JP2016086835A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher that has suppressed wasteful energy consumption in a drying process while securing sufficient drying of dishes.SOLUTION: A dishwasher 1 includes an operation control part 11 for performing a dish washing operation including a washing process for washing tableware W accommodated in a washing tank 2 and a drying process for drying the tableware W, and a drying time setting part 12 for setting a performance time Tof the drying process so that it is shortened as the performance frequency of the dish washing operations increases from a state in which the dishwasher 1 is new.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a drying process of a dishwasher.

  2. Description of the Related Art Conventionally, a dishwasher installed in a system kitchen or the like performs a dishwashing operation for drying dishes by supplying warm air into the washing tank for a predetermined time after washing dishes in the washing tank (for example, Patent Document 1).

  Moreover, as the number of times of performing the dish washing operation increases, the calcareous component contained in the tap water adheres to the washing tank in which the tableware is stored and appears white and dirty. Then, the dishwasher which performs the washing | cleaning operation in a tank which removes the calcareous component adhering to the washing tank is known (for example, refer patent document 2).

Japanese Patent Laid-Open No. 11-70068 JP 2000-316784 A

  In the dishwasher, the execution time of the drying process of the dishwashing operation is set longer with a margin in order to prevent insufficient drying of the dishes. However, the inventors of the present application have found that the time required for drying the dishes changes according to the number of times the dish washing operation is performed.

  For this reason, if the execution time of the drying process is uniformly increased, the drying of the tableware becomes excessive and energy may be consumed wastefully.

  This invention is made | formed in view of this background, The objective of this invention is providing the dishwasher which suppressed the useless energy consumption in a drying process, ensuring sufficient drying of tableware.

  As a result of intensive studies on the reason why the time required for drying the tableware changes depending on the number of times of performing the tableware cleaning operation, the present inventors have found that the calcareous components adhering to the cleaning tank are involved in the ease of drying the tableware. I found out.

  That is, the inner surface of the washing tub and the tableware basket that holds the tableware are generally formed using a material having water repellency (for example, a resin material). The calcareous component contained in the tap water adheres to the inner surface of the cleaning tank. In this case, since the calcareous component is hydrophilic, characteristics such as the inner surface of the cleaning tank change from water repellency to hydrophilicity as the adhesion of the calcareous component proceeds.

  When the inner surface of the cleaning tank has water repellency, the water droplets attached to the inner surface of the cleaning tank do not spread easily, and the surface area of the water droplets is small, so that the water droplets are difficult to evaporate. As a result, in the drying process, the humidity in the washing tank is prevented from decreasing, and the tableware in the washing tank becomes difficult to dry. On the other hand, when the inner surface of the cleaning tank has hydrophilicity, water droplets attached to the inner surface of the cleaning tank easily spread, and the surface area of the water droplets increases, so that the water droplets easily evaporate. As a result, in the drying process, a decrease in humidity in the cleaning tank is promoted, and the tableware in the cleaning tank is easily dried.

  Therefore, the time required for drying the tableware in the drying process is less than that when the inner surface of the washing tank has water repellency, such as when the dishwasher is in a new state. Due to the adhesion of the calcareous component, the time when the inner surface of the cleaning tank has hydrophilicity becomes shorter.

The present invention has been made based on the above findings, and in order to achieve the above object,
A cleaning means for cleaning the tableware stored in the cleaning tank;
A drying means for drying the tableware stored in the washing tank;
In a dishwasher comprising a cleaning step of cleaning dishes by the cleaning means, and a control means for performing a dish washing operation including a drying step of drying the dishes by the drying means,
A drying time setting unit that sets the execution time of the drying step so as to be shortened as the number of execution times of the dishwashing operation from a new state increases (first invention).

  In the first invention, the drying time setting unit sets the tableware when the number of times the dish washing operation is performed from a new state is small, that is, when the amount of adhering calcareous components to the washing tank is small and the inside of the washing tank is difficult to dry. Set a longer execution time for the drying process of the cleaning operation. The drying time setting unit sets the execution time of the drying process of the dishwashing operation when the number of times of performing the dishwashing operation from a new state is large, that is, when the attached amount is large and the inside of the washing tank is easy to dry. Set it short.

  Therefore, according to the dishwasher of this invention, the useless energy consumption in a drying process can be suppressed, ensuring sufficient drying of tableware.

In the first invention,
A tank cleaning means for removing the calcareous component adhering to the cleaning tank;
The control means executes an in-tank cleaning operation for removing the calcareous component by the in-tank cleaning means,
The drying time setting unit sets the execution time of the drying step so as to be shortened as the number of times of performing the dish washing operation after the in-bath cleaning operation is executed (second) invention).

  According to the second invention, the drying time setting unit removes the calcareous component adhering to the washing tank by executing the washing operation in the tank, and when the water repellency of the inner surface of the washing tank is recovered, the subsequent tableware Depending on the number of times of washing operation, when the number of times of dish washing operation is small and the amount of calcareous components adhering to the washing tank is small, the drying time of the dish washing operation is set longer and the number of times of dish washing operation is executed. When the amount of adhesion is large and the amount of adhesion is large, the execution time of the drying process is set short.

  Therefore, it is possible to suppress wasteful energy consumption in the drying process while ensuring sufficient drying of the tableware even after execution of the washing operation in the tank.

In the second invention,
The drying time setting unit sets the execution time of the drying step to be shortened as the number of times of performing the dish cleaning operation from a new state increases before the washing operation in the tank is performed, After the washing operation in the tank is executed, the execution time of the drying step is set so as to be shortened as the number of times of performing the dish washing operation after the washing operation in the tank is increased. (Third invention).

  According to 3rd invention, the structure for counting the frequency | count of execution of the dishwashing operation from the state which is new, and the structure for counting the frequency | count of execution of the dishwashing operation after performing the washing | cleaning operation in a tank, Therefore, the structure of the dishwasher can be simplified.

In order to achieve the above object, the present invention provides:
A cleaning means for cleaning the tableware stored in the cleaning tank;
A drying means for drying the tableware stored in the washing tank;
In-tank cleaning means for removing calcareous components adhering to the cleaning tank,
A dish washing operation including a washing step for washing tableware by the washing means and a drying step for drying the tableware by the drying means is performed, and an in-tank washing operation for removing the calcareous component by the in-tank washing means is performed. A dishwasher equipped with a control means for
A drying time setting unit that sets the execution time of the drying step so as to be shortened as the number of times the dish washing operation is performed after the in-bath cleaning operation is performed is provided (fourth invention) ).

  According to the 4th invention, similarly to the said 2nd invention, the execution time of the drying operation after performing the washing | cleaning operation in a tank is set appropriately, and it is useless in a drying process, ensuring sufficient drying of tableware Energy consumption can be suppressed.

In the second invention to the fourth invention,
The tank cleaning means removes calcareous components adhering to the cleaning tank by operating the cleaning means using a detergent different from the dish washing operation,
In the washing operation in the tank, in the dish washing operation, the washing process may be replaced with a process of removing calcareous components adhering to the washing tank by the washing means in the tank (fifth). invention).

Explanatory drawing which showed the structure of the dishwasher of this embodiment by the cross section. The control block diagram of the tableware washing machine shown in FIG. The graph which shows a dishwashing driving | operation. The flowchart which shows the process of the drying time setting part 12. FIG.

[1. Dishwasher configuration]
As shown in FIG. 1, the dishwasher 1 of the present embodiment has a front drawer type configuration in which a washing tub 2 containing tableware W is housed in an exterior case 3. The cleaning tank 2 has a box shape with an open top, and a door is provided on the front surface of the cleaning tank 2.

  In the dishwasher 1, a water supply pipe 4 for supplying water to the washing tub 2, a drain hose 5 for draining the washing tub 2, and drying for blowing drying air into the washing tub 2 in the exterior case 3. A fan 6, a water level detection tank 7 that communicates with the cleaning tank 2 via the communication pipe 7 b, and a controller 10 that controls the operation of the cleaning tank 2 are provided.

  The water supply pipe 4 is provided with a water supply electromagnetic valve 4 a that opens and closes the water supply pipe 4. The drain hose 5 is provided with a reverse U-shaped rising part 5a for preventing backflow, an air vent part 5b, a drain trap part 5c, and a check valve 5d.

  Inside the washing tub 2, there is a tableware basket 2a for holding the tableware W, a washing nozzle 2b for injecting water stored in the washing tub 2 toward the tableware W held in the tableware basket 2a, and washing. A heater 2c for heating the water stored in the tank 2 and a temperature sensor 2d for measuring the temperature inside the cleaning tank 2 are provided.

  The temperature sensor 2d is configured by, for example, a thermistor. The temperature sensor 2d outputs a detection signal of the water temperature when water is stored in the cleaning tank 2, and the temperature of the atmosphere in the cleaning tank 2 when water is not stored in the cleaning tank 2. A detection signal is output.

  A cleaning / drainage pump 2f connected to the bottom of the cleaning tank 2 via a leftover filter 2e is provided. The washing / drainage pump 2f sprays the water in the washing tub 2 from the washing nozzle 2b toward the dishes W by rotating forward, and drains the water in the washing tub 2 through the drain hose 5 by reversing. To do. Each electrical component (cleaning / drainage pump 2f, water supply solenoid valve 4a, drying fan 6, controller 10, etc.) is driven by electric power supplied from a household power supply via a power cord (not shown).

  The front end 3a of the cleaning tank 2 is provided with a power switch 10a, a start / pause switch 10b, a tank cleaning agent input button 10c, a buzzer 3b, a display 3c, and a tank cleaning request lamp 3d. Behind the power switch 10a and the start / pause switch 10b are a position switch 10d for outputting a signal to the controller 10 when the cleaning tank 2 is stored in the storage position in the outer case 3, and a cleaning agent feeder in the tank. 10e is provided. The tank cleaning agent feeder 10e contains a tank cleaning agent (for example, citric acid). The said tank cleaning agent is a detergent which has the effect | action which removes the calcareous component contained in tap water, and is different from the tableware detergent mentioned later.

  Further, the door is provided with an exhaust passage 8 for discharging the air in the cleaning tank 2 by the drying fan 6. The exhaust passage 8 includes an opening 8a in front of the cleaning tank 2 (left side in FIG. 1), and an exhaust port 8b at the front end of the door.

  A float-type water level switch 7 a is provided inside the water level detection tank 7. The water level switch 7a is configured to output a detection signal to the controller 10 when the water level in the water level detection tank 7 is a predetermined water level.

  Next, the configuration of the control system of this embodiment will be described with reference to FIG.

  The controller 10 is an electronic circuit unit including a memory 13, a CPU (not shown), an interface circuit, and the like. The controller 10 executes a series of dish washing operations and a series of in-bath washing operations by executing a control program for the dishwasher 1 held in the memory 13 by the CPU, and the dish washing It functions as a drying time setting unit 12 that sets the execution time of the drying process in operation.

  The operation control unit 11 stores, as data, a count value 13a for dish washing operation and an in-bath washing operation execution flag 13b as data. The count value 13a of the dishwashing operation is the number of times the dishwasher 1 is executed from the state in which the dishwasher 1 is new before the tank washing operation is executed, and after the tank washing operation is executed. Is the number of times the dishwashing operation has been performed since the most recent tank cleaning operation was performed.

  When the count value 13a of the dish washing operation exceeds a predetermined value, the operation control unit 11 lights the in-bath cleaning request lamp 3d and prompts the user to perform the in-bath cleaning operation. In addition, when the dishwasher 1 has not been executed since the dishwasher 1 is new, the operation control unit 11 turns off the tank cleaning operation execution flag 13b and performs the tank cleaning operation even once. After the execution, the tank cleaning operation execution flag 13b is turned ON.

  The controller 10 receives signals from various operation keys 3e, a temperature sensor 2d, a water level switch 7a, a power switch 10a, a start / pause switch 10b, an in-vessel cleaning agent input button 10c, and a position switch 10d.

  Further, the operation of the buzzer 3b and the display 3c is controlled by a control signal output from the controller 10. The operation of the heater 2c, the cleaning / drainage pump 2f, the water supply electromagnetic valve 4a, the drying fan 6 and the in-vessel cleaning agent feeder 10e is controlled by a control signal output from the controller 10 to the drive circuit 10d.

  The drive circuit 10d supplies predetermined power in response to the input of a control signal from the controller 10, thereby supplying the heater 2c, the cleaning / drainage pump 2f, the water supply electromagnetic valve 4a, the drying fan 6, and the cleaning agent in the tank. The device 10e is operated.

[2. Dishwashing operation]
Next, with reference to FIG. 3, the dish washing operation performed by the operation control unit 11 will be described. In the graph shown in FIG. 3, the vertical axis represents the temperature detected by the temperature sensor 2d, and the horizontal axis represents time (elapsed time from the start of the dishwashing operation). The hatched portion below the graph indicates that the cleaning / drainage pump 2f, the heater 2c, and the drying fan 6 are operating.

  The operation control unit 11 starts the dish washing operation when the user operates the start / pause switch 10b. The dish washing operation is executed by a series of processes, for example, “washing process” → “water rinsing process” → “heat rinsing process” → “drying process”. The operation control unit 11 increases the count value 13a of the dish washing operation by 1 when the dish washing operation is completed.

[2-1. Cleaning process]
In the cleaning process, the operation control unit 11 first opens the water supply electromagnetic valve 4 to store a predetermined amount of water in the cleaning tank 2 and closes the water supply electromagnetic valve 4. At this time, the detergent for tableware in a detergent container (not shown) provided in the tableware basket 2a is dissolved in water.

  Next, the operation control unit 11 operates the heater 2c to heat the water (washing water) stored in the cleaning tank 2, and forwardly rotates the cleaning / drainage pump 2f to perform the cleaning stored in the cleaning tank 2. Water is sprayed from the cleaning nozzle 2b. Accordingly, the cleaning water is circulated in the cleaning tank 2 and the dishes W are cleaned.

Next, the operation control unit 11, when a predetermined time _{T w (= t 1 -t 0} ) has elapsed, the washing and drainage pumps 2f and the heater 2c is stopped to terminate the cleaning process. At this time, the temperature detected by the temperature sensor 2d has risen to around 70 ° C. In the cleaning process, the configuration in which the cleaning / drainage pump 2f and the heater 2c are operated to clean the dishes W accommodated in the cleaning tank 2 corresponds to the cleaning means of the present invention.

[2-2. Water rinsing process]
In the water rinsing process, the operation controller 11 first drains the cleaning tank 2 by reversing the cleaning / drainage pump 2f with the heater 2c stopped. Next, the operation control unit 11 opens the water supply electromagnetic valve 4a, stores a predetermined amount of water in the cleaning tank 2, and closes the water supply electromagnetic valve 4a.

  Next, the operation control unit 11 causes the cleaning / drainage pump 2f to rotate forward and injects water (room temperature water) stored in the cleaning tank 2 from the cleaning nozzle 2b. As a result, room-temperature water is circulated in the washing tank 2, and the dishes W are rinsed by the water sprayed from the washing nozzle 2b. Next, the operation control unit 11 circulates water at room temperature for a predetermined time, and then performs drainage by reversing the cleaning / drainage pump 2f.

Then, the operation control unit 11 accumulates room temperature water in the washing tank 2, circulates the water and rinses the dishes W a predetermined number of times, and a predetermined time T _r1 (= t ₂ −t ₁ ) has elapsed. At that time, the washing / drainage pump 2f is stopped and the water rinsing step is completed. At this time, the temperature detected by the temperature sensor 2d has dropped to around normal temperature.

[2-3. Heat rinsing process]
In the heating and rinsing process, the operation control unit 11 first opens the water supply electromagnetic valve 4a, stores a predetermined amount of water in the cleaning tank 2, and closes the water supply electromagnetic valve 4a.

Next, the operation control unit 11 operates the heater 2c to heat the water stored in the cleaning tank 2, and rotates the cleaning / drainage pump 2f to rotate the water (hot water) stored in the cleaning tank 2. Sprayed from the cleaning nozzle 2b. Thereby, warm water is circulated in the washing tank 2 and the dishes W are rinsed. Then, when the predetermined time T _r2 (= t ₃ −t ₂ ) has elapsed, the operation control unit 11 stops the cleaning / drainage pump 2f and the heater 2c, and ends the heating rinsing process. At this time, the temperature detected by the temperature sensor 2d has reached 70 ° C.

[2-4. Drying process]
In the drying process, the operation control unit 11 first drains the cleaning tank 2 by reversing the cleaning / drainage pump 2f.

Next, the operation control unit 11 operates the drying fan 6 to dry the cleaning tank 2 to dry the dishes W. At this time, the operation control unit 11, the temperature detected by the temperature sensor 2d is thereby intermittently operating the heater 2c so as not to fall below the drying set temperature T _A. Then, when the predetermined time T _d (= t ₄ −t ₃ ) has elapsed, the operation control unit 11 stops the drying fan 6 and the heater 2 c and ends the drying process. The drying process execution time _Td is set by the drying time setting unit 12 described later. In the drying process, the configuration in which the drying fan 6 and the heater 2c are operated to dry the dishes W accommodated in the cleaning tank 2 corresponds to the drying means of the present invention.

[3. In-tank washing operation]
Next, the tank cleaning operation executed by the operation control unit 11 will be described. When executing the washing operation in the tank, the detergent for the dish is not contained in the detergent container inside the dish basket 2a.

  When the user operates the in-tank cleaning agent input button 10c and the start / pause switch 10b, the operation control unit 11 cleans the in-tank cleaning agent previously stored in the in-tank cleaning agent input device 10e. It puts into the tank 2, and performs the washing | cleaning operation in a tank subsequently. The tank cleaning operation is executed, for example, by a series of processes of “in-tank cleaning process” → “water rinsing process” → “heat rinsing process” → “drying process”.

  The washing process in the tank is the same as the washing process in the dish washing operation except that the washing water is heated to 70 ° C. using a washing agent in the tank instead of the dish detergent, and the washing / drainage pump 2f and By operating the heater 2c and circulating the cleaning water containing the cleaning agent in the tank in the cleaning tank 2, the calcareous components and dirt attached in the cleaning tank 2 are removed.

  In addition, the structure which operates the washing | cleaning / drainage pump 2f and the heater 2c, and removes the calcareous component, dirt, etc. which adhered in the washing tank 2 is equivalent to the washing | cleaning means in a tank of this invention.

  In the tank cleaning process, the amount of water stored in the cleaning tank 2 may be made larger than that in the cleaning process of the tableware washing operation so that the trace of the water level attached to the cleaning tank 2 during storage is erased. Further, in the tank cleaning process, the cleaning water may be distributed to every corner of the cleaning tank 2 by intermittently operating the drying fan 6 during normal rotation of the cleaning / drainage pump 2f.

  The water rinsing step, the heating rinsing step and the drying step are the same as the water rinsing step, the heating rinsing step and the drying step in the dish washing operation.

  The operation control unit 11 returns the count value 13a of the dish washing operation to 0 when the in-bath washing operation is completed. Moreover, the operation control part 11 turns ON the tank washing | cleaning operation execution flag 13b when completion | finish of the tank washing | cleaning operation, when performing the tank washing | cleaning operation for the first time from the state in which the dishwasher 1 is new.

  In the present embodiment, when the in-tank cleaning agent input button 10c and the start / pause switch 10b are operated by the user, the in-tank cleaning agent previously stored in the in-tank cleaning agent input device 10e is supplied to the cleaning tank 2. The tank cleaning operation is executed, but the user puts the tank cleaning agent in the detergent container in the tableware basket 2a in advance, and the tank cleaning agent input button 10c and the start / start When the temporary stop switch 10b is operated, a configuration in which only the cleaning operation in the tank is executed without charging the cleaning agent in the tank may be employed.

[4. Setting the execution time of the drying process]
Next, according to the flowchart shown in FIG. 4, the setting process of the drying process execution time (drying time) _Td by the drying time setting unit 12 will be described.

When the drying process of the dish washing operation is executed by the operation control unit 11, the drying time setting unit 12 sets the drying time _Td .

  In STEP 1, the drying time setting unit 12 determines whether or not the washing operation in the tank has been executed in the past in the dishwasher 1, that is, whether or not the washing operation execution flag 13 b in the tank is ON. If it has never been executed, the process proceeds to STEP 2. If it has been executed even once, the process proceeds to STEP 5.

  The drying time setting unit 12 determines whether or not the number of times the dishwashing operation is performed from the state in which the dishwasher 1 is new in STEP 2 is N times (for example, 30 times) or less, that is, the count value of the dishwashing operation. It is determined whether or not 13a is N or less. If it is N times or less, the process proceeds to STEP3. If it exceeds N times, the process proceeds to STEP4.

In STEP 3, the drying time setting unit 12 sets the drying time _Td to _{Td_1} ( _{Td_1} is, for example, 80 minutes), and ends the process.

In STEP 4, the drying time setting unit 12 sets the drying time _Td to _{Td_2} ( _{Td_2} < _{Td_1} , _{Td_2} is 60 minutes, for example), and ends the process.

  The drying time setting unit 12 determines in STEP 5 whether or not the number of times the dish washing operation has been performed since the most recent tank washing operation in the dish washer 1 is N times (for example, 30 times) or less, that is, It is determined whether or not the count value 13a of the dish washing operation is N or less. If it is N times or less, the process proceeds to STEP 6, and if it exceeds N times, the process proceeds to STEP 7.

The drying time setting unit 12 sets the drying time _Td to _{Td_1} in STEP 6 and ends the process.

Drying time setting unit 12, in STEP7, the drying time _{T d} is set to T _{d_2,} the process ends.

In the dishwashing machine 1 of the present embodiment, the number of times of performing the dishwashing operation from the state in which the washing operation in the tank has not been performed in the past and is new is N times or less, or in the latest tank When the number of executions of the dish washing operation after the washing operation is executed is N times or less, the drying process of the dish washing operation is executed for the drying time T _d = T _d — ₁ (80 minutes). For this reason, the dishwasher 1 can sufficiently dry the tableware W even when the amount of the calcareous component adhering to the washing tank 2 or the dish basket 2a is small and the inside of the washing tank 2 is difficult to dry.

Further, in the dishwasher 1, the number of times the dishwashing operation has been performed from a state in which the washing operation in the tank has not been performed in the past exceeds N times, or the latest washing operation in the tank has been performed. When the number of executions of the dishwashing operation after the execution exceeds N times, the execution time of the drying process of the dishwashing operation is shortened to T _d = t _d — ₂ (60 minutes). For this reason, the tableware washing machine 1 can suppress useless energy consumption in a drying process, ensuring sufficient drying of tableware, when the said adhesion amount of a calcareous component is large and the inside of the washing tank 2 is easy to dry.

[5. Other Embodiments]
In this embodiment, although the dishwasher 1 which performs the process different from a dishwashing operation is demonstrated as a washing | cleaning operation in a tank, this invention replaces with the detergent for tableware in a tank as a washing | cleaning operation in a tank. The present invention is also applicable to a dishwasher that performs the same process as the dishwashing operation except that a cleaning agent is used.

  Moreover, although this embodiment demonstrates the dishwasher 1 which performs both a dish washing operation and a tank washing operation, this invention performs the tableware washing operation, but does not perform the tank washing operation. It can also be applied to washing machines. In this case, the drying time setting unit 12 sets the execution time of the drying process according to the number of times of performing the dish washing operation from the new state by the processing of STEP2 to 4 without performing STEP1 of FIG. To do.

  Further, in the present embodiment, as shown in FIG. 4, as the configuration of the present invention, “the drying process execution time is set to be shortened as the number of times of performing the dish washing operation from a new state increases”. Moreover, when the number of executions of the dish washing operation from a new state exceeds N times, the configuration for shortening the execution time of the drying step is used, but other configurations may be used. For example, it is good also as a structure which shortens the execution time of a drying process in inverse proportion to the frequency | count of execution of the frequency | count of tableware washing | cleaning from the state which is new. The same applies to the configuration of “setting to shorten as the number of times the dish washing operation is performed after the in-tank washing operation is performed” of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Dishwasher, 2 ... Washing tank, 2c ... Heater, 2f ... Cleaning / drainage pump, 6 ... Drying fan, 11 ... Operation control part, 12 ... Drying time setting part, _Td ... Execution time of drying process, W ... tableware.

Claims (5)

A cleaning means for cleaning the tableware stored in the cleaning tank;
A drying means for drying the tableware stored in the washing tank;
In a dishwasher comprising a cleaning step of cleaning dishes by the cleaning means, and a control means for performing a dish washing operation including a drying step of drying the dishes by the drying means,
A dishwasher comprising: a drying time setting unit configured to set an execution time of the drying step so that the execution time of the dishwashing operation from a new state increases. The dishwasher according to claim 1,
A tank cleaning means for removing the calcareous component adhering to the cleaning tank;
The control means executes an in-tank cleaning operation for removing the calcareous component by the in-tank cleaning means,
The drying time setting unit sets the execution time of the drying step so as to be shortened as the number of times of performing the dish washing operation after the washing operation in the tank is increased. . The dishwasher according to claim 2,
The drying time setting unit sets the execution time of the drying step to be shortened as the number of times of performing the dish cleaning operation from a new state increases before the washing operation in the tank is performed, After the washing operation in the tank is executed, the execution time of the drying step is set so as to be shortened as the number of times of performing the dish washing operation after the washing operation in the tank is increased. And dishwasher. A cleaning means for cleaning the tableware stored in the cleaning tank;
A drying means for drying the tableware stored in the washing tank;
In-tank cleaning means for removing calcareous components adhering to the cleaning tank,
A dish washing operation including a washing step for washing tableware by the washing means and a drying step for drying the tableware by the drying means is performed, and an in-tank washing operation for removing the calcareous component by the in-tank washing means is performed. A dishwasher equipped with a control means for
A dishwasher comprising: a drying time setting unit configured to set an execution time of the drying step so as to be shortened as the number of times the dishwashing operation is performed after the in-bath cleaning operation is performed. The dishwasher according to any one of claims 2 to 4,
The tank cleaning means removes calcareous components adhering to the cleaning tank by operating the cleaning means using a detergent different from the dish washing operation,
In the washing operation in the tank, the washing step in the dish washing operation is replaced with a step of removing calcareous components adhering to the washing tank by the washing means in the tank. washing machine.