JP4532513B2 - Washing nozzle and dishwasher equipped with the same - Google Patents

Description

  The present invention relates to a cleaning nozzle that jets cleaning water pressurized by a cleaning pump in order to perform cleaning of dishes disposed in a cleaning tank, and a dishwasher equipped with the same, and in particular, the efficiency of cleaning dishes and The present invention relates to a washing nozzle adapted to save washing water and a dishwasher equipped with the washing nozzle.

  Conventionally, there is a cleaning nozzle having a shape in which two arms are arranged to be pointed with respect to the rotation axis center. Such a cleaning nozzle forms approximately the same number of injection ports in each of the two arms. As such, “comprising a washing tank, a tableware for storing dishes, a washing pump for pressurizing washing water, and a washing nozzle having a plurality of injection holes for jetting washing water, There has been proposed a dishwasher that is curved or bent in a direction that is delayed with respect to the rotational direction during operation (see, for example, Patent Document 1).

  There is also a cleaning nozzle having a shape in which three arms are arranged every 120 ° with respect to the center of the rotation axis. As such, “comprising one or a plurality of nozzle bodies that are hollow and extend radially outward from the outer periphery of the boss part, and that are connected to the water supply pipe line at the boss part and are placed in the cleaning chamber A flush nozzle for flushing the wash water supplied through the water supply line through a plurality of nozzle holes provided on one side of the nozzle body, the nozzle body being longitudinally directed to one side There is proposed a water washing nozzle for a dishwasher (for example, refer to Patent Document 2).

JP 7-227373 A (page 1-6, FIG. 2) JP 2003-153843 A (page 1-11, FIG. 3)

  One having two arms like the washing nozzle provided in the dishwasher described in Patent Document 1, and three arms like the water washing nozzle in the tableware washing machine described in Patent Document 2. In order to adjust the balance at the time of rotation of the cleaning nozzle, all of the arms are symmetrical with respect to the center point of the rotation axis of the cleaning nozzle or have an arm arranged at an equal angle around the axis. Yes. Further, the injection ports for injecting the cleaning water are arranged and formed so as to be substantially equal to the respective arms.

  Such a cleaning nozzle is proportional to the number of injection ports formed in the cleaning nozzle and the size of the diameter of the injection ports (the sum of the opening areas). The water pressure (or wash water flow rate) is to be determined. That is, in order to save cleaning water, the number of injection ports formed in the cleaning nozzle must be reduced, or the diameter of each injection port must be reduced to reduce the total opening area of the injection ports. However, if the number of spray nozzles is reduced, it becomes impossible to uniformly apply the washing water to the dishes, and there are cases where unwashed dishes and unevenly washed dishes exist.

  In addition, if the diameter of the injection port formed in the cleaning nozzle is reduced, the particle size of the cleaning water injected from this injection port is also reduced. When the particle size of the washing water is reduced, large heavy stains that cannot be washed out with only washing water having a small particle size may remain in the dishes. That is, if the cleaning efficiency of the dishes is maintained, the cleaning water cannot be saved, and if the cleaning water is saved, the cleaning efficiency of the dishes decreases.

  The present invention has been made to solve the above-described problems, and a cleaning nozzle capable of saving cleaning water used for cleaning dishes while maintaining the cleaning efficiency of the dishes, and the same The dishwasher provided with this is provided.

  The cleaning nozzle according to the present invention is a cleaning nozzle that is attached to a rotating shaft and that sprays cleaning water while rotating around the rotating shaft, and the cleaning nozzle protrudes horizontally around the rotating shaft. The arm includes a plurality of arms, and is provided with a balance adjusting means for balancing with a reaction force generated by spraying the cleaning water on any of the arms, and the balance adjusting means among the arms A plurality of injection ports for injecting the cleaning water are formed in an arm not provided with a nozzle, and are rotatable by a reaction force of the cleaning water injected from the injection port. Moreover, the dishwasher which concerns on this invention was equipped with said washing | cleaning nozzle.

  In the cleaning nozzle according to the present invention, any one of the arm portions is provided with a balance adjusting means for balancing with the reaction force of the cleaning water, and the cleaning water is supplied to the arm not provided with the balance adjusting means. Since a plurality of injection ports to be injected are formed, a large amount of cleaning water can be injected at a time with one injection without increasing the amount of cleaning water to be injected, while maintaining the rotational balance of the cleaning nozzle. Therefore, dirt such as heavy solids that could not be removed conventionally can be washed away like flash water, and the cleaning power is improved. Further, when there is little dirt, the amount of cleaning water to be sprayed can be reduced, and the amount of cleaning water to be used can be saved. Moreover, the dishwasher which concerns on this invention can have all the effects of the said washing nozzle.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram showing the overall configuration of the dishwasher 1 according to Embodiment 1 of the present invention. Based on FIG. 1, the whole structure of the dishwasher 1 is demonstrated. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one. This dishwasher 1 is installed in a kitchen such as a home, and cleans tableware 13 such as tableware and cups used for meals and the like. Moreover, in this FIG. 1, the case where the tableware 13 is accommodated in the washing tank 11 is shown as an example.

  As shown in FIG. 1, the dishwasher 1 includes a main body 10 that forms an outline of the dishwasher 1, and is provided in the main body 10. The dishware 13 is accommodated in the dishwasher 1. The cleaning tank 11 to be performed, the cleaning tank 6 rotatably disposed on the bottom surface of the cleaning tank 11, and spraying the cleaning water 15 onto the dishes 13, the motor 31 and the casing part 32, are configured. The cleaning pump 3 for injecting the cleaning water 15 from the drain, the drain pump 5 for discharging the cleaning water 15 from the drain port 52 through the drain pipe 51, and the control device 4 for controlling the driving of the cleaning pump 3 and the drain pump 5. At least.

  The cleaning tank 11 has an opening on the front surface, and a tableware bowl 12 for placing tableware 13 can be arranged thereon. In FIG. 1, the case where the two tableware bowls 12 are arrange | positioned up and down in the washing tank 11 is shown as an example. The cleaning nozzle 6 is composed of two arm portions (a first arm 55 and a second arm 56) that are arranged on a target around the rotation shaft 20. That is, the cleaning nozzle 6 is formed such that the two arm portions protrude in the horizontal direction around the rotation shaft 20.

  A plurality of injection ports 61 for injecting the cleaning water 15 are irregularly formed in one arm portion (for example, the first arm 55), and the other arm portion (for example, the second arm 56). ) Is equipped with a weight 62 as balance adjusting means. The weight 62 has a function for balancing when the cleaning nozzle 6 is rotating. A magnet 7 is attached to the tip of the second arm 56. The magnet 7 has a function for detecting the rotational position of the cleaning nozzle 6.

  The cleaning pump 3 is driven by a motor 31 and circulates the cleaning water 15 by sucking and pressurizing the cleaning water 15 stored in the lower part of the cleaning tank 11 and spraying it from the injection port 61. The cleaning pump 3 is connected to the cleaning nozzle 6 by a rotating shaft 20. The rotating shaft 20 has a function of supporting the cleaning nozzle 6 and guiding the cleaning water 15 to the cleaning nozzle 6. The drain pump 5 is used for cleaning the tableware 13 after completion of the cleaning process and the rinsing process, and sucks the cleaning water 15 stored in the lower part of the cleaning tank 11, and discharges it through the drain pipe 51. 52 is discharged to the outside. The drain pipe 51 is disposed below the cleaning tank 11 so as to connect the lower portion of the cleaning tank 11 and the exhaust port 52.

  The control device 4 is composed of a microcomputer or the like, and has a function of comprehensively controlling the dishwasher 1 as a whole. The control device 4 controls the rotation of the cleaning nozzle 6 by controlling the driving of the cleaning pump 3 and the drainage pump 5 and adjusting the amount of the cleaning water 15 from the injection port 61. Further, the control device 4 can detect the rotational position of the cleaning nozzle 6. In FIG. 1, the control device 4 is illustrated as being provided outside the dishwasher 1 for the sake of convenience in order to explain the connection between the control device 4 and the reed switch 8. The main body 10 is housed. However, as illustrated, the control device 4 may be provided outside the main body 10 of the dishwasher 1.

  In addition, a reed switch 8 that is a position sensor for detecting the rotational position of the cleaning nozzle 6 is provided on the outer side wall of the cleaning tank 11. When the magnetic field from the magnet 7 installed at the tip of the second arm 56 is applied when the second arm 56 that constitutes the cleaning nozzle 6 approaches, the reed switch 8 It is output as an output signal. An output signal output from the reed switch 8 is input to the control device 4. That is, the control device 4 detects the rotational position of the cleaning nozzle 6 based on the output signal from the reed switch 8.

  Further, a filter 14 for collecting leftovers attached to the dishes 13 washed with the washing water 15 is detachably provided on the bottom surface of the washing tank 11. In addition, the wavy line shown in the drawing represents the cleaning water 15 ejected from the cleaning nozzle 6. In addition, a door or an operation unit (not shown) is provided on the front or upper surface of the dishwasher 1. Further, although not shown, the control device 4 is connected to the cleaning pump 3 and the drainage pump 5 and controls the cleaning pump 3 and the drainage pump 5.

  FIG. 2 is a plan view showing the dishwasher 1 as seen through from above. Based on FIG. 2, the arrangement | positioning relationship of each component in the washing tank 11 is demonstrated. In FIG. 2, the lower side of the paper represents the front side of the dishwasher 1, and the upper side of the paper represents the rear side of the dishwasher 1. Moreover, the arrows shown in FIG. 2 indicate the rotation direction of the cleaning nozzle 6. As shown in FIG. 2, the washing tub 11 is provided with a tableware bowl 12 on which tableware 13 is placed. The filter 14 is disposed on the back side of the cleaning tank 11.

  The cleaning nozzle 6 has a substantially rectangular planar shape (that is, corners constituting the rectangle are R-processed). The cleaning nozzle 6 is centered on the rotating shaft 20 provided at the center of the bottom surface of the cleaning tank 11, that is, the first arm 55 and the second arm 56 are point-symmetric with respect to the rotating shaft 20. It is provided to become. The cleaning nozzle 6 is rotated by the cleaning water 15 sprayed from a plurality of spray ports 61 formed in the first arm 55. The reed switch 8 provided on the outer side wall of the cleaning tank 11 is turned on / off by the magnetic force of the magnet 7 provided at the tip of the second arm 56 of the cleaning nozzle 6.

  1 and 2 show an example in which the weight 62 is attached to the tip of the second arm 56, but the present invention is not limited to this. For example, the weight 62 may be attached to the upper surface or the lower surface of the second arm 56. Moreover, although the case where the five injection ports 61 are formed is shown as an example, the number of the injection ports 61 is not limited to five. Moreover, although the case where the opening shape of the injection port 61 is elliptical is shown as an example, the opening shape of the injection port 61 is not limited to the elliptical shape.

  FIG. 3 is an explanatory diagram for explaining the cleaning nozzle 6 in detail. Based on FIG. 2, the detailed structure of the washing nozzle 6 which is the characteristic matter of Embodiment 1 is demonstrated. 3A is a plan view showing the state of the cleaning nozzle 6 as viewed from above, and FIG. 3B is a longitudinal sectional view showing the AA cross section of the cleaning nozzle 6. Further, the center line 70 indicates the vertical center line of the rotating shaft 20. As shown in FIG. 3A, the first arm 55 has a plurality of injection ports 61, and the second arm 56 has a weight 62 and a magnet 7 attached thereto. The injection port 61 may be formed in the second arm 56, and the weight 62 and the magnet 7 may be attached to the first arm 55.

  As shown in FIG. 3B, the cleaning nozzle 6 is rotatably supported by the rotating shaft 20. The rotating shaft 20 supports the cleaning nozzle 6 and functions as a conduit for feeding the cleaning water 15 supplied from the cleaning pump 3. Then, the cleaning water 15 fed to the cleaning nozzle 6 via the rotary shaft 20 is jetted from a plurality of jet ports 61 formed in the first arm 55. In addition, although the case where the several injection port 61 is formed irregularly in the 1st arm 55 is shown as an example, it is not limited to the case illustrated here.

  Here, the cleaning operation of the dishwasher 1 will be described. When the cleaning operation or the rinsing operation is started, the control device 4 drives the cleaning pump 3. The cleaning water 15 stored in the lower part of the cleaning tank 11 is sucked and pressurized by driving the cleaning pump 3. The cleaning water 15 is supplied to the cleaning nozzle 6 via the rotating shaft 20 and is injected from a plurality of injection ports 61 formed in the first arm 55 of the cleaning nozzle 6. At this time, the first arm 55 generates a reaction force F corresponding to the injection amount when the cleaning water 15 is injected. The cleaning nozzle 6 is rotated in a predetermined direction (the direction of the arrow shown in FIG. 2) by the horizontal component Fh of the reaction force F generated in the first arm 55. The vertical component of the reaction force F is Fv.

  The cleaning nozzle 6 is continuously rotated by the cleaning pump 3 driven until a predetermined time has elapsed or an end instruction is given, and continues to rotate to clean or rinse the tableware 13. Do. When the cleaning operation or the rinsing operation ends, the control device 4 stops the driving of the cleaning pump 3. When the cleaning pump 3 stops, the injection of the cleaning water 15 from the injection port 61 ends, and the rotation of the cleaning nozzle 6 stops. Thereafter, the control device 4 drives the drainage pump 5. When the drain pump 5 is driven, the cleaning water 15 used for cleaning and stored in the lower part of the cleaning tank 11 is discharged from the drain port 52 through the drain pipe 51.

  FIG. 4 is an explanatory diagram for explaining the injection amount of the cleaning water 15 injected to the predetermined area (1) when the conventional cleaning nozzle 106 makes one rotation. FIG. 4A is a graph showing the relationship between the time for which the cleaning nozzle 106 makes one rotation (horizontal axis) and the injection amount of the cleaning water 15 to be injected (vertical axis), and FIG. FIG. 5 is a schematic explanatory diagram illustrating a case where cleaning water 15 is jetted from an ejection port 161 of a washing nozzle 106 into an area (1). The conventional cleaning nozzle described in FIG. 4 has 106 and two arm portions (first arm 155 and second arm 156) as shown in FIG. 4 (b). The case where the injection port 161 is formed is assumed.

  When the injection ports 161 are formed in both the first arm 155 and the second arm 156 facing the rotating shaft 20 that rotates the cleaning nozzle 106 as in the conventional cleaning nozzle 106 shown in FIG. While the nozzle 106 makes one revolution, the cleaning water 15 is jetted from the first arm 155 and the second arm 156 toward the area (1). That is, as shown in FIG. 4A, when the cleaning nozzle 106 rotates once, the cleaning water 15 is sprayed twice toward the area (1) and hits the tableware 13 stored in the area (1). It is like that.

  FIG. 5 is an explanatory diagram for explaining the injection amount of the cleaning water 15 injected into the predetermined area (1) when the cleaning nozzle 6 according to Embodiment 1 makes one rotation. FIG. 5A is a graph showing the relationship between the time for which the cleaning nozzle 6 makes one rotation (horizontal axis) and the injection amount of the cleaning water 15 to be injected (vertical axis), and FIG. It is the schematic explanatory drawing which showed as an example the case where the washing water 15 is jetted from the jet nozzle 61 of the washing nozzle 6 to the area (1). The number of injection ports 61 (or the total opening area of the injection ports 61) formed in the first arm 55 of the cleaning nozzle 6 is formed in the first arm 155 and the second arm 156 of the conventional cleaning nozzle 106. It is assumed that the number is the same as the number of the ejection ports 161 (or the total opening area of the ejection ports 161).

  As in the cleaning nozzle 6 shown in FIG. 5, the injection port 61 is formed only in the first arm 55 of the first arm 55 and the second arm 56 that face the rotating shaft 20 that rotates the cleaning nozzle 6. In this case, the cleaning water 15 is jetted from only the first arm 155 toward the area (1) while the cleaning nozzle 6 rotates once. That is, as shown in FIG. 5A, when the cleaning nozzle 6 makes one rotation, the cleaning water 15 is sprayed once toward the area (1) and hits the tableware 13 accommodated in the area (1). It is like that.

  Accordingly, while the total amount of spray applied to the tableware 13 accommodated in the area (1) during one rotation of the cleaning nozzle 6 is the same, the amount of spray applied by one injection of the cleaning water 15 is the same as the cleaning nozzle 6. Is more. That is, a large amount of the washing water 15 can be applied to the tableware 13 accommodated in the area (1) by one injection of the washing water 15. As described above, the dishwasher 1 can apply a large amount of the washing water 15 at one time by one injection without increasing the absolute amount of the jetting water of the washing water 15.

  Therefore, with the conventional washing nozzle 106, dirt such as heavy solid matter adhering to the tableware 13 that could not be dropped can be washed away by causing the washing water 15 to collide with the tableware 13 like flash water. Therefore, it is possible to improve the cleaning power. In addition, since the cleaning power is improved, when the amount of dirt adhering to the tableware 13 is small, the spray amount of the cleaning water 15 can be reduced, and the cleaning water 15 used for cleaning the tableware 13 can be reduced. There is an effect that can be saved. That is, by providing the injection port 61 only in the first arm 55 like the cleaning nozzle 6, a large amount of the cleaning water 15 can be sprayed at once and applied to the dishes 13.

  FIG. 6 is an explanatory diagram for explaining the mass m and the arrangement position of the weight 62. Based on FIG. 6, the mass m and the arrangement position of the weight 62 will be described in relation to the reaction force F generated when the cleaning water 15 is injected from the injection port 61. Since the cleaning nozzle 6 forms the injection port 61 only in the first arm 55, as shown in FIG. 6, the cleaning nozzle 15 is cleaned by the cleaning water 15 injected from the injection port 61 at a predetermined pressure p. A reaction force F is generated in the direction opposite to the spray direction of the cleaning water 15 at the position of the rotation center, that is, the distance L1 from the vertical center line 70 of the rotation shaft 20.

  The cleaning nozzle 6 is rotated by the horizontal component Fh of the reaction force F. In order to balance the rotation of the cleaning nozzle 6, a weight 62 having a mass m is disposed on the second arm 56 at a distance L 2 from the center line 70. At this time, if the gravitational acceleration is g, the second arm 56 can be loaded with a load of f≈m × g. Therefore, by setting and arranging the weight 62 so as to satisfy Fv × L1≈m × g × L2, it is possible to balance the load of the cleaning nozzle 6 that rotates during cleaning, and the rotation of the cleaning nozzle 6 can be reduced. Can be smooth. In addition, since the weights 62 are set in this way, the injection ports 61 can be formed without making the arrangement of the injection ports 61 particularly regular.

  During the cleaning operation or the rinsing operation of the tableware 13, the cleaning nozzle 6 is rotating. The magnetic force is applied to the reed switch 8 and the reed switch 8 is turned on only when the magnet 7 attached to the tip of the second arm 56 of the cleaning nozzle 6 approaches the reed switch 8. Further, the number of rotations of the cleaning nozzle 6 during the cleaning operation or the rinsing operation is substantially constant. Therefore, the reed switch 8 repeats ON and OFF periodically. The control device 4 can detect that the cleaning nozzle 6 is rotating by the control device 4 monitoring the periodic ON state of the reed switch 8.

  Therefore, when the reed switch 8 is not regularly turned on in spite of the cleaning operation or the rinsing operation, the control device 4 determines that the cleaning nozzle 6 is not rotating normally, and the tableware Inform the user of the cleaning machine 1 that an abnormality has occurred. This notification may be performed by a not-shown notification means that can generate a voice message or a buzzer sound. In this way, it is possible to improve the usability of the user by performing the abnormality notification.

  In the first embodiment, the case where the weight 62 and the magnet 7 are separately configured has been described as an example. However, the present invention is not limited to this. For example, the weight 62 and the magnet 7 may be integrated by configuring the weight 62 with a metal material such as stainless steel that can be magnetized. If the weight 62 and the magnet 7 can be integrated, the number of components can be reduced, and the labor and cost required for manufacturing the dishwasher 1 can be reduced. Moreover, although the case where the magnet 7 is installed at the tip of the second arm 56 has been described as an example, the magnet 7 may be installed at the tip of the first arm 55. Furthermore, although the case where the reed switch 8 is provided on the outer side wall of the cleaning tank 11 has been described as an example, it may be provided at the bottom of the cleaning tank 11. At this time, the magnet 7 may be installed on the lower surface side of the cleaning nozzle 6.

  In the first embodiment, the case where the reed switch 8 is a position sensor that can detect the magnetic force of the magnet 7 has been described as an example. However, for example, when the reed switch 8 is configured by a Hall element that is a sensor that can detect the magnetic force. Good. The Hall element is a magnetic sensor utilizing the Hall effect, and can convert the magnetic force generated by the magnet 7 into an electric signal. If the reed switch 8 is configured using this Hall element, the magnet 7 can be detected with high sensitivity, and the rotational position of the cleaning nozzle 6 can be detected with high accuracy.

Embodiment 2.
FIG. 7 is an explanatory diagram for explaining the cleaning nozzle 6a according to the second embodiment of the present invention in detail. Based on FIG. 7, the detailed structure of the washing nozzle 6a which is the characteristic matter of Embodiment 2 is demonstrated. FIG. 7A is a plan view showing the state of the cleaning nozzle 6a as viewed from above, and FIG. 7B is a longitudinal sectional view showing a BB section of the cleaning nozzle 6a. In the second embodiment, the differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. The overall appearance of the dishwasher is the same as that of the dishwasher 1 according to Embodiment 1 (see FIG. 1).

  The cleaning nozzle 6a is composed of two arm portions (a first arm 55a and a second arm 56a) that are arranged on a point object around the rotation shaft 20. A plurality of injection ports 61a are formed in one arm portion (for example, the first arm 55a). In the cleaning nozzle 6 of the first embodiment, the weight 62 is attached to the other arm part (for example, the second arm 56) to balance the cleaning nozzle 6 during rotation. In the cleaning nozzle 6a of the form 2, the weight 62 is not attached, and a balance is obtained when the cleaning nozzle 6a is rotated.

  As shown in FIG. 7A, the second arm 56a is not equipped with a weight 62, but is a water reservoir 65 (balance adjusting means for storing cleaning water 15 supplied from the cleaning pump 3). Ballast) is provided. The cleaning nozzle 6a is not substantially rectangular as the cleaning nozzle 6 of the first embodiment, and the width of the short part of the second arm 56a is wider than the width of the short part of the first arm 55a. The first arm 55a and the second arm 56a have different planar shapes. That is, the second arm 56a is configured in the same shape as the first arm 55a from the center line 70 to the predetermined position D, but gradually decreases from the predetermined position D toward the distal end portion. The water reservoir 65 is formed by expanding the width of the water and increasing the plane area of the first arm 55a.

  Specifically, in the water reservoir 65, the two side surfaces of the longitudinal portion constituting the second arm 56a have an angle θ from the predetermined position D1 to the predetermined position D2 (the horizontal center line of the rotary shaft 20 and the first side). The angle of the short side portion is widened at an angle (with respect to each side surface constituting the long portion of the two arms 56a), and from the predetermined position D2 to the predetermined position D3 is parallel to the side surfaces constituting the first arm 55a. Thus, the short portion of the second arm 56a is configured at the predetermined position D3. Further, the inside of the water reservoir 65 corresponding to the predetermined position D3 is R-processed to have a predetermined diameter R.

  Further, as shown in FIG. 7B, the bottom surfaces of the first arm 55 a and the second arm 56 a are provided with inclined portions 66 that are inclined so as to descend from the respective tip portions toward the center line 70. . The inclined portion 66 is formed so as to increase by a predetermined height (h) from the rotation shaft 20 that is the rotation center of the cleaning nozzle 6a toward the tip portion. A magnet 7 is attached to the tip of the second arm 56a in the same manner as the cleaning nozzle 6 of the first embodiment. The magnet 7 may be attached to the tip of the first arm 55a, or may be attached to the lower surface side of the second arm 56a or the first arm 55a according to the installation position of the reed switch 8.

  Here, the cleaning operation of the dishwasher 1, particularly the rotation operation of the cleaning nozzle 6a will be described. When the cleaning operation or the rinsing operation is started, the control device 4 drives the cleaning pump 3. The cleaning water 15 stored in the lower part of the cleaning tank 11 is sucked and pressurized by driving the cleaning pump 3. The cleaning water 15 is supplied to the cleaning nozzle 6a via the rotating shaft 20, and is injected from a plurality of injection ports 61a formed in the first arm 55a of the cleaning nozzle 6a. At this time, a reaction force F corresponding to the injection amount at the time of the injection of the cleaning water 15 is generated in the first arm 55a. The cleaning nozzle 6a is rotated in a predetermined direction by the horizontal component Fh of the reaction force F generated in the first arm 55a. The vertical component of the reaction force F is Fv.

  Next, determination of the volume ΔV (ml) of the water reservoir 65 will be described. The volume ΔV of the water reservoir 65 will be described in relation to the reaction force F generated when the cleaning water 15 is injected from the injection port 61a. The volume ΔV of the water reservoir 65 is larger than the volume V of the first arm 55a. Here, assuming that the specific gravity of water is ρ and the acceleration of gravity is g, a load of f = ΔV × ρ × g is applied to the second arm 56a at a distance L2 from the center line 70. Further, since the cleaning nozzle 6a forms the injection port 61a only in the first arm 55a, as shown in FIG. 7B, the cleaning nozzle 6a is driven by the cleaning water 15 injected from the injection port 61a at a predetermined pressure p. In addition, a reaction force F is generated in a direction opposite to the injection direction of the cleaning water 15 at a distance L1 from the center line 70.

  Therefore, by setting the volume ΔV of the water reservoir 65 so as to satisfy Fv × L1≈ΔV × ρ × g × L2, it is possible to balance the load of the cleaning nozzle 6a that rotates during cleaning. 6a can be smoothly rotated. That is, the predetermined positions D1 to D3, the predetermined angle θ, the predetermined diameter R, and the predetermined height h are determined so as to satisfy Fv × L1≈ΔV × ρ × g × L2, and the water reservoir 65 is formed. You can do it. By configuring the cleaning nozzle 6a in this way, it is possible to achieve a balance when rotating without providing the weight 62, to reduce the number of components, and to improve the assembly of the cleaning nozzle 6a. Can do.

  Since the inclined portion 66 is formed on the bottom surface of the cleaning nozzle 6a, when the cleaning operation and the rinsing operation are finished, the cleaning water 15 inside the cleaning nozzle 6a flows in the direction of the rotating shaft 20, and the rotating shaft 20 and the rotating shaft rotate. The water is drained from the gap between the shafts 20. That is, by providing the inclined portion 66 in the cleaning nozzle 6a, the cleaning water 15 inside the cleaning nozzle 6a can be drained quickly and smoothly. Further, dirt residue, detergent residue, residual water, etc. in the cleaning nozzle 6a can be reduced.

  Similarly, since the inner side surface (two side surfaces of the longitudinal portion at the predetermined position D1 and the predetermined position D2) is inclined at an angle θ, the washing water 15 of the water reservoir 65 is drained quickly and smoothly. it can. Further, dirt residue, detergent residue, residual water, etc. in the water reservoir 65 can be reduced. In addition, since the corner portion of the water reservoir 65 corresponding to the predetermined position D3 is R-processed, there is no edge in the corner portion of the water reservoir 65, and dirt residue and detergent residue inside the water reservoir 65, Residual water can be further reduced.

Embodiment 3.
FIG. 8 is a plan view showing the cleaning nozzle 6b according to Embodiment 3 of the present invention as viewed from above. Based on FIG. 8, the detailed structure of the washing nozzle 6b, which is a feature of the third embodiment, will be described. In the third embodiment, the difference from the first embodiment and the second embodiment described above will be mainly described, and the same parts as those in the first embodiment and the second embodiment are denoted by the same reference numerals. Therefore, the description will be omitted. The overall appearance of the dishwasher is the same as that of the dishwasher 1 according to Embodiment 1 (see FIG. 1).

  As shown in FIG. 8, the cleaning nozzle 6b is composed of three arm portions (a first arm 55b, a second arm 56b, and a third arm 57b) arranged around the rotation shaft 20. That is, the cleaning nozzle 6b is formed by projecting the three arm portions in the horizontal direction around the rotation shaft 20. A plurality of injection ports 61b are formed in two arm portions (for example, the first arm 55b and the second arm 56b), and one arm portion (for example, the third arm 57b) is provided with balance adjusting means. A weight 62b having a certain mass m and a magnet 7 are mounted. In the first embodiment and the second embodiment, the balance at the time of rotation of the cleaning nozzle constituted by the two arm portions has been described. However, in the third embodiment, the washing nozzle 6b constituted by the three arm portions. The balance at the time of rotation will be described.

  As shown in FIG. 8, the angle formed by the first arm 55b and the second arm 56b is α, the angle formed by the second arm 56b and the third arm 57b is β, and the angle formed by the third arm 57b and the first arm 55b. When γ is set, the position of each arm portion is determined so that α <120 °. Further, when the length of the first arm 55b is A, the length of the second arm 56b is B, and the length of the third arm 57b is C, the length of each arm portion is determined so that A ≧ B. is doing. And since the injection port 61b was formed by being dispersed in the first arm 55b and the second arm 56b, the workability of the injection port 61b can be improved without being concentrated in one arm part.

  Here, the cleaning operation of the dishwasher 1, particularly the rotation operation of the cleaning nozzle 6b will be described. When the cleaning operation or the rinsing operation is started, the control device 4 drives the cleaning pump 3. The cleaning water 15 stored in the lower part of the cleaning tank 11 is sucked and pressurized by driving the cleaning pump 3. The cleaning water 15 is supplied to the cleaning nozzle 6b via the rotating shaft 20, and is sprayed from a plurality of injection ports 61b formed in the first arm 55b and the second arm 56b of the cleaning nozzle 6b. At this time, a reaction force F is generated in the first arm 55b and the second arm 56b according to the injection amount when the cleaning water 15 is injected. The cleaning nozzle 6b is rotated in a predetermined direction by the horizontal component of the reaction force F generated in the first arm 55b and the second arm 56b by Fh. The vertical component Fv of the reaction force F is assumed.

  Next, the mass m and the arrangement position of the weight 62b will be described in relation to the reaction force F generated when the cleaning water 15 is ejected from the ejection port 61b. In FIG. 8, the center of gravity 74 represents the total load in the vertical component of the cleaning water 15 sprayed from the spray ports 61 b of the first arm 55 b and the second arm 56 b. That is, the reaction force F is applied by the cleaning water 15 injected from the injection port 61b at a predetermined pressure p in the direction opposite to the injection direction of the cleaning water 15 at the center of gravity 74 at the position L1 from the center line 70 of the rotating shaft 20. Will occur. This reaction force F causes the cleaning nozzle 6b to rotate.

  In order to balance the rotation of the cleaning nozzle 6b, the angle α, the angle β, and the angle γ are determined so that the third arm 57b is arranged on a straight line connecting the center of gravity 74 and the center of the rotation shaft 20. At the same time, a weight 62b having a mass m is disposed and mounted on the third arm 57b at a distance L2 from the center line 70. At this time, when the gravitational acceleration is g, a load of f≈m × g can be applied to the third arm 57b. Therefore, by arranging the weight 62 at a position satisfying Fv × L1≈m × g × L2, it is possible to balance the load of the cleaning nozzle 6b that rotates during cleaning, and to smoothly rotate the cleaning nozzle 6b. .

  By setting α <120, the cleaning water 15 can be intensively injected from the injection port 61b to a predetermined area (for example, a narrow area), and a large amount of the cleaning water 15 can be discharged at a time by one injection. You can guess. Therefore, with the conventional washing nozzle 106, dirt such as heavy solid matter adhering to the tableware 13 that could not be dropped can be washed away by causing the washing water 15 to collide with the tableware 13 like flash water. Therefore, it is possible to improve the cleaning power. In addition, since the cleaning power is improved, when the amount of dirt adhering to the tableware 13 is small, the spray amount of the cleaning water 15 can be reduced, and the cleaning water 15 used for cleaning the tableware 13 can be reduced. There is an effect that can be saved.

  Further, since the length of the first arm 55b and the second arm 56b and the mass of the weight 62b are determined so that Fv × L1≈m × g × L2, it can be freely set according to the formation position of the injection port 61b. This increases the degree of freedom in designing the cleaning nozzle 6b. Therefore, it becomes possible to reduce the portion of the member where the injection port 61b is not formed, improve the workability of the injection port 61b, and suppress the increase in the weight of the cleaning nozzle 6b to the minimum. Instead of providing the weight 62b on the third arm 57b, the water reservoir 65 may be provided as in the cleaning nozzle 6a of the second embodiment to achieve balance.

Embodiment 4 FIG.
FIG. 9 is a schematic configuration diagram showing an overall configuration of a dishwasher 80 according to Embodiment 4 of the present invention. Based on FIG. 9, the whole structure of the dishwasher 80 is demonstrated. The dishwasher 80 is installed in a kitchen at home or the like, and cleans tableware 13 such as tableware and cups used for meals and the like. Further, FIG. 9 shows an example in which the tableware 13 is accommodated in the cleaning tank 11. In the fourth embodiment, the differences from the first to third embodiments will be mainly described, and the same parts as those in the first to third embodiments are denoted by the same reference numerals. Therefore, the description will be omitted.

  The cleaning nozzle 6 c of the dishwasher 80 is provided with a tower nozzle 76 at the center of rotation, and the cleaning water 15 is also jetted from the tip of the tower nozzle 76. That is, the cleaning nozzle 6c is configured by two arm portions (first arm 55c and second arm 56c) that are arranged on a point object around the rotating shaft 20, and a tower nozzle 76 that is integrally structured with the two arm portions. It has been done. A plurality of injection ports 61 c are formed in one arm portion (for example, the first arm 55 c), and one injection port 77 is formed in the tip portion of the tower nozzle 76. Further, a weight 62c and a magnet 7 which are balance adjusting means are attached to the tip of the other arm (for example, the second arm 56c).

  The tower nozzle 76 is arranged such that its center line is substantially the same as the center line 70 of the rotating shaft 20. Further, the tower nozzle 76 has a frustoconical shape in the longitudinal cross section, and the inside is hollow to allow the cleaning water 15 to conduct. The tower nozzle 76 rotates while the cleaning water 15 is jetted from the jet port 77 formed at the tip as the cleaning nozzle 6c rotates. The tower nozzle 76 may be formed integrally with the cleaning nozzle 64c, or a separate nozzle may be attached to the cleaning nozzle 64c.

  FIG. 10 is an explanatory diagram for explaining the cleaning nozzle 6c in detail. Based on FIG. 10, the detailed structure of the washing nozzle 6c, which is a feature of the second embodiment, will be described. FIG. 10A is a plan view showing a state of the cleaning nozzle 6c as viewed from above, and FIG. 10B is a longitudinal sectional view showing a CC cross section of the cleaning nozzle 6c. FIG. 10B shows an example in which the bottom surfaces of the first arm 55c and the second arm 56c are inclined so as to become higher from the center of rotation toward each tip.

  As shown in FIG. 10A, the first arm 55c has a plurality of injection ports 61c, and the second arm 56c has a weight 62c and a magnet 7 attached thereto. The injection port 61 may be formed in the second arm 56c, and the weight 62c and the magnet 7 may be attached to the first arm 55c. The injection port 77 formed in the tower nozzle 76 is formed such that the horizontal center line of the rotary shaft 20 and the longitudinal center line of the injection port 77 are at a predetermined angle θ2, as shown in FIG. ing. Further, the lower side of the injection port 77 formed in the tower nozzle 76 is disposed at a distance L3 from the bottom bottom of the cleaning nozzle 6c as shown in FIG. 10B.

  As shown in FIG. 10B, the cleaning nozzle 6c is rotatably supported by the rotary shaft 20, and the cleaning water 15 fed from the rotary shaft 20 is supplied with the first arm 55c, the second arm 56c, and the tower. The nozzle 76 is supplied. The cleaning water 15 fed to the cleaning nozzle 6 c via the rotary shaft 20 is jetted from the jet port 61 c of the first arm 55 c and the jet port 77 of the tower nozzle 76. In addition, although the case where the several injection port 61 is formed irregularly in the 1st arm 55 is shown as an example, it is not limited to the case illustrated here.

  Here, the mass m and the arrangement position of the weight 62c will be described in relation to the reaction force F and the reaction force F2 generated when the cleaning water 15 is ejected from the ejection port 61c and the ejection port 77. Since the cleaning nozzle 6c has the injection port 61 formed in the first arm 55c, as shown in FIG. 10B, the cleaning nozzle 6c has a rotating shaft by the cleaning water 15 injected at a predetermined pressure p from the injection port 61. The reaction force F is generated in the direction opposite to the direction in which the cleaning water 15 is sprayed at the position of the distance L1 from the 20 center line 70. Further, since one injection port 77 is formed in the tower nozzle 76, a reaction force F2 is generated by the cleaning water 15 injected from the injection port 77 at a predetermined pressure, as shown in FIG. Will do.

  The cleaning nozzle 6c is rotated by the horizontal component Fh of the reaction force F and the horizontal component F2h of the reaction force F2. In order to balance the rotation of the cleaning nozzle 6c, a weight 62c having a mass m is disposed on the second arm 56c at a distance L2 from the center line 70 of the rotary shaft 20. Here, when the gravitational acceleration is g, the weight 62c is set and arranged so as to satisfy Fv × L1≈m × g × L2 + F2v × L3, thereby balancing the load of the cleaning nozzle 6c rotating during cleaning. The cleaning nozzle 6c can be rotated smoothly.

  When this equation is modified, Fv × L1≈ {m + F2v × L3 / (g × L2)} × g × L2. From this modified formula and the formula Fv × L1≈m × g × L2 shown in the first embodiment, m = m−F2v × L3 / (g × L2). That is, the mass of the weight 62c can be made lighter than the weight 62 of the first embodiment by the value of the load of the injection reaction force F2v of the tower nozzle 76. In addition, since the tower nozzle 76 having the injection port 77 is provided, the washing water 15 can be collided with the tableware 13 that cannot be washed only by the injection port 61c, and the mass of the weight 62c for balancing is reduced. Can be light.

Embodiment 5 FIG.
FIG. 11 is an explanatory diagram for explaining in detail the cleaning nozzle 6d according to the fifth embodiment of the present invention. Based on FIG. 11, a detailed configuration of the cleaning nozzle 6d, which is a feature of the fifth embodiment, will be described. FIG. 11A is a plan view showing the state of the cleaning nozzle 6d as viewed from above, and FIG. 11B is a longitudinal sectional view showing a DD cross section of the cleaning nozzle 6d. In the fifth embodiment, differences from the above-described first to fourth embodiments will be mainly described, and the same parts as those in the first to fourth embodiments are denoted by the same reference numerals. Therefore, the description will be omitted. The overall appearance of the dishwasher is the same as that of the dishwasher 80 according to Embodiment 2 (see FIG. 9).

  The cleaning nozzle 6 d is provided with a tower nozzle 76 at the center of rotation, and the cleaning water 15 is also ejected from the tip of the tower nozzle 76. That is, the cleaning nozzle 6d is configured by two arm portions (first arm 55d and second arm 56d) arranged on the point object with the rotation shaft 20 as the center, and a tower nozzle 76 integrally formed with the two arm portions. It has been done. A plurality of injection ports 61 d are formed in one arm portion (for example, the first arm 55 d), and one injection port 77 is formed in the tip portion of the tower nozzle 76.

  In the cleaning nozzle 6c of the fourth embodiment, the weight 62c is attached to the other arm portion (for example, the second arm 56c) to balance the cleaning nozzle 6c during rotation. In the cleaning nozzle 6d according to the fifth aspect, the balance during rotation of the cleaning nozzle 6d is taken without mounting the weight 62c. That is, similarly to the cleaning nozzle 6a described in the second embodiment, a water reservoir 65d (ballast) that is a balance adjusting means is formed on the second arm 56d so as to balance the rotation of the cleaning nozzle 6d. It is.

  Here, the determination of the volume ΔV2 (ml) of the water reservoir 65d will be described. The volume ΔV2 of the water reservoir 65d will be described in relation to the reaction force F and the reaction force F2 that are generated when the cleaning water 15 is ejected from the ejection port 61d and the ejection port 77. The volume ΔV2 of the water reservoir 65d is larger than the volume V of the first arm 55d. Here, when the specific gravity of water is ρ and the acceleration of gravity is g, a load of f = ΔV2 × ρ × g is applied to the second arm 56d at a distance L2 from the center line 70.

  Therefore, if the vertical components of the reaction force F and the reaction force F2 are Fv and F2v, respectively, the volume ΔV2 of the water reservoir 65d is set so as to satisfy Fv × L1≈ΔV2 × ρ × g × L2 + F2v × L3. The load of the cleaning nozzle 6d that rotates during cleaning can be balanced, and the cleaning nozzle 6d can rotate smoothly. From this equation and the equation Fv × L1≈ΔV × ρ × g × L2 shown in the second embodiment, ΔV2 = ΔV−F2v × L3 / (ρ × g). That is, the volume ΔV2 of the water reservoir 65d can be made smaller than the water reservoir 65d of the second embodiment by the load value of the injection reaction force F2v of the tower nozzle 76. Further, since the tower nozzle 76 having the injection port 77 is provided, the washing water 15 can collide with the tableware 13 that cannot be washed only by the injection port 61c, and the water reservoir 65d for balancing is made small. Can be

Embodiment 6 FIG.
FIG. 12 is a schematic configuration diagram showing an overall configuration of a dishwasher 81 according to Embodiment 6 of the present invention. Based on FIG. 1, the whole structure of the dishwasher 81 is demonstrated. This dishwasher 81 is installed in a kitchen such as a home, and cleans tableware 13 such as tableware and cups used for meals and the like. Moreover, in this FIG. 1, the case where the tableware 13 is accommodated in the washing tank 11 is shown as an example. In the sixth embodiment, differences from the above-described first to fifth embodiments will be mainly described, and the same parts as those in the first to fifth embodiments are denoted by the same reference numerals. Therefore, the description will be omitted.

  As shown in FIG. 12, the dishwasher 81 includes a main body 10 that forms an outline of the dishwasher 81, and is provided in the main body 10. The dishware 13 is accommodated in the dishwasher 81. The cleaning tank 11 to be performed, the cleaning tank 6e which is rotatably disposed on the bottom surface of the cleaning tank 11 and injects the cleaning water 15 onto the tableware 13, the motor 31 and the casing part 32, and includes the cleaning nozzle 6e. The cleaning pump 3 for injecting the cleaning water 15 from the drain, the drain pump 5 for discharging the cleaning water 15 from the drain port 52 via the drain pipe 51, and the control unit 4 for controlling the driving of the cleaning pump 3 and the drain pump 5. At least.

  The cleaning tank 11 has an opening on the front surface, and a tableware bowl 12 for placing tableware 13 can be arranged thereon. In FIG. 12, the case where the two tableware bowls 12 are arrange | positioned in the washing tank 11 is shown as an example. The cleaning nozzle 6e is provided with a tower nozzle 76 at the center of rotation and a plurality of injection ports 61 on one side with respect to the center of rotation (described in detail in FIG. 13). A weight 62e is mounted on the side of the cleaning nozzle 6e where the injection port 61 is not formed. The weight 62e has a function of balancing with the ejection port 61 formed on one side from the rotation center of the cleaning nozzle 6e. And the tableware 13 is wash | cleaned by injecting the wash water 15 diagonally upward from the front-end | tip of the tower nozzle 76, and the jet nozzle 61. FIG.

  The cleaning pump 3 is driven by a motor 31 and circulates the cleaning water 15 by sucking and pressurizing the cleaning water 15 stored in the lower part of the cleaning tank 11 and spraying it from the tower nozzle 76 and the injection port 61. is there. The drainage pump 5 sucks the washing water 15 used for washing the tableware 13 after the washing process and the rinsing process, and discharges the washing water 15 to the outside through the drainage pipe 51. The drain pipe 51 is disposed below the cleaning tank 11 so as to connect the lower portion of the cleaning tank 11 and the exhaust port 52.

  The control unit 4 is configured by a microcomputer or the like and has a function of performing overall control of the dishwasher 81 as a whole. In addition, the control unit 4 controls the driving of the cleaning pump 3 and the drainage pump 5 and controls the rotation of the cleaning nozzle 6 e by adjusting the amount of the cleaning water 15 from the injection port 61. The control performed by the control unit 4 will be described in detail with reference to FIGS. The control unit 4 is provided with a storage unit 41 for storing various information as data. The type of the storage unit 41 is not particularly limited. For example, it may be constituted by a RAM (Random Access Memory), a flash memory, or the like.

  A reed switch 8, which is a position sensor for detecting the rotational position of the cleaning nozzle 6 e, is provided on the outer side wall of the cleaning tank 11. The reed switch 8 outputs a generated current as an output signal of a voltage value when a magnetic field from a magnet 7 installed at the tip of the cleaning nozzle 6e is applied when the cleaning nozzle 6e approaches. . An output signal output from the reed switch 8 is input to the control unit 4. In addition, a filter 14 that collects leftovers attached to the dishes 13 washed with the washing water 15 is detachably provided on the bottom surface of the washing tank 11.

  Furthermore, a vibration sensor 2 for detecting the vibration of the cleaning tank 11 is provided on the top wall of the cleaning tank 11. The vibration sensor 2 detects the vibration of the cleaning tank 11 and outputs it as a voltage value output signal. The output signal output from the vibration sensor 2 is input to the control unit 4 in the same manner as the output signal output from the reed switch 8. In addition, the wavy line shown in the drawing represents the cleaning water 15 ejected from the cleaning nozzle 6e. Further, a door and an operation unit (not shown) are provided on the front surface of the dishwasher 81.

  FIG. 13 is a perspective view showing a detailed configuration of the cleaning nozzle 6e. Based on FIG. 13, the detailed structure of the washing nozzle 6e will be described. As shown in FIG. 13, the cleaning nozzle 6e is attached to the rotary shaft 20 from the cleaning pump 3, and the injection port 61 is formed only on one side (one side) from the rotation center. Further, the center of rotation of the cleaning nozzle 6e (attachment position of the rotating shaft 20) is the center of the cleaning nozzle. In addition, a plate-like weight 62e for balancing the cleaning nozzle 6e is mounted on the side not provided with the ejection port 61 (the side opposite to the side where the ejection port 61 is formed). . Further, a magnet 7 for performing ON / OFF of the reed switch 8 is installed at the tip of the side where the weight 62e is mounted.

  The cleaning nozzle 6e configured as described above causes the cleaning water 15 sucked and pressurized by the cleaning pump 3 to be injected from the plurality of injection ports 61 provided in the cleaning nozzle 6e, and the injection amount at the time of the cleaning water injection It is rotated in a predetermined direction by a reaction force according to the above. That is, the dishwasher 81 rotates and drives the cleaning nozzle 6e by the cleaning water 15 sprayed from the spray nozzle 61 of the cleaning nozzle 6e without separately providing driving means such as a motor for driving the cleaning nozzle 6e to rotate. It is like that.

  12 and 13, the case where the central portion of the cleaning nozzle 6e is attached to the rotary shaft 20 has been described as an example, but the present invention is not limited to this. For example, the cleaning nozzle 6e includes the cleaning nozzle 6 (see FIG. 3) shown in the first embodiment, the cleaning nozzle 6b (see FIG. 7) shown in the second embodiment, and the cleaning nozzle 6c (see FIG. 7). 8), or a configuration similar to that of the cleaning nozzle 6d (see FIG. 11) shown in the fourth embodiment may be used.

  FIG. 14 is a schematic circuit configuration diagram showing a circuit configuration that connects the vibration sensor 2 and the control unit 4. Based on FIG. 14, the process until the output signal output from the vibration sensor 2 is input to the control unit 4 will be briefly described. As shown in FIG. 14, an output signal (voltage value) output from the vibration sensor 2 is input to an amplifier 71 that is an amplifier circuit and amplified. The output signal amplified by the amplifier 71 is reduced in the pulsating flow component by the smoothing circuit 72 and input to the A / D input port of the control unit 4. Then, conversion from an analog signal to a digital signal is executed and read by the control unit 4.

  FIG. 15 is an explanatory diagram for explaining the installation location of the vibration sensor 2. Based on FIG. 15, the preferable installation place of the vibration sensor 2 is demonstrated. As described above, the vibration sensor 2 is installed on the top wall of the cleaning tank 11. As shown in FIG. 15, the place where the largest amplitude is repeated when the top plate of the cleaning tank 11 vibrates is the vibration abdomen. Therefore, the vibration sensor 2 according to this embodiment is installed on the top plate outer wall of the cleaning tank 11 and at or near the place corresponding to the vibration abdomen.

  FIG. 16 is an explanatory diagram for explaining an example of control during aiming and cleaning. Based on FIG. 16, the control of aiming cleaning will be described. 16A, the inside of the cleaning tank 11 is equally divided into four areas (area (1) to area (4)) in the rotation direction of the cleaning nozzle 6e, and the coarse density of the tableware 13 in each divided area is obtained. The area (1) has a coarse density of “medium”, the area (2) has a coarse density of “small”, the area (3) has a coarse density of “medium”, and the area (4) has a coarse density of “large”. "Is shown as an example. FIG. 16B shows the rotation position of the cleaning nozzle 6e on the horizontal axis and the injection amount of the cleaning water 15 to be injected from the cleaning nozzle 6e on the vertical axis. The rotation position of the cleaning nozzle 6e and the cleaning nozzle 6e cause the injection. The relationship with the injection quantity of the wash water 15 is represented.

  As shown in FIG. 16, the control unit 4 determines the injection amount of the cleaning water 15 to be injected from the cleaning nozzle 6 e in accordance with the coarse / dense location detection performed based on the output signals output from the vibration sensor 2 and the reed switch 8. Control and perform aiming cleaning. That is, the control unit 4 weakens the injection amount of the cleaning water 15 in a place where the coarse density calculated by the coarse / dense place detection is “small” (for example, the area (2)) and places where the coarse density is “large” (for example, In the area (4), the injection amount of the cleaning water 15 is increased, and in the place where the coarse density is “medium” (for example, the area (1) and the area (3)), the injection amount of the cleaning water 15 is controlled to be moderate. To do.

  By aiming and cleaning in this way, it is possible to suppress the cleaning water 15 that collides with the top plate of the cleaning tank 11 without unnecessarily injecting excessive cleaning water 15 to a place where the coarse density is “small”. Become. In addition, when the large tableware 13 like a pot is accommodated in the washing tank 11, the tableware 13 will block | close, as a result, the output signal from the vibration sensor 2 will become small, and the injection of the washing water 15 will be carried out. The amount can become strong. Even in such a case, since a large amount of the washing water 15 collides with the dishes 13, the washing water 15 that collides with the top plate remains small, and the noise generated from the dish washing machine 81 is reduced. There is no hindrance to the reduction.

  As described above, since the injection port 61 for injecting the cleaning water 15 for cleaning the tableware 13 is formed only on one side with respect to the rotation center of the cleaning nozzle 6e disposed in the cleaning tank 11, the cleaning nozzle Driving means such as a motor for rotationally driving the motor 6e is not necessary, and wasteful washing water 15 can be suppressed at the time of aiming and washing, and noise generated when the washing water 15 collides with the main body 10 is reduced. can do. Moreover, since the inside of the washing tank 11 is equally divided, the time is equally divided according to the equal division, and the output integral value S is calculated, the coarse density of the tableware 13 for each area can be accurately determined and effective. Aiming and cleaning can be realized.

  In the cleaning nozzle 6 and the cleaning nozzle 6e, the case where the bottom surface is not inclined has been described as an example. However, as described in the second to fifth embodiments, the first arm 55 and the second arm 56 are inclined. You may do it. On the other hand, in the second to fifth embodiments, the case where the inclined portion is provided on the bottom surface of the cleaning nozzle has been described as an example. However, as described in the first embodiment, the cleaning nozzle is not provided with an inclination. Also good. In addition, a cleaning nozzle configured with three arms as in the third embodiment may be used as the cleaning nozzle in the fourth and fifth embodiments. Furthermore, it is also possible to use the cleaning nozzle 6 to the cleaning nozzle 6e for sprinklers, watering equipment, and the like.

It is a schematic block diagram which shows the whole structure of the dishwasher which concerns on Embodiment 1. It is a top view which shows the state seen through the tableware washing machine from the top. It is explanatory drawing for demonstrating a washing nozzle in detail. It is explanatory drawing for demonstrating the injection quantity of the wash water injected to a predetermined area when the conventional washing nozzle rotates 1 time. It is explanatory drawing for demonstrating the injection quantity of the washing water injected to a predetermined area when the washing nozzle which concerns on Embodiment 1 carries out 1 rotation. It is explanatory drawing for demonstrating the mass and arrangement position of a weight. It is explanatory drawing for demonstrating in detail the washing nozzle which concerns on Embodiment 2. FIG. It is a top view which shows the state which looked at the washing nozzle 6 which concerns on Embodiment 3 from the top. It is a schematic block diagram which shows the whole structure of the dishwasher which concerns on Embodiment 4. It is explanatory drawing for demonstrating a washing nozzle in detail. It is explanatory drawing for demonstrating in detail the washing nozzle which concerns on Embodiment 5. FIG. It is a schematic block diagram which shows the whole structure of the dishwasher which concerns on Embodiment 6. It is a perspective view which shows the detailed structure of a washing nozzle. It is a schematic circuit block diagram which shows the circuit structure which connects a vibration sensor and a control part. It is explanatory drawing for demonstrating the installation place of a vibration sensor. It is explanatory drawing for demonstrating an example of the control at the time of aiming and cleaning.

Explanation of symbols

  1 dishwasher, 2 vibration sensor, 3 washing pump, 4 control device, 5 drainage pump, 6 washing nozzle, 6a washing nozzle, 6b washing nozzle, 6c washing nozzle, 6d washing nozzle, 6e washing nozzle, 7 magnet, 8 lead Switch, 10 Main body, 11 Washing tank, 12 Tableware bowl, 13 Tableware, 14 Filter, 15 Washing water, 20 Rotating shaft, 31 Motor, 32 Casing part, 51 Drain pipe, 52 Drain port, 55 1st arm, 55a 1st 1 arm, 55b 1st arm, 55c 1st arm, 55d 1st arm, 56 2nd arm, 56a 2nd arm, 56b 2nd arm, 56c 2nd arm, 56d 2nd arm, 57b 3rd arm, 61 injection Mouth, 61a jet, 61b jet, 61c jet, 61d jet, 62 weight, 62b weight, 62 Weight 62e Weight 70 Center line 71 Amplifier 72 Smoothing circuit 76 Tower nozzle 77 Injector 80 Dishwasher 81 Dishwasher 106 Washer nozzle 161 Injector 155 First arm 156 Second arm.

Claims (19)

A cleaning nozzle that is attached to a rotating shaft and injects cleaning water while rotating around the rotating shaft,
The washing nozzle is
It has a plurality of arms protruding in the horizontal direction around the rotation axis,
Providing a balance adjusting means for balancing with a reaction force generated by spraying the cleaning water on any of the arms;
A plurality of injection ports for injecting the cleaning water are formed on an arm of the arm that is not provided with the balance adjusting means, and the arm is rotatable by a reaction force of the cleaning water injected from the injection port. Cleaning nozzle to do. The cleaning nozzle according to claim 1, wherein the balance adjusting unit is a weight. The washing nozzle has two arms;
The mass and arrangement position of the weight are
The cleaning nozzle according to claim 2, wherein the cleaning nozzle is set based on a predetermined distance L <b> 1 from the rotating shaft where the reaction force and the reaction force are generated. The washing nozzle has three arms,
An arm provided with the weight,
And arranged on a straight line connecting the center of gravity of the total load of washing water sprayed from the spray ports of the two arms formed with the spray ports and the center of the rotation shaft,
The mass and arrangement position of the weight are
The cleaning nozzle according to claim 2, wherein the cleaning nozzle is set based on a reaction force at the center of gravity and a distance L1 from the center of gravity to the rotation axis. The cleaning nozzle according to claim 1 , wherein the balance adjusting unit is a ballast made of the cleaning water. The washing nozzle has two arms;
The volume of the ballast,
The cleaning nozzle according to claim 5 , wherein the cleaning nozzle is set based on a predetermined distance L1 from the reaction shaft and the rotation shaft where the reaction force is generated. The washing nozzle has three arms,
An arm on which the ballast is formed,
And arranged on a straight line connecting the center of gravity of the total load of washing water sprayed from the spray ports of the two arms formed with the spray ports and the center of the rotation shaft,
The volume of the ballast,
The cleaning nozzle according to claim 5 , wherein the cleaning nozzle is set based on a reaction force at the center of gravity and a distance L1 from the center of gravity to the rotation axis. The ballast is
The two sides of the longitudinal portion of the arm in which the ballast is formed is inclined at a predetermined angle theta, to any of the claims 5-7, characterized in that formed by widening the width of the lateral portion of the arm The cleaning nozzle described. The cleaning nozzle according to any one of claims 4, 7 and 8, wherein an angle formed by two of the three arms formed with the injection port is smaller than 120 °. Three one arm of the two arms the injection port is formed of the arm length, as claimed in claim 4, 7, 8 or 9, characterized in that not less than the length of the other arm The cleaning nozzle according to any one of the above. A tower nozzle is provided on the upper side of the approximate rotation axis so that the center line is substantially the same as the vertical center line of the rotation axis,
The cleaning nozzle according to any one of claims 1 to 10 , wherein an injection port for injecting cleaning water is provided at a tip of the tower nozzle. The injection port of the tower nozzle is
The cleaning nozzle according to claim 11 , wherein a horizontal center line of the rotation shaft and a longitudinal center line of the injection port are formed at a predetermined angle θ2. The cleaning nozzle according to any one of claims 1 to 12 , wherein a bottom surface of the arm is inclined so as to descend toward the rotation axis. In the balance adjustment means as a weight,
The washing nozzle according to any one of claims 2 to 4 and 9 to 13 , wherein the weight is made of stainless steel. The cleaning nozzle according to any one of claims 1 to 14,
A dishwashing machine provided in a washing tank for storing dishes. The dish washer according to claim 15, wherein a magnet is provided at a tip of the washing nozzle, and a position sensor for detecting a rotational position of the washing nozzle by a magnetic field from the magnet is provided. The dishwasher according to claim 16, wherein the position sensor is constituted by a reed switch. The dishwasher according to claim 17, wherein a hall element is used as the reed switch. A control unit that performs rotation control of the cleaning nozzle by adjusting the amount of cleaning water sprayed from the ejection port of the cleaning nozzle;
A vibration sensor for detecting the vibration of the cleaning tank;
The controller is
The tableware according to any one of claims 16 to 18, wherein the amount of cleaning water sprayed from the spray port of the cleaning nozzle is adjusted according to output signals output from the vibration sensor and the position sensor. washing machine.

Images