JP4075860B2 - 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. 12 (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 surface of the water (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.

  An object of the present invention is to solve the above-described conventional problems, and to increase the cleaning performance without increasing the amount of detergent and jet energy and to remove dirt that could not be washed conventionally.

In order to solve the above-described conventional problems, a cleaning tank for storing objects to be cleaned such as tableware, a cleaning water storage unit for storing cleaning water , and a detergent storage unit in the cleaning water storage unit a detergent supply unit, and the ultrasonic vibration unit to atomize the wash water contained in the washing water holding portion is scattered into the cleaning tank, the housed more the washing water holding portion to the vibration of the ultrasonic vibration unit A cleaning water recovery unit that returns the cleaning water raised above the surface of the cleaning water to the detergent charging unit, and guides the cleaning water recovered by the cleaning water recovery unit to the detergent storage unit in the cleaning water storage unit By configuring the raised cleaning water in the cleaning water storage unit, the same effect is obtained if there is a very small amount of cleaning water equivalent to or greater than the amount of splash required for cleaning. Can produce a very small amount of washing water with a small amount of detergent Lever, alkali, surfactant, detergent components such as bleaches, act against dirt at very high concentrations conventionally, it is possible to remove the strongly stains.

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 collected by the cleaning water recovery unit to the detergent storage unit in the cleaning water storage unit. Washing performance can be further improved by promoting dissolution of the detergent by the action of stirring the flow and the detergent, and generating and scattering higher-concentration washing water in the washing water container.

The dishwasher of the present invention stirs the detergent by flowing the water flow over the surface of the detergent without increasing the amount of detergent to be used and the jetting energy, even when the washing water is scattered using the ultrasonic vibration unit. The action promotes dissolution of the detergent, and a higher concentration of cleaning water is generated and scattered in the cleaning water storage unit , thereby improving the cleaning performance and removing dirt that could not be washed conventionally.

1st invention is a washing tank which accommodates to-be-washed objects, such as tableware, a washing water storage part which stores washing water, and a detergent input part for putting detergent into a detergent storage part in the washing water storage part an ultrasonic vibration portion which atomized the washing water contained in the washing water holding portion is scattered into the cleaning tank, the wash water the housed more the washing water holding portion to the vibration of the ultrasonic vibration unit A cleaning water recovery unit that returns the cleaning water raised from the water surface to the detergent charging unit, and 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 Therefore, it is sufficient if there is a very small amount of washing water that is equal to or greater than the amount of scattering required for washing, and the amount of washing 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 collected by the cleaning water recovery unit to the detergent storage unit in the cleaning water storage unit. Washing performance can be further improved by promoting dissolution of the detergent by the action of stirring the flow and detergent, and generating and scattering higher-concentration washing water in the washing water container. 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.

  The second invention is configured to guide the recovered cleaning water to the bottom of the cleaning water storage unit, and the detergent put into the cleaning water storage unit is accumulated at the bottom of the cleaning water storage unit, By guiding the collected cleaning water to the bottom of the cleaning water storage unit, the contact efficiency with the detergent and the stirring ability are increased, so that the cleaning water can be efficiently dissolved and cleaning water having a high detergent concentration can be generated. Moreover, even if the dissolution of the detergent progresses and the remaining amount of the detergent is small, the dissolution promoting effect can be sufficiently exerted, and a high detergent concentration can be maintained.

Third invention, the bottom of the washing agent storage unit is for ultrasonic vibrating unit side is formed to be lower, put detergent gathered the ultrasonic vibration portion, the ultrasonic vibration unit near the detergent Since the detergent concentration is in a high state due to the contact, high-concentration detergent water can be scattered in the washing tank in the washing water container, and the washing performance can be improved.

A fourth invention, the bottom of the washing agent storage unit is intended position side which recovered wash water impinges is formed so as to be lower, gatherings detergents low side of the portion detergent is turned on, the upper By dropping the washing water onto the portion, the contact efficiency with the detergent and the stirring ability are further increased, and the washing water can be efficiently dissolved to produce washing water having a high detergent concentration.

5th invention provides the communicating part which connects a washing water accommodating part and a washing tank, and the said communicating part was formed so that it might be located under the surface of washing water, and it washes by providing a communicating part. By supplying water to the tank, water for dissolving the detergent can be supplied into the washing water container, and there is no need to provide a dedicated water supply valve. Further, if the water in the cleaning tank is drained, the cleaning water in the cleaning water storage section can be discharged at the same time, and a dedicated drain means is not required. However, since the cleaning water having a high detergent concentration generated in the cleaning water storage unit diffuses or flows out into the cleaning tank, the concentration of the detergent tends to be thin. Therefore, by connecting the communication part only under the surface of the water, the function of the communication part can be reduced while reducing the area of the communication part and discharging the cleaning water accumulated in the washing water storage part at the time of drainage, and suppressing the decrease in detergent concentration Can be fulfilled.

6th invention provides the communicating part which connects a washing water accommodating part and a washing tank, and an ultrasonic vibration part is provided between the detergent accommodating part into which detergent is thrown, and the said communicating part, Even in the case where the communication portion is provided in the same manner as in the fifth aspect of the invention, a water path for collecting the water column generated by the ultrasonic vibration portion on the detergent side is formed on the opposite side of the communication portion, so that the cleaning liquid from the communication portion can be obtained. Outflow can be prevented and higher detergent concentration washing water can be scattered.

(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, when the ultrasonic vibrator 38 is vibrated in water, the water surface rises and the water jumps out of the water surface. The raised washing water A (referred to as a water column) is supplied to the washing water storage unit 36. A lid 41 to be collected is provided, and this lid 41 is provided with a detergent insertion portion 42 for introducing a detergent into the washing water storage portion 36, and the introduced detergent is placed in the detergent storage portion 36 a in the washing water storage portion 36. enter. 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.

  FIG. 4 is a perspective view of the cleaning water storage unit 36 and the lid body 41 as seen from the inside of the cleaning tank 22. The lid body 41 is provided with a receiving portion 44 that directly receives the raised water column, and is recovered. A washing water recovery unit 45 for returning the washed water to the detergent charging unit 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. Further, the ultrasonic vibration unit 37 is provided between the detergent container 36 a (bottom 47) into which the detergent is introduced and the communication unit 43.

  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 in the washing 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. However, in the case of incorrect introduction of detergent, it is important that the user put the detergent in the designated place because the washing water with the prescribed high concentration cannot be scattered and the washing performance cannot be obtained. It is also effective means to describe “detergent box” or the like in the part 42 or to change the color of the surrounding part.

  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. FIG. 5 shows a state after the detergent is supplied and water is supplied. In this state where the cleaning water is scattered, the communicating portion 43 is formed so as to be positioned below the surface of the cleaning water.

  The ultrasonic vibrator 38 is vibrated, and the cleaning water is atomized by transmitting the vibration to the cleaning water in the cleaning water storage section 36 via the sealing liquid 40 and the cover body 39, and the opening 41 a provided in the lid body 41. To the cleaning tank 22. 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.

  However, it is not possible to obtain a cleaning solution having a high detergent concentration simply by adding detergent and supplying water. If a dedicated dissolving means such as a stirring means is used, wash water with a high concentration can be easily obtained. However, as in the present invention, the water column generated by ultrasonic vibration is brought into contact with the introduced detergent. By collecting, washing water having a high detergent concentration can be generated. When a water stream flows on the surface of the detergent, the dissolution efficiency is improved, and the detergent concentration in the washing tank 22 can be increased. In addition, when the detergent is stirred by the collected water flow, dissolution is further promoted, and higher-concentration washing water can be generated and scattered in the washing water storage unit 36, thereby further improving the washing performance. Alternatively, since a high-concentration cleaning liquid can be generated in a short time, the operation time can be shortened.

  In the case where 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 when washing.

  By providing the communication portion 43, water can be supplied also into the cleaning water storage portion 36 by supplying water to the cleaning tank 22, and there is no need to provide a dedicated water supply valve or the like. Further, if the water in the cleaning tank 22 is drained, the cleaning water in the cleaning water storage section 36 can be discharged at the same time, and no dedicated draining means is required, so that the structure is simplified, reduced in size, reduced in cost, etc. Can be planned. When the water column is discharged to the outside of the washing water storage unit 36, the same amount of discharged water is supplied from the cleaning tank 22 into the cleaning water storage unit 36, so that the detergent concentration rapidly decreases and the cleaning is performed. Although the effect cannot be exhibited, by providing the lid (receiving portion) 41, this decrease in density can be prevented and high cleaning performance can be obtained.

  Moreover, if the communication part 43 exists, since the washing water of high detergent concentration produced | generated in the washing water accommodating part 36 will diffuse in the washing water stored in the washing tank 22, or will flow out, the density | concentration of detergent is thin. Although the communication part 43 is only under the surface of the water, it is possible to discharge the cleaning water accumulated in the cleaning water storage part 36 during drainage while reducing the area of the communication part 43, thereby reducing the concentration of the detergent. The function of the communication portion 43 can be achieved while suppressing as much as possible.

  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 bottom surface 47 of the detergent container 36a into which the detergent is introduced is formed so that the ultrasonic vibration part 37 side is lowered, and the detergent D that has been introduced is placed on the ultrasonic vibration part 37 side as shown in FIG. Since the vicinity of the ultrasonic vibration unit 37 is brought into a state in which the detergent concentration is high due to contact with the detergent, the detergent water having a high concentration can be scattered in the washing tank 22 in the washing water storage unit 36, and the cleaning performance is improved. It can be improved. Furthermore, the bottom surface 47 of the detergent container 36a into which the detergent is introduced is formed so that the position B where the collected washing water lands is lowered, and the detergent is placed on the lower side of the part into which the detergent D is introduced. By gathering and dropping the washing water onto the upper portion B, the contact efficiency with the detergent and the stirring ability are further increased, the washing water can be efficiently dissolved, and washing water with a high detergent concentration can be generated.

  Further, the cleaning water collected by the rib 46 is allowed to land on B when it is isolated from the water surface C above the ultrasonic vibration unit 37. If the recovered cleaning water lands on the water surface near the ultrasonic vibration unit 37 and does not make much contact with the detergent accumulated at the bottom and flows up the water surface and rises again as a water column, the cleaning water is recovered by collecting the water column. It becomes impossible to increase the concentration of. Therefore, as shown in FIG. 5, the water surface C above the ultrasonic vibration unit 37 and the water surface at the landing position B of the recovered water are blocked by the rib 46, thereby generating a circulation flow as indicated by the arrow in FIG. It is possible to efficiently stir the detergent D collected at the bottom of the water storage part 36 and increase the detergent concentration. In particular, if the cleaning water is guided to the bottom of the cleaning water storage unit 36, a higher effect can be obtained.

  A communication part 43 that communicates the cleaning water storage part 36 and the cleaning tank 22 is provided, and the ultrasonic vibration part 37 is provided between the detergent storage part 47 into which the detergent is introduced and the communication part 43. By forming a water circulation path (arrow) for collecting the water column generated by the vibration part 37 to the detergent side on the opposite side of the communication part 43 with the ultrasonic vibration part 37 interposed therebetween, the flow of water on the communication part 43 side As much as possible, it is possible to prevent the cleaning liquid from flowing out from the communication portion 43 and to disperse cleaning water having a higher detergent concentration.

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

  In order to further promote the dissolution of the detergent, it is also an effective means to energize the heating element 30 for heating the inside of the washing tank 22 and raise the water temperature in the washing water storage part 36 through the communication part or the like. .

  Further, the heat of the heating element 30 is used to convect the air, and the cleaning water that has been atomized and scattered can be distributed throughout the cleaning tank 22 to be attached to the entire tableware. 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 cleaning water to the tableware. It can be improved.

  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 stains that have been peeled off from the tableware due to the chemical force of the detergent, and stains that have not been able to be 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 addition, since the energy of ultrasonic waves is on the generated water column, the lid body 41 may be dissolved and damaged, but the place where the water column abuts (the receiving portion 44) is made of metal such as a stainless steel plate. This can prevent damage. Moreover, a metal plate can be arrange | positioned in the part which a water column contacts, and the whole cover body 41 can also be comprised with metal, and a structure is not specifically limited.

  In addition, the smaller the gap between the lid 41 and the detergent water storage unit 36 and the gap between the rib 46 and the detergent water storage unit 36, the smaller the possible number of leaks in the flow of cleaning water and the higher the detergent dissolution efficiency. However, even if there is a slight gap, there is no particular problem as long as a predetermined detergent concentration can be obtained.

  Further, in the present embodiment, the lid body 41 and the receiving portion 44 are used to collect the raised washing water. However, as shown in FIG. 7, the inner surface of the door body 21 can be used as a receiving portion. If there is no problem in size, there may be a configuration in which the water is directly collected in the washing water storage unit 36 as shown in FIG. There is no functional problem.

  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 is directly installed in the cleaning water without using the cover body 39, there is no problem in the function of splashing the cleaning water, and the ultrasonic vibrator 38 is exposed depending on the installation location and shape. It is also possible to use 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. 9 is a cross-sectional view of the main part of the dishwasher according to the second embodiment of the present invention, which is a cross-sectional view inside the lid body 41, and includes a rib 48 in addition to the rib 46, and the recovered washing In this configuration, water is guided to the bottom 47 of the washing water storage unit 36.

  Since the detergent put into the cleaning water storage unit 36 is deposited on the bottom 47 of the cleaning water storage unit 36, the recovered cleaning water is guided to the bottom 47 of the cleaning water storage unit 36 so that the contact efficiency with the detergent and stirring The capacity is increased, the washing water can be efficiently dissolved, and washing water having a high detergent concentration can be generated. As indicated by the arrows in the figure, the recovered washing water passes through the passage formed between the ribs 46 and 48 and reaches the bottom 47 of the washing water storage section 36, so that a larger amount of water comes into contact with the detergent. , The detergent concentration can be increased. Moreover, even when the dissolution of the detergent progresses and the remaining amount of the detergent is small, the dissolution promoting effect can be sufficiently exerted, and a high detergent concentration can be maintained.

  In FIG. 9, only the left and right ribs 46 and 48 are shown. However, by forming ribs or corresponding portions on the front side and the other side of the figure, more washing water is brought into contact with the detergent. Stirring power can be increased.

  In addition, the rib for guiding the flow of the cleaning water to the bottom may be installed on either the lid 41 side or the cleaning water storage unit 36 side, and the ribs installed on both sides form a water channel. Even if it is effective. In this case, a slight leak may occur in the path, but there is no problem if a predetermined detergent concentration is selected even if the structure is slightly leaked.

(Embodiment 3)
FIG. 10 is a cross-sectional view of a main part of a dishwasher according to a third embodiment of the present invention, and FIG. 11 is a plan view of the main part. It is an example at the time of making the cover body 41 into another shape.

  In the first embodiment, as shown in FIG. 2, the washing water that has jumped out of the lid 41 is received by the receiving portion 44, and the washing water is passed through the washing water collecting portion 45 to guide the washing water to the detergent charging portion 42 side. However, in FIG. 10 and FIG. 11, a path 41 d is provided inside the lid 41 to guide the cleaning water to the detergent charging part 42 side.

  With this configuration, the same effect as in the first embodiment can be obtained. Further, in order to prevent the water column from jumping out from the lid body 41, a large number of small openings 41b and 41c are provided on the side surface of the lid body 41 close to or adjacent to the portion that receives the water column so that the atomized cleaning water is scattered. it can. Accordingly, since there is no large opening in the lid body 41, it is possible to prevent foreign matters such as residue from entering the lid body 41 during the first cleaning step. Further, the cleaning water recovery configuration can be made smaller.

  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 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 Top view of the main part of the dishwasher Main sectional view of a conventional dishwasher

Explanation of symbols

22 Washing tank 36 Washing water storage section 36a Detergent storage section 37 Ultrasonic vibration section 42 Detergent input section 43 Communication section

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 an ultrasonic vibration portion which wash water is atomized to be accommodated is scattered in the cleaning tank, the cleaning, which was raised from the water surface of the washing water the housed more the washing water holding portion to the vibration of the ultrasonic vibration unit A dishwasher comprising a washing water recovery unit for returning water to the detergent charging unit, and configured to guide the washing water collected by the washing water collection unit to the detergent storage unit in the cleaning water storage unit . The dishwasher according to claim 1, wherein the recovered washing water is guided to the bottom of the washing water storage section. Bottom of the washing agent storage unit, a dishwasher according to claim 1, wherein the ultrasonic vibrating unit side is formed to be lower. Bottom of the washing agent storage unit, a dishwasher according to claim 1, wherein the position side in which the recovered wash water impinges is formed so as to be lower. 2. The dishwasher according to claim 1, wherein a communication portion is provided for communicating the washing water storage portion and the washing tank, and the communication portion is formed to be located below the surface of the washing water. A communicating portion communicating the cleaning tank and the cleaning water holding section is provided, the ultrasonic vibration unit, Dishwasher according to claim 1, wherein provided between the communicating portion and the detergent containing portion.

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