JP2009240545A - Dish dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the drying time by removing a prescribed amount or more of droplets from dishes without moving the dishes while keeping a state that they are installed at prescribed position. <P>SOLUTION: The dish dryer includes an ultrasonic radiation device 30 for radiating ultrasonic vibrations in the air and control means 25 for controlling the ultrasonic radiation device. The ultrasonic radiation device 30 includes: an ultrasonic vibrator 3 for vibrating a radiation plate 6 and radiating the ultrasonic vibrations in the air; ultrasonic converging means 8 provided with a roughly paraboloidal surface, for converging the ultrasonic vibrations radiated from the radiation plate to a linear or point-like focus position; and focus moving means 10 for moving the focus position of the ultrasonic vibrations converged by the ultrasonic converging means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tableware dryer for drying tableware and the like.

  Conventionally, this type of domestic tableware dryer and dishwasher dries the tableware with warm air. That is, by introducing the outside air into the drying cabinet by a blower fan, heating the air introduced by the heater, applying the dry warm air to the tableware to evaporate the water adhering to the tableware and discharging it outside the drying cabinet Dry the dishes.

  Moisture and water droplets are not uniformly attached to the tableware, and when the moss is set face down on the tableware basket, it accumulates in a concave part facing upward (for example, a thread bottom) or the tableware is placed on the tableware basket. When set to, there are large water droplets near the point of contact between the tableware and the tableware basket. On the other hand, since the dishes are set against a tableware basket, they exist as a very thin water film in a plane portion close to the vertical. Therefore, in the case of drying using warm air, the thin water film-like portion dries quickly, but the water accumulated on the yarn bottom and large water drops take time to dry, and the drying time becomes longer to remove all water drops. Tend to.

  If the drying time is prolonged due to the uneven distribution of moisture, it is inconvenient for the user, and the energy used is large and uneconomical. In addition, since the temperature of the portion where the moisture dries quickly in the tableware or the cabinet continues to rise, deformation or deterioration due to heat may occur in the case of a resin that is sensitive to heat. Further, in the portion where the large water droplet remains, the non-volatile impurities and inorganic components contained in the water droplet remain as water spots, and the finished appearance after the tableware is dried is impaired.

  In order to solve the above problems, it is necessary to remove the large water droplets and make the amount of the remaining water adhered uniformly. As a general example, it is conceivable to remove the water droplets with air. (For example, refer to Patent Document 1). By spraying high-speed air jets on the tableware, large drops of water and water collected in the depressions are removed. The removal effect is small. In addition, when the dishes are closely overlapped with each other or when the dishes are behind other dishes, the effect of removing water drops is small.

  The above problem can be solved to some extent by increasing the flow velocity and flow rate of the air jet, but on the other hand, the risk of tableware falling by the air jet increases. These problems are unavoidable for home appliances where the user is unsure how to store the dishes.

  One of the other techniques for removing the large water droplets is to make the large water droplets on the solid surface finer and scatter by a device that focuses the ultrasonic waves radiated into the air (see, for example, Patent Document 2). Unlike the above-described air jet that moves a mass of air, this method does not generate an air current, and therefore there is no problem of tableware falling. In addition, when the dishes overlap each other, a high water droplet removal effect can be expected as described later.

An outline of the above apparatus will be described with reference to FIGS. 17 and 18. A horn 102 is attached to the ultrasonic transducer 101 to increase the amplitude, and then a rectangular radiating plate 104 is attached to the rod 103 and extended perpendicularly to the rod 103. As shown by the broken line in FIG. When bending and vibrating in the long side direction, ultrasonic waves are efficiently emitted from the radiation plate 104 into the air. Since the radiation plate 104 vibrates in a mode with different phases in a striped manner in the long side direction, vibrations having opposite phases, that is, vibrations shifted by ½ wavelength are radiated from adjacent striped portions. By providing the ultrasonic focusing means 105 having a step corresponding to ½ wavelength at a position away from both surfaces or one surface of the radiation plate, the reflected ultrasonic waves are aligned in the same phase. By providing the surface of the ultrasonic focusing means 105 with respect to the radiation plate 104 in a substantially parabolic shape, the ultrasonic wave can be focused linearly or in a point shape on the focal position of the parabolic surface.

  When the ultrasonic wave propagating in the air is focused in this way, the sound pressure at the focal position increases, and when the sound pressure at the focal position exceeds approximately 3 to 5 kPa, water and water droplets can be made fine and blown away. This is because the water near the water surface is subjected to stress that causes the water surface to wave by ultrasonic waves called capillary waves. When the stress exceeds the surface tension of water, the water is refined so that the water on the water surface is torn off from the water surface.

  When several ml of water is accumulated in a dimple such as the bottom of a tableware, the water gradually becomes finer from the water surface and acts as if it evaporates rapidly. When the distance between the dishes is short, the ultrasonic waves that have entered the gaps between the dishes have the property of repeatedly reflecting and entering the back. Therefore, when a plurality of dishes are arranged substantially vertically at a predetermined pitch, it can be expected that if the ultrasonic wave is focused on the upper end of the gap, the ultrasonic wave will naturally enter the gap and drop water drops.

  When water drops are removed by airborne ultrasonic waves with a large number of dishes arranged in a closed drying cabinet, some of the water droplets that have been made fine and scattered fall to the bottom of the drying cabinet due to gravity, but another part Will adhere to relatively dry parts of other dishes. Therefore, the water droplet removal according to the present technology is not a complete drying, but a means for removing large water droplets from the tableware, and has an effect of reducing nonuniformity of moisture distribution on the tableware or in the drying cabinet. Since the above-mentioned problems such as shortening the drying time are solved by making the water distribution substantially uniform, the present technology can be positioned as a pretreatment of the drying process.

This technology has been developed mainly as an industrial drying accelerating means, miniaturizing means, or defoaming means. Since the focal point is a fixed position, the object (surface) is sent in one direction so as to pass through the focal position. The water was removed while being removed.
JP 2001-252238 A Japanese Patent Laid-Open No. 11-90330

  When the above-described water droplet removal technique using airborne ultrasonic waves is applied to a domestic dish dryer or dishwasher, it is difficult to move the entire surface of the object to be dried through the focal point. This is because it is difficult to transport tableware, which is an object to be dried, in a limited space in home appliances where the installation space must be reduced, and the tableware collapses during transfer. This is because it may be damaged.

  An object of the present invention is to remove a predetermined amount or more of water drops from the entire surface of the tableware without moving the tableware in a state where the tableware is installed in a predetermined arrangement direction or position.

  In order to solve the above-described conventional problems, the tableware dryer of the present invention includes an ultrasonic radiation device that radiates ultrasonic vibrations into the air, and a control unit that controls the ultrasonic radiation device, and the ultrasonic radiation device. The apparatus vibrates the radiation plate to emit ultrasonic vibrations into the air, and has an approximately paraboloidal surface, and the ultrasonic vibrations radiated from the radiation plate to a linear or dotted focal position. Ultrasonic focusing means for focusing, and focus moving means for moving the focal position of the ultrasonic vibration converged by the ultrasonic focusing means are provided.

  Thereby, it becomes possible to remove a predetermined amount or more of water drops from the tableware without moving the tableware in a state where it is installed at a predetermined position, and the drying time can be shortened.

  The tableware dryer of the present invention can reduce the drying time by removing a predetermined amount or more of water drops from the tableware without moving the object to be dried.

  1st invention heats the air in the said tableware basket which installs to-be-dried objects, such as tableware, the drying cabinet which accommodates the said tableware basket, the ventilation fan which introduces external air in the said drying cabinet, and the said drying cabinet A heater that radiates ultrasonic vibrations into the air, and a control unit that controls the ultrasonic radiation device, wherein the ultrasonic radiation device vibrates the ultrasonic vibrations in the air by vibrating a radiation plate. An ultrasonic transducer that radiates to an ultrasonic wave, an ultrasonic focusing unit that has a substantially parabolic surface and focuses ultrasonic vibrations emitted from the radiation plate to a linear or point-like focal position, and the ultrasonic focusing unit With the focus moving means for moving the focal position of the converged ultrasonic vibration, it is possible to remove a predetermined amount or more of water drops from the tableware without moving the tableware in a state where the tableware is installed at the predetermined position. Will be able to dry time It is possible to shrinkage. Further, in addition to scattering the water droplets at the focal position, the ultrasonic waves enter the gaps between the dishes, so that a predetermined amount or more of water drops can be removed from almost the entire surface of the tableware that is overlaid. Thereby, the water spot remaining after drying can be eliminated and the finish can be improved.

  In the second aspect of the invention, in particular, an ultrasonic radiation device is provided by providing an ultrasonic radiation unit on the side of the drying chamber of the first invention, and the focal point moving means is an ultrasonic wave radiated from the ultrasonic radiation device. By changing the traveling direction of the sonic vibration downward in the drying cabinet, the focused ultrasonic wave can be applied from the upper side of the tableware and the water droplets can be scattered downward. By minimizing the adhesion, the water droplet removal effect can be maximized, and a reliable water droplet removal effect can be exhibited.

  According to a third aspect of the invention, in particular, the ultrasonic radiation device of the first or second aspect of the invention comprises an ultrasonic transducer, a radiation plate, an ultrasonic focusing unit, and a focal point moving unit, which are integrally configured. These members that require the positional relationship to be strictly determined can be assembled with high accuracy, and stable water droplet removal performance can be exhibited.

  In a fourth aspect of the invention, in particular, the focal point moving means of the first aspect of the invention comprises a multi-plane rotating body having a large number of reflecting surfaces for converging the ultrasonic wave radiated from the ultrasonic focusing unit to a point-like focal position, The control means is configured to operate the ultrasonic vibrator while rotating the multi-sided rotating body, so that the ultrasonic traveling direction can be bent in any direction in the drying chamber and placed in the drying chamber. Water droplets can be accurately removed from the dishes.

The fifth aspect of the invention is particularly a tableware basket in which an object to be cleaned such as tableware is installed in the tableware dryer according to any one of the first to fourth aspects of the invention, and the object to be cleaned is housed in the tableware basket. A cleaning tank, a cleaning means for cleaning an object to be cleaned in the cleaning tank, a water supply means for supplying cleaning water to the cleaning tank, a drain means for discharging the cleaning water from the cleaning tank, and the cleaning tank A blower fan for introducing outside air, a heater for heating the air in the cleaning tank, an ultrasonic radiation device for radiating ultrasonic vibrations into the air, and a control means for controlling the ultrasonic radiation device, The ultrasonic radiation device includes an ultrasonic transducer that vibrates a radiation plate and radiates ultrasonic vibration in the air, and a linear or dot-like ultrasonic vibration emitted from the radiation plate having a substantially parabolic surface. Ultrasonic focusing means for focusing at the focal position, and focusing by the ultrasonic focusing means And a focus moving means for moving the focal position of the ultrasonic vibration, and the control means controls the cleaning means, the blower fan and the heater to perform the cleaning process and the drying process. It is possible to reliably remove more than a predetermined amount of water droplets remaining on the bottom of the tableware after the process, and to perform a drying process following the washing process, and to dry efficiently in a short time without moving the tableware. Can do.

  In particular, the sixth aspect of the present invention includes an ultrasonic radiation unit in which the ultrasonic radiation device according to any one of the first to fifth aspects is disposed, and a communication unit that communicates the ultrasonic radiation unit and the cleaning tank. The communication part is configured to be opened and closed by a focal point moving means constituted by a rotatable rotating reflector so that the communication part can be closed at the time of drying with warm air after splashing water droplets. It is possible to prevent the drying air from flowing into the ultrasonic radiation section. Moreover, in the thing provided with the washing | cleaning function, it can prevent that washing water flows in into an ultrasonic radiation part at the time of washing | cleaning.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a block diagram of a tableware dryer according to the first embodiment of the present invention, FIG. 2 is a top view showing the arrangement of tableware, FIG. 3 is a side view of the ultrasonic radiation device, and FIG. FIG. A cup-shaped tableware X having a thread bottom at the bottom is placed in the drying cabinet 1 so that the bottom of the yarn faces upward, and is placed in the drying cabinet 1, and the dish-shaped tableware Y has a food serving surface in the same direction. It is set against the lower tableware basket 2 and stored in the drying cabinet 1.

  Tableware Y is arranged so that the main cleaning surfaces overlap each other. Hereinafter, such an arrangement is referred to as an overlapping arrangement, and a direction indicated by an arrow A is referred to as an overlapping direction. The tableware Y is arranged in two rows in the direction of arrow A in the drying cabinet 1, and the tableware X is arranged in a direction orthogonal to the direction in which the tableware Y is installed. FIG. 6 shows an arrangement of another example of the tableware Y. The tableware Y is tilted at a predetermined angle and arranged in three rows, which is advantageous for setting a number of tableware Y. .

  The ultrasonic radiation device 30 is disposed in an ultrasonic radiation unit 31 provided on the side of the drying cabinet 1. A radiation plate 6 is provided on the vibration surface of the bolted Langevin type ultrasonic transducer 3 via a horn 4 and a rod 5 for amplifying the amplitude. The radiating plate 6 is provided so as to vibrate in a striped mode in the long side direction as indicated by a broken line b in FIG. The distance d between the radiation direction setting plate 7 and the radiation plate 6 is determined so that the ultrasonic wave propagates mainly upward from the radiation plate 6 into the air.

  The ultrasonic wave radiated into the air is reflected by the ultrasonic focusing means 8 having a substantially paraboloid, propagates in the air as shown by the broken line C, and is focused at the focal position A in the state shown in FIG. The communicating portion 9 that communicates the ultrasonic radiation device 30 and the drying cabinet 1 is provided with a focal point moving means 10 that reflects ultrasonic waves, has a movable degree of rotation, and changes the traveling direction of the ultrasonic waves.

  As shown in FIGS. 3 and 5, the focal point moving means 10 is composed of a rotatable rotating reflector provided so as to be opposed to the ultrasonic focusing means 8, and one end of the focal point moving means 10 is pivotable by a shaft portion 23. It is formed in a supported flat plate shape, and is fixed to the wall surface of the drying cabinet 1 with a shaft portion 23 so as to be positioned in the communication portion 9. The shaft portion 23 is rotationally driven in the direction of the arrow D by a driving means 24 such as a stepping motor so that the angle can be varied with respect to the ultrasonic focusing means 8, and the ultrasonic wave travels by changing the angle of the focal point moving means 10. The direction changes.

  The shaft portion 23 around which the focal point moving means 10 rotates is provided in the vicinity of the upper end of the ultrasonic focusing means 8, and by changing the angle at which the lower end rotates upward in the direction of the arrow D toward the drying chamber 1, The ultrasonic waves reflected by the sound wave focusing means 8 are provided so as to change downward in the drying chamber 1. And the ultrasonic radiation apparatus 30 has the ultrasonic transducer | vibrator 3, the radiation plate 6, the ultrasonic focusing means 8, and the focus moving means 10, and these are comprised integrally.

  The control means 25 controls the ultrasonic radiation device 30 including the control of the heater 11 and the blower fan 12 necessary for the control of the drying operation, and the focal position of the ultrasonic wave is changed from A to B, C, by the focus moving means 10. Move sequentially to D, E, F, G. A heater 11 is provided at the bottom of the drying chamber 1, a ventilation port 13 for taking in air outside the machine and a blower fan 12 are provided in the drying chamber 1, and an exhaust port 14 for discharging air containing moisture. Is provided.

  Next, the operation and action during drying in the state shown in FIG. 1 will be described. Before starting the energization of the heater 11, the energization of the ultrasonic transducer 3 is started, and the ultrasonic wave reflected by the ultrasonic focusing means 8 passes through the communication unit 9 that communicates the drying chamber 1 and the ultrasonic radiation unit 31, It is propagated as indicated by a broken line C and converges at the focal position A. The sound pressure at the focal position A exceeds the threshold of water miniaturization, and water droplets accumulated on the thread bottom of the tableware X located at the focal position A are scattered. As will be described later, when the focal position sequentially moves from A to B to G, the ultrasonic wave propagates downward while repeatedly reflecting the gaps between the plurality of dish-shaped dishes Y, and is defined by the surface shape of the dishes Y. In many positions, the sound pressure of the ultrasonic wave exceeds the threshold for miniaturization, and water droplets are repeatedly scattered.

  As a result, some of the water droplets adhering to the surface of the tableware Y fall to the bottom surface of the drying cabinet 1, and the remaining small water droplets adhere to the surface of the tableware Y relatively uniformly. Thereafter, when the temperature in the drying chamber 1 rises due to the energization of the heater 11 and the outside air is introduced from the vent hole 13 by the operation of the blower fan 12, water drops remaining on the tableware X and Y are dried. .

  The focal point moving means 10 at the start of drying rotates upward in the drying chamber 1 as shown in FIG. 1 to open the communicating portion 9 and the focal position of the ultrasonic wave is set to converge on A. . Thereafter, the focal point moving means 10 gradually rotates in a direction opposite to the ultrasonic focusing means 8 and the focal position sequentially moves from A to B, C, D, E, F, G, as shown in FIG. The focal position changes to G. The ultrasonic transducer 3 operates the ultrasonic transducer 3 for a predetermined period of time while the focal point moving unit 10 is moving.

  FIG. 8 shows a cross-sectional view of the bottom of the drying cabinet 1. The dish-shaped tableware Y and the tableware basket 2 are in contact with each other by two rod-shaped basket members 2 a, and relatively large water droplets are collected at the contact points. Cheap. An ultrasonic focusing wall 16 that is recessed in a parabolic shape is provided at the bottom of the drying chamber 1 so that the ultrasonic waves are focused along the cage member 2a. The ultrasonic waves introduced from the upper part of the drying cabinet 1 continue to be reflected between a plurality of dish-shaped tableware Y and reach the bottom of the tableware Y, but when they reach the bottom of the tableware Y, they are considerably scattered. Therefore, when the light is focused again as indicated by the arrow by the action of the ultrasonic focusing wall 16, a reliable water droplet removal effect can be obtained.

  The ultrasonic vibrator 3 does not always have to be operated for water droplet scattering, and sufficient drying performance can be exhibited even in intermittent operation. This is because, as long as the water droplet hits the focal position, the water droplet is refined almost instantly. If the ultrasonic transducer 3 is controlled to intermittently oscillate in accordance with the change of the focal position from A to G by the focal point moving means 10, the life of the radiation plate 6 and the ultrasonic transducer 3 can be extended.

(Embodiment 2)
FIG. 9 shows the ultrasonic focusing means 8 of the second embodiment, which is formed by bonding two plate-like members 13a and 13b having different thermal expansion coefficients. The operation of the movement from the focal position F1 in FIG. 9A to the focal position F2 in FIG. 9B will be described. FIG. 9A shows the state after normal temperature (at the start of drying), and FIG. 9B shows the state after the temperature is raised by the operation of the heater 11. One end portion 14 a of the ultrasonic focusing means 8 is fixed to the wall surface of the drying cabinet 1, and the other end portion 14 b is attached so as to move on the arc-shaped rail 15 provided in the drying cabinet 1 in the direction of arrow E. .

  When the temperature in the drying chamber 1 rises due to the energization of the heater 11, the ultrasonic focusing means 8 changes greatly in curvature, and the focal length changes from f1 in FIG. 9 (a) to f2 in FIG. 9 (b). Shorten. At the same time, the reflection direction of the ultrasonic wave moves slightly downward, and the bending angle is sharpened from θ1 to θ2. The ultrasonic transducer 3 and the ultrasonic focusing means 8 are controlled by the control means 25. The control means 25 controls the focal length and the reflection direction by the ultrasonic focusing means 8 as well as the control of the heater 11 and the blower fan 12 necessary for controlling the drying operation.

  As a result, the focal position moves from A to G in the drying chamber 1, and the amplified ultrasonic waves sequentially enter the gaps of the tableware Y and repeat reflection on the surface of the tableware Y to remove water droplets. Water droplets can be removed at almost all positions in the drying cabinet 1, and the drying time can be shortened compared with a conventional dryer using only warm air by applying warm air from the heater 11 and the blower fan 12. .

(Embodiment 3)
10 to 13 show the configuration of the focal point moving means 10 in the third embodiment of the present invention, and the description will focus on the differences from the first and second embodiments.

  The focal point moving means 17 is composed of a multi-faced rotating body provided on the upper wall of the drying chamber 1 so as to be rotatable in the horizontal direction. The traveling direction of the ultrasonic vibration from the sound wave focusing means 8 is changed downward in the drying chamber 1. Therefore, when the temperature in the drying chamber 1 rises due to energization of the heater 11, the curvature of the ultrasonic focusing means 8 changes, and the focal length and the traveling direction change. The traveling direction of the ultrasonic waves is further changed by being reflected by a large number of reflecting portions 17a of the focal point moving means 17, and is changed in various directions in the drying chamber 1 by the rotation of the focal point moving means 17 in the arrow direction.

  The ultrasonic focusing means 8 is configured by bonding the two plate-like members 13a and 13b having different thermal expansion coefficients described in the second embodiment, and the temperature in the drying chamber 1 is increased by energization of the heater 11. When it rises, the curvature changes greatly, and the focal length is shortened from f1 in FIG. 9A to f2 in FIG. 9B. At the same time, the reflection direction of the ultrasonic wave moves slightly downward, the bending angle is sharpened from θ1 to θ2, and the focal length and the traveling direction are changed. The ultrasonic waves from the ultrasonic focusing means 8 are reflected on the reflecting portion 17a of the rotating focus moving means 17, and are reflected in various directions in the drying chamber 1 by drawing an arc as indicated by an arrow H in FIG. It becomes possible to bend the traveling direction of the ultrasonic wave in all directions in the drying cabinet 1, and water droplets can be accurately removed from the tableware X and Y placed in the drying cabinet 1.

(Embodiment 4)
FIG. 14: shows the block diagram of the dryer with the dishwashing function in the 4th Embodiment of this invention, and it demonstrates centering on a different part from Embodiment 1-3. As with the first embodiment, the tableware X and the tableware Y are stored in the cleaning tank 18 in a predetermined overlapping direction, and also serve as a drying cabinet. The cleaning tank 18 is provided in a watertight structure so that it does not leak to the outside even if the cleaning water is jetted inside. The cleaning water in the cleaning tank 18 is pressurized by a cleaning pump 19 and is supplied from a cleaning means 20 constituted by a rotating nozzle. Sprayed toward tableware X and Y. The sprayed cleaning water gathers in the water storage section 21 provided with the heater 11, is heated by the heater 11, is pressurized by the cleaning pump 19, and circulates to the cleaning means 20.

The communicating part 9 between the cleaning tank 18 and the ultrasonic radiating part 31 is provided with a focal point moving means 10 constituted by a rotatable reflection plate, which can open and close the communicating part 9. During the cleaning, as shown in FIG. 16, the communication part 9 is closed by the focal point moving means 10, and the cleaning water sprayed by the cleaning means 20 enters the ultrasonic radiation part 31 provided with the ultrasonic radiation device 30. Is prevented. The control unit 25 controls the ultrasonic pumping device 30 and the driving unit 24 of the focal point moving unit 10 as well as the cleaning pump 19 necessary for controlling the cleaning operation.

  Next, the operation will be described. The focal point moving means 10 at the start of drying is set so that the communicating portion 9 is opened as shown in FIG. Thereafter, the focal point moving means 10 is gradually rotated so that the focal position sequentially moves from A to B, C, D, E, F, and G, and the focal position changes to G as shown in FIG. The ultrasonic transducer 3 operates the ultrasonic transducer 3 for a predetermined period of time while the focal point moving unit 10 is moving.

  Since the tableware dryer with the tableware washing function of this embodiment is cleaned by jetting cleaning water, a relatively large amount of cleaning water remains on the upper surface of the tableware X having a thread bottom after the cleaning is completed. Since the water droplets scattered by the irradiation of ultrasonic waves adhere to the tableware at a lower position, it is preferable to remove the water droplets at a portion (A) where a relatively large amount of water droplets accumulate, such as the thread bottom, at the initial stage of drying. In order to cope with a relatively large amount of remaining water, it is preferable that the focal position A oscillates ultrasonically for a longer time than other focal positions.

  The heater 11 and the blower fan 12 are started to operate simultaneously with the start of drying. While the water droplets are removed by the aerial ultrasonic wave, the output of the blower fan 12 is made relatively small so that the water drops fall on the bottom of the cleaning tank 18. It is easy to do and is preferable for drying. The rotational speed of the blower fan 12 is maximized after the focal position of the ultrasonic wave moves to G and the water droplet removal is completed. By using both evaporation by warm air and water droplet removal by ultrasonic waves, drying can be performed in a short time with only warm air without heating the rinse water by the heater 11 during the rinsing process.

  As described above, the tableware dryer of the present invention can remove a predetermined amount or more of water droplets from the tableware without moving the object to be dried, so that the drying time can be shortened. Also useful as a dishwasher.

The block diagram of the tableware dryer of Embodiment 1 of this invention Top view showing the arrangement of tableware of the tableware dryer Side view of the ultrasonic radiator of the tableware dryer Aa arrow view of the ultrasonic radiation device of the tableware dryer Action diagram of the focal point moving means of the tableware dryer The top view which shows the arrangement | sequence of the tableware of the other example of the tableware dryer Action diagram of the focal point moving means of the tableware dryer Cross section of the bottom of the dryer of the tableware dryer (A) (b) Operation | movement figure of the ultrasonic focusing means of the tableware dryer of Embodiment 2 of this invention The block diagram of the tableware dryer of Embodiment 3 of this invention Action diagram of the focal point moving means of the tableware dryer Action diagram of the focal point moving means of the tableware dryer Action diagram of the focal point moving means of the tableware dryer The block diagram of the dishwasher of Embodiment 4 of this invention Action diagram of the focus moving means of the dishwasher Action diagram of the focus moving means of the dishwasher Front view of a conventional ultrasonic radiation device Side view of the ultrasonic radiation device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drying cabinet 2 Tableware basket 3 Ultrasonic vibrator 6 Radiation plate 8 Ultrasonic focusing means 10 Focus moving means 11 Heater 12 Blower fan 25 Control means 30 Ultrasonic radiation apparatus 31 Ultrasonic radiation part

Claims (6)

A tableware basket for installing an object to be dried such as tableware, a drying cabinet for storing the tableware basket, a blower fan for introducing outside air into the drying cabinet, a heater for heating the air in the drying cabinet, and an ultrasonic wave An ultrasonic radiation device that radiates vibrations into the air, and a control unit that controls the ultrasonic radiation device, wherein the ultrasonic radiation device vibrates a radiation plate to radiate ultrasonic vibrations into the air. An ultrasonic focusing means for focusing the ultrasonic vibration radiated from the radiation plate having a substantially paraboloid on a linear or dotted focal position; and the ultrasonic vibration converged by the ultrasonic focusing means A tableware dryer provided with a focus moving means for moving the focal position of the table. An ultrasonic radiation unit is provided on the side of the drying cabinet, and the ultrasonic radiation device is arranged. The focal point moving means moves the traveling direction of the ultrasonic vibration emitted from the ultrasonic radiation device downward in the drying cabinet. The tableware drier according to claim 1, wherein the tableware drier is changed toward the surface. 3. The tableware dryer according to claim 1 or 2, wherein the ultrasonic radiation device comprises an ultrasonic vibrator, a radiation plate, an ultrasonic focusing means, and a focal point moving means. The focal point moving means is composed of a multi-plane rotating body having a large number of reflecting surfaces for converging the ultrasonic wave radiated from the ultrasonic focusing section to a point-like focal position, and the control means is supersonic while rotating the multi-plane rotating body. 2. The tableware dryer according to claim 1, wherein the ultrasonic vibrator is operated. Tableware basket in which objects to be cleaned such as tableware are installed, a cleaning tank for storing the tableware basket and cleaning the objects to be cleaned, cleaning means for cleaning the objects to be cleaned in the cleaning tank, and cleaning water in the cleaning tank Water supply means for supplying water, drainage means for discharging washing water from the washing tank, a blower fan for introducing outside air into the washing tank, a heater for heating the air in the washing tank, and ultrasonic vibration in the air An ultrasonic radiation device that radiates the ultrasonic radiation device, and a control unit that controls the ultrasonic radiation device, wherein the ultrasonic radiation device vibrates a radiation plate to emit ultrasonic vibrations into the air, and An ultrasonic focusing means that has a substantially paraboloid and focuses ultrasonic vibrations emitted from the radiation plate to a linear or point-like focal position, and a focal position of the ultrasonic vibrations converged by the ultrasonic focusing means And a focus moving means for moving the control hand. , The cleaning means, the blower fan and to control the heater, washing and dish dryer according to any one of drying claims 1 to 4 step was to run. An ultrasonic radiation unit in which an ultrasonic radiation device is disposed, a communication unit that communicates the ultrasonic radiation unit and the cleaning tank, and the communication unit is a focal point moving unit configured by a rotatable rotating reflector. The tableware dryer according to any one of claims 1 to 5, wherein the tableware dryer is configured to be freely opened and closed.

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