JP2006198052A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher at a low cost capable of obtaining high-level and uniform washing power for dishes, provided with well-balanced washing nozzle constitution, and capable of reducing washing noise further. <P>SOLUTION: The dishwasher comprises: a washing tub 1; a dish basket 2 which houses dishes 2a and is arranged inside the washing tub 1; a washing pump 3 for pressurizing and circulating washing water; a heater 4 for heating the washing water; an arm nozzle 10 provided with a plurality of jetting holes 5 for jetting the washing water and pivoted freely rotatably by a nozzle bearing 9 communicated with the discharge port 8 of the washing pump 3; and a plurality of nozzles 11 freely rotatably provided to the arm nozzle 10. The nozzles 11 are rotated by the washing water flowing inside the arm nozzle 10 and are provided with jetting holes 13 for blowing off the washing water toward the dishes 2a, and since the nozzles 11 rotated while jetting the washing water toward the dishes are provided to the arm nozzle 10 rotated by the reaction of the washing water discharged from the jetting holes 5, the washing water is uniformly blown to the dishes 2a, and the high-level and uniform washing power is obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dishwasher for washing dishes by spraying washing water from a washing nozzle toward the dishes.

  2. Description of the Related Art In recent years, dishwashers that wash tableware stored in a tableware basket with washing water sprayed from a nozzle that rotates in a washing tank have become mainstream.

  A conventional dishwasher of this type will be described with reference to FIGS.

  In FIG. 6, the dishwasher includes a washing tub 16 and a tableware basket 17 that accommodates the tableware 17 a and is disposed in the washing tub 16. The tableware 17 a is pressurized and heated by a washing pump 18 and a heater 19. Washed with a jet of washed water. Reference numeral 20 denotes a control device that controls a series of operations of a dishwasher for water supply, washing, rinsing, draining and drying.

  The cleaning nozzle 21 disposed in the lower space of the tableware basket 17 includes ejection holes 22 a, 22 b, 22 c, and 22 d that inject cleaning water toward the tableware basket 17. The cleaning nozzle 21 rotates substantially horizontally by the reaction force of the cleaning water ejected from the ejection holes 22a, 22b, 22c, and 22d, and has a shape as shown in FIG. That is, the shape is curved or bent in a direction delayed from the rotation direction. Reference numeral 23 denotes a nozzle bearing that rotatably supports the cleaning nozzle 21. Reference numeral 24 denotes an ejection trajectory by the ejection holes 22a, 22b, 22c, and 22d when the cleaning nozzle 21 rotates.

  When the tableware 17 a is stored in the tableware basket 17 and mounted in a predetermined position of the cleaning tank 16 and the operation is started, a water supply step of supplying a predetermined amount of cleaning water to the cleaning tank 16 is performed. Subsequently, the cleaning pump 18 pressurizes the cleaning water, and the pressurized cleaning water and detergent are ejected from the ejection holes 22a, 22b, 22c, and 22d of the cleaning nozzle 21. That is, the main washing process is executed.

  When the main washing process for a predetermined time is completed, a draining process for discharging washing water containing dirt washed away from the tableware 17a and the like to the outside is executed. Following this drainage process, washing water is rinsed in order to rinse the dishes that are contaminated with a water supply process that supplies new washing water, a main washing process, and detergents and leftovers (also called leftovers). The rinsing process ejected from the nozzle 21 and the draining process are continued, and these are repeated several times to complete the cleaning process.

  Since the ejection holes 22b, 22c, and 22d of the cleaning nozzle 21 have a lag angle A and B with respect to the ejection hole 22a, the ejection holes 22a, 22b, 22c, The jet wash water from 22d is not jetted at the same time (see, for example, Patent Document 1).

In addition, a recess, a water passage hole formed in the bottom surface of the recess, and a propeller that is rotated by the cleaning water sprayed from the water hole are rotatable on an arm provided rotatably in the cleaning tank. Some are provided and the propeller is used to disperse washing water (see, for example, Patent Document 2).
JP 7-227373 A Japanese Patent No. 3481135

  However, in the configuration of such a conventional dishwasher, the ejection trajectory 24 of the washing water ejected from the washing nozzle 21 is constant as shown in FIG. That is, the washing water is repeatedly ejected only to the tableware 17a set at a specific position. That is, in the tableware storage area (hereinafter referred to as the cleaning area) constituted by the tableware basket 17, the cleaning area where the cleaning water directly collides with the tableware and the cleaning area where the cleaning water collides indirectly and the cleaning effect is low. And exist.

  Therefore, in order to obtain a predetermined cleaning power in the entire cleaning area, it is necessary to increase the cleaning power in the cleaning area where the cleaning effect is low, and it is necessary to secure a sufficient secondary water flow. In other words, when the energy calculated from the ejection pressure and the flow rate from the ejection holes 22a, 22b, 22c, and 22d is referred to as cleaning water power, the conventional configuration of the cleaning nozzle 21 requires the cleaning water for the above reason. The power is excessive.

  Here, considering the collision sound when the washing water collides with the tableware 17a, the larger the jet pressure and flow rate, the larger the collision sound. Actually, since the ejection holes 22a, 22b, 22c, and 22d of the cleaning nozzle 21 are arranged close to each other, a single tableware 17a is simultaneously provided with a plurality of ejection holes 22a, 22b, 22c, and 22d. Wash water will collide. For this reason, the noise generated by the collision of the cleaning water is periodically generated with the rotation of the cleaning nozzle 21 with a high peak. The cleaning noise during operation is large in level and sensuous for the user.

  In addition, when the flow rate is increased, a collision sound of the cleaning water with the cleaning tank 16 or a dripping sound thereof is increased to further increase the cleaning noise.

  In addition, in the conventional dishwasher in which the washing water is sprinkled with a propeller, there is a problem that it is difficult to remove stains attached to the tableware and the usability is very bad just by spreading the washing water literally.

  The present invention solves the above-mentioned conventional problems, has a high level and uniform cleaning power for tableware, has a well-balanced cleaning nozzle configuration, and further achieves a reduction in cleaning noise, The purpose is to provide a dishwasher that is inexpensive.

  In order to solve the above-described conventional problems, the dishwasher of the present invention includes a washing tank, a dishwasher that accommodates dishware, and a washing pump that pressurizes and circulates washing water together with the dishware disposed in the washing tank, An arm nozzle having a heater for heating the cleaning water, a plurality of ejection holes for injecting the cleaning water, and rotatably supported by a nozzle bearing communicating with a discharge port of the cleaning pump; and the arm nozzle A plurality of nozzles that are rotatably provided, and the nozzles are rotated by the washing water flowing in the arm nozzles and have injection holes for blowing the washing water toward the tableware. The arm nozzle that rotates by reaction of the discharged wash water is equipped with a nozzle that rotates while spouting the wash water toward the dishes, so the wash water is sprayed evenly on the dishes and the high level. Uniform detergency is obtained and can provide a dishwasher having a good arm nozzle arrangement balanced. Further, by improving the cleaning efficiency due to the uniform cleaning performance of the arm nozzle, it is possible to reduce the size of the cleaning pump and reduce the cleaning noise, and to provide a dishwasher that is inexpensive in terms of cost.

  ADVANTAGE OF THE INVENTION The dishwasher of this invention can provide the dishwasher which can obtain a uniform high cleaning power with a high level with respect to tableware, and has a well-balanced arm nozzle structure.

  The first invention includes a washing tank, a dish case that houses tableware and is placed in the washing tank, a washing pump that pressurizes and circulates washing water, a heater that heats the washing water, and the washing water. An arm nozzle rotatably supported by a nozzle bearing communicating with a discharge port of the cleaning pump, and a plurality of nozzles rotatably provided on the arm nozzle. The nozzle is rotated by the cleaning water flowing in the arm nozzle and has an injection hole for blowing the cleaning water toward the tableware. The nozzle is rotated by a reaction of the cleaning water discharged from the ejection hole. Since nozzles that rotate while spouting cleaning water toward the tableware are provided, the cleaning water is evenly sprayed on the tableware, a high level of uniform cleaning power is obtained, and a good balance is achieved. It is possible to provide a dishwasher having an arm nozzle arrangement. Further, by improving the cleaning efficiency due to the uniform cleaning performance of the arm nozzle, it is possible to reduce the size of the cleaning pump and reduce the cleaning noise, and to provide a dishwasher that is inexpensive in terms of cost.

  In the second invention, in particular, the nozzle of the first invention is provided in the arm nozzle so as to be rotatable substantially horizontally, and the washing water blown out from the nozzle is sprayed uniformly over the entire area of the tableware. Good cleaning efficiency.

  In the third invention, in particular, the nozzle of the first or second invention is provided with a substantially U-shaped wall, and the nozzle rotates by receiving the wash water pumped into the arm nozzle by the wall. Because the wall that receives the cleaning water has a substantially square shape, the cleaning water can be received reliably, the rotation of the nozzle on the arm nozzle is smooth, and the cleaning efficiency is good. .

  In the fourth aspect of the invention, in particular, the nozzle of the first or second aspect is provided with a substantially rectangular wall, and the nozzle is rotated by receiving the washing water pumped into the arm nozzle by the wall. Thus, the mold configuration of the nozzle is simplified, and the rotational torque when the nozzle rotates upon receiving cleaning water increases, so that the nozzle can be reliably rotated.

  Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view showing a schematic configuration of the dishwasher according to the first embodiment of the present invention, FIG. 2 is a horizontal sectional view of a washing nozzle of the dishwasher, and FIG. 3 is the dishwasher. It is a cross-sectional view of the cleaning nozzle.

  As shown in FIG. 1, the dishwasher includes a washing tub 1, a tableware basket 2 that houses the tableware 2a and is disposed in the washing tub 1, a washing pump 3 that pressurizes and circulates washing water, and washing water. And a cleaning nozzle 6 having a plurality of ejection holes 5 for injecting cleaning water, and the tableware 2a is cleaned by the cleaning nozzle 6 upon receiving the injection of cleaning water.

  Reference numeral 7 denotes a control device that controls a series of operations of a dishwasher for water supply, washing, rinsing, draining and drying. The cleaning nozzle 6 is curved or bent in a direction delayed with respect to the rotation direction during operation, and is rotatably supported by a nozzle bearing 9 communicating with the discharge port 8 of the cleaning pump 3 to rotate substantially horizontally. An arm nozzle 10 that rotates, and a nozzle 11 that is configured separately from the arm nozzle 10 that rotates substantially horizontally by the flow of cleaning water pressurized by the cleaning pump 3 on the arm nozzle 10. The nozzle 10 is provided with an ejection hole 5 configured to be integrated with the arm nozzle 10 and ejecting at least one cleaning water, and a guide 12 that guides the cleaning water to the nozzle 11. The nozzle 11 separately supplies the cleaning water. As shown in FIG. 2, a plurality of jet holes 13 for jetting and a substantially U-shaped wall 14 for receiving the wash water pumped through the arm nozzle 10 are provided at the lower portion. In the nozzle 11 is configured to rotate in a substantially horizontal by the flow of pressurized washing water by washing pump 3.

  About the dishwasher comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the tableware 2a is stored in the tableware basket 2, mounted in a predetermined position of the cleaning tank 1, and the operation is started, a water supply step of supplying a predetermined amount of cleaning water to the cleaning tank 1 according to a predetermined sequence is performed. Subsequently, the cleaning pump 3 pressurizes the cleaning water, and the cleaning water is pumped to the arm nozzle 10 provided rotatably through the discharge port 8, and at least one cleaning water configured integrally with the arm nozzle 10 is ejected. It is ejected from the ejecting hole 5.

  At this time, the ejection washing water from at least one of the ejection holes 5 is ejected obliquely upward in a substantially tangential direction of the rotation locus. Due to the horizontal component of the jet reaction force generated at this time, the arm nozzle 10 rotates clockwise about the rotation axis O 1, and the washing water is jetted onto the tableware 2 a above the rotation trajectory of the jet hole 5. At the same time, the washing water hits the substantially square-shaped wall 14 provided at the lower part of the nozzle 11 by the guide 12 provided on the arm nozzle 10 via the arm nozzle 10, and the nozzle 11 itself is rotated by the rotation axis O2. Revolve around.

  Accordingly, the spray holes 13 provided in the nozzle 11 constantly spray the cleaning water while changing the spraying direction of the cleaning water to clean the tableware 2a above the nozzle 11. That is, the main washing process is executed. When the main washing process for a predetermined time is completed, a draining process for discharging washing water containing dirt washed away from the tableware 2a and the like to the outside is executed.

  Subsequent to this drainage process, the water supply process for supplying new washing water, the main washing process, and washing water for rinsing dishes that are contaminated with detergent and leftovers (soils attached to the dishes 2a are also called leftovers). The rinsing process ejected from the cleaning nozzle 6 and the draining process are continued, and these are repeated several times to complete the cleaning process.

  As described above, the basic operation of the cleaning process is the same as that of a conventional dishwasher.

  As mentioned above, according to the dishwasher in this Embodiment, the washing pump which accommodates the washing tank 1, the tableware 2a, is arrange | positioned in the washing tank 1, and pressurizes and circulates the tableware basket 2 and washing water. 3, a heater 4 for heating the cleaning water, and a cleaning nozzle 6 having a plurality of ejection holes 5 for injecting the cleaning water, and the cleaning nozzle 6 is curved in a direction delayed with respect to the rotational direction during operation. An arm nozzle 10 that is bent and is supported by a nozzle bearing 9 communicating with the discharge port 8 of the cleaning pump 3 and rotates substantially horizontally, and the flow of cleaning water pressurized by the cleaning pump on the arm nozzle 10 Is provided with a nozzle 11 configured separately from the arm nozzle 10 so as to be rotatable substantially horizontally, and the arm nozzle 10 ejects at least one washing water configured integrally with the arm nozzle 10. 5 and a guide 12 for guiding the cleaning water to the nozzle 11, the nozzle 11 being separately provided with a plurality of injection holes 13 for jetting the cleaning water, and the arm nozzle 10 being pumped to the lower part in the pipe line A substantially U-shaped wall 14 for receiving cleaning water is provided, and the nozzle 11 is configured to be rotatable substantially horizontally on the arm nozzle 10 by the flow of cleaning water pressurized by the cleaning pump 3. By this, the injection holes 13 provided in the nozzle 11 can always wash out the washing water while changing the jet direction of the washing water, and the tableware 2a above the nozzle 11 can be washed. Therefore, it is possible to provide a dishwasher that can obtain a uniform cleaning power and has a well-balanced arm nozzle configuration.

  Further, in the present embodiment, a configuration in which a substantially square-shaped wall 14 that receives the wash water pumped through the arm nozzle 10 is provided below the nozzle 11 is provided. 11 is rotatable substantially horizontally by the flow of the cleaning water pressurized by the cleaning pump 3, and the injection holes 13 provided in the nozzle 11 constantly eject the cleaning water while changing the injection direction of the cleaning water. Any shape other than the example described in the present embodiment may be used as long as the wall 14 can clean the upper tableware 2a.

  In addition, the cleaning nozzle 6 is curved or bent in a direction delayed with respect to the rotation direction during operation, but may have a shape other than the present embodiment.

  The cleaning nozzle 6 is curved or bent in a direction delayed with respect to the rotational direction during operation, and is supported by a nozzle bearing 9 communicating with the discharge port 8 of the cleaning pump 3 and rotates substantially horizontally. However, the nozzle 11 is rotatably provided in a cleaning nozzle that is fixed to the cleaning tank 1 and does not rotate, and a substantially U-shaped wall that receives the cleaning water pumped through the arm nozzle below the nozzle 11. The structure which provides may be sufficient.

(Embodiment 2)
FIG. 4 is a plan view of the nozzle of the washing nozzle of the dishwasher according to the second embodiment of the present invention, and FIG. 5 is a side view of the nozzle. Note that the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, as shown in FIG. 4, a substantially rectangular wall 14 that receives the wash water pumped through the arm nozzle 10 is provided on the outer periphery of the lower portion of the nozzle 11, and the nozzle 11 is placed on the arm nozzle 10. Is rotated approximately horizontally by the flow of cleaning water pressurized by the cleaning pump 3.

  With the above configuration, the cleaning pump 3 pressurizes the cleaning water, and the cleaning water is pumped to the arm nozzle 10 provided rotatably through the discharge port 8, and at least one cleaning water configured integrally with the arm nozzle 10. It is ejected from the ejection hole 5 which ejects. At this time, the ejection washing water from at least one of the ejection holes 5 is ejected obliquely upward in a substantially tangential direction of the rotation locus. The arm nozzle 10 rotates clockwise around the rotation axis O <b> 1 by the horizontal component of the injection reaction force generated at this time, and the washing water is ejected to the tableware 2 a above the rotation locus of the ejection hole 5. At the same time, the cleaning water hits a substantially rectangular wall 14 provided at the lower part of the nozzle 11 by the guide 12 provided on the arm nozzle 10 via the arm nozzle 10 and the nozzle 11 itself revolves around the rotation axis O2. . Accordingly, the spray holes 13 provided in the nozzle 11 constantly spray the cleaning water while changing the spraying direction of the cleaning water to clean the tableware 2a above the nozzle 11.

  As described above, according to the dishwasher of the present embodiment, the wall 14 provided at the lower portion of the nozzle 11 and receiving the washing water pumped through the arm nozzle 10 has a substantially rectangular shape. In addition, the mold configuration of the nozzle 11 is simplified, and the rotational torque when the nozzle 11 rotates upon receiving the washing water increases, so that the nozzle 11 can be reliably rotated.

  As described above, the dishwasher according to the present invention can wash the dishes above the nozzles by ejecting the washing water while the injection holes provided in the nozzles always change the spraying direction of the washing water. Therefore, it is possible to obtain a high level and uniform cleaning power for dishes, and to have a well-balanced arm nozzle configuration, which can be widely applied to dishwashers for cleaning dishes by jetting washing water.

The longitudinal cross-sectional view which shows schematic structure of the dishwasher in Embodiment 1 of this invention Horizontal sectional view of the washing nozzle of the dishwasher Cross-sectional view of the washing nozzle of the dishwasher The top view of the nozzle of the washing nozzle of the dishwasher in Embodiment 2 of this invention Side view of the nozzle A longitudinal sectional view showing a schematic configuration of a conventional dishwasher Top view of the washing nozzle of the dishwasher Explanatory drawing showing the operation of the cleaning nozzle

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing tank 2 Tableware basket 3 Washing pump 4 Heater 5 Ejection hole 6 Washing nozzle 8 Ejection port 9 Nozzle bearing 10 Arm nozzle 11 Nozzle 13 Injection hole 14 Wall

Claims (4)

A washing tank, a tableware container for storing tableware and a tableware arranged in the washing tank, a washing pump for pressurizing and circulating washing water, a heater for heating the washing water, and a plurality of jets for injecting the washing water An arm nozzle having an ejection hole and rotatably supported by a nozzle bearing communicating with the discharge port of the cleaning pump; and a plurality of nozzles rotatably provided on the arm nozzle, A dishwasher having an injection hole that rotates with the washing water flowing into the arm nozzle and blows out the washing water toward the tableware. The dishwasher of Claim 1 which provided the nozzle in the arm nozzle so that it could rotate substantially horizontally. The dishwasher according to claim 1 or 2, wherein a substantially U-shaped wall is provided on the nozzle, and the nozzle rotates by receiving washing water pumped into the arm nozzle by the wall. The dishwasher according to claim 1 or 2, wherein the nozzle is provided with a substantially rectangular wall, and the nozzle is rotated by receiving washing water pumped into the arm nozzle by the wall.

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