JPH0631647U - Dishwasher - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a dishwasher capable of uniformly washing the dishes contained therein when the washing tank has a rectangular cross section. [Structure] A main nozzle is provided in a discharge port of a cleaning pump provided at the bottom of a cleaning tank having a substantially rectangular cross section so as to be rotatable around the discharge port in communication with the discharge port. An injection port is provided at one end of the main nozzle, and a water supply port is provided at the other end, and a trifurcated sub-nozzle that communicates with this water supply port is rotatably provided around the water supply port, and at each end of this sub-nozzle. Has an injection port. When the main nozzle is at an angle of 45 degrees with respect to the long side of the cleaning tank, the injection ports at both ends of the sub-nozzle are arranged so as to come closest to the four corners of the diagonal in the cleaning tank. Offset on the short side of the cleaning tank. Therefore, the locus of movement of the injection port of the sub nozzle can pass through the four corners on the diagonal in the cleaning tank.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dishwasher that can automatically wash dishes by spraying washing water from a nozzle.

[0002]

[Prior art]

 Conventionally, as a dishwasher of this type, a main nozzle is rotatably provided around the above-mentioned discharge port in communication with the discharge port of a cleaning pump provided at the bottom of the cleaning tank, and the main nozzle is rotated about One end is provided with a first injection port, the other end is provided with a water supply port, and a sub-nozzle having a second injection port in communication with this water supply port is rotatable around the water supply port. It has been proposed that the rotation trajectory of the first injection port be set so as to pass through the annular range surrounded by the revolution trajectory of the rotation center of the main nozzle and the outer envelope of the rotation trajectory of the second injection port ( JP-A-4-67828). In this case, there is an advantage that the cleaning liquid can be uniformly sprayed onto the tableware inside the cleaning tank and the cleaning efficiency is improved. However, the above is effective only when the washing tank has a circular cross section, and when the washing tank is rectangular, there is a drawback that the washing liquid cannot be evenly sprayed to the tableware arranged at the four corners. there were.

[0003]

[Problems to be solved by the device]

 Therefore, an interlocking mechanism is provided between the nozzles so that the sub-nozzle rotates at twice the rotational speed of the main nozzle so that the movement trajectory of the second injection port passes through four diagonal corners in the cleaning tank. There has been proposed (JP-A-4-164429). In this case, even if the washing tank is square, the dishes arranged at the four corners can be washed efficiently.

However, in the case of the dishwasher described above, since the sub nozzle rotates at twice the rotation speed of the main nozzle and the sub nozzle has a straight shape, the second injection is performed when the washing tank has a square cross section. Although the locus of movement of the mouth can reach the four corners, in the case of a rectangular cross section, it cannot reach the four corners and the uniform cleaning effect cannot be exhibited. Especially in the sink, the space in the depth direction is often restricted, and therefore, a horizontally long rectangular dishwasher is demanded, and the conventional nozzle mechanism cannot sufficiently meet this demand. Therefore, an object of the present invention is to provide a dishwasher capable of uniformly washing the dishes contained therein when the washing tank has a rectangular cross section.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the first invention is a dishwasher having a washing tank having a substantially rectangular cross section, and a main nozzle is provided in communication with a discharge port of a washing pump provided at the bottom of the washing tank. In addition to being rotatable about the discharge port, a water supply port is provided on at least one end of the center of rotation of the main nozzle, and a secondary nozzle communicating with this water supply port is rotatable about the water supply port. The sub-nozzle is provided with a cleaning water injection port at its end, while the sub-nozzle is provided with an interlocking mechanism between the nozzles so that the sub-nozzle rotates in conjunction with the main nozzle. At an angle of 45 degrees with respect to the direction, the wash water injection port is offset to the short side of the washing tank with respect to the longitudinal direction of the main nozzle so as to come closest to the four corners of the washing tank. It is characterized by doing. The second invention is the cleaning water which comes closest to the four diagonal corners in the cleaning tank when the main nozzle is at an angle of 45 degrees with respect to the long side direction of the cleaning tank. In addition to the injection port, another cleaning water injection port is provided that comes closest to the short side of the cleaning tank when the main nozzle is parallel to the long side direction of the cleaning tank.

[0006]

[Action]

 In the first invention, when the main nozzle rotates, the sub nozzles connected by the interlocking mechanism also interlock. At this time, when the main nozzle is at an angle of 45 degrees with respect to the long side direction of the cleaning tank, the cleaning water injection port is offset to the short side of the cleaning tank with respect to the longitudinal direction of the main nozzle. While the nozzle makes one revolution, the cleaning water injection port of the sub-nozzle moves while drawing an elliptical locus in the diagonal direction of the cleaning tank. Therefore, the wash water injection port can surely reach the diagonally opposite four corners of the washing tank, and the dishes arranged at the four corners can be uniformly washed. Further, in the case of a rectangular cleaning tank, if the ratio of the long side to the short side becomes large, a blind spot for cleaning tends to occur near the center of the short side. According to the second invention, the sub-nozzle is provided with another cleaning water injection port that comes closest to the short side portion of the cleaning tank when the main nozzle is parallel to the long side direction of the cleaning tank. The locus of movement of the injection port is an elliptical locus having a long axis parallel to the long side of the cleaning tank. Therefore, the vicinity of the short side can be efficiently cleaned, and the blind spot of cleaning can be eliminated.

[0007]

【Example】

 FIG. 1 shows an example of a dishwasher according to the present invention. This dishwasher includes a washing tank 1 having a substantially rectangular cross section, and a dish basket 3 holding a dish 2 is accommodated inside the washing tank 1. A washing water storage portion 4 and a washing pump 5 are provided at the bottom of the washing tank 1, and the washing water dropped from the dishes 2 passes through the filter 6 and is stored in the storage portion 4. The cleaning water stored in the reservoir 4 is warmed by the heater 7, enters the cleaning pump 5 driven by the cleaning motor 8, and is discharged upward from the discharge port 9.

The ejection port 9 is provided with a nozzle mechanism shown in FIG. That is, on the bottom wall 1a of the cleaning tank 1, a support cylinder 10 forming a discharge port 9 is provided so as to project upward, and a main nozzle 11 having a hollow structure is rotatably attached to the support cylinder 10 and the main nozzle 11 The internal space of is communicated with the discharge port 9. A wash water injection port 12 that opens upward is formed at one end of the center of rotation of the main nozzle 11, and a water supply port 13 is formed at the other end. A hollow shaft 15 of a sub-nozzle 14 having a hollow structure is rotatably fitted in the water supply port 13, and the inner space of the sub-nozzle 14 communicates with the water supply port 13. As shown in FIG. 3, the sub-nozzle 14 is formed in a three-pronged shape, and washing water injection ports 16, 17, and 18 that open upward are formed at three end portions, respectively. As described above, a part of the cleaning water discharged from the discharge port 9 is sprayed from the cleaning water spray port 12 at one end of the main nozzle 11, and the rest is the clean water spray ports 16 and 17 of the sub nozzle 14. , 18 to wash the dishes 2 stored in the dish basket 3.

Of the above-mentioned cleaning water injection ports 16, 17, 18, the main nozzles 11 of the injection ports 16, 18 at both ends are at an angle of 45 degrees with respect to the long side direction of the cleaning tank 1, as shown by the solid line in FIG. It is provided at a position offset to the short side of the cleaning tank 1 with respect to the longitudinal direction of the main nozzle 11 so as to come closest to the four corners of the diagonal inside the cleaning tank 1 at an angle. Further, the central injection port 17 is provided at a position closest to the short side portion of the cleaning tank 1 when the main nozzle 11 is parallel to the long side direction of the cleaning tank 1 as shown by a dashed line in FIG. ing.

A main gear 21 is integrally fixed to the lower surface of the main nozzle 11 via a cylindrical shaft portion 20, and the main gear 21 and a drive gear 23 driven by a rotation motor 22. It is in mesh. Therefore, when the motor 22 is driven, the main nozzle 11 rotates in a fixed direction at a fixed speed. An interlocking mechanism 24 is provided on the lower surface side of the main nozzle 11 so that the sub nozzle 14 rotates at a speed twice the rotation speed of the main nozzle 11. That is, a fixed gear 25 is rotatably arranged on the outer periphery of the shaft portion 20 of the main nozzle 11, and the fixed gear 25 is connected to the bottom wall 1a of the cleaning tank 1 via a gear receiver 26. Therefore, the fixed gear 25 is non-rotatably supported. A support shaft 27 is projectingly provided on the lower surface of the main nozzle 11 and on the side of the water supply port 13, and an intermediate gear 28 meshing with the fixed gear 25 is rotatably mounted on the support shaft 27. These gears 25 and 28 are gears having the same number of teeth. The intermediate gear 28 meshes with a small gear 29 fixed to the lower end of the hollow shaft 15 of the sub nozzle 14, and the number of teeth of the small gear 29 is set to half the number of teeth of the intermediate gear 28. Therefore, when the main nozzle 11 rotates, the sub nozzle 14 rotates in the opposite direction to the main nozzle 11 at a double rotation speed.

Here, the operation of the interlocking mechanism 24 will be described. First, when the main nozzle 11 is rotated at a constant speed by the motor 22, the intermediate gear 28 rotates around it while meshing with the fixed gear 25, and the small gear 29 also rotates synchronously with the intermediate gear 28. Therefore, the sub nozzle 14 connected to the small gear 29 rotates in the opposite direction to the main nozzle 11. At this time, the injection ports 16, 17, and 18 of the sub nozzle 14 are located outside the water supply port 13 while the main nozzle 11 is moving on the short side of the cleaning tank 1, and the main nozzle 11 is in the cleaning tank 1. Since it is located inside the water supply port 13 while it is moving on the long side, the auxiliary nozzle 14 can move without interfering with the inner wall of the cleaning tank 1.

FIG. 4 shows the movement loci of the injection ports 12, 16, 17, and 18. As is clear from this locus, the ejection port 12 draws a circular locus 12A centering on the rotation center of the main nozzle 11, and the ejection ports 16 and 18 are elliptical loci 16A and 18 with the diagonal line of the cleaning tank 1 as the major axis. A is drawn, and the injection port 17 draws an elliptical locus 17A having a long axis parallel to the long side of the cleaning tank 1. Therefore, the injection ports 16 and 18 of the sub-nozzle 14 can surely reach the four corners of the cleaning tank 1, and the injection port 17 can be closest to the short sides of the cleaning tank 1. Can clean evenly every corner.

FIG. 5 shows a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, water supply ports 31 and 32 are provided at both ends of the main nozzle 30, and sub nozzles 33 and 34 are rotatably attached to these water supply ports, respectively. One of the sub-nozzles 33 is formed in a bifurcated shape, and wash water injection ports 35 and 36 are provided at the respective ends. Further, the other sub-nozzle 34 is formed in a linear shape, and wash water injection ports 37 and 38 are provided at the center of rotation (water supply port 32) and the tip end, respectively. An interlocking mechanism 40 is provided on the lower surface side of the main nozzle 30, and the interlocking mechanism is arranged at the center of rotation of the main nozzle 30 and fixed gear 41 fixed at a fixed position is engaged with the fixed gear 41. Two intermediate gears 42 and 43 rotatably attached to the lower surface side of the nozzle 30 and small gears 44 and 45 meshed with the intermediate gears 42 and 43 and fixed to the shaft portions of the auxiliary nozzles 33 and 34, respectively. It consists of and. The fixed gear 41 and the intermediate gears 42 and 43 are gears having the same diameter, and the small gears 44 and 45 are gears having half the number of teeth of the intermediate gears 42 and 43.

FIG. 6 shows the locus of movement of each of the injection ports 35, 36, 37, 38 in the second embodiment. Also in this case, as in the first embodiment, the injection ports 35, 38 draw elliptical loci 35A, 38A whose major axis is the diagonal line of the cleaning tank 1, and the injection port 37 is centered on the rotation center of the main nozzle 30. It can be seen that a circular locus 37A is drawn, and the injection port 36 draws an elliptical locus 36A whose major axis is the axis parallel to the long side of the cleaning tank 1. Therefore, since the loci of motion of the injection ports 35 and 38 pass through the four corners of the cleaning tank 1, and the injection port 36 passes near the short sides of the cleaning tank 1, the cleaning water is evenly distributed in the cleaning tank 1. Can be jetted.

The present invention is not limited to the above embodiment. For example, although the main nozzle 11 is rotated by the motor 22 in the above embodiment, the main nozzle 11 may be rotated by the jet reaction force of the wash water jetted from the jet port 12. However, when the main nozzle is rotated by the injection reaction force of the wash water, the injection pressure must be kept high, so that the noise caused by the collision of the wash water with the inner wall of the wash tank is large, and the injection port While it is necessary to make the direction diagonal, when the main nozzle is rotated by the motor, the injection pressure can be set arbitrarily, so noise can be reduced and the injection port is made oblique. Since it is not necessary and can be oriented in any direction, it is possible to improve the cleaning efficiency.

Although a plurality of gear pairs are used as the interlocking mechanism in the above embodiment, a wrapping transmission mechanism may be used instead. In this case, for example, a chain or toothed belt may be wound between the sprocket fixed to the rotation center of the main nozzle and the sprocket attached to the rotation shaft of the sub nozzle, or the motor may be rotated around the rotation center of the main nozzle. It is also possible to provide a sprocket driven by the sprocket, attach the sprocket to the rotary shaft of the auxiliary nozzle, and wrap a chain or a toothed belt between these sprockets.

[0017]

[Effect of device]

 As is clear from the above description, according to the first invention, when the main nozzle is at an angle of 45 degrees with respect to the long side direction of the cleaning tank, the cleaning water injection port of the sub nozzle is oriented in the longitudinal direction of the main nozzle. By changing the shape of the sub-nozzle so that it will be offset to the four corners of the cleaning tank, the above-mentioned cleaning water injection port was made to come closest to the four corners on the diagonal in the cleaning tank. Even in this cleaning tank, the cleaning water can be sprayed evenly on the four corners. According to the second invention, in addition to the effect of the first invention, another cleaning which comes closest to the short side portion of the cleaning tank when the main nozzle is parallel to the long side direction of the cleaning tank. Since the water injection port is provided on the sub-nozzle, the vicinity of the short side of the cleaning tank, which is likely to be a blind spot for cleaning, can be reliably cleaned by this injection port, and the entire area of the cleaning tank can be cleaned more evenly.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an internal structure of a dishwasher according to the present invention.

2 is a cross-sectional view of a nozzle portion of the dishwasher of FIG.

FIG. 3 is a plan view of a nozzle portion.

FIG. 4 is a plan view showing a motion locus of an injection port of a nozzle.

FIG. 5 is a plan view of a nozzle portion according to a second embodiment of the present invention.

FIG. 6 is a plan view showing a motion locus of an ejection port of a nozzle of a second embodiment.

[Explanation of symbols]

 1 Cleaning Tank 5 Cleaning Pump 9 Discharge Port 11 Main Nozzle 13 Water Supply Port 14 Sub Nozzle 16-18 Cleaning Water Jet Port 22 Rotation Motor 24 Interlocking Mechanism

Claims (2)

[Scope of utility model registration request] 1. A dishwasher provided with a washing tank having a substantially rectangular cross section, wherein the main nozzle is rotatable about the above-mentioned outlet in communication with the outlet of a washing pump provided at the bottom of the washing tank. The water supply port is provided at at least one end with respect to the center of rotation of the main nozzle, and a sub-nozzle communicating with this water supply port is rotatably provided around the water supply port, and at the end of this sub-nozzle. While the cleaning water injection port is provided, an interlocking mechanism is provided between the nozzles so that the sub-nozzle rotates in conjunction with the main nozzle, and when the main nozzle is at an angle of 45 degrees with respect to the long side direction of the cleaning tank, The dishwasher according to claim 1, wherein the washing water injection port is offset to the short side of the washing tank with respect to the longitudinal direction of the main nozzle so as to be closest to the diagonally opposite four corners of the washing tank. 2. The dishwasher according to claim 1, wherein the sub-nozzle is provided at diagonal four corners in the washing tank when the main nozzle is at an angle of 45 degrees with respect to the long side direction of the washing tank. In addition to the closest cleaning water injection port, another cleaning water injection port closest to the short side of the cleaning tank when the main nozzle is parallel to the long side direction of the cleaning tank is provided. And dishwasher.