JP2000005125A - Dish washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To abolish the insertion work of a packing, eliminate unevenness in the insertion work and assembly work of the packing, and improve the reliability of a water sealing constituent part by forming a fitting part of a lid opening upward and a washing tank over the whole periphery into a labyrinth configuration. SOLUTION: A fitting part of an inner lid 4a opening upward and a washing tank 3 is formed into a labyrinth configuration having U-shaped groove parts 20a, 20b over its whole periphery. Consequently, injection water jetted from an injection arm nozzle during washing operation collides against an inner side of the fitting part of the washing tank 3 and the inner lid 4a, and washing water is reflected in a diffused manner and is absorbed in the groove parts 20a, 20b on a washing tank 3 side to prevent scattering of washing water to the outside of a dish washer. Moreover, at this time, the washing water entering the U-shaped groove parts 20a, 20b on the washing tank 3 side flows forward from a rear part of a the washer body along an inclination in the groove parts 20a, 20b to return the washing water into the washing tank 3 through opening parts 22a, 22b provided on an inner wall of the groove parts 20a, 20b like a labyrinth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher having a labyrinth configuration around a fitting portion between a lid that opens upward and a washing tank over the entire circumference.

[0002]

2. Description of the Related Art In a conventional dishwasher, as shown in FIG. 2, a fitting portion between a lid, which is pivotally supported at the rear of the washing tank and is openable and closable upward, and a washing tank, that is, water is provided. The sealing component has a U-shaped groove integrally formed over the entire periphery of the fitting portion on the cleaning tank side, and a water sealing packing is inserted into the groove. The packing and the ribs formed over the entire circumference of the lid that opens and closes upward have a certain interference, and are locked and fitted at the front surface of the lid.

[0003]

However, in these conventional methods, a fitting portion between a lid and a lid, which is openably and closably supported at the rear part of the cleaning tank and opens and closes upward, ie, a water seal structure is used. The parts need to be hermetically sealed by packing or the like, and the work of inserting this packing over the entire circumference of the cleaning tank occurs, resulting in a cost increase when assembling the parts.
In addition, it is difficult to secure and manage the reliability of the water seal component due to variations in packing insertion work and assembly work.

A fitting portion between a lid that opens and closes upward and a washing tank,
That is, the water sealing component is formed integrally with a U-shaped groove over the entire circumference of the fitting portion on the cleaning tank side, a packing for water sealing is inserted into this groove, and opens and closes upward with the packing. The ribs are formed over the entire circumference on the lid side to provide a certain amount of interference, and lock and fit at the front surface of the lid. Since the cover is closed, the operation force at the time of closing the lid is increased, and there is a possibility that usability may be deteriorated.

[0005] The packing and the ribs formed over the entire periphery of the lid that opens and closes upward have a certain interference, and the packing is pushed in and deformed to some extent to seal the water. There was a possibility of deformation due to compression set, deterioration with time, water leakage due to a decrease in interference due to inclination at the time of installation of the main body, and the like.

Accordingly, an object of the present invention is to solve these conventional drawbacks, and to form a labyrinth configuration around the entire circumference of the fitting portion between the lid that opens upward and the cleaning tank, and to form a labyrinth-like front part on the cleaning tank side. At the opening of the inner wall of the U-shaped groove, the washing water flowing forward of the main body through this groove is returned into the washing tank,
An object of the present invention is to prevent washing water from splashing outside the machine.

[0007]

As means for solving the above problems, a labyrinth structure is provided around the entire circumference of the fitting portion between the lid that opens upward and the cleaning tank, and a labyrinth-shaped front part on the cleaning tank side. At the opening of the inner wall of the U-shaped groove, the washing water flowing through the groove and forward of the main body is returned to the washing tank to prevent the washing water from scattering outside the machine.

That is, the function of the present invention is to form a U-shaped groove in a labyrinth around a fitting portion between a lid which is openably and closably supported at a rear portion of the cleaning tank and which opens upward and a cleaning tank. An opening is provided in the inner wall of the labyrinth-shaped U-shaped groove at the front part of the cleaning tank side, and during the cleaning operation, the cleaning water sprayed from the arm nozzle is fitted to the lid that opens upward and the cleaning tank. In the joining portion, the irregularly reflected and absorbed by the labyrinth-shaped U-shaped groove portion of the fitting portion prevents the washing water from directly scattering outside the machine. Further, the washing water that has been irregularly reflected and absorbed by the labyrinth-shaped U-shaped groove portion of the fitting portion is washed to the front of the main body through the groove portion because the U-shaped groove portion is inclined forward of the main body. The structure is such that water is guided and washing water is returned into the washing tank through an opening provided in the inner wall of the U-shaped groove at the front part on the washing tank side.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

The dishwasher 1 has a box-shaped outer frame 2. A cleaning tank 3 is disposed in the outer frame 2, and a lid 4 that opens and closes upward is provided on an upper surface thereof. The lid 4 is composed of a rinsing lid 4a on the cleaning tank side and a lid cover 4b on the appearance. In the washing tank 3, a detachable tableware basket 5 is stored. A cleaning pump 7 is provided on the rear side of the bottom of the cleaning tank 3.
Is arranged. Immediately below the tableware basket 5, an injection arm nozzle 6 that rotates in a horizontal plane with the center as a fulcrum is arranged. A plurality of small holes 8 are provided on the upper surface of the injection arm nozzle 6. In the base 16 at the bottom of the washing tank 3, a heater bum is disposed. A front cover 9 is mounted on the front surface of the cleaning tank 3, and a controller 10 for controlling each electric component is mounted on the front cover 9.

Next, the washing, rinsing and drying operations of the dishwasher 1 will be described. First, in the cleaning operation, the water supply electromagnetic valve 11 is energized, and when the water supply reaches a predetermined water level, the water supply electromagnetic valve 11 closes, the cleaning water is supplied to the cleaning tank 3, and the energization of the hot-tub kumi and the cleaning pump motor is started. You. By the operation of the cleaning pump motor, the cleaning pump 7 operates to draw water from the water retaining portion 12 arranged at the bottom of the cleaning tank 3, and from the pump discharge port to the injection arm nozzle 6 and the water supply pipe 13.
Pressure water is supplied to the water spray pipe 13 from the water supply pipe 13. By directly injecting the pressurized water from the hole of the ejection arm nozzle 6 into the tableware basket 5 above, dirt adhering to the tableware is peeled and dispersed to perform washing. At this time, the injection arm nozzle 6 rotates and injects pressure water over the entire circumference. After cleaning for a certain period of time, the power supply to the cleaning pump motor and heater heater is stopped to terminate the cleaning, and the drain pump 7 is energized to discharge the cleaning water in the cleaning tank 3 out of the machine. Next, the rinsing operation is performed several times in the same operation as the above-described cleaning operation. Next, in the drying operation, the blower motor is energized, the blower fan 16 is rotated, and air is supplied into the washing tank 3 through the blower motor, heater heater, and blower outlet arranged at the outer bottom of the washing tank 3. At this time, the heater sets the constant energizing time to O.
N, OFF, and cool air is turned to warm air. With this warm air, water droplets and residual water adhering to the washing tank 3 and water droplets adhering to tableware stored in the tableware basket 5 are converted into steam and discharged out of the machine through the exhaust port 15. Is done. After a certain time, the drying operation ends and the operation of the dishwasher 1 ends.

Next, the contents of the present invention will be described. As shown in FIG. 2, the conventional structure is a fitting portion between the cleaning tank 3 and a lip lid 4a of a lid 4 which is pivotally supported at the rear part of the cleaning tank 3 and which opens and closes upward, that is, a water seal. The component part is formed integrally with a U-shaped groove portion 18 over the entire circumference of the fitting portion on the cleaning tank 3 side, and a water seal 19 is inserted into the groove portion 18 and opened and closed upward with the packing 19. With the ribs 17 formed over the entire circumference of the uchifuta 4a side, a certain interference is provided, and locking and fitting are performed at the front surface of the lid 4. Here, in the present invention,
As shown in FIG. 3A, the uchifuta 4a opening upward.
A labyrinth configuration having U-shaped grooves 20a and 20b over the entire periphery of the fitting portion between the and the cleaning tank 3 is provided.

As a result, during the cleaning operation, the jet water jetted from the jet arm nozzle 6 is supplied to the cleaning tank and the uchifuta 4a.
And the U-shaped groove 20 on the side of the washing tank 3
The washing water is irregularly reflected and absorbed in the insides a and 20b and the ribs 21a and 21b of the uchifuta, thereby preventing the washing water from scattering outside the machine. At this time, the U-shaped groove 2 on the cleaning tank 3 side is used.
The washing water that has entered the cleaning tanks 0a and 20b flows along the U-shaped grooves 20a and 20b of the washing tank 3 along the slope from the rear to the front of the main body, and is guided to the front of the main body, as shown in FIG. ,
Labyrinth-like grooves 20a, 20b at the front part on the cleaning tank 3 side
The cleaning water is returned to the cleaning tank 3 through the openings 22a and 22b provided in the inner wall of the cleaning tank.

Thus, the U-shaped groove 18 of the cleaning tank 3 is formed.
The operation of inserting the packing 19 over the entire circumference can be eliminated, the dispersion of the packing inserting operation and the assembling operation can be eliminated, and the reliability of the water sealing component can be improved. Further, by eliminating the packing 19, the packing can be pushed in and deformed to some extent, thereby reducing the operating force at the time of opening and closing the lid as compared with the conventional method of closing the lid, and improving the usability.

Further, in the conventional configuration in which the packing is pushed in to some extent and deformed by giving a certain interference, the packing is deformed due to compression set, deteriorates with time, and the inclination when the main body is installed. There was a possibility of water leakage or the like due to a reduction in the interference due to the above, but this can be prevented, and the reliability of the water seal component is improved.

In addition, in order to prevent steam leakage during the cleaning operation and the drying process, the clearance of the labyrinth component is adjusted and the cleaning tank 3 is used.
This can be prevented by adjusting the number of U-shaped grooves, and air can be exhausted from the set exhaust port. Further, as a more effective method against this steam leakage, during the washing operation and the drying process, the steam in the washing tank 3 is forcibly sucked by the fan motor and exhausted from the set exhaust port. It is possible to cope with such a configuration.

[0017]

As described above, according to the present invention, the operation of inserting the packing over the entire circumference of the U-shaped groove of the cleaning tank can be eliminated, and the operation of inserting the packing and the assembling work vary. And the reliability of the water seal component can be improved. In addition, by eliminating the packing, the packing is pushed in and deformed to some extent, so that the operation force at the time of opening and closing the lid can be reduced as compared with the conventional method of closing the lid, and the usability can be improved.

Further, in the conventional configuration in which a certain interference is provided, and the packing is pushed in and deformed to some extent, the packing is water-sealed. In the conventional structure, the packing is deformed due to compression set, deteriorates with time, and the inclination when the main body is installed. Although there was a possibility of water leakage due to a decrease in the interference due to the above, this can be prevented, and the reliability of the water seal component is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dishwasher.

FIG. 2 is a longitudinal sectional view of a water sealing component of a conventional dishwasher according to an embodiment of the present invention.

FIGS. 3 (a) and (b) are vertical sectional views of a side surface of a water seal component main body showing an embodiment of the present invention and washing water in front of the water seal component main body showing an embodiment of the present invention. FIG. 3 is a vertical cross-sectional view with an opening returning to the inside of the tank.

[Explanation of symbols]

3 cleaning tank, 4 lid, 4a uchifita, 5 tableware basket, 6 injection arm nozzle, 17 uchifuta rib, 1
8: U-shaped groove of cleaning tank, 19: water seal packing, 22
a, 22b: Opening of the groove of the cleaning tank.

Continued on the front page (72) Inventor Takashi Tomita 1-1-1, Higashitagacho, Hitachi City, Ibaraki Prefecture F-term (reference) 3B082 BB02

Claims (3)

[Claims] 1. A washing tank having a lid that opens and closes upward and containing tableware therein, a rotatable arm nozzle provided below the washing tank and having a sprinkling port that opens diagonally upward, A dishwasher for washing and rinsing dishes, having a washing pump for supplying pressurized washing water in the washing tank to the arm nozzle and for jetting water in the washing tank from the arm nozzle;
A dishwasher characterized in that a labyrinth configuration is formed over the entire periphery of the fitting portion between the lid that opens upward and the washing tank. 2. The dishwasher according to claim 1, wherein both a lid that opens and closes upward and a fitting portion of the washing tank are inclined forward of the main body. 3. The dishwasher according to claim 1, wherein, at a fitting portion between the lid that opens and closes upward and the washing tank, a labyrinth-shaped U-shaped groove inner wall at a washing tank side front portion passes through the groove and forwards of the main body. A dishwasher provided with an opening for returning washing water flowing into the washing tank.