JP2000254080A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately clean up foul of dishes while allowing the feeding of a treating agent at a specified timing with a simple structure. SOLUTION: A container-shaped detergent feeding part is arranged above a washing tank. A detergent is housed in the detergent feeding part and when washing water enters from above, the detergent housed spills out to be fed into the washing tank. At this point, when a prewashing operation course is selected, a control circuit operates a washing pump to inject washing water into a washing tank. In this operation, the control circuit operates the washing pump at a lower speed (2,000 rpm) in the number of revolutions than that in the washing process so that the injection force of the washing water from an injection arm is made so weak as to prevent the washing water from infiltrating into the detergent housing part. In the washing process, the washing pump is operated at the normal number of revolutions (3,000 rpm) to allow the entry of a large amount of the washing water into the detergent housing part, thereby feeding the detergent into the washing tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher provided with a function of automatically introducing a treating agent such as a detergent.

[0002]

In the conventional dishwasher, the standard course includes a washing process and a rinsing process (2.
Times), a heating rinsing step, and a drying step are sequentially performed. In this case, as a means for improving the washing performance of the dishwasher, there is provided a dishwasher which executes a so-called "pre-washing step" for roughly removing dirt prior to the washing step and then shifts to the washing step.

[0003] In the dishwasher in which the "pre-washing process" is set, it is necessary to prevent the introduced detergent from flowing into the washing tank in the pre-washing process. A detergent feeding device as disclosed in the official gazette is used.

That is, in FIG. 16 showing a dishwasher,
A detergent feeding device 3 is provided on the inner surface of the door 2 of the dishwasher 1, and a detergent and a dry finishing agent stored in advance are fed into the cleaning tank 4 at a predetermined timing according to the operation of the solenoid. ing. That is, after storing the detergent and the dry finish in the detergent dispensing device 3, the door 2 is closed and the start button is operated to start the pre-washing course operation, first, the pre-washing step is executed. In this pre-washing process, after the water supply valve is operated and water is supplied, the cleaning pump is operated and the cleaning water is sprayed to remove the rough dirt attached to the tableware and at the same time drainage is performed, Move to the cleaning process.

[0005] In the subsequent washing process, after the water supply by the water supply valve is completed, the cleaning pump is operated by injecting the cleaning water by operating the solenoid of the detergent charging device 3 to open the detergent charging port of the detergent charging device 3. By doing so, the detergent stored in the detergent input device 3 is poured out. Thereby, the detergent is put into the washing tank, so that the dirt attached to the tableware can be reliably removed by the detergent.

Further, in a heating and rinsing step in which the supplied cleaning water is jetted by the cleaning pump while being heated by the heater, the solenoid of the detergent charging device is operated again immediately before the cleaning pump is stopped, so that the cleaning water is stored in the detergent charging device. The tableware can be rinsed by feeding the dried finish.

However, the structure of the above-described detergent feeding device 3 is complicated and requires electrical control.
It is a factor of high cost. Moreover, the detergent input device 3
If the user forgets to close the detergent inlet, the detergent will flow out in the pre-washing process, and it will not be possible to reliably remove the dirt adhering to the dishes in the washing process with the detergent.

On the other hand, some dishwashers have been provided which can set a so-called "hot water wait control operation". In other words, if you connect a water heater to the dishwasher and supply hot water,
Although the dishwasher can generally reduce the operation time, when the temperature of the hot water supplied at the start of the operation of the dishwasher is low, heating by a heater is required, and as a result, the operation time is reduced. You may not be able to do it.

Therefore, when the hot water supply is used, the "hot water wait control operation"
If is selected, a predetermined amount of hot water is supplied from the water heater to the cleaning tank, and if the temperature of the supplied hot water is, for example, lower than 40 ° C., it is determined that the water is not suitable for cleaning and the drain pump is operated. I try to drain. Such an operation is repeated until the temperature of the hot water supplied from the water heater becomes 40 ° C. or more, and when the hot water of 40 ° C. or more is supplied, the process shifts to the washing step. Therefore, until the temperature of the hot water supplied from the water heater becomes 40 ° C. or more, the supplied hot water is wastefully discharged.

[0010] Therefore, in the above-mentioned "hot water waiting control operation", the pre-washing process (hereinafter, referred to as "hereinafter") is performed by injecting low-temperature hot water from the hot water supply which has been wastefully discharged into the tableware.
It is considered that a large dirt attached to tableware is removed by performing a temporary pre-washing step).

However, as in the case of the above-mentioned pre-washing step, it is necessary to provide a detergent feeding device so that the detergent is not put into the washing tank during the extra pre-washing step, which causes a cost increase and a detergent input port. If the operator forgets to tighten the detergent, the detergent flows out during the extraordinary pre-washing step, so that the detergent attached to the tableware cannot be reliably removed in the washing step.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dishwasher capable of supplying a treating agent at a predetermined timing with a simple configuration and capable of reliably removing stains on tableware. To provide.

[0013]

SUMMARY OF THE INVENTION The present invention provides a cleaning tank for storing an object to be cleaned, a water supply valve for supplying cleaning water,
Tableware comprising a cleaning pump for injecting the cleaning water supplied through the water supply valve into the cleaning tank, a drainage pump for draining the cleaning water to the outside, and control means for controlling the operation of the cleaning pump. The cleaning machine further includes a processing agent storage unit that is disposed in the cleaning tank, stores therein a processing agent such as a detergent, and is provided so that the cleaning water injected into the cleaning tank can enter therein. By controlling the number of revolutions of the pump, the cleaning water is caused to enter the processing agent storage section at a predetermined timing (claim 1).

According to such a configuration, the control unit controls the number of rotations of the cleaning pump to adjust the spraying power of the cleaning water to the cleaning tank. Therefore, since the cleaning water can be made to enter the processing agent storage section by adjusting the jetting force of the cleaning water, the processing agent such as the detergent stored in the processing agent storage section is charged into the cleaning tank at a predetermined timing. Can be. In this case, a simple structure can be adopted as the treatment agent storage part, so that the cost can be significantly reduced as compared with the detergent introduction device used conventionally.

Further, the processing agent storage section is arranged at a position where the cleaning water cannot enter when the cleaning pump is operated at a low speed rotation. The cleaning pump may be operated at a low speed (claim 2).

According to such a configuration, when the processing agent stored in the processing agent storage section is not desired to flow out, the cleaning pump is operated at a low speed by the control means. This allows
Since the cleaning water does not enter the processing agent storage section, it is possible to prevent the processing agent from flowing out.

Further, the control means, when executing a pre-washing step of roughly removing dirt prior to the washing step of washing using a detergent, operates the washing pump at a lower speed than during the washing step. (Claim 3).

According to such a configuration, in the pre-washing step, the cleaning pump is operated at a lower speed than during the cleaning step, so that the cleaning water does not enter the processing agent storage section, and the processing agent storage The detergent stored in the section does not flow out.

When the cleaning process is performed, the cleaning pump is operated at the normal speed, so that the jetting power of the cleaning water increases. As a result, the cleaning water enters the processing agent storage section, so that the detergent stored in the processing agent storage section flows out, and the cleaning process can be reliably performed.

Further, the control means may operate the cleaning pump at a higher speed than normal rotation at an early stage of the cleaning process. According to such a configuration, the cleaning water is strongly sprayed into the cleaning tank in the early stage of the cleaning process, so that the cleaning water easily enters the processing agent storage unit, and the detergent stored in the processing agent storage unit is accordingly quickly released. You can pour it out.

In addition, a tableware storage basket of a plurality of upper and lower stages is provided,
The processing agent storage section may be mounted on an upper stage of the tableware storage basket (claim 5). According to such a configuration, the jetting power of the cleaning water becomes weaker as the cleaning tank is located at an upper position. Therefore, the cleaning pump is provided by mounting the treating agent storage section on the upper stage of the upper and lower tableware storage baskets. It is possible to prevent the cleaning water from entering the processing agent storage section when the device is operated at a low speed. Therefore, the user can arrange the processing agent storage section at an appropriate position only by mounting the processing agent storage section on the upper stage of the tableware storage basket, which is excellent in usability.

Further, the control means includes a detecting means for detecting the temperature of the supplied washing water, and when the temperature of the washing water detected by the detecting means is lower than a predetermined temperature, the control means sets the cleaning pump to a higher position than during the cleaning step. The operation may be performed at a low speed and at the same time, a temporary pre-washing step for operating the drainage pump may be performed, and then the process may be shifted to the washing step (claim 6).

According to such a configuration, in the hot water waiting control operation in which hot water is supplied from the water heater to the dishwasher to reduce the operation time, the temperature of the hot water supplied from the water heater is lower than the predetermined temperature. The control means executes a temporary pre-washing step of operating the drainage pump while operating the cleaning pump at low speed. This makes it possible to remove large dirt attached to the tableware by the low-temperature hot water that has been wastefully discharged during the conventional hot water waiting control operation.

In this case, since the cleaning pump is operated at a low speed, the cleaning water injected into the cleaning tank does not enter the processing agent storage section. It is possible to prevent the stored detergent from flowing out.

Further, the control means repeats the temporary pre-washing step until the cleaning water at a predetermined temperature or more is supplied, and shifts to the cleaning step when the temporary pre-washing step is performed a predetermined number of times. (Claim 7).

According to such a configuration, if the supply of hot water having a temperature equal to or higher than the predetermined temperature from the water heater is delayed, it is wasteful to wait until the temperature of the hot water becomes equal to or higher than the predetermined temperature. When the temporary pre-washing step has been performed a predetermined number of times, the control means shifts to the cleaning step. This can prevent the operation time from becoming excessively long.

The control means may notify an abnormality if the temperature detected by the detection means is less than the predetermined temperature when the extraordinary pre-washing step is performed a predetermined number of times.

According to such a configuration, when the water heater is out of order or when the water heater is not ignited,
Since hot water having a temperature equal to or higher than the predetermined temperature is not supplied from the water heater, the control unit notifies the abnormality when the temperature detected by the detection unit is less than the predetermined temperature when the temporary pre-washing step is performed a predetermined number of times. Thereby, the user can quickly cope with the notification of the abnormality.

Further, the treatment agent storage section is disposed at a position where the cleaning water enters, in a state where the finishing agent is stored and the cleaning pump is operated at a higher speed than normal rotation.
The cleaning pump may be operated at a higher speed than normal rotation at a predetermined timing in a rinsing stroke (claim 9).

According to such a configuration, when, for example, a dry finish stored in the processing agent storage section is supplied at a predetermined timing in the rinsing process, the control means normally controls the cleaning pump at a predetermined timing in the rinsing process. Operate at a higher speed than the speed. As a result, the jetting power of the cleaning water increases and enters the processing agent storage unit.
For example, a dry finishing agent stored in the processing agent storage unit can be poured into the cleaning tank.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. FIG.
Shows a dishwasher in cross section. In FIG. 2, the dishwasher 11 has an inner box 13 disposed in an outer box 12, and the inside of the inner box 13 functions as a washing tank 14.

The front of the washing tank 14 can be closed by a door 15, and when the door 15 is opened, the tableware storage basket 1 is opened.
6 can be taken in and out (see FIG. 3). A heater 17 is provided at the bottom of the cleaning tank 14, and a jetting arm 18 is positioned above the heater 17 to support the arm support 1.
9 rotatably supported.

An electric equipment room 20 is formed between the outer case 12 and the inner case 13 on the back side of the cleaning tank 14, and a water supply valve 21 is provided in the electric equipment room 20. This water supply valve 2
Numeral 1 is connected to the water supply through a water supply pipe 22, and the cleaning water from the water supply is supplied to the cleaning tank 1 with the water supply valve 21 operated.
4 is supplied.

Further, a fan motor 23 is provided in the electric equipment room 20, and a fan 25 is provided in a blower duct 24 formed between the inner box 13 and the electric equipment room 20. When the fan 25 is rotated by the drive of the motor 23, the air sucked from the back of the outer box 12 is blown to the lower side of the washing tank 14. Therefore, by driving the fan motor 23 while the heater 17 is energized, hot air is generated and sent to the cleaning tank 14, and at the same time, the hot air is discharged to the outside from the outlet 26 formed in the door 15.

A machine room 27 is formed below the washing tank 14 between the outer box 12 and the inner box 13. The machine room 27 has a unitized washing pump 28 and drain pump 29, The pump motor 30 for rotating this pump is provided. The pump motor 30 is rotatable in the forward and reverse directions. The forward rotation of the pump motor 30 activates the cleaning pump 28, and the reverse rotation activates the drainage pump 29.

A water storage tank 31 is formed on the bottom surface of the cleaning tank 14, and the inside of the water storage tank 31 and the cleaning pump 28 are formed.
And a suction port of the drain pump 29 are connected by a connection pipe 32.

The discharge port of the cleaning pump 28 has an arm support 19.
The discharge port of the drain pump 29 is connected to a drain hose (not shown) through a drain pipe 33.

With the above configuration, when the pump motor 30 is rotating forward, the washing pump 28 is operated, and the washing water in the water storage tank 31 is ejected from the ejection arm 18. The cleaning water is sprayed onto the entire cleaning tank 14 while the arm 18 rotates.

The electrical equipment room 20 is provided with a well-known water level detecting device 34. The water level detection device 34 is
1 and the connection pipe 35, and the water storage tank 31
The level of the washing water stored in the water is detected.

An operation panel is provided on the lower part of the front surface of the outer box 12. FIG. 4 shows an operation panel. This figure 4
, An operation panel 36 is provided with a power switch 37, a start / pause switch 38, an operation course changeover switch 39, a drying time changeover switch 40, and a display section 41 showing the selection result. I have. Further, a display unit 42 for indicating the currently executed process is provided. Various electronic circuits for control are arranged on the back side of the operation panel 36.

FIG. 5 shows the overall electrical configuration. In FIG. 5, a control circuit (corresponding to control means) 43 includes:
The rotation direction and the number of rotations of the pump motor 30 are controlled through an inverter circuit 45 based on a signal from a switch input section 44 for inputting a signal from each switch provided on an operation panel 36, and a display section 41 is provided through a drive circuit 46. , 42, a buzzer 47, a water supply valve 21, a heater 17, and a fan motor 23 are driven at a predetermined timing to execute a predetermined operation course.
4. A predetermined operation course is executed while monitoring a signal from a thermistor 49 as a detection means for detecting the temperature of the supplied washing water by the door switch 48.

As shown in FIG. 3, the tableware storage basket 16 is formed in two upper and lower tiers, and a detergent storage portion (corresponding to a treatment agent storage portion) 50 is mounted on the upper tier. As shown in FIG. 6, the detergent accommodating portion 50 has a container shape, and a meandering detergent outflow passage 51 is formed at a lower portion thereof. The detergent outflow passage 51 is formed so as to be slightly inclined in the outflow direction, and the terminal end thereof is opened so as to face downward in the drawing. A hook portion 52 is formed in the detergent storage portion 50, and the hook portion 52 can be mounted by hooking the hook portion 52 on the tableware storage basket 16.

Next, the operation of the above configuration will be described. When washing dishes, the dishes are stored in the dish storage basket 16 and then the detergent storage section 50 in which a predetermined amount of detergent is stored is mounted on the upper stage of the dish storage basket 16. Then, the door 15 is closed while the tableware storage basket 16 is stored in the washing tank 14.

When a large amount of dirt is attached to the tableware, a prewashing course is selected by the operation course changeover switch 39, and the start switch 38 is operated. FIG. 1 is a timing chart showing the operation of the pre-wash course by the control circuit 43. In FIG. 1, when the start switch 38 is operated in a state in which the pre-washing course is selected, the control circuit 43 first supplies a predetermined amount of washing water to the water storage tank 31 by operating the water supply valve 21. Then, the cleaning pump 28 is operated for one minute by rotating the pump motor 30 forward. At this time, the control circuit 43 operates the rotation speed of the pump motor 30 and thus the washing pump 28 at a low speed of 2000 rpm by the inverter circuit 45. Therefore, since the jetting power of the washing water from the jet arm 18 is weak, even if the jetted washing water rebounds on the wall surface of the washing tank 14, the washing water does not enter the inside of the detergent accommodating section 50 from the upper surface. .

On the other hand, even if the jetting power of the washing water from the jetting arm 18 is weak, large dirt adhering to the tableware can be easily removed. Subsequently, the drain pump 29 is operated for 40 seconds by reversing the pump motor 30.
Thereby, the dirty washing water in the water storage tank 31 can be drained.

As described above, when the pre-washing step has been completed, the process proceeds to the washing step. In this cleaning process, the control circuit 43 activates the cleaning pump 28 for 15 minutes by rotating the pump
Turn on electricity. At this time, the control circuit 43 controls the rotation speed of the pump motor 30 to 3000 rpm by the inverter circuit 45.
Since the rotation is controlled to the normal rotation, the spraying power of the washing water from the spraying arm 18 is strong, and the washing water bounces strongly on the wall surface of the washing tank 14 and enters the inside from the upper surface of the detergent accommodating section 50. As a result, the detergent accommodated in the detergent accommodating section 50 flows out through the detergent outflow passage 51 and is put into the washing tank 14, and the dirt attached to the tableware is removed by the detergent.

Then, as the cleaning process proceeds, the temperature of the cleaning water gradually rises, and the control circuit 43 determines that the temperature detected by the thermistor 49 has reached 60 ° C.
The power supply to the heater 17 is controlled so as to maintain the temperature. After such washing control is performed for, for example, 15 minutes, the washing process is completed by sequentially executing drainage control, water supply control, water supply and drainage control, and drainage control as shown in FIG. Move to

In the rinsing process, as shown in FIG. 1, water supply control, rinsing control, drainage control, water supply control, water supply / drainage control, and drainage control are sequentially performed, and such a rinsing process is performed once more. Then, the process proceeds to the heating rinsing step.

In the heating and rinsing step, as shown in FIG. 1, the water supply control, the heating and rinsing control, and the drainage control are performed, and then the process proceeds to the drying step. In the drying step, drying control is performed as shown in FIG.

According to such a configuration, when the pre-washing operation is performed in a state where the detergent accommodating section 50 accommodating the detergent is disposed above the washing tank 14, the washing pump 28 is turned on during the pre-washing step. Since the operation is performed at a lower rotation speed, the detergent stored in the detergent storage section 50 does not flow out during the pre-washing process, so that it is possible to remove the large dirt attached to the dishes and to store the detergent in the washing process. The detergent contained in the section 50 can be poured into the cleaning tank 14 by reliably flowing out the detergent. Therefore, as compared with the conventional configuration in which the detergent inlet is closed in the pre-washing step and the detergent inlet is opened in the washing step, the detergent accommodating section 50 has a simple structure for accommodating the detergent. Is simply arranged in the cleaning tank 14, and only the rotation control of the pump motor 30 is executed. Therefore, the operation can be performed with a simple configuration, and the cost can be greatly reduced. Since it can be put in reliably, dirt attached to tableware can be reliably removed.

For the user, the detergent storage 50
The detergent storage unit 50 can be arranged at an appropriate position by mounting the upper and lower tableware storage baskets 16 on the upper tier, which is excellent in usability.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is characterized in that the time until the detergent stored in the detergent storage section 50 is completely introduced into the cleaning tank 14 is shortened.

That is, in FIG. 7 showing the timing of the pre-washing operation course, the control circuit 43 sets the rotation speed of the pump motor 30 to 3500 rp for only 2 minutes at the beginning of the washing process.
m, and thereafter, it is controlled to the normal rotation speed of 3000 rpm. As a result, a large amount of washing water enters the detergent accommodating section 50 in a short period of time in the early stage of the washing process. Can be exhibited in a short time.

According to such an embodiment, the time required until the detergent is introduced into the cleaning tank 14 can be reduced by controlling the rotation speed of the pump motor 30, so that it can be dealt with only by changing the program. , And can be easily implemented without increasing the cost.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. The third embodiment is different from the first embodiment in that a function similar to that of the pre-washing step is added during the hot water waiting control operation.

In FIG. 8 showing the operation panel, the operation panel 36 is provided with a hot water wait control operation switch 53 and a display unit 54 thereof. This hot water wait operation control means that when a hot water supply is connected to the dishwasher 11 and hot water is supplied, the operation time can be shortened. Therefore, the temperature of the supplied washing water is detected, and the temperature is detected. For example, when the temperature is 40 ° C. or higher, the overall operation time is reduced by shortening the washing control time in the washing process.

FIG. 9 is a flowchart showing the operation of the hot water waiting control operation. In FIG. 9, the control circuit 43
Executes the hot water waiting process when the hot water waiting control operation course is selected. In this hot water waiting process, when the start switch 38 is operated (S101), the water supply valve 2
1 is turned on (S102), and when the water level of the washing water stored in the water storage tank 31 reaches the predetermined water level by the water level detection device 34 (S103: YES), the water supply valve 21 is turned off (S104).

Subsequently, the temperature of the supplied washing water is detected by the thermistor 49, and when the detected temperature is lower than 40 ° C. (S105: NO), the dishes are temporarily washed by washing the supplied washing water. Perform prewashing steps. That is, after the cleaning pump 28 is turned on for one minute (S106, 10
7), the cleaning pump 28 is turned off (S108). At this time, the control circuit 43 operates the pump motor 30 and thus the washing pump 28 at a low rotation speed of 2000 rpm (see FIG. 10). As a result, the jetting power of the washing water from the jet arm 18 is weak, and the jetted washing water is
Since there is no intrusion into and outflow into 0, large dirt adhering to tableware can be removed. Subsequently, the control circuit 43 turns on the drain pump 29 for 40 seconds (S109, 110), and then turns off the drain pump 29.

Then, the temperature of the washing water from the water heater becomes 40
If the temperature is equal to or higher than C (S105: YES), the process proceeds to the cleaning process. At this time, the control circuit 43 controls the pump motor 30 and hence the
Since the operation is performed at a normal rotation of 0 rpm (see FIG. 10), a large amount of washing water enters the detergent storage section 50, and the detergent stored in the detergent storage section 50 flows out and is introduced into the cleaning tank 14. . In this case, when the control circuit 43 executes the cleaning process with the cleaning water at 40 ° C. or higher, the cleaning time in the cleaning process is reduced to, for example, 10 minutes, thereby reducing the overall operation time.

According to the third embodiment, when the hot water waiting control operation is set, dishes are washed with low-temperature hot water until the temperature of hot water supplied from the water heater becomes 40 ° C. or higher. The temporary pre-washing step is performed and the jetting force of the washing water from the injection arm 18 is weakened. Therefore, even if the temporary pre-washing step is executed during the hot water waiting control operation, the detergent is not used in the temporary pre-washing step. While preventing the detergent stored in the storage unit 50 from flowing out, it is possible to remove large dirt attached to the tableware.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIG. This fourth embodiment is:
In the hot water waiting process described in the third embodiment, the present invention is characterized in a countermeasure for a case where the temperature of the washing water supplied from the water heater continues to be lower than 40 ° C.

That is, in FIG. 11, which shows a flowchart of the operation of the hot water waiting process, the control circuit 43 increments the count value each time the temporary pre-washing process is executed (S2).
01), if the temperature of the washing water from the water heater is lower than 40 ° C. even if the temporary pre-washing step is performed five times (S202:
YES), the process shifts to the cleaning process. In this case, the control circuit 43 changes the washing time in the washing process to 15 minutes when the washing process is performed with the washing water having a temperature of less than 40 ° C. By heating, the dirt attached to the tableware can be reliably removed by the detergent.

According to the fourth embodiment, even when the temperature of the washing water from the water heater continues to be low as in winter, the temporary pre-washing step is repeated five times. Since the process shifts to the cleaning step, it is possible to prevent the entire operation time from becoming excessively long.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIG. This fifth embodiment is:
In the hot water waiting process described in the third embodiment, the present invention is characterized in a countermeasure for a case where the temperature of the washing water supplied from the water heater continues to be lower than 40 ° C.

That is, in FIG. 12 showing a flowchart of the operation of the hot water waiting process, the control circuit 43 determines that the temperature of the washing water from the water heater is lower than 40 ° C. even if the temporary pre-washing process is performed five times. (S202: YES), it is determined that the water heater is abnormal and the abnormality is notified by the buzzer 47 (S301), and then the water heater is stopped (S30).
2).

According to the fifth embodiment, when the temperature of the washing water is low and the extraordinary pre-washing step is repeated five times, the abnormality is notified, so that the user can use the water heater. Abnormalities can be dealt with promptly.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described with reference to FIG. The sixth embodiment has a feature in a coping method after the abnormality notification described in the fifth embodiment.

That is, in FIG. 13 showing a flowchart of the operation of the hot water waiting process, the control circuit 43 determines that the temperature of the washing water from the water heater is less than 40 ° C. even if the temporary pre-washing process is performed five times. (S202: YES), the abnormality is notified (S301), and the operation is temporarily stopped (S40).
1) When the start switch 38 is operated in the temporary stop state (S402: YES), the process shifts to the cleaning process.

According to the sixth embodiment, when the user operates the start switch 38 after the notification of the abnormality, the process shifts to the cleaning process. Therefore, the sixth embodiment is compared with a configuration in which the hot water waiting process is executed again after the notification of the abnormality. As a result, it is possible to avoid a useless operation of re-executing the extraordinary pre-washing step in accordance with the user's intention, and the usability is excellent.

(Seventh Embodiment) Next, a seventh embodiment of the present invention will be described with reference to FIGS. The seventh embodiment is characterized in that the dry finish stored in the finish storing section is supplied to the cleaning tank 14 at a predetermined timing.

That is, as shown in FIG. 14, a detergent storage section 50 is mounted on the upper stage of the tableware storage basket 16 in the upper and lower stages arranged in the washing tank 14, and the wire material forming the tableware storage basket 16 is The finishing agent storage section (processing agent storage section) 55 is attached to the uppermost wire. That is, the finishing agent storage unit 55 is disposed above the detergent storage unit 50. This finishing agent storage section 55
Is formed in substantially the same shape as the above-described detergent storage section 50, and stores a dry finish, for example.

The prewashing operation course is started in a state where the detergent is stored in the detergent storage section 50, the dry finish is stored in the finish storage section 55 and the dish storage basket 16 is mounted. In this case, the finishing agent storage unit 55 is provided in the cleaning tank 1
4, the gap between the upper surface opening of the finishing agent storage 55 and the ceiling of the cleaning tank 14 is small.

FIG. 15 is a timing chart of a pre-washing operation course to which the control of the addition of a dry finish agent is added. In FIG. 15, the control circuit 43 executes a pre-washing step in the same manner as in the first embodiment to remove large dirt attached to tableware,
The cleaning process is executed by putting the detergent contained in the cleaning tank 14 into the cleaning tank 14, and then the cleaning process and the rinsing process (2
Times) and the heating and rinsing steps are sequentially performed.

Here, since the finishing agent storage unit 55 is disposed at a position higher than the detergent storage unit 50 and close to the ceiling surface of the cleaning tank 14, the pump motor 30 is operated at a normal rotation of 3000 rpm. Therefore, even when the jetting power of the washing water from the jetting arm 18 is strong, it is difficult for the washing water to enter the finishing agent storage portion 55 having a small gap size with the ceiling surface of the washing tank 14. Thereby, even if the pre-washing step, the washing step, the rinsing step, and the heating rinsing step are executed, the dry finish stored in the finish storing section 55 does not flow out.

When the washing water reaches 65 ° C. in the heating and rinsing control in the heating and rinsing step, the control circuit 43 switches the pump motor 30 and thus the washing pump 28 to 4000.
Operate at high rpm. Thereby, the injection arm 1
Since the jetting power of the cleaning water from the cleaning tank 8 is increased and the cleaning water 14 is also strongly sprayed on the top surface of the cleaning tank 14, the cleaning water enters the finishing agent storage section 55 and is stored in the finishing agent storage section 55. The dried finish flowing out flows into the cleaning tank 14. Such high-speed rotation of the pump motor 30 is performed until the temperature of the washing water reaches 70 ° C., and when the temperature of the washing water reaches 70 ° C., the heating and rinsing control ends.

According to the seventh embodiment, when the dry finish stored in the finish storing section 55 disposed above the cleaning tank 14 is supplied to the cleaning tank 14, the cleaning pump 28 is operated. Since the rotation is performed at a higher speed than the normal rotation, the rotation can be easily controlled by controlling the rotation of the pump motor 30 as in the case where the detergent stored in the detergent storage unit 50 is supplied.

The present invention is not limited to the above embodiments, but can be modified or expanded as follows. An opening / closing member for closing the detergent outflow passage 51 by a spring member is provided at the end of the detergent outflow passage 51 of the detergent accommodating portion 50. When a large amount of washing water containing the detergent flowing out from the detergent outflow passage 51 becomes large, the detergent is removed from the washing tank 14. May be configured to be supplied at once.

[0078]

As is apparent from the above description, according to the dishwasher of the present invention, the cleaning water is caused to enter the treating agent storage section arranged in the cleaning tank at a predetermined timing by controlling the rotation of the cleaning pump. With such a configuration, there is an excellent effect that the processing agent can be supplied at a predetermined timing with a simple configuration, and the stains on the tableware can be reliably removed.

[Brief description of the drawings]

FIG. 1 is a timing chart showing the operation of a control circuit according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a dishwasher;

FIG. 3 is a perspective view of the dishwasher with the dish storage basket removed.

FIG. 4 is a front view of an operation panel.

FIG. 5 is a block diagram schematically showing an electrical configuration.

FIG. 6 is a cross-sectional view of a detergent storage unit.

FIG. 7 is a view corresponding to FIG. 1, showing a second embodiment of the present invention;

FIG. 8 is a view corresponding to FIG. 4, showing a third embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the control circuit in the hot water waiting process.

FIG. 10 is a diagram corresponding to FIG. 1;

FIG. 11 is a view corresponding to FIG. 9 showing a fourth embodiment of the present invention.

FIG. 12 is a view corresponding to FIG. 9 showing a fifth embodiment of the present invention.

FIG. 13 is a view corresponding to FIG. 9, showing a sixth embodiment of the present invention.

FIG. 14 is a view corresponding to FIG. 3, showing a seventh embodiment of the present invention;

FIG. 15 is a diagram corresponding to FIG. 1;

FIG. 16 is a diagram corresponding to FIG. 3 showing a conventional example.

[Explanation of symbols]

11 is a dishwasher, 14 is a washing tank, 16 is a dish storage basket, 18 is a spray arm, 21 is a water supply valve, 28 is a washing pump, 29 is a drainage pump, 30 is a pump motor, and 43 is a control circuit (control means). Reference numeral 50 denotes a detergent storage section (processing agent storage section), and reference numeral 55 denotes a finish agent storage section (processing agent storage section).

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenji Suzuki 991 Anata-cho, Seto-shi, Aichi Prefecture Inside the Toshiba Aichi Factory Co., Ltd. (72) Inventor Yoshio Ikeda 991, Anata-cho, Seto-shi, Aichi Prefecture Inside the Aichi Plant, Toshiba Corporation (72) Inventor Genichiro Kono 991, Anada-cho, Seto-shi, Aichi Prefecture F, Nagoya Office, Toshiba A-B Terms (reference) 3B082 BF01 BF05 CC01 CC05

Claims (9)

[Claims] 1. A cleaning tank for storing an object to be cleaned, a water supply valve for supplying cleaning water, a cleaning pump for injecting the cleaning water supplied through the water supply valve into the cleaning tank, and a cleaning pump. In a dishwasher provided with a drainage pump for draining water to the outside and control means for controlling the operation of the drainage pump, a treatment agent such as a detergent is disposed in the washing tank and the washing tank is stored. A processing agent storage unit provided so that the cleaning water injected into the processing agent can enter, and the control unit controls the rotation speed of the cleaning pump to cause the cleaning water to enter the processing agent storage unit at a predetermined timing. A dishwasher characterized by that: 2. The processing agent storage section is disposed at a position where cleaning water cannot enter when the cleaning pump is operated at a low speed rotation. When the cleaning water does not enter the processing agent storage section, the control means includes: The dishwasher according to claim 1, wherein the washing pump is operated at a low speed. 3. The control device according to claim 1, wherein the control unit controls the cleaning pump to operate at a lower rotation speed than during the cleaning process when performing a pre-cleaning process of roughly removing dirt prior to the cleaning process of performing cleaning using a detergent. The dishwasher according to claim 2, characterized in that: 4. The dishwasher according to claim 3, wherein the control means operates the cleaning pump at a higher speed than a normal rotation at an early stage of the cleaning process. 5. The dishwasher according to claim 2, further comprising a plurality of upper and lower tableware storage baskets, wherein the treatment agent storage part is mounted on an upper stage of the tableware storage basket. Machine. 6. A detecting means for detecting a temperature of the supplied washing water, wherein the control means, when the temperature of the washing water detected by the detecting means is lower than a predetermined temperature, causes the washing pump to operate more than during the washing process. 2. The dishwasher according to claim 1, wherein a temporary prewashing step of operating the drainage pump at the same time as the low-speed operation is performed, and then shifting to a washing step. 7. The control means executes the extraordinary pre-washing step repeatedly until the washing water at a predetermined temperature or more is supplied, and shifts to the washing step when the extraordinary pre-washing step is executed a predetermined number of times. The dishwasher according to claim 6, characterized in that: 8. The tableware according to claim 6, wherein the control means notifies the abnormality when the temperature detected by the detection means is lower than the predetermined temperature when the temporary pre-washing step is performed a predetermined number of times. washing machine. 9. The processing agent storage section is disposed at a position where cleaning water enters when the finishing agent is stored and the cleaning pump is operated at a higher rotation speed than normal rotation. 2. The dishwasher according to claim 1, wherein the washing pump is operated at a timing higher than normal rotation.