JP2007007138A - Washing device and dishwasher having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form fine mist by atomization while securing electrical safety. <P>SOLUTION: A dishwasher has a washing tub 4 for storing articles 8 to be washed, a reservoir part 17 for storing liquid washing agent for applying to the articles 8 to be washed, a particulate forming means 16 for forming the washing agent in the reservoir part 17 into particulates, an atomization means 24 for atomizing the particulates of washing agent formed in the particulate forming means 16, and a guide part 25 for guiding the particulates of washing agent atomized by the particulate forming means 16 into the atomization means 24. The atomization means 24 has an electric discharge part 26 provided with a grounded cylindrical electrode 27 and a rod-like electrode 28 arranged in a center axial part of the cylindrical electrode 27, and a power source 29 for applying high voltage to the electric discharge part 26. An upstream opening of the cylindrical electrode 27 is inserted in the guide part 25 and retained in a hollow state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cleaning device for removing dirt and deposits and a dishwasher equipped with the same.

  2. Description of the Related Art Conventionally, a dishwasher that cleans tableware or the like has been considered to easily remove dirt by atomizing a detergent solution and attaching it to the surface of the tableware (see, for example, Patent Document 1). FIG. 8 shows a cross-sectional view of the dishwasher described in the publication. As shown in FIG. 8, at the lower part of the cleaning tank 1, there is provided cleaning means 4 for injecting the cleaning water pressurized by the cleaning pump 2 onto an object to be cleaned 3 such as tableware. A detergent liquid scattering means 5 is provided at the lower part of the cleaning tank 1.

The operation of the above configuration will be described below. First, a detergent is put into the detergent liquid scattering means 5, and a predetermined amount of water that becomes a high concentration detergent liquid is supplied. Next, as a pretreatment step for cleaning by the cleaning means 4, the detergent liquid is made mist from the detergent liquid scattering means 5 and scattered in the cleaning tank 1, and this high concentration detergent liquid is adhered to the object to be cleaned 3. Then, the mist of the detergent liquid adhering to the object to be cleaned 3 permeates into the dirt adhering to the object to be cleaned 3 by leaving it for a predetermined time, so that the dirt is easily loosened and peeled off due to the surface active action of the detergent. To do. Thereafter, in the main cleaning step, water is supplied into the cleaning tank 1 and the cleaning water pressurized by the cleaning pump 2 is sprayed from the cleaning means 4 to clean the object 3 to be cleaned.
JP 2005-52470 A

The mist changes its internal / external pressure difference with the outside world depending on its particle size, and the smaller the particle size, the larger the internal / external pressure difference. When the mist adheres to the dirt, the greater this internal / external pressure difference, the higher the penetration force of the detergent solution into the dirt, making it easier to remove the dirt. However, the conventional detergent liquid scattering means 5 includes a general ultrasonic vibrator or a pressure spray as a structure for atomizing, and the particle diameter of mist generated by this structure is 3 to 50 μm. The internal / external pressure difference between the mist and the outside at this time is about 0.5 kgf / cm ² . With this internal / external pressure difference, there is a problem that the osmotic force is insufficient to effectively remove various stains.

  In addition, the diffusion rate of mist varies depending on the particle size, and the diffusion rate is faster as the particle size is smaller. Therefore, the finer mist tends to reach every corner in the cleaning tank 1. With a conventional mist particle size of 3 to 50 μm, it is easy to settle even when atomized, and since the diffusion is insufficient, the washing residue may remain depending on the installation form of the object to be cleaned in the cleaning tank or the shape of the object to be cleaned. It also had the problem of occurring.

  In order to solve the above-described problems and further improve the cleaning power, mist miniaturization is a very important technical problem. As a method for generating fine mist, for example, there is an electrostatic atomization method. This is composed of a porous rod-shaped water absorber having a sharp tip and a water tank, and the lower part of the water absorber is immersed in water. When a high voltage is applied to this water-absorbing body, water is sucked up by capillary action, and the water that reaches the tip of the water-absorbing body undergoes Rayleigh splitting and atomizes as a mist having a particle size on the order of several tens of nm.

  However, in such an electrostatic atomization system, since it atomizes through a porous water-absorbing body, there is a problem that it cannot be atomized due to clogging when a detergent solution is used. In addition, even when water is used, only water that has been sucked into the rod-shaped water absorber by capillary action and reaches the tip is charged, split, and atomized, so that it is possible to generate fine mist with a particle size on the order of several tens of nm. Although it is possible, the atomization amount is as extremely small as 0.008 g / min. Therefore, it is difficult to put it into practical use as an atomization system mounted on a cleaning device.

  Furthermore, applying a high voltage in such a water intervening apparatus requires a sufficient technical device for ensuring electrical insulation.

  The present invention solves the above-mentioned conventional problems, and even when using a detergent solution, it can be atomized into fine mist that is electrically safe and good, and realizes an atomization amount necessary and sufficient for cleaning. An object of the present invention is to provide a cleaning apparatus that can efficiently remove various kinds of dirt without being affected by the installation form and shape of the object to be cleaned.

  In order to solve the above-mentioned problems, the cleaning device of the present invention comprises a atomizing means for atomizing a detergent liquid, a atomizing means for atomizing the detergent liquid atomized by the atomizing means, and the atomizing means. A guide unit that guides the atomized detergent liquid to the micronization unit, and the micronization unit includes a grounded cylindrical electrode, and a rod-shaped electrode that applies a high voltage disposed at a central axis of the cylindrical electrode. The cylindrical electrode has an opening on the upstream side thereof held in a hollow shape in the guide portion.

  Thereby, it is possible to reduce the short circuit between the guide portion and the cylindrical electrode due to the detergent liquid, to ensure electrical safety, and to reduce the size of the discharge portion.

  The cleaning device of the present invention can be atomized into fine mist that is electrically safe and good even when using a detergent solution, and realizes the amount of atomization necessary for cleaning, Without being affected by the shape, it is possible to efficiently remove various kinds of dirt by increasing the permeation power to the dirt.

  The first invention includes a cleaning tank that accommodates an object to be cleaned, a storage part that stores a detergent liquid to be adhered to the object to be cleaned, atomization means for atomizing the detergent liquid in the storage part, and the atomization A finer means for refining the detergent liquid atomized by the means, and a guide portion for guiding the detergent liquid atomized by the finer means to the finer means, and the finer means is a grounded cylindrical electrode And a discharge part provided with a rod-like electrode disposed on the central axis part of the cylindrical electrode, and a power supply part for applying a high voltage to the discharge part, the cylindrical electrode has an opening on the upstream side thereof By inserting into the guide part and holding it hollow, it is further refined to several tens to several hundreds of nanometers by the miniaturization means. The number of particles also increases 100,000 to 1,000,000 times. Also, the diffusion rate is improved. Therefore, various stains can be efficiently removed without being affected by the installation form and shape of the object to be cleaned. Furthermore, even if it uses a detergent liquid, while being able to atomize to a fine mist satisfactorily, the atomization amount required for washing | cleaning can be ensured according to the atomization capability of the atomization means.

  In the configuration in which the high-voltage rod-shaped electrode is held by the guide portion, the inner surface of the guide portion is wetted by the detergent liquid atomized by the atomizing means, but the cylindrical electrode is in the guide portion. By being held hollow, it is possible to reduce the short circuit between the guide portion and the cylindrical electrode connected by the detergent solution, and to ensure electrical safety. Further, the size of the discharge part can be reduced.

  In the second invention, in particular, the miniaturization means of the first invention sets the distance between the cylindrical electrode and the inner surface of the guide portion to be longer than the distance between the rod-shaped electrode and the cylindrical electrode. Even if the inner surface of the part is wet with a detergent solution and is in a high voltage state, the distance between the electrode between the rod-like electrode and the cylindrical electrode in the discharge part is shorter. It is possible to prevent overcurrent from flowing between the electrodes.

  According to the third invention, in particular, by providing a large number of protrusions for cutting the liquid layer adhering to the inner surface of the guide portion of the first or second invention, the guide portion inner surface is continuous even when wet with the detergent solution. Therefore, it is possible to reduce a situation where the inner surface of the guide portion is in a high voltage state and further prevent an overcurrent from flowing between the guide portion and the cylindrical electrode.

  In particular, the fourth aspect of the present invention provides a drainage hole on the bottom surface of the guide part of any one of the first to third aspects of the invention, so that even if the inner surface of the guide part gets wet with the detergent solution, Since the detergent solution is discharged to the outside, it will not be connected continuously with the detergent solution, reducing the high voltage state on the inner surface of the guide unit, and discharging between the guide unit and the cylindrical electrode will cause overcurrent to flow. Can be further prevented.

  In the fifth aspect of the invention, in particular, by providing a water repellent layer on the inner surface of the guide portion of any one of the first to fourth aspects, the detergent liquid does not spread on the inner surface of the guide portion and adheres in droplets. Since it will not be connected continuously with detergent solution, it will reduce the high voltage state on the inner surface of the guide part, and further prevent the overcurrent from flowing between the guide part and the cylindrical electrode. be able to.

  In the sixth aspect of the invention, in particular, since the water repellent layer of the fifth aspect of the invention can be improved in water repellency by being constituted by the fluorine-based coating treatment, it is possible to further prevent the overcurrent from flowing. .

  In a seventh aspect of the present invention, in particular, in any one of the first to sixth aspects, a blower fan is provided for supplying the detergent liquid atomized by the atomization means to the atomization means, and before the atomization means is activated. Since the discharge unit is dried by operating the blower fan, the amount of the detergent liquid adhering to the inner surface of the guide unit at the start of discharge can be reduced by the micronization means, and the inner surface of the guide unit is in a high voltage state. It is possible to further prevent the overcurrent from flowing due to discharge between the guide portion and the cylindrical electrode.

  An eighth invention is the cleaning device according to any one of claims 1 to 7, a water supply device that supplies water to the cleaning tank, a cleaning pump that pressurizes cleaning water, and cleaning that is pressurized by the cleaning pump. It is a dishwasher equipped with a cleaning means for jetting water, and it is electrically safe and can efficiently clean various types of dirt by increasing the penetration of dirt without being affected by the installation form or shape of the dishes. Can do.

  Since the ninth aspect of the invention is particularly configured to wash the discharge part with tap water supplied by the water supply device of the eighth aspect of the invention, it is possible to remove detergent liquid with high conductivity from the discharge part. It is possible to further prevent an overcurrent from flowing due to discharge between the guide portion and the cylindrical electrode. In addition, since the surfaces of the rod-like electrode and the cylindrical electrode where discharge occurs are cleaned, miniaturization can be performed with stable discharge.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a dishwasher equipped with a cleaning device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part of the dishwasher, and FIG. 3 is a micronization means of the dishwasher. 4 is a cross-sectional view of the miniaturization means, and FIG. 5 is an enlarged cross-sectional view of the bottom of the miniaturization means.

  1-5, the main body 1 of the dishwasher is provided with an opening 2 in the front, and is configured to be able to be closed by a plurality of lids 3 that open the opening 2 up and down. A cleaning nozzle (cleaning means) 7 having an injection port 6 for spraying cleaning water pressurized by a cleaning pump 5 is provided below the cleaning tank 4. A table basket 9 for storing an object to be cleaned 8 such as tableware is provided above the cleaning nozzle 7. A reservoir 10 for storing cleaning water is provided at the bottom of the cleaning tank 4, and a heater (heating means) 11 for heating the stored cleaning water is disposed.

  A roller 12 is arranged at the lower part of the tableware basket 9 and a guide rail 13 is arranged on the inner wall of the washing tub 4. The tableware basket 9 is provided so as to be movable in a substantially horizontal direction with respect to the main body 1. When the body 3 is opened, it can be pulled out from the opening 2 onto the lid 3 that opens downward. 14 is a water supply valve for supplying cleaning water to the cleaning tank 4, and 15 is a control means including a microprocessor or the like provided in the lid 3 that opens downward, and controls the cleaning pump 5, the heater 11, and the like.

  The atomizing means 16 includes an atomizing device 18 that atomizes the detergent liquid stored in the storage unit 17 and includes an ultrasonic vibrator 19 that atomizes the detergent liquid. The atomization device 18 encloses a liquid (antifreeze) in the container 20, transmits the vibration of the ultrasonic vibrator 19 disposed in the lower part of the container 20 to the vibration surface 21 through the liquid, and stores it in the storage unit 17. The detergent solution is raised to form the water column 22 and atomize to atomize the detergent solution. The ultrasonic vibrator 19 is provided in the container 20 to be protected from contamination, and the vibration surface 21 of the container 20 is provided so as to be immersed in the detergent liquid stored in the storage unit 17.

  A refining means 24 for refining the mist of the detergent liquid atomized by the atomizing means 16 is provided above the storage portion 17. The pulverizing means 24 further refines the mist atomized by the atomizing means 16, and the mist atomized by the atomizing means 16 is contained in a hollow guide portion 25 which is a part of the atomizing means 24. To be guided through.

  The miniaturization means 24 has a discharge part 26. The discharge part 26 is comprised from the cylindrical electrode 27 which consists of metal materials, such as stainless steel, and the rod-shaped electrode 28 which consists of the tungsten arrange | positioned in the inner center axial part of this cylindrical electrode 27. As shown in FIG. The cylindrical electrode 27 is held in a hollow shape by inserting its upstream opening into a guide portion 25 formed of an electric insulator such as resin. The rod-shaped electrode 28 is held on the bottom surface of the guide portion 25. Here, the distance b between the cylindrical electrode 27 and the inner surface of the guide portion 25 is set longer than the distance a between the rod-shaped electrode 28 and the cylindrical electrode 27.

  The rod-shaped electrode 28 is electrically connected to a power supply unit 29 that applies a high voltage by a conductor 30, and the cylindrical electrode 27 is grounded by the conductor 30. The bottom surface of the guide portion 25 is provided with a large number of protrusions having a height of 2 to 5 mm over the entire surface, and the detergent liquid is accumulated on the bottom portion of the guide portion 25 and cuts the liquid layer of the detergent solution. . The mist entering the cylindrical electrode 27 from the guide portion 25 is further refined from the opened outlet of the cylindrical electrode 27 and scattered into the cleaning tank 4.

  About the washing | cleaning apparatus comprised as mentioned above and the dishwasher provided with this washing | cleaning apparatus, the operation | movement and an effect | action are demonstrated below. First, after putting detergent into the storage part 17 of the atomization means 16, tap water is supplied through the water supply valve 14, and a high concentration detergent solution is stored in the storage part 17. The concentration and amount of the detergent liquid can be set according to the object to be cleaned and its amount.

  Next, when a voltage is applied to the atomizing means 16, the ultrasonic vibrator 19 vibrates in the vertical direction at a constant frequency, and the water column 22 rises from the surface of the detergent liquid stored by this vibration energy, and is about 3 g / Mist is generated with an atomization amount of min. The particle size of the mist at this time is 2 to 5 μm. Then, this mist flows through the guide portion 25 of the miniaturizing means 24 as shown by the arrow A and flows into the discharge portion 26.

  When a high voltage of +5 kV is applied to the rod-shaped electrode 28 in the discharge part 26, the periphery of the electrode is in a high electric field state, and the mist of the detergent solution that has flowed is charged. When this amount of charge exceeds the surface tension of the mist, it splits and is refined to a particle size of several tens to several hundreds of nanometers. The mist charged by the discharge unit 26 and exceeding the Rayleigh limit is split and released from the opening of the discharge unit 26 as shown by the arrow B, but the mist charged with the electric charge below the Rayleigh limit is activated by Coulomb force and grounded. It moves to the cylindrical electrode 27 and adheres. For this reason, although the amount of atomization decreases by about 40%, even if this reduction is taken into consideration, since the fine mist can be discharged from the discharge part 26 at an amount of atomization of about 2 g / min, the mist necessary and sufficient for washing dishes etc. The amount of conversion can be secured.

  Here, the inner surface of the guide portion 25 is wetted by the mist of the detergent liquid generated by the atomizing means 16. However, the cylindrical electrode 27 has its upstream opening inserted into the guide portion 25 and held in a hollow shape, so that it is possible to reduce the short circuit between the guide portion 25 and the cylindrical electrode 27 due to the detergent solution. can do.

  Further, since the distance L1 between the cylindrical electrode 27 and the inner surface of the guide portion 25 is set longer than the distance L2 between the rod-shaped electrode 28 and the cylindrical electrode 27, the electrical resistance between the guide portion 25 and the cylindrical electrode 27 is Since it is larger than between the rod-shaped electrode 28 and the cylindrical electrode 27, discharge is preferentially generated at the discharge portion 26, so that it is possible to prevent the discharge between the guide portion 25 and the cylindrical electrode 27 and the overcurrent flow. .

  Further, the bottom surface of the guide portion 25 is provided with a large number of protrusions having a height of 2 to 5 mm over the entire surface, and the liquid layer of the detergent liquid formed by the detergent liquid collecting on the bottom portion of the guide portion 25 is formed. It is possible to prevent the overcurrent from flowing due to discharge between the guide portion 25 and the cylindrical electrode 28 by reducing the size and reducing the inner surface of the guide portion 25 from being in a high voltage state.

Thus, the mist of the detergent liquid refined by the discharge unit 25 diffuses into the cleaning tank 4. At this time, since the particle diameter of the mist is a fine mist of several tens to several hundreds of nanometers, it diffuses to every corner in the cleaning tank 4 and is to be cleaned 8 stored in the cleaning tank 4 regardless of the installation location. A fine mist of detergent liquid can be adhered to the surface. And since the mist adhering to the dirt of the article 8 to be cleaned has an internal / external pressure difference of about 30 kgf / cm ² , the osmotic force about 60 times that of the conventional one can be obtained. Due to the synergistic effect of penetrating into the interior and the surface-active action of the detergent, it is possible to make the dirt easier to peel off.

  After the mist of the fine detergent solution is scattered for a predetermined time, or after a lapse of the predetermined time with the fine mist of the detergent solution attached to the object 8 to be cleaned, the object 8 to be cleaned becomes dirty. After being easily peeled off, a cleaning liquid set to a predetermined detergent concentration is ejected from the cleaning nozzle 7 to clean the object 8 to be cleaned with high pressure. Thereafter, tap water supplied from the water supply valve 14 is sprayed from the cleaning nozzle 7 to rinse the object 8 to be cleaned and dried to complete a series of cleaning steps.

  As described above, in the present embodiment, the cleaning tank 4 that accommodates the object 8 to be cleaned, the storage part 17 that stores the detergent liquid that adheres to the object 8 to be cleaned, and the detergent liquid in the storage part 17 is atomized. And a guide unit 25 for guiding the detergent liquid atomized by the atomizing means 24 to the atomizing means 24. The finer means 24 for atomizing the detergent liquid atomized by the atomizing means 16; The micronization means 24 includes a grounded cylindrical electrode 27, a discharge unit 26 provided with a rod-shaped electrode 28 for applying a high voltage disposed at the central shaft portion of the cylindrical electrode 27, and a power supply unit 29. The cylindrical electrode 27 has its upstream opening held hollow in the guide 25, so that it can be atomized into fine mist that is electrically safe and good even when using a detergent solution. The amount of atomization necessary for cleaning is achieved, and dirt adhering to the object to be cleaned 8 is lifted. By washing by willing, can be removed without being affected by the installation form and shape of the object to be cleaned, various stains by increasing the penetration against dirt efficiently.

(Embodiment 2)
FIG. 6 is a cross-sectional view of a dishwasher equipped with a cleaning device according to the second embodiment of the present invention, and FIG. 7 is a cross-sectional view of the miniaturization means. In FIG. 5 and FIG. 6, a blower fan 32 that sends air to the micronization unit 24 is provided above the storage unit 17 that stores the detergent liquid of the micronization unit 16. Further, a water repellent layer 33 made of a fluorine-based coating treatment film or the like is provided on the inner surface of the guide portion 25. A drain hole 34 is provided at the bottom of the guide portion 25. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.

  About the washing | cleaning apparatus comprised as mentioned above and the dishwasher provided with this washing | cleaning apparatus, the operation | movement and an effect | action are demonstrated below. First, the blower fan 32 is operated for a certain period of time, air is sent into the discharge part 26 of the miniaturization means 24, and the inner surface of the guide part 25 is dried. Thereafter, the atomizing means 16 and the atomizing means 24 are operated, and the fine mist of the detergent liquid is scattered into the cleaning tank 4. At this time, since the guide portion 25 is dried in advance, a discharge is caused between the guide portion 25 and the cylindrical electrode 28 in order to reduce the extreme wetness of the guide portion 25 with the detergent solution in a few minutes of the mist spraying process. It is possible to prevent an overcurrent from flowing.

  Further, since the water repellent layer 33 such as a fluorine-based coating treatment film having a water repellent function is provided on the inner surface of the guide portion 25, the surface is prevented from being continuously spread by being wet with the detergent solution. Further, since the drain hole 34 is provided, the detergent liquid flows out from the drain hole 34 to the outside of the micronization means 16, and further prevents the surface from getting wet and spreading continuously with the detergent liquid, It is possible to prevent overcurrent from flowing due to discharge between the guide portion 25 and the cylindrical electrode 28.

  After the mist spraying process, dirt on the article to be cleaned 8 is lifted and cleaned by the cleaning means 7, and then the detergent liquid is drained and tap water is supplied to the storage unit 17 by the water supply device 35. After the water supply is completed, the cleaning object 8 is rinsed by the cleaning means. At this time, by operating the atomization means 16 and the blower fan 32, the discharge part 26 is rinsed with a mist of tap water, and the detergent adhering to the electrode of the discharge part 26 and the guide part 25 is removed. The drainage at this time is sent from the drain hole 34 to the reservoir 17. As a result, the detergent solution having a high conductivity can be removed from the discharge part 26, so that it is possible to further prevent an overcurrent from flowing between the guide part 25 and the cylindrical electrode 27. In addition, since the surfaces of the rod-like electrode 28 and the cylindrical electrode 27 where the discharge occurs are cleaned, the miniaturization can be performed with a stable discharge.

  As described above, in the present embodiment, the drain hole 34 is provided on the bottom surface of the guide portion 25 of the miniaturizing means 24, the surface treatment is performed with a water repellent function, and the supplied tap water is provided. In this configuration, the discharge portion 26 is cleaned to prevent overcurrent from flowing between the guide portion 25 and the cylindrical electrode 27 and to clean the surfaces of the rod-shaped electrode 28 and the cylindrical electrode 27 where discharge occurs. Therefore, miniaturization can be performed with stable discharge.

  As described above, the cleaning apparatus according to the present invention generates a mist of detergent liquid having a fine particle size on the order of several tens to several hundreds of nanometers while ensuring electrical safety so as to raise dirt and clean the surface. Thus, various stains on the object to be cleaned can be effectively removed, so that the present invention can be applied to applications such as toilets and washing machines.

Sectional drawing of the dishwasher provided with the washing | cleaning apparatus in the 1st Embodiment of this invention Cross section of the main part of the dishwasher Perspective view of miniaturization means of the dishwasher Sectional view of the miniaturization means of the dishwasher Expanded sectional view of the bottom of the dishwasher miniaturization means Sectional drawing of the principal part of the dishwasher provided with the washing | cleaning apparatus in the 2nd Embodiment of this invention. Sectional view of the miniaturization means of the dishwasher Cross-sectional view of a conventional dishwasher

Explanation of symbols

4 Cleaning tank 5 Cleaning pump 7 Cleaning nozzle (cleaning means)
8 Object to be cleaned 16 Atomization means 17 Reservoir 24 Refining means 25 Guide part 26 Discharge part 27 Cylindrical electrode 28 Rod electrode 29 Power supply part

Claims (9)

A cleaning tank for storing an object to be cleaned, a storing part for storing a detergent liquid to be adhered to the object to be cleaned, a atomizing means for atomizing the detergent liquid in the storing part, and a detergent atomized by the atomizing means And a guide unit that guides the detergent liquid atomized by the atomization means to the atomization means. The atomization means includes a grounded cylindrical electrode and an electrode of the cylindrical electrode. A discharge portion provided with a rod-shaped electrode disposed in a central shaft portion; and a power supply portion for applying a high voltage to the discharge portion. The cylindrical electrode has an upstream opening inserted into the guide portion. Cleaning device held in a hollow shape. The cleaning apparatus according to claim 1, wherein the miniaturizing means sets a distance between the cylindrical electrode and the inner surface of the guide portion to be longer than a distance between the rod-shaped electrode and the cylindrical electrode. 3. The cleaning apparatus according to claim 1, further comprising a plurality of protrusions for cutting off a liquid layer adhering to the inner surface of the guide portion. The cleaning apparatus according to any one of claims 1 to 3, wherein a drain hole is provided on a bottom surface of the guide portion. The cleaning apparatus according to claim 1, wherein a water repellent layer is provided on the inner surface of the guide portion. The cleaning apparatus according to claim 5, wherein the water repellent layer is constituted by a fluorine coating treatment. The blower fan which supplies the detergent liquid atomized by the atomization means to the atomization means is provided, It was set as the structure which operates the said air blower fan before the said atomization means act | operates, and dries the discharge part. The cleaning apparatus according to any one of claims. The cleaning device according to any one of claims 1 to 7, a water supply device for supplying water to the cleaning tank, a cleaning pump for pressurizing the cleaning water, and a cleaning means for injecting the cleaning water pressurized by the cleaning pump And dishwasher. The dishwasher according to claim 8, wherein the discharge section is washed with tap water supplied by a water supply device.