of the door 3. Further, a temperature sensor 35 composed of a thermistor is attached to the outside of the bottom wall of the washing and drying chamber 2.
This mounting position is just behind the place where water is stored in the washing and drying chamber 2 when the water is stored. Further, during the drying process, the air sent by the blower fan 16 does not directly contact the mounting position of the temperature sensor 35, so that the temperature sensor 35 can accurately detect the temperature in the cleaning and drying chamber 2.

FIG. 2 is a plan view of an operation panel 20 provided below the door 3 of the dishwasher. The operation panel 20 includes a power switch 21, a start key 2
2, a plurality of indicator lamps 2 that are provided with a course selection key 23 and a hot water supply switching key 24 and that indicate the selected course.
5. An indicator 26 for displaying the remaining time as a numerical value, and an indicator light 27 for selecting hot water supply or water supply are provided.
In FIG. 2, the display 26 is a segment display, but may be another display such as a dot matrix. The start key 22 also serves as a pause key. When the start key 22 is pressed during the driving operation, the operation is temporarily stopped at that time, and when the start key 22 is pressed again from that state, the operation is first stopped. The operation is resumed from the point where it was interrupted.

FIG. 3 is a block diagram of the electrical system of the main part of the dishwasher of this embodiment. The control unit 30 includes a CPU 31, a ROM
The microcomputer 32 mainly includes a microcomputer including a RAM 32, a RAM 33, a timer 34, and the like. The ROM 32 stores a control program for performing an operation described later. The functions described later are achieved by the CPU 31 executing various calculations and processes according to the control program. An operation signal is input to the control unit 30 from a power switch 21, a start key 22, a course selection key 23, and the like provided on the operation panel 20, and a detection signal is input from the temperature sensor 35. In this embodiment, the temperature sensor 35 detects the temperature in 0.5 ° C. steps. The control unit 30 causes the display 26 to perform a predetermined display and, if necessary, the buzzer 36.
Sound. Further, the control unit 30 controls the operations of the water supply valve 12, the cleaning / draining pump 10, and the fan motor 17 via the load driving unit 37.

FIG. 4 is a flowchart showing the flow of the entire process in the dishwasher, and FIG. 5 is a graph showing an example of a change in the temperature detected by the temperature sensor 35 when the standard course is operated. In the example shown in FIG. 5, it is assumed that water having a water temperature of about 20 ° C. is supplied at the time of water supply in each step.

The operation of the dishwasher will be schematically described with reference to FIGS. 4 and 5. The user stores the tableware in a tableware basket (not shown), opens the door 3 and installs the tableware inside the washing and drying chamber 2. When an operation start is instructed by a predetermined operation, first, a washing step is executed (step S).
1). Specifically, the water supply valve 12 is opened according to an instruction from the control unit 30, and a predetermined amount of water is stored at the bottom of the washing and drying chamber 2. After the water supply is completed, when the washing and draining pump 10 is driven, the washing and draining pump 10 sucks water from the circulation port 7 of the water storage tank 6 and sends out the water to the arm 4. The water rushes out of the small-diameter nozzle 5 and the arm 4 rotates by the reaction of the jet of water. The jetted water hits the dishes and flows down to the bottom of the washing and drying chamber 2, where solid matter is removed by the filter 9 and circulated to the water storage tank 6. During the washing operation, the heater 15 is energized, and the stored water is heated by the heater 15, and the temperature rises substantially linearly as shown in the washing process in FIG.

When the water temperature reaches a predetermined temperature (58 ° C. in this example), the washing operation is terminated, and the washing and drainage pump 10
Is driven to function as a drainage pump,
The water sucked from the drain port 8 is discharged to the drain hose 11.

Next, a rinsing step is performed (step S2). Specifically, the water supply valve 12 is opened as in the washing process, and clean water for rinsing is newly introduced into the washing and drying chamber 2. At this time, the heater 15 is not operated, but the water introduced into the cleaning / drying chamber 2 by the residual heat becomes warm water. Then, similarly to the cleaning operation, the cleaning and drainage pump 10 is driven so as to function as a cleaning pump, a rinsing operation for about one minute is performed, and then the water in the cleaning and drying chamber 2 is discharged. In this example, such rinsing is repeated three times (steps S2a, S2b, S2
c).

Thereafter, a high-temperature rinsing step is performed as the final rinsing (step S3). Specifically, the water supply valve 12 is opened as in the washing and rinsing steps, and clean water is newly introduced into the washing and drying chamber 2. After the water supply is completed, the washing and draining pump 10 is driven to function as a washing pump. Further, the heater 15 is driven, and the temperature of the stored water rises as the operation is continued. When the water temperature reaches a predetermined temperature (in this example, 70 ° C.), the high-temperature rinsing operation is terminated. By performing the final rinsing step using hot water in this way, the dishes can be sterilized and the dishes can be warmed, so that quick drying can be performed in the next drying step. After the high-temperature rinsing, the water remaining at the bottom of the washing / drying chamber 2 is drained, the outside air is sent into the washing / drying chamber 2 by rotating the blower fan 16, and the air is heated by the heater 15 to dry the dishes. (Step S4).

As described above, in the washing step in step S1 and the high-temperature rinsing step in step S3, the water introduced into the washing / drying chamber 2 is heated until each of them rises to a predetermined temperature. Fluctuates greatly depending on the water temperature, the ambient temperature, the amount of tableware, and the like. On the other hand, the time required for the other rinsing and drying steps is a fixed time that is predetermined for each course.

Hereinafter, the control operation relating to the time display in the dishwasher will be described in detail. 6 is a flowchart of a main routine of time display control in the dishwasher, FIG. 7 is a flowchart showing a subroutine of a remaining time subtraction process in FIG. 6, and FIG. 8 shows an example of a display on the display 26 during an operation period. FIG. FIG.
In the figure, lighting is indicated by a solid line, and blinking is indicated by a dotted line.

Here, the control of the time display when the start key 22 is pressed after the standard course is selected by operating the course selection key 23 on the operation panel 20 will be described. For simplicity of explanation, the time required for water supply and drainage is ignored.

The power switch 21 is pressed (step S1).
0) When the standard course is selected by operating the course selection key 23 (step S11), the initial scheduled required time predetermined for each course is read from the ROM 32 and displayed on the display 26 (step S11). S12). This initial scheduled time is based on standard tap water temperature, ambient temperature,
This is a time previously determined by an experiment or the like assuming the amount of tableware. Initial scheduled time for standard course is 7
Assuming that the time is 5 minutes, the display 26 is lit up as shown in FIG. The user sees this display,
You can know the approximate required time until the end of operation.

When the user presses the start key 22 (step S13), the remaining time determination request flag F1 is set to "1", and the remaining time recalibration request flag F2 is reset (step S14). Further, the timer 34 for measuring the determination time is reset (step S
15). Thereafter, a remaining time determination process is performed (step S16).

When the remaining time determination processing (step S16) is executed, the previously displayed number "75" changes to a blinking display, as shown in FIG. 8B. Then, when two minutes and 50 seconds have elapsed since the start of timing of the timer 34 by the progress of the washing operation, the initial scheduled required time (here, 7
The blinking display of (5 minutes) is changed to the blinking display of the symbol [−−] (see FIG. 8C). When three minutes have passed since the start of timing by timer 34,
The temperature detected by the temperature sensor 35 at that time is stored in the RAM 3
3 is stored. The remaining time calculated by the remaining time determination process (step S16) is displayed on the display 26 as shown in FIG. 8D.

Thus, the accurate remaining time is displayed when three minutes have elapsed from the start of the washing operation, but the initial scheduled required time is two minutes and fifty seconds until the first three minutes have elapsed. Flashing display. The user can recognize that this numerical value is an approximate value, and for the next 10 seconds, the symbol [−−] is blinking, so that it is possible to recognize that the remaining time is being determined. it can. Therefore, for example, the initial display time is 75 minutes, and 6 minutes after the lapse of 3 minutes.
Even if the display is switched to a discontinuous display such as 9 minutes or 78 minutes, the user will not be confused.

After three minutes have passed since the start of the washing operation, the flag F
Since 1 is “0”, the process proceeds from step S16 to step S17, and the remaining time subtraction process (step S1)
7) is executed, and then the process returns to the main routine.

The remaining time subtraction process (step S17) is mainly intended to prevent the display of a misleading display due to the remaining time being shifted even if the temporary stop and the door open state are executed during the driving process. It is intended to be. While driving,
Since the start key 22 functions as a pause key,
When this key is pressed, the control unit 30 temporarily suspends the operation at that time. During the interruption of the operation, the subtraction of the remaining time is naturally stopped. If the start key 22 is pressed during the suspension, the control unit 30 returns to the state immediately before the suspension and restarts the operation. If the user performs a pause operation,
The door 3 is often opened and closed once, and cold outside air flows into the washing / drying chamber 2 to lower the internal temperature. In addition, even if the door 3 is not opened or closed, the heater 15 is also shut off during the temporary stop, so that the temperature of the stored water slightly decreases. For this reason, the time required from the restart of operation to the end of operation tends to be longer than that calculated. Therefore, in the remaining time subtraction process (step S17), after the remaining washing process time determination process (step S16), the minimum time of the remaining operation time display is changed to the predicted time of the high-temperature rinsing process, the drying time, and the drainage time before the drying process. Total value of time etc. (Step S4
3) is set. As a result, even if the water temperature drops due to the stoppage of the operation during the washing process and the washing operation time from the start of re-operation is extended, the minimum time of the remaining operation time is not subtracted until the washing operation is completed, and the operation is interrupted. The difference between the operation time and the displayed remaining time can be minimized.

That is, as shown in FIG. 7, it is determined whether the remaining time during the washing process has been determined (step S40). If it is not after the remaining time determination processing, the process proceeds from step S40 to step S48, in which the initial required time is blinked,
The process is continued until the remaining time determination process is performed. If it is determined that the remaining time of the washing process has been determined, the remaining time of the high-temperature rinsing process has not been determined (step S41).
The minimum time of the remaining operation time is set to the sum of the high-temperature rinsing time, the drying time, the drainage time before drying, and the like (step S43).

Thereafter, whether or not the displayed remaining time is longer than the remaining time set above (step S44).
Is determined, and if it is larger, step S44 → S4
5 → S46, the remaining time is subtracted, and the numerical value of the display 26 is reduced by 1 each time the remaining time is reduced by one minute (step S47). Conversely, if the displayed remaining time is small, the remaining time is not subtracted, the remaining time set as described above is maintained, and the process returns to the main routine.

That is, the remaining time determination processing (step S1)
Since the remaining time determined in 6) is determined by the time previously obtained through experiments or the like, it is almost the same as the actual rise in water temperature, and there is almost no deviation. However, the water temperature in the refrigerator decreases due to a temporary stop due to the tableware being taken in and out during operation or a long period of time when the door is open, and the water temperature must be raised again to a predetermined temperature when restarting. At this time, the displayed remaining time starts to be subtracted again from the remaining time when the operation is stopped, so that a large error occurs between the displayed remaining time and the actual operation time. In particular, when the cleaning and drying chamber is of a resin type, it takes several minutes (actually about 3 minutes) to detect the water temperature again, and it is difficult to detect the water temperature because of the resin. Therefore, since the displayed remaining time is not interrupted and subtracted until the actual washing operation is completed, when the operation is performed after the fixed time of the rinsing stroke, the actual operating time and the displayed remaining time are The display can be performed almost accurately, and the remaining time with the deviation minimized can be displayed.

Then, various processes required for the washing operation are executed (step S18), and it is determined whether the washing operation has been completed (step S19), and the process returns to step S16 until it is determined that the washing operation has been completed.

Returning to FIG. 6, after the washing operation is completed ("Y" in step S19), the water used for the washing operation is drained, and further, in steps S20, S21, and S21.
By repeating the processing of S22 and S23, the remaining time display is reduced by one minute while the rinsing operation is performed. When the predetermined rinsing operation time elapses and the rinsing operation ends (“Y” in step S23), the remaining time determination request flag F1 is set to “1” (step S24), and the timer 24 that counts the determination time is set. It is reset (step S25). Then, the remaining time determination process of the high-temperature rinsing process is executed (step S26).

The remaining time determination process (step S2)
6) The remaining time determination process in the washing process (step S16)
Is very similar to That is, in the remaining time determination process for high-temperature rinsing (step S26), the remaining time is continuously subtracted.
The display is updated every minute. Then, when 2 minutes and 50 seconds have elapsed since the start of the high-temperature rinsing operation, the display at that time changes to blinking as shown in FIG.

When the timer 34 reaches 3 minutes further, the temperature detected by the temperature sensor 35 at that time is stored in the RAM 33. Estimated required time for high-temperature rinsing operation and remaining fixed time (here, drying process time 2
0 minutes) to calculate the remaining time. After the flag F1 is reset, the calculated remaining time is lit on the display 26.

When three minutes have passed since the start of the high-temperature rinsing operation, the remaining time is corrected to a more accurate value.
For 10 seconds before the display is updated, the remaining time displayed before that is blinking, so that the user can recognize that the remaining time is being determined, and the number is displayed when 3 minutes have elapsed. It does not cause confusion if it is reduced or increased by more than 2 minutes.

After three minutes have passed since the start of the high-temperature rinsing operation, the flag F1 is set to 0, so that the remaining time subtraction process of step S17 is executed. This remaining time subtraction processing is performed in the same manner as the processing performed in the washing process, and the difference is that the setting of the minimum operation remaining time is changed to the sum of the drying time and the drainage time before drying (step S42). The point that is raised. This prevents the display of the remaining time from largely reverting before entering the drying time. As described above, the remaining time subtraction process (step S17) is performed, and the numerical value of the display 26 is reduced by 1 each time the remaining time decreases by one minute.

A high-temperature rinsing operation is performed (step S).
28) When the time reaches 10 seconds before the end (step S29)
The display 26 is changed to a blinking display by the processing of step S30 (see FIG. 8 (g)). When the high-temperature rinsing operation is completed ("Y" in step S31), the predetermined drying operation is performed. Is displayed by the processing of step S32 (see FIG. 8 (h)). Although the remaining time is not actually determined for the last 10 seconds of the high-temperature rinsing operation, the display of the remaining time may be discontinuous when the high-temperature rinsing operation is completed and the operation shifts to the drying operation. For this reason, it is possible to avoid confusion of the user by temporarily making the display blink.

Thereafter, the remaining time of the display 26 is reduced each time one minute elapses while performing the drying operation (steps S33, S34, S35). If the drying operation is completed (step S36). ("Y"), the buzzer 36 is sounded (step S37), and the power is automatically shut off (step S38), and all the steps are completed. At this time, the remaining time display on the display 26 shows 0 as shown in FIG. 8 (i) and turns off after a few seconds.

The above description is of the control in the case where the standard course is selected. However, other initial scheduled required time and remaining time determination processing are performed for other speedy courses and Kinkoro courses, and the remaining time subtraction processing is performed. The display control of the remaining time is executed in the same procedure as described above. It should be noted here that when hot water supply is connected, the remaining time is displayed shortly because hot water is supplied into the refrigerator at the beginning of operation, but the actual operation time and display time due to external operations during operation are large. Since it is different, it can be said that the display control of the present invention is effectively exerted. In particular, it is possible to provide a dishwasher capable of minimizing a difference in remaining time to a user on a course such as a speedy course in which the operation time is short from the beginning, and displaying a display almost accurately.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing the overall configuration of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a plan view of an operation panel of the dishwasher according to the embodiment.

FIG. 3 is an electrical configuration diagram of the dishwasher of the present embodiment.

FIG. 4 is a flowchart showing the flow of the entire operation process in the dishwasher of this embodiment.

FIG. 5 is a graph for explaining detection of water temperature by a temperature sensor in all strokes.

FIG. 6 is a flowchart of a main routine of time display control in the dishwasher according to the embodiment.

FIG. 7 is a flowchart showing a subroutine of a remaining time subtraction process in FIG. 6;

FIG. 8 is a diagram showing an example of a display on a display during an operation period.

[Explanation of symbols]

 2 ... Cleaning and drying chamber 5 ... Nozzle 6 ... Water tank 10 ... Cleaning and drainage pump 12 ... Water supply valve 20 ... Operation panel 21 ... Power switch 22 ... Start key 23 ... Course selection key 26 ... Display 30 ... Control unit 31 ... CPU 32 ROM 33 RAM 34 Timer 35 Temperature sensor 36 Buzzer 37 Load drive unit

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masanori Omachi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Kenji Yamane 2-chome, Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Naoki Hayashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. (reference) 3B082 DB01 DC01 EE01 EE02

Claims (2)

[Claims] 1. A washing and drying chamber for accommodating tableware, water supply means for supplying water to the washing and drying chamber, and a nozzle for injecting water supplied to the washing and drying chamber for washing the tableware to the dishes. Heating means for heating water in the washing and drying chamber in a washing step and at least one high-temperature rinsing step; temperature detecting means for detecting the temperature of the water in the washing and drying chamber; and A remaining time calculating means for detecting the water temperature in the early stage of the washing process and calculating a remaining operating time after the time, and a time displaying means for displaying the remaining operating time obtained by the remaining time calculating means while decreasing the remaining operating time as the operation proceeds. In the dishwasher provided with, as the minimum time of the remaining operation time calculated by the remaining time calculation means, the required operation time required for operation after the rinsing stroke including the high-temperature rinsing stroke In the case where the washing operation is not completed even if the remaining operation time determined by the predetermined time and displayed by the time display means is the minimum time, the time display means suspends the decrease of the remaining operation time until the washing operation is completed. Dishwasher and dryer. 2. The remaining time calculating means detects the water temperature at the beginning of the high-temperature rinsing stroke and estimates the remaining operating time again, and the time display means corrects the display at that point in time. A dishwasher / dryer wherein the minimum time of the remaining operation time displayed by the display means is changed to a time required until the end of all the strokes including the drying cycle after the high-temperature rinsing step.