JP2567743B2 - Dishwasher - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a Ru <br/> relates to a dishwasher.

[0002]

2. Description of the Related Art A dishwasher / dryer of this type is disclosed in JP-A-63 / 1988.
No. 288122. This one is
Equipped with a control unit to wash, rinse, rinse with hot water, and dry the dishes stored in the cavity in sequence.
In the hot water rinsing step, the control unit opens the water supply valve to supply water into the cavity, and heats the supplied rinsing water with a heater to rinse the tableware by spraying it on the tableware from a nozzle. After the predetermined time, the drainage pump is driven and the drainage operation of draining the rinse water in the cavity from the recess at the bottom of the cavity is sequentially executed, and then the drying step is performed.

[0003]

SUMMARY OF THE INVENTION In the above conventional example,
Since the recess at the bottom of the cavity and the drainage pump are installed at almost the same height from the floor surface, if the rinse water in the cavity is drained to some extent during the drainage operation in the hot water rinsing process, the drainage pump will cause air damage. Then the drainage pump runs idle and cannot drain water. Therefore, the rinse water that could not be drained accumulates in the recess at the bottom of the cavity as residual water. This residual water has a high water temperature, and since the temperature inside the cavity is raised by the heater during the drying process, it easily evaporates and raises the humidity inside the cavity. You will get wet again.

The present invention solves such a problem.

[0005]

Means for Solving the Problems The means of the present invention to solve the problems described above, a cavity for accommodating the dishes, disposed within said cavity, a nozzle for spraying water on the dishes, the cavity Means for supplying water to
A heating means for heating water in the cavity, a drainage means for draining water in the cavity, a blowing means for blowing dry air in the cavity, and a drive signal for each means, and a washing step , rinsing process, hot water rinsing process, dishes and a control means for executing the drying step sequentially
In the washer / dryer , the control means, in the hot water rinsing step , a water supply operation of supplying rinse water into the cavity, heating the rinse water by the heating means, and heating the rinse water by the heating means. A hot water rinsing operation of spraying from the nozzle and a drainage operation of draining the rinse water in the cavity by the drainage means are sequentially performed , and water is supplied to the cavity for a predetermined time during the draining operation. The feature is that it also performs an operation .

[0006]

[Function] By performing the water supply operation for a predetermined time during the rinsing water draining operation after the hot water rinsing operation, the water temperature of the residual water at the bottom of the cavity can be lowered at the end of the draining operation, and the residual water in the cavity is not removed during the drying process. Less likely to evaporate.

[0007]

Embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 is the main body of the dishwasher / dryer of the present invention. 2 is a cavity for accommodating tableware, which has an opening 3 on the front surface, an outlet 4 on the upper rear surface, and a discharge port 5 on the lower rear surface. 6 is a rear face plate that closes the rear portion of the cavity 2, 7 is connected to the outlet 4 and the outlet 5,
A circulation air passage 8 for deriving the internal air from the outlet 4 and returning it to the cavity 2 from the outlet 5 for circulation is formed between the circulation air passage 7 and the rear plate 6, and is a cooling air passage for passing the outside air. is there.
Reference numeral 9 denotes a double-sided fan that serves as a blower, and is arranged at a position separating the circulation air passage 7 and the cooling air passage 8 so that the air in the circulation air passage 7 and the air in the cooling air passage 8 are forcedly circulated at the same time. It also serves as a heat exchanger that transfers the heat of the air in the air passage 7 to the air in the cooling air passage 8. Reference numeral 10 is a motor for rotating the double-sided fan 9, 11 is a water supply port provided on a side portion of the circulation air passage 7,
Reference numeral 2 is a water supply valve which is disposed on the rear surface side of the cavity 2 and is connected to the water supply port 11 to serve as water supply means. The water supply valve 12
When opened, cleaning water or rinsing water is supplied from the discharge port 5 into the cavity 2 through the water supply port 11. A heater 13 is arranged at the inner bottom of the cavity 2 and serves as a heating means for heating the supplied cleaning water or rinse water.
Reference numeral 4 denotes a thermistor arranged at the outer bottom of the cavity 2 for measuring the temperature of the wash water or rinse water, 15 denotes a pump arranged at the outer bottom of the cavity 2 and serving as both a water supply means and a drainage means, and 16 denotes a front portion of the bottom of the cavity 2. A pump casing connected to the recess 16; a pump casing 18 connected to the pump 15;
An impeller disposed in 7 is disposed in the center of the inner bottom portion of the cavity 2, a nozzle connected to the pump casing 17, and 20 is disposed in the recess to remove debris floating in the wash water or rinse water. Filter to collect, 2
1 is a door that closes the opening 3 of the cavity 2, 22 is a control unit that controls the operation of the dishwasher / dryer 1, and 25 is a drain pipe that is connected to the pump casing 17 and that has a check valve inside. When the pump 15 is rotated in the normal direction and the impeller 18 is rotated, the cleaning water or the rinse water supplied to the bottom of the cavity 2 is sucked into the pump casing 17 from the recess 16 and sent to the nozzle 19. The nozzle 19 sprays water and applies it to the dishes to wash or rinse and rotate. When the pump 15 is rotated in reverse and the impeller 18 is rotated, washing water or rinsing water is sucked into the pump casing 17 through the recess 16 and drained out of the machine through the drainage pipe 25.

23 is an input device such as a start button and a course selection button, and 24 is a signal from the input device 23.
It is a microcomputer (hereinafter referred to as a microcomputer) that serves as a control unit that sequentially operates loads of the motor 10, the water supply valve 12 and the like over time.

The operation of the above configuration will be described with reference to the flow charts of FIGS. The operation process of the dishwasher / dryer 1 is to wash the dishes by spraying the washing water mixed with the detergent from the nozzle 19 onto the dishes stored in the cavity 2, and to wash the dishes attached to the dishes in the washing process with the nozzle. 1
9. Rinse step of spraying rinse water from 9 and rinse water supplied to the bottom of the cavity 2 is heated by the heater 13 to hot water, and the hot water rinse step of spraying the hot water onto the dishes from the nozzle, air in the cavity 2 Is forcibly sucked into the circulating air passage 7 from the outlet 4 by the double-sided fan 9,
After dehumidifying to dry air, the drying air blown into the cavity 2 from the discharge port 5 is heated by the heater 13, and the dry air is blown onto the dishes to dry.

Of the above steps, the hot water rinsing step will be described below. First, open the water supply valve 12 and open the discharge port 5
From the above, water is supplied into the cavity 2 (S1), and if a predetermined amount is stored, the heater 13 is turned on to heat the supplied wash water (S2). At the same time, the pump 15 is normally rotated to rotate the nozzle 1
Rinse water is sent to 9 and the dishes are rinsed (S3). When a predetermined time has passed (S4), the pump 15 is rotated in the reverse direction (S4).
5) First, perform draining operation for 22 seconds. Seventeen seconds after the drainage operation is started, the water supply valve 12 is opened and water is also supplied at the same time (S6). After a further 5 seconds, the water supply valve 12 and the pump 1
5 is turned off (S7). At this time, the motor 10 is turned on to rotate the double-sided fan 9 to blow air into the cavity 2 (S
8). Two seconds after turning off the pump 15, the water supply valve 1 is restarted.
2 is turned on, the pump 15 is reversed, and the drainage operation is performed (S
9). After 4 seconds, only the water supply valve 12 is closed (S1
0). After a further 2 seconds, the pump 15 is turned off (S1
1). Then, after 4 seconds (S12), the pump 15 is restarted.
Is reversed for 6 seconds (S13) and turned off for 4 seconds (S1
4). After repeating this operation twice (S15), the pump 15 is finally rotated in the reverse direction to perform the draining operation (S16).
After 8 seconds, the operation of the pump 15 is stopped (S17). This completes the hot water rinsing step, and shifts to the next step, the drying step.

The reason why the drainage operation is intermittently performed in this hot water rinsing step will be described below. The rinse water sprayed from the nozzle 19 has water droplets scattered on the side wall of the cavity 2, the top surface, and dishes. For this reason, if the draining operation is continuously performed, the pump 15 causes an air deficiency before the rinsing water is completely collected in the recess 16 and the draining operation becomes impossible. Therefore, the pump 1
5 is temporarily stopped, and the rinsing water is stored in the recess 16 to the extent that the pump 15 does not get air-damped, and then the draining operation is performed.

[0013]

According to the present invention, since the water temperature of the residual water at the bottom of the cavity is lowered before the drying step, it is possible to prevent the evaporation amount of the residual water in the cavity from decreasing and the deterioration of the drying performance.
At the same time, it is possible to prevent dew condensation on the dishes and rewetting after the completion of the drying process.

[Brief description of drawings]

FIG. 1 is a side sectional view of the dishwasher of the present invention.

FIG. 2 is a control block diagram of a control unit.

FIG. 3 is an operation flowchart of the dishwasher.

FIG. 4 is an operation flowchart of a rinsing process.

FIG. 5 is a continuation of the operation flowchart of FIG. 4;

FIG. 6 is a continuation of the operation flowchart of FIG.

[Explanation of symbols]

 2 cavity 9 double-sided fan (blowing means) 12 water supply valve (water supply means) 13 heater (heating means) 15 pump (water supply means and drainage means) 19 nozzle 24 microcomputer (control means)

Front Page Continuation (72) Inventor Kenji Yamane 2-18 Keihan Hondori, Moriguchi Sanyo Electric Co., Ltd. (56) Reference JP-A-63-288122 (JP, A) U) Jikkou Sho 46-29080 (JP, Y2)

Claims (1)

(57) [Claims] And 1. A cavity for containing the dishes, disposed within said cavity, a nozzle for injecting water to the tableware,
A water supply means for supplying water into said cavity, a heating means for heating the water in said cavity, a draining means for draining water in said cavity, and air blowing means for blowing drying air into the cavity, the While outputting a drive signal to each means, washing step, rinsing step, hot water rinsing step,
Dishwashing dry with control means for sequentially performing the drying process
In 燥機, the control means, <br/> in the hot water rinsing stroke, water supply operation of the water supply to rinse water into the cavity,
The rinse water is heated by the heating means, the hot water rinse operation of spraying the rinse water heated by the heating means from the nozzle, and the drainage operation of draining the rinse water in the cavity by the drainage means are sequentially executed. The dishwasher / dryer is characterized in that it also performs a water supply operation of supplying water into the cavity for a predetermined time during the drainage operation .