JP4075861B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher for washing dishes using washing water.

  Conventionally, this type of dishwasher has a configuration as shown in FIG. 10 (see, for example, Patent Document 1). Hereinafter, the configuration will be described. As shown in the figure, a cleaning tank 1 for storing objects to be cleaned such as tableware, a lid 2 for opening and closing the cleaning tank 1, a water supply valve 3 for supplying water to the cleaning tank 1, and a cleaning pump for pressurizing the cleaning water 4 and an injection means 5 having an injection port for injecting cleaning water. A user sets an object to be cleaned in the cleaning tank 1, puts a detergent into the cleaning tank 1, and a lid 2. Close and then start operation.

After the operation is started, first, the water supply valve 3 is opened to supply water into the cleaning tank 1, water is stored at the bottom of the cleaning tank 1, and after supplying a predetermined amount of water, the water supply valve 3 is closed and the cleaning pump 4 is operated. The detergent is dissolved in water to become washing water, and the washing water pressurized by the washing pump 4 is jetted from the jetting unit 5 to the washing object, and the washing object is washed.
JP 2003-339607 A

  However, in conventional dishwashers, washing is performed by spraying the washing water obtained with a predetermined amount of detergent and water, but it is not universal for all stains, and it is difficult to completely wash off lipsticks and terrible tea astringency. There is also dirty. This is described in the instruction manual, etc., and the user was asked to wash his hands with a sponge beforehand.

  In order to wash off such dirt, there has been a need to increase the concentration of the detergent or increase the energy of jetting such as the pressure of the washing water. In order to increase the concentration of the detergent, it is necessary to add a lot of detergent, and there is a problem that the amount of detergent used increases. Further, when the washing water injection energy is increased, the amount of water used and the amount of power consumption are increased, which causes problems such as deterioration in economic efficiency and increase in cleaning noise.

  And washing performance can be improved by performing the process of scattering washing water with high washing performance, such as high detergent concentration and high temperature, in a washing tub, and making it adhere to a thing to be washed. By using an ultrasonic vibrator, the cleaning water can be easily atomized and scattered, but this involves a phenomenon that the cleaning water rises from the water surface (the raised liquid is called a water column). The amount of the raised water column is much larger than the amount splashed into the washing tank, so that if the water column jumps outside the washing water storage unit, a larger amount of washing water is required than the amount necessary for washing. Therefore, in order to obtain washing water having a predetermined high detergent concentration, there is a problem that the amount of detergent used increases.

  In addition, a lid is required to protect the ultrasonic vibration unit from foreign matters or dirt during operation, and the lid is desired to be as small as possible in order to reduce the size of the apparatus. However, if the generated water column is blocked at a short distance for the purpose of downsizing, there is a problem that the amount of fine particles scattered is reduced.

  The present invention solves the above-described conventional problems, and aims to improve the cleaning performance without removing the dirt that could not be washed in the past without securing the amount of fine particles scattered and increasing the amount of detergent and jet energy. To do.

In order to solve the conventional problems, dishwasher of the present invention includes: a cleaning tank for accommodating the object to be cleaned dishes such as the washing water container portion containing washing water, the detergent containing portion in the wash water holding section A detergent charging part for charging detergent into the cleaning water, an ultrasonic vibration part for atomizing the cleaning water stored in the cleaning water storage part and splashing it into the cleaning tank, and a lid for covering the ultrasonic vibration part; the provided, an opening provided in the lid, before SL outside of the opening receiving portion for receiving the more wash water raised to the water surface of the wash water contained in the washing water holding portion to the vibration of the ultrasonic vibration unit A cleaning water recovery part is provided for returning the cleaning water abutting on the receiving part to the detergent charging part, and the cleaning water recovered by the cleaning water recovery part is guided to the detergent storage part in the cleaning water storage part are those having the structure described, rotating the raised wash water to the wash water containing portion With this configuration, the same effect can be achieved if there is a very small amount of cleaning water equivalent to or greater than the amount of splash required for cleaning. Detergent components such as surfactants and bleaching agents act on the soil at a much higher concentration than before, and can strongly remove the soil.

  In addition, an opening of a predetermined size is provided in the lid, and the water column is discharged to the outside of the lid once through the opening, and the washing water is received at the receiving portion provided outside the lid, By collecting the washing water again in the washing water storage unit, the lid is small and can generate a large amount of scattered washing water while protecting the ultrasonic vibration unit. Thereby, high cleaning performance is obtained.

In addition, a cleaning water recovery unit that returns the raised cleaning water to the detergent charging unit is configured to guide the cleaning water recovered by the cleaning water recovery unit to the detergent storage unit in the cleaning water storage unit. The washing performance can be further improved by generating and scattering washing water having a higher concentration, such as stirring the detergent into which water has been added to promote dissolution of the detergent.

Even if the dishwasher of the present invention has a configuration in which the washing water is scattered using the ultrasonic vibration unit, the collected washing water does not increase the amount of detergent to be used and the jetting energy, and the collected washing water stirs the detergent. By promoting the dissolution of water, generating higher-concentration washing water and dispersing it, the washing performance can be improved, and dirt that could not be washed conventionally can be removed.

1st invention is a washing tank which accommodates to-be-washed objects, such as tableware, a washing water accommodation part which accommodated washing water, and a detergent input part for putting detergent into a detergent accommodation part in the washing water accommodation part, An ultrasonic vibration unit that atomizes the cleaning water stored in the cleaning water storage unit and scatters the cleaning water in the cleaning tank; and a lid that covers the ultrasonic vibration unit, the opening provided in the lid comprises a pre-Symbol receiving portion for receiving the washing water raised to the water surface of the wash water contained in more the washing water holding portion to the vibration of the ultrasonic vibrating unit to the outer side of the opening, it abuts on the receiving portion cleaning A cleaning water recovery unit is provided for returning water to the detergent charging unit, and the cleaning water recovered by the cleaning water recovery unit is configured to be guided to the detergent storage unit in the cleaning water storage unit. Washing water with high cleaning performance such as high temperature and high temperature is scattered in the cleaning tank. By performing the step of depositing, thereby improving the washing performance. Even when an ultrasonic vibrator is used as a means for splashing cleaning water, it is possible to collect cleaning water that has risen from the surface of the water in the cleaning water storage unit, so that it is equivalent to or greater than the amount required for cleaning. It is sufficient if there is cleaning water, and the amount of cleaning water to be used can be suppressed to a small amount. For example, if an extremely small amount of washing water is produced using the same amount of detergent as before, detergent components such as alkalis, surfactants, and bleaching agents act against dirt at a much higher concentration than before, and are powerful. The cleaning performance can be improved without increasing the amount of detergent and the jetting energy, such as being able to remove dirt, and dirt that could not be washed conventionally can also be removed.

In addition, a cleaning water recovery unit that returns the raised cleaning water to the detergent charging unit is configured to guide the cleaning water recovered by the cleaning water recovery unit to the detergent storage unit in the cleaning water storage unit. The washing performance can be further improved by generating and scattering washing water having a higher concentration, such as stirring the detergent into which water has been added to promote dissolution of the detergent.

A lid is necessary to protect the ultrasonic vibration part from foreign matters and dirt during operation, and it is desirable to make the lid as small as possible in order to reduce the size of the apparatus. However, due to its miniaturization, the amount of fine particles scattered and thus block the water column generated in short there is a problem that decreases. Therefore, an opening of a predetermined size is provided in the lid, the water column is discharged to the outside of the lid once through the opening, and the washing water is received at the receiving portion outside the lid, and the washing water is discharged. By collecting it again in the washing water storage part, while protecting the ultrasonic vibration part, the lid is small and can generate a large amount of scattered splashing water. By spreading the water, higher cleaning performance can be obtained. Thereby, a user's washing operation can be reduced. In addition, if the amount of cleaning water to be used is small, the cleaning water storage section can be configured to be small, and the product can be downsized.

  In the second aspect of the invention, the receiving part is provided on the lid, and the positional relationship between the opening and the receiving part can be maintained with high accuracy. Therefore, the recovery rate of the cleaning water in the receiving part is increased, and more necessary cleaning is performed. The amount of water can be reduced.

  3rd invention is equipped with the tableware basket which sets to-be-cleaned objects, such as tableware, and a receiving part is provided in the said tableware basket, and can take the length of the raised water column as long as possible, and it is finer. A large amount of generation can be taken.

4th invention is provided with the door body which opens and closes the opening part of a washing tank, and a receiving part is provided in the said door body, In order to increase the scattering amount of washing water, it is until it interrupts with a receiving part from the water surface. The water column is desired to be as long as possible. However, if the water column is lengthened, the water in the water column becomes particles and the washing water scatters over a wide area. Therefore, when receiving the water column as a receiving unit to wide door body area, it is possible to recover more of the washing water, without reducing the recovery of the washing water, it is possible to increase the amount of fine particles generated . Further, the receiving portion can be configured without providing a separate body, and the number of parts can be reduced and the cost can be reduced.

In the fifth invention, the receiving part is provided in the cleaning tank, and in order to increase the scattering amount of the cleaning water, it is desired to take the length of the water column from the water surface until it is blocked by the receiving part as long as possible. The water in the water column becomes particles, and the washing water is scattered over a wide area. Therefore, when receiving the water column as a broad cleaning tank receiving portion of the area, it is possible to recover more of the washing water, without reducing the recovery of the washing water, it is possible to increase the amount of fine particles generated . It is also possible to configure the receiving unit without providing a separate, thereby be reduced and cost reductions in the number of parts.

  In the sixth aspect of the present invention, the receiving part is made of metal, and it is possible to prevent the receiving part from being damaged, for example, by being in contact with a water column carrying ultrasonic vibration energy.

(Embodiment 1)
FIG. 1 is a main cross-sectional view of a dishwasher according to a first embodiment of the present invention, FIG. 2 is a main part cross-sectional view, and FIG. 3 is a main part plan view. In the figure, the dishwasher body 20 is provided with a washing tub 22 that can be opened and closed by a door 21, and an object to be cleaned 23 such as tableware is set in a tableware basket 24 and accommodated in the washing tub 22. The water supply valve 25 supplies cleaning water to the cleaning tank 22. The cleaning pump 26 pressurizes the cleaning water, supplies it to a cleaning nozzle 27 provided with a plurality of injection holes, and performs the first cleaning by spraying the cleaning water from the cleaning nozzle 27. At the bottom of the cleaning tank 22, there is a drain port 28 communicating with the suction side of the cleaning pump 26, and the drain port 28 is provided with a residue filter 29 for collecting residue. Further, a heating element 30 for heating is provided, and a temperature sensor 31 for detecting the temperature of the cleaning tank 22 is provided. The drainage pump 32 discharges the cleaning water in the cleaning tank 22. The blower 33 sends air to the cleaning tank 22 through the blower path 34 and discharges the exhaust from the exhaust port 35.

  Inside the front edge of the opening of the cleaning tank 22 are provided with a cleaning water storage unit 36 for storing cleaning water having a high detergent concentration, and an ultrasonic vibration unit 37 for atomizing the cleaning water and scattering it. The ultrasonic vibration unit 37 includes an ultrasonic vibrator 38 that converts electrical energy into mechanical vibration, and a cover body 39 that covers the ultrasonic vibrator 38 is provided. The cover body 39 is filled with pure water, antifreeze liquid, or the like. Liquid 40 is enclosed. The ultrasonic cleaning unit 37 is driven to atomize the cleaning water and scatter it to perform the second cleaning. Further, a lid 41 is provided so as to cover the ultrasonic transducer 38, and the lid 41 is provided with a detergent insertion portion 42 for introducing a detergent into the cleaning water storage portion 36. It enters into the detergent container 36 a in the container 36. In addition, a communication portion 43 that communicates between the cleaning water storage portion 36 and the cleaning tank 22 is provided by cutting out a part of the wall surface of the cleaning water storage portion 36. Here, the cover 41 covering the ultrasonic vibration unit 37 means that at least the vertical upper portion of the ultrasonic vibration unit 37 is covered.

  FIG. 4 is a perspective view of the cleaning water storage unit 36 and the lid 41 viewed from the inside of the cleaning tank 22. When the ultrasonic vibrator 38 is vibrated in water, the water surface rises and the water jumps out of the water surface. This raised washing water A (referred to as a water column) is contained in the washing water storage unit 36. It is structured to collect. The lid 41 is provided with a receiving portion 44 that directly receives the raised water column, and a washing water collection portion 45 that returns the collected washing water to the detergent charging portion 42 is integrally formed. As shown in the cross-sectional view of FIG. 5, the structure inside the lid body 41 is separated from the water surface C above the ultrasonic vibration unit 37 by a rib 46 at a position B where the recovered cleaning water lands. The bottom 47 of the detergent container 36a (below the detergent loading part 42) into which the detergent is charged is formed so that the ultrasonic vibration part 37 side (the right side in FIG. 5) is lowered. At the same time, the bottom 47 of the detergent container 36a is formed so that the position side B (the right side in FIG. 5) where the recovered washing water lands is lowered.

  As a basic operation of the dishwasher, an object to be cleaned 23 such as tableware is set in a tableware basket 24 and stored in a washing tub 22, and after the detergent is introduced, the door 21 closes the opening of the dishwasher main body 20. Start driving. A cleaning process for removing dirt from the object to be cleaned 23, a rinsing process for washing off the adhered detergent and residue, and a drying process for drying the water adhering to the object to be cleaned 23 are performed in this order.

  The operation and action of the cleaning process, which is a characteristic process of the present invention, will be described. First, the user puts the detergent into a predetermined detergent charging part 42, and the detergent enters the detergent container 36a of the cleaning water container 36. As shown in FIG. 2, various configurations are conceivable, such as a configuration in which a user directly enters the washing water storage unit 36, a configuration in which the user is transported through a passage, and a configuration in which the transport is performed in conjunction with a door closing operation. In any case, it suffices for the detergent to enter the washing water container 36. In order for the user to put the detergent in a predetermined place, it is also effective means to write “detergent container” or the like in the detergent insertion part 42 or to change the color of the surrounding parts.

  When the door 21 is closed and the operation is started, first, second cleaning is performed in which the cleaning water in the cleaning water storage unit 36 is scattered. The water supply valve 25 operates to supply water to the cleaning tank 22, and at the same time, supplies water to the cleaning water storage unit 36 through the communication unit 43. The size and water supply level of the cleaning water storage unit 36 are set so that the cleaning water storage unit 36 contains about 10 to 200 cc of detergent, preferably about 10 to 100 cc of water. When the cleaning water is circulated by the cleaning pump 26 as before, the detergent is dissolved in about 2.5 L to 4 L of water. Therefore, in the second cleaning, the first cleaning water is ejected from the cleaning nozzle 27. It is possible to generate wash water about 10 to 100 times larger than the detergent concentration of the wash water at the time of washing.

  Openings provided on both sides of the lid 41 by vibrating the ultrasonic vibrator 38 and transmitting the vibration to the cleaning water in the cleaning water storage unit 36 via the sealing liquid 40 and the cover body 39. It is made to scatter in the washing tank 22 from 41a. Unlike conventional cleaning, since cleaning water is atomized and scattered, even when the amount of cleaning water is extremely small, such as 100 cc or less, it can be attached to the entire surface of the object to be cleaned 23, and the amount of detergent used It is possible to use cleaning water with a very high concentration without increasing the amount of water.

  However, when the cleaning water is scattered using the ultrasonic vibrator 38, the cleaning water is raised from the surface as shown in FIG. The raised cleaning water A is called a water column, and the amount of water in the water column is much larger than the amount scattered in the cleaning tank 22. For example, when a scattering amount of 3 cc is obtained per minute, a water column of about 200 cc is generated per minute. For this reason, when a water column jumps out of the washing water storage unit 36, a much larger amount of washing water is required than the scattering amount necessary for washing. For example, if it is operated for 10 minutes, 2 L of washing water is required, and the amount of water is not so different from that of the first washing that is conventionally performed. When a detergent amount equivalent to the conventional amount is used, a specific effect is obtained. I can't. If the washing water is collected in the washing water storage unit 36, the washing water needs only about several cc to several tens of cc necessary for atomization, and high concentration washing water can be obtained, and high washing performance can be obtained.

  Further, in the present embodiment, the communication portion 43 is provided, and when the water column is discharged to the outside of the cleaning water storage portion 36, the same amount of discharged water is discharged from the cleaning tank 22 into the cleaning water storage portion 36. Since the detergent concentration is rapidly reduced and the cleaning effect cannot be exhibited, the lid (receiving portion) 41 is provided to prevent this concentration reduction and obtain high cleaning performance. Can do.

  The particle size of the atomized cleaning water is not particularly limited. In order to spread the entire cleaning tank 22, it is desirable that the particle diameter is 100 μm or less, and if it is 20 μm or less, the cleaning tank 22 is used. A state in which fine particles drift inside can be created, and the entire surface of the object to be cleaned can be spread.

  As described above, the cleaning water with a very high concentration of several to 100 times the detergent concentration of the conventional washing water acts against the dirt, so that it reacts with the dirt by the strong action of the detergent, It can dramatically improve the cleaning performance, such as lifting dirt, and it can also clean lipstick and terrible tea astringency that could not be washed before. Further, since the cleaning power is improved, the cleaning time can be shortened and the cleaning temperature can be lowered to save energy.

  Basically, the higher the detergent concentration, the stronger the power to remove dirt, so the higher the concentration of cleaning water, the better. Even if there is a factor that inhibits cleaning at a high concentration, the first cleaning performed later does not cause any particular problem because the cleaning is performed at a detergent concentration equivalent to the conventional one. In addition, in order to produce such a high concentration of wash water using the same amount of water as before, it is necessary to use a large amount of detergent such as several to 100 times, which is preferable from the viewpoint of the economy and the global environment. It goes without saying that there is nothing.

  The lid 41 is necessary to protect the ultrasonic vibration unit 37 from foreign matters and dirt during operation, or damage due to dropping of tableware, etc. In order to reduce the size of the apparatus, the lid 41 should be as small as possible. . However, if the generated water column is blocked at a short distance for the purpose of miniaturization, there is a problem that the amount of fine particles scattered is reduced.

  Therefore, the lid 41 is provided with an opening 41a of a predetermined size, passes through the opening 41a, discharges the water column once to the outside of the lid 41, and the wash water is supplied to the receiving portion 44 outside the lid 41. Receiving and recovering the cleaning water again in the cleaning water storage unit, while protecting the ultrasonic vibration unit 37, the lid 41 is small and can generate a large amount of scattered cleaning water, Higher cleaning performance can be obtained by spreading a large amount of cleaning water over the entire cleaning tank 22.

  Further, since the receiving portion 44 is provided on the lid 41 and the positional relationship between the opening 41a and the receiving portion 44 can be maintained with high accuracy, the recovery rate of the cleaning water at the receiving portion 44 is increased, and more necessary cleaning water is obtained. The amount of water can be reduced. Note that the receiving portion 44 can be formed integrally with the lid body 41. Moreover, it can also provide in the tableware basket 24 other than the cover body 41, and the door body 21, or can form integrally, and the same effect is acquired.

  Moreover, as shown in FIG. 3, the side surface of the lid body 41 is provided with a fine particle passage portion 41b through which atomized washing water passes, and the washing water is scattered from other than the opening portion 41a, and a larger amount of the washing water is scattered. The cleaning performance can be further improved by scattering the cleaning water into the cleaning tank 22. Here, the fine particle passage portion 41b is provided on the side surface on the opposite side of the detergent charging portion 42, and the lid is cleaned while protecting the ultrasonic vibration portion from the detergent charged in the detergent charging portion and scattering. A large amount of water can be taken.

  In this embodiment, there is no dedicated means for dissolving the detergent, and there is a possibility that a predetermined high concentration cannot be obtained from the beginning. However, the heating element 30 for heating the inside of the cleaning tank 22 is energized. The temperature of the cleaning water storage unit 36 is raised through the communication unit to promote the dissolution of the detergent, or the receiving unit 44 and the cleaning water recovery unit 45 are brought into contact with the detergent into which the recovered cleaning water has been introduced. By adopting a configuration to collect, it is possible to increase the concentration of the detergent, such as stirring the detergent and promoting dissolution of the detergent, and there is no problem if washing water having a predetermined concentration that exhibits a washing effect can be obtained. For example, in the present embodiment, by providing the bottom 47 of the detergent container 36a with an inclination or by providing the rib 46, the contact efficiency between the collected washing water and the detergent can be increased, and washing water with a higher concentration can be generated. I am doing so.

  In addition, the concentration of the cleaning water is maximized by completely dissolving the introduced detergent, but even if a part of the detergent remains undissolved in the cleaning water storage unit 36, the concentration of the predetermined concentration that exhibits the cleaning effect is obtained. If washing water is obtained, there is no problem.

  In order to disperse the spray water that has been atomized and scattered throughout the entire cleaning tank 22 and to adhere to the entire tableware, a means for convection of the air in the cleaning tank 22 using natural convection by heating is considered. It is done. For example, the heating element 30 for heating the cleaning tank 22 can be heated continuously or intermittently to stir the air in the cleaning tank 22 and promote the adhesion of the cleaning water to the tableware.

  As shown in FIG. 6, the concentration of the cleaning water can be increased by providing a stirrer as the detergent dissolving means 47, and the air in the cleaning tank 22 is agitated by providing a blowing means as the scattered particle driving means 48. It is also possible to improve the adhesion to tableware and the like, and the cleaning performance can be improved by using a higher concentration and a larger amount of cleaning water.

  After performing the second cleaning in which the high-concentration detergent liquid is atomized and scattered in the cleaning tank 22 for a predetermined time, the cleaning pump 26 is operated, and cleaning water is sprayed from the cleaning nozzle 27 to perform the first cleaning. Execute. At this time, the cleaning water and the detergent remaining in the cleaning water storage unit 36 are mixed with the cleaning water used in the first cleaning. If the cleaning water sprayed from the cleaning nozzle 27 enters the cleaning water storage portion 36, the cleaning water flows out from the communication portion 43. Therefore, the first cleaning is performed without using any special means. It becomes possible to use it.

  In the first cleaning, the cleaning water is jetted to cause the mechanical force to act on the dirt, so that sufficient cleaning performance can be obtained even for the dirt that has a large mechanical force such as sticking and contributes to the cleaning. In addition, in the second cleaning performed in advance, it is possible to remove dirt that has been peeled off from the tableware due to the chemical force of the detergent, and dirt that has not been completely removed even though the adhesion has weakened. .

  In order to obtain strong cleaning performance using only the first cleaning by the cleaning nozzle 27 equivalent to the conventional one, it is necessary to apply high energy such as increasing the water pressure of the cleaning pump 26. Although it is not preferable in terms of size and driving noise, it is not preferable, but by using both the first and second cleaning, higher cleaning performance than before can be obtained with the same cleaning pump and amount of detergent. be able to.

  In the cleaning by the first cleaning, the heating element 30 such as a sheathed heater provided in the cleaning tank 22 is energized and the cleaning water is heated as in the conventional case. Further, the temperature sensor 31 detects the temperature of the cleaning tank 22 and stops the energization of the heating element 30 when the temperature becomes higher than a predetermined temperature.

  The washing water passes through the residue filter 29 and is sucked into the washing pump 26, supplied to the washing nozzle 27 provided in the washing tank 22 from the washing pump 26, and sprayed into the washing tank 22 to wash the dishes 23. Then, it circulates along the route of returning to the drain port 28 again. At this time, the residue dropped from the tableware 23 flows into the residue filter 29 together with the washing water, and the residue having a size that cannot pass through the residue filter 29 is collected by the residue filter 29.

  When the predetermined cleaning is completed, the cleaning water containing dirt is discharged out of the apparatus by the drainage pump 32, and the cleaning process ends. Subsequently, the cleaning water is newly supplied, the cleaning pump 26 is operated, and the cleaning water is sprayed again from the cleaning nozzle 27 to perform the rinsing process of the object 23 to be cleaned, such as detergent and leftovers. After the operation for a predetermined time, the operation of discharging the cleaning water and supplying the cleaning water again is repeated, and this rinsing process is continuously performed about three times. Finally, the washing water is discharged outside the apparatus, and the rinsing process is completed.

  Subsequently, by performing a drying process and operating the blower 33, the outside air is blown into the cleaning tank 22 through the blower path 34 and is discharged from the exhaust port 35. At this time, the heating element 30 is energized, and evaporation of water droplets adhering to the object to be cleaned 23 is promoted by the effects of both air blowing and temperature. These drying steps are performed for a predetermined time, and the operation is terminated.

  In the case of scattering fine particles using the ultrasonic vibrator 38, the vibrator is generally installed in a tilted manner rather than vertically upward. When installed vertically upward, the water that rises and jumps out of the water surface falls to the same place, reduces the generation of water columns, and consequently reduces the amount of mist. .

  In addition, since the energy of the ultrasonic wave is on the generated water column, there is a risk of damage such as the lid 41 being melted. However, if the water column 44 is made of metal such as a stainless steel plate, the damage may occur. Can be prevented. Although not particularly illustrated, a metal plate can be disposed at a portion where the water column contacts, or the entire lid 41 can be made of metal, and the configuration is not particularly limited.

  The ultrasonic vibration unit 37 is configured to cover the ultrasonic vibrator 38 with the cover body 39, thereby preventing cleaning water containing detergent or dirt from directly touching the ultrasonic vibrator 38 and attaching contamination or the like. This prevents the ultrasonic vibrator 38 from becoming unable to oscillate. However, even when the ultrasonic vibrator 38 is installed so as to directly touch the cleaning water without using the cover body 39 as shown in FIG. 7, there is no problem in the function of scattering the cleaning water, and depending on the installation location and shape, It is also possible to use the ultrasonic transducer 38 by exposing it.

  In the operation sequence of the present embodiment, the second cleaning is performed before the first cleaning. First, dirt is floated by the cleaning water having a high detergent concentration, and then the machine by the cleaning pump 26 is used. By performing powerful cleaning, particularly efficient cleaning can be performed for thin dirt, but it is needless to say that higher cleaning power can be obtained for all dirt.

  Also, the arrangement and number of the cleaning nozzles 27 used in the first cleaning, the form of the rotating nozzles, etc. are not limited, and high cleaning can be achieved by arranging them on the back surface, side surface, top surface, etc. in addition to the bottom of the cleaning tank 22. Performance can also be obtained. In addition, the cleaning water is not sprayed from all the cleaning nozzles 27 at the same time, but using a water distribution means (not shown) for switching the flow path of the cleaning water between the cleaning pump 26 and the cleaning nozzle 27, It is also possible to perform the first cleaning with a small amount of water by sequentially injecting.

  The present invention relates to a washing method for a dishwasher, and does not limit the shape and size of the dishwasher body 20, the opening / closing method of the door 21, the arrangement of dishes, the arrangement of individual components, and the like. Although the configuration of a desktop type dishwasher is shown in the figure, it can also be used for a built-in type dishwasher that is attached to a sink or the like. Moreover, although the example of the dishwasher which has a drying function was shown in Embodiment 1, the same effect is acquired also in the dishwasher which does not accompany a drying function.

(Embodiment 2)
FIG. 8 is a main cross-sectional view of the dishwasher according to the second embodiment of the present invention, and the basic configuration is the same as FIG. The receiving part 44 is provided in the tableware basket 24. Although the action and effect are the same as in the first embodiment, the length of the raised water column can be as long as possible, and the amount of fine particles generated can be increased. In addition, although the receiving part 44 was installed separately in the tableware basket, it can also be comprised integrally.

(Embodiment 3)
FIG. 9 is a main cross-sectional view of the dishwasher according to the third embodiment of the present invention, and the basic configuration is the same as FIG. The receiving portion 44 is the door body 21. In order to increase the amount of washing water scattered, it is desired to make the length of the water column as long as possible from the surface of the water until it is blocked by the receiving portion. However, if the length is increased, the water in the water column becomes particles and the washing water is scattered over a wide area. Therefore, if the water column is received as the receiving portion 44 having a large area, more washing water can be collected, and the amount of generated fine particles can be increased without reducing the amount of washing water collected. Can do. Further, the receiving portion can be configured without providing a separate body, and the number of parts can be reduced and the cost can be reduced.

  Although not shown, the same effect can be obtained by installing the cleaning water storage portion 36 near the wall surface of the cleaning tank 22 and using the wall surface of the cleaning tank 22 as a receiving portion instead of the inner surface of the door body 21. It is done.

  As described above, the dishwasher according to the present invention can improve the cleaning performance without increasing the amount of detergent and jet energy, and can remove dirt that could not be washed conventionally. Is also applicable.

Main sectional drawing of the dishwasher of Embodiment 1 of the present invention Cross section of the main part of the dishwasher Top view of the main part of the dishwasher Perspective view of the main part of the dishwasher Cross section of the main part of the dishwasher Sectional drawing of the principal part of the other dishwasher of Embodiment 1 Sectional drawing of the principal part of the other dishwasher of Embodiment 1 Sectional drawing of the principal part of the dishwasher of Embodiment 2 of this invention Sectional drawing of the principal part of the dishwasher of Embodiment 3 of this invention Main sectional view of a conventional dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Door body 22 Washing tank 24 Tableware basket 36 Washing water accommodating part 37 Ultrasonic vibration part 41 Cover body 41a Opening part 44 Receiving part 45 Washing water collection | recovery part

Claims (6)

A cleaning tank for storing objects to be cleaned such as tableware, a cleaning water storage unit for storing cleaning water, a detergent charging unit for putting detergent into the detergent storage unit in the cleaning water storage unit, and the cleaning water storage unit and ultrasonic vibration unit to atomize the wash water contained is scattered in the cleaning tank, said a lid member for covering the ultrasonic vibrating unit, an opening in the cover provided in front Symbol ultrasonic vibrations comprising a receiving portion for receiving the more wash water raised to the water surface of the wash water contained in the washing water holding portion to the vibration of the parts on the outside of the opening, the contact with the washing water to the receiving unit the detergent supply part A dishwasher provided with a washing water recovery unit for returning to the washing water and configured to guide the washing water collected by the washing water collection unit to the detergent container in the washing water container. The dishwasher according to claim 1, wherein the receiving portion is provided on the lid. The dishwasher according to claim 1, further comprising a tableware basket for setting an object to be cleaned such as tableware, and a receiving part provided in the tableware basket. The dishwasher of Claim 1 provided with the door body which opens and closes the opening part of a washing tank, and the receiving part was provided in the said door body. The dishwasher according to claim 1, wherein the receiving part is provided in the washing tank. The dishwasher according to any one of claims 1 to 5, wherein the receiving part is made of metal.

Images