JP2007117315A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher which can discharge water containing fine air bubbles, having fine air bubbles, into a washing tub, efficiently perform washing or rinsing, make the inside of piping through which the water or a washing liquid flows clean, and in addition, can suppress noises. <P>SOLUTION: This dishwasher discharges water by a water discharging means 9 toward tableware being housed in the washing tub 3. The dishwasher is equipped with a fine air bubble generating device 14 which generates fine air bubbles having a diameter of 0.1 to 1,000 μm in the water which is discharged into the washing tub 3 by the water discharging means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dishwasher.

  A general dishwasher is equipped with a washing tub for storing dishes and a water discharge means for discharging a cleaning liquid composed of water containing water and detergent into the washing tank, and the water and the cleaning liquid are discharged into the washing tank by the water discharge means. Thus, the main cleaning is performed by applying the cleaning liquid to the tableware stored in the cleaning tank, or the rinsing cleaning is performed by applying water to the tableware (see, for example, Patent Document 1).

However, the above dishwasher simply cleans dishes using only the cleaning ability of the cleaning liquid and the discharge pressure of the cleaning liquid, and cannot effectively use the cleaning capacity of the cleaning liquid. Cannot be washed. Furthermore, even if the cleaning liquid is discharged into the cleaning tank and then rinsed by applying water to the tableware in the cleaning tank, the tableware cannot be efficiently rinsed and the amount of water used increases. Furthermore, pipes through which water and cleaning liquid flow are difficult to clean and easily cause dirt and slimming, but dirt and slimming cannot be effectively removed by simply flowing the cleaning liquid into the pipe. Also, noise is generated when water or cleaning liquid strikes the tableware vigorously or when water or cleaning liquid is passed through the pipe.
JP 2005-237405 A

  The present invention has been invented in view of the above-described conventional problems, and is capable of discharging fine bubble-containing water having fine bubbles into a cleaning tank, performing main cleaning and rinsing efficiently, and piping through which water and cleaning liquid flow. An object of the present invention is to provide a dishwasher that can clean the interior and suppress noise.

  In order to solve the above-mentioned problems, the dishwasher according to the present invention is a dishwasher for washing dishes by discharging water toward the tableware stored in the washing tub 3 by the water discharge means 9. It is characterized by comprising a fine bubble generating device 14 for generating fine bubbles having a diameter of 0.1 to 1000 μm in the water discharged into the cleaning tank 3.

  By the said structure, the fine bubble containing water containing a very small bubble with a diameter of 0.1-1000 micrometers can be applied to tableware, and the main washing | cleaning and rinsing washing | cleaning of tableware can be performed effectively by the effect | action of a fine bubble. Moreover, the sound generated when the water containing fine bubbles collides with the tableware or flows through the piping can be reduced by the elasticity of the fine bubbles. Further, dirt and slime in the pipe through which the water containing fine bubbles flows can be effectively removed by the action of the fine bubbles.

  It is also preferable to include a bubble diameter adjusting means 37 that adjusts the diameter of the bubbles generated by the fine bubble generator 14. In this case, it is possible to effectively remove tableware stains or rinse while appropriately changing the diameter of the bubbles generated by the fine bubble generator 14.

  Moreover, it is also preferable to provide a useful component imparting means for imparting a useful component useful for washing dishes to the fine bubble-containing water. In this case, it is possible to more effectively wash and rinse the tableware with the useful components.

  Further, the fine bubble generator 14 generates fine bubbles in a cleaning liquid made of water containing a detergent, and the fine bubble-containing water made of the cleaning liquid that has generated the fine bubbles is discharged into the cleaning tub 3 to prepare the dishes. It is also preferable to provide a main cleaning mode for cleaning. In this case, the stain | pollution | contamination adhering to tableware by the effect | action of a fine bubble can be removed effectively.

  Further, the fine bubble generating device 14 generates fine bubbles in water, and a main cleaning mode in which a cleaning liquid made of water containing a detergent is discharged into the cleaning tank 3, and fine bubbles made of water in which the fine bubbles are generated. It is also preferable to provide a rinse cleaning mode in which the contained water is discharged into the cleaning tank 3.

  In this case, the tableware can be effectively rinsed by the action of the fine bubbles.

  In the present invention, fine bubble-containing water having fine bubbles can be discharged into the cleaning tank, the main cleaning and the excessive cleaning can be performed efficiently, the inside of the pipe through which water and cleaning liquid flow can be cleaned, and noise can be suppressed.

  The dishwasher of this embodiment shown in FIG. 1 and FIG. The cleaning tank 3 includes a tank body 1 having an open front surface, and a door 2 that closes the front opening of the tank body 1 so as to be freely opened and closed. A plurality of cupboards 4 or tableware baskets are provided in the washing tub 3, and the tableware can be stored side by side in the washing tub 3 by placing the tableware in the cupboard 4 or the tableware basket.

  The dishwasher includes water supply means constituted by a water supply path 5 connected to a water pipe, and drainage means constituted by a drainage path 6 and a drainage pump 7 provided in the drainage path 6. The downstream end of the water supply path 5 is connected to the cleaning tank 3, and the supply and stop of water into the cleaning tank 3 can be switched by opening and closing a water supply valve 8 provided in the water supply path 5. One end of the drainage channel 6 is connected to the bottom of the tank body 1 and the other end communicates with a drain trap (not shown) provided in the sink of the cooking table. The water accumulated at the bottom can be discharged to the outside through a drain trap. Note that the water supplied from the water supply channel 5 into the cleaning tank 3 may be switched between cold water and hot water.

  The dishwasher is provided with water discharge means 9 for discharging water toward the tableware stored in the washing tank 3. The water discharge means 9 includes an injection nozzle 10 provided at the bottom of the tank body 1, a circulation path 12 having one end connected to the bottom of the tank body 1 and the other end connected to the injection unit 11 provided with the injection nozzle 10. A circulation pump 13 provided in the middle of the circulation path 12 is provided. The water discharge means 9 operates the circulation pump 13 to cause water accumulated at the bottom of the tank body 1 to flow into the circulation path 12 and to flow into the injection nozzle 10 of the injection unit 11 via the circulation pump 13. This water is branched in the injection nozzle 10 and discharged from a large number of injection ports (not shown) provided on the upper surface of the injection nozzle 10 toward the tableware in the cleaning tank 3. Water is circulated through circuit 12. The injection nozzle 10 is rotatable in the circumferential direction, and can be injected into the cleaning tank 3 from a large number of injection ports as indicated by arrows A in FIGS. 1 and 2 while rotating in the circumferential direction.

  The dishwasher is provided with a fine bubble generating device 14 for generating fine bubbles having a diameter of 0.1 to 1000 μm (preferably 200 μm or less) in the water discharged into the washing tank 3 by the water discharge means 9.

  The fine bubble generating device 14 includes a gas mixing unit 15 that mixes gas with water discharged into the cleaning tank 3 by the water discharge means 9 to obtain gas mixed water, and makes the gas contained in the gas mixed water into fine bubbles. is there. Examples of the method for making the gas contained in the gas-mixed water into fine bubbles include a pressure dissolution method, a shearing method, and a method using these in combination. In the pressure dissolution method, the gas contained in the gas mixed water is sufficiently dissolved by pressurization, and the water in which the gas is sufficiently dissolved (gas dissolved water) is decompressed to precipitate the dissolved gas, resulting in fine bubbles. Is generated. The shearing method shears the gas contained in the gas mixed water to generate fine bubbles.

  FIG. 1 shows an example of the fine bubble generator 14. The fine bubble generating device 14 of this example generates fine bubbles by using both the pressure dissolution method and the shearing method. The fine bubble generator 14 includes a gas mixing unit 15, a circulation pump 13, a dissolution unit 16, and a precipitation unit 17 that are provided in the circulation path 12 in order from the upstream side.

  The gas mixing unit 15 is configured by connecting the other end of the gas supply path 18 opened to the atmosphere with one end as a gas inlet 38 to the upstream side of the circulation pump 13 in the circulation path 12. The gas mixing unit 15 draws air from the gas introduction port 38 into the circulation path 12 due to an ejector effect generated by operating the circulation pump 13 and flowing water through the circulation path 12, and thereby gas flows into the water flowing through the circulation path 12. Are mixed to obtain gas mixed water. The gas supply path 18 is provided with a check valve 19 for preventing a back flow of water.

  The dissolution unit 16 includes a dissolution tank 20 that sufficiently dissolves the gas in the gas mixed water fed from the circulation pump 13 in water under a high-pressure environment to obtain gas-dissolved water. As shown in FIG. 3, an injection port 21 connected to the upstream circulation path 12 is provided in the upper part of the dissolution tank 20, and a discharge port 22 connected to the downstream circulation path 12 is provided in the lower part. Yes. In the dissolution tank 20, the gas mixed water pumped from the circulation pump 13 is injected into the dissolution tank 20 through the injection port 21 to stir the water in the dissolution tank 20, and thereby gas is generated in a high-pressure environment by the circulation pump 13. Dissolve sufficiently in water to obtain gas-dissolved water. 3 is an air vent valve provided in the upper part of the dissolution tank 20, and the excess gas accumulated in the upper part of the dissolution tank 20 is discharged by the air vent valve 23 to keep the water level in the dissolution tank 20 constant. ing.

  The precipitation part 17 shown in FIG. 4 consists of the fine bubble generation nozzle 24 which precipitates the gas in the gas dissolution water obtained in the melt | dissolution part 16, and produces | generates a fine bubble, and obtains fine bubble containing water.

  In order from the upstream side to the fine bubble generating nozzle 24, an upstream flow path 25, an annular or radial small diameter path 26 communicating with the outer periphery of the downstream end of the upstream flow path 25, and an annular eddy current generation communicating with the outer periphery of the small diameter path 26 A downstream channel 28 communicating with the section 27 and the vortex generator 27 is provided. The water flowing from the upstream flow path 25 to the small-diameter path 26 has its pressure abruptly reduced, whereby the gas-dissolved water is depressurized, and the gas is precipitated from the gas-dissolved water as fine bubbles. In addition, the vortex generator 27 generates a vortex and allows only fine bubbles with a relatively small bubble diameter to flow through the downstream channel 28. Specifically, a vortex as indicated by an arrow A is generated in the vortex generator 27. Since the central portion of the vortex has a lower flow velocity than the outer peripheral portion of the vortex, the pressure is reduced, and bubbles having large diameters formed by the collision of fine bubbles generated in the small diameter path 26 accumulate. In addition, since shear force acts on the vortex due to the velocity gradient generated in the radial direction, when a large bubble at the center of the vortex moves to the outer periphery of the vortex by centrifugal force, it is divided by the vortex shear force and becomes a small bubble. Changes to. As shown by the arrow B, the outer periphery of the vortex is preferentially discharged into the downstream flow path 28 by the centrifugal force caused by the rotation of the vortex. As described above, large-sized bubbles are removed from the outer periphery of the vortex. Since fine bubbles having a predetermined diameter or less are present, the fine bubbles having a predetermined diameter or less are continuously discharged from the outer periphery of the vortex together with water.

  The outlet 29 which is the downstream end of the downstream flow path 28 of the fine bubble generating nozzle 24 is connected to the upstream end of the injection nozzle 10, and the fine bubbles discharged from the outlet 29 of the fine bubble generating nozzle 24 in the injection nozzle 10. Water containing fine bubbles made of water containing water is branched and jetted from each jet port.

  Here, the melting portion 16 of the fine bubble generating device 14 may be a bellows-shaped melting tube 31 shown in FIG. The melting tube 31 is provided with a large number of resistance portions 30 in the axial direction on its inner surface for suddenly changing the pressure and flow velocity. The resistance portion 30 is formed of an annular concave portion having an arc cross section, and a connecting portion between adjacent resistance portions 30 is an annular convex portion 32 protruding into the melting tube 31. When the gas mixture water pressurized by the circulation pump 13 flows into the melting tube 31, the gas mixture water is greatly disturbed locally by the continuous resistance portion 30 as shown by an arrow C in FIG. Further, since the diameter of the annular convex portion 32 is the smallest in the dissolution tube 31, the inside of the annular convex portion 32 has a high flow velocity and a small pressure, and the bottom portion of the resistance portion 30 has the largest diameter. The inside of the bottom portion has a slow flow rate and a large pressure, whereby the gas mixed water passing through the dissolution tube 31 repeats rapid changes in the flow rate and pressure. Due to these actions, the gas-mixed water is stirred and mixed when passing through the dissolution tube 31, and the dissolution of the gas in the gas-mixed water into the water is greatly promoted.

  FIG. 2 shows another example of the fine bubble generator 14. The fine bubble generator 14 of this example generates fine bubbles by a shearing method. The fine bubble generating device 14 includes a gas mixing unit 15, a circulation pump 13, and a shearing unit 33 (see FIG. 6) including a venturi tube, which are sequentially provided in the circulation path 12 from the upstream side. As shown in FIG. 6, the microbubble generator 14 changes the pressure when water passes through the shearing portion 33, and the shearing force accompanying this pressure change is applied to the water in the water supply channel 5 by the gas mixing portion 15. By acting on the mixed bubbles, the gas is sheared to generate fine bubbles. Here, the shearing portion 33 of this example is composed of a shearing nozzle 34 connected to the upstream end of the injection nozzle 10, that is, the injection nozzle 10 branches off the water containing fine bubbles discharged from the outlet 42 of the shearing nozzle 34. It ejects from each ejection port.

  As shown in FIG. 7, the shearing portion 33 is composed of an upstream main channel 35 and a plurality of branch channels 36 branched from the main channel 35, and the gas mixed in the gas mixture water is branched from the main channel 35. Fine bubbles may be generated by being divided by a shearing force when flowing in the path 36. In FIG. 7, the upstream main flow path 35 is a venturi tube, and in the same way as in the example of FIG. 3, the shearing force accompanying the pressure fluctuation is applied to the gas mixed in the gas mixture water to further refine the gas flow. Yes.

  The dishwasher equipped with the fine bubble generating device 14 as described above connects the circulation pump 13, the drainage pump 7, and the water supply valve 8 provided in the water supply channel 5 to a control unit (not shown). The control unit includes a main cleaning mode for cleaning dishes and a rinse cleaning mode for dishes cleaned in the main cleaning mode, and the dishes can be cleaned by sequentially performing the main cleaning mode and the rinse cleaning mode. ing.

  That is, when washing dishes using a dishwasher, first the door 2 of the washing tub 3 is opened, and then a solid detergent or the like dedicated to the dishwasher is used as a useful component useful for washing dishes in the washing tub 3. And the door 2 is closed. The detergent may be put into the washing tank 3 by hand. For example, when the door 2 is closed from the detergent storage part (not shown) provided on the back of the door 2, the detergent is automatically put into the tank body. It may be dropped on the bottom of 1.

  And if the operation part which is not shown in figure is operated and tableware washing | cleaning is started, a control part will perform this washing | cleaning mode and rinse washing mode in order.

  In the main cleaning mode, with the drain pump 7 stopped, the water supply valve 8 of the water supply channel 5 is opened for a predetermined time, and then the circulation pump 13 is operated. As a result, while the detergent is gradually dissolved in the water accumulated at the bottom of the cleaning tank 3, the cleaning liquid composed of water containing the detergent flows into the circulation path 12 as described above, and fine bubbles are generated in the cleaning liquid. Thereafter, water containing fine bubbles, which is a cleaning liquid containing fine bubbles, is discharged from each of the injection nozzles 10 of the rotating injection nozzle 10 toward the tableware in the cleaning tank 3 and cleaned.

  When the main cleaning mode ends, the rinsing cleaning mode is entered. In the rinse cleaning mode, the circulation pump 13 and the drainage pump 7 are appropriately operated while opening the water supply valve 8 and supplying water into the cleaning tank 3. As a result, the fine bubble-containing water discharged from the injection nozzle 10 is rinsed against the tableware, and water containing detergent and dirt is discharged from the drainage channel 6. And when this rinse washing mode is complete | finished, while closing the water supply valve 8, the circulation pump 13 and the drainage pump 7 are stopped, and dishwashing is complete | finished. In the rinse cleaning mode, the circulation pump 13 and the drainage pump 7 may be operated at the same time, and the rinsing of the tableware performed by the operation of the circulation pump 13 and the drainage performed by the operation of the drainage pump 7 are alternately performed a plurality of times. Also good.

  Here, in the present invention, fine bubble-containing water containing fine bubbles having a very small diameter of 0.1 to 1000 μm can be applied to the tableware, so that the main cleaning and the rinsing can be performed effectively. In other words, fine bubbles have high internal pressure due to surface tension and high permeability to dirt. Also, the influence of ultrasonic waves, high-frequency high-pressure fields (hot spots), radicals generated when a large number of fine bubbles collapse, and adsorption at the fine bubble interface. Due to the characteristics, the dirt attached to the tableware can be effectively peeled off and removed. In addition, since the water containing fine bubbles contains a large amount of fine bubbles and has a large specific surface area (surface area / volume), it is possible to enhance the reaction of the cleaning liquid containing the detergent to dirt and more efficiently remove dirt.

  Moreover, the impact sound when the water containing fine bubbles collides with the tableware can be reduced by the elasticity of the fine bubbles. Furthermore, the frictional resistance between the fine bubble-containing water and the piping can be reduced, and noise when the fine bubble-containing water passes through the circulation path 12 and the drainage path 6 can be suppressed. Moreover, by containing fine bubbles, the water containing fine bubbles becomes milky white and may be visually good. Moreover, since it can rinse efficiently, the usage-amount of water can be restrained. Furthermore, the bottom of the washing tank 3 through which water containing fine bubbles flows, the circulation path 12, the drainage path 6, the drain trap of the drainage destination, and the like can be removed. This can also prevent new slimes from occurring. In this case, particularly in the circulation path 12, the water containing fine bubbles generated in the cleaning liquid containing the detergent can be circulated in the cleaning mode so that the water can be more effectively cleaned.

  Next, the dishwasher of other embodiment is shown. In addition, about the same structure as the dishwasher of the said embodiment, the same number is provided and the overlapping description is abbreviate | omitted.

  The dishwasher of this embodiment includes a bubble diameter adjusting means 37 that adjusts the diameter of bubbles generated by the fine bubble generator 14.

  FIG. 8 shows an example of the bubble diameter adjusting means 37. The bubble diameter adjusting means 37 of this example adjusts the amount of gas mixed with the water flowing through the circulation path 12 by the gas mixing unit 15 (that is, the volume ratio of the gas to the water discharged into the cleaning tank 3) to make fine bubbles. It adjusts the diameter of the bubbles generated in the generator 14 and comprises a valve body 39 provided at the gas inlet 38 of the gas supply path 18. The valve body 39 is movable along the axial direction (arrow D) of the gas introduction port 38 of the gas supply path 18, and the valve body 39 is fixed at an arbitrary position in the axial direction of the gas introduction port 38. By adjusting the distance between the outer surface of the conical valve portion 40 of the valve body 39 and the tapered inner surface of the gas inlet port 38, the amount of gas mixed per unit time is increased to generate in the fine bubble generating device 14. It is possible to increase the bubble diameter, or conversely, to reduce the bubble diameter by reducing the mixing amount of gas per unit time.

  FIG. 9 shows another example of the bubble diameter adjusting means 37. By adjusting the flow path area of the circulation path 12, the gas shearing force is changed to adjust the bubble diameter. The bubble diameter adjusting means 37 includes a nozzle that discharges water containing fine bubbles to the injection nozzle 10 (that is, the fine bubble generating nozzle 24 that constitutes the precipitation portion 17 and the shear nozzle 34 that constitutes the shear portion 33), and the nozzle It is comprised with the rotation board 43 which can be provided so that the exits 29 and 42 of 24 and 34 may be plugged up. In addition, the outlets 29 and 42 of the nozzles 24 and 34 in this example are configured by a large number of circular holes 44, and the circular holes 45 are formed in the rotary plate 43 at positions corresponding to the holes 44 of the nozzles 24 and 34. Forming. And the bubble diameter adjustment means 37 of this example changes the number of the holes 45 of the rotation board 43 which overlaps and communicates with the hole 44 of the nozzles 24 and 34 by rotating the rotation board 43 to arbitrary positions. Thus, the flow path area of the circulation path 12 can be changed. As a result, the flow velocity flowing into the injection nozzle 10 is changed, the pressure applied to the bubbles flowing into the injection nozzle 10 is changed, and the diameter of the generated bubbles can be changed by the change in the shearing force accompanying the pressure change. That is, the bubble diameter adjusting means 37 of this example rotates the rotating plate 43 as shown in FIG. 9A, thereby reducing the number of holes 45 of the rotating plate 43 communicating with the holes 44 of the nozzles 24 and 34. It is possible to increase the flow path area of the circulation path 12 and finely shear the air bubbles downstream of the air bubble diameter adjusting means 37 to reduce the air bubble diameter. Conversely, as shown in FIG. 9B, the number of holes 45 of the rotating plate 43 communicating with the holes 44 of the nozzles 24 and 34 is reduced, the flow area of the circulation path 12 is reduced, and the bubble diameter adjusting means. The diameter of the bubble can be increased by shearing or not shearing the bubble greatly downstream of 37. The hatched portion in FIG. 9B is a hole 45 of the rotating plate 43 that does not communicate with the hole 44 of the nozzles 24 and 34. Further, the position of the valve body 39 and the rotation position of the rotation plate 43 shown in FIGS. 8 and 9 can be automatically changed, and the bubble diameter adjustment by the bubble diameter adjustment means 37 can be automatically performed. . The upper limit of the range of the bubble diameter that can be adjusted by the bubble diameter adjusting means 37 may be 0.1 to 1000 μm or may be larger than 1000 μm.

  By providing the bubble diameter adjusting means 37 for adjusting the diameter of the bubbles contained in the fine bubble-containing water as described above, for example, the diameter of the bubbles in the main cleaning mode is reduced with the passage of time. Dirt can be effectively removed, and small dirt can be effectively removed later with small fine bubbles having penetrating power. In addition, it is possible to alternately increase and decrease the diameter of the fine bubbles in the main cleaning mode, so that the stains on the tableware can be effectively removed by the sudden and rapid impact force.

  The bubble diameter adjusting means 37 is not limited to that shown in FIGS. 8 and 9. For example, in a dishwasher equipped with a fine bubble generator 14 that generates fine bubbles using at least a pressure dissolution method, the fine bubbles are generated. It is also possible to change the dissolved amount of air by changing the temperature of the water to be changed, thereby changing the diameter of the fine bubbles. Here, the temperature of the water containing fine bubbles is changed, for example, by changing the temperature of water supplied from the water supply channel 5.

  Next, the dishwasher of other embodiment is shown. In addition, about the same structure as the dishwasher of the said example, the same number is provided and the overlapping description is abbreviate | omitted.

  The dishwasher of the present embodiment is provided with useful component applying means for applying useful components useful for cleaning.

  An example of a useful component provision means is shown in FIG. The useful component providing means of this example applies a liquid surfactant useful for main cleaning as a useful component to the water flowing through the circulation path 12, and stores a tank 46 for storing the surfactant, The connection path 47 connects the upstream side of the circulation pump 13 of the path 12. At a portion where the connection path 47 of the circulation path 12 is connected, a cylindrical throttle portion 48 whose tip is narrowed toward the downstream side from the inner surface of the circulation path 12 protrudes, and the outer surface of the throttle portion 48 and the circulation path The negative pressure generating portion 49 is formed by a gap between the inner surface of the twelve inner surfaces. The connection path 47 is connected to a portion of the circulation path 12 located outside the throttle part 48, and the circulation pump 13 is operated to bring the negative pressure generating part 49 to a negative pressure so that the surface activity in the tank 46 is increased. The agent is introduced into the circulation path 12. In the illustrated example, the gas supply path 18 is also connected to a portion of the circulation path 12 constituting the negative pressure generating portion 49. In addition, an opening / closing valve 50 is provided in the connection path 47 so that whether or not the surfactant is introduced into the circulation path 12 can be automatically switched by opening / closing the opening / closing valve 50 by the control unit.

  Here, as shown in FIG. 11, the opening / closing valve 50 is opened only during a period excluding the initial stage of the main cleaning mode, thereby adding a surfactant to the water flowing through the circulation path 12 from the middle stage to the latter stage of the main cleaning mode. I can do it. That is, the initial stage of this cleaning mode is a preliminary cleaning period in which fine bubble-containing water to which no surfactant is applied is discharged into the cleaning tank 3.

  By providing the useful component applying means for applying useful components useful for cleaning dishes as described above, the dishes can be cleaned more efficiently. Moreover, since the surfactant constituting this useful component lowers the surface tension of the water flowing through the circulation path 12, it is possible to promote the refinement of the bubbles by the fine bubble generator 14.

  Next, another useful component applying means is shown in FIG. The useful component providing means of this example applies ozone, which is a gas useful for rinsing as a useful component, to the water flowing through the circulation path 12. The useful component imparting means is configured by providing an ozone generator 51 in the middle of the gas supply path 18 connected at one end to an oxygen enrichment device (not shown) that generates air or a gas containing a large amount of oxygen. . The ozone generator 51 includes a discharge unit 52 having a pair of electrodes arranged in the gas supply path 18 and a voltage application unit 53 that applies a voltage between the electrodes of the discharge unit 52. The ozone generator 51 generates a discharge by applying a high voltage between the electrodes, whereby a gas containing a large amount of oxygen supplied from one end of the gas supply path 18 in the atmosphere or from an oxygen enricher. Ozone is generated inside. That is, the microbubble generator 14 of this example uses a gas that is a basis for the microbubbles as a gas containing a large amount of ozone instead of the atmosphere (hereinafter simply referred to as ozone gas). Further, a flow rate adjusting means for adjusting the amount of ozone gas mixed in the water flowing through the circulation path 12 is provided on the downstream side of the discharge section 52 of the gas supply path 18.

  Here, ON / OFF of the operation of the ozone generator 51 (that is, whether or not voltage is applied to the discharge part) is set to ON only during a period excluding the initial period of the rinse cleaning mode as shown in FIG. The ozone gas can be applied to the water flowing through the circulation path 12 from the middle to the latter of the cleaning mode. That is, at the initial stage of the rinsing cleaning mode, a preliminary rinsing period in which fine bubble-containing water having fine bubbles generated in the atmosphere is discharged into the cleaning tank 3 is set.

  By providing the useful component applying means for applying useful components useful for rinsing as described above, rinsing can be more efficiently cleaned. That is, the ozone constituting this useful component has a powerful cleaning and sterilizing effect, so that the dishes can be sterilized effectively. At the same time, sterilization of the cleaning tank 3, the circulation path 12, the drainage path 6, the drainage drain trap, and the like can be performed.

  Further, for example, the gas mixing unit 15 in the example of FIG. 10 is configured as the useful component applying means shown in FIG. 12, and the water flowing through the circulation path 12 contains a large amount of useful components made of a surfactant and ozone. You may enable it to provide the useful component which consists of gas. Here, the opening / closing timing of the opening / closing valve 50 and the ON / OFF timing of the ozone generator 51 are the same as those shown in FIGS. 10 and 12 as shown in FIG.

It is explanatory drawing which shows the dishwasher of an example of embodiment of this invention. It is explanatory drawing which shows the dishwasher of another example. It is sectional drawing which shows an example of a melt | dissolution part. It is sectional drawing which shows a fine bubble generation nozzle. It is principal part sectional drawing which shows the other example of a melt | dissolution part. It is sectional drawing which shows an example of a shearing part. It is sectional drawing which shows the other example of a shearing part. It is sectional drawing which shows an example of a bubble diameter adjustment means. Another example of the bubble diameter adjusting means is shown, (a) is an explanatory view showing a state where the flow passage area of the circulation path is increased, (b) is an explanatory view showing a state where the flow passage area of the circulation path is reduced, (c) ) Is a side view of (a) and (b). It is explanatory drawing which shows an example of a useful component provision means. It is a time chart which shows the timing of ON / OFF of a circulation pump and opening / closing of an on-off valve in the dishwasher which has a useful component provision means same as the above. It is explanatory drawing which shows the other example of a useful component provision means. It is a time chart which shows the timing of ON / OFF of a circulation pump and the ON / OFF of an ozone generator in the dishwasher which has a useful component provision means same as the above. It is a time chart which shows the timing of ON / OFF of a circulation pump, opening / closing of an on-off valve, and ON / OFF of an ozone generator in the dishwasher which has the useful component provision means of FIG.10 and FIG.12.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Washing tank 9 Water discharging means 14 Fine bubble generator 37 Bubble diameter adjusting means

Claims (5)

  In a dishwasher for cleaning dishes by discharging water toward the tableware stored in the washing tank by the water discharge means, the diameter of the fine water having a diameter of 0.1 to 1000 μm in the water discharged into the washing tank by the water discharge means A dishwasher comprising a fine bubble generator for generating bubbles.   2. The dishwasher according to claim 1, further comprising bubble diameter adjusting means for adjusting the diameter of bubbles generated by the fine bubble generator.   The dishwasher according to claim 1 or 2, further comprising useful component imparting means for imparting useful components useful for cleaning dishes to the water containing fine bubbles.   The above-mentioned fine bubble generating device generates fine bubbles in a cleaning solution made of water containing a detergent, and discharges fine bubble-containing water made of a cleaning solution that has generated the fine bubbles into a cleaning tank to wash dishes. The dishwasher according to any one of claims 1 to 3, further comprising a washing mode.   The fine bubble generating device generates fine bubbles in water, and includes a main cleaning mode in which a cleaning liquid made of water containing a detergent is discharged into a cleaning tank, and water containing fine bubbles made of water that has generated the fine bubbles. The dishwasher according to any one of claims 1 to 4, further comprising a rinsing washing mode for discharging into the washing tank.

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