JP2660350B2 - Dishwasher - Google Patents

Description

The present invention relates to an improvement in a dishwasher.

(Prior art) Conventionally, in a dishwasher for business use, hot water in a washing hot water tank is sprayed into a washing room to wash dishes.
After this washing, the hot water is returned to the washing hot water tank, and then fresh hot water is injected into the washing room to rinse the dishes, and then the hot water is returned to the washing hot water tank to remove excess hot water. It is designed to be discharged from the overflow pipe. Also,
In a household dishwasher, hot water in a washing water tank is injected into a washing room to wash dishes, and after this washing, hot water flowing back into the washing water tank is discharged to the outside, and then fresh hot water is discharged. The tableware is sprayed into the cleaning chamber via the cleaning water tank to rinse the tableware, and then is returned to the cleaning water tank.

(Problems to be Solved by the Invention) However, in these configurations, in the case of a commercial dishwasher, in the early stage of washing the dishes, terrible dirt such as residue and oil adhered to the dishes and the washing water tank together with the washing water. The hot water in the cleaning hot water tank is seriously contaminated because the hot water flows into the cleaning water tank. Therefore, even if the subsequent washing is continued with such dirty water, there is a problem that the stains on the tableware cannot be removed cleanly. For example, if the glass is washed with hot water after washing the dishes to which the curry has adhered, the stain on the glass becomes worse. Also, in the initial stage of washing as described above, the hot water injected into the washing chamber is deprived of heat by the dishes and cooled to a low temperature and returned to the washing hot water tank, so that the temperature of the entire hot water in the washing hot water tank decreases. As a result, there arises a problem that an appropriate hot water temperature required for the subsequent cleaning cannot be secured.

In the case of a household dishwasher, even though the problem of the contamination of the hot water in the cleaning water tank as described above is reduced,
As in the case of the commercial dishwasher, the temperature of the entire hot water in the cleaning hot water tank was lowered, and as a result, an appropriate hot water temperature required for cleaning could not be secured as described above.

Therefore, the present invention, in order to deal with the above,
In a dishwasher, it is intended to minimize the contamination of the hot water in the cleaning hot water tank without lowering the temperature thereof.

(Means for Solving the Problems) In solving the problems, the structural features of the present invention include a cleaning chamber, and a part of the bottom wall of the cleaning chamber which projects downward from a part of the bottom wall of the cleaning chamber. And a washing water tank having an opening that opens into the washing chamber.
An auxiliary chamber having an opening supported in the opening of the cleaning water tank and opening into the cleaning chamber through a part of the opening is provided, and the inside of the auxiliary chamber is formed on the bottom wall of the cleaning water tank or A selective closing mechanism that communicates with the outside through the peripheral wall and selectively closes the opening of the auxiliary chamber and the remaining portion of the opening of the cleaning water tank except for a portion corresponding thereto is provided. The opening of the auxiliary chamber is opened by the selective closing mechanism at the time of initial cleaning in the initial stage of cleaning, and the opening of the auxiliary chamber is closed by the selective closing mechanism at the time of main cleaning after the initial cleaning. That's why.

(Effects of the Invention) By configuring the present invention as described above, in the initial stage of washing the dishes, the initial washing is performed in a state where the opening of the auxiliary chamber is opened by the selective closing mechanism, and the dishes are washed. Terrible dirt such as attached residue, juice, oil, etc., flows into the auxiliary chamber together with the hot water that has washed the dishes, and large ones of the inflowed residues remain in the auxiliary chamber, and small ones, juices, and oils of the residue are removed. It is discharged to the outside together with the cleaning water. After the initial cleaning, the main cleaning is performed in a state where the opening of the auxiliary chamber is closed by the selective closing mechanism. Reflux from the remaining portion of the section into the wash water tank.

For this reason, the hot water in the cleaning hot water tank is reliably separated from the contaminated hot water at the time of the initial cleaning as described above, and as a result, the hot water in the cleaning hot water tank is kept clean, and the subsequent smooth operation is performed. Maintain high washing quality while maintaining good washing. In addition, as described above, the hot water used for washing in the early stage of washing is deprived of heat by the dishes to lower the temperature, but the cooled water is discharged outside and mixed with the hot water in the washing hot water tank. There is no. Therefore, the temperature of the hot water in the cleaning water tank can be maintained at an appropriate temperature required for subsequent cleaning without lowering the temperature.

Further, in the present invention, the tableware is initially washed while the opening of the auxiliary chamber is opened by the selective closing mechanism, and the opening of the auxiliary chamber is closed by the selective closing mechanism. Since it is possible to shift to the main washing of the tableware by closing, the transition from the initial washing to the main washing can be performed in a very short time, and the entire washing time does not become long. . Further, at the time of transition from the initial cleaning to the main cleaning, there is no need to discharge the hot water in the cleaning hot water tank, so that there is no wasteful consumption of hot water and electric power, and an economic effect can be expected.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows the entire configuration of a commercial dishwasher, and FIG. 1 shows the present invention applied to the dishwasher. The main part is shown. The dishwasher is provided with a washing room 10, and this washing room 10
Inside, a pair of upper and lower washing nozzles 11a and 11b and a pair of upper and lower rinsing nozzles 12a and 12b are supported to face the rack 13 on which the tableware 14 is placed. The second wall of the bottom wall of the cleaning chamber 10
In the left part of the drawing, the cleaning water tank 20 has an opening 21
Is opened in the cleaning chamber 10 and protruded downward.

An overflow pipe 22 extends vertically upward from the bottom wall of the washing hot water tank 20 at the left side in FIG. 1 of the washing hot water tank 20, and a lower end portion 22a of the overflow pipe 22 is shown in FIG. As shown in the figure, it opens outward through the bottom wall of the washing water tank 20. Inside the opening 21 of the washing water tank 20, a partition body
23 is formed of a plate material so as to have the cross-sectional shape shown in FIG. 1, and at the left and right centers of the front and rear inner walls shown in FIG. Only the rear wall 23a is shown in FIG. 1), and is supported horizontally and longitudinally obliquely above and to the right of the upper end opening 22b of the overflow pipe 22 in the drawing. The partition plate 24 is disposed on the left side of the partition body 23 in the opening 21 of the cleaning hot water tank 20 at its L
The F-shaped flange portion 24a is fixed to the left wall of the cleaning water tank 20 and its right portion 24b is fixed to the left flange portion 23b of the partition 23.
A discharge pipe 24c is suspended and protruded from the center of the partition 24 in the left and right direction as shown in FIG. 22 extends into the upper end opening 22b. In such a case, the outer diameter of the discharge pipe 24c is set smaller than the inner diameter of the overflow pipe 22.

The separation box 25 is mounted on a partition plate 24. The separation box 25 includes a box 25a and a mesh filter 25b formed so as to protrude downward from the bottom wall of the box 25a in a U-shaped cross section. And is constituted by. At the center in the front-rear direction of the box 25a, a narrow width gripping member 25c is bent in a U-shape, and both arms are fixedly attached to the left and right inner walls of the box 25a. However, the upper end of the box 25a is slightly lower than the upper left end of the partition 23. The filter 25b is mounted on the partition plate 24. The filter 25b partitions the inside of the box 25a from the inside of the discharge pipe 24c. On the other hand, the separation box 26 is fixed at a position symmetrical to the separation box 25 with respect to the partition 23, and the left side thereof is fixed on the right flange 23c of the partition 23 and the right side of the cleaning hot water tank 20. It is fixed to the right wall via an L-shaped bracket 26a and supported horizontally, and a mesh filter 26b is provided on the bottom wall of the separation box 26.

Directly above the separation box 25, a guide plate 27 is provided at its base end,
L fixed to the left inner wall of the opening 21 of the washing water tank 20
The guide plate 27 is supported by a hinge 27b so as to be tiltable up and down in a vertical direction. It is detachably screwed to the rear wall. In such a case, the guide plate 27 extends so as to entirely cover the opening of the separation box 25 from above, and the distal end of the guide plate 27 is slightly larger than the left end of the mountain-shaped upper wall 23d of the partition 23. In FIG. 1, it is located right above in the figure.

On the other hand, just above the separation box 26, a guide plate 28 is tilted upward at a base end thereof by a hinge 28b to an L-shaped bracket 28a fixed to the right inner wall portion of the opening 21 of the washing water tank 20. The guide plate 28 extends obliquely downward just above the partition wall 23 and is detachably screwed to the rear wall of the washing water tank 20 by a flange 28c.
In such a case, the guide plate 28 extends so as to entirely cover the opening of the separation box 26 from above, and the front end of the guide plate 28 is slightly more than the right end of the upper wall 23d of the partition 23. In FIG. 1, it is located immediately above and to the left of the drawing, and opposes the distal end portion of the guide plate 27 with an interval.

Between the upper wall 23d of the partition wall 23 and each end of the guide plates 27, 28, an L-shaped switching plate 29 extends in the front-rear direction in FIG. 1 and is fixed to the rear end. The pivot plate 31 is pivotally supported by a pivot shaft 31 (see FIGS. 1 and 3) of the switching mechanism 30. The switching plate 29 is rotated counterclockwise in FIG. In response to the rotation of the rotary shaft 31, the position is switched to a position indicated by a two-dot chain line in the drawing (hereinafter, referred to as a first switching position). , A second switching position). However, the left and right sides 29b, 29 shown in FIG.
c are both inclined upward and bent, and the switching plate 29 is
When in the switching position, the right side 29c abuts on the lower surface of the distal end of the guide plate 28, while the left side 29b abuts on the left side of the upper wall 23d of each wall 23. When the switching plate 29 is in the second switching position, the left side 29b contacts the lower surface of the distal end portion of the guide plate 27, while the right side 29c contacts the right side of the upper wall 23d of the partition 23.

The switching mechanism 30 has a casing 30a attached to the rear wall of the cleaning water tank 20 from the rear thereof, and the rotating shaft 31 is provided on the rear wall and the rear wall of the cleaning water tank 20 in the casing 30a. It is rotatably supported via a bearing (not shown), extends through the rear wall into the washing water tank 20, and extends through a bracket 29a.
As described above. At the center of the rotating shaft 31, a rotating lever 32 is mounted so that a notch 32a formed at the center thereof is fitted at a right angle and is relatively immovable. , One end of the coil spring 33 is stopped. At the other end, the coil spring 33 is connected to the casing 3 by a bolt 34 via a hook 33a.
The rotation lever 32 is attached to the right side wall in FIG.
Is biased rightward in the figure.

The linear actuator 34 is disposed in the casing 30a below the coil spring 33. The linear actuator 34 rotates at a distal end of the rod 34a (made of an iron material) via a link lever 35. Moving lever
32 is connected to the lower end 32c. In such a case, the linear actuator 34 maintains the rod 34a at the position shown in FIG. 3 under the demagnetization of the built-in solenoid, and attracts the rod 34a against the coil spring 33 by excitation of the solenoid. This means that the rotating lever 32 is
In FIG. 3 means to rotate together with the rotation shaft 31 in the counterclockwise direction in FIG. However, the solenoid of the linear actuator 34 is powered only by receiving power from the commercial power source P _s when closing the operation switch SW which is attached in place of the outer wall of the dishwasher.

Reference numeral 40 denotes a rinsing pump in Figure 2, the rinsing pump 40, and pumping hot water from the hot water supply source 50 through a pipe P ₁ through the pipe P ₂ wash from both rinse nozzles 12a, 12b Inject into chamber 10. Washing pump 60, both cleaning nozzle both guide plates 27 and 28 in the washing tank 20, the hot water is refluxed through the switching plate 29 and the separation box 26 by pumping through a pipe P ₃ via a pipe P ₄ from the wash chamber 10 It is injected into the cleaning chamber 10 from 11a and 11b.

In the present embodiment configured as described above, when the operation switch SW is closed in cleaning each tableware 14, the linear actuator 34 is excited by the solenoid to operate the rod 34.
a, and the rotating lever 32 is rotated against the coil spring 33 in accordance with the suction of the rod 34a as described above, and
9 is switched to the first switching position. At this time, wash water tank 2
It is assumed that an appropriate amount of hot water is stored in 0.

At this state, when driving the wash pump 60, the hot water in the washing water tank 20 is pumped by the washing pump 60 through a pipe P _3, toward each dishes 14 street cleaning chamber 10 to the pipe P ₄ Injection is performed from each of the cleaning nozzles 12a and 12b. Then, such jet water flows down after cleaning the dirt on each tableware 14, is guided along each upper surface of both guide plates 27 and 28, flows down to the upper surface of switching plate 29, and is switched by this switching plate 29. It is guided and flows down into the separation box 25. In such a case, even if each tableware 14 is very dirty such as a curry dish and a large residue adheres to each tableware 14, such a severe dirt and large residue are stored in the separation box 25 as described above. Separation box with hot water flowing down
Flow down into 25. Therefore, dirt and residue larger than the mesh of the filter 25b remain on the filter 25b, and only the remaining dirty hot water flows down through the discharge pipe 24c and the overflow pipe 22 and is discharged to the outside of the cleaning hot water tank 20.

After that, when the operation switch SW is opened, the linear actuator 34 releases the suction of the rod 34a in accordance with the demagnetization of the solenoid, and the rotating lever 32 is pulled by the coil spring 33 together with the rotating shaft 31 and clockwise. Swivel switching plate 29
To the second switching position. Then, each tableware 14
The hot water that flows down from the container is guided by the two guide plates 27 and 28 and the switching plate 29 and flows down into the separation box 26. In such a case, as described above, the terrible soil and residue of each tableware 14 are stored in the separation box 25 and the dirty water is discharged to the outside from the overflow pipe 22. Is returned to the washing water tank 20 through the filter 26b in a state of very little contamination.

As described above, when cleaning the tableware 14, first, the switching mechanism 29 switches the switching plate 29 to the first switching position in accordance with the operation of the operation switch SW, and then cleans the hot water in the cleaning water tank 20. The tableware 14 is preliminarily washed by being sprayed from the nozzles 12a and 12b, and then the prewash water is supplied to both guide plates 27 and 2
It flows down into the separation box 25 via 8 and the switching plate 29, and then
Switching plate by switching mechanism 30 in response to re-operation of operation switch SW
29 is switched to the second switching position, after which the hot water flowing down from each tableware 14 flows down into the separation box 26 via both the guide plates 27, 28 and the switching plate 29.

Therefore, each dish 14 is very dirty like a curry dish,
Even if a large residue adheres to the tableware 14, a large dirt or residue is filtered during the pre-cleaning as described above.
The remaining dirty water stays on 25b and overflow pipe 2
Since the water is discharged from the tank 2, the hot water flowing down into the separation box 26 after the switching plate 29 is switched to the second switching position as described above is returned to the cleaning hot water tank 20 with very little contamination. Therefore, when cleaning the glass and the like thereafter, the cleaning quality is maintained by using the hot water from which the curry dish or the like has been washed as it is without causing clogging due to residues inside the washing nozzles 11a and 11b. It is useful for reducing hot water consumption, improving cleaning efficiency and improving cleaning quality. Further, the hot water at the time of the pre-cleaning as described above is deprived of heat by each tableware 14 to be cooled to a low temperature, and the cooled water is discharged to the outside via the overflow pipe 22 as described above. It does not mix into the hot water in the cleaning water tank 20. For this reason, the temperature of the hot water in the cleaning water tank 20 can be reliably maintained at an appropriate temperature required for the subsequent cleaning. In order to remove the dirt in the separation box 25, the guide plate 27 may be lifted upward by releasing the fastening of the flange portion 27c, and then the separation box 25 may be removed by grasping the grasping portion 25c. .

Next, a modified example of the embodiment will be described. In this modified example, as shown in FIG.
Instead of the separation box 25 and the partition plate 24, it is coaxially fixed to the upper end of the overflow pipe 22, and the impeller 80 has the two guide plates 27, 28,
A pump 90 is used instead of the switching plate 29 and the partition 23.
In addition, both pipes P ₅ and P ₆ are employed instead of the switching mechanism 30. The impeller 80 includes a rotation shaft 81 rotatably supported along the opening end of the separation box 70, a guide plate 82 extending from the rotation shaft 81 at right angles thereto, and a rotation shaft 81. A plurality of blades 83 to 86 are radially mounted at right angles to the front end (located in front of the front wall of the separation box 70), and the guide plate 82 is located at the position indicated by the solid line in FIG. To cover the entire opening of the separation box 70 in an inclined manner from above. When the impeller 80 is rotated clockwise in FIG. 4 about the rotation shaft 81, the guide plate 82 is opened at the position indicated by the two-dot chain line in FIG. Close the part (excluding the opening of the separation box 70). Pump 90 injects hot water in the washing water tank 20 through the pipe P ₆ by pumping through a pipe P ₅ the blade located below the pivot shaft 81. This means that rotates clockwise impeller 80 receives the injection quantity from the pipe P ₆ toward 83 from each blade 86. The guide plate 82 is urged to the left in FIG. 4 by a coil spring (not shown) at its tip. In FIG. 4, reference numeral 71 denotes a filter.

In this modified example having such a configuration, when pre-washing of each dishes 14 and injects the hot water in the washing water tank 20 from each blade 86 Street impeller 80 a pipe P ₆ by the pump 90 from the pipe P ₅ toward 83 Then, the guide plate 82 is switched to the position indicated by the two-dot chain line in FIG. 4 to achieve the same operation and effect at the time of preliminary cleaning as in the above embodiment. Thereafter, if the pump 90 is stopped, the impeller 80 returns to the position shown by the solid line in FIG. 4, and the same operation and effect as in the above embodiment can be obtained in the subsequent washing.

Further, in the implementation of the above-described modification, in place of the pump 90 and both the pipes P ₅ and P ₆ , when both valves 100 and 110 and both pipes P ₇ and P ₈ are connected as shown in FIG. , during pre-washing, by opening only valve 110, the blades of the impeller 80 from the hot water discharged into the pipe P ₄ the pipe P ₈ 86
Switching the position of two-dot chain line a guide plate 82 be sequentially injected toward 83 at FIG. 5 from the opening of only the valve 100 to subsequent cleaning, hot water each blade in the pipe P ₄ from the pipe P ₇ 83 5 to 86, the guide plate 82 may be switched to the position shown by the solid line in FIG. The coil spring provided at the tip of the guide plate 82 is not required.

In practicing the present invention, the present invention may be applied to household dishwashers without being limited to commercial dishwashers.

In practicing the present invention, the bottom wall of the separation box 25 is sealed after removing the filter 25b, and the inside of the separation box 25 is passed through a part of the peripheral wall and a part of the peripheral wall of the washing water tank 20. It may be implemented by communicating with the outside. In this case, the partition plate 24 and the overflow pipe 22 become unnecessary.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing an essential part of one embodiment of the present invention applied to the dishwasher shown in FIG. 2, FIG. 2 is a partially cutaway view of the dishwasher, and FIG. FIG. 4 is a sectional view of a principal part showing a modification of the embodiment, and FIG. 5 is a sectional view of a principal part showing a partial modification of the modification. Explanation of reference numerals 10: cleaning chamber, 20: cleaning water tank, 21: opening, 22
… Overflow pipe, 24… Partition plate, 25, 70… Separation box, 25b, 71… Filter, 27, 28… Guide plate, 29…
Switching plate, 30 switching mechanism, 34 linear actuator, 80 impeller, 90 pump, 100, 110 valve.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-119730 (JP, A) JP-A-62-100161 (JP, U) JP-A-63-88265 (JP, U) JP-A-63-88265 155962 (JP, U) Jiko 59-2755 (JP, Y2)

Claims (1)

(57) [Claims] 1. A dishwasher comprising: a washing chamber; and a washing water tank projecting downward from a part of a bottom wall of the washing chamber and having an opening opening into the washing chamber from a part of the bottom wall. In the washing machine, there is provided an auxiliary chamber having an opening supported in the opening of the cleaning water tank and opening into the cleaning chamber through a part of the opening, and the inside of the auxiliary chamber is provided with the cleaning water tank. A selective closing mechanism that communicates with the outside through a bottom wall or a peripheral wall of the tank and selectively closes the opening of the auxiliary chamber and the remaining portion of the opening of the cleaning water tank except for the corresponding portion. The opening of the auxiliary chamber is opened by the selective closing mechanism at the time of initial cleaning at the initial stage of cleaning, and the opening of the auxiliary chamber is selectively closed at the time of main cleaning after the initial cleaning. Dishwasher characterized by being closed by