JP2008220497A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher capable of slimming down a washing nozzle holder part and simplifying the cleaning of the washing nozzle. <P>SOLUTION: A guide face 35 for guiding washing water to a nozzle part 29 is formed in a nozzle nut 19 detachably attached to the holder part 27 of the washing nozzle 17. Accordingly, it is not necessary to house a guide member inside the holder part 27, and therefore, the washing nozzle 17 can be slimmed. Further, since an upper central opening S2 of the holder part 27 is exposed when the nozzle nut 19 is detached from the holder part 27, the internal space of the holder part 27 of the washing nozzle 17 can be easily cleaned via the upper central opening S2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dishwasher including a cleaning nozzle rotatably supported by a nozzle header.

  Patent Document 1 discloses a dishwasher that cleans dishes with washing water sprayed from a washing nozzle. The dishwasher includes two upper and lower nozzle headers fixed to the ceiling and floor of the washing room, and the washing nozzles are rotatably supported by the nozzle headers. The cleaning nozzle has a nozzle holder portion attached to the nozzle header, and nozzle portions extending radially from the nozzle holder portion. A guide member that guides cleaning water to the nozzle portion is accommodated in the nozzle holder portion.

JP-A-4-314414

  However, in the conventional dishwasher, since the guide member is accommodated in the nozzle holder part, it is difficult to make the nozzle holder part thin and it is difficult to widen the space in the washing chamber. Furthermore, dust or the like is easily clogged in the nozzle holder portion by the guide member, and the guide member becomes an obstacle and cleaning is not easy.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a dishwasher that enables the nozzle holder portion to be thinned and simplifies cleaning of the washing nozzle.

  The present invention includes a nozzle header provided in a cleaning chamber, and a cleaning nozzle rotatably supported by the nozzle header. The cleaning nozzle is a holder portion attached to the nozzle header, and the cleaning supplied through the holder portion. In a dishwasher having a nozzle for spraying water, the table includes a nozzle nut that is detachably attached to the holder so as to close an opening formed in the holder, and the nozzle nut has an internal space in the holder. A guide surface for guiding the cleaning water supplied into the holder portion toward the nozzle portion is formed on the surface facing the surface.

  In this dishwasher, a guide surface for guiding cleaning water is formed on a nozzle nut that is detachably attached to the holder portion. Therefore, it is not necessary to house the guide member in the holder portion, and the cleaning nozzle can be thinned. Further, when the nozzle nut is removed from the holder portion, the opening of the holder portion is exposed, so that the internal space of the holder portion of the cleaning nozzle can be easily cleaned through the opening.

  Further, the nozzle nut is provided with an annular sliding contact surface that is in sliding contact with the edge forming the opening of the holder portion on the outer side from the guide surface, and the nozzle nut surrounds the sliding contact surface from the outside, It is preferable to have an annular protrusion that protrudes toward the surface. Since the cleaning nozzle rotates while the edge of the opening of the holder portion is in contact with the sliding contact surface of the nozzle nut, the cleaning water may leak from the gap between the sliding contact surface and the opening edge of the holder portion. This leakage can be reduced by the protrusion of the nozzle nut.

  According to the dishwasher according to the present invention, it is possible to reduce the thickness of the holder portion of the cleaning nozzle and simplify the cleaning of the cleaning nozzle.

  Hereinafter, a preferred embodiment of a dishwasher according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the tableware washing machine 1 is an undercounter type washing machine in which a door 5 is provided in front of the washing room 3. The dishwasher 1 is partitioned into a washing room 3 in which a rack in which dishes are set is accommodated, and a machine room 7 in which a washing liquid tank, a washing liquid pump, a booster, and the like are provided.

  A lower piping unit 4 (see FIG. 2) is fixed to the bottom 3 a of the cleaning chamber 3, and a lower nozzle unit 9 is attached to the lower piping unit 4. An upper piping unit 6 (see FIG. 5) is fixed to the ceiling of the cleaning chamber 3, and an upper nozzle unit 11 is attached to the upper piping unit 6. First, the lower piping unit 4 and the lower nozzle unit 9 will be described.

  As shown in FIGS. 2 to 4, the lower piping unit 4 includes a lower supply pipe 13 that supplies cleaning water and rinsing water, and a nozzle header 15 connected to the lower supply pipe 13. The lower nozzle unit 9 is attached to the cleaning nozzle 17 rotatably attached to the nozzle header 15, a nozzle nut 19 attached to the nozzle header 15 so as to sandwich the cleaning nozzle 17, and rotatably attached to the nozzle nut 19. The rinse nozzle 21 is provided.

  The lower supply pipe 13 is a double pipe (see FIG. 4) including an inner pipe 23 that supplies rinsing water and an outer pipe 25 that supplies cleaning water. The lower supply pipe 13 is laid along the bottom 3a of the cleaning chamber 3, and is erected at the center of the bottom 3a.

  The nozzle header 15 has an annular pedestal portion 15 a, and the nozzle header 15 is fitted into the upper end of the outer tube 25 via an O-ring 16. An annular shaft portion 15b for rotatably supporting the cleaning nozzle 17 is provided on the pedestal portion 15a.

  The inner pipe 23 of the lower supply pipe 13 passes through the central hole of the nozzle header 15 and protrudes upward from the shaft portion 15b. At the upper end of the inner tube 23, a support shaft portion 23a in which a male screw is formed is provided.

  The cleaning nozzle 17 includes a donut-shaped holder portion 27 that is rotatably supported by the nozzle header 15, and a plurality of nozzle portions 29 that extend radially from the holder portion 27. The nozzle portion 29 is formed with a plurality of injection ports 29a for injecting cleaning water. A circular lower central port S1 is formed in the lower part of the holder portion 27, and a circular upper central port (opening) S2 is formed in the upper part. An annular collar member 27a is secured to the edge forming the lower central port S1, and a similar collar member 27b is also fixed to the edge portion forming the upper central port S2. . The lower central port S1 is slidably fitted into the shaft portion 15b of the pedestal portion 15a via the collar member 27a. On the other hand, a nozzle nut 19 is attached to the upper central port S2.

  The nozzle nut 19 includes a nut portion 30 inserted into the upper central port S2 so as to close the upper central port S2, and an annular lid portion 31 protruding outward from the upper portion of the nut portion 30. When the nut portion 30 of the nozzle nut 19 is screwed into the support shaft portion 23a, the cleaning nozzle 17 is rotatably sandwiched between the lid portion 31 and the base portion 15a.

  A flanged shaft tube 33 provided in the rinsing nozzle 21 is inserted into the support shaft portion 23a. A central hole H1 concentric with the screw hole of the nut portion 30 is formed in the lid portion 31, and a flanged shaft tube 33 is inserted into the central hole H1. The flange 33a of the shaft tube 33 is sandwiched and fixed between an end surface forming a part of the central hole H1 in the lid portion 31 and an end surface of the support shaft portion 23a. The shaft tube 33 serves as a support shaft that rotatably supports the rinse nozzle 21.

  The lower end of the nut portion 30 is exposed so as to face the internal space of the nozzle header 15, and an annular guide surface 35 curved in a concave shape is formed on the surface of the lower end. The guide surface 35 guides the cleaning water supplied through the outer tube 25 and the nozzle header 15 toward the nozzle portion 29 in the lateral direction. The cleaning water introduced into the nozzle part 29 by the guide surface 35 is jetted from the jet port 29 a of the nozzle part 29. The cleaning nozzle 17 that has obtained a propulsive force by spraying the cleaning water rotates. In the lower nozzle unit 9, since the nozzle nut 19 receives the water pressure when changing the direction of the washing water toward the nozzle portion 29, the washing nozzle 17 does not receive the water pressure when changing the direction of the washing water. The rotation of the cleaning nozzle 17 becomes smooth.

  On the outer edge of the guide surface 35, a convex portion 37 is formed that is sharp at an acute angle and slightly protrudes downward. The slope inside the convex portion 37 faces the center side of the holder portion 27 and is continuously connected to the guide surface 35. The wash water guided by the guide surface 35 is restricted by the convex portion 37 from flowing upward. Therefore, it is difficult for the cleaning water to enter the gap between the collar member 27 b and the nut portion 30. As a result, the convex portion 37 reduces the leakage of cleaning water from the gap between the collar member 27 b and the nut portion 30. Furthermore, since the guide surface 35 and the convex portion 37 are continuously connected, the convex portion 37 is unlikely to hinder the flow of cleaning water toward the nozzle portion 29.

  On the back surface of the lid portion 31, an annular sliding contact surface 31 a is formed which is in sliding contact with a collar member (edge portion) 27 b fixed to the edge forming the upper central port S <b> 2 of the cleaning nozzle 17. Furthermore, an annular protrusion 31 b is provided on the back surface of the lid portion 31 so as to surround the sliding contact surface 31 a from the outside and protrude toward the holder portion 27. This protrusion 31b serves as a weir of cleaning water that leaks from between the sliding contact surface 31a and the collar member 27b, and reduces the leakage of cleaning water from the gap between the sliding contact surface 31a and the collar member 27b. Furthermore, even if the cleaning water slightly leaks from under the protrusion 31b, the cleaning water is unlikely to interfere with the cleaning water sprayed from the nozzle portion 29, so that it is difficult to reduce the cleaning effect.

  The upper portion of the shaft tube 33 assembled to the nozzle nut 19 protrudes upward from the nozzle nut 19, and the rinse nozzle 21 is rotatably attached. The upper end of the shaft tube 33 is screwed with a threaded cap 39 that holds the rinse nozzle 21 between the upper surface of the nozzle nut 19 and rotatably supports it. The shaft tube 33 is formed with a plurality of supply ports 33 b communicating with the inside of the rinsing nozzle 21. The rinsing water is supplied to the rinsing nozzle 21 through the inner tube 23, the shaft tube 33, and the supply port 33b of the lower supply tube 13. The rinse water is ejected from the ejection port 21 a of the rinse nozzle 21.

  Next, the upper piping unit 6 and the upper nozzle unit 11 will be described with reference to FIGS. 5 and 6. The upper piping unit 6 includes an upper supply pipe 41 that supplies cleaning water and rinsing water, and a nozzle header 42 connected to the upper supply pipe 41. Further, the upper nozzle unit 11 is rotatably attached to the cleaning nozzle 45 attached to the nozzle header 42, the nozzle nut 47 attached to the nozzle header 42 so as to sandwich the cleaning nozzle 45, and the nozzle nut 47. And a rinse nozzle 49 provided.

  The upper supply pipe 41 is a double pipe like the lower supply pipe 13 and is laid along the ceiling of the cleaning chamber 3. Note that the outer pipe 41b of the upper supply pipe 41 has a flat and substantially elliptical shape in order to suppress the vertical dimension.

  The nozzle header 42 has a pedestal portion 43, and the pedestal portion 43 has an inner cylinder portion 43b connected to the inner tube 41a of the upper supply pipe 41 and an outer cylinder portion 43c connected to the outer tube 41b. An annular shaft portion 43d for rotatably supporting the cleaning nozzle 45 is provided at the lower portion of the outer cylinder portion 43c. The inner cylinder portion 43b extends along the shaft portion 43d, and a female screw portion 43f is formed at the lower portion.

  The cleaning nozzle 45 includes a donut-shaped holder portion 51 that is rotatably supported by the nozzle header 42, and a plurality of nozzle portions 53 that extend radially from the holder portion 51. A circular upper central port S3 is formed in the upper part of the holder 51, and a circular lower central port (opening) S4 is formed in the lower part. An annular collar member 51a for securing a sealing property is fixed to the edge that forms the upper central port S3, and a similar collar member 51b is also fixed to the edge portion that forms the lower central port S4. . The upper central port S3 is slidably fitted into the shaft portion 43d via the collar member 51a. On the other hand, a nozzle nut 47 is attached to the lower central port S4.

  The nozzle nut 47 includes a male screw portion 55 that is screwed into the female screw portion 43f of the inner cylinder portion 43b, a circular insertion portion 57 that is inserted into the lower central port S4 so as to close the lower central port S4, and a male screw portion 55. And a guide portion 59 provided between the insertion portion 57 and a lid portion 61 projecting outward from the lower portion of the insertion portion 57. In the nozzle nut 47, the male screw portion 55 is screwed into the female screw portion 43f of the inner cylinder portion 43b, so that the cleaning nozzle 45 is rotatably sandwiched between the lid portion 61 and the pedestal portion 43.

  The nozzle nut 47 is formed with a central hole H2, and a flanged shaft tube 63 provided in the rinsing nozzle 49 is inserted into the central hole H2. An insertion hole H3 is formed in the inner threaded portion 43f of the inner cylinder portion 43b, and a flanged shaft tube 63 is inserted into the insertion hole H3. The flange 63a of the shaft tube 63 is sandwiched and fixed between an end surface forming a part of the insertion hole H3 and an end surface of the male screw portion 55 in the inner cylinder portion 43b. The shaft tube 63 serves as a support shaft that rotatably supports the rinse nozzle 49.

  The guide part 59 of the nozzle nut 47 has a peripheral surface facing the internal space of the nozzle header 42, and a guide surface 65 curved in a concave shape is formed on the peripheral surface. The guide surface 65 guides the cleaning water supplied through the outer tube 41 b and the nozzle header 42 toward the nozzle portion 53 in the lateral direction. The cleaning water introduced into the nozzle portion 53 by the guide surface 65 is jetted from the jet port 53 a of the nozzle portion 53. The cleaning nozzle 45 that has obtained a driving force by the injection of cleaning water rotates. In the upper nozzle unit 11, the nozzle nut 47 receives the water pressure when changing the direction of the cleaning water toward the nozzle portion 53, so that no water pressure is applied to the cleaning nozzle 45 when changing the direction of the cleaning water. The rotation of the cleaning nozzle 45 becomes smooth.

  The lid portion 61 has an outer edge portion 61a (see FIG. 7) formed in a wave shape. The lid 61 is easily gripped by the outer edge 61a, and the nozzle nut 47 is easily removed from the nozzle header 42.

  A lower portion of the shaft tube 63 assembled to the nozzle nut 47 protrudes downward from the nozzle nut 47, and a rinse nozzle 49 is rotatably attached. A threaded cap 67 is screwed to the lower end of the shaft tube 63 so that the rinse nozzle 49 is sandwiched between the lower surface of the nozzle nut 47 and slidably supported. A plurality of supply ports 63 b communicating with the inside of the rinse nozzle 49 are formed in the shaft tube 63. The rinsing water is supplied to the rinsing nozzle 49 through the inner pipe 41a, the shaft pipe 63, and the supply port 63b of the upper supply pipe 41. The rinse water is ejected from the ejection port 49 a of the rinse nozzle 49.

  Next, a description will be given of a work procedure when the lower nozzle unit 9 or the upper nozzle unit 11 is detached from the lower piping unit 4 or the upper piping unit 6 and disassembled, and dust and the like clogged inside are cleaned.

  When removing the cleaning nozzle 17 of the lower nozzle unit 9 from the nozzle header 15, the lid portion 31 of the nozzle nut 19 is grasped by hand, and the lid portion 31 is rotated and loosened. Then, the nozzle nut 19 is easily detached from the support shaft portion 23a. Further, when the nozzle nut 19 is removed from the support shaft portion 23a, the cleaning nozzle 17 is also easily detached from the nozzle header 15. Therefore, the lower nozzle unit 9 can be easily detached from the lower piping unit 4 and can be further easily disassembled.

  When the cleaning nozzle 17 is removed from the nozzle nut 19 and the nozzle header 15, the upper central port S2 and the lower central port S1 are exposed, and the inside of the cleaning nozzle 17 can be easily cleaned via the upper central port S2 and the lower central port S1. . Further, a guide surface 35 is formed on the back side of the nozzle nut 19, and the guide surface 35 can be easily cleaned. Although the rinsing nozzle 21 is assembled to the nozzle nut 19, it can be easily disassembled by removing the threaded cap 39, and the rinsing nozzle 21 can be easily washed.

  When removing the cleaning nozzle 45 of the upper nozzle unit 11 from the nozzle header 42, the lid 61 of the nozzle nut 47 is grasped by hand, and the lid 61 is rotated and loosened. The lid 61 has a wavy outer edge 61a, so that the lid 61 is easy to grip with a hand and is difficult to slide. When the lid portion 61 is rotated and loosened, the nozzle nut 47 is easily detached from the inner cylinder portion 43b. Further, when the nozzle nut 47 is removed from the inner cylinder portion 43b, the cleaning nozzle 45 is also easily detached from the nozzle header 42. Therefore, the upper nozzle unit 11 can be easily detached from the upper piping unit 6 and can be easily disassembled.

  When the cleaning nozzle 45 is removed from the nozzle nut 47 and the nozzle header 42, the upper central port S3 and the lower central port S4 are exposed, and the inside of the cleaning nozzle 45 can be easily cleaned via the upper central port S3 and the lower central port S4. . Moreover, since the guide surface 65 is provided in the nozzle nut 47, the guide surface 65 can also be easily cleaned by removing the nozzle nut 47. The rinsing nozzle 49 can also be easily disassembled by removing the threaded cap 67, and the rinsing nozzle 49 can be easily cleaned.

  In the tableware washing machine 1 described above, the washing water is supplied to the holder part 27 of the washing nozzle 17 of the lower nozzle unit 9, and the water pressure at the time of changing the direction of the washing water toward the nozzle part 29 is guided by the nozzle nut 19. It is intended to be received by the surface 35. As a result, no water pressure is applied to the cleaning nozzle 17 when changing the direction of the cleaning water, and the cleaning nozzle 17 rotates smoothly. The same applies to the upper nozzle unit 11, and the water pressure at the time of changing the direction of the cleaning water toward the nozzle portion 53 is received by the guide surface 65 of the nozzle nut 47. As a result, no water pressure is applied to the washing nozzle 45 when the direction of the washing water is changed, and the washing nozzle 45 rotates smoothly. Further, the number of parts is reduced as compared with the case where the guide member is accommodated in the cleaning nozzle 17 or the cleaning nozzle 45, and the structure is simplified, and the cleaning nozzle 17 or the cleaning nozzle 45 is less likely to be clogged with dust.

  Further, since the guide surface 35 is formed on the nozzle nut 19 that is detachably attached to the holder portion 27, and similarly, the guide surface 65 is formed on the nozzle nut 47 that is detachably attached to the holder portion 51, the cleaning nozzle The cleaning member 17 or the cleaning nozzle 45 can be made thinner because it is not necessary to house the guide member in the holder unit 27 of the cleaning nozzle 27 or the holder portion 51 of the cleaning nozzle 45. As a result, the area in the cleaning chamber 3 occupied by the cleaning nozzle 17 or the cleaning nozzle 45 can be reduced, and the space in which the dishes can be stored in the cleaning chamber 3 can be substantially easily expanded.

  Further, when the nozzle nut 19 is removed from the holder part 27, the upper central port S2 of the holder part 27 is exposed. Similarly, when the nozzle nut 47 is removed from the holder part 51, the lower central port S4 of the holder part 51 is exposed. As a result, the internal space can be easily cleaned via the upper central port S2 of the holder part 27 or the lower central port S4 of the holder part 51.

  Further, the nozzle nut 19 is provided with an annular sliding contact surface 31a that is in sliding contact with the collar member 27b of the holder portion 27 of the cleaning nozzle 17 outside the guide surface 35. The nozzle nut 19 has the sliding contact surface 31a from the outside. An annular protrusion 31 b is provided so as to surround and protrude toward the holder portion 27. There are some gaps between the sliding contact surface 31a of the nozzle nut 19 and the collar member 27b to allow the cleaning nozzle 17 to rotate smoothly. Since the leakage of the cleaning water from the gap is reduced by the protrusion 31b of the nozzle nut 19, it is possible to prevent the cleaning effect from being lowered due to the decrease in the amount of spray water, and the cleaning water from which the leaked cleaning water is jetted from the nozzle portion 29. It is possible to prevent a reduction in cleaning effect caused by interfering with.

  In the present embodiment, only the nozzle nut 19 of the lower nozzle unit 9 is provided with the annular protrusion 31b on the back surface of the lid portion 31 to reduce the leakage of cleaning water. The nut 47 may be provided.

It is a perspective view which shows embodiment of the dishwasher which concerns on this invention. It is the disassembled perspective view which looked at the lower nozzle unit from diagonally upward. It is the disassembled perspective view which looked at the lower nozzle unit from diagonally downward. It is sectional drawing of a lower nozzle unit. It is a perspective view of an upper nozzle unit. It is sectional drawing of an upper nozzle unit. It is sectional drawing which shows the nozzle head and nozzle nut of an upper nozzle unit.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Dishwasher, 3 ... Washing chamber, 15, 42 ... Nozzle header, 17, 45 ... Cleaning nozzle, 19, 47 ... Nozzle nut, 27, 51 ... Holder part, 27b ... Color member (edge part), 29, 53 ... Nozzle part, 31a ... Sliding contact surface, 31b ... Projection, 35, 65 ... Guide surface, S2 ... Upper central port (opening), S4 ... Lower central port (opening).

Claims (2)

A nozzle header provided in the cleaning chamber; and a cleaning nozzle rotatably supported by the nozzle header, wherein the cleaning nozzle is supplied through the holder portion attached to the nozzle header and the holder portion. In a dishwasher having a nozzle part for jetting washing water,
A nozzle nut detachably attached to the holder part so as to close the opening formed in the holder part;
The nozzle nut is provided with a guide surface on the surface facing the internal space of the holder part for guiding the cleaning water supplied into the holder part toward the nozzle part. washing machine.   The nozzle nut is provided with an annular sliding contact surface that is in sliding contact with an edge portion that forms the opening of the holder portion, outside the guide surface, and the nozzle nut surrounds the sliding contact surface from the outside. The dishwasher according to claim 1, further comprising an annular protrusion protruding toward the holder portion.

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