JP5923481B2 - Dishwasher - Google Patents

Description

  The present invention relates to a dishwasher.

  Patent document 1 discloses a dishwasher. This dishwasher can perform a washing process and a drying process. This dishwasher wash | cleans tableware by injecting the water heated with the heater at the washing | cleaning process. In the dishwasher, in the drying process, air heated by a heater is blown by a fan to dry the dishes.

JP 2009-247458 A

  The fan of the dishwasher may break down. In a conventional dishwasher, when a fan failure is detected, the user is informed that the fan has failed, and until the serviceman repairs or replaces the failed fan, the cleaning process, drying process, etc. It is impossible to carry out all driving. However, if the dishwasher cannot be used at all until the failed fan is repaired or replaced, the convenience of the user is impaired. In order to improve the convenience for the user, it is preferable that the dishwasher can be operated as much as possible even after a fan failure is detected.

  In the washing step, the dishes are washed by spraying water that has been heated by a heater to a high temperature. For this reason, the inside of the washing tank which accommodates tableware is filled with high temperature steam. If the fan is turned on and the washing process is performed as usual, the high-temperature steam inside the washing tank is discharged to the outside of the dishwasher for blowing by the fan, which is a problem in terms of safety. Will occur. A technology that can improve user convenience while ensuring safety is expected.

The present specification discloses a dishwasher. The dishwasher can perform a washing process and a drying process. The dishwasher includes a washing tub, a heater for heating water or air inside the washing tub, an intake passage communicating from the outside of the washing tub to the inside of the washing tub, and an inside of the washing tub from the outside of the dishwasher. An exhaust path communicating with the fan, and a fan provided in the intake path. In the washing process, the dishwasher cleans the dishes by spraying water heated by a heater. In the drying process, the dishwasher dries the dishes by blowing air heated by a heater with a fan. The dishwasher makes it possible to perform the washing process in a state in which the heating capacity of the heater is reduced when a fan ON failure is detected.

  According to the dishwasher described above, the user can wash dishes even after the failure of the fan is detected and before the failed fan is repaired or replaced. In the above dishwasher, when a fan ON failure is detected, the washing process can be performed with the heating capacity of the heater reduced, so that high temperature steam is released to the outside of the dishwasher. Can be prevented. User convenience can be improved while ensuring safety. In addition, the state where the heating capacity of the heater is reduced means a state where the output of the heater is low compared to the normal cleaning step, and the cleaning step may be performed with the heater output being reduced, The cleaning process may be performed without any heating by the heater. In addition, the washing step referred to here may be one in which water mixed with detergent (washing water) is sprayed on the dishes, or water in which the detergent is not mixed (rinsing water) is sprayed on the dishes. There may be.

  The dishwasher described above can be configured to enable the cleaning process to be performed in a state where the number and / or time of the cleaning process is increased when a fan ON failure is detected.

  When the cleaning process is performed in a state where the heating capacity of the heater is reduced, there is a concern that the cleaning capacity of the tableware may be reduced as compared with the case where the cleaning process is performed as usual. As described above, by performing the cleaning process in a state where the number and / or time of the cleaning process is increased, the cleaning capacity of the tableware is reduced even when the heating capacity of the heater is reduced. Can be prevented.

  The dishwasher described above can be configured such that the drying process can be performed as usual when a fan ON failure is detected.

  Even if the fan has an ON failure, the drying process can often be carried out without any problem. According to the dishwasher described above, the user can both clean and dry the dishes even after the failure of the fan is detected and before the failed fan is repaired or replaced.

  The dishwasher described above can be configured such that the drying process cannot be performed when a fan OFF failure is detected.

  If the drying process is carried out as usual with the fan turned off, the members around the heater may be overheated and damaged. According to the dishwasher described above, when the fan OFF failure is detected, the drying process cannot be performed. Therefore, it is possible to prevent the peripheral members of the heater from being overheated and damaged.

  According to the dishwasher disclosed in the present specification, it is possible to improve convenience for the user while ensuring safety.

The longitudinal cross-sectional view which shows typically the structure of the dishwasher 10 of an Example. The flowchart which shows the driving | operation operation | movement of the dishwasher 10 of an Example. The flowchart which shows the detection operation | movement of ON failure and OFF failure of the drying fan 52 in the dishwasher 10 of an Example. The flowchart which shows another driving | operation operation | movement of the dishwasher 10 of an Example.

(Example)
Below, the dishwasher which concerns on an Example is demonstrated, referring drawings. FIG. 1 is a longitudinal sectional view of a dishwasher / dryer 10. The dishwasher / dryer 10 is a drawer-type dishwasher. The dishwasher / dryer 10 includes a main body 12, a washing tank 14, and a door 15.

  The door 15 is provided with an operation panel 16 and an exhaust path 18. The operation panel 16 is provided with various buttons such as a start button, a lamp, and the like. The exhaust path 18 reaches from the inside of the cleaning tank 14 to the outside. The outer end of the cleaning tank 14 of the exhaust path 18 is located on the front surface of the door 15 (left side in FIG. 1), and an exhaust port 18 b is provided on the front surface of the door 15. An opening 18 a is provided at the end of the exhaust path 18 on the cleaning tank 14 side. An exhaust damper 17 is provided in the exhaust path 18.

  The cleaning tank 14 is accommodated in a space formed by the main body 12 and the door 15. The cleaning tank 14 is slidably supported by the main body 12. The cleaning tank 14 is slidable with respect to the main body 12 in the front-rear direction (left-right direction in FIG. 1). The cleaning tank 14 is connected to the door 15. When the door 15 is pulled forward (leftward in FIG. 1), the cleaning tank 14 is pulled out together with the door 15. The cleaning tank 14 has an opening 14a at its upper end. The cleaning tank 14 accommodates a cleaning nozzle 20, a tableware basket 61, and the like. Various tableware 19 is held in the tableware basket 61.

  A lid 56 is disposed above the cleaning tank 14. The lid | cover 56 is connected with the washing tank 14 by the raising / lowering mechanism which is not shown in figure. In a state in which the door 15 is closed (a state in which the cleaning tank 14 is accommodated in the main body 12), the lid 56 is lowered to closely contact the opening 14a of the cleaning tank 14 and cover it. When the cleaning tank 14 is pulled out from the main body 12, the lid 56 rises and opens the opening 14 a of the cleaning tank 14.

  A suction recess 31 is formed on the bottom surface 39 of the cleaning tank 14. A cleaning pump 27 is provided below the bottom surface 39. The cleaning pump 27 rotates the impeller 28 by a built-in electric motor. The cleaning pump 27 can rotate the impeller 28 in the forward direction or in the reverse direction. The space in which the impeller 28 is disposed and the suction recess 31 are communicated with each other by a suction flow path 32. When the cleaning pump 27 rotates the impeller 28 in the forward direction, water is supplied from the suction recess 31 to the cleaning nozzle 20 via the suction flow path 32. The cleaning nozzle 20 sprays the delivered water in the cleaning tank 14.

  An electric heater 30 is mounted above the bottom surface 39 where the cleaning pump 27 is disposed. A thermistor 55 is disposed below the heater 30. The thermistor 55 detects the temperature of the water when the washing tank 14 is filled with water, and detects the temperature of the air inside the washing tank 14 when no water is filled.

  A water level detector 45 is provided at the lower portion outside the front portion of the cleaning tank 14. The water level detector 45 has a water level chamber 46, a float 47, a bar 48, and a switch 49. The water level chamber 46 communicates with the suction recess 31 by a water level path 44. The float 47 is disposed in the water level chamber 46. The bar 48 is fixed to the float 47 and protrudes upward from the water level chamber 46. The switch 49 is disposed above the bar 48. When the cleaning tank 14 is supplied with water, the water is introduced into the water level chamber 46 through the water level path 44. The water level in the water level chamber 46 rises as the water level in the cleaning tank 14 rises. The float 47 rises as the water level in the water level chamber 46 rises. When the float 47 rises and the upper end of the bar 48 comes into contact with the switch 49, a signal is transmitted from the switch 49 to the controller 60 described later.

  A drain hose 34 is connected to the rear wall 33 (the right wall in FIG. 1) of the main body 12. The drain hose 34 communicates with the bottom of the cleaning tank 14 via the drain channel 36. The cleaning pump 27 sends the water in the cleaning tank 14 to the drain hose 34 by rotating the impeller 28 in the reverse direction.

  One end of a water supply hose 40 is connected to the rear wall 33 of the main body 12. The other end of the water supply hose 40 is connected to the water supply pipe 88. One end of the water supply hose 40 is connected to the water supply valve 41 inside the main body 12 via the first water supply flow path 42. The water supply valve 41 is driven by a built-in solenoid to open and close. When the water supply valve 41 is opened, water is supplied into the cleaning tank 14, and when the water supply valve 41 is closed, water supply into the cleaning tank 14 is stopped. The water supply valve 41 and the cleaning tank 14 are communicated with each other by a second water supply channel 43.

  An intake passage 63 is formed between the rear wall 33 of the main body 12 and the rear wall 51 of the cleaning tank 14. The intake path 63 reaches from the outside to the inside of the cleaning tank 14. A drying fan 52 is disposed in the intake path 63. The drying fan 52 rotates the fan 53 with a built-in motor. A constant electric power is supplied to the motor of the drying fan 52. The drying fan 52 is connected to the cleaning tank 14 via the intake path 63. An opening 63 a is formed on the side of the cleaning tank 14 in the intake path 63. The drying fan 52 is provided with a rotation speed sensor 50 that detects the rotation speed of the fan 53.

  A controller 60 is mounted in front of the dishwasher 10. The controller 60 is connected to the operation panel 16, the cleaning pump 27, the heater 30, the water supply valve 41, the switch 49, the rotation speed sensor 50, the drying fan 52, the thermistor 55, and the like. The controller 60 controls the operation of each connected component by a built-in CPU, ROM, RAM, EEPROM, and the like. The controller 60 stores an ON failure flag indicating that the drying fan 52 is ON failure and an OFF failure flag indicating that the drying fan 52 is OFF. The controller 60 has a built-in timer.

  Below, operation | movement of the dishwasher 10 is demonstrated, referring FIG. When the user depresses the start switch of the operation panel 16, the controller 60 performs the processing after step S2.

  In step S2, the controller 60 determines whether or not the drying fan 52 has an ON failure. If an ON failure of the drying fan 52 has already been detected in the previous operation of the dishwasher 10, it is determined from the ON failure flag stored in the controller 60 that the drying fan 52 has an ON failure. . If the ON failure flag does not indicate the ON failure of the drying fan 52, the controller 60 determines whether or not the rotation speed sensor 50 detects the rotation speed while the drying fan 52 is not driven. . When the rotational speed is detected by the rotational speed sensor 50 while the drying fan 52 is not driven, the controller 60 determines that the drying fan 52 has an ON failure.

  If it is determined in step S2 that the drying fan 52 has not been turned ON (NO), the process proceeds to step S4. In step S4, the controller 60 performs a normal cleaning process. In the dishwasher 10 of the present embodiment, in the cleaning process, one cleaning operation and a plurality of rinsing operations are performed. In the cleaning operation, the controller 60 first opens the water supply valve 41 to supply water into the cleaning tank 14. When the switch 49 of the water level detector 45 is turned ON, the controller 60 closes the water supply valve 41 and stops water supply. The controller 60 drives a detergent charging mechanism (not shown) to feed detergent into the water in the cleaning tank 14, and then rotates the cleaning pump 27 in the forward direction while heating the cleaning water by the heater 30. As a result, hot washing water is jetted from the washing nozzle 20 and the tableware 19 in the washing tank 14 is washed. When a predetermined time has elapsed from the start of the cleaning operation, the controller 60 stops heating the cleaning water by the heater 30 and stops the cleaning pump 27. Thereafter, the controller 60 drives the cleaning pump 27 to rotate in the reverse direction, and discharges the cleaning water in the cleaning tank 14.

  In the rinsing operation, the controller 60 first opens the water supply valve 41 to supply water into the cleaning tank 14. When the switch 49 of the water level detector 45 is turned ON, the controller 60 closes the water supply valve 41 and stops water supply. Then, the controller 60 drives the cleaning pump 27 to rotate in the forward direction. As a result, the rinsing water is jetted from the cleaning nozzle 20, and the tableware 19 in the cleaning tank 14 is rinsed. When a predetermined time has elapsed from the start of the rinsing operation, the controller 60 stops the cleaning pump 27. Thereafter, the controller 60 drives the cleaning pump 27 to rotate in the reverse direction to discharge the rinse water in the cleaning tank 14.

  The above rinsing operation is performed a plurality of times, but in the last rinsing operation, the controller 60 heats the rinsing water by the heater 30 when the cleaning pump 27 is driven to inject the rinsing water from the cleaning nozzle 20. Also do. Thereby, the tableware 19 is rinsed with high-temperature rinse water. After step S4, the process proceeds to step S10.

  If it is determined in step S2 that the drying fan 52 has an ON failure (in the case of YES), the process proceeds to step S6. In step S <b> 6, the controller 60 notifies the user via the operation panel 16 that the drying fan 52 has an ON failure. The notification to the user may be performed by, for example, light emission of an LED or display on a liquid crystal screen, or may be performed by issuing a warning sound by a buzzer or a speaker. This notification is continuously performed until the drying fan 52 is repaired or replaced by the service person. After step S6, the process proceeds to step S8.

  In step S8, the controller 60 performs a cleaning process in a state where the heating capability of the heater 30 is reduced. The state in which the heating capacity of the heater 30 is reduced means a state in which the output of the heater 30 is lower than that in the normal cleaning process in step S4. A case where the cleaning water or the rinse water is not heated at all by the heater 30 is also included in a state where the heating capacity of the heater 30 is reduced. Accordingly, it is possible to prevent high-temperature steam from being discharged from the exhaust port 18 b of the exhaust path 18 to the outside of the dishwasher 10.

  In the present embodiment, the controller 60 performs one cleaning operation and a plurality of rinsing operations in the cleaning process of step S8 as well as the cleaning process of step S4. However, in the cleaning process in step S8, the heating capability of the heater 30 is reduced compared to the cleaning process in step S4, and the cleaning water and the rinsing water to be used have a low temperature. The time, the number of rinsing operations and / or the duration may be increased. Thereby, even if it is in the state which reduced the heating capability of the heater 30, the required cleaning capability can be ensured. After step S8, the process proceeds to step S10.

  In step S10, the controller 60 determines whether or not the drying fan 52 has an OFF failure. If an OFF failure of the drying fan 52 has already been detected in the previous operation of the dishwasher 10, it is determined from the OFF failure flag of the controller 60 that the drying fan 52 has an OFF failure. If the OFF failure flag does not indicate the OFF failure of the drying fan 52, the controller 60 determines whether the rotation speed sensor 50 detects the rotation speed while the drying fan 52 is driven. If the rotation speed sensor 50 does not detect the rotation speed while the drying fan 52 is driven, the controller 60 determines that the drying fan 52 has an OFF failure.

  If it is determined in step S10 that the drying fan 52 has not been turned off (NO), the process proceeds to step S12. In step S12, the controller 60 performs a drying process. In the drying process, the controller 60 drives the drying fan 52 while heating the air in the cleaning tank 14 by the heater 30. Thereby, warm air hits the tableware 19 in the washing tank 14, and the tableware 19 dries. When a predetermined time has elapsed from the start of the drying process, the controller 60 stops heating by the heater 30, stops the drying fan 52, and ends the drying process. After step S12, the dishwasher 10 ends its operation.

  If it is determined in step S10 that the drying fan 52 has an OFF failure (in the case of YES), the dishwasher 10 ends its operation without performing the drying process in step S12.

  If, in the drying process, heating by the heater 30 is performed in a state where the drying fan 52 is OFF, the members around the heater 30 may be overheated and damaged. Therefore, in the dishwasher 10 according to the present embodiment, when the drying fan 52 has an OFF failure, the controller 60 performs the cleaning process but does not perform the drying process. By adopting such a configuration, it is possible to prevent the peripheral members of the heater 30 from being damaged by carrying out the drying process when the drying fan 52 has an OFF failure.

(Another embodiment)
Even when the dishwasher 10 of FIG. 1 does not include the rotation speed sensor 50, it is possible to detect ON failure and OFF failure of the drying fan 52. Hereinafter, the detection operation of the ON failure and the OFF failure of the drying fan 52 in the dishwasher 10 that does not include the rotation speed sensor 50 will be described with reference to FIG. When the start switch on the operation panel 16 is pressed by the user, the controller 60 performs the processing after step S22.

  In step S <b> 22, the controller 60 opens the water supply valve 41 and starts water supply into the cleaning tank 14.

  In step S <b> 24, the controller 60 drives the drying fan 52.

  In step S26, the controller 60 stands by until the switch 49 of the water level detector 45 is turned on. When the switch 49 of the water level detector 45 is turned on, the process proceeds to step S28.

  In step S <b> 28, the controller 60 closes the water supply valve 41 and ends the water supply into the cleaning tank 14.

  In step S <b> 30, the controller 60 stops driving the drying fan 52.

  In step S32, the controller 60 determines whether or not the switch 49 of the water level detector 45 is turned off.

  When the controller 60 performs the processing from step S22 to step S30, if the drying fan 52 has not failed, the pressure of the air in the cleaning tank 14 is supplied by supplying water into the cleaning tank 14 and driving the drying fan 52. As the water level in the cleaning tank 14 falls, the water level in the water level chamber 46 of the water level detector 45 rises. In this state, after the switch 49 of the water level detector 45 is turned ON, when the controller 60 stops driving the drying fan 52, the pressure of the air in the cleaning tank 14 decreases and the water level in the cleaning tank 14 increases. At the same time, the water level in the water level chamber 46 of the water level detector 45 falls. For this reason, when the drying fan 52 has not failed, the switch 49 of the water level detector 45 is turned off after step S30.

  When the controller 60 performs the processing from step S22 to step S30, if the drying fan 52 is in an ON failure, the water in the cleaning tank 14 is supplied with water, and the air in the cleaning tank 14 is driven by the driving of the drying fan 52. As the pressure increases, the water level in the cleaning tank 14 decreases and the water level in the water level chamber 46 of the water level detector 45 increases. In this state, even if the controller 60 stops driving the drying fan 52 after the switch 49 of the water level detector 45 is turned ON, the drying fan 52 is in an ON failure state. The pressure is maintained as it is, and the water level in the cleaning tank 14 and the water level in the water level chamber 46 of the water level detector 45 do not change. For this reason, when the drying fan 52 is in an ON failure, the switch 49 of the water level detector 45 is kept ON after step S30.

  When the controller 60 performs the processing from step S22 to step S30, if the drying fan 52 has an OFF failure, the drying fan 52 is not driven during the water supply to the cleaning tank 14, so The water level and the water level in the water level chamber 46 of the water level detector 45 are the same. In this state, even if the controller 60 stops driving the drying fan 52 after the switch 49 of the water level detector 45 is turned on, the water level in the cleaning tank 14 and the water level in the water level chamber 46 of the water level detector 45 are not changed. It does not change. For this reason, when the drying fan 52 has an OFF failure, the switch 49 of the water level detector 45 is kept ON after step S30.

  From the above, when the switch 49 of the water level detector 45 is OFF in Step S32 (in the case of YES), the controller 60 determines that the drying fan 52 has neither ON failure nor OFF failure. In this case, the controller 60 ends the process of FIG. 3 and sequentially performs the cleaning process shown in step S4 of FIG. 2 and the drying process shown in step S12.

  If the switch 49 of the water level detector 45 is ON in step S32 in FIG. 3 (NO), the controller 60 determines that the drying fan 52 has either an ON failure or an OFF failure. In this case, the process proceeds to step S34.

  In step S34, the controller 60 determines whether or not the time (water supply time) required from the start of water supply in step S22 to the stop of water supply in step S28 exceeds a predetermined threshold value. If the drying fan 52 has an ON failure, the air pressure in the cleaning tank 14 increases during the water supply from step S22 to step S28, the water level in the cleaning tank 14 decreases, and the water level detector 45 The water level in the water level chamber 46 is rising. For this reason, the time from when the water supply is started until the switch 49 of the water level detector 45 is turned on is short. On the other hand, if the drying fan 52 has an OFF failure, the air pressure in the cleaning tank 14 does not change during the water supply from step S22 to step S28, and the water level and water level in the cleaning tank 14 do not change. The water level in the chamber 46 is the same. For this reason, the time from when the water supply is started until the switch 49 of the water level detector 45 is turned on becomes long.

  From the above, if the water supply time exceeds the threshold value in step S34 (in the case of YES), the process proceeds to step S36, and the controller 60 determines that the drying fan 52 has an OFF failure. After step S36, the controller 60 terminates the process of FIG. 3, performs the cleaning process shown in step S4 of FIG. 2, and then notifies the user shown in step S14.

  If the water supply time does not exceed the threshold value in step S34 (in the case of NO), the process proceeds to step S38, and the controller 60 determines that the drying fan 52 has an ON failure. After step S38, the controller 60 ends the process of FIG. 3, and notifies the user shown in step S6 of FIG. 2, and the cleaning process in a state where the heating capacity of the heater 30 is reduced shown in step S8, The drying process shown in step S12 is performed in order.

(Still another embodiment)
In the example illustrated in FIG. 3, the controller 60 determines whether the drying fan 52 has an ON failure or an OFF failure according to the length of time for supplying water into the cleaning tank 14. Subsequent operation can be performed without distinguishing between failures. Hereinafter, the operation of the dishwasher 10 that does not include the rotation speed sensor 50 will be described with reference to FIG. When the start switch on the operation panel 16 is pressed by the user, the controller 60 performs the processing after step S42.

  In step S <b> 42, the controller 60 opens the water supply valve 41 and starts water supply into the cleaning tank 14.

  In step S44, the controller 60 drives the drying fan 52.

  In step S46, the controller 60 stands by until the switch 49 of the water level detector 45 is turned on. When the switch 49 of the water level detector 45 is turned on, the process proceeds to step S48.

  In step S <b> 48, the controller 60 closes the water supply valve 41 and ends the water supply into the cleaning tank 14.

  In step S50, the controller 60 stops driving the drying fan 52.

  In step S52, the controller 60 determines whether or not the switch 49 of the water level detector 45 is turned off. When the switch 49 of the water level detector 45 is OFF (in the case of YES), the controller 60 determines that the drying fan 52 has neither an ON failure nor an OFF failure. In this case, the process proceeds to step S54, and the controller 60 performs a cleaning process similar to that shown in step S4 of FIG. Thereafter, the process proceeds to step S56, and the controller 60 performs a drying process similar to that shown in step S12 of FIG.

  If the switch 49 of the water level detector 45 is ON (in the case of NO) in step S52, the controller 60 determines that the drying fan 52 has either an ON failure or an OFF failure, and the process is step. Proceed to S58. In this case, the controller 60 performs the subsequent operation so that no problem occurs even if the drying fan 52 has an ON failure or an OFF failure. That is, the cleaning process can be performed in a state in which the heating capacity of the heater 30 is reduced so that no problem occurs even if the drying fan 52 is in an ON failure. With respect to the drying process, it is impossible to carry out the operation so that no problem occurs even if the drying fan 52 has a failure.

  In step S58, the controller 60 notifies the user via the operation panel 16 that the drying fan 52 has failed. Thereafter, the process proceeds to step S60, and the controller 60 performs the cleaning process in a state in which the heating capability of the heater 30 is reduced, as in step S8 of FIG. Thereafter, the controller 60 ends the process without performing the drying process.

  As mentioned above, although the Example of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

DESCRIPTION OF SYMBOLS 10 Dishwasher 12 Main body 14 Washing tank 14a Opening 15 Door 16 Operation panel 17 Exhaust damper 18 Exhaust path 18a Opening 18b Exhaust outlet 19 Tableware 20 Washing nozzle 27 Washing pump 28 Impeller 30 Heater 31 Suction recess 32 Suction channel 33 Back wall 34 Drainage hose 36 Drainage channel 39 Bottom surface 40 Water supply hose 41 Water supply valve 42 First water supply channel 43 Second water supply channel 44 Water level channel 45 Water level detector 46 Water level chamber 47 Float 48 Bar 49 Switch 50 Speed sensor 51 Rear wall 52 Drying fan 53 Fan 55 Thermistor 56 Lid 60 Controller 63 Intake passage 63a Opening 88 Water supply pipe

Claims (4)

A dishwasher capable of performing a washing process and a drying process,
A washing tank;
A heater for heating water or air inside the cleaning tank;
An intake path communicating from the outside of the washing tank to the inside of the washing tank;
An exhaust path communicating from the inside of the washing tank to the outside of the dishwasher;
It has a fan provided in the intake path,
In the cleaning process, water is heated by the heater to wash the dishes,
In the drying process, air heated by the heater is blown by a fan to dry the dishes,
A dishwasher that enables a washing process to be carried out with a reduced heating capacity of a heater when a fan failure is detected.   2. The dishwasher / dryer according to claim 1, wherein, when a fan ON failure is detected, the washing step can be performed in a state where the number and / or time of the washing step is increased.   The dishwasher according to claim 1, wherein when a fan ON failure is detected, the drying process can be performed as usual.   The dishwasher according to any one of claims 1 to 3, wherein when a fan OFF failure is detected, the drying process cannot be performed.

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