JPS59230530A - Ultrasonic tableware washer - 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 Application of the Invention] The present invention relates to an ultrasonic dishwasher9, and particularly to an ultrasonic dishwasher aimed at shortening cleaning time and reducing the amount of hot water used. BACKGROUND OF THE INVENTION In conventional ultrasonic cleaning type dishwashers, that is, ultrasonic dishwashers, the concentration of detergent (synthetic detergent containing enzymes that act on starch, that is, low-foaming dishwashing detergent) is reduced to 0. A cleaning tank filled with 40°C warm water with a concentration of .2% (
When a tableware with cooked rice attached and left indoors for 30 minutes is placed in a volume of warm water (approximately 3 ob), and irradiated with 24-28 kHz I:) ultrasonic waves at an intensity of approximately 0.7 W/cr/1. In this case, stains with a film of glue are removed in 6 to 12 minutes, and stains with particles of glue are removed in 18 to 25 minutes. The cooking oil is removed in about 10 minutes.

On the other hand, in a dishwasher that uses hot water jet cleaning, dishes that have cooked rice on them and have been left indoors for 30 minutes are placed in the washing tank.
40°C to 50° with the detergent concentration 02 to 0.5%
When cleaning with the water hammer action of hot water jet (circulating water volume: approx. 3), the dirt attached in the form of particles is
Although it can be removed in minutes, it takes 50 to 50 minutes to remove stains with a film of glue attached. The cooking oil is removed in about 10 minutes as in the ultrasonic dishwasher.

As described above, conventional hot water injection type dishwashers have a long cleaning time, while ultrasonic dishwashers have a short cleaning time but require a large amount of hot water. The object of the invention is to provide an ultrasonic dishwasher that can wash dishes in a short time without using a large amount of hot water by eliminating the drawbacks of the prior art described above. .

[Summary of the invention]

The configuration of the ultrasonic dishwasher according to the present invention includes: a diaphragm with an ultrasonic vibrator attached, which is fixed to the bottom of a cleaning tank that has a dish basket inside and stores cleaning water; A water level switch detects a low water level and a Takagi -1 level, and circulates the cleaning water in the cleaning tank. +in pump, a heater that can heat this washing water, and a part of the circulating washing water that is discharged toward the outer periphery of the dish basket so that the water impact force can rotate the dish basket. means for spraying the remainder of the circulating washing water toward the dishes; and means for first heating the washing water with the heater and spraying it onto the dishes under a low water level; A control circuit configured to excite the ultrasonic vibrator and transmit ultrasonic waves to the cleaning water in the cleaning tank under a high water level when the tank is filled with water at room temperature. It is.

More details are as follows.

In order to wash dishes in a short time without using large amounts of hot water, first wash dirty dishes with detergent and hot water jets to remove stains such as cooking oil and rice grains. Then, the cleaning tank is filled with room temperature water (tap water) and ultrasonic waves are applied to remove the remaining dirt such as cooked rice paste.

[Embodiments of the invention]

Hereinafter, the present invention will be explained by examples.

FIG. 1 is a longitudinal sectional view of an ultrasonic dishwasher according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the Al-A2 arrow in FIG. 1.
FIG. 3 is a plan view showing details of the support stand in FIG. 1.

In the figure, 1 is a washing tank that stores washing water 2 such as water or hot water and a dish basket 3 (details will be described later), 1a is a drain port integrally formed at the bottom of this washing tank 1, and 1b is a This is a discharge pipe that is formed on the wall of the cleaning tank 1 and discharges the cleaning water 2 fed from the pump 16 (details will be described later). 3 is the edge 4. Frame 5. This is a tableware basket that stores tableware, and the center of the bottom part 6 is rotatably supported by a support shaft 10 (described in detail later). The discharge pipe 1b is arranged so as to be located at or near the tangential neck of the frame 5 of the dish basket 3, and the water discharged from the discharge pipe 1b is transferred to the frame 5 of the dish basket 6. The tableware basket 3 is constructed so that the dish basket 3 can be rotated by the water impact force. Reference numeral 7 denotes a bearing that is fixed at the center of the bottom 6 of the tableware basket 6 and has a hole formed in the center into which the support shaft 1o is inserted. Reference numeral 8 indicates a tableware to be washed, which is held within the tableware basket 6 by a support rod 6a fixed to the bottom 6.

9 is a support stand installed close to the bottom surface of the cleaning tank 1, and 9a is its leg. Reference numeral 1o denotes a support shaft that is fixed at the center of the support stand 9, has a conical tip, fits into the hole of the bearing 7, and supports the dish basket 3. Reference numeral 11 denotes a diaphragm that is watertightly fixed to the bottom of the washing tank 1 so as to be offset from the center of rotation of the dish basket 3 so that ultrasonic waves can also be irradiated to the outer circumference of the dish basket 3. 12 is an ultrasonic vibrator (for example, a magnetostrictive vibrator, excitation frequency 28 kHz) which has a coil 16 wound around its leg portion 12a and is firmly adhered to the diaphragm 11. 14 is this ultrasonic vibrator 12
This is a high frequency power supply device for exciting. 15 is a motor that drives the pump 16, 15a is a shaft, and a 15 ha capacitor.

16 is a pipe portion 16c and 1 which become a water inlet or an outlet.
casing L6a having 6d in the tangential direction of the circumferential portion;
The pump is fixed to the shaft 15a of the motor 15 and includes an impeller 16b having blades on the outer periphery. The impeller 16b of this pump 16 rotates clockwise during the "washing" and "rinsing" steps in which the washing water 2 is circulated, and the impeller 16b rotates counterclockwise during the "draining" step. This is a strainer installed in 1a. 18 is
A drain pipe 19 communicates the pipe portion 16c of the pump 16 with the drain port 1a of the cleaning tank 1, and 19 is installed in the middle of this drain pipe D1B to pass water from the drain port 1a to the pipe portion 16C. This is a check valve 1 that prevents backflow from the portion 16c to the drain port 1a. 20 is a drain pipe F that communicates the pipe portion 16d of the pump 16 and the drain port 1a; 21 is installed in the middle of this drain pipe F2n to pass water from the drain port 1a;
This is a check valve■ that prevents backflow from the side. 22 is a discharge pipe 1b formed in the cleaning tank 1, and a shower jet port 25.
(Details will be described later) is a discharge pipe that communicates with the pipe portion 16c of the pump 16. 23 is a drain hose connected to the pipe portion 16d of the pump 16, 24 is a check valve installed in the middle of the drain hose 2; This prevents air from being sucked into the pump 16 during circulation. Z5 is provided with a plurality of small holes 25a, so that the water sprayed from these small holes 25a hits between the center and the outer periphery of the dish basket.
This is a shower nozzle installed at the upper edge of the cleaning tank 1.

A sheathed heater 26 is housed in a heater box 27 disposed in the middle of the discharge pipe 22 and is capable of heating cleaning water.

28 is a low water level switch that can detect the low water level R surface in the cleaning tank 1, and 29 is
This is a high water level switch related to a water level switch that can detect a high water level S surface.

30, a water supply hose 31 connected to a water faucet is a water supply valve;
52 is a water inlet 0 Next, the control circuit of the ultrasonic dishwasher according to FIG. 1 will be explained.

4 is a control circuit diagram of the ultrasonic dishwasher according to FIG. 1, and FIG. 5 is an operation diagram of the timer in FIG. 4.

In FIG. 4, the same parts as in FIG. 1 are denoted by the same numbers. The part surrounded by the two-dot chain line is a timer 63 configured to turn the cam switches (1) 35 to cam switches (6) 40 on and off by the timer motor 34.

The cam switch (1) 35 is a main switch. The cam switch (2) 56 is the hot water shear injection (1), (2)
The low water level switch 28 is energized during the shower injection (1) and (2) steps, and the high water level switch 2 is energized during the ultrasonic cleaning step.
9 is energized. The cam switch (3) 57 closes during the ultrasonic cleaning process and energizes the timer motor 64.

Cam switch (4) 38 and cam switch (5) 5
9H controls the motor 15, and communicates with c-a except for the drainage process, and the pump 16 is rotated clockwise.
In the drain stroke, electricity is applied to c-b to rotate the pump 16 counterclockwise. The cam switch (6) 40 is closed during the hot water shower injection (1) and (2) strokes, and the sheathed heater 26 is energized.

The operation of this embodiment configured as described above will be explained.

First, the cleaning operation will be explained. The dishes 8 are stored in the dish basket 3 in the washing tank 1, and detergent is added. Cam switch (1) 55' which is the main switch! When set to iON, the water supply valve 31 opens and water is supplied into the cleaning tank 1. In the hot water shower injection (1) process, when water is supplied to the cleaning tank 1 to the low water level R surface, the low water level switch 28 changes from c-nc to c-n.
motor 15 and sheathed heater 26
is energized to heat the washing water 2 (2 to sl in this embodiment), and at the same time, the dish basket 3 is rotated by the water flow discharged from the discharge pipe 1b, and hot water is jetted from the shower jet port 25 to wash the dishes 8. After the warm water shower injection (1) process is completed, the wash water 2 is drained from the drain hose 23 by the pump 16. Then, in the ultrasonic cleaning process, the cam switch (2)'56 is switched from ea to cb, the water supply valve 31 is opened, and tap water is supplied to the cleaning tank 1, and the high water level S surface (601 in this embodiment), the high water level switch 29 switches from c-nc to I:! -n O, the high-frequency power supply 14 and the motor 15 are energized, the high-frequency power supply [14 excites the ultrasonic vibrator 12, and the ultrasonic wave is emitted from the diaphragm 11 to the cleaning water 2. The pump 16 discharges and injects the washing water 2 from the discharge pipe 1b and the shower nozzle 25, rotates the tableware front 3, and performs ultrasonic cleaning - this washing water 2 is drained,
After that, according to the operation diagram shown in Fig. 5, tap water is filled up to the low water level R surface, and shower injections (1) and (2) are performed, and hot water shower injection (2) is performed by energizing the sheathed heater 26.
) is performed, and the cleaning of the tableware 8 is completed.

The ultrasonic dishwasher of this example described above washed dishes that had cooked rice on them and had been left indoors for 30 minutes. The heating process was carried out for 10 minutes (circulated hot water amount: 61. Detergent concentration n, s%), thereby removing most of the cooking oil and cooked rice grains, and then filling with tap water to the high water level S. Sonic cleaning process (ultrasonic strength is 0.
7 W/ci, frequency 2 kHz) for 5 to 7 minutes, all the film-like stains from rice grains and rice glue that were still attached to the dishes can be cleaned, and the cleaning time including the time to supply water can be The time was just under 20 minutes. In this way, compared to conventional ultrasonic dishwashers, the amount of hot water used was reduced to approximately 1,710 ml, and the cleaning time was also shortened.The reason for this is that before ultrasonic cleaning, hot water jetting, which is effective for removing grain stains, removes rice grains, etc. This is because the membrane stains could be removed in a short time by removing the particulate stains 7 and then performing effective surface ultrasonic cleaning on the membrane stains.

According to the embodiment described above, by cleaning in the hot water shower injection (1) process in which hot water is jetted while heating and circulating a small amount of cleaning water to which detergent has been added before ultrasonic cleaning, during the ultrasonic cleaning process, It has the effect of removing dirt from cooked rice in a short time without using hot water. Additionally, because no detergent is added during the ultrasonic cleaning process, less detergent is used compared to conventional ultrasonic dishwashers.Furthermore, the ultrasonic cleaning process not only removes dirt, but also rinses the dishwasher. In addition to being able to reduce the number of subsequent rinsing steps, there is also the effect of lower operating costs.

[Effects of the Invention] - As explained in detail above (C) According to the present invention, an ultrasonic dishwasher is proposed which can wash dishes in a short time without using a large amount of hot water. can do.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an ultrasonic dishwasher according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the Al-A2 arrow in FIG. 1.
FIG. 6 is a plan view showing details of the support stand in FIG. 1;
4 is a control circuit diagram of the ultrasonic dishwasher according to FIG. 1, and FIG. 5 is an operation diagram of the timer 2 in FIG. 4. 1...Cleaning tank 1b...Discharge pipe 2...
・Washing water 6... Before dishes 8... Tableware
11... Vibration plate 12... Ultrasonic vibrator 1
4... High frequency power supply device 16... Pump 2
2...Discharge pipe 25...Shower jet port 26...
Sheathed heater 28...low water level switch 29...high water level switch (also...low water level S...high water level Figure 1 +b +b (1rtlcL W 2212
Figure 3

Claims (1)

[Claims] 1. A diaphragm with an ultrasonic vibrator attached, which is fixed to the bottom of a cleaning tank that has a dish basket inside and stores cleaning water, and a low water level surface and a high water level surface in the cleaning tank. A water level switch to detect, a pump that circulates the washing water in the washing tank, a heater capable of heating the washing water, and a part of the circulating washing water directed toward the outer periphery of the dish basket. means for rotating the dish basket by impact force; means for spraying the remainder of the circulating washing water toward the dishes; and initially heating the washing water with the heater at a low water level. Then, the ultrasonic vibrator is excited to transmit ultrasonic waves to the washing water in the washing tank under a high water level filled with normal temperature water in the washing tank. An ultrasonic dishwasher characterized by comprising a control circuit as shown in FIG.