JP2016077461A - Dish washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dish washing and drying machine capable of efficiently removing stains in a washing tank in washing tank washing operation.SOLUTION: The invention discloses a dish washing and drying machine comprising a washing tank for washing dishes, and a fan for introducing outside air into the washing tank, and capable of performing washing tank washing operation for washing inside of the washing tank. In the dish washing and drying machine, the washing tank washing operation comprises an intermittent air blowing step for, intermittently operating the fan for blowing air and washing inside of the washing tank, in a state that water is stored in the washing tank.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a dishwasher.

  Patent Documents 1 and 2 disclose a dishwasher. This dishwasher can implement a dish washing course for washing dishes and a cleaning course for washing the inside of the washing tank. In the dishwashing course, after performing the pre-washing process, the main washing process is performed using a detergent, and then the rinsing process is performed. In the cleaning course, a washing process using a detergent is performed without pre-washing, and then a rinsing process is performed. When washing the inside of the washing tub using a dishwashing course designed with the focus on washing dishes, an unnecessary prewashing process will be carried out, and electricity and water bills will be wasted. The By cleaning the inside of the washing tank with a cleaning course designed with a focus on washing in the washing tank, it is possible to save on electricity and water bills.

JP 2000-316783 A JP 2000-316784 A

  In the dishwasher of Patent Documents 1 and 2, in the washing process of the cleaning course, a detergent for washing the washing tank such as citric acid is put in a state where water is stored in the washing tank, and the washing pump is operated. Wash. In order to improve the removal effect of dirt accumulated on the inner wall near the water level in the washing tank during water supply, the washing pump is temporarily stopped during the washing process to raise the water level in the washing tank to the extent that the dirt is immersed. . However, there are cases where the dirt cannot be sufficiently removed by merely raising the water level in the washing tank to such an extent that the washing pump is temporarily stopped to soak the dirt.

  The present specification discloses a dishwasher having a washing tank for washing dishes and a fan for introducing air outside the machine into the washing tank, and capable of performing a washing tank washing operation for washing the inside of the washing tank. In this dishwasher, the washing tub washing operation includes an intermittent blowing process in which the fan is intermittently operated and blown in a state where water is stored in the washing tub to wash the inside of the washing tub.

  According to the dishwasher described above, the water level stored in the washing tank fluctuates up and down because the fan is intermittently operated in the intermittent air blowing process while water is stored in the washing tank. As a result, dirt in the cleaning tank can be more effectively removed.

  The dishwasher described above includes an exhaust port that discharges air in the cleaning tank, and an exhaust path that communicates with the exhaust port and the cleaning tank. The exhaust path is stored in the cleaning tank in the intermittent air blowing process. It can be configured to be sealed with water. If the fan is intermittently operated in a state where the exhaust path is sealed with water, the water level fluctuates more sharply than the intermittent operation of the fan. As a result, the fluctuation of the water level becomes faster and the dirt in the cleaning tank can be removed more effectively.

  The dishwasher described above includes a heater that can heat the water in the washing tub. In the intermittent air blowing process, the fan is intermittently stored in the washing tub with water heated to a predetermined temperature by the heater. It can operate | move to and can comprise so that the inside of a washing tank may be washed. Since the water level is changed in a state where the heated water is stored in the cleaning tank, dirt in the cleaning tank can be more effectively removed.

  The dishwasher described above may be capable of selecting a normal operation course for performing dishwashing operation for washing dishes and a cleaning course for performing washing tank washing operation.

  According to this specification, the dishwasher which can remove the dirt in a washing tank more effectively in washing tank washing operation can be provided.

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 washing | cleaning process in the dishwasher 10 of an Example. The flowchart which shows the water rinse process in the dishwasher / dryer 10 of an Example. The flowchart which shows the heating rinse process in the dishwasher / dryer 10 of an Example. The flowchart which shows the drying process in the dishwasher 10 of an Example. The figure which expands and shows the vicinity of the sealing member 70 of the dishwasher 10 of FIG. The figure which expands and shows the vicinity of the sealing member 70 of the dishwasher 10 of FIG.

(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. The exhaust path 18 communicates with the opening 18a and the exhaust port 18b. 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 main body 12 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 by a link mechanism (not shown) so as to be in close contact with the opening 14a of the cleaning tank 14. As shown in FIGS. 1 and 7, the lower surface of the lid 56 is provided with a hanging portion 56 b that extends downward inside the cleaning tank 14. The peripheral edge of the opening 14a of the cleaning tank 14 includes a horizontal portion 14b extending in the lateral direction from the inside to the outside of the cleaning tank 14, and a vertical portion 14c extending upward from the horizontal portion 14b. The hanging part 56b, the horizontal part 14b, and the vertical part 14c circulate along the periphery of the lid 56 and the opening 14a. A seal member 70 that circulates along the periphery of the lid 56 and the opening 14 a is attached to the outside of the hanging portion 56 b on the lower surface of the lid 56. When the lid 56 is lowered, the seal member 70 comes into contact with the upper surface of the horizontal portion 14b at the contact point 72, whereby the lid 56 is in close contact with the opening 14a. When the cleaning tank 14 is pulled out from the main body 12, the lid 56 is raised by the link mechanism to open 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. When the cleaning pump 27 is rotated in the reverse direction, the water can be drained from the cleaning tank 14. 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 and communicates with the bottom of the cleaning tank 14 by a water level path 38. 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 58 of the water level chamber 46 rises as the water level of the cleaning tank 14 rises. The float 47 rises as the water level 58 of 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. When the switch 49 of the water level detector 45 is turned ON, the water level 58 is located above the opening 18a, and the exhaust path 18 is sealed with water.

  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 has a built-in timer.

  The dishwasher / dryer 10 can be switched between a normal operation course and a cleaning course according to the user's selection. In the normal operation course, the dishwasher 10 can perform the steps of washing the dishes, rinsing the washed dishes, and drying the dishes. In the cleaning course, a cleaning tank cleaning operation can be performed. Below, the operation | movement of the washing tank washing | cleaning driving | operation of the dishwasher 10 is demonstrated, referring FIGS. When the cleaning course is selected by the user and the start switch on the operation panel 16 is pressed, the controller 60 performs the processing after step S10. In the cleaning tank cleaning operation, the cleaning process (step S10), the water rinsing process (step S30), the heating rinsing process (S50), and the drying process (S70) are performed in this order.

  FIG. 3 shows a flowchart of the cleaning process performed in step S10. When the cleaning process is started, the controller 60 drains the water in the cleaning tank 14 (step S12), and then supplies water to the cleaning tank 14 (step S14). In step S12, the controller 60 rotates the cleaning pump 27 in the reverse direction to discharge the water in the cleaning tank 14, and then stops the cleaning pump 27. In step S <b> 14, the controller 60 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. At this time, the water level 58 is located above the opening 18a, and the exhaust path 18 is sealed with water. Before the start switch of the operation panel 16 is pressed, the detergent for cleaning the cleaning tank 14 is put in the detergent container (not shown) in the cleaning tank 14, and the cleaning process of the cleaning tank cleaning operation is performed. Is performed using wash water containing a cleaning detergent.

  Next, the controller 60 turns on the cleaning pump 27 and the heater 30 (step S16). The controller 60 rotates the cleaning pump 27 in the forward direction while heating the cleaning water by the heater 30. As a result, hot cleaning water is jetted from the cleaning nozzle 20 to clean the inside of the cleaning tank 14.

  Next, in step S18, the controller 60 detects the water temperature Tw in the cleaning tank 14 with the thermistor 55, and determines whether the water temperature Tw is equal to or higher than T1. Although not limited, the temperature T1 can be set to 70 degreeC, for example. When it is determined in step S18 that the water temperature Tw is lower than T1 (in the case of NO), the process returns to step S18, and re-determination is repeated until the water temperature Tw becomes equal to or higher than T1. When it is determined in step S18 that the water temperature Tw is equal to or higher than T1 (in the case of YES), the controller 60 turns off the cleaning pump 27 and the heater 30 (step S20). Then, it transfers to an intermittent ventilation process (step S22).

  In the intermittent air blowing process of step S <b> 22, the controller 60 operates the drying fan 52 intermittently and blows air into the cleaning tank 14. Although the intermittent operation is not limited, for example, the ON time of the drying fan 52 can be 2 seconds and the OFF time can be 8 seconds. Next, in step S24, the controller 60 determines whether or not a predetermined set time has elapsed since the start of the cleaning process. This determination can be performed by a timer built in the controller 60. When it is determined in step S24 that the set time has not elapsed (in the case of NO), the controller 60 detects the water temperature Tw in the cleaning tank 14 with the thermistor 55 and determines whether the water temperature Tw is equal to or lower than T2. Judgment is made (step S26). The temperature T2 is set to a temperature lower than the temperature T1 and is not limited, but the temperature T2 can be set to 67 ° C., for example. When it is determined in step S26 that the water temperature Tw is equal to or lower than T2 (in the case of YES), the controller 60 turns off the drying fan 52 (step S28) and returns to step S16. If it is determined in step S26 that the water temperature Tw exceeds T2 (in the case of NO), the process returns to step S24. By performing Step S24 and Step S26, the intermittent air blowing process can be repeatedly executed until the set time elapses while the water heated to a high temperature is stored in the cleaning tank 14. When it is determined in step S24 that the set time has elapsed (in the case of YES), the controller 60 turns off the drying fan 52 (step S25), and drives the cleaning pump 27 to rotate in the reverse direction. The water in the cleaning tank 14 is discharged (step S27). Thus, the cleaning process (step S10) is finished, and the process proceeds to the water rinsing process (step S30).

  FIG. 4 shows a flowchart of the water rinsing process performed in step S30. When the water rinsing process is started, the controller 60 supplies water into the cleaning tank 14 (step S32). In step S <b> 32, the controller 60 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. At this time, the water level 58 is located above the opening 18a, and the exhaust path 18 is sealed with water. Next, the controller 60 turns on the cleaning pump 27 (step S34). The controller 60 rotationally drives the cleaning pump 27 in the forward direction. As a result, water is jetted from the cleaning nozzle 20, and the inside of the cleaning tank 14 is rinsed with water.

  Next, in step S36, the controller 60 determines whether or not a predetermined set time has elapsed since the start of the water rinsing process. If it is determined in step S36 that the set time has not elapsed (in the case of NO), the process returns to step S36, and re-determination is repeated until the set time has elapsed. If it is determined in step S36 that the set time has elapsed (in the case of YES), the controller 60 turns off the cleaning pump 27 (step S38), and then proceeds to the intermittent air blowing process (step S40). To do.

  In the intermittent air blowing process of step S <b> 40, the controller 60 operates the drying fan 52 intermittently and blows air into the cleaning tank 14. Although the intermittent operation is not limited, for example, the ON time of the drying fan 52 can be 5 seconds and the OFF time can be 5 seconds. Next, in step S42, the controller 60 determines whether or not a predetermined set time has elapsed since the start of the water rinsing process. If it is determined in step S42 that the set time has not elapsed (in the case of NO), the process returns to step S42, and re-determination is repeated until the set time has elapsed. If it is determined in step S42 that the set time has elapsed (in the case of YES), the controller 60 turns off the drying fan 52 (step S44), and drives the cleaning pump 27 to rotate in the reverse direction. After discharging the water in the cleaning tank 14 (step S46), it is determined whether or not the water rinsing process has been performed a predetermined number of times (step S48). If it is determined in step S48 that the water rinsing process has not been executed a predetermined number of times (in the case of NO), the process returns to step S32, and steps S32 to S48 are repeated until the set time has elapsed. If it is determined in step S48 that the water rinsing process has been executed a predetermined number of times (in the case of YES), the water rinsing process (step S30) is terminated, and the process proceeds to the heating rinsing process (step S50).

  FIG. 5 shows a flowchart of the heating rinse process performed in step S50. When the heating rinse process is started, the controller 60 supplies water into the cleaning tank 14 (step S52). In step S <b> 52, the controller 60 opens the water supply valve 41 and supplies 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. At this time, the water level 58 is located above the opening 18a, and the exhaust path 18 is sealed with water.

  Next, the controller 60 turns on the cleaning pump 27 and the heater 30 (step S56). The controller 60 drives the cleaning pump 27 to rotate in the forward direction while heating water with the heater 30. Accordingly, high-temperature water is jetted from the cleaning nozzle 20 and the inside of the cleaning tank 14 is rinsed.

  Next, in step S58, the controller 60 detects the water temperature Tw in the cleaning tank 14 with the thermistor 55, and determines whether the water temperature Tw is equal to or higher than T1. Although not limited, the temperature T1 can be set to 70 degreeC, for example. When it is determined in step S58 that the water temperature Tw is lower than T1 (in the case of NO), the process returns to step S58, and re-determination is repeated until the water temperature Tw becomes equal to or higher than T1. When it is determined in step S58 that the water temperature Tw is equal to or higher than T1 (in the case of YES), the controller 60 turns off the cleaning pump 27 and the heater 30 (step S60). Then, it transfers to an intermittent ventilation process (step S62).

  In the intermittent air blowing process of step S <b> 62, the controller 60 operates the drying fan 52 intermittently and blows air into the cleaning tank 14. Although intermittent operation is not limited, for example, the ON time of the drying fan can be set to 2 seconds, and the OFF time can be set to 8 seconds. Next, in step S64, the controller 60 determines whether or not a predetermined set time has elapsed since the start of the heating rinse process. When it is determined in step S64 that the set time has not elapsed (in the case of NO), the controller 60 detects the water temperature Tw in the cleaning tank 14 with the thermistor 55 and determines whether the water temperature Tw is equal to or lower than T2. Judgment is made (step S66). The temperature T2 is set to a temperature lower than the temperature T1 and is not limited, but the temperature T2 can be set to 67 ° C., for example. When it is determined in step S66 that the water temperature Tw exceeds T2 (in the case of NO), the process returns to step S64. By performing Step S64 and Step S66, the intermittent air blowing process can be repeatedly executed until the set time elapses while the water heated to a high temperature is stored in the cleaning tank 14. When it is determined in step S66 that the water temperature Tw is equal to or lower than T2 (in the case of YES), the controller 60 turns off the drying fan 52 (step S68) and returns to step S56. When it is determined in step S64 that the set time has elapsed (in the case of YES), the controller 60 turns off the drying fan 52 (step S65), and drives the cleaning pump 27 to rotate in the reverse direction. Water in the cleaning tank 14 is discharged (step S67). Thereby, the heating rinsing process (step S50) is completed, and the process proceeds to the drying process (step S70).

  FIG. 6 shows a flowchart of the drying process performed in step S70. When the drying process is started, the controller 60 turns on the drying fan 52 (step S72), and then determines whether or not a predetermined set time has elapsed from the start of the drying process (step S74). If it is determined in step S74 that the set time has not elapsed (NO), the process proceeds to step S82.

  In step S82, the controller 60 detects the temperature t in the cleaning tank 14 with the thermistor 55, and determines whether the temperature t is equal to or higher than t1 ° C. At step S82, since the water is not stored in the cleaning tank 14, the thermistor 55 detects the temperature of the air in the cleaning tank 14. When it is determined in step S82 that the temperature t is not equal to or higher than t1 ° C. (in the case of NO), the process proceeds to step S86, and the controller 60 determines whether the temperature t is equal to or lower than t2 ° C. The set temperature t2 is set to a temperature lower than the set temperature t1, and is not limited. For example, t1 = 55 ° C. and t2 = 45 ° C. can be set. If it is determined in step S86 that the temperature t is equal to or lower than t2 ° C. (in the case of YES), the controller 60 turns on the heater 30 (step S88). Thereafter, the process returns to step S74, and the re-determination is repeated until the set time elapses. When it is determined in step S86 that the temperature t is not equal to or lower than t2 ° C. (in the case of NO), the process returns to step S74, and re-determination is repeated until the set time has elapsed. When it is determined in step S82 that the temperature t is equal to or higher than t1 ° C. (in the case of YES), the controller 60 turns off the heater 30 (step S84). Thereafter, the process returns to step S74, and the re-determination is repeated until the set time elapses. If it is determined in step S74 that the set time has elapsed (in the case of YES), the controller 60 turns off the drying fan 52 and the heater 30 (step S75), and ends the drying process (step S70). . Thereby, all the steps of the cleaning tank cleaning operation are completed.

  As described above, the dishwasher / dryer 10 disclosed in the present specification includes a washing step (step S10), a water rinsing step (step S30), and a heating rinsing step (step S50) performed in the washing tank washing operation, respectively. The intermittent ventilation process (step S22, step S40, step S62) is included. In each intermittent ventilation process, the drying fan 52 is intermittently operated in a state where water is stored up to a predetermined water level in the cleaning tank 14. For this reason, the water level stored in the cleaning tank 14 fluctuates up and down, and the dirt in the cleaning tank 14 can be more effectively removed. In addition, dirt may adhere to the cleaning tank 14 around the contact point 71 shown in FIG. In the intermittent air blowing process, the pressure in the cleaning tank 14 is increased when the drying fan 52 is operated, and the seal member 70 is deformed and moved in the outer direction of the cleaning tank 14 as indicated by an arrow in FIG. As a result, the contact between the seal member 70 and the horizontal portion 14c of the cleaning tank 14 is transferred to the contact 72, and the contact 71 in FIG. 7 is exposed. Since the periphery of the contact 71 is exposed, the cleaning water reaches the dirt adhering to the periphery of the contact 71 and can be washed away effectively, and the inside of the cleaning tank 14 can be cleaned to every corner.

  The dishwasher / dryer 10 also includes an exhaust port 18 b and an exhaust path 18 that communicates with the exhaust port 18 b and the opening 18 a of the cleaning tank 14. The exhaust path 18 is sealed with water stored in the cleaning tank 14 in the intermittent air blowing process (step S22, step S40, step S62). Since the intermittent air blowing process is performed in a state where the exhaust path 18 is sealed with water and the drying fan 52 is intermittently operated, the water level 58 varies more sharply than the intermittent operation of the drying fan 52. As a result, the fluctuation of the water level 58 becomes faster, and the dirt in the cleaning tank 14 can be more effectively removed. Moreover, in the state sealed with water, since the rotational load of the drying fan 52 becomes low, the power consumption of the drying fan 52 can be suppressed.

  In addition, the dishwasher 10 includes a heater 30 that can heat the water in the washing tub 14. In the intermittent blowing process (step S22, step S62) executed in the cleaning process (step S10) and the heating rinse process (step S50), the water heated to a predetermined temperature by the heater 30 is stored in the cleaning tank. Then, the drying fan 52 is operated intermittently to clean the inside of the cleaning tank 14. For this reason, the stain | pollution | contamination in the washing tank 14 can be removed more effectively.

  In the cleaning tank cleaning operation of the above embodiment, the cleaning process, the water rinsing process, the heating rinsing process, and the drying process are performed in this order, but the present invention is not limited to this. The washing tank washing | cleaning operation should just perform a washing | cleaning process and a rinse process at least once each. Further, the drying process may not be included in the cleaning tank cleaning operation. Moreover, in said washing tank washing | cleaning operation, although the washing | cleaning process, the water rinse process, and the heating rinse process each included the intermittent ventilation process, it is not limited to this. If at least one of the cleaning process and the rinsing process includes the intermittent air blowing process according to the present specification, the effects of the invention according to the present specification can be obtained. In the above-described embodiment, as an example in which the fan is intermittently operated in the intermittent air blowing process, an example in which the fan is switched ON / OFF every predetermined time has been described, but without turning the fan OFF, The number of revolutions may be switched every predetermined time. That is, the level of water stored in the cleaning tank may be changed by controlling the intensity of the air without stopping the air from the fan. In the above embodiment, the dishwasher / dryer in which the opening 18a of the exhaust path is sealed with water is described as an example. However, the present invention is not limited to this. The position of the opening of the exhaust path is provided above the water level when water is stored in the washing tank, and the technology disclosed in this specification can be applied to a dishwasher that is not water-sealed. it can.

  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 Drain hose 36 Drain flow path 38 Water level path 39 Bottom surface 40 Water supply hose 41 Water supply valve 42 First water supply path 43 Second water supply path 44 Water level path 45 Water level detector 46 Water level chamber 47 Float 48 Bar 49 Switch 50 Speed sensor 51 Back wall 52 Drying fan 53 Fan 55 Thermistor 56 Lid 60 Controller 63 Air intake path 63a Opening 70 Seal member 88 Water supply pipe

Claims (4)

A dishwasher having a washing tank for washing dishes and a fan for introducing air outside the machine into the washing tank, and capable of performing a washing tank washing operation for washing the inside of the washing tank,
The washing tank washing operation is a dishwasher having an intermittent air blowing process in which water is stored in the washing tank and the fan is intermittently operated to blow and wash the washing tank. The dishwasher has an exhaust port for discharging the air in the washing tank, and an exhaust path communicating with the exhaust port and the washing tank.
The dishwasher according to claim 1, wherein the exhaust path is sealed with water stored in the washing tank in the intermittent air blowing process. The dishwasher has a heater that can heat the water in the washing tank,
The dishwasher according to claim 1 or 2, wherein, in the intermittent air blowing step, the inside of the washing tank is washed by operating the fan intermittently in a state where water heated to a predetermined temperature by the heater is stored in the washing tank.   The dishwasher as described in any one of Claims 1-3 which can select the normal operation course which performs the dishwashing operation | movement which wash | cleans tableware, and the cleaning course which performs a washing tank washing | cleaning operation.

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