JPH0451754Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a dishwasher.

(Prior art) Conventionally, in this type of dishwasher, the washing liquid in the washing liquid tank is sprayed into the main body of the dishwasher via a spray nozzle by a washing pump to wash and rinse the dishes inside the main body of the dishwasher. There is a method that does this (for example, see Japanese Patent Application Laid-Open No. 50-63768).

(Problems to be Solved by the Invention) However, in such a configuration, as the dirt on the dishes is removed, the stains in the cleaning liquid increase, making it difficult to clean the surfaces of the dishes sufficiently after washing. In particular, if the tableware is a transparent glass used only to serve water to customers, if you wash the glass with the cleaning solution used after cleaning curry plates, etc., the surface of the glass will become even more dirty with dirt from the cleaning solution. The reality was that I had to put it away. Therefore, in order to improve the finish of washing dishes, the number of times the dirty washing liquid in the washing liquid tank must be replaced with fresh washing liquid increases, which increases the amount of washing liquid consumed, which is uneconomical. In addition, in order to improve the finish of tableware washing, the rinsing time that is normally done after washing the tableware becomes longer, which lowers the temperature of the cleaning solution, reducing the sterilizing effect of the tableware and causing the tableware to become dry. was having a negative impact. To solve this problem, it is conceivable to increase the size of the cleaning liquid supply equipment, but this increases the cost and is not practical.

Therefore, in order to deal with the above-mentioned problems, the present invention effectively utilizes the function of the double-pipe overflow pipe in a dishwasher, and divides the cleaning liquid in the hot water storage tank to distribute the same divided cleaning liquid into each part. The aim is to prevent such stains while allowing the use of different types of dishes depending on how dirty they are.

(Means for Solving the Problem) In order to solve the problem, the structural feature of the present invention is that the cleaning liquid supplied from the hot water supply source into the hot water storage tank opened at the bottom wall of the cleaning tank is transferred to the cleaning tank by a cleaning pump. The washing liquid supplied from the hot water source is sprayed into the washing tank as rinsing water through the rinsing nozzle by a rinsing pump to rinse the dishes. In the dishwasher, a partition wall is provided upright in the hot water storage tank to form a pair of divided tanks, and a partition wall is connected between each bottom of the pair of divided tanks and the washing pump to form a pair of divided tanks. A switching valve that selectively switches and supplies each cleaning liquid in the tank to the cleaning pump, and a pair of double-pipe overflow pipes installed vertically in the pair of split tanks, respectively, are provided. One is an inner tube that is erected on the bottom wall of one of the pair of divided tanks and opens outward through the bottom wall, and the other is fitted into the inner tube from above and from the outside. an outer tube forming a communication path between the outer circumferential surface of the inner tube and the upper end opening for communicating the interior of the one divided tank from below to the upper end opening of the inner tube;
The other of the pair of overflow pipes is provided with an inner pipe that is erected on the bottom wall of the other of the pair of divided tanks and opens outward through the bottom wall, and an inner pipe that is connected upwardly and outwardly to the inner pipe. and an outer tube that is fitted from the inner tube and forms a communication path between the outer peripheral surface and the upper end opening of the inner tube that communicates the inside of the other divided tank from below to the upper end opening of the inner tube. and the upper end openings of both inner tubes are located above the upper edge of the partition wall, and the guide plate covers the entire opening of the other divided tank from above. The partition wall is supported so as to extend upwardly of the one divided tank, beyond the upper edge of the partition wall, and inclined downwardly.

(Function and Effect) By configuring the present invention as described above, when the tableware is a heavily soiled tableware such as a curry plate or a bowl, the cleaning liquid from one of the pair of divided tanks can be used for the cleaning by the switching valve. When applied to the pump, the cleaning liquid in the one divided tank is injected into the washing tank via the washing nozzle in response to the operation of the washing pump, thereby washing heavily soiled dishes. Next, the washing liquid from the hot water source is injected into the washing tank through the rinsing nozzle by the rinsing pump, thereby rinsing the washed dishes as described above.

On the other hand, if the tableware is a clean tableware such as a transparent glass, if the cleaning liquid from the other of the pair of divided tanks is applied to the cleaning pump by the switching valve, the cleaning liquid in the other divided tank can be In response to the operation of the washing pump, water is sprayed into the washing tank through the washing nozzle to wash lightly soiled dishes. Next, the washing liquid from the hot water source is injected into the washing tank through the rinsing nozzle by the rinsing pump, thereby rinsing the dishes such as glasses that have been washed as described above.

As described above, the dishes are divided into those that are heavily soiled and those that are lightly soiled, and the cleaning liquid in one of the divided tanks is used for the dishes that are heavily soiled, while the cleaning liquid in the other divided tank is used for the dishes that are lightly soiled. By using the cleaning liquid in the separate tanks, it is possible to reliably prevent clean dishes from becoming even more stained by the cleaning liquid used to wash heavily soiled dishes. Efficiently removes stains from tableware. Therefore, clean tableware can be properly rinsed at high temperatures without increasing the rinsing time and the amount of rinsing liquid consumed, and water conservation can be promoted. Therefore, there is no need to increase the capacity of the hot water source.

Further, as mentioned above, the cleaning liquid used for washing heavily soiled dishes is either directly returned to the one divided tank or guided by the guide plate, assuming that the cleaning liquid is present in the other divided tank. The water is then refluxed into the one divided tank. Therefore, if the cleaning pump is stopped, the cleaning liquid thus returned will remain in the one divided tank.
In such a case, the cleaning liquid flowing back into the one divided tank is prevented from flowing into the other divided tank by the guide plate, so that the cleaning liquid in the other divided tank may become heavily contaminated. will not get dirty.

Therefore, as described above, the rinsing liquid used for rinsing heavily soiled tableware flows over the entire surface of each washing liquid in the two divided tanks, beyond the upper edge of the partition wall. Then, the cleaning liquid in each divided tank is pushed downward by the rinsing liquid on each surface thereof, and is discharged to the outside through the communication passage of each overflow pipe and each inner pipe. Therefore, the residue of the heavily contaminated cleaning liquid in the one divided tank is purified by mixing with the less contaminated rinsing liquid, and the entire cleaning liquid in the one divided tank becomes hot and clean. Therefore, even if such a cleaning liquid is used to wash heavily soiled dishes afterwards, the stains can be sufficiently removed, and as a result, the number of replacements of the cleaning liquid in the hot water tank can be reduced by effectively utilizing the rinsing liquid. As a result, the consumption of cleaning liquid and detergent can be significantly reduced, and the cleaning time can be shortened, that is, the number of dishes to be washed can be increased. Note that the cleaning liquid in the other divided tank can be purified in substantially the same manner.

In addition, as mentioned above, the cleaning liquid used for cleaning dishes with little dirt is either directly returned to the other divided tank or guided by the guide plate, assuming the existence of the cleaning liquid in the one divided tank. The washing liquid flows over the surface of the cleaning liquid in the one divided tank, passes over the upper edge of the partition wall, and flows back into the other divided tank. Therefore, if the cleaning pump is stopped,
The cleaning liquid thus refluxed remains in the other divided tank as it is.

Therefore, as described above, the rinsing liquid used for rinsing lightly soiled tableware flows over the entire surface of each cleaning liquid in the two divided tanks, beyond the upper edge of the partition wall. Then, the cleaning liquid in each divided tank is pushed downward by the rinsing liquid on each surface thereof, and is discharged to the outside through the communication passage of each overflow pipe and each inner pipe. Therefore, the remaining cleaning liquid with less dirt in the other divided tank is purified by mixing with the rinsing liquid with even less dirt, and the entire cleaning liquid in the other divided tank becomes hotter and cleaner. In addition, as mentioned above, by effectively using the rinsing liquid used for dishes with little dirt, it is possible to further maintain the temperature of the cleaning liquid in the one divided tank and promote purification, thereby improving the finish of washing. Further, it is possible to promote saving of cleaning liquid and increase the number of dishes to be washed by shortening the cleaning time.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a dishwasher according to the present invention. This dishwasher has a washing chamber 10, and this washing chamber 10 has a washing tank 10a.
and a hot water storage tank 10b protruding downward from the left side in FIG. 1 of the bottom wall of the cleaning tank 10a. Inside the cleaning tank 10a, a pair of upper and lower cleaning nozzles 11a and 11b are opposed to each other and supported by appropriate means, and a pair of upper and lower rinse nozzles 12a and 12b are connected to each cleaning nozzle 1.
They are supported by appropriate means on the inside of 1a and 11b, facing each other. Therefore, each cleaning nozzle 11a, 11b is connected to each pipe P1 as described below.
The washing water from a and P1b is sprayed toward the cupboard 13, while each rinsing nozzle 12a and 12b is
Washing hot water from each of the pipes P2a and P2b as described below is injected toward the cupboard 13. In addition, cupboard 1
3 indicates each rinse nozzle 12 in the cleaning tank 10a.
It is supported between a and 12b by appropriate means.

The hot water storage tank 10b has a cleaning tank 10a at its opening.
A guide plate 14 is fitted into the opening of the hot water storage tank 10b in parallel to the bottom wall of the hot water storage tank 10b, as shown in FIGS. 1 to 6. The guide plate 14 has an inclined surface portion 14a that slopes downward from the rear edge of the opening of the hot water storage tank 10b toward the approximate center of the opening.
As shown in FIGS. 2 to 6, the opening 14b is
The inner circumferential edge portion thereof is bent upward in an annular shape. In addition, a filter 1 is provided in an annular opening 14c formed horizontally in the remaining portion of the guide plate 14.
5 is placed and fixed. Further, inside the hot water storage tank 10b, as shown in FIGS. 1 to 6, a partition plate 16 is vertically installed to form a pair of divided tanks A and B. The edge portion 16a is located directly below the inclined portion 14a of the partition plate 14 (see FIG. 2). Therefore, the volume of divided tank A is larger than that of divided tank B by a predetermined value.

The double-pipe overflow pipe 20 is vertically installed in the center of the divided tank A, and the overflow pipe 20 is composed of an inner pipe 21 and an outer pipe 22. The inner tube 21 has a lower end opening 21
It is removably fitted into the center of the bottom wall of the divided tank A at point a, and the lower end opening 21a of this inner tube 21 communicates with a drain pipe (not shown). In addition, inner pipe 2
The upper end opening 21b of the filter 15 is located directly below the filter 15, and the upper end 21b is located higher than the upper edge 16a of the partition plate 16 by a predetermined height H (see FIG. 2). On the other hand, the outer tube 22 passes through the filter 15 and is fitted into the inner tube 21 from above and from the outside, and the outer tube 22 is coaxially and fixedly supported with respect to the inner tube 21 by appropriate means. Been,
An annular passage 23 is formed between the inner tube 21 and the peripheral wall of the inner tube 21 . Further, the lower end opening 22a of the outer tube 22 opens into the divided tank A at its lower part as shown in the second diagram, and the upper wall 22b of the outer tube 22 and the upper end opening 21b of the inner tube 21 A cavity 24 communicating with the annular passage 23 is formed between the two.

The double-pipe overflow pipe 30 is vertically installed in the center of the divided tank B, and the overflow pipe 30 is composed of an inner pipe 31 and an outer pipe 32. The inner tube 31 has a lower end opening 31a.
The inner tube 31 is removably fitted in the center of the bottom wall of the divided tank B, and the lower end opening 31a of the inner tube 31 communicates with a suitable drain pipe (not shown). Further, the upper end opening 31b of the inner tube 31 is located directly below the inclined surface portion 14a of the guide plate 14, and the upper end opening 21b is located on the same horizontal plane as the upper end opening 21b of the inner tube 21. On the other hand, the outer tube 32
The outer tube 32 is fitted into the inner tube 31 from above and from the outside through the opening 14b of the inclined surface portion 14a with a clearance, and the outer tube 32 is coaxially fixed to the inner tube 31 by appropriate means. is supported by the inner tube 31
An annular passage 33 is formed between the peripheral wall and the peripheral wall. Further, the lower end opening 32a of the outer tube 32 opens into the divided tank B at its lower part as shown in FIG. 2, and the upper wall 32b of the outer tube 32 and the upper end opening 31b of the inner tube 31 A cavity 34 communicating with the annular passage 33 is formed between the two. However, the inner pipe 31
and the diameters of the outer tube 32 are the same as those of the inner tube 21 and the outer tube 22.
Each diameter is smaller than the diameter of the other diameter.

When the hot water supply valve 40 is opened, cleaning hot water at a predetermined temperature (approximately 80°C) is supplied from a hot water supply source (not shown) to the pipe P.
3 through the cleaning tank 10a and the filter 15, and sequentially supplied into each of the divided tanks A and B. On the other hand, when the hot water supply valve 50 is opened, cleaning hot water from the hot water supply source is supplied through the pipe 50 into the booster 60 as rinsing hot water. As shown in FIGS. 1 to 6, the manual switching valve 70 connects each pipe P5, P6 into each divided tank A, B through its bottom wall at each inlet 71, 72.
In the first switching state, the switching valve 70 allows the cleaning hot water in the divided tank A to be applied through the pipe P5 and flow out from the outlet 73 into the pipe P7, and on the other hand, In the second switching state, the cleaning hot water in the divided tank B is applied through the pipe P6 and flows out from the outlet 73 into the pipe P7.

The cleaning pump Pa pumps the cleaning hot water from the pipe P7 into the pipe P1a, and also pumps the cleaning hot water in the upstream part of the pipe P1a into the pipe P1b. The rinsing pump Pb pumps the rinsing water from the booster 60 into the piping P2a through the piping P8, and also pumps the rinsing water in the upstream portion of the piping P2a into the piping P2b. Note that the rinse inside the tank 80 is applied to the inside of the pipe P8 by the valve mechanism 80a. Further, the detergent in the tank 90 is applied to the cleaning tank 10a through a pipe 90a.

In this embodiment configured as above, when the water supply valve 40 is opened, the cleaning hot water from the hot water source flows into the cleaning tank 10a through the pipe P3, and further passes through the filter 15 as shown in FIG. It flows into the divided tank A as shown by the arrow in the figure. After that, when the cleaning hot water in the divided tank A increases and reaches the level of the upper edge 16a of the partition plate 16, the cleaning hot water in the divided tank A exceeds the upper edge 16a of the partition plate 16 and flows into the divided tank. It begins to flow into B. In this state, when the cleaning hot water in the divided tank B increases to the level of the upper edge 16a of the partition plate 16, the water supply valve 40 is closed. As a result, each of the cleaning hot water in the two divided tanks A and B becomes full, and hot water supply is completed. It is assumed that the cupboard 13 contains heavily soiled tableware such as curry plates and bowls.

At this stage, when the detergent in the tank 90 is supplied into the washing tank 10a, the detergent is supplied into the washing tank 10a.
The water flows along the bottom wall of the tank A and mixes with the washing water in the divided tank A. Next, when the switching valve 70 enters the first switching state and the cleaning pump Pa is activated, the cleaning water in the divided tank A, together with the detergent, flows as shown in FIG. 3.
It passes through the pipe P5, the switching valve 70, and the pipe P7, and is pumped out by the cleaning pump Pa, and both pipes P1a and P1b are pumped out.
from both washing nozzles 11a, 11b to the cupboard 1.
It is injected towards 3. This removes heavy dirt from the dishes in the cupboard 13.

In addition, the washing water used for washing in this way is
It passes through the filter 15 and returns to the divided tank A, which becomes almost full (see FIG. 4). At this time, the temperature of the washing water was around 60 (℃). In such case,
When the washing hot water flows back into the divided tank A, guide plate 1
The cleaning hot water flowing on the slope portion 14a of No. 4 is guided toward the filter 15 along the slope portion 14a, so that the cleaning hot water does not mix with the cleaning hot water in the divided tank B and contaminate it. Furthermore, even if there is a play between the outer peripheral surface of the outer pipe 32 of the overflow pipe 30 and the inner peripheral edge portion of the opening 14b of the inclined surface portion 14a, the inner peripheral surface portion is bent upward in an annular shape. Also, foreign matter such as leftover food does not fall into the divided tank B from the play gap. Please note that the cleaning pump is not currently available.
Pa stops.

Next, when the hot water supply valve 50 is opened, the booster 6 is opened.
Washing hot water supplied as rinsing water from the hot water source into the pipe 0 is supplied to the piping P by the operation of the rinsing pump Pb.
8 and both pipes P2a, P2b and both rinse nozzles 12a, 12b along with rinse from tank 80.
It is sprayed towards the cupboard 13 from there. As a result, the tableware is rinsed. Further, the rinsing water used for rinsing in this manner flows down into the divided tank A through the filter 15.

However, since both the divided tanks A and B remain full of washing water, the rinsing water flowing down as described above flows into each of the divided tanks A and B, as shown in Figure 4. Flows uniformly over the entire surface of the wash water. Therefore, the dirty washing water in the divided tank A is pushed downward by the above-mentioned rinsing water, passes through the annular passage 23 and the cavity 24 in the overflow pipe 20, and the inner pipe 21, and is discharged into the drain pipe. (See Figure 4). Therefore, the dirty washing water in the divided tank A is reduced and the rinsing water is mixed in, and the washing water in the divided tank A is brought closer to high-temperature clean water. On the other hand, the washing hot water in divided tank B is also
The temperature will be maintained at a high temperature in substantially the same way as in the case of . In such a case, the overflow pipe 20
If the diameters of the outer pipe 22 and inner pipe 21 are selected to be large in accordance with the volume of the divided tank A and the degree of contamination of the cleaning water, the cleaning water in the divided tank A can be efficiently purified. . Further, even when the above-described dishwashing is applied to the subsequent washing of other dirty dishes, it is possible to reliably remove the stains from the dishes since it depends on the washing water that has been purified by the rinsing water. Additionally, the rinsing water is used for the next wash without being drained, which helps save water.
Note that the rinse pump Pb is stopped at this stage.

Next, place clean dishes such as glasses in cupboard 1.
3 to perform washing/rinsing, the switching valve 70 enters the second switching state and the washing pump
When Pa is activated, the cleaning water in the divided tank B flows from the tank 90 through the cleaning tank 10a, the filter 15, and the detergent mixed in through the surface of the cleaning water in the divided tank A, and flows into the pipe P6 as shown in FIG. , switching valve 70
It passes through the pipe P7, is pumped out by the washing pump Pa, passes through both the pipes P1a and P1b, and reaches both the washing nozzles 1.
It is injected toward the cupboard 13 from 1a and 11b.
As a result, light stains on the dishes in the cupboard 13 are removed.

In addition, the washing water used for washing in this way is
The water flows down through the filter 15, flows over the surface of the washing hot water in the divided tank A, crosses the partition plate 16, and returns to the divided tank B, which becomes almost full of water (see FIG. 5). Also,
When washing dishes such as glasses with little dirt as described above, the washing water in divided tank B is used instead of the washing water in divided tank A for heavily soiled dishes. Tableware such as glasses with little dirt is not soiled by the washing water in the divided tank A, and the dirt can be reliably removed.
Further, the upper edge 16a of the partition plate 16 is connected to each inner tube 21,
31, the washing water can be reliably returned from the surface of the washing water in the divided tank A to the divided tank B. Note that the cleaning pump Pa is stopped at this stage.

Next, when the hot water supply valve 50 is opened, the rinsing water from the booster 60 is supplied to the rinsing pump in the same manner as described above.
Both rinsing nozzles 12a, 12b are activated by Pb.
The water is sprayed together with rinse onto the cupboard 13 from outside. As a result, tableware such as glasses is rinsed. In this case, since the tableware is in a clean state as described above, the rinsing time is shortened, ensuring a sterilizing effect at high temperatures and being effective in saving water. The rinsing water thus used for rinsing flows down through the filter 15 toward the divided tank A, and flows uniformly over the entire surface of each washing water in both the divided tanks A and B in the same way as described above. Therefore, the slightly contaminated cleaning water in the divided tank B is pushed downward by the above-mentioned rinsing water and flows into the overflow pipe 3.
The annular passage 33 and cavity 34 in 0 and the inner tube 31
and is discharged into the drain pipe (see Fig. 6).

Therefore, the dirty washing water in the divided tank B is reduced and the rinsing water is mixed in, and the washing water in the divided tank B is brought closer to high-temperature clean water. On the other hand, the cleaning hot water in the divided tank A is further promoted to have a high temperature and clean hot water in substantially the same manner. In such a case, each diameter of the outer pipe 32 and inner pipe 31 of the overflow pipe 30 is selected to be smaller than each diameter of the outer pipe 22 and the inner pipe 21 of the overflow pipe 20, but the cleaning hot water in the divided tank B is Since the degree of contamination and volume are smaller than the degree of contamination and volume of the washing water in divided tank A,
The cleaning hot water inside can be efficiently purified. Also,
When washing other dishes next time, use divided tank A or B.
Even the cleaning water that has been purified by the rinsing water inside is used to wash the dishes separately depending on how dirty they are, so you can reliably remove the dirt from the dishes. In addition, water for rinsing dishes such as glasses can be used for the next wash without draining, helping to save water.

In addition, in order to discharge all the washing hot water in the hot water storage tank 10b after all the work is completed, the entire overflow pipe 30 may be pulled out from above.

In addition, when implementing the present invention, the partition plate 16
However, in general, the hot water storage tank 10b may be divided by forming partition walls.

Furthermore, in carrying out the present invention, the cleaning nozzle 11a or 11b and the rinsing nozzle 12a or 1
2b may be omitted.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a dishwasher according to the present invention, Fig. 2 is a schematic sectional view taken along line 2-2 in Fig. 1, and Figs. 3 to 6 are cleaning in the same schematic sectional view. It is a flow explanatory diagram of hot water. Explanation of symbols: 10a...Cleaning tank, 10b...Hot water storage tank, 11a, 11b...Cleaning nozzle, 12a,
12b... Rinse nozzle, 14... Guide plate, 16
... Partition plate, 20, 30 ... Overflow pipe,
21, 31... Inner tube, 22, 32... Outer tube, 2
3, 33... Communication path, 24, 34... Blank space, 70
...Switching valve, A, B...Divided tank, Pa...Washing pump, Pb...Rinse pump.

Claims (1)

[Scope of utility model registration request] A cleaning liquid supplied from a hot water source into a hot water storage tank opened at the bottom wall of the cleaning tank is injected into the cleaning tank through a cleaning nozzle by a cleaning pump to wash the dishes in the washing tank, and a washing liquid is supplied from a hot water source to a hot water storage tank opened at the bottom wall of the cleaning tank. In a dishwasher configured to rinse the dishes by injecting the supplied cleaning liquid into the washing tank through a rinsing nozzle as rinsing water by a rinsing pump, the dishwasher is installed vertically in the hot water storage tank to form a pair of divided tanks. a partition wall, and a switching valve connected between each bottom of the pair of divided tanks and the cleaning pump to selectively switch and supply each cleaning liquid in the pair of divided tanks to the cleaning pump;
A pair of double-pipe overflow pipes are provided, each of which is erected within the pair of divided tanks, and one of the pair of overflow pipes is erected on the bottom wall of one of the pair of divided tanks. The inside of the one divided tank is between an inner pipe which is opened outwardly through the bottom wall, and an outer circumferential surface and an upper end opening of the inner pipe which is fitted from above and from the outside. and an outer tube forming a communication path that communicates from below to the upper end opening of the inner tube, while the other of the pair of overflow tubes is connected to the bottom of the other of the pair of divided tanks. An inner tube that is erected on the wall and opens outward through the bottom wall, and the other is fitted into the inner tube from above and from the outside and is connected to the outer circumferential surface and the upper end opening of the inner tube. and an outer tube forming a communication path that communicates the inside of the divided tank from below to the upper end opening of the inner tube, and the upper end openings of both inner tubes are closer to the upper edge of the partition wall. furthermore, the guide plate extends downwardly over the upper edge of the partition wall toward the top of the one partitioned tank so as to cover the entire opening of the other partitioned tank from above. A dishwasher characterized by being extended and supported at an angle.