JP2542944B2 - Dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is directed to the tableware by injecting cleaning water supplied from a pump from the cleaning nozzle body provided in the lower part of the cleaning tank onto the tableware. The present invention relates to a dishwasher for washing.

(B) Conventional technology In this type of dishwasher, the central portion of a long washing nozzle is rotatably stopped, and a propulsion nozzle is provided at one end of the nozzle body. Then, when the cleaning water is sent to the nozzle body, the cleaning water moves toward the outer end, is sprayed from each nozzle on the way, and is sprayed laterally in one direction from the propulsion nozzle. This one-way jet causes the cleaning nozzle body to rotate in the other direction.

Such a propulsion nozzle is provided in both directions, a ball valve is rolled when cleaning water is supplied to close one nozzle, and the cleaning nozzle body is alternately rotated in both directions, for example.
It is disclosed in Japanese Patent Publication No. 49-44751.

(C) Problem to be Solved by the Invention In the above-mentioned conventional example, the ball valve is formed by depositing debris such as food residue attached to the dishes contained in the cleaning water supplied to the cleaning nozzle body on the cleaning nozzle body. However, when the ball valve does not close the propulsion nozzles and the propulsion nozzles do not close, the cleaning nozzle body may not rotate even if the cleaning water is sprayed from both propulsion nozzles.

 The present invention solves such a problem.

(D) Means for Solving the Problems The present invention is directed to a long cleaning nozzle body horizontally rotatably arranged in a lower portion of a cleaning tank, a pump for supplying cleaning water to the cleaning nozzle body, Driving means for intermittently driving the pump, first nozzles provided on the upper surface of the cleaning nozzle body for spraying the cleaning water onto dishes, and both sides of one end of the cleaning nozzle body for cleaning A pair of propulsion nozzles for injecting water to give a propulsive force for rotation to the cleaning nozzle body, and a predetermined position in the vicinity of one of the propulsion nozzles in the cleaning nozzle body during operation of the pump, A ball valve that is pressed by the water flow to close one opening of the propulsion nozzle, and a moving means that moves the ball valve to a predetermined position near the other propulsion nozzle by its own weight in the cleaning nozzle body when the pump is stopped. When In a dishwasher equipped with, by spraying the wash water,
A second nozzle that provides a propulsive force that rotates the cleaning nozzle body in a direction opposite to the rotational direction of the one propulsive nozzle and that provides a propulsive force that is weaker than the propulsive force of the propulsive nozzle;
The cleaning nozzle body is provided.

(E) Operation As the drive pump is driven and stopped, the ball valve moves back and forth between both propulsion nozzles to close the opening of the alternate nozzle, and the cleaning nozzle body rotates in reverse. In this way, the wash water is sprayed from the first nozzle and hung on the tableware.

At this time, the rotation by one of the propulsion nozzles is hindered by the propulsion force of the second nozzle, but the rotation of the second nozzle is stopped because the propulsion force of the second nozzle is weaker than that of the propulsion nozzle. There is no.

Here, when debris such as food residue contained in the washing water accumulates in the washing nozzle body, the debris stops the movement of the ball valve, the ball valve does not move only by the force of the water flow from the pump, and the propulsion nozzle It happens that you cannot close the opening. As a result, cleaning water is sprayed from both propulsion nozzles, and the cleaning nozzle body can no longer rotate with the propulsive force of these propulsion nozzles.

At this time, since the propulsive force is applied to the cleaning nozzle body also by the ejection from the second nozzle, the cleaning nozzle body starts to rotate due to the propulsive force from the second nozzle. At that time, in addition to the force of the water flow, inertial force acts on the ball valve,
The ball valve starts to move because a strong force is applied. When the ball valve moves, the water flow of the washing water ejected from the nearby propulsion nozzle carries the ball valve to the propulsion nozzle, and when the propulsion nozzle is closed, the cleaning nozzle body starts to rotate.

(F) Example In the following, description will be given based on an example. In FIGS. 1 and 2, reference numeral 1 is a tabletop type dishwasher, which is provided with a downward opening door 2 in a front opening, and a washing tank 3 inside. Is provided.
A tableware basket 4 can be put in and taken out from the front opening in the middle of the washing tank 3. Reference numeral 5 is a mounting rail. An arm nozzle 6 and a sheath heater 7 for spraying washing water against the tableware basket 4 while rotating are arranged in the lower portion of the washing tank 3, and a recess 9 provided with a removable filter 8 is provided at the bottom. Has been formed. The operation of the arm nozzle 6 will be described later. A door switch 10 for detecting the opening / closing of the door 2 is provided in the front portion of the upper surface of the cleaning tank 3, and the thermistor 11 is provided near the water supply port of the cleaning tank 3 though not shown. It is provided at the bottom of the tank near the heater 7.

Reference numeral 12 denotes a washing and draining pump (hereinafter referred to as a pump). When the pump 12 is rotated forward, washing water is supplied to the arm nozzle 6 and the washing water is jetted from the arm nozzle 6 to wash dishes. Then rinse and circulate wash water. Further, during reverse rotation, the cleaning water in the cleaning tank 3 is discharged to the outside of the machine through the drain pipe 13. By driving and stopping the pump 12, the opening direction of the propulsion hole of the arm nozzle 6 changes, and the rotation of the nozzle 6 is reversed. 14
Is a circulation duct which communicates with the cleaning tank 3 and forms a closed loop with the cleaning tank 3, and 15 partitions the air inside the tank from the outside air in the circulation duct 14, and heat exchanges at this portion to dehumidify the air inside the tank. A partition plate for 16 is provided by cutting out a part of the partition plate 15 so that one surface comes into contact with the outside air and the other surface comes into contact with the air in the tank, and both surfaces are provided with blades on both sides. The fan is a fan that is forced to circulate the air inside the tank and the outside air in the circulation duct 14 by rotating the motor 17. Reference numeral 18 denotes a water level detection case having a communication hole that communicates with the inside of the cleaning tank 3, and detects the water level and abnormal water level in the cleaning tank 3 by vertically moving the float in the detection case 18. In addition, the water level detection case 18 has a water supply valve 19
Is connected to the water supply pipe 20, and when supplying water, the water is passed through the inside of the water level detection case 18 to allow water to be supplied into the cleaning tank 3 while removing impurities such as dust in the case 18. I try to keep it clean. The door 2 of the main body 1 is provided with an operation part 21 of the dishwasher, and a control box 22 connected to the operation part 21 is provided in the lower front part. The operating portion 21 is, as shown in FIG.
Prewash, wash, rinse, dry process and prewash only, ganko, standard, speedy, dry only course and drying time character display, and LED23, 24, 25 corresponding to each character display
A dry time change key 26, a course change key 27, and a start key 28 that also serves as a pause key are provided.

Each key 26, 27, 28 is used to change the time, course, or stop / start to sequential operation for each operation.

A control circuit centered on a microcomputer 29 (hereinafter referred to as a microcomputer) including a ROM, a RAM, a CPU, an I / O and the like is incorporated in the control box 22.
It is shown in the figure. That is, the microcomputer 29 inputs signals from the wash water level switch 30, the abnormal water level switch 31, the thermistor 11, the door switch 10, and the keys 26, 27, 28, and the sheath heater 7, water supply valve 19, pump 12, motor 17, LED23, 24, 2
Outputs an operation signal to 5. Also, the microcomputer 29 is
It is possible to output to the AC solenoid 33 and the buzzer 34 that open the power switch being closed. Further, the microcomputer 29 inputs a detection signal from the overcurrent detection means 35 including a current transformer for detecting the lock of the pump 12.

Next, the control operation by the microcomputer 29 will be described with reference to FIGS. 4 and 5. First, the RAM 36 is cleared in the initial setting after the power switch 32 is turned on, and the standard course and time are called from the ROM 37 and set. . And the thermistor
After checking the disconnection of 11, the operations of the course change key 27 and the dry time change key 26 which is accepted only in the prewash except the course are examined.

The temperature detected by the thermistor 11 is being investigated regardless of the course change or the operation of the start key 28. At that time, if the abnormal temperature control unit 38 detects 80 ° C or higher, the power switch
32 is turned off by the AC solenoid 33. This off work is repeated every predetermined time in consideration of the case where the power switch 32 cannot be turned off once, and while the power switch 32 cannot be turned off, the abnormality notification control unit 39 causes the LEDs 23, 24 and 25 to blink and the buzzer 34 to turn off. Abnormality is notified by intermittent operation.

The abnormality notification in this embodiment is the number of blinking LEDs,
The type is changed to correspond to the abnormality content, and the user is informed of the abnormality content.

When the course and time are set and the start key 28 is operated, first, the start flag is set. This start flag is cleared by the stop operation and the end of operation. The freeze check flag is checked, and if the flag is set, the freeze control unit 40 checks whether the thermistor detected temperature is 5 ° C. or lower. If the temperature is 5 ° C or lower, the freezing control unit 40 uses the pump 12
Is driven for 3 seconds by the 3-second counter 41. This 3
It is checked by the overcurrent detecting means 35 whether or not an overcurrent occurs in the pump driving state for a second. Immediately after the detection signal is output, the outputs of the drive system and the heating system are turned off and the abnormality notification is executed. Such an overcurrent is generated when the pump 12 is locked due to freezing, and the course is automatically stopped at the time of detection.

When 3 seconds have passed without detection of overcurrent, the freezing control unit 40 stops the pump 12, sets a freezing check flag, and proceeds to the next step.

Thus, if the freeze check flag is set, each process control unit 42 executes each process of prewashing, washing, rinsing, and drying according to the set course and time. In each process, the water supply valve 19 is opened to supply water, and when the cleaning water level switch 30 trips, the cleaning water level flag is set. When the door switch 10 detects that the door 2 is closed, a door flag is set.

When the set course ends, the start flag is cleared and the disconnection control unit 43 executes the auto power-off subroutine shown in FIG. That is, when the start flag is cleared, the 10-minute counter 44 starts counting, and when the count-up is started, the AC solenoid 33 is operated and the power switch 32 is urged to turn off.
The AC solenoid 33 is turned on / off for 0.5 seconds and turned off for 0.5 seconds 10 times. Then, the 10-minute counter 44 is cleared, but the power-off operation is continued every 10 minutes until the power switch 32 is turned off by the first operation of the AC solenoid 33. It should be noted that, even though it was dehumidified during the drying process during this period, the humidity of the air in the tank is higher than usual because it is not completely dehumidified. Therefore, if it is left as it is, the hot dishes may be cooled and dew condensation may occur on the dishes. Therefore, the double-sided fan 16 is intermittently rotated to circulate the air in the washing tank 3 to take out the dishes. Sometimes I try to avoid condensation as much as possible. If the start key 28 has not been operated for 10 minutes after the power is turned on, this auto power off subroutine is executed to automatically operate the AC solenoid 33 to turn off the power switch 32. During this time, the double-sided fan 16 is not rotated.

The abnormal water level flag is set when the abnormal water level switch 31 trips for 1 second or more, and at that time, the abnormal water level control unit
45 processes.

The washing process in the designated (selected) course is described in the flowchart of FIG. Here, first, it is determined whether or not the content of the process register 46 is 2, that is, whether or not the washing process is being performed, and then the subroutine for checking the washing water level switch 30 shown in FIG. 8 is executed. The drainage control unit 47 performs the drainage by rotating the pump 12 in the reverse direction when the cleaning water level flag is set even though the water supply end flag is not set. In general use, the cleaning water level should not be entered, so the cleaning level flag is not set (the cleaning level switch 30 is reset), but the cleaning level flag should be set if water is added manually. become. Thus, when the pump 12 is rotated in the reverse direction and drained, if the cleaning water level switch 30 is normal, the drainage counter 48 is reset and the flag disappears before counting a predetermined time,
If abnormal, the flag remains. If it is normal, the pump 12 is stopped, and if it is abnormal, the system output is stopped to notify the abnormality.

On the other hand, the water supply subroutine shown in FIG. 9 is the water supply control unit.
Performed by 49. Here, after checking the water supply end flag and the cleaning water level flag, the water supply valve 19 is opened to check the addition content of the water supply counter 50. If there is no manual water supply (hot water), the cleaning water level switch 30 is not actually checked, so whether the cleaning water level flag is set here (switch
30 is tripping). Water supply controller 49
When the flag is set, the water is supplied until 2 seconds later, the water supply valve 19 is closed, and the water supply counter 50 is stopped. Thus, if the flag is set by the time the water supply counter 50 counts 2 minutes,
Set the water supply end flag.

However, since manual water supply (hot water) is not performed many times during one operation, it is necessary to confirm that the content (water supply time) of the water supply counter 50 is within 10 seconds by the drainage abnormality counter 51 more than four times. If it is a coun, it is determined that the drainage condition is bad, and the water supply control unit 49 causes an abnormality notification as a drainage abnormality and stops the system output. Further, if the cleaning water level flag does not rise even if the water supply counter 50 has counted 2 minutes or more, the water supply control unit 49 notifies the cleaning water level switch 30 or the water supply system as an abnormality and closes the water supply valve 19 to pump the water. Rotate 12 in reverse to drain and stop other system output.

In this way, when the check of the cleaning water level switch 30, the water supply and drainage system is completed, the temperature control unit 52 checks the cleaning water temperature and sets a temperature check flag, and if the water temperature is already 60 ° C. or more, sets a time reduction flag.

The washing process control unit 40 first rotates the pump 12 forward to start washing. In addition, pump until the washing process is completed
12 is intermittently driven in the forward rotation direction, and the arm nozzle 6 is inverted each time to wash the dishes. Further, the 1-minute counter 52 is operated from the beginning of the washing process, and the count value of the ON counter 58 that counts the drive time T1 of the pump 12 is decreased until the counter 52 is counted up (for example, 8.
5 seconds), sprinkle the wash water on the dishes quickly and let them mix well. Then, when the counter 52 counts up, a one-minute elapsed flag is set and the driving time of the pump 12 until the cleaning is completed.
Set T2 to a time longer than the above drive time T1 (eg 28.5 seconds)
The contents of the ON counter 58 are automatically changed to continue the cleaning. The content T3 of the OFF counter 59 that counts the time for stopping the pump 12 to reverse the arm nozzle 6 is a constant value (for example, 1.5 seconds). The structure for reversing the arm nozzle 6 will be described later.

In parallel with the above operation, the temperature of the washing water is checked by the thermistor 11, and if it is 60 ° C. or less, the heater 7 is energized, and if it is 60 ° C. or more, the heater 7 is turned off. However, once the water temperature reaches 60 ° C or higher, a temperature reaching flag is set. In this way, when the 12-minute counter 60 counts up, the 12-minute elapsed flag is set and then the time reduction flag is viewed. If the time reduction flag is set (when the initial water temperature is 60 ° C or higher), the pump
12 and the heater 7 are stopped, and the drainage subroutine is executed. This drain subroutine is illustrated in FIG.
First, the pump 12 is rotated in the reverse direction to start discharging the cleaning water in the cleaning tank 3 through the drain pipe 13. At the same time,
The counting operation of the drainage counter 48 is also started. This count value is set to the time when the cleaning water in the cleaning tank 3 is half discharged. This completes the draining operation in the washing process.
This is because the temperature of the city water to be supplied next and the temperature of the tableware are high, so glass cups, etc. may be cracked by heat shock, so mix the city water and the wash water used in the washing process Once the water temperature of the city water and the wash water temperature (60
C.) and the temperature of dishes etc. is lowered by carrying out the following rinsing step using the wash water. In the drainage operation in the rinsing step, the drainage after the first rinse is performed by driving the pump 12 and opening the water supply valve 19 to drain the cleaning tank 3 while cleaning it. For the drainage after the second and subsequent rinses, drainage is performed with the water supply valve 19 closed.
In this rinsing step, the drainage operation is performed while the drainage counter 48 is operated twice.

After that, the content of the process register 46 is changed to the numerical value 3 indicating rinsing.

On the other hand, when the initial water temperature is 60 ° C. or lower, if the water temperature once reaches 60 ° C. and the arrival flag is set, the pump 12 and the heater 7 are stopped after 12 minutes. Furthermore, if the city water is used as it is from the beginning, the reaching flag does not go up even after 12 minutes have passed (that is, below 60 ° C), the washing work continues until the water temperature rises above 60 ° C, and 6 ° C. After reaching the above, the pump 12 and the heater 7 are stopped.

At the same time as the start of the washing step, when the 5-minute counter 61 is counted down and counted up, the stop time T3 of the pump 12 which is intermittently driven is made longer than usual only once (for example, 3 seconds), and the washing water level switch is set in the meantime. If 30 is detected and it trips, the washing process is continued, and if it does not trip, water is supplied. With this water supply, if the cleaning water level switch 30 does not trip within 10 seconds, it is determined that water leakage has occurred, the cleaning process is stopped, and an abnormality is detected.

The next rinse step is illustrated in FIG. This step is performed 4 times. First, the steps from the first time to the third time will be described below. After water is supplied, the heater 7 is energized, and the pump 12 is intermittently driven for the period counted by the ON counter 58 and the OFF counter 59 until the 1-minute counter 62 counts up, and the arm nozzle 6 is reversed. ,
Rinse the dishes. After that, the heater 7 is turned off, all flags are reset, and then the pump 12 is rotated in the reverse direction to perform drainage. This operation is repeated three times. Next, the fourth time
After water is supplied to the cleaning tank 3, the heater 7 is turned on and the pump 12 is driven in the same manner as above. However, the 1-minute counter 62 is not driven. Instead, the temperature is detected and first 65 ° C.
If it is detected, the display units 56 and 57 of the operation unit 21 are alternately turned on and off. This display is a sign that the sterilization process has been started. Further, when the washing water is heated to reach 71 ° C., the heater 7 is turned off at this point and the 2-minute counter 53 starts counting down. When this countdown is completed, the pump 12 is stopped, the display unit 56 of the operation unit 21 is turned off, and 57 is turned on. Then, all the flags are reset and the process register 46
Change the contents of to the numerical value 4 which indicates the drying process and drain the water.

Finally the drying process is illustrated in FIG. In this process, the drying process control unit 42 drives the motor 17 to rotate the double-sided fan 16. While the drying process counter 54 counts the set time, the heating controller 55 detects the temperature in the cleaning tank 3 with the thermistor 11 and controls the heater 7 to be turned on / off so as to be maintained at 65 ° C. That is, the heating control unit 55
Corresponds to 220 W when 20 minutes is set (heater 7 on for 40 seconds, 40 seconds off) according to the progress of process time, and the first 20 minutes is the same as the above 20 minutes output when 60 minutes is set. 183W for 20 minutes
The heater 7 is controlled so as to be equivalent (10 seconds on, 50 seconds off) and 157 W equivalent (10 seconds on, 60 seconds off) for the last 20 minutes. When the course change key 24 is selected with the course change key 24 before cleaning, the motor 17 is intermittently driven for 5 minutes after the drying process is started to rotate the double-sided fan 16. If the residual heat drying is set, the drying process is omitted and the course being executed is ended.

When the designated course ends, the buzzer 34 notifies the end.

The reversing operation mechanism of the arm nozzle 6 is shown in FIG. 13, FIG. 14, FIG. 15, FIG. 16 and FIG. The arm nozzle 6 is a long one in which an upper member 6 ′ made of synthetic resin and a flat lower member 6 ″ made of metal are joined at an interval that forms a channel 64.

The upper member 6'is formed with a plurality of nozzles 65 facing upward from the center to both outer ends, and bosses 66 are vertically provided at various places. The members 6'and 6 "are fixed.
Small-diameter propulsion nozzles 67 ′, 67 ″ are formed obliquely on both sides near the center of the nozzle 65 ′ at the outer end of the 65. The bosses 66 'for screwing the member 6 "are also hung vertically toward the center, and the ribs 68' are provided near the center of the one boss 66 'and near the outer end of the other boss 66". 68 ″ is hung vertically on both sides.

Thus, the propulsion nozzles 67 ', 67 "are obliquely provided in the opposite directions in the area surrounded by the bosses 66', 66" and the ribs 68 ', 68 ". An inclined member 69 is arranged on the lower member 6 ″ of the 64, and both bosses 66 ′, 6
It is fastened together with the lower member 6 "by 6" and screws. This inclined member 69 is an inclined surface that is lowered from directly below one propulsion nozzle 67 ″ toward the other propulsion nozzle 67 ′.
69F and an inclined surface 69R that is the opposite inclination of the inclined surface 69F are formed adjacent to each other. Therefore, the lowest position of one inclined surface 69F (hereinafter referred to as localization value 70F) and the other inclined surface 69R
And the highest position (position directly below the nozzle 67 ') are adjacent to each other, and a step 71F is formed there. Similarly, the highest position of one inclined surface 69F (position directly under the nozzle 67 ″)
The same relationship also occurs between the lowest position of the other inclined surface 69R (hereinafter referred to as localization value 70R) and a step 71R is formed.

The ball valve 72 as a rolling valve, which is rotatably housed in the flow path 64, is located at one of the orientation values 70F and 70R when being cleaned, and the ball valve 72 in the flow path 64 moves in the upstream and downstream directions. 71 steps
It is blocked by F, 71R and ribs 68 ', 68 ".

Further, one of the nozzles 65 ″ is deflected in the same direction (obliquely upward) as the propulsion nozzle 67 ′. The nozzles 65, 65 ′ are the first nozzles of the present invention, and The nozzle 65 ″ corresponds to the second nozzle.

Next, the operation during cleaning will be described. The pump 12 is driven to pump up the cleaning water in the cleaning tank 3, and the arm nozzle 6
When supplied inside, the cleaning water runs through the flow path 64 toward the outer end,
In the meantime, it is sprayed from the nozzles 65, 65 ', 65 "to wash the dishes and give a rotational force in the counterclockwise direction by the spraying force from the nozzle 65".

On the other hand, the ball valve 72 is pressed toward the step 71F by the cleaning water at the initially placed stationary portion, for example, 70F. At this time, the cleaning water is once deflected downward by the ribs 68 ″ and then flows toward the nozzle 67 ′, so that the cleaning water exerts a force to push up the ball valve 72 from the lower part of the ball valve 72 toward the step 71F. 72 rises above the step 71F, closing the nozzle 67 '.

As a result, the cleaning water is sprayed from the propelling nozzle 67 ″ to apply a counterclockwise rotational force to the nozzle 6. This rotational force is strong because the rotational force from the nozzle 65 ″ is applied.
The turning force is great. When the pump 12 is at rest, the ball valve 72
Falls on the highest part of the other inclined surface 69R, rolls down, and is placed on the other placing portion 70R.

When the pump 12 is re-driven, the wash water runs through the flow path 64 and is biased against the ball valve 72 against the boss 66 ″ and the ribs
Hit the 68 ″ and wrap around. And the propulsion nozzle 6
When heading toward 7 ″, the ball valve 72 is moved from the lower part toward the step 71R, and the ball valve 72 is lifted up so that the nozzle 67 ″ is closed.

As a result, the cleaning water is sprayed from the propelling nozzle 67 'and exerts a clockwise rotational force on the arm nozzle 6. This rotational force is reduced by the counterclockwise rotational force of the nozzle 65 ″, which reduces the rotational speed in this direction.

When the pump 12 is rested, the ball valve 72 will
It fell to the highest part of 69F, rolled, and one of the initial inclined surfaces 6
It returns to the stationary section 70F on the 9th floor.

Hereinafter, the above operation is repeated every time the pump 12 is driven and stopped.

(G) Effect of the Invention According to the present invention, it is possible to provide a highly reliable dishwasher in which washing water is not sprayed while the washing nozzle body is stopped, and dishes can be washed without fail.

[Brief description of drawings]

All of the figures are of the present invention, FIG. 1 is a sectional view of the dishwasher, FIG. 2 is a rear view with the rear plate removed, FIG. 3 is a front view, and FIG. 4 is a control block. FIG. 5 is a flow chart for explaining the main operation of the whole, FIG. 6 is a flow chart for explaining the operation of the washing step, FIG. 7 is a flow chart for explaining the operation of the auto power off, and FIG. FIG. 8 is a flow chart for explaining the operation of washing water level detection, FIG. 9 is a flow chart for explaining the water supply operation, FIG. 10 is a flow chart for explaining the drainage operation, and FIG. 11 is a rinsing process. Flow chart for explaining the operation, FIG. 12 is a flow chart for explaining the operation of the drying step, FIG. 13 is a plan view of the arm nozzle, FIG. 14 is a side sectional view of the arm nozzle, and FIG. FIG. 16 is a sectional view taken along line AA ′ of FIG. The figure is a sectional view taken along the line BB ′ of FIG.
FIG. 17 is a sectional view taken along the line CC ′ in FIG. 13. 3 ... Washing tank, 6 ... Arm nozzle, 12 ... Washing / drainage pump, 14 ... Circulation duct, 16 ... Double-sided fan, 18 ...
Water level detection case, 19 …… Water supply valve, 21 …… Operating section, 23,24,
25 …… LED, 26 …… Drying time change key, 27 …… Course change key, 28 …… Start key, 29 …… Microcomputer, 30 …… Washing water level switch, 31 …… Abnormal water level switch, 32 …… Power supply Switch, 33 …… AC solenoid, 46 ……
Process register, 53 ... 2 minute counter, 54 ... Drying process counter, 56, 57 ... Display, 61 ... 5 minute counter, 66 ...
… Boss, 67 ′, 67 ″ …… Propulsion nozzle, 68 ′, 68 ″ …… Rib, 69 …… Inclined member, 69R, 69F …… Down inclined surface, 70R, 70F
…… Stationary part, 72 …… Ball valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Yamane 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Morito Takaishi 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) Reference JP-A-2-49627 (JP, A) JP-B-49-44751 (JP, B2)

Claims (1)

(57) [Claims] 1. A long cleaning nozzle body disposed in a lower portion of a cleaning tank so as to be rotatable in a horizontal direction, a pump for supplying cleaning water to the cleaning nozzle body, and a driving means for intermittently driving the pump. A first nozzle provided on the upper surface of the cleaning nozzle body and spraying the cleaning water on dishes, and a first nozzle provided on both sides of one end of the cleaning nozzle body for spraying the cleaning water on the cleaning nozzle body. A pair of propulsion nozzles that apply a propulsive force for rotation to the propulsion nozzles, and a predetermined position in the vicinity of one of the propulsion nozzles in the cleaning nozzle body when the pump is operated, being pressed by a water flow to cause the propulsion nozzles to move. A dishwasher comprising a ball valve for closing one opening and a moving means for moving the ball valve to a predetermined position near the other propulsion nozzle by its own weight in the cleaning nozzle body when the pump is stopped, A second propelling force for rotating the washing nozzle body in a direction opposite to the direction of rotation by one of the propulsion nozzles by injecting the cleaning water, the propulsion force being weaker than the propulsion force of the propulsion nozzle. A dishwasher, wherein a nozzle is provided in the cleaning nozzle body.