JPS61203931A - Tablewear washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application 1-1 The present invention relates to a commercial dishwasher used in restaurants, cafeterias, etc.

2. Description of the Related Art An example of a typical dishwasher conventionally used in medium-sized restaurants and cafeterias will be described with reference to FIGS. 5 to 8. First, the cleaning chamber 1 consists of a cleaning tank 2 that is open upward, and a cleaning cover 3 that is movable up and down above the cleaning tank 2. By lowering the cleaning cover 3, the cleaning chamber 1 is sealed. be done. A lower injection nozzle arm 5 connected to a pressure pump 4 is provided below the cleaning chamber 1 so as to rotate in one direction about its center. Further, above the washing chamber 1, an upper injection nozzle arm 7 connected to the pressurizing pump 4 via a washing water conduit 6 is provided so as to rotate in one direction about the center of the upper injection nozzle arm 7. These lower injection nozzle arm 5 and upper injection nozzle arm 7 each have a
Six injection nozzle ports 8 are formed. These injection nozzle ports 8 are formed to be slightly inclined in the circumferential direction with respect to the vertical direction, and generate a rotational driving force in the lower injection nozzle arm 5 and the upper injection nozzle arm 7 by ejecting cleaning hot water. Specifically, it rotates at a rotation speed of about 1 revolution every 2 seconds.

Further, a water reservoir 9 is formed on the bottom side of the cleaning tank 2, and the pressure pump 4 is connected to this water reservoir 9. Further, a strainer 10 is attached to the upper end of the water reservoir 9 to prevent leftovers adhering to the tableware from being sucked into the pressure pump 4.

Furthermore, the washing tank 2 is provided with a rail-shaped tableware rack stand 11.
is provided, and this tableware rack stand 11 has tableware 12
A rack 13 holding .

When the pressurizing pump 4 is driven after setting the tableware 12 in this way, cleaning hot water is jetted from the injection nozzle port 8, and the lower injection nozzle arm 5 and the upper injection nozzle arm 7 are rotated, and the cleaning hot water is sprayed onto the tableware 12. Spray and clean.

Problem No. 3 to be Solved by the Invention In such a conventional dishwasher, there are the following problems.

The first problem is the stability of the tableware 12 during washing.

That is, since the lower injection nozzle arm 5 and the upper injection nozzle arm 7 are rotated by the reaction force of the cleaning hot water injected from the injection nozzle port 8 as described above, they cannot rotate in perfect synchronization. do not have. Therefore, tableware 12
The upper and lower jets of washing water collide with the tableware 12 at different times, and especially when the tableware 12 is a glass, if the jet from below is strong, the glass may be lifted and sent flying. Put it away. Therefore, when setting the washing conditions, it is not possible to increase the jetting pressure and the amount of water. Moreover, when the weight of the tableware 12 is low, the jetting pressure and the amount of water must be lowered even more. It is impossible to remove stains such as lipstick.

The second problem is the range that can be washed.

That is, in general, the structure of a dishwasher is such that the washing chamber 1 is rectangular, and the injection nozzle arms 5 and 7 rotate four times. Therefore, as shown in Fig. 7, the washable range is the area shown by arrow A, and the washing chamber 1 shown by diagonal lines.
The jet stream is not supplied to the corners of the area.

Therefore, the setting position of the tableware 12 is limited to the area shown by arrow A, and the effective usage rate of the volume of the washing chamber 1 is low.

The third problem is uneven cleaning due to different installation positions of the tableware 12. For example, in FIG. 8, arrow B indicates the cleaning range of the injection nozzle port 8 near the center of rotation, and arrow C indicates the cleaning range of the injection nozzle port 8 near the outer periphery. In this case, the circumferential speeds are different between the center and the outer periphery, and the outer periphery tableware 12 receives the jet for a shorter time than the center side tableware 12, and the amount of water in the jet is also smaller. Therefore, the entire tableware 12 is not evenly cleaned, but uneven cleaning occurs depending on the installation position. Therefore, it is necessary to take structural considerations to prevent uneven cleaning.

The fourth problem is that the ratio of effective cleaning time to cleaning time is small. That is, as mentioned above, the lower injection nozzle arm 5 and the upper injection nozzle arm 7 rotate at a rate of about 1 rotation every 2 seconds, and for example, when the washing time is 40 seconds, the individual dishes 12 The number of times the jet of washing hot water is received is two times in one rotation, so it is 80 times in 40 seconds. Therefore, the total time during which the washing water jet is actually applied 80 times is about 20% of the washing time (40 seconds).

Despite these drawbacks of conventional dishwashers, the structure described above is the mainstream.
This is due to the following reasons.

(1) Since cleaning is performed while the injection nozzle arms 5 and 7 rotate, cleaning hot water can be sprayed over a relatively wide range with the upper and lower injection nozzle arms 5 and 7, and the pressure pump 4 Small size is fine. (Most products have a power of about 1 horsepower.) (2) By appropriately selecting the position and spray direction of the spray nozzle ports 8 formed on the spray nozzle arms 5 and 7, relatively uneven cleaning can be achieved. It is possible to obtain a state with less.

(3) If high cleaning performance is not desired, the structure can be constructed relatively simply.

Means for Solving the Problems The present invention provides a nozzle that spouts cleaning hot water upwards below a cleaning chamber, and a nozzle that spouts cleaning hot water downwards above the cleaning chamber. A tableware rack stand on which a rack for holding tableware is placed is provided, and the tableware rack stand is configured to move approximately horizontally.

To supply a jet of washing hot water evenly distributed over the entire washing chamber even if the shape of the washing chamber is not circular, and to make the washing hot water evenly impinge on all parts of the whole tableware by moving a tableware rack stand.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 to 4. First, the cleaning chamber 14 has a cleaning tank 15 opened upward.
A cleaning chamber cover 16 is provided on the top of the cleaning tank 15 so as to be movable up and down. By lowering the cleaning chamber cover 16, the cleaning chamber 14 is sealed. Nozzles 17 and 18 are provided below and above this cleaning chamber 14, respectively. The lower nozzle 17 consists of injection nozzle arms 20 extending from a joint 19 located at the rear center of the cleaning chamber 14 to the left and right of the joint 19, and each of these four injection nozzle arms 20 has an upwardly facing A plurality of injection nozzle ports 21 are provided. The two injection nozzle arms 2o on the left side are integrated and attached to the joint 19 so as to be rotatable. and,
The joint 19 is connected to a pressure pump 22. Further, a cleaning hot water conduit 23 is provided which is connected to the pressurizing pump 22 and stands in the rear center of the cleaning chamber 14, and the upper nozzle 18 is attached to the upper end of this cleaning hot water conduit 23. This nozzle 18 consists of three injection nozzle arms 24, and these injection nozzle arms 2
A plurality of downwardly directed injection nozzle ports 25 are formed in each of the holes 4 .

The number of injection nozzle holes 21 is set to be greater than the number of injection nozzle ports 25.

Next, on the upper inner wall of the washing chamber 14 near the nozzle 17, a tray 26 made of angle material is provided, and a tableware rack pedestal 27 is attached to these trays 26 so as to be able to reciprocate. . In other words, this tableware rack stand 27
The rack 29 that holds the tableware 28 is placed thereon, and is formed into a frame shape with two shafts 30 passing through its sides, and the ends of these shafts 30 are made of plastic with a low coefficient of friction. Rollers 31 formed by a base or the like are fixed, and these rollers 31 are placed on the stand 26. The tip of each roller 31 is joined to the inner wall of the washing chamber 14 without any play, so that no backlash occurs when the dish rack base 27 moves back and forth in the left and right direction. Further, a U-shaped plate 32 is fixed to the right outer surface of the dish rack base 27, and a roller of a swinging mechanism 33 is connected between the plate 32 and the outer surface of the dish rack base 27. 34 has been inserted.

The roller 34 is attached to an eccentric cam 35, which is fixed to the upper end of a support shaft 37 held by a bearing 36, and a sprocket wheel 38 is fixed to the lower end of this support shaft 37. This sprocket wheel 38
is connected to a motor 42 with a reduction gear 41 via a chain 39 and a sprocket wheel 40.

Next, a water reservoir 43 opened upward is formed at the bottom of the cleaning tank 15, and this water reservoir 43 is connected to the pressure pump 22.
It is connected to the. Further, a strainer 44 is attached to the upper surface of this water reservoir 43.

The above-mentioned washing water is heated to about 65° C. by a heating device using an electric heater or a gas burner (not shown). Also, although not shown in the figure, this washing water is
．． An automatic detergent supply device is attached to supply alkaline detergent to maintain an alkaline concentration of about 2%.

Although not particularly shown in the drawings, in addition to the above-mentioned cleaning water supply structure, a 10-system rinsing device having completely different cleaning water supply routes is provided.

In such a configuration, first, the washing chamber cover 16 is raised to open the washing chamber 14, and the rack 29 holding the dishes 28 is placed on the dish rack stand 27. Then, the cleaning chamber cover 16 is lowered to seal the cleaning chamber 14, and the pressure pump 22 is started.

Washing hot water in the water reservoir 43 is sucked in by the pressure pump 22, and upward and downward jets are generated from the injection nozzle opening 21.25 of the nozzle 17.18. Motor 4 at the same time
2 is also in operation, and the rotation of the eccentric cam 35 reciprocates the tableware rack base 27 in the left-right direction with a stroke corresponding to the amount of eccentricity of the roller 34.

In such a cleaning operation, first, the nozzles 17 and 18
The injection nozzle ports 21 and 25 are arranged approximately evenly throughout the cleaning chamber 14, so even if the cleaning chamber 14 is rectangular, it is possible to supply an even jet stream from the center to the corners. It is possible. Therefore, the tableware 28 held on the rack 29 is constantly exposed to jets from above and below, and even if the speed of the jet is high or the amount of water in the jet is large, it will not be blown upward and will remain stable on the rack 29. are doing.

Further, the position of the tableware 28 is set close to the lower nozzle 17. On the other hand, the jet stream injected from the injection nozzle opening 21.25 spreads as it moves away from the injection nozzle opening 21.25. Therefore, being close to the lower nozzle 17 means that it is less likely to receive a sufficiently diffused jet stream, but as shown in FIG. Since the number is greater than the number of nozzle ports 25, the jet stream is sufficiently supplied to the entire tableware 28. In this case, the injection nozzle port 2
1.25, the blowout amount of each wash water is set to be about 1.8 times higher at the top than at the bottom, so that the blowout amounts of the upper and lower washwaters are the same.

In particular, since the tableware rack stand 27 reciprocates from side to side during washing, even if the distribution of the amount of jet flow supplied at each position is different, the washing hot water is evenly supplied to the entire surface of the tableware 28. , even the slightest unevenness in cleaning is eliminated.

Accordingly, the jet stream injected from the upper and lower injection nozzle ports 21.25 is blown out at a rate of about 2 kg/d, thereby obtaining a higher cleaning effect. Therefore, the horsepower of the pressure pump 22 must be 2 to 4 horsepower, which is 2 to 4 times the conventional pressure pump, but this is necessary in order to obtain a high cleaning effect. For example, due to the above-mentioned action, the cleaning ability is such that lipstick adhering to glasses can be removed extremely well.

It should be noted that when cleaning is finished, the strainer 44 of the water reservoir 43 must be removed and washed each time, but with the cleaning chamber cover 16 raised, the nozzle 17 located above the strainer 44 is moved upward. Rotate.

Further, in the embodiment described above, the cleaning chamber cover 16 was explained as being able to be moved up and down, but in actual practice, a cover that can be opened and closed may be attached to the front of the cleaning chamber 14, and this may be used as the cleaning chamber cover. In this case, since the top surface of the device can be formed as a flat and fixed surface, it can also be used as a workbench.

Furthermore, the movement of the tableware rack stand 27 is not limited to reciprocating movement as in the embodiment described above, but may also be made to swing rotationally without changing its direction.

Effects of the Invention As described above, the present invention includes a plurality of nozzles disposed above and below a washing chamber in a predetermined space for spouting washing hot water upward and downward, and a dish rack that moves approximately horizontally between these nozzles. Since the table is movable, it is possible to supply a jet stream to the entire washing chamber, no matter what shape it is.Moreover, since the distribution of the jet stream can be made even, the dishes can be cleaned easily. Always receiving jets of cleaning water from above and below,
This allows the dishes to be stably held on the rack without being blown up by the force of the jet.
It is possible to provide a strong jet stream and increase the amount of water used for cleaning, resulting in extremely high cleaning performance.
It is possible to perform even washing, and the dishes are substantially washed throughout the washing time, further enhancing the effectiveness.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a case of an apparatus according to an embodiment of the present invention, indicated by broken lines, Fig. 2 is a plan view showing the structure of a tableware rack, and Fig. 3 is a spraying of washing water onto the tableware. A front view showing the state, FIG. 4 is a vertical side view of the rocking device, FIG. 5 is a vertical side view showing a conventional example, and FIG. 6 is a perspective view with the cleaning chamber cover raised and a portion thereof cut away. FIG. 7 is a plan view showing the washing range, and FIG. 8 is a plan view showing one of the causes of uneven washing of individual dishes. 14 Washing chamber, 16・Cleaning chamber cover, 17, 18...
Nozzle, 27...Tableware rack stand, 28...Tableware, 29.
・Rack 3 ”Kon

Claims (1)

[Claims] 1. A cleaning chamber of a predetermined space is formed which is hermetically covered with a cleaning chamber cover that can be opened and closed, and a plurality of cleaning hot water are spouted upward and downward into the lower and upper parts of the cleaning chamber. 1. A dishwasher comprising nozzles, and a dish rack base movable in a substantially horizontal direction to which a rack for holding dishes to be washed is attached between these nozzles. 2. The dishwasher according to claim 1, characterized in that a dish rack is provided close to the lower nozzles, and the arrangement density of the lower nozzles is higher than the arrangement density of the upper nozzles. 3. The dishwasher according to claim 1, characterized in that the dish rack table is moved back and forth.