JPH07322994A - Dish washer - Google Patents

Abstract

PURPOSE:To provide a dish washer capable of smoothly discharging the stains of oils and fats in a washing tank and reducing the cost on heat and a detergent. CONSTITUTION:This dish washer 1 is provided with a washing chamber 3, a washing tank 12 partitioned from the washing chamber 3 by a bottom plate 9, a filter 10 provided on part of the bottom plate 9, an overflow pipe 13 erected at the portion beneath the bottom plate 9 other than the filter 10 and opened in the washing tank 12, and a shielding plate 11 partitioning the washing water surface in the relatively wide area around the overflow pipe 13 and the washing water surface below the filter 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher which circulates wash water in a wash tank in a wash chamber to wash / rinse an object to be washed.

[0002]

2. Description of the Related Art Conventionally, a cleaning nozzle (cleaning spray nozzle) and a rinsing nozzle (rinsing spray nozzle) are rotatably arranged above and below a cleaning chamber, respectively, and a cleaning object such as a dish installed between them is cleaned. A dishwasher for rinsing is shown in, for example, Japanese Utility Model Publication No. 1-35706 (A47L15 / 42).

That is, in this type of dishwasher, first, the washing water in the washing tank is circulated to the upper and lower washing nozzles of the washing chamber by the washing pump, and the washing water sprayed downward from the washing nozzle provided at the top, The cleaning operation is performed by the cleaning water sprayed upward from the cleaning nozzle provided in the lower part. After that, the rinse water in the booster tank is fed by a rinse pump to the rinse nozzles that are also provided above and below the cleaning chamber, and the rinse water that is jetted downward from the rinse nozzle that is provided at the top and the rinse nozzle that is provided at the bottom are also used. Rinsing operation is performed by flushing the wash water containing the detergent adhering to the object to be washed with the rinse water sprayed upward to complete the operation of one cycle.

In this case, a filter is provided on the bottom plate which separates the cleaning chamber and the cleaning tank, and the residual food attached to the object to be cleaned is filtered out by this filter. Further, the temperature of the rinse water in the booster tank is set to a high temperature in order to obtain a natural drying effect after sterilization and finishing of the object to be cleaned, and the rinse water after being sprayed from the rinse nozzle passes through the filter. Although it is collected in the washing tank, it is added to the washing water, so that approximately the same amount of water is drained.

Here, the oil and fat stains attached to the object to be cleaned enter the cleaning tank together with the cleaning water through the filter and float on the surface of the cleaning water. In order to discharge the floating oil and fat, the overflow pipe is conventionally installed in the washing tank as described in the above publication, and the water surface portion of the washing water having the increased water level is preferentially discharged as described above. I was trying to do it.

Further, in the above-mentioned publication, a cylinder is attached to the outer peripheral portion of the overflow pipe so that the cleaning water having a relatively low temperature in the lower part of the inside of the cleaning tank whose lower end is opened is discharged to improve thermal efficiency. I was trying to improve.

[0007]

However, in the structure as disclosed in the above publication, the cleaning water in the lower part of the cleaning tank is discharged through the overflow pipe, which impairs the discharge of dirt from oil and fat and contains a large amount of detergent. Since the cleaning water is discharged, a relatively large amount of detergent is consumed, and there is a problem that the running cost rises on the contrary.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and it is possible to smoothly discharge the dirt of oil and fat in the cleaning tank and to reduce the cost in terms of heat and detergent. It is an object of the present invention to provide a dishwasher with a reduced size.

[0009]

DISCLOSURE OF THE INVENTION The dishwasher of the present invention comprises:
A washing chamber, a washing tank separated from the washing chamber by a bottom plate, a filter provided on a part of the bottom plate, and an overflow pipe that is erected upright corresponding to the bottom of the bottom plate other than this filter and opens in the washing tank. And a shielding plate for partitioning the relatively large area of the wash water around the overflow pipe and the wash water below the filter.

[0010]

According to the dishwasher of the present invention, the shielding plate separates the cleaning water surface around the overflow pipe from the cleaning water surface below the filter. Therefore, the cleaning water or the rinsing water flowing from the filter into the cleaning tank is used. The ripples on the water surface are blocked by the shield plate. As a result, ripples on the water surface around the overflow pipe are suppressed, and wasteful discharge of hot water from the overflow pipe is eliminated, and heat loss can be suppressed.

Further, the high-temperature rinse water flowing into the cleaning tank, passing through the surface of the cleaning water and directly directed to the overflow pipe is also shielded by the shield plate, and the rinse water always drops downward in the cleaning tank. Therefore, since the wash water having a relatively low temperature is discharged from the overflow pipe, the heat loss is reduced and the energy saving can be achieved.

In particular, since the shield plate separates the relatively large cleaning water surface around the overflow pipe from the cleaning water surface below the filter, there is little ripple around the overflow pipe, so that the oil and fat in the cleaning water can be smoothly contaminated. It will float on the surface of the washing water. Therefore, it is possible to smoothly discharge the dirt of the oil and fat while suppressing the outflow of the detergent component from the overflow pipe, and it is possible to improve the cleaning efficiency.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a vertical sectional front view of a dishwasher 1 of the present invention, FIG. 2 is a configuration diagram of the dishwasher 1 of the present invention, and FIG. 3 is a washing tank 12
It is an expansion vertical front view of the dishwasher 1 of a part. In each drawing, a washing chamber 3 is defined in the main body case 2 of the dishwasher 1, and the front surface of the washing chamber 3 is opened and closed by a door 8 (partially shown in FIG. 1). An upper washing nozzle 4 having a plurality of washing nozzle ports 4A for jetting washing water downward is rotatably arranged at an upper portion of the washing chamber 3.
An upper rinse nozzle 5 that rotates concentrically with the upper cleaning nozzle 4 is disposed slightly below the upper cleaning nozzle 4. The upper rinse nozzle 5 has a plurality of rinse nozzle ports 5A, ...

A lower cleaning nozzle 6 having a plurality of cleaning nozzle openings 6A for jetting cleaning water upward is rotatably arranged at the lower part of the cleaning chamber 3, and slightly above the lower cleaning nozzle 6. A lower rinsing nozzle 7 having a plurality of rinsing nozzle openings 7A for ejecting rinsing water upward is rotatably arranged concentrically with the lower rinsing nozzle 6. On the other hand, a bottom plate 9 is arranged below the cleaning chamber 3, and the bottom plate 9
A cleaning tank 12 is provided below the cleaning chamber 3 so as to be partitioned by. A part of the bottom plate 9 is cut out, and a filter 10 is attached to the bottom plate 9 from above so as to close the cutout part. This filter 10
An overflow pipe 13 is erected in the cleaning tank 12 located below the bottom plate 9 of the other parts, and is opened in the cleaning tank 12 at a position where the water surface W of the cleaning tank 12 is regulated to a predetermined water level. There is.

A shield plate 11 is attached to the lower surface of the bottom plate 9 between the overflow pipe 13 and the filter 10. The shielding plate 11 is attached to the lower surface of the bottom plate 9 over the entire width in the front-rear direction, protrudes from the bottom plate 9 into the cleaning tank 12 below, and its lower end is sufficiently above the bottom surface of the cleaning tank 12. The overflow pipe 1
3 extends below the upper end opening portion of 3. As a result, the shielding plate 11 completely separates the wash water surface W around the overflow pipe 13 from the wash water surface W below the filter 10. Especially, the washing water surface W around the overflow pipe 13
Is larger than the cleaning water surface W below the filter 10.

On the other hand, between the upper and lower cleaning nozzles 4 and 6 and the cleaning tank 12, cleaning water of about + 60 ° C. mixed with the detergent stored in the cleaning tank 12 is supplied through the cleaning pipe 18 to the upper and lower cleaning nozzles 4. A cleaning pump 14 for circulating the booster tank 15 is provided between the upper and lower rinsing nozzles 5 and 7 and the booster tank 15 arranged in parallel with the main body case 2.
A rinsing pump 16 is provided for feeding the rinsing water having a high temperature of about + 80 ° C. stored in the upper and lower rinsing nozzles 5 and 7 through the rinsing pipe 19. The overflow pipe 2 that regulates the predetermined water level is also included in the booster tank 15.
1 is provided upright, and a water supply valve 22 for controlling hot water supply from a water heater (not shown) to the booster tank 15 is further provided.

Next, the operation of the dishwasher 1 of the present invention having the above construction will be described. First, an object to be cleaned (not shown) made of dishes such as dishes is stored in the cleaning chamber 3 between the upper and lower rinsing nozzles 5 and 7 (upper and lower cleaning nozzles 4 and 6), and the cleaning operation is started.
In this cleaning operation, the cleaning water stored in the cleaning tank 12 by the operation of the cleaning pump 14 is replaced by the cleaning pipe 18
It is circulated to the upper and lower cleaning nozzles 4, 6.

The circulated washing water is jetted downward from the washing nozzle port 4A of the upper washing nozzle 4 and is jetted upward from the washing nozzle port of the lower washing nozzle 6 to be sprayed on the object to be washed. And a part of them becomes the rotational driving force of the upper and lower cleaning nozzles 4 and 6, so that the upper and lower cleaning nozzles 4 and 6 rotate. The sprayed cleaning water is the bottom plate 9
It is dripped on the top, collected through the filter 10 into the cleaning tank 12, and circulated again to the upper and lower cleaning nozzles 4 and 6.

[0019] During this cleaning operation, the residual food (which had adhered to the object to be cleaned) dropped along with the cleaning water is filtered out by the filter 10. Similarly, the oil and fat stains adhered to the object to be cleaned are It passes through the filter 10 in a state of being mixed with cleaning water and flows into the cleaning tank 12. When such a cleaning operation is performed for 90 seconds, for example, the cleaning pump 14 is stopped to stop the cleaning operation, and subsequently a rinsing operation for 10 seconds is started. In the rinsing operation, the rinsing pump 16 operates to feed the high-temperature (+ 80 ° C.) rinsing water in the booster tank 15 to the upper and lower rinsing nozzles 5 and 7 through the rinsing pipe 19. The fed rinse water is sprayed downward from the rinse nozzle port 5A of the upper rinse nozzle 5 and is sprayed upward from the rinse nozzle port of the lower rinse nozzle 7 and sprayed onto the object to be cleaned. At the same time, the upper and lower rinsing nozzles 5 and 7 rotate because a part of them becomes the rotational driving force of the upper and lower rinsing nozzles 5 and 7.

The sprayed rinse water similarly drops on the bottom plate 9, passes through the filter 10 and is collected in the cleaning tank 12. Further, since this rinse water is added to the wash water, the wash water surface W (water level) in the wash tank 12 rises. When the cleaning water surface W becomes higher than the upper end opening of the overflow pipe 13, the cleaning water in the water surface W portion flows into the overflow pipe 13 and is discharged to the outside. As a result, the water level in the cleaning tank 12 is regulated to a constant value.

During the cleaning / rinsing operation as described above,
The wash water surface W below the filter 10 is sharply undulated as shown in FIG. 3 by the wash water or rinse water flowing from above. However, since the cleaning water surface W below the filter 10 is completely separated from the cleaning water surface W around the overflow pipe 13 by the shielding plate 11 as described above, the ripples of the cleaning water surface W below the filter 10 are caused by the shielding plate. Blocked by 11.

Further, the shield plate 11 is the overflow pipe 13
Since the surrounding cleaning water surface W has a relatively wide area, the ripples of the cleaning water surface W around the overflow pipe 13 are suppressed, and the water surface becomes extremely gentle as shown in FIG. Therefore, wasteful discharge of hot water flowing into the overflow pipe 13 due to the undulation is prevented, and heat loss can be suppressed.

Further, during the above-mentioned rinsing operation, the washing tank 12
The high temperature rinsing water (containing dirt of oil and fat) that has flowed into the inside is blocked by the overflow pipe 13 and cannot go directly to the overflow pipe 13 side through the washing water surface. The water always drops once inside the cleaning tank 12, passes under the shield plate 11, and then flows into the overflow pipe 13 side. Therefore, the wash water having a relatively low temperature is discharged from the overflow pipe 13, so that the heat loss is reduced and the energy saving can be achieved.

Further, as described above, the cleaning water surface W around the overflow pipe 13 is gentle, and the shielding plate 11 has a relatively large surface area around the overflow water pipe 13. Contamination of oil and fat in the wash water flowing through to the overflow pipe 13 side rises to the wash water surface W around the overflow pipe 13 very smoothly. Therefore, during the rinsing operation, the oil and grease can be smoothly discharged from the overflow pipe 13,
At the same time, it is possible to suppress the outflow of the detergent component, so that it is possible to improve the cleaning efficiency and reduce the running cost.

[0025]

As described above in detail, according to the present invention, since the cleaning water surface around the overflow pipe and the cleaning water surface below the filter are separated by the shield plate, the cleaning water or the rinsing water flowing from the filter into the cleaning tank. Ripples on the surface of the washing water due to water are blocked by the shielding plate. As a result, ripples on the water surface around the overflow pipe are suppressed, and wasteful discharge of hot water from the overflow pipe is eliminated, and heat loss can be suppressed.

Further, the rinsing water having a high temperature which flows into the rinsing tank, passes through the surface of the rinsing water and goes directly to the overflow pipe is also blocked by the shielding plate, and the rinsing water always drops downward in the rinsing tank. Therefore, since the wash water having a relatively low temperature is discharged from the overflow pipe, the heat loss is reduced and the energy saving can be achieved.

In particular, since the shield plate separates the relatively large cleaning water surface around the overflow pipe from the cleaning water surface below the filter, there is little undulation around the overflow pipe, so that the oil and fat in the cleaning water can be smoothly contaminated. It will float on the surface of the washing water. Therefore, it is possible to smoothly discharge the dirt of the oil and fat while suppressing the outflow of the detergent component from the overflow pipe, and to improve the cleaning efficiency.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram of a dishwasher of the present invention.

FIG. 3 is an enlarged vertical sectional front view of a cleaning tank portion of the dishwasher of the present invention.

[Explanation of symbols]

 1 Dishwasher 3 Washing Room 4 Upper Washing Nozzle 5 Upper Rinse Nozzle 6 Lower Washing Nozzle 7 Lower Rinse Nozzle 9 Bottom Plate 10 Filter 11 Shielding Plate 12 Washing Tank 13 Overflow Pipe

Claims (1)

[Claims] 1. A cleaning chamber, a cleaning tank partitioned from the cleaning chamber by a bottom plate, a filter provided on a part of the bottom plate, and a filter provided upright corresponding to the bottom of the bottom plate other than the filter, A dishwasher comprising: an overflow pipe that opens into a washing tank; and a shield plate that partitions the wash water surface of a relatively large area around the overflow pipe and the wash water surface below the filter.