JP2574450B2 - Dishwasher - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher having a washing water injection port for spraying washing water for washing tableware and an ultrasonic vibrator, and a method of operating the same. is there.

2. Description of the Related Art A schematic structure of a conventional dishwasher will be described with reference to FIG. A washing tank 2 is disposed inside a main body 1 of a dishwasher, and a washing pump 4 that is driven to rotate by a motor 3 is fixed below the washing tank 2. The washing tank 2 is provided with a rotary arm nozzle 5 for jetting the washing water pumped by the washing pump 4, a heater 6 for warming the washing water, and a tableware basket 8 for accommodating tableware 7. Reference numeral 7 denotes a mechanism in which cleaning water rushed from the rotary arm nozzle 5 collides and is cleaned.

Then, the operation method of the conventional dishwasher will be described. First, in a washing process, a detergent is manually or automatically supplied, and after a certain level of water is supplied, the motor 3 and the heater 6 are energized to rotate the washing water while warming the washing water. Washing is performed by injecting washing water from the arm nozzle 5 to the tableware 7. When the washing step is completed, the washing water is discharged to the outside of the machine and the operation proceeds to the rinsing step. The rinsing step is usually repeated several times. Is going.

Problems to be Solved by the Invention However, in such a structure or operation method, the force for cleaning the tableware 7 is only the collision force of the cleaning water injected from the rotary arm nozzle 5, and the granular Although relatively effective against dirt, it is not effective in a short time with respect to dirt adhered in a thin film form, requiring long-term cleaning.

Further, the discharge pressure of the cleaning water injected from the rotary arm nozzle 5 is conventionally used in the range of 1.5 to 3 m in height of a water column, but in order to improve the cleaning effect, the discharge pressure of the cleaning water is increased. Then, the noise of the motor 3 and the cleaning pump 4 or the noise of the cleaning water colliding with the tableware 7 and the cleaning layer 2 increases, resulting in an increase in noise.

SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is to provide a dishwasher capable of reducing noise in a washing process without significantly changing the configuration and usability of a conventional dishwasher, and enabling efficient and short-time washing. And

A second object is to make cleaning simple and efficient, to enable short-time cleaning, and to reduce noise.

A third object is to perform efficient cleaning and reduce the time spent in the cleaning process.

Means for Solving the Problems And a first means of the present invention for achieving the first object is a washing tank, a washing pump, and a plurality of jets of washing water pressurized by the washing pump. A rotating arm nozzle having a plurality of washing water jets, and an ultrasonic vibrator disposed in a washing water flow path below the washing water jet of the rotating arm nozzle, and washing water jetted from the washing water jet. The discharge pressure of the washing water is set to the height of a water column, and is substantially equal to the distance from the washing water injection port to the top surface of the washing tank.

Further, a second means of the present invention for achieving the second object is provided with a cleaning layer, a cleaning pump, and a cleaning pump disposed at the bottom of the cleaning tank and injecting cleaning water pressurized by the cleaning pump. A plurality of washing water jets to be provided, an ultrasonic vibrator provided in the washing water flow passage leading to the washing water jet, and a rotatable tableware basket provided above the washing water jet, comprising: The discharge pressure of the washing water to be sprayed is set to be equal to the distance from the washing water injection port to the top surface of the washing tank with the height of the water column.

Further, a third means for achieving the third object is:
A step of atomizing the cleaning water by the vibration of the ultrasonic vibrator was provided before the cleaning step.

In the first means of the present invention described above, the washing water injected from the washing water injection port of the rotary arm nozzle is ultrasonically vibrated at a frequency of several tens of kHz or more by the above configuration, and the force received by the tableware Will also receive the force of water collision and the force of ultrasonic waves of water, that is, the force of water acceleration and the force of cavitation, and it will be possible to wash thin film-like dirt attached to tableware in a short time, Even if the discharge pressure of the washing water is lowered to the height of the water column to almost the same as the distance from the washing water injection port to the top of the washing tank, sufficient washing can be performed, and operation noise can be reduced by reducing the discharge pressure. Things.

In the second means, the rotatingly driven tableware is efficiently washed for a short time by receiving the collision force of water and the force of the ultrasonic wave of water. Even when the height of the water column is lowered to a position almost equal to the distance from the cleaning water injection port to the top surface of the cleaning tank, cleaning can be sufficiently performed, and operation noise can be reduced by reducing the discharge pressure.

Further, in the third means, since a step of atomizing the cleaning water by the vibration of the ultrasonic vibrator is provided before the cleaning step, the tableware on which dirt is adhered is washed with the preliminarily atomized cleaning water. Without washing, the same effect as immersion in washing water is exhibited, and the washing step performed later can be shortened.

First Embodiment First, a first embodiment of the present invention will be described with reference to FIG. 1 and FIG. Since the overall schematic structure is the same as that of the related art, a description thereof will be omitted. In the figure, reference numeral 9 denotes a rotary arm nozzle arranged in a cleaning tank 10 and the inside thereof is divided into upper and lower two stages. The washing water flow path 11 through which washing water flows in the upper stage
A plurality of washing water injection ports 12 are provided in an upper part, and an ultrasonic transducer 13 is provided in a lower part thereof so as to be opposed to each other. The lower row is the lead wire of the ultrasonic transducer 13
14 is kept watertight as a space for wiring. A cleaning pump 15 is disposed below the cleaning tank 10 and communicates with the cleaning water flow path 11 of the rotary arm nozzle 9. Then, the lead wire 14 of each ultrasonic transducer 13 is connected to the oscillation device 17 through the sliding contact 16.
Is connected to

When the cleaning pump 15 is operated in such a configuration, the rotating arm nozzle 9 rotates while spraying the cleaning water, and causes the cleaning water to collide with the tableware. When the ultrasonic vibrator 13 is vibrated by the oscillation device 17, the ultrasonic vibrator 13 and the cleaning water
Are located at opposing positions, the washing water injected from the washing water injection port 12 efficiently exhibits ultrasonic vibration, and the tableware is affected not only by the collision force of water but also by the ultrasonic force of water, that is, the acceleration of water. You will also receive power and cavitation. Therefore, thin film-like dirt attached to tableware can be cleaned in a short time, and efficient cleaning can be performed, so that the cleaning time can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. A washing tank 19 is arranged inside a main body 18 of the dishwasher, and a plurality of washing water injection ports 20 are provided at the bottom thereof. Cleaning tank
The washing water is sent from 19 to a washing pump 21 and is jetted from a washing water jet 20 through a washing water flow path 22. An ultrasonic vibrator 23 is attached to the lower part of the washing water flow path 22 at a position opposite to the washing water injection port 20, and is connected to an oscillation device 24. Reference numeral 25 denotes a heater for warming the washing water, and reference numeral 26 denotes a tableware basket for storing tableware 27, which is configured to be rotationally driven by a motor.

When the ultrasonic vibrator 23 is vibrated by the oscillating device 24 in such a configuration, the washing water jet 20
The washing water that is sprayed out exhibits ultrasonic vibration,
27 receives not only the impact force of water but also the force of ultrasonic waves of water, that is, the force of water acceleration and the force of cavitation. Since the cleaning water is jetted from the fixed cleaning water jet 20, the water flow becomes a steady flow, and the water flow generates more stable and strong ultrasonic vibration as compared with the first means. Therefore, it is possible to wash the thin film-like dirt attached to the tableware 27 in a shorter time, and the tableware basket 26 is also rotated by the motor 28, so that efficient cleaning can be performed, and the cleaning time is further improved. Shortening can be achieved.

Next, in the third embodiment of the present invention, the discharge pressure of the washing water jetted from the washing water jet in the first and second means is set to the height of the water column from the washing water jet to the top of the washing tank. , And will be described with reference to FIGS. 1 and 2. As described in the first means, the cleaning water injected from the cleaning water injection port 12 efficiently exhibits ultrasonic vibration, and the cleaning property is remarkably improved, so that the height of the water column is 1.5 to 3 m. Even if the conventional discharge pressure is lowered, washing can be sufficiently performed as long as the washing water reaches the tableware. In the third means of the present invention, the cleaning water jet 12
Since the discharge pressure of the wash water to be sprayed is set to the height of the water column and is substantially equal to the distance from the wash water injection port 12 to the top of the wash tank 10, the wash water always reaches the dishes,
Cleaning can be sufficiently performed at the discharge pressure. The distance from the washing water injection port 12 to the top surface of the washing tank 10 in a normal dishwasher is at most about 0.3 to 0.6 m, and the discharge pressure can be reduced to this extent. The noise or the sound of the washing water colliding with the tableware or the washing tank 10 is reduced, and the noise can be reduced without impairing the washing effect. Also cleaning pump 15
The required capacity and the amount of water used are also reduced, so that it is possible to save power and water, and also to reduce the cost.

Next, in a fourth embodiment of the present invention, a step of atomizing the cleaning water by the vibration of the ultrasonic vibrator is provided before the cleaning step which is normally performed, and referring to the structure in FIG. explain. First, water is supplied to such an extent that the ultrasonic vibrator 23 is immersed in the cleaning tank 19, and a detergent is introduced. Next, when the ultrasonic oscillator 23 is vibrated by the oscillation device 24, the cleaning water containing the detergent starts to atomize due to the ultrasonic vibration. Then, the atomized cleaning water reaches the cleaning tank 19 from the cleaning water injection port 20 and completely covers the dishware 27 with dirt. As a result, the tableware 27 is in the same state as immersed in the washing water,
Most of the dirt attached to 27 swells or dissolves in the washing water containing the detergent. If this atomization step is performed in advance and a normal cleaning step is performed after a while, the dirt adhering to the tableware 27 has begun to swell or dissolve and can be easily and quickly cleaned.

Conventionally, there is a thing that pre-washes using steam,
In this case, the effect is weak because the detergent does not atomize. However, in the fourth means of the present invention, since the cleaning water containing the detergent is directly atomized by the ultrasonic vibration, the detergent is also jetted at the same time as the water, so that the effect is further increased.

Effect of the Invention As described above, the first means of the present invention is one in which an ultrasonic vibrator is disposed in the cleaning water flow path below the cleaning water injection port of the rotary arm nozzle. Wash water sprayed on tableware efficiently exhibits ultrasonic vibration, and the force received by the tableware is not only the impact force of water but also the force of ultrasonic waves of water, so dirt attached to tableware can be efficiently removed in a short time. The cleaning can be performed, and the cleaning time can be reduced without significantly changing the structure and the usability of the conventional apparatus.

Further, the second means of the present invention is such that the washing water jet is disposed at the bottom of the washing tank, the ultrasonic vibrator is provided in the washing water flow path below the washing water jet, and the dish basket provided above the jet is provided. , So that simplification can be achieved especially in terms of the electrical configuration, and at the same time, the washing water is injected from the fixed washing water jet, and the water flow becomes a steady flow. Therefore, stable and strong ultrasonic vibration can be generated. Therefore, it is possible to wash the thin film-like dirt attached to the tableware in a shorter time, and the tableware basket is also rotated so that efficient cleaning can be performed, thereby further shortening the cleaning time. Can be done. Further, the first and second means make the discharge pressure of the washing water injected from the washing water injection port substantially equal to the distance from the washing water injection port to the top of the washing tank by setting the height of the water column to the tableware. Means that the washing water always arrives.By lowering the discharge power, the noise of the motor and the washing pump or the sound of the washing water colliding with the dishes and washing tanks is reduced, and the noise is reduced without impairing the washing effect. Can be planned. In addition, the required capacity of the washing pump is reduced, and the amount of water used is reduced, so that it is possible to reduce power consumption and water consumption, and also to reduce costs.

In the third means of the present invention, the step of atomizing the cleaning water by the vibration of the ultrasonic vibrator is performed before the cleaning step. Therefore, the dishes with dirt are completely washed with the cleaning water containing the detergent in advance. The cover can be covered evenly, so that the same effect as when immersed in the cleaning water is exerted, and the cleaning step performed later can be completed in a short time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a partial structure of a dishwasher according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of a main part of the dishwasher, and FIG. FIG. 4 is a sectional view showing a schematic structure of a dishwasher according to a second embodiment of the present invention, and FIG. 4 is a sectional view showing a schematic structure of a conventional dishwasher. 9 Rotating arm nozzle, 10, 19 Cleaning tank, 11, 22
Cleaning water flow path, 12,20 ... Washing water injection port, 13,23 ... Ultrasonic vibrator, 15,21 ... Washing pump, 17,24 ... Oscillator, 26
…… a tableware basket.

Claims (3)

(57) [Claims] 1. A washing tank, a washing pump, a rotating arm nozzle having a plurality of washing water jets for jetting washing water pressurized by the washing pump, and a washing water jet of the rotating arm nozzle. An ultrasonic vibrator disposed in the lower washing water flow path, the discharge pressure of the washing water injected from the washing water injection port, the height of the water column from the washing water injection port to the cleaning tank top surface Dishwasher almost equal in distance. 2. A washing tank, a washing pump, a plurality of washing water jets disposed at a bottom of the washing tank, for jetting washing water pressurized by the washing pump, and a cleaning water jet. An ultrasonic vibrator provided in the washing water flow path, and a rotatable tableware basket provided above the washing water injection port, the discharge pressure of the washing water injected from the washing water injection port is set to the height of the water column. A dishwasher in which the distance from the washing water jet to the top of the washing tank is substantially equal. 3. The dishwasher according to claim 1, further comprising a step of atomizing the washing water by vibration of the ultrasonic vibrator before the washing step.