JP4321361B2 - 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. 9 (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 all-purpose for all stains, and it is difficult to completely wash off lipstick 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.

  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, the dishwasher of the present invention includes a washing tank that contains an object to be cleaned such as tableware, a washing liquid container that contains the washing liquid, and the washing liquid is atomized and scattered in the washing tank. Cleaning liquid atomization means and heating means for heating the cleaning water stored in the cleaning tank, wherein the fine particles of the cleaning liquid scattered by the cleaning liquid atomization means flow above the heating means The cleaning performance can be improved by carrying out a process in which a cleaning liquid having a high cleaning performance such as a high detergent concentration and a high temperature is scattered in the cleaning tank and adhered to the object to be cleaned. If washing is performed with washing water with a higher detergent concentration than before, detergent components such as alkalis, surfactants, and bleaching agents will act on dirt at a higher concentration than before, and remove dirt strongly. Can do.

The dishwasher of 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. In addition, when the cleaning liquid is scattered, the heating means is energized, and when the cleaning water stored in the cleaning tank is heated by the heating means, the entire stored cleaning water is heated. A wider area at the bottom of the washing tank is heated than in the case of direct heating. The fine particles of the cleaning liquid scattered on the rising airflow generated in the wide range rise in the cleaning tank, and the cleaning liquid can be efficiently attached to the object to be cleaned in the entire cleaning tank, so that the cleaning performance is improved.

1st invention is the washing tank which accommodates to-be-washed objects, such as tableware, the washing | cleaning liquid accommodating part which accommodates washing | cleaning liquid, the washing | cleaning-liquid atomization means which atomizes washing | cleaning liquid and scatters in the said washing | cleaning tank, A heating means for heating the cleaning water stored in the tank, and a lid body that covers the cleaning liquid atomization means and has openings on both sides, and when the cleaning liquid is atomized and scattered in the cleaning tank, the cleaning is performed. the washing water which has accumulated in part of the bottom of the tank is heated by the heating means, the fine particles of the cleaning liquid scattered through the opening, the updraft washing water heated is be generated by pre-Symbol heating means, the object to be cleaned The cleaning performance can be improved by carrying out a process in which a cleaning liquid having a high cleaning performance such as a high detergent concentration and a high temperature is scattered in the cleaning tank and adhered to the object to be cleaned. When the cleaning liquid is scattered, the heating means is energized to heat the cleaning water or the air in the cleaning tank, so that convection is generated in the air in the cleaning tank. appear. By allowing the fine particles generated by the cleaning liquid atomization means to flow above the heating means, the fine particles rise on the rising airflow, and the fine particles of the cleaning liquid can be distributed to the upper part of the cleaning tank. Thereby, the cleaning liquid can be efficiently attached to the object to be cleaned at the upper part of the cleaning tank, and the cleaning performance is improved. If washing is performed with washing water with a higher detergent concentration than before, detergent components such as alkalis, surfactants, and bleaching agents will act on dirt at a higher concentration than before, and remove dirt strongly. Therefore, without increasing the amount of detergent and jet energy, it is possible to improve the cleaning performance and remove dirt that could not be washed conventionally. Thereby, a user's washing operation can be reduced. When the cleaning liquid is scattered, the heating means is energized, and when the cleaning water stored in the cleaning tank is heated by the heating means, the entire surface of the stored cleaning water is heated. A wider area at the bottom of the washing tank is heated than in the case of direct heating. The fine particles of the cleaning liquid scattered on the rising airflow generated in the wide range rise in the cleaning tank, and the cleaning liquid can be efficiently attached to the object to be cleaned in the entire cleaning tank, so that the cleaning performance is improved. Further, since the entire air in the cleaning tank is agitated, the adhesion to the object to be cleaned is improved, the cleaning effect of the cleaning liquid can be exhibited, and the cleaning performance can be improved.

In the second invention, the area of the portion for storing the cleaning water at the bottom of the cleaning tank is substantially the same as the area of the other part of the bottom of the cleaning tank. The area of the heated surface and the unheated portion is almost halved, and there is a good balance between the updraft and the downdraft in the cleaning tank, and the entire cleaning tank convects at approximately the same speed. By attaching the cleaning liquid to all the objects to be cleaned, uniform cleaning performance can be improved.

According to a third aspect of the present invention, the area of the portion for storing the cleaning water at the bottom of the cleaning tank is larger than the area of the other part of the bottom of the cleaning tank. Thus, the area of the portion where the surface is heated is larger than the area of the portion which is not heated, and the updraft is generated in a wider range than the downdraft. By widening the range in which the fine particles of the cleaning liquid settled by gravity are convected in the opposite direction (upward direction), the cleaning liquid can be attached from both the upper and lower directions of the object to be cleaned, and the cleaning performance is improved.

According to a fourth aspect of the present invention, the area of the portion for storing the cleaning water at the bottom of the cleaning tank is smaller than the area of the other part of the bottom of the cleaning tank. The surface area of the heated portion is smaller than the area of the non-heated portion, and the rising airflow is strongly generated, so that it has the ability to carry more washing water to a higher place. Even when the height of the cleaning tank is high or the object to be cleaned is packed, the cleaning liquid is efficiently attached to the object to be cleaned in the entire cleaning tank by spreading the cleaning water particles to the top of the cleaning tank. Cleaning performance is improved.

(Embodiment 1)
FIG. 1 is a main sectional view of a dishwasher according to a first embodiment of the present invention, FIG. 2 is a sectional view of an essential part, and FIG. 3 is a plan view of the inside of a washing tub. 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.

  The bottom of the cleaning tank 22 has a drain port 28 communicating with the suction side of the cleaning pump 26. The drain port 28 is provided with a residue filter 29 for collecting residue and a heating means 30 for heating. A temperature sensor 31 for detecting the temperature of the 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. The heating means 30 is arranged so as to heat the air in the cleaning tank 22 and also heat the cleaning water stored in the cleaning tank 22.

  A cleaning liquid container 36 for storing a high concentration cleaning liquid is provided inside the front edge of the opening of the cleaning tank 22, and cleaning liquid atomizing means 37 for atomizing and scattering the cleaning water. The cleaning liquid atomization means 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 finely wash and scatter the cleaning water, thereby performing the second cleaning. In addition, 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 liquid storage portion 36. In addition, a communication portion 43 that communicates between the cleaning liquid storage portion 36 and the cleaning tank 22 is provided by cutting out a part of the wall surface of the cleaning liquid storage portion 36.

  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 feeding part 42, and the detergent enters the cleaning liquid storage part 36. As shown in FIG. 2, various configurations are conceivable, such as a configuration in which a user directly enters the cleaning liquid 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. However, in any case, it suffices if the detergent enters the cleaning liquid 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, the second cleaning is performed in which the cleaning water in the cleaning liquid container 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 liquid container 36 through the communication portion 43. The size and water supply level of the cleaning liquid container 36 are set so that the cleaning liquid container 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 about 10 to 100 times more wash water than the detergent concentration of the wash water at the time of washing.

  The ultrasonic vibrator 38 is vibrated, and the cleaning water is atomized by transmitting the vibration to the cleaning water in the cleaning liquid storage section 36 via the sealing liquid 40 and the cover body 39, and the openings are formed on both sides of the lid body 41. It is scattered in 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. This raised cleaning water A is called a water column, and the amount of water in this water column is much larger than the amount scattered in the cleaning tank. 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, in the case where the water column jumps out of the cleaning liquid container 36, a much larger amount of cleaning water is required than the amount of scattering required for cleaning. 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 cleaning water is collected in the cleaning liquid storage unit 36, the cleaning water needs only several cc to several tens of cc necessary for atomization, and high-concentration cleaning water can be obtained, resulting in high cleaning performance.

  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 means 30 for heating the inside of the cleaning tank 22 is energized. The temperature of the cleaning liquid container 36 is raised through the communication part to promote the dissolution of the detergent, or the receiving part 44 and the cleaning water recovery part 45 collect the recovered cleaning water so that it comes into contact with the supplied detergent. By adopting such a configuration, it is possible to increase the concentration of the detergent, for example, by stirring the detergent and accelerating the dissolution of the detergent, and there is no problem if washing water having a predetermined concentration that exhibits a washing effect can be obtained. In addition, the concentration of the cleaning water is maximized by completely dissolving the supplied detergent, but even if a part of the detergent remains undissolved in the cleaning liquid storage unit 36, the cleaning has a predetermined concentration that exhibits a cleaning effect. If water is obtained, there is no problem.

  In addition, as shown in FIG. 4, the communication part 43 is eliminated, and a dedicated water supply means 44 and a drainage means 45 are provided to form a cleaning liquid container 36 independent of the cleaning tank 22, or a stirrer as a detergent dissolving means By providing 46, it is possible to increase the concentration of cleaning water.

  Further, when the cleaning liquid is atomized and scattered by the cleaning liquid atomizing means 37, the heating means 30 is energized to heat the air in the cleaning tank 22. In this embodiment, the cleaning water is already stored in the cleaning tank 22, and the heating means 30 heats the stored cleaning water and heats the air in the cleaning tank 22 through the cleaning water. At this time, in addition to simple heat transfer on the water surface, heat transfer due to evaporation is accompanied, but in any case, the air in the cleaning tank 22 is heated and convects. Above the heating means 30, an upward airflow is mainly generated. Here, as shown in FIG. 3, the lid body 41 is configured so that the fine particles generated by the cleaning liquid atomizing means 37 are scattered toward the upper side of the heating means 30. Ascending, the fine particles of the cleaning liquid can be spread to the upper part of the cleaning tank 22.

  Even if the fine particles of the cleaning liquid are very fine, they are water droplets having a weight and settle due to gravity, so that they tend to accumulate at the bottom of the cleaning tank 22. Therefore, it is possible to spread the fine particles up to the upper part in the cleaning tank 22 by being put on the rising air flow generated by the heating of the heating means 30. As a result, the cleaning liquid can be efficiently attached to the object 23 to be cleaned above the cleaning tank 22 and the cleaning performance is improved. In particular, the cleaning liquid can be more uniformly attached to the object to be cleaned 23 in the cleaning tank 22 without using a dedicated device such as a stirring means or a blowing means. In addition, even if it installs together using a stirring means, a ventilation means, etc., there is no problem in function.

  In addition, the convection in the cleaning tank 22 is not always formed at a fixed position and fluctuates, but there is a strong upward airflow above the heating means 30, and the cleaning liquid atomized above the heating means 30 If scattered, the above effect can be obtained.

Here, when the cleaning liquid is sprayed by the cleaning liquid atomizing means 37, the cleaning water is already supplied into the cleaning tank 22, and the heating means 30 is configured to heat the cleaning water. In addition, the same effect can be obtained even if the air in the cleaning tank 22 is directly heated and convected. The heating means 30 can be exposed without being submerged by reducing the amount of water supply or by providing the dedicated water supply / drainage means 44 and 45 to the cleaning liquid container 36 as shown in FIG.

  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, by using a cleaning solution with an extremely high concentration of several to 100 times the detergent concentration of conventional washing water against dirt, it reacts with dirt due to the powerful action of the detergent, or stains from the surface of the dishes. It can drastically improve the washing performance, such as by lifting lipsticks, and can wash 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 concentration of the detergent, the stronger the force to remove dirt, so the higher the concentration of the cleaning liquid, 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 order to produce such a high concentration cleaning solution using the same amount of water as before, it is necessary to use a large amount of detergent such as several times to 100 times, which is not preferable from the viewpoint of economy and global environment. Needless to say.

  Note that the cleaning liquid atomized by the lid 41 is configured to be scattered upward of the heating unit 30, but the liquid is not directly directed to the upper side of the heating unit 30, but is indirectly deposited. The same effect can be obtained as long as a large number of fine particles flow above the heating means 30 before the heating.

  In addition, the energization of the heating means 30 may be performed continuously during the second cleaning step, or may be performed intermittently, repeated intermittent operation by the temperature sensor 31, or only the first half is heated, There is no particular limitation, such as stopping energization at a predetermined temperature or a predetermined time, and it is only necessary to operate in an optimal mode so that the temperature does not rise too high and convection is generated.

  Further, the heating means 30 is configured to heat the cleaning water, and a wider area at the bottom of the cleaning tank 22 is heated than when the heating means 30 directly heats the air in the cleaning tank 22, and is generated in the wide range. Riding the ascending air current allows the cleaning liquid to efficiently adhere to the entire object to be cleaned in the cleaning tank 22 and improves the cleaning performance. Further, since the entire air in the cleaning tank 22 is agitated, the adhesion to the object to be cleaned is improved, the cleaning effect of the cleaning liquid can be exhibited, and the cleaning performance can be improved.

  FIG. 3 is a plan view of the inside of the cleaning tank 22, but the cleaning water is stored in the hatched area in the figure, and the area of the portion for storing the cleaning water is substantially equal to the area of the other portion of the bottom. Of the bottom surface of the cleaning tank 22, the area of the portion heated by the heating means 30 and the portion not heated by the heating means 30 are almost halved. Since the entire convection flows at substantially the same speed, the cleaning performance can be improved by adhering the cleaning liquid to all the objects to be cleaned evenly.

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 liquid container 36 are mixed with the cleaning water used in the first cleaning. The cleaning water sprayed from the cleaning nozzle 27 is the cleaning liquid container 36.
If it is configured to enter the inside, it flows out of the communication portion 43, so that it is possible to use all of the detergent first introduced for the first cleaning without using any special means.

  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 means 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. The temperature sensor 31 detects the temperature of the cleaning tank 22 and stops energization of the heating means 30 when the temperature exceeds 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 means 30 is energized, and the 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, when the fine particles using the ultrasonic vibrator 38 are scattered, the vibrator is generally installed in an inclined manner rather than vertically upward. When installed vertically upward, the water that protrudes from the surface of the water falls to the same place, reduces the generation of water columns, and as a result, reduces the amount of fog. .

  In addition, since the ultrasonic vibration unit 37 is configured to cover the ultrasonic vibrator 38 with the cover body 39, cleaning water containing detergent or dirt is prevented from directly touching the ultrasonic vibrator 38, and contamination, etc. This prevents the ultrasonic transducer 38 from becoming unable to oscillate due to the adhesion. However, even when the ultrasonic vibrator is directly installed in the cleaning water without using the cover 39 as shown in FIG. 5, there is no problem in the function of scattering the cleaning water, and the ultrasonic vibrator depends on the installation location and shape. It is also possible to use it with 38 exposed.

  In addition, although the ultrasonic vibrator is used as the cleaning liquid atomization means, other structures may be used. The cleaning liquid is pressurized and sprayed like a spray from a nozzle, or an air pump 47 as shown in FIG. Various schemes are conceivable, such as generating a high-speed flow using, and mixing and spraying a cleaning liquid and a high-speed air flow, but the method is not limited.

  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. 7 is a plan view of the inside of the washing tub of the dishwasher according to the second embodiment of the present invention. The basic configuration is the same as in FIG. 1, but the area of the portion for storing the cleaning water at the bottom of the cleaning tank 22 is made larger than the area of the other portion of the bottom of the cleaning tank 22.

  Of the bottom surface of the cleaning tank 22, the area of the portion whose surface is heated by the heating means 30 is larger than the area of the portion that is not heated, and the updraft is generated in a wider range than the downdraft. By widening the range in which the fine particles of the cleaning liquid settled by gravity are convected in the opposite direction (upward direction), the cleaning liquid can be attached from both the upper and lower directions of the object to be cleaned, and the cleaning performance is improved.

(Embodiment 3)
FIG. 8 is a plan view of the inside of the washing tub of the dishwasher according to the third embodiment of the present invention. The basic configuration is the same as in FIG. 1, but the area of the portion for storing cleaning water at the bottom of the cleaning tank 22 is made smaller than the area of the other part of the bottom of the cleaning tank 22.

  Of the bottom surface of the cleaning tank 22, the area of the surface heated by the heating means 30 is smaller than the area of the unheated part, and the upward air flow is strongly generated, so that more cleaning water is carried to a higher place. I have the ability. Even when the height of the cleaning tank 22 is high or the object to be cleaned 23 is packed, the cleaning liquid is distributed to the entire object to be cleaned in the cleaning tank 22 by spreading fine particles of cleaning water to the upper part of the cleaning tank 22. Can be attached efficiently, and the cleaning performance is improved.

  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 inside the washing tank 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 The top view in the washing tank of the dishwasher of Embodiment 2 of this invention The top view in the washing tank of the dishwasher of Embodiment 3 of this invention Main sectional view of a conventional dishwasher

22 Cleaning tank 30 Heating means 36 Cleaning liquid container 37 Cleaning liquid atomization means

Claims (4)

A cleaning tank for storing an object to be cleaned such as tableware, a cleaning liquid storage unit for storing a cleaning liquid, cleaning liquid atomization means for atomizing the cleaning liquid and splashing it into the cleaning tank, and cleaning water stored in the cleaning tank A heating means for heating and a lid body that covers the cleaning liquid atomization means and has openings provided on both sides thereof, and when the cleaning liquid is atomized and scattered in the cleaning tank, a part of the bottom of the cleaning tank the washing water which has reservoir heated by the heating means, the fine particles of the cleaning liquid scattered through the opening, before Symbol by updraft washing water heated is be generated by the heating means, dishwasher to be attached to the object to be cleaned . The area of the portion of the reservoir of washing water at the bottom of the washing tank, Dishwasher according to claim 1, wherein the substantially the same as the area of the other portion of the bottom of the cleaning tank. The area of the portion of the reservoir of washing water at the bottom of the washing tank, Dishwasher according to claim 1, wherein the set to be larger than the area of the other portion of the bottom of the cleaning tank. The area of the portion of the reservoir of washing water at the bottom of the washing tank, Dishwasher according to claim 1, wherein the set to be smaller than the area of the other portion of the bottom of the cleaning tank.

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