JP2014117432A - Dishwasher - Google Patents

Abstract

A dishwasher capable of performing efficient washing by changing the shape of a jet of washing water from a washing nozzle that hits tableware.
A pressurizing unit 6 that pressurizes and circulates cleaning water W in a cleaning tank 2 that houses tableware 3 and an injection hole that sprays the pressurized cleaning water W from below the tableware 3 toward the tableware 3. 8, and a moving unit 30 that sequentially moves the position of the injection hole 8 of the cleaning nozzle 7. The moving unit 30 moves the position of the injection hole 8 toward the upper side of the cleaning nozzle 7. The rising flow of the jet 52 of the cleaning water W jetted in this way and the damping flow 53 in which the rising velocity of the jet 52 once jetted is damped, resulting in a moving speed that forms the water mass 54 by the vortex. As a result, it becomes possible to supply a sufficient amount of water to the tableware 3 on which dirt that requires a large amount of washing water W adheres by washing per rotation of the washing nozzle 7, and to wash the tableware 3 efficiently. Can do.
[Selection] Figure 1

Description

  The present invention relates to a dishwasher for washing dishes and cooking utensils in a general household.

  The structure of the conventional dishwasher 1 is demonstrated. FIG. 7 is a side sectional view showing the internal configuration of the conventional dishwasher 1, FIG. 8 is a plan view showing the rotation direction of the washing nozzle 7 of the tableware washing machine 1, and FIG. 2 is a cross-sectional view of the main part in the vicinity of a propelling injection hole 8a of a cleaning nozzle 7 of the cleaning machine 1. FIG.

  In FIG. 7, the washing tub 2 is provided with a tableware basket 4 for storing the tableware 3 therein. The cleaning tank 2 is provided with a heating unit 5 (for example, a sheathed heater) for heating the cleaning water W in the cleaning tank 2, and a pressurizing unit 6 (for example, a lower part of the cleaning tank 2). A cleaning pump) is provided. The pressurizing unit 6 pressurizes the cleaning water W and sprays the cleaning water W from the injection holes 8 of the cleaning nozzle 7 to clean the tableware 3 stored in the tableware basket 4. The water supply valve 9 supplies tap water to the cleaning tank 2. The washing water W in the washing tank 2 is drained by the drainage unit 10.

  The filter 11 is provided in the washing tank 2 and collects leftovers (food that has adhered to the tableware 3 as dirt is called leftovers) in the washing step and the rinsing step. The blower 12 operates in a drying process to blow outside air into the cleaning tank 2 and exhausts it from the exhaust port 13 to dry the tableware 3 in the cleaning tank 2. A door 14 is provided on the front surface of the cleaning tank 2 so as to be freely opened and closed.

  The temperature detection unit 15 detects the temperature of the cleaning water W, air, and the heating unit 5 in the cleaning tank 2 via the cleaning tank 2, and inputs the output to the control device 16. The control device 16 controls the heating unit 5 based on the output of the temperature detection unit 15 and also controls the pressurizing unit 6, the water supply valve 9, the drainage unit 10, and the air blowing unit 12 to perform a series of washing, rinsing, and drying. These steps are sequentially controlled.

  About the dishwasher 1 of the said structure, the operation | movement and an effect | action are demonstrated. When the user opens the door 14 forward, places the tableware 3 in the tableware basket 4, puts the detergent in the washing tub 2 and puts the detergent into it, when the operation starts, the drainage unit 10 operates first, and the previous operation For example, the cleaning water W (referred to as residual water) remaining in the cleaning tank 2 is discharged outside the apparatus.

  Then, the water supply valve 9 operates to supply the cleaning water W to the cleaning tank 2. When a predetermined amount of cleaning water W is supplied, the water supply valve 9 is closed, the pressurizing unit 6 pressurizes the cleaning water W, and the cleaning water W is injected from the injection holes 8 provided in the cleaning nozzle 7 together with the detergent. . Thus, the cleaning process is performed. In this cleaning process, the control device 16 energizes the heating unit 5 provided in the cleaning tank 2 to heat the cleaning water W to a predetermined temperature required in the cleaning process.

  When the cleaning process for a predetermined time is executed, the control device 16 discharges the cleaning water W containing the dirt washed out from the tableware 3 to the outside by the drainage unit 10. Subsequently, the control device 16 supplies new cleaning water W into the cleaning tank 2 and sprays it again from the injection holes 8 provided in the cleaning nozzle 7 to rinse the tableware 3 soiled with detergent, leftovers, etc. Execute the process.

When the controller 16 finishes this rinsing process, the controller 16 again discharges the washing water W to the outside of the machine. This rinsing process is repeated several times in succession. In the cleaning process and the rinsing process, leftovers are collected in a filter 11 provided in the cleaning tank 2. When the predetermined number of rinsing steps are completed, the drying step is started. In this drying process, the air blower 12 operates and air outside the apparatus is sent into the cleaning tank 2. The air sent in is heated by the heating unit 5, and then the tableware 3 is dried and discharged from the exhaust port 13 to the outside of the apparatus. The control device 16 ends the operation after the drying step.

  As shown in FIG. 8, the cleaning nozzle 7 includes a propelling injection hole 8 a that injects the cleaning water W in the direction opposite to the rotation direction of the cleaning nozzle 7. The cleaning nozzle 7 is a product of an injection reaction force F generated when the cleaning water W is injected from the propulsion injection hole 8a and a rotation radius r that is a distance between the center of the nozzle shaft portion 17 and the center of the propulsion injection hole 8a. That is, the rotation speed T (= F × r) of the cleaning nozzle 7 is rotated at a predetermined rotation speed N (30 to 60 r / min). The number of rotations of the cleaning nozzle 7 is set so that it does not stop even if a small foreign matter such as leftovers enters between the nozzle shaft portion 17 which is the rotation center of the cleaning nozzle 7 and the bearing portion. 7 is set to a rotational speed that takes into account that the vicinity of the nozzle shaft portion 17 is not worn down due to the rotational speed being too high (see, for example, Patent Document 1).

  Further, as shown in FIG. 8, in the propulsion injection hole 8a, the injection angle for injecting the cleaning water W is inclined with respect to the vertical direction (this inclination angle is shown as an angle α in FIG. 9). Therefore, it is also designed to wash deep dishes 3a such as tea bowls and soup bowls. The injection hole 8 for injecting the cleaning water W in the vertical direction also acts as the propulsion injection hole 8 a when the injection angle is slightly inclined in the direction opposite to the rotation direction of the cleaning nozzle 7.

Japanese Patent Laid-Open No. 07-031575

  However, the conventional dishwasher 1 as shown in FIG. 7 has the following problems.

  When tableware 3 having a large area to be cleaned, such as a large plate or a flat plate, is arranged in parallel, it is difficult for washing water to enter the gap between the tableware 3 and the tableware 3, and the amount of washing water entering the gap is also small. It was necessary to supply cleaning water many times. This is because the wash water entering from the gap between the tableware 3 and the tableware 3 hits one side of the tableware 3 and spreads thinly and falls in the form of a widened film. And oil stains could not be removed by just supplying the surface several times and remained.

  In addition, with a small amount of washing water, there was a case where the leftovers that were peeled off when the washing water spread on the surface of the tableware 3 moved and did not adhere again.

  Furthermore, the wash water that has entered the gap between the tableware 3 and the tableware 3 spreads only on the surface of one tableware 3 because the tableware 3 has a curved shape. Therefore, the wash water did not reach the facing tableware 3 and could not be cleaned sufficiently.

  The present invention solves the above-described conventional problems, and provides a dishwasher capable of performing efficient washing by changing the shape of a jet of washing water from a washing nozzle that hits tableware.

In order to solve the above-described conventional problems, a dishwasher according to the present invention includes a washing tank for storing an object to be cleaned such as tableware, a pressurizing unit for pressurizing and circulating cleaning water in the cleaning tank, and a pressurizing unit A cleaning nozzle having an injection hole for injecting the cleaning water pressurized by the liquid from below the object to be cleaned toward the object to be cleaned, and a moving unit for sequentially moving the position of the injection hole of the cleaning nozzle, The moving speed of the position of the injection hole of the cleaning nozzle is an upward flow of a jet of cleaning water that is injected upward of the cleaning nozzle;
It is configured so that the rising speed of the jet once jetted collides with a damped flow that attenuates to form a moving speed that forms a water mass due to the vortex.

  As a result, not only the upward flow but also the eddy current acts on the leftovers attached to the object to be cleaned, so that the cleaning water hits the leftovers in a complex manner from multiple directions, and the peeling action is increased, so that the cleaning effect is increased. Moreover, since a large amount of washing water flows on the surface of the object to be cleaned due to the formation of water mass, the peeled leftovers are not reattached. Furthermore, when washing water is sprayed between parallel dishes, a water mass is formed between the dishes, and the swirl of the water mass also contacts the tableware on the opposite side of the tableware to which the washing water hits. can do.

  The dishwasher according to the present invention has the structure described in claim 1 of the claims, so that the rising flow of the jet injected from the cleaning nozzle and the damping flow in which the rising velocity of the jet once injected is attenuated. Spills to form a water mass due to vortex flow, so that a sufficient amount of water can be brought into contact with deep dishes and platters such as teacups and soup bowls that are contaminated with a lot of washing water. It becomes. Therefore, the predetermined cleaning performance can be obtained in a short time, and the dishes can be efficiently cleaned.

Side sectional view of the dishwasher in Embodiment 1 of the present invention Plan view seen from above the moving part of the dishwasher Sectional drawing in the AA line of FIG. 2 of the moving part of the same dishwasher Explanatory drawing explaining the inflow condition of the jet from the washing nozzle of the dishwasher Side sectional view of the dishwasher in Embodiment 2 of the present invention Side sectional view of the dishwasher in Embodiment 3 of the present invention Side sectional view of a conventional dishwasher The top view which shows the rotation direction of the washing nozzle of the tableware washing machine Cross-sectional view of the main part near the propulsion injection hole of the washing nozzle of the dishwasher

  The first invention is a cleaning tank for storing objects to be cleaned such as tableware, a pressurizing part for pressurizing and circulating the cleaning water in the cleaning tank, and the cleaning water pressurized by the pressurizing part. A cleaning nozzle having an injection hole for injecting toward the object to be cleaned from below the cleaning object; and a moving unit for sequentially moving the position of the injection hole of the cleaning nozzle, wherein the moving unit is an injection hole of the cleaning nozzle The moving speed of the position of the water collides with the rising flow of the jet of cleaning water injected toward the upper side of the cleaning nozzle and the damped flow in which the rising speed of the jet once jetted attenuates to cause a water mass due to the vortex It is comprised so that it may become the moving speed which forms.

  The washing water sprayed from the washing nozzle gradually rises and rises, and when it comes into contact with the object to be cleaned, the brake is braked by friction and the rising speed is rapidly attenuated. Attenuates and falls on the surface of the object to be cleaned. Then, the damped damping flow and the rising flow of cleaning water jetted later collide in the vicinity of the surface of the object to be cleaned, resulting in a water mass in which vortex flow is generated by collision of flows with different flow velocities and flow directions. grow up. In order to form this water mass, it takes time for the damping flow and the upward flow to collide with the object to be cleaned. Therefore, it is necessary to sufficiently slow the moving speed of the position of the jet hole.

The dishwasher according to the present invention has the above-described configuration, so that not only the upward flow but also the vortex generated by the collision of the jet acts on the leftovers and dirt adhering to the object to be cleaned. Washing water hits the leftovers in a complex manner from multiple directions, and the removal effect of the leftovers increases, so the cleaning effect increases. Further, since a water mass is formed on the surface of the object to be cleaned, a large amount of cleaning water flows on the surface of the object to be cleaned at that portion, so that the peeled leftovers are swept away by the swirl and do not adhere again. Furthermore, when washing water is sprayed between the dishes in parallel, a water mass is formed between the dishes, and the swirl of the water mass comes into contact with the dishes on the opposite side of the table on which the washing water hits. Since it is washed, there is less leftover.

  In the second aspect of the invention, in particular, the moving unit of the first aspect of the invention is configured such that the moving speed of the position of the injection hole of the cleaning nozzle is 1 / the speed of the injection of the cleaning water injected from the injection hole of the cleaning nozzle. It is configured to be 400 to 1/20. If the moving speed is 1/400 or less, the moving speed becomes too slow, and it takes time to clean the object to be cleaned in the entire cleaning tank. On the other hand, if it is 1/20 or more, the moving speed is too fast, and it becomes difficult to form a water mass in which a vortex of the washing water is generated. That is, by setting the moving speed of the position of the injection hole to 1/400 to 1/20, a water mass in which a vortex is generated can be formed, and cleaning can be performed efficiently in a short time.

  According to a third aspect of the invention, in particular, the cleaning nozzle of the first or second aspect of the invention is configured to rotate by the jetting force of the wash water to be jetted, and the moving unit has a preset number of revolutions of the washing nozzle. It is comprised by the suppression part which suppresses rotation so that it may become. The suppression unit is composed of, for example, a rotary damper, a water wheel, a clutch, and the like. By this, the number of rotations of the cleaning nozzle can be reliably set to a condition in which a water mass due to eddy currents is easily formed, so stable and high cleaning by eddy currents is possible. Performance can be obtained. In addition, the number of rotations of the washing nozzle that generates water mass due to vortex flow is lower than the number of rotations of the washing nozzle in the conventional dishwasher, and it is usually said that the washing water from the washing nozzle does not easily enter and dirt is difficult to remove. Even for deep dishes and platters such as tea bowls and soup bowls, rotating the washing nozzle at a low speed ensures time for the washing water to spread over the entire surface of the tableware. Can be supplied to tableware. Therefore, it is possible to obtain a predetermined cleaning performance without generating unnecessary energy for supplying more cleaning water than necessary, and it is possible to efficiently clean the dishes.

  According to a fourth aspect of the invention, in particular, the moving unit of the first or second aspect of the invention is configured by a driving device that controls the cleaning nozzle to rotate at a preset number of rotations. The drive device is composed of, for example, an electric motor or a turbine motor that uses cleaning water circulated by a pressurizing unit, and the influence of disturbances such as a change in the amount of water in the pressurizing unit and a frictional change in the sliding unit due to foreign matter intrusion. Since the fluctuation of the rotation speed of the cleaning nozzle due to the can be reduced, it is possible to accurately set the condition that the water mass due to the vortex is easily formed. Therefore, stable high cleaning performance can be obtained by forming water masses by vortex flow.

  In the fifth aspect of the invention, in particular, the moving part of the first or second aspect of the invention is configured by adjusting the direction of the injection hole of the cleaning nozzle so as to rotate at a preset rotational speed. Thereby, it can comprise at low cost compared with the moving part comprised mechanically.

  In the sixth aspect of the invention, in particular, the cleaning nozzle of the first aspect of the invention is configured to inject the cleaning water supplied from the arm nozzle, the arm nozzle rotating while injecting the cleaning water pressurized by the pressurizing unit. And the arm nozzle supports the child nozzle so that the center of rotation is eccentric with respect to the center of rotation of the arm nozzle, and the moving unit rotates the child nozzle. The arm nozzle and the oscillating water so as to collide with the cleaning water previously ejected from the child nozzle to collide with the cleaning water ejected later to form a water mass due to eddy current. The rotation speed of the child nozzle is set. As a result, since the trajectory of the cleaning water sprayed from the sub nozzles is drawn uniformly in the cleaning tank, the cleaning unevenness is reduced, and the cleaning efficiency can be further improved together with the formation of water masses by the vortex.

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

(Embodiment 1)
First, the structure of the dishwasher 101 in Embodiment 1 of this invention is demonstrated. 1 is a side sectional view showing an internal configuration of the dishwasher 101 according to Embodiment 1 of the present invention, FIG. 2 is a plan view showing a moving unit 30 of the dishwasher 101, and FIG. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2 of the moving unit 30 of the dishwasher 101. In FIG. 1, the same parts as those in the conventional example are given the same reference numerals, and the description thereof is omitted.

  In the dishwasher 101 shown in FIG. 1, a moving unit 30 that is a suppressing unit that suppresses the rotation of the cleaning nozzle 7 and moves the injection hole 8 at an appropriate speed below the cleaning nozzle 7, and the cleaning tank 2. A water turbine 31 is provided for stirring the cleaning water W accumulated at the bottom while rotating. The moving part 30 includes a speed increasing part 32 that speeds up and transmits the rotation of the cleaning nozzle 7 to the water wheel 31.

  The rotation transmission from the cleaning nozzle 7 to the moving unit 30 is performed by meshing a gear A33 disposed on the upper portion of the nozzle shaft portion 17 of the cleaning nozzle 7 with a gear B34 provided on the upper portion of the moving unit 30. . The gear A33 and the gear B34 are preferably module gears as large as possible. And by arranging the distance between both gears wider than the standard, making the tooth width thinner than the standard, and widening the play of the gear, the foreign matter is caught between the gears without hindering the rotation of the cleaning nozzle 7. Prevents lock by.

  The moving unit 30 will be described with reference to FIGS. 2 and 3. In the figure, the speed increasing portion 32 is disposed in an internal space formed by fitting a case upper 35 and a case lower 36, and is configured by meshing a gear C37, a gear D38, a gear E39, and a gear F40. The gear C37 rotates integrally coaxially with the gear B34 and transmits the rotation of the cleaning nozzle 7 to the gear D38. The gear D38 is a connecting gear and transmits the rotation of the gear C37 to the small gear 41 of the gear E39. The gear E39 includes a small gear 41 and a large gear 42 that are coaxially integrated, and the large gear 42 and the gear F40 are meshed and transmitted. The gear F40 rotates integrally with the water wheel 31 coaxially.

  The speed increasing ratio of the speed increasing portion 32 is determined by the product of the gear ratio between the gear A33 and the gear B34, the gear ratio between the gear C37 and the small gear 41, and the gear ratio between the large gear 42 and the gear F40. . The relationship between the speed increasing magnification and the transmission torque is inversely proportional. For example, when the speed increasing magnification is set to 20 times, the suppression force required for the water turbine 31 is 1/20 of the rotational torque of the cleaning nozzle 7. If the rotational torque of the cleaning nozzle 7 is 16 mNm, a sufficient rotational restraining force can be obtained if the rotational torque of the water turbine 31 is 0.8 mNm. The rotation of the nozzle 7 can be suppressed, and the water wheel 31 can be downsized.

  The resistance of the cleaning water W against the rotation of the water turbine 31 is generally proportional to the square of the rotational speed. Therefore, if the water turbine 31 rotates at a speed 20 times the rotational speed of the cleaning nozzle 7 as compared with the case where the water turbine 31 has the same rotational speed as the cleaning nozzle 7, a drag of 400 times can be obtained. Even if it is 31, sufficient braking force can be obtained.

  In addition, when foreign matter enters between the nozzle shaft portion 17 and the bearing portion, the load on the cleaning nozzle 7 increases and the rotational speed decreases, so that the water turbine 31 of the moving unit 30 is proportional to the rotational speed. Since the rotational speed also decreases, the rotation suppression force to the cleaning nozzle 7 decreases in proportion to the square of the rotational speed reduction. As described above, when a decrease in the rotational speed due to such disturbance as foreign matter intrusion occurs, the suppression force by the moving unit 30 decreases in proportion to the square of the decrease in the rotational speed, and thus the cleaning nozzle 7 is stable without stopping. And can continue to rotate.

Further, when the rotational torque accompanying the increase in the reaction force from the cleaning nozzle 7 is increased due to the increase in the circulation flow rate of the cleaning water W due to the voltage fluctuation and the characteristic variation of the pressurizing unit 6, the suppression force by the moving unit 30 is the rotational speed. Since it increases in proportion to the square of the increase, an increase in the number of rotations of the cleaning nozzle 7 is suppressed, and stable cleaning performance can be exhibited.

  In addition, according to the washing | cleaning evaluation test of the food affixed on the tableware 3 which the inventors performed, compared with the case where the rotation speed of the washing nozzle 7 is 30r / min conventionally, it is 0.3r / min-20r / min. In the case where the rotational speed was lowered, it was confirmed that the cleaning effect was improved. In particular, the effect was remarkable when the rotational speed was in the range of 1 r / min to 15 r / min.

  Next, the cleaning effect of the water mass by the vortex of the cleaning water will be described with reference to FIG. 4 (a) to 4 (e) show the flow state of the jet 52 from the cleaning nozzle 7 between the two platters A50 and B51 arranged in parallel. FIG. FIG. 4E shows a state in which the jet flow 52 starts to flow between the platter A50 and the platter B51, and FIG. 4E illustrates a state at the end of the flow of the jet flow 52 between the platter A50 and the platter B51. ) To FIG. 4D sequentially show the states in between. The cleaning nozzle 7 is assumed to move in the direction indicated by the arrow in the figure.

  The behavior of the washing water jet 52 during washing will be analyzed in detail below. By reducing the rotational speed of the cleaning nozzle 7, the time of hitting one tableware 3 of the jet 52 of the cleaning water W injected from the injection hole 8 of the cleaning nozzle 7 becomes longer, as shown in FIG. The jet flow 52 ejected from the washing nozzle 7 hits the platter B51 from an obliquely lower side and spreads thinly. And the jet 52 receives frictional resistance on the surface of the platter B51, and rises while reducing the speed.

  In the state of FIG. 4B, the jet flow 52 that has risen later collides with the jet flow and damping flow 53 that have first risen to the upper end portion of the platter B <b> 51 and reduced the speed, and a water mass 54 is formed. In the state of FIG. 4C, the jets 52 collide with the water mass 54 one after another, a vortex is generated in the water mass 54, and the water mass 54 further grows. And in the state of FIG.4 (d), the water mass 54 reaches the back surface of the platter A50, spreads between the platter A50 and the platter B51, and can wash | clean the whole including the back surface of the platter A50 as a result. become.

  When the cleaning nozzle 7 further moves away and the intrusion of the jet flow 52 between the platter A50 and the platter B51 is finished as shown in FIG. 4E, the greatly grown water mass 54 eliminates the winding action by the jet flow 52. Fall. At this time, leftovers and dirt that have fallen off the platter A50 and the platter B51 fall together with a large amount of washing water, so that the occurrence of reattachment of dirt to the platter A50 and the platter B51 can be suppressed.

  Factors related to the conditions under which the water mass 54 is formed include the moving speed of the cleaning nozzle 7, the ejection angle / flow rate / flow speed of the cleaning water, the height and shape of the tableware 3 to be cleaned, and the like. When the optimum condition is obtained from the relationship between the water injection speed and the movement speed of the cleaning nozzle 7, the position of the injection hole 8 of the cleaning nozzle 7 is determined relative to the injection speed of the cleaning water injected from the injection hole 8 of the cleaning nozzle 7. It was confirmed by a cleaning evaluation test conducted by the inventors that the moving speed is appropriate from 1/400 to 1/20.

  For example, when the injection speed of the cleaning water is 5 m / s, the state in which the injection hole 8 located at a radius of 150 mm from the center of the nozzle shaft portion 17 rotates at 0.8 r / min is about 1/400. Even if the moving speed of the injection hole 8 is slower, the water mass 54 accompanied by the vortex flow is formed. However, even if it is made slower than this, the improvement of the cleaning effect per one time is small, so it takes time to slow down. become. In addition, when the washing water injection speed is 5 m / s, the state in which the injection hole 8 located at a radius of 150 mm from the center of the nozzle shaft portion 17 rotates at 15 r / min has a ratio of about 1/20. Then, the water mass 54 accompanied by the vortex is not formed.

The water mass 54 accompanied by the vortex described above is generated when the cleaning nozzle 7 moves slowly and the jet 52 continues to hit the same tableware 3. In a conventional dishwasher, the movement speed of the washing nozzle is fast, and the washing nozzle passes before the water mass is generated, so in order to obtain sufficient washing performance, the washing nozzle is passed many times to save time. The washing performance was compensated by applying.

  Next, the operation and action of the dishwasher 101 having the above configuration will be described with reference to FIG. When the user opens the door 14, places the tableware 3 in the tableware basket 4, puts the detergent in the washing tub 2, puts the detergent, closes the door 14 and starts operation, the drainage unit 10 operates, The washing water W (referred to as residual water) remaining in the washing tub 2 is discharged out of the dishwasher 101 by the above operation.

  Next, the water supply valve 9 operates to supply a predetermined amount of cleaning water W to the cleaning tank 2. When a predetermined amount of cleaning water W is supplied, the water supply valve 9 is closed, the cleaning water W is pressurized by the pressurizing unit 6, and the cleaning water W is sprayed from the injection holes 8 provided in the cleaning nozzle 7 together with the detergent. The Thus, the cleaning process is performed. In this cleaning process, the control device 16 energizes the heating unit 5 provided in the cleaning tank 2 to heat the cleaning water W to a predetermined temperature required for cleaning.

  At the same time, the cleaning nozzle 7 is rotated by the injection reaction force from the injection hole 8, and the gear A33 is rotated along with this rotation, and the rotation of the cleaning nozzle 7 is transmitted to the speed increasing portion 32 via the gear B34 engaged with the gear A33. The water turbine 31 is rotated at an increased speed. The water turbine 31 stirs the cleaning water W by rotation and receives a drag from the cleaning water W in a direction to suppress the rotation, and the drag prevents the cleaning nozzle 7 from rotating and is decelerated by the moving unit 30 to rotate at a low speed. To do. Then, the cleaning water W sprayed from the spray hole 8 of the cleaning nozzle 7 is swirled in the gap between the dishes 3 when the cleaning nozzle 7 is slowly rotated and supplied to the dishes 3 arranged in the tableware basket 4. A water mass 54 is formed and spreads throughout, and the tableware 3 is washed evenly.

  When the washing process is performed for a predetermined time, the drainage unit 10 discharges the washing water W including the dirt washed away from the tableware 3 to the outside of the apparatus. Then, the water supply valve 9 newly supplies the cleaning water W, and the cleaning water W is again sprayed from the injection holes 8 provided in the cleaning nozzle 7, thereby rinsing the tableware 3 soiled with detergent, leftovers, etc. Run. Also at this time, since the cleaning nozzle 7 is decelerated by the moving unit 30 and rotates at a low speed, the cleaning water W sprayed from the spray hole 8 of the cleaning nozzle 7 is the tableware 3 and the tableware 3 disposed in the tableware basket 4. A water mass 54 is formed in the gap and is supplied to every corner of all the dishes 3 to efficiently rinse the dishes 3.

  When this rinsing process is completed, the control device 16 operates the drainage unit 10 to discharge the cleaning water W to the outside of the apparatus again. This rinsing process is repeated a plurality of times in succession. In the washing and rinsing process, the leftovers are collected in a filter 11 provided in the washing tank 2. When the predetermined number of rinsing steps are completed, the drying step is started. In this drying process, the air blower 12 operates and air outside the dishwasher 101 is sent into the washing tub 2. The air sent in is heated by the heating unit 5, and then the tableware 3 is dried and discharged from the exhaust port 13 to the outside of the apparatus. The control device 16 ends the operation after the drying step.

  Of the rinsing steps performed a plurality of times, at least one rinsing step may be a step of rinsing and heating the tableware 3 while heating the washing water W by the heating unit 5.

According to the tableware washing machine 101 of this Embodiment comprised in this way, since the stain | pollution | contamination, such as a rice grain, has adhered in the tableware 3 arrange | positioned at the tableware basket 4, much washing water W is not supplied. In addition, a deep dish 3a such as a tea bowl or a soup bowl where predetermined cleaning performance cannot be obtained, or a large dish that has a large area to be cleaned and in which the cleaning water W is difficult to spread throughout, is sprayed by the cleaning nozzle 7 rotating slowly. The washing water W sprayed from the holes 8 slowly passes through the gap between the tableware 3 and the tableware 3 to generate a water mass 54 with a vortex, and as a result, the washing water W is on the front and back corners of the tableware 3. Can be cleaned efficiently.

  Therefore, the dishwasher 101 of the present embodiment can spread the washing water W over the entire surface of the tableware 3 every time the washing water W ejected from the ejection holes 8 passes, so that the predetermined washing performance can be achieved in a short time. Can be obtained, and the tableware 3 can be efficiently washed.

(Embodiment 2)
Next, the configuration of the dishwasher 102 according to Embodiment 2 of the present invention will be described in detail with reference to the drawings. FIG. 5 is a side sectional view of the dishwasher 102 according to the second embodiment. In addition, the same part as Embodiment 1 mentioned above attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIG. 5, the dishwasher 102 in the present embodiment is different from the first embodiment in that the moving unit that suppresses the movement due to the rotation of the washing nozzle 7 is rotated via the gear A33 and the gear B60. The driving device 61 can arbitrarily set the number of rotations of the cleaning nozzle 7 by a built-in electric motor (not shown).

  Therefore, since the dishwasher 102 in this Embodiment can change the rotation speed of the washing nozzle 7 according to the stain | pollution | contamination condition of the tableware 3, when the user selects the mode wash | cleaned firmly, for example Further, by making the rotation speed of the washing nozzle 7 slower and slowing the speed at which the injection hole 8 of the washing nozzle 7 moves, a sufficient volume of water mass 54 is formed between the dishes 3, and the washing power is increased. Can be improved.

  Moreover, when the dishwasher 102 in this Embodiment wash | cleans the table 3 which is not very dirty, the water mass 54 between the tables 3 will become small by raising the rotation speed of the washing nozzle 7, but in a short time. You can finish washing. Therefore, the dishwasher 102 in the present embodiment can be used properly according to the user's wishes.

(Embodiment 3)
Next, the structure of the tableware washing machine 103 which concerns on Embodiment 3 of this invention is demonstrated in detail using drawing. FIG. 6 is a side sectional view of the dishwasher 103 in the third embodiment. In addition, the same part as Embodiment 1 mentioned above attaches | subjects the same code | symbol, and abbreviate | omits description.

  As shown in FIG. 6, the dishwasher 103 in the present embodiment is different from the first embodiment in that the cleaning nozzle 70 is composed of a combination of an arm nozzle 71 and a child nozzle 72 and is pressurized by the pressurizing unit 6. The cleaning water thus sprayed is ejected from the ejection hole 73, the arm nozzle 71 rotating by this ejection force, and the cleaning water supplied from this arm nozzle 71 is ejected from the ejection hole 74, and the child nozzle 72 rotating by this ejection force. The arm nozzle 71 rotatably supports the child nozzle 72 by decentering the center of the child nozzle shaft portion 75 that is the rotation center of the child nozzle 72 from the center of the nozzle shaft portion 17 that is the rotation center of the arm nozzle 71. The moving unit 30 is configured to suppress the rotation of the arm nozzle 71.

  The sub nozzle 72 has a length that is approximately half of the length in the short direction of the left-right direction or the front-rear direction when the cleaning tank 2 is viewed from above, and is an arm nozzle that is rotatable about the sub nozzle shaft portion 75. 71 is supported. Further, the child nozzle 72 is connected to the pressurizing unit 6 through the arm nozzle 71. Therefore, the child nozzle 72 is freely rotated by the injection reaction force caused by the injection of the cleaning water from the injection hole 74.

The arm nozzle 71 is disposed in the cleaning tank 2 so as to be rotatable about the nozzle shaft portion 17. As in the first embodiment, the gear A33 disposed at the upper portion of the nozzle shaft portion 17 and the gear B34 provided at the upper portion of the moving portion 30 are engaged with each other to suppress the rotation of the arm nozzle 71. Therefore, the arm nozzle 71 rotates at a rotational speed at which the force that is rotated by the jet reaction force caused by the washing water jet from the jet hole 73 and the rotation suppression force by the moving unit 30 are balanced. That is, the arm nozzle 71 rotates at a slower speed than the case where the arm nozzle 71 does not include the moving unit 30 and rotates only by the injection reaction force. The arm nozzle 71 rotates at a slower speed than the child nozzle 72 that rotates freely only by the injection reaction force from the injection hole 74.

  As described above, the arm nozzle 71 arranged in the cleaning tank 2 is slowly rotated by the moving unit 30, so that the child nozzle 72 attached to one end of the arm nozzle 71 slowly revolves while rotating in the cleaning tank 2. Will do. As a result, as already described with reference to FIGS. 4A to 4E, the washing water sprayed from the child nozzle 72 rises while being damped against the tableware 3, but rotates here. Since the next washing water is jetted from the sub nozzle 72 to the tableware 3, the washing water jetted later collides with the washing water jetted earlier, and a water mass is formed by a vortex. This action is repeated one after another, and a large water mass can be obtained to enhance the cleaning effect.

  Therefore, the dishwasher 103 according to the present embodiment is also provided with the arm nozzle for the dishwasher 103 in this embodiment, even for deep dishes and platters such as tea bowls and soup bowls, for which a predetermined washing performance cannot be obtained unless a large amount of washing water is supplied. By slowing down the rotation speed of 71, a large amount of washing water can be supplied to deep dishes and platters such as tea bowls and soup bowls. Therefore, coupled with the fact that cleaning water can be sprayed over a wide range by the sub nozzle 72, efficient cleaning becomes possible.

  In the dishwasher 103 according to the present embodiment, the child nozzle 72 revolves slowly while rotating in the washing tub 2, so that the rotation of the arm nozzle 71 makes one turn in the ejection trajectory of the washing water in the injection hole 74. As a result, the entire inside of the cleaning tank 2 is spread, and cleaning can be performed without unevenness.

  In the dishwasher 103 according to the third embodiment, the mechanical moving unit 30 is used to slowly rotate the arm nozzle 71. However, by reducing the rotational moment due to the washing water jet from the jet hole 73. In order to eliminate the instability of rotation due to disturbance, the rotation of the sub nozzle 72 due to the injection of cleaning water is used to reduce the rotational instability due to disturbance. Moments may be added. This is because the injection hole 74 for injecting the cleaning water not only generates rotation of the child nozzle 72 itself by the injection reaction force, but also changes in the distance from the nozzle shaft portion 17 of the injection hole 74 as the child nozzle 72 rotates. This is because the arm nozzle 71 is rotated in a pulsating manner. This pulsation can eliminate the instability of the low speed rotation of the arm nozzle 71.

  In the third embodiment, the cleaning nozzle is obtained by adding the child nozzle 72 to the arm nozzle 71 to perform efficient cleaning and eliminate the unstableness of the low speed rotation of the arm nozzle 71. It does not require a nozzle. For example, in FIG. 5 described in the second embodiment, the driving device 61 may be adjusted by the injection hole 8 of the cleaning nozzle 7. Thereby, it can comprise at low cost compared with the moving part comprised mechanically.

  As described above, the dishwasher according to the present invention has the effect that the rising flow of the washing water jetted from the washing nozzle collides with the damped flow in which the rising velocity of the jetted jet is damped, and the water generated by the vortex flow. Since a lump is formed, it is possible to supply a sufficient amount of washing water per wash nozzle rotation to deep dishes and platters such as teacups and soup bowls that are contaminated with a lot of washing water. It becomes. Therefore, the predetermined washing performance can be obtained in a short time, and the dishes can be efficiently washed, so that it can be applied not only to household dishwashers but also to commercial dishwashers.

2 Washing tank 3 Tableware 6 Pressure part 7 Washing nozzle 8 Injection hole 30 Moving part (suppression part)
52 Jet 53 Damping Flow 54 Water Block 61 Drive 70 Cleaning Nozzle 71 Arm Nozzle 72 Sub Nozzle 73, 74 Injection Hole 101, 102, 103 Dishwasher

Claims (6)

A cleaning tank for storing objects to be cleaned such as tableware, a pressurizing unit for pressurizing and circulating cleaning water in the cleaning tank, and cleaning water pressurized by the pressurizing unit from below the objects to be cleaned. A cleaning nozzle having an injection hole that injects toward the cleaning object; and a moving unit that sequentially moves the position of the injection hole of the cleaning nozzle, and the moving unit has a moving speed of the position of the injection hole of the cleaning nozzle. A moving speed at which a rising flow of a jet of cleaning water jetted upward above the cleaning nozzle collides with a damped flow that attenuates the rising speed of the jet once jetted to form a water mass due to a vortex flow; A dishwasher configured to be. The moving unit is configured such that the moving speed of the position of the injection hole of the cleaning nozzle is 1/400 to 1/20 with respect to the injection speed of the cleaning water injected from the injection hole of the cleaning nozzle. Item 1. A dishwasher according to item 1. The cleaning nozzle is configured to rotate by an injection force of the cleaning water to be sprayed, and the moving unit is configured by a suppression unit that suppresses rotation so that the number of rotations of the cleaning nozzle becomes a preset number of rotations. The dishwasher according to 1 or 2. The dishwasher according to claim 1 or 2, wherein the moving unit is configured by a driving device that controls the cleaning nozzle to rotate at a preset rotation speed. The dishwasher according to claim 1 or 2, wherein the moving unit is configured by adjusting a direction of an injection hole of the washing nozzle so as to rotate at a preset number of rotations. The cleaning nozzle includes an arm nozzle that rotates while spraying the cleaning water pressurized by the pressurizing unit, and a child nozzle that rotates while spraying the cleaning water supplied from the arm nozzle. Supports the child nozzle so that its center of rotation is eccentric with respect to the center of rotation of the arm nozzle, and the moving part slows down the rotation of the arm nozzle with respect to the rotation speed of the child nozzle. 2. The rotational speeds of the arm nozzle and the child nozzle are set so that the wash water jetted from the child nozzle first collides with the wash water jetted from the child nozzle first to form a water mass due to a vortex flow. Dishwasher.