JPH0536053B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in dishwashers.

(Prior art) Conventionally, in a dishwasher, hot water in a washing hot water tank is sprayed into a washing chamber to wash dishes, and after washing, the same hot water is returned to the washing hot water tank, and then fresh hot water is injected into the washing chamber. is sprayed into the washing chamber to rinse the dishes, after which the hot water is returned to the wash water tank and excess hot water is discharged from the overflow pipe.

(Problem to be Solved by the Invention) However, in such a configuration, in the initial stage of washing the dishes, serious dirt such as residue and oil adhering to the dishes will flow into the washing water tank together with the washing water. , the hot water in the cleaning hot water tank becomes extremely dirty. Therefore, even if washing is continued with such dirty water, the stains on the dishes cannot be completely removed. For example, if you wash a glass with oil after washing dishes with curry on it, the stain on the glass will become worse. Additionally, in the early stages of cleaning as described above, the hot water injected into the cleaning chamber loses its heat to the dishes, lowers its temperature, and flows back into the cleaning hot water tank, causing the overall hot water in the cleaning hot water tank to drop. As a result, a problem arises in that the appropriate temperature necessary for subsequent cleaning cannot be secured.

There is also a desire to use the hot water in the wash water tank as efficiently as possible.

Regarding the above-mentioned matters,
As shown in Japanese Patent No. 11144, it is also possible to adopt a double overflow pipe instead of the above-mentioned overflow pipe. However, in such a case, when the rinsing water is returned to the rinsing water tank, the rinsing water existing at the bottom of the rinsing water tank is pushed upward through the double overflow pipe and externalized as surplus hot water. Although there is a tendency to suppress the temperature drop and staining of the hot water in the washing hot water tank, there is a tendency that the hot water in the washing hot water tank becomes severely dirty and dirty as a result of the initial washing of dishes as described above. This is insufficient to sufficiently prevent the temperature from decreasing.

Therefore, in order to deal with the above-mentioned problems, the present invention has been devised to minimize the staining of the hot water in the washing water tank without causing an unnecessary drop in the temperature of the hot water in the washing water tank in a dishwasher. At the same time, the aim is to make use of the hot spring water without wasting it.

(Means for solving the problem) In order to solve the above problem, in the present invention,
a washing chamber for accommodating dishes; a washing water tank for storing hot water and having an opening protruding downward from a part of a bottom wall of the washing chamber and opening into the washing chamber from a part of the bottom wall; A washing means for pumping hot water from the washing water tank and spraying it into the washing chamber to wash the dishes, and a rinsing means for pumping hot water from a hot water source and spraying it into the washing chamber to rinse the dishes. The feature is that the dishwasher is configured as follows.

That is, the structural feature of the present invention is that the cleaning water tank is disposed on one side of the upper end,
a storage tank having an opening opening upward and accommodating the jet hot water flowing down from the cleaning chamber through the opening; a discharge pipe for discharging hot water to the outside of the wash water tank; and a discharge pipe extending from below in an upright manner through the bottom wall of the storage tank to define a surface level of the wash water in the wash water tank. and an overflow pipe that is located at the inner bottom of the wash water tank and allows the wash water to flow into the storage tank; At a first tilting position where the water is tilted toward the opening of the storage tank, the hot water flowing down from the cleaning chamber is guided down into the opening, and at a second tilting position where the water is tilted toward the lower side of the other side of the cleaning water tank. a tilting plate that guides the jetted hot water flowing down from the cleaning chamber to a portion of the cleaning hot water tank located on the other side; and the tilting plate is moved to the first or second tilting position. The present invention is characterized in that a drive means for driving the switch is provided.

(Function) According to the feature of the present invention, when washing the tableware, the washing means can wash the tableware while the tilting plate is tilted to the first tilting position by the driving means. For example, hot water contaminated during this cleaning, that is, preliminary cleaning, flows down the cleaning chamber together with large residues and is guided by the tilting plate and stored in the storage tank,
The water is further discharged to the outside of the wash water tank through the discharge pipe.

Thereafter, when the tableware is washed by the washing means while the tilting plate is tilted to the second tilting position by the driving means, the hot water contaminated by this washing, that is, the main washing, is removed from small residues. etc., and is guided by the tilting plate and flows back into the washing hot water tank. Then, in this state, when the dishes are rinsed by the rinsing means, the rinsing water is guided by the tilting plate and flows down into the washing water tank. Then, the low-temperature dirty water present at the bottom of the washing water tank flows into the overflow pipe from below due to the flow of the rinsing water as described above, and flows out into the storage box.
The water is then discharged to the outside of the wash water tank through the discharge pipe.

(Effect) In this way, if the tableware is pre-washed at the first tilting position of the tilting plate, all of the hot water contaminated by the pre-washing is guided by the tilting plate, and It will be discharged to the outside through the storage tank and the discharge pipe. the result,
Even dirty preliminary washing water does not contaminate the hot water in the washing water tank. In addition, the dirty hot water from the preliminary washing loses heat to the dishes and becomes lower in temperature, but as mentioned above, this dirty hot water is reliably separated from the remaining hot water in the washing water tank and discharged to the outside. .
Therefore, it is possible to prevent the temperature of the remaining hot water in the washing hot water tank from decreasing.

Further, as described above, if the main washing of the tableware is performed while the tilting plate is tilted to the second tilting position, the dirty hot water from the main washing is guided by the tilting plate and The water will constantly flow back into the wash water tank. As a result, the hot water at the initial stage of the main cleaning is not wasted and discharged through the storage tank, and an appropriate amount of hot water required for the main cleaning can always be maintained in the washing hot water tank. Furthermore, since the dirty hot water from the main washing is cleaner than the dirty water from the preliminary washing, even if it flows back into the washing water tank, it will not contaminate the hot water in the tank to a lesser degree.

After that, by rinsing the dishes as described above, as the rinsing water flows into the washing water tank, the cooled dirty water at the bottom of the washing water tank flows through the overflow pipe as described above. Since the hot water is discharged through the storage tank and the discharge pipe, the hot water in the wash water tank can be maintained at a high temperature and clean even by adding rinsing water to it. This means that washing water suitable for subsequent washing can always be secured.

Another advantage is that the above-mentioned effects can be achieved by vertically tilting the tilting plate while the storage tank is disposed within a single wash water tank.

Further, in the present invention, a tank filter is provided, which is removably received in the opening of the washing hot water tank above the tilting plate and allows the jet hot water flowing down from the washing chamber to flow down through a filter part, and the storage tank. a guide plate extending downward from the tank filter from the side wall of the washing hot water tank directly above the tank filter and guiding the hot water flowing down from the tank filter toward the tilting plate; During the above-mentioned preliminary cleaning or main cleaning, dirt such as residue contained in the hot water flowing down from the cleaning chamber remains on the tank filter, and after that, the dirty hot water flowing down from the tank filter reaches the guide plate. It will be guided toward the tilting plate. In this case, since the tank filter is located at a position where it can be easily seen through the cleaning chamber, maintenance necessary for proper cleaning of the tank filter can be easily performed. Moreover, the dirty water from the tank filter can be reliably guided toward the tilting plate by the guide plate. Therefore, the effects associated with the above-mentioned preliminary cleaning and main cleaning can be further improved.

(Embodiment) An embodiment of the present invention will be described below with reference to drawings. Fig. 2 shows the overall structure of a commercial dishwasher, and Fig. 1 shows an embodiment of the present invention applied to the same dishwasher. Shows the main parts. The dishwasher is in washing room 10.
In the washing chamber 10, a pair of upper and lower washing nozzles 11a, 11b and a pair of upper and lower rinsing nozzles 12a, 12b are supported facing a rack 13 on which tableware 14 is placed. Further, on the left side of the bottom wall of the cleaning chamber 10 in FIG. 1, a cleaning hot water tank 20 is provided with an opening 21 opening into the cleaning chamber 10 and protruding downward.

The cleaning pump 30 is driven by a cleaning motor 30a (see FIG. 8) to draw in cleaning hot water from the cleaning hot water tank 20 through an inlet 31 and inject it into both cleaning nozzles 11a and 11b through a pipe P1. to pump. The rinse pump 40 is connected to the rinse motor 4
0a (see FIG. 8) to supply hot water to a predetermined temperature (for example,
Hot water at a temperature of 65°C or 85°C is sucked in and forced to be injected into both rinsing nozzles 12a and 12b through a pipe P3. The gas booster 50 receives hot water from the hot water supply source 60 through the hot water supply valve 70 and the piping P4, and heats and maintains the hot water at 65°C or 85°C.

Next, the configuration inside the wash water tank 20 will be described. The pump filter 80 is arranged in the wash water tank 20, as shown in FIG. 1 and FIGS. 3 to 5. The pump filter 80 is composed of a substantially box-shaped filter body 80a and handles 80b extending in an inverted U shape from the upper ends of both side walls of the filter body 80a. Each flange portion 81, 82 (third
(see reference), one side wall 22 of the cleaning water tank 20
Each crank-shaped metal fitting 22 is fixed vertically along the
a, 22b from above in a removable manner, and its opening 83 faces the suction port 31 of the cleaning pump 30. Further, a large number of punch holes 84 to 84 forming the filter portion are bored in the upper part of the front wall of the filter main body 80a so as to face the suction port 31.

The band-shaped support plate 90 is fixed at its base 91 horizontally along the other side wall 23 of the wash water tank 20 within the opening 21 of the wash water tank 20, as shown in FIGS. 3 to 5. As shown in FIGS. 4 and 5, this support plate 90 is
A gutter 93 having a U-shaped cross section opens upward together with the other side wall 23 of the wash water tank 20 at an upwardly extending portion 92 that extends upwardly from the base 91 in a crank shape.
form. The band-shaped guide plate 100 is horizontally attached at its bent base 101 along the rising portion 92a of the upwardly extending portion 92 of the support plate 90 by tightening a plurality of screws 101a.
00, the inclined portion 102 extends gently downward from the base 101 toward the center between both sides of the opening 21 of the cleaning hot water tank 20.

Each box-shaped tank filter 110, 110, 1
As shown in FIGS. 1 and 2 to 5, 10 has flange portions 111 and 112 on both sides,
The mesh filter portion 11a formed at the center of the bottom wall of each tank filter 110 is placed on the base 101 of the guide plate 100 and the upper end of one side wall 22 of the cleaning water tank 20, respectively. It faces into the opening 21.

The band-shaped tilting plate 120 is shown in FIGS. 1 and 3 to 5.
As shown in the figure, it is located at the center between both side walls 22 and 23 of the wash water tank 20 directly below the tank filter 110 and extends in the front-rear direction. 4 and 5), the cleaning water tank 20 is rotatably pivoted vertically on the rear wall 24 of the cleaning water tank 20. It is rotatably supported in the front wall 25 of the cleaning hot water tank 20 by a rotation shaft 123 that protrudes in the vertical direction. Accordingly, this tilting plate 120 moves to the first tilting position (as shown in FIGS. 4 and 5) in the same direction in response to the rotation of the rotation shaft 123 in the counterclockwise direction shown in FIGS. 4 and 5. tilt to the position shown by the two-dot chain line in the illustration),
Filter section 110 of each tank filter 110
The hot water flowing down from the cleaning chamber 10 through a is received directly or via the guide plate 100, and is guided into a storage tank 130, which will be described later, to flow down. In addition, this tilting plate 120 tilts in the same direction to a second tilting position (the position indicated by the solid line in FIGS. 4 and 5) in accordance with the rotation of the rotation shaft 123 in the clockwise direction in the figure,
The hot water flowing down from the cleaning chamber 10 through the filter portion 110a of each tank filter 110 is received directly or via the guide plate 110, and is allowed to flow down to the pump filter 80 side in the cleaning hot water tank 20.

However, the left side portion 124 of the tilting plate 120 shown in FIGS. 4 and 5 is the center portion 125 of the tilting plate 120.
The left side portion 124 extends upward in a gently inclined manner, and the tip portion of the left side portion 124 is bent downward in an L-shape. Therefore, when the tilting plate 120 is in the second tilting position, the left side portion 125 is connected to the tilting portion 120 of the guide plate 100 and the tilting portion 120 at both bent portions as shown in FIGS. The center portion 125 of the tilting plate 120 abuts from below the tip bent portions 103 that are bent in a hanging shape from the bottom.
It is designed to prevent the hot water from flowing backwards upwards. Further, in order to reliably guide the hot water flowing down from each filter section 110a into the storage tank 140 when the tilting plate 120 is in the second tilting position, the right side 126 of the tilting plate 120 is connected to the flange section of each tank filter 110. It extends to just below 112. In addition, in FIG. 3, the reference numeral 123a
indicates an annular collar.

As shown in FIGS. 4 to 6, the storage tank 130 is formed in a rectangular parallelepiped shape, and extends upward from one side wall 131 of the left side 124 of the guide plate 100 and the tilting plate 120 in an L-shape. The extending support portion 131a allows the other side wall 23 of the cleaning hot water tank 20 to be attached to the downward extending portion 94 extending downward in an L-shape from the base 91 of the support plate 90 even when the plurality of screws 94a are tightened. The upper end opening 132 of this storage tank 130 is supported horizontally along the tilting plate 1.
It opens from below toward the left side 124 of 20.

The front part of the bottom wall 133 of the storage tank 130 (the sixth
(see figure), a discharge pipe 134 is fitted at its upper end and opens into the storage tank 130.
This discharge pipe 134 allows the hot water in the storage tank 130 to flow down to be discharged. The lower end of the discharge pipe 140 is fitted into a part of the bottom wall 26 of the cleaning hot water tank 20 and opens to the outside of the bottom wall 26. The discharge tube 134 extends upward from the discharge tube 134 and coaxially faces the lower end of the discharge tube 134 with a gap therebetween. The cylindrical coupling 150 is made of a rubber material.
is removably fitted concentrically to both the lower end of the discharge pipe 134 and the upper end of the discharge pipe 140 from the outside, and has the role of discharging hot water in the storage tank 130 through the discharge pipe 134 and the discharge fitting 40. Fulfill. However, the lower end portion 151 of the coupling ring 150 is formed in a shape that widens toward the end so that the upper end portion of the discharge pipe 140 can be easily inserted into the lower end portion 151 from below. The overflow pipe 160 is fitted at its intermediate portion to the rear part (see FIG. 6) of the bottom wall 133 of the storage tank 130, and the upper end 161 of the overflow pipe 160 extends from the bottom wall 133. The overflow pipe 160 extends upward to a predetermined height and opens into the storage tank 130, while the lower end 162 of this overflow pipe 160 is connected to the bottom wall 26 of the washing hot water tank 20 in a predetermined position to allow hot water near the bottom wall 26 of the wash water tank 20 to flow therein. They face each other at intervals and are open inside the wash hot water tank 20.

The drive mechanism 170 for the tilting plate 120 is a third
As shown in FIG. 7 and FIG. 7, it is assembled at the vertically intermediate portion of the front wall 25 of the cleaning hot water tank 20 and at the front end intermediate portion of the one side wall 22. Drive mechanism 170
has a linear actuator 171,
This linear actuator 171 has a plurality of screws 171a to 171a on a bracket 172 fixed to an intermediate portion of the front end of one side wall 22 of the cleaning water tank 20.
It is attached by tightening 71a. This linear actuator 171 maintains the actuator rod 171c at the position shown in FIG. 7 under the demagnetization of its built-in solenoid 171b (see FIG. 8), and also responds to the excitation of the solenoid 171b. The actuator rod 171c is sucked to the right in FIG. 7.

The link lever 173 is connected to this bifurcated base end 1.
At 73a, the pin 171 is attached to the fork-shaped connecting portion 171d fixed to the tip of the actuator rod 171c.
The link lever 173 is bent in a crank shape toward the front wall 25 of the wash water tank 20 and rotates along the front wall 25 along the rotation axis 1.
23, and its tip 173b is engaged with the tip 174a of the coil spring 174. This coil spring 174 has an L fixed to a part of the front end 25 at its base end 174b.
The link lever 173 is latched to the tip of the letter-shaped bracket 175 and pulled to the left in FIGS. 3 and 7. This means that link lever 1
73 moves to the right against the coil spring 174 in response to the right movement of the actuator rod 171c of the linear actuator 171, and under the action of the coil spring 174 in response to the right movement of the actuator rod 174c. It means to move to the left.

The rotary lever 176 has an annular boss portion 176a formed at its upper end, and a key 123b is attached to the outer end of the rotary shaft 123 of the tilting plate 120 that protrudes outward through the front wall 25 of the wash water tank 20. The lower end of the rotary lever 176 is rotatably fitted to the tip of the connecting lever 173 by a pin 176c, and the lower end of the rotary lever 176 is rotatably fitted to the tip of the connecting lever 173 by a pin 176c. , is prevented from coming off by a circlip 176d. However,
The rotating lever 176 rotates in the same direction in response to the rightward movement of the link lever 173 to tilt the tilting plate 120 to the first tilting position, and rotates in the same direction in response to the leftward movement of the link lever 173 to tilt the tilting plate 120 to the first tilting position. It is tilted to the second tilting position (the position indicated by the broken line in FIG. 7).

Next, see Part 8 about the electrical circuit configuration of a dishwasher.
To explain with reference to the figure, the power switch 180a
generates a power-on signal when turned on.
The door switch 180b closes and generates a close signal only when the door of the cleaning chamber 10 is closed. The water level detection switch 180c detects when the hot water in the wash water tank 20 is full and generates a water level detection signal. The microcomputer 190 is the ninth
According to the flowchart shown in the figure, open the door switch 1.
80b and the water level detection switch 180c, the computer program is executed, and during this execution, the washing motor 30a and the rinsing motor 4
0a, gas booster 50 and solenoid 171b
Each drive circuit 190a to 190 respectively connected to
Performs calculation processing necessary for drive control of d. However, the above computer program is stored in the ROM of the microcomputer 190 in advance. Note that the microcomputer 190 starts executing the computer program in response to a power-on signal from the power switch 180a.

In this embodiment configured as described above, when a power-on signal is generated from the power switch 180a, the microcomputer 190 starts executing the computer program at step 200 according to the flowchart of FIG. At step 210, initialization processing is performed and the computer program proceeds to initial hot water supply processing routine 220. In this initial hot water supply processing routine 220, the microcomputer 190 drives the gas booth 50 via the drive circuit 190c.
Keep the hot water inside heated to about 65℃.

Next, the microcomputer 190 drives the rinse motor 40a via the drive circuit 190b, and the rinse pump 40 passes the hot water from the gas booster 50 through each pipe P2, P3 to the rinse nozzle 12.
A, 12b are injected into the cleaning chamber 10. The hot water injected in the cleaning chamber 10 passes through each tank filter 110.
The hot water flows down into the cleaning hot water tank 20 while being guided by the guide plate 100 and the tilting plate 120 . After that,
When a water level detection signal is generated from the water level detection switch 180c, the microcomputer 190 stops the rinse motor 40a via the drive circuit 190b. This causes the rinse pump 40 to stop.
Note that after this stop, the microcomputer 190
drives the gas booster 50 via the drive circuit 190c to heat and maintain the hot water in the gas booster 50 at approximately 85°C.

In this state, if the door of the washing chamber 10 is closed when each tableware 14 is placed on the rack 13, the microcomputer 190 responds to the closing signal from the door switch 180b in step 230. It is determined as “YES”, and in step 231,
Reset and start the built-in timer. Therefore, the timer starts counting at the same time as it is reset. Next, the microcomputer 190
However, in step 232, a tilting signal for tilting the tilting plate 120 to the first tilting position is generated, and in step 240, since the time value of the timer is less than the first predetermined time, it is determined as "NO". do. However, the above-mentioned first predetermined time corresponds to the time required to complete the tilting of the tilting plate 120 from the second tilting position to the first tilting position, and is stored in advance in the ROM of the microcomputer 190.

When a tilting signal is generated from the microcomputer 190 as described above, the linear actuator 171 attracts the drive circuit 171c with its solenoid 171b, and the link lever 173 moves to the right against the coil spring 174. The rotating lever 176 rotates in the same direction, and the tilting plate 120 tilts from the second tilting position to the first tilting position. When the determination in step 240 becomes "YES", the microcomputer 190 resets and starts the timer in step 241 based on the determination that the tilting of the tilting plate 120 to the first tilting position is completed.
At step 242, a cleaning motor drive signal for driving the cleaning motor 30a is generated, and at step 250
At step 241, the timer value reset and started is less than the pre-cleaning time.
Determine “NO”. However, this preliminary cleaning time is
It is set to the minimum necessary time that can initially remove heavy dirt and large adhesion residues from each tableware 14, and is stored in advance in the ROM of the microcomputer 190.

When the cleaning motor drive signal is generated from the microcomputer 190 as described above, the cleaning motor 30
a is driven by a drive circuit 190a, the cleaning pump 30 sucks hot water in the cleaning hot water tank 20 through the pump filter 80 from the suction port 31, and pumps it to each cleaning nozzle 11a, 11b through the piping P1.
Then, each cleaning nozzle 11a, 11b connects to the pipe P1.
Preliminary washing of each tableware 14 is started by spraying hot water. As a result of this pre-washing, each tableware 14
The hot water that has removed the dirt flows down inside the cleaning chamber 10 and reaches each tank filter 110.

However, the tilting plate 120 has surely tilted from the second tilting position to the first tilting position before the determination "YES" is made in step 240 as described above.
Therefore, when pre-cleaning is started as described above after determining "YES" in step 240, the dirty water that has reached each tank filter 110 as described above passes through each filter section 110a and goes directly to the tilting plate. 120 or flow down onto the tilting plate 120 while being guided by the guide plate 100, and being reliably accommodated in the storage tank 130 through its opening 132 without flowing back into the cleaning water tank 20.
Then, it passes through the discharge pipe 134 and the discharge pipe 140 and is discharged to the outside. Therefore, even if it takes time for the tilting plate 120 to tilt to the first tilting position, the tilting plate 1
20 is surely tilted to the first tilting position and the preliminary cleaning is performed as described above, the dirty hot water resulting from this preliminary cleaning can be reliably discharged to the outside, and as a result, the residual hot water in the cleaning hot water tank 20 can be removed. , it can be kept clean at all times without causing a drop in temperature. In addition,
Residues and the like that flow down with the dirty water from preliminary washing remain on each tank filter 110. Further, since the upper end 161 of the overflow pipe 160 is at an appropriate height within the storage tank 130, hot water after preliminary cleaning of the storage tank 130 does not flow down into the overflow pipe 160.

In this state, if the determination in step 250 becomes "YES", the microcomputer 190 terminates the above-mentioned preliminary cleaning in step 251 by stopping the cleaning pump 30 due to the disappearance of the cleaning motor drive signal. Then, in step 252,
Lasts until the end of the downtime. Since the tilting plate 120 is in the first tilting position, if the pause time is appropriately determined, each tank filter 110 can be moved from the cleaning chamber 10 to the tank filter 110 after the cleaning pump 30 has stopped.
All the dirty hot water flowing down is stored in the storage tank 130 via the tilting plate 120, and is discharged from the discharge pipe 14.
Since the residual hot water in the cleaning hot water tank 20 is discharged through 0 water, the residual hot water in the cleaning hot water tank 20 will not be contaminated by mixing with the preliminary cleaning hot water.

After the time has expired in step 252, the microcomputer 190 causes the tilting signal to disappear in step 253, resets and starts the timer in step 254, and in step 260 sets the time value of this timer to the first value. 2. Because it is less than the specified time,
Determine “NO”. However, this second predetermined time is
This corresponds to the time required for tilting the tilting plate 120 from the first tilting position to the second tilting position, and is stored in advance in the ROM of the microcomputer 190. Therefore, as mentioned above, the microcomputer 190
When the tilting signal from the linear actuator 171 disappears, the linear actuator 171 is demagnetized by the drive circuit 190d at its solenoid 171b, releasing the attraction of the actuator rod 171c, and the link lever 173
moves to the left in response to the action of the coil spring 174,
The rotation lever 176 rotates in the same direction, and the tilting plate 1
20 is tilted from a first tilted position to a second tilted position.

When the determination in step 260 becomes "YES", the microcomputer 190 determines that the tilting of the tilting plate 120 to the second tilting position is completed.
However, in step 261, the timer is reset and started, and in step 262, a cleaning motor drive signal is generated.In step 270, since the timer value is less than the main cleaning time, it is determined as "NO". do. However, this main washing time is set by the microcomputer 190 as a time that can sufficiently wash the tableware 14.
is stored in advance in the ROM. In addition, in response to a cleaning motor drive signal from the microcomputer 190, the cleaning pump 30 sucks hot water from the cleaning hot water tank 20 (assuming that sufficient hot water remains) in the same way as described above, and pumps the hot water into the piping P1. This means that the cleaning of each tableware 14 has started from each cleaning nozzle 11a, 11b toward each tableware 14 through the cleaning nozzle 11a, 11b. With the start of this main washing, the hot water that has removed the dirt from each tableware 14 flows down inside the washing chamber 10 and reaches each tank filter 110.

However, the tilting plate 120 has surely tilted from the first tilting position to the second tilting position before the determination "YES" is made in step 260 as described above.
Therefore, when the main cleaning is started as described above after determining "YES" in step 260, the dirty hot water that has reached the main cleaning as described above is transferred to each filter section 11.
0a and directly onto the tilting plate 120, or
Alternatively, the tilting plate 12 is guided by the guide plate 100.
0, and is reliably refluxed into the wash water tank 20 without being stored in the storage tank 130. Therefore, even if it takes time for the tilting plate 120 to tilt to the second tilting position, the main cleaning is performed as described above after the tilting plate 120 reliably tilts to the second tilting position. All of the reflux water can be returned into the wash water tank 20. the result,
The hot water in the cleaning tank 20 does not decrease wastefully. Note that even during this main cleaning, the residue of dirty water that reaches each tank filter 110 remains on each filter portion 110a.

After that, the determination in step 270 is "YES".
When this happens, the microcomputer 190 determines that the main cleaning has ended, and in step 271, the cleaning pump 30 is stopped by the disappearance of the cleaning motor drive signal, and in step 272, the microcomputer 190 stops the cleaning pump 30 until the pause time elapses. The computer program then proceeds to a rinse processing routine 280. In this rinsing processing routine 280, the microcomputer 190 controls the drive circuit 190b during the rinsing time.
, the rinse motor 40a is driven, and accordingly the rinse pump 40 is heated to 85° C.
Each tableware 14 is rinsed by inhaling hot water and spraying it from each rinsing nozzle 12a, 12b through both pipes P2, P3.

The hot water flowing down in the cleaning chamber 10 after rinsing passes through each tank filter 110 and is guided by the tilting plate 120 as described above to the cleaning hot water tank 20.
flow down inside. Then, the low-temperature hot water existing in the vicinity of the bottom wall 26 in the wash water tank 20 is sent into the overflow pipe 160 from its lower end for the high-temperature hot water that flows down into the wash water tank 20 after rinsing as described above. The liquid rises and flows out from the upper end into the storage tank 130, and then is discharged to the outside through the discharge pipe 134 and the discharge pipe 140. For this reason,
Even if the temperature of the hot water in the cleaning hot water tank 20 drops and the hot water is dirty, the hot water in the cleaning hot water tank 20 will flow down into the cleaning hot water tank 20 after rinsing due to the function of the overflow pipe 160. It will be maintained in a clean condition at an appropriate temperature. In other words, the overflow pipe 160 is connected to the storage tank 130.
By providing this, the overflow of hot water in the wash water tank 20 can be discharged without employing an independent overflow pipe as in the conventional case, and the space in the wash water tank 20 can be used effectively.

In addition, in each of the main cleaning and rinsing processes as described above, the left side portion 124 of the tilting plate 120 is connected to the tilting portion 102 of the guide plate 100 on both sides, as shown in FIGS. Since both of the tip bent portions 103 are in contact with each other from below, the hot water that has flowed down onto the tilting plate 120 will not flow down beyond the left side portion 124 into the storage tank 130 . Furthermore, each tank filter 110 is located at a position where it can be easily recognized by visually inspecting the interior of the cleaning chamber 10.
Maintenance such as cleaning of each of these tank filters 110 is easy. Furthermore, since each tank filter 110 is located above the tilting plate 120 at the opening 21 of the wash water tank 20, the total surface area of these tank filters 110 is
The opening area can be increased up to 1.

In addition, since the gutter 93 is provided above the storage tank 130 between the guide plate 100 and the other side wall 23 of the cleaning hot water tank 20, the hot water flowing down inside the cleaning chamber 10 during the main cleaning is directed to the other side wall. 23 into the storage tank 130, it stays in the gutter 93 and flows into each tank filter 110 from above. Therefore, hot water during the main cleaning will not be wastefully discharged from the storage tank 130. In addition, since the upper end 161 of the overflow pipe 160 in the storage tank 130 is higher than the bottom wall 133 by a predetermined height, the cleaning hot water tank 20
The surface level of the hot water after rinsing inside is also high. Therefore, even if the area of the cleaning hot water tank 20 is reduced, an appropriate amount of hot water can be ensured.

In addition, since the discharge pipe 140 and the discharge tube 134 are removably fitted with a coupling 150, the storage tank 130 can be easily taken out from the cleaning hot water tank 20, and as a result, the storage tank 130 and the overflow pipe 160 can be easily removed. maintenance becomes easier. In addition, each tank filter 110 is positioned above the tilting plate 120, and the overflow pipe 160 is connected to the storage tank 130.
pump filter 8.
0 can be removably placed in the wash water tank 20, and maintenance of the pump filter 80 has also become easier. In addition, step 90
If the determination in step 230 becomes ``YES'' due to the disappearance of the closing signal from door switch 180b, the computer program returns to step 230.

Note that in carrying out the present invention, the following steps are required:
252 (see Figure 9) and step
The second predetermined time at step 260 is the time required for the tilting plate 120 to tilt from the first tilting position to the second tilting position, and after the cleaning motor drive signal disappears at step 251, all of the preliminary cleaning hot water is stored in the storage tank 130. By setting the time corresponding to the longer time required for cleaning, it is possible to advance the start time of the main cleaning after the preliminary cleaning and prevent wasteful discharge of the cleaning hot water through the storage tank 130 as in the previous embodiment.

Further, in carrying out the present invention, the present invention is not limited to commercial dishwashers, but may be applied to domestic dishwashers.

In addition, in carrying out the present invention, there are steps to be taken.
At 242, a rinse motor drive signal is generated instead of the wash motor drive signal, and the rinse motor 40
a. Preliminary washing may be carried out by injecting hot water from each of the rinsing nozzles 12a and 12b under the operation of the rinsing pump 40.

Furthermore, in carrying out the present invention, each tank filter 110 is omitted, the first tank filter is disposed inside the accommodation tank 130, and the second tank filter is disposed in the right moving part 126 of the tilting plate 120. The hot water flowing down from the tilting plate 120 in the first tilting position is stored in the storage tank 130 through the first tank filter. Even if the hot water flowing down from the tilting plate 120 located at Similar effects can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the interior of the washing chamber of a dishwasher to which the present invention is applied, Fig. 2 is an overall configuration diagram of the main body of the dishwasher, Fig. 3 is a partially cutaway plan view of the washing water tank, and Fig. 4 is a sectional view taken along line 5-5 in Fig. 3,
Figure 5 is a cross-sectional view taken along line 6-6 in Figure 3;
The figures are a sectional view taken along line 7-7 in Figure 3, Figure 7 is a front view of the drive mechanism, Figure 8 is an electrical circuit diagram of the dishwasher, and Figure 9 is the microcomputer shown in Figure 8. This is a flowchart showing the effect of Explanation of symbols, 10...Cleaning room, 11a, 11b
... Washing nozzle, 12a, 12b ... Rinse nozzle, 14 ... Tableware, 20 ... Washing water tank, 21
. . . Opening, 30 . . . Cleaning pump, 30a . . . Washing motor, 40 . Tank filter, 110a...Filter part, 120...Tilt plate, 130...Accommodating tank, 134...Discharge tube, 140...Discharge pipe, 150...Couple ring, 170...Drive mechanism, 171...Solenoid, P1 ~P4...Piping.

Claims (1)

[Scope of Claims] 1. A washing chamber for accommodating tableware, and an opening projecting downward from a part of the bottom wall of the washing chamber and opening into the washing chamber from a part of the bottom wall, and having a hot water supply. a washing hot water tank for storing hot water; a washing means for pumping hot water in the washing water tank and spraying it into the washing chamber to wash the dishes; and a washing means for pumping hot water from a hot water source and spraying it into the washing chamber to wash the dishes in a dishwasher equipped with a rinsing means, disposed at one side of the upper end of the washing water tank,
a storage tank having an opening opening upward and accommodating the jet hot water flowing down from the cleaning chamber through the opening; a discharge pipe for discharging hot water to the outside of the wash water tank; and a discharge pipe extending from below in an upright manner through the bottom wall of the storage tank to define a surface level of the wash water in the wash water tank. and an overflow pipe that is located at the inner bottom of the wash water tank and allows the wash water to flow into the storage tank; At a first tilting position where the water is tilted toward the opening of the storage tank, the hot water flowing down from the cleaning chamber is guided down into the opening, and a second tilting where the hot water is tilted toward the other side of the water tank. a tilting plate that guides the jetted hot water flowing down from the cleaning chamber to a portion located below the other side of the cleaning hot water tank at a position; and the tilting plate is moved to the first or second tilting position. A dishwasher characterized in that it is provided with a drive means that drives the dishwasher so as to switch the dishwasher. 2. A tank filter that is removably received in the opening of the washing hot water tank above the tilting plate and allows the jet hot water flowing down from the washing chamber to flow down through the filter section; Claims characterized in that a guide plate is provided that extends from a side wall of the wash hot water tank toward below the tank filter and guides hot water flowing down from the tank filter toward the tilting plate. The dishwasher according to paragraph 1.