JP7045618B2 - dishwasher - Google Patents

Description

The present invention relates to a dishwasher that uses washing water to wash dishes and the like.

The conventional dishwasher has a configuration as shown in FIGS. 13 to 15 (see, for example, Patent Document 1). Hereinafter, the configuration of the conventional dishwasher described in Patent Document 1 will be described with reference to FIGS. 13 to 15. FIG. 13 is a vertical sectional view of a main part of a conventional dishwasher. FIG. 14 is a perspective plan view in which a part of the washing nozzle of the conventional dishwasher is cut out. FIG. 15 is a perspective view of a valve body of a washing nozzle of a conventional dishwasher.

As shown in FIGS. 13 and 14, the dishwasher includes a dish basket 51, a washing tank 52, a washing pump 53, a washing nozzle 54, and the like. The tableware basket 51 stores tableware to be washed. A tableware basket 51 is placed inside the washing tank 52. The washing pump 53 pumps washing water. The cleaning nozzle 54 is arranged near the bottom surface of the cleaning tank 52. The washing nozzle 54, while rotating, sprays the pumped washing water toward the tableware.

The cleaning nozzle 54 includes an arm portion 55, a rotating shaft 56, and a tower nozzle 57. The arm portion 55 is provided in the horizontal direction and has a plurality of injection ports 54a and 54b on the upper surface thereof. The rotation shaft 56 is provided at the center of the lower surface of the arm portion 55. The tower nozzle 57 is provided on the upper surface at a position facing the rotating shaft 56, extends upward, and has an injection port at the tip.

The arm portion 55 and the tower nozzle 57 each have a plurality of flow paths leading to the injection port inside. The rotating shaft 56 includes a water diversion mechanism 58 inside. The water distribution mechanism 58 includes a valve body 59 and an engaging portion 60. The water distribution mechanism 58 distributes the washing water to a plurality of flow paths provided in the arm portion 55 and the tower nozzle 57. The valve body 59 moves in the vertical direction due to the pressure of the washing water. The engaging portion 60 rotates the valve body 59 by a predetermined angle as the valve body 59 moves up and down. As shown in FIG. 15, the valve body 59 is provided with two fan-shaped openings 59a and two closed portions 59b having a central angle of 90 degrees diagonally. That is, on the connecting surface between the arm portion 55 and the rotating shaft 56, the inlet portions 55a and 55b of a plurality of flow paths provided in a fan shape having a central angle of 90 degrees are distributed and arranged in four.

As described above, the conventional dishwasher is configured and operates as follows.

First, the dishwasher sucks the washing water through the washing pump 53 and injects it from the washing nozzle 54. Tableware is washed with the sprayed washing water. After that, the washing water is sucked in again by the washing pump 53 and ejected from the washing nozzle 54. That is, the tableware and the like are washed by the above circulation operation. At this time, the washing water pressure-fed by the washing pump 53 flows into the rotating shaft 56, and the water dividing mechanism 58 is operated as follows.

Specifically, first, the valve body 59 rises due to the water pressure of the washing water flowing into the water diversion mechanism 58 from below. In the raised valve body 59, the opening portion 59a and the closing portion 59b coincide with each other of the two inlet portions 55a and 55b located diagonally among the four inlet portions. As a result, the washing water flows into the two flow paths in the arm portion 55 from the two inlet portions 55a corresponding to the opening portion 59a of the valve body 59, as shown by the solid line arrow A in FIG.

Next, the washing water flowing into the arm portion 55 is injected from the injection port 54a provided in each flow path of the arm portion 55, as shown by the solid line arrow B in FIG. At this time, the arm portion 55 rotates due to the reaction force of the washing water injected from the injection port 54a. Then, the tableware in the tableware basket 51 is washed by the sprayed washing water. At this time, the water diversion mechanism 58 in the rotation shaft 56 also rotates in synchronization with the rotation of the arm portion 55.

When the cleaning pump 53 is driven for a predetermined time, it is temporarily stopped. As a result, the valve body 59 is not subjected to the water pressure of the washing water, so that it descends along the rotation shaft 56 and comes into contact with the engaging portion 60. Then, the valve body 59 rotates 90 degrees along the inclination of the engaging portion 60.

Next, when the cleaning pump 53 is driven again, the valve body 59 rises due to water pressure. In the raised valve body 59, the opening portion 59a and the closing portion 59b coincide with each other so as to be different from the previous time by 90 degrees with respect to the plurality of inlet portions 55a and 55b. As a result, the washing water flows from the two inlet portions 55b into the two flow paths in the arm portion 55 as shown by the broken line arrow C in FIG. 14, and is injected from the injection port 54b as shown by the broken line arrow D. Will be done.

That is, in the conventional dishwasher, the water diversion mechanism itself rotates in synchronization with the rotation of the washing nozzle. Then, the flow path in the cleaning nozzle through which the cleaning water flows is switched. As a result, the washing water is sprayed over a wide range from the washing nozzle and the tower nozzle while saving water. As a result, the tableware is washed evenly by the washing water sprayed while rotating.

However, in a conventional dishwasher, the water diversion mechanism is arranged in a rotating shaft located below the washing nozzle. Therefore, the diameter and the vertical dimension of the rotating shaft become large. Further, it is necessary to increase the size of the bearing portion fitted with the rotating shaft in accordance with the size of the rotating shaft.

Normally, the bearing portion of the dishwasher is provided at the bottom of the washing tank. As a result, the vertical dimension becomes large at the bottom of the cleaning tank, so that the cleaning nozzle is arranged at a position higher than the conventional position. Therefore, the tableware basket is also arranged at a high position, and the storage space for tableware in the washing tank is reduced, so that the amount of items to be washed is reduced. In addition, the maximum size of tableware that can be accommodated is reduced (limited).

Japanese Unexamined Patent Publication No. 2010-194138

The present invention provides a dishwasher in which a water diversion mechanism is arranged above the axis of rotation to allow the storage of a large number of dishes, save water, and reliably wash the dishes.

The dishwasher of the present invention has a dishwasher on which an object to be washed is placed, a washing tank in which the dishwasher is housed, a washing pump for pumping washing water, and a washing that is rotatably supported and sprays washing water. Equipped with a nozzle. The cleaning nozzle has a rotation shaft, a plurality of flow paths having injection ports, and a water diversion mechanism for switching the supply of cleaning water to the plurality of flow paths. The water diversion mechanism is configured to be arranged above the axis of rotation.

According to this configuration, it is not necessary to increase the rotation axis of the cleaning nozzle in the vertical direction. Similarly, the bearing portion fitted to the rotating shaft does not need to be large. Therefore, it is not necessary to arrange the tableware basket provided in the washing tank at a high position. As a result, the amount of items to be washed such as tableware stored in the tableware basket can be increased. As a result, more objects to be washed can be stored in the tableware basket, and the tableware can be reliably washed while saving water.

FIG. 1 is a view showing a side cross section of a dishwasher according to the first embodiment of the present invention. FIG. 2 is a plan view of the washing nozzle of the dishwasher in the same embodiment. FIG. 3 is a side sectional view of the washing nozzle of the dishwasher in the same embodiment. FIG. 4 is a perspective sectional view of a main part of the washing nozzle of the dishwasher in the same embodiment. FIG. 5 is a perspective view of a main part of the washing nozzle of the dishwasher in the same embodiment. FIG. 6 is a perspective view of the valve body of the washing nozzle of the dishwasher in the same embodiment. FIG. 7 is a side view of the valve body of the dishwasher in the same embodiment. FIG. 8 is a top view of the valve body of the dishwasher in the same embodiment. FIG. 9 is a bottom view of the valve body of the dishwasher in the same embodiment. FIG. 10 is a side sectional view of the vicinity of the valve body of the dishwasher in the same embodiment. FIG. 11 is a view showing a front cross section of the dishwasher according to the second embodiment of the present invention. FIG. 12 is a view showing a front cross section of the dishwasher in the same embodiment. FIG. 13 is a vertical sectional view of a main part of a conventional dishwasher. FIG. 14 is a perspective plan view in which a part of the washing nozzle of the conventional dishwasher is cut out. FIG. 15 is a perspective view of a valve body of a washing nozzle of a conventional dishwasher.

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

(Embodiment 1)
FIG. 1 is a view showing a side cross section of a dishwasher according to the first embodiment of the present invention. Note that FIG. 1 shows a state in which the dishwasher is built into the system kitchen SK.

As shown in FIG. 1, the dishwasher of the present embodiment includes a main body 1, a washing tank 2, a washing pump 6, a water supply valve 10, a door 1a, and the like.

In each of the following embodiments, as shown in the figure, the front direction is the direction in which the door 1a and the cleaning tank 2 are pulled out, and the rear direction is the direction in which the cleaning tank 2 is stored and the door 1a is closed. .. Further, the installation side of the dishwasher will be on the lower side, the opposite side will be on the upper side, and the right side will be the right side and the left side will be the left side when facing the front of the door 1a.

Specifically, the washing tank 2 includes a tableware basket 4, a washing nozzle 7, a residue filter 8a, a drain port 8, and the like inside. The cleaning tank 2 is provided inside the main body 1 so that it can be taken in and out in the front-rear direction. The washing tank 2 has an opening 2a on the upper surface. When the opening 2a is housed in the main body 1, the opening 2a is closed by a lid 3 arranged in the main body 1. In the tableware basket 4, a dish to be washed 5 such as tableware is placed. The door 1a is provided at the front portion of the cleaning tank 2 and covers the front surface of the main body 1.

The water supply valve 10 is provided at the rear part inside the main body 1. The water supply valve 10 supplies, for example, tap water, which becomes cleaning water when opened, to the cleaning tank 2.

The cleaning pump 6 is provided on the bottom surface of the main body 1, and the cleaning nozzle 7 is provided on the bottom surface side of the cleaning tank 2. The cleaning pump 6 pumps the cleaning water to the cleaning nozzle 7. The cleaning nozzle 7 injects the cleaning water toward the object to be cleaned 5 such as tableware while rotating by the pumped cleaning water. That is, the cleaning pump 6 pressurizes the cleaning water stored in the cleaning tank 2 and supplies it to the cleaning nozzle 7. The cleaning water sprayed from the cleaning nozzle 7 collides with the object to be cleaned 5 such as tableware to perform cleaning. The cleaning water includes a cleaning liquid containing a detergent and sprayed onto the object to be cleaned 5 and rinsing water for rinsing the object to be cleaned 5.

The drain port 8 and the heater 9 are provided at the bottom of the cleaning tank 2. The residue filter 8a is detachably provided at the drain port 8 and collects the residue washed and removed from the object to be cleaned 5. The heater 9 heats the washing water stored in the washing tank 2 in the washing step. The heater 9 heats the drying air in the washing tank 2 in the drying step. Further, the temperature sensor 11 is arranged on the outside of the bottom surface of the cleaning tank 2 and detects the temperature of the cleaning tank 2.

In the cleaning pump 6, the suction side is communicated with the drain port 8, and the cleaning water from which the residue has been removed by the residue filter 8a is circulated. Further, the cleaning pump 6 is configured to be able to drain the cleaning water from which the residue has been removed by reversing the rotation direction of the motor during circulation.

As described above, the dishwasher of the present embodiment is configured.

Next, the configuration of the cleaning nozzle 7 will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is a plan view of the washing nozzle of the dishwasher in the same embodiment. FIG. 3 is a side sectional view of the cleaning nozzle in the same embodiment.

The cleaning nozzle 7 includes an arm portion 12 that rotates in the horizontal direction and a tower portion 13. The tower portion 13 is arranged so as to project upward at the central portion corresponding to the rotation center of the arm portion 12.

The arm portion 12 includes a first arm nozzle 14 and a second arm nozzle 15 having an arm flow path and an injection port, which are exemplary of the flow path. The first arm nozzle 14 is provided with a rotation shaft 16 on the lower surface of the central portion. A rotary bearing (not shown) arranged corresponding to the rotary shaft 16 is provided near the center of the bottom of the cleaning tank 2. The rotary shaft 16 of the first arm nozzle 14 is fitted to the rotary bearing. As a result, the arm portion 12 is detachably attached to and rotatably attached to the rotary bearing.

Further, the rotary shaft 16 includes a shaft opening 16a that communicates with the discharge side of the cleaning pump 6. That is, when the cleaning pump 6 is driven by a motor (not shown), cleaning water is supplied from the shaft opening 16a of the rotating shaft 16 to the first arm nozzle 14.

The second arm nozzle 15 is rotatably provided on the upper surface of one end of the first arm nozzle 14 extending in the horizontal direction via the second rotation shaft 15a. That is, the second rotation shaft 15a of the second arm nozzle 15 is fitted to the communication portion 14a provided on the upper part of the first arm nozzle 14. As a result, the second arm nozzle 15 is detachably attached to the first arm nozzle 14.

The first arm nozzle 14 is provided with one or more first injection ports 17 on the upper surface, which is an example of the injection port. As shown in FIG. 2, the first injection port 17 is formed to have a different opening shape (for example, a circle, an ellipse, a semicircle, a square, a triangle, a star shape, etc.). The first arm nozzle 14 includes a first arm flow path 14b, which is an example of the arm flow path, inside. The first arm flow path 14b is provided so as to communicate from the rotating shaft 16 to the first injection port 17. As a result, the cleaning water pumped by the cleaning pump 6 reaches the first injection port 17 from the shaft opening 16a via the first arm flow path 14b. The arrived washing water is sprayed over a wide range in the washing tank 2 from the first injection port 17 having a different opening shape. At this time, the first arm nozzle 14 rotates in the direction opposite to the injection direction due to the reaction force of the injection of the washing water injected from the first injection port 17.

The second arm nozzle 15 includes a plurality of second injection ports 18 having the same opening shape (for example, a rectangle) on the upper surface, which is an example of the injection port. The plurality of second injection ports 18 are arranged point-symmetrically with respect to the second rotation axis 15a, including the opening shape. The second arm nozzle 15 includes a second arm flow path 15b, which is an example of the arm flow path, inside. The second arm flow path 15b is provided so as to communicate from the second rotation shaft 15a to the second injection port 18. As a result, the washing water pumped by the washing pump 6 reaches the second injection port 18 from the shaft opening 16a via the first arm flow path 14b and the second arm flow path 15b. The reached washing water is sprayed over a wide range in the washing tank 2 from the second injection port 18 arranged point-symmetrically. At this time, the second injection ports 18 arranged point-symmetrically generate the same injection reaction force in the same rotation direction. As a result, the second arm nozzle 15 rotates in the direction opposite to the injection direction. That is, the second arm nozzle 15 rotates while revolving due to the rotation of the first arm nozzle 14.

On the other hand, the tower portion 13 is provided so as to project upward from the upper surface of the first arm nozzle 14 at a position facing the rotation shaft 16 provided on the lower surface of the first arm nozzle 14. The tower portion 13 includes a tower nozzle 19 at the upper part. The tower nozzle 19 is composed of a detachable injection port portion 19a, a flow path portion 19b, and the like. In the present embodiment, the injection port portion 19a of the tower nozzle 19 includes, for example, three tower injection ports 23, which are examples of the injection ports.

Further, a water diversion mechanism 20 is arranged at the lower part of the tower portion 13. That is, the water diversion mechanism 20 of the present embodiment is arranged above the upper surfaces of the rotary shaft 16 and the first arm nozzle 14.

The inside of the flow path portion 19b of the tower nozzle 19 is divided into four, and four tower flow paths 21 are formed in the vertical direction (vertical direction). At this time, a similar tower flow path 21 is also formed in the injection port portion 19a so as to communicate with the tower flow path 21 of the flow path portion 19b. As shown in FIG. 3, the four tower flow paths 21 include a first tower flow path 21a, a second tower flow path (not shown), a third tower flow path 21c, and a fourth tower flow path (not shown). ). In each tower flow path 21, a fan-shaped opening 22 having a central angle of, for example, 90 degrees is formed on the lower surface on the water diversion mechanism 20 (lower) side. On the other hand, three tower injection ports 23 are formed at the tip of each upper portion of the tower flow path 21 of the injection port portion 19a.

Of the four tower flow paths 21, the first tower flow path 21a, the second tower flow path (not shown), and the third tower flow path 21c are formed at the tips of the injection port portions 19a. It communicates with the three tower injection ports 23. That is, the three tower injection ports 23 specifically include the first tower injection port 23a, the second tower injection port 23b, and the third tower injection port 23c. As shown in FIG. 2, the first tower injection port 23a, the second tower injection port 23b, and the third tower injection port 23c are formed with different opening shapes. As a result, the washing water is sprayed from the tower injection port 23 having different opening shapes in different directions and in different spread ranges. As a result, the washing water is evenly sprayed onto the dishes and the like on the upper part of the washing tank 2.

The fourth tower flow path (not shown) is formed by closing the tip. That is, the fourth tower flow path does not have a tower injection port for injecting wash water into the injection port portion 19a. As a result, as will be described later, it is possible to generate a timing in which the washing water is not sprayed in terms of time.

As described above, the washing nozzle 7 of the dishwasher of the present embodiment is configured.

Next, the water diversion mechanism 20 will be described with reference to FIGS. 3 and 5 with reference to FIGS. 4 and 5.

FIG. 4 is a cross-sectional perspective view of a main part of the cleaning nozzle 7 of the same embodiment as viewed from above. Specifically, it is a cross-sectional perspective view of the lower part of the tower portion 13 and the rotating shaft 16 as viewed from above. FIG. 5 is a perspective view of a main part of the cleaning nozzle 7 of the same embodiment as viewed from below. Specifically, it is a perspective view of the upper part of the tower part 13 and the valve body 24 of the water diversion mechanism 20 which will be described later, as seen from below.

The water distribution mechanism 20 is provided on the extension line of the rotation shaft 16 on the upper side of the rotation shaft 16 of the first arm nozzle 14 with the rotation center coaxial.

As shown in FIGS. 3 and 4, the water diversion mechanism 20 includes an outer wall 20a and an inner side wall 20b. At this time, the height of the inner side wall 20b is formed to be lower than the height of the outer wall surface 20a. The inner side wall 20b includes a plurality of ribs 20c on the inner side surface. Four ribs 20c are provided diagonally at intervals of 90 degrees in the circumferential direction. Since FIG. 4 shows a cross section, only three ribs 20c are shown. The rib 20c is formed to the same height as the upper surface of the inner side wall 20b. As a result, a diversion space 20d surrounded by the outer wall 20a is formed above the inner side wall 20b and the rib 20c.

Further, the water diversion mechanism 20 includes a valve body 24 as shown in FIG. The valve body 24 moves in the vertical direction in the water diversion space 20d. Specifically, when the washing water flows in from the shaft opening 16a of the rotating shaft 16, the valve body 24 receives water pressure and rises. On the other hand, when the inflow of the washing water is stopped, the valve body 24 descends so as to come into contact with the upper surface of the inner side wall 20b. At this time, as shown in FIG. 3, the valve body 24 is supported (guided) by the support shaft 28 provided at the center of the tower nozzle 19 so as to project into the water diversion space 20d.

That is, the water diversion mechanism 20 has a first tower flow path 21a and a second tower that communicate with the first tower injection port 23a, the second tower injection port 23b, and the third tower injection port 23c formed at the tip of the tower nozzle 19. The flow path (not shown) and the opening 22 of the third tower flow path 21c are switched to open and close by the rotational movement of the valve body 24. As a result, the washing water is sequentially injected from the first tower injection port 23a, the second tower injection port 23b, and the third tower injection port 23c.

On the other hand, in the fourth tower flow path (not shown), the tip end side of the tower nozzle 19 is blocked as described above. Therefore, even if the opening 22 of the fourth tower flow path communicates with the flow portion 27 of the valve body 24 and is opened, the washing water is not sprayed into the washing tank 2. As a result, it is possible to generate a timing in which the washing water is not sprayed in terms of time.

As described above, the water distribution mechanism 20 of the dishwasher of the present embodiment is configured.

Next, the shape of the valve body 24 will be described with reference to FIGS. 3 and 6 to 10. FIG. 6 is a perspective view of the valve body of the cleaning nozzle of the same embodiment as viewed from above. FIG. 7 is a side view of the valve body. FIG. 8 is a top view of the valve body. FIG. 9 is a bottom view of the valve body. FIG. 10 is a side sectional view of the vicinity of the valve body.

As shown in FIG. 6, the valve body 24 is composed of a disk portion 25, a hollow cylindrical portion 26, an upper surface engaging portion 30, a lower surface engaging portion 31, and the like. The disk portion 25 includes a distribution portion 27 through which the washing water passes. The distribution section 27 is formed by cutting out a part of the disk section 25. The distribution unit 27 sequentially communicates with each opening 22 of the four tower flow paths 21 by rotation accompanying the vertical movement of the valve body 24. The hollow cylindrical portion 26 is provided in the center of the disk portion 25 and is formed hollow.

As shown in FIGS. 3 and 10, the valve body 24 is arranged so that the support shaft 28 protruding from the tower portion 13 is inserted into the hollow cylindrical portion 26. As a result, the valve body 24 is guided by the support shaft 28 and stably moves up and down along the support shaft 28.

The disk portion 25 of the valve body 24 is composed of two layers, an upper cushioning portion 25a formed as a separate body and a lower main body 25b. The cushioning portion 25a of the disk portion 25 is formed of an elastic material such as rubber. The cushioning portion 25a alleviates the impact at the time of collision between the valve body 24 that has moved upward and the lower surface of the tower nozzle 19. As a result, the generation of noise and the like due to the collision is suppressed.

As described above, the valve body 24 has an upwardly convex upper surface engaging portion 30 arranged on the upper surface side of the disk portion 25 and a downwardly convex surface arranged on the lower surface side, as shown in FIGS. 6 to 8. It has a bottom surface engaging portion 31 having a shape.

The upper surface engaging portion 30 is formed in four arcuate shapes having a central angle of, for example, 90 degrees and having a thickness in the radial direction. The arc-shaped upper surface engaging portion 30 includes an inclined surface 30a and a vertical surface 30b along the circumference, respectively. The four upper surface engaging portions 30 having the same shape are arranged so as to be continuously connected along the circumference. At this time, the inclined surface 30a is formed so as to be inclined downward (upper surface of the disk portion 25), for example, counterclockwise when viewed from above.

On the other hand, the lower surface engaging portion 31 is formed on the lower surface side of the main body 25b of the disk portion 25, as shown in FIGS. 7 and 9. The lower surface engaging portion 31 is formed by a deformed pentagon consisting of two inclined surfaces 31a inclined in different directions along the circumference, two vertical surfaces 31b at both ends, and a bottom surface of the disk portion 25 on the main body 25b side. Will be done. The two inclined surfaces 31a are formed by being combined in a mountain shape so as to project from the vertical surfaces 31b at both ends in the circumferential direction. As shown in FIG. 9, the lower surface engaging portions 31 are arranged at equal intervals with gaps L of predetermined dimensions at three positions of one circumference divided into four equal parts, for example, at 90 degrees. To. A distribution portion 27 having a disc portion 25 cut out is formed in the remaining one portion of the circumference divided into four equal parts.

Further, as shown in FIG. 10, an upper sliding portion 32 is formed at the base 28a of the support shaft 28 of the tower portion 13. The inclined surface 30a of the upper surface engaging portion 30 of the valve body 24 slides on the upper sliding portion 32.

On the other hand, as shown in FIG. 4, a semi-cylindrical lower sliding portion 33 is formed at the upper end of the rib 20c, for example. The inclined surface 31a of the lower surface engaging portion 31 of the valve body 24 slides on the lower sliding portion 33. At this time, the gap L between the lower surface engaging portions 31 of the valve body 24 is set to a dimension that allows the lower sliding portion 33 provided on the rib 20c to smoothly enter and exit. As a result, the vertically moving valve body 24 rotates while the inclined surface 31a of the lower surface engaging portion 31 slides along the lower sliding portion 33 of the rib 20c. Then, in the valve body 24, the gap L between the lower surface engaging portions 31 is fitted into the rib 20c.

The dimensions and positional relationship between the upper surface engaging portion 30 of the valve body 24 and the upper sliding portion 32 of the support shaft 28, and the dimensions of the lower surface engaging portion 31 of the valve body 24 and the lower sliding portion 33 of the rotating shaft 16. And the positional relationship, and the positional relationship between the upper surface engaging portion 30 and the lower surface engaging portion 31 of the valve body 24 are configured as follows. That is, the valve body 24 rotates 90 degrees in the circumferential direction for each round trip in the vertical direction. Therefore, the dimensions and the positional relationship are set so that the flow section 27 of the valve body 24 and the openings 22 of the four tower flow paths 21 sequentially match each time the valve body 24 is rotated by 90 degrees.

As described above, the valve body 24 of the dishwasher of the present embodiment is configured.

Next, the switching operation of the water diversion mechanism 20 by the valve body 24 will be described with reference to FIG.

First, when the cleaning pump 6 is stopped and the cleaning water is not supplied, the valve body 24 stands still in contact with the upper end surface of the inner side wall 20b of the water diversion mechanism 20 and the lower sliding portion 33 of the rib 20c. There is. At this time, the valve body 24 is stationary with the lower sliding portion 33 of the rib 20c fitted in the gap L of the lower surface engaging portion 31 of the valve body 24.

Next, when the user turns on the power and drives the cleaning pump 6, the cleaning water flows into the water diversion mechanism 20 from the shaft opening 16a of the rotating shaft 16 (see arrow A shown in FIG. 3). At this time, all the cleaning water flowing into the cleaning nozzle 7 from the shaft opening 16a of the rotating shaft 16 passes through the diversion space 20d. As a result, the washing water applies a large water pressure to the valve body 24 to raise the valve body 24 and rotate the valve body 24. As a result, the valve body 24 that rises while rotating can reliably switch to the tower flow path 21 that constitutes the flow path supplied to the tower portion 13.

The valve body 24 is the main body 25b of the disk portion 25, receives the water pressure of the washing water, and rises along the support shaft 28 of the tower portion 13. When the valve body 24 rises by a predetermined dimension, the inclined surface 30a of the upper surface engaging portion 30 of the valve body 24 comes into contact with the upper sliding portion 32 of the support shaft 28 and slides. At this time, the valve body 24 rotates along the inclined surface 30a by a first predetermined angle (for example, 50 degrees).

That is, as shown in FIGS. 5 and 10, the valve body 24 rises while rotating until it comes into contact with the lower surface of the tower nozzle 19 (corresponding to the position of the opening 22). As a result, for example, the distribution portion 27 of the valve body 24 and the opening portion 22 of the first tower flow path 21a are arranged so as to face each other. As a result, the distribution section 27 and the opening 22 communicate with each other to open the first tower flow path 21a. At this time, the opening 22 from the second tower flow path to the fourth tower flow path of the tower portion 13 is arranged so as to face the cushioning portion 25a of the disk portion 25 of the valve body 24. Therefore, the opening 22 from the second tower flow path to the fourth tower flow path is in a closed state.

As a result, the washing water flows into the first tower flow path 21a and is injected from the first tower injection port 23a of the tower injection ports 23 provided in the injection port portion 19a of the tower nozzle 19 (FIG. 3). See arrow B).

As shown by the arrow C in FIG. 3, most of the washing water that pushed up the valve body 24 passes through the gap 20e between the outer wall 20a and the inner side wall 20b constituting the water diversion mechanism 20 and flows into the first arm. It flows into the road 14b.

Next, the cleaning pump 6 is driven for a predetermined time and then stopped. As a result, the washing water does not flow into the water diversion mechanism 20. Therefore, the valve body 24, which is not subjected to the water pressure from the washing water, descends by its own weight.

Then, the valve body 24 is lowered by a predetermined dimension. Specifically, due to the rotation during ascending, the valve body 24 descends while the inclined surface 31a of the lower surface engaging portion 31 abuts on the lower sliding portion 33 of the rib 20c and slides. As a result, the valve body 24 rotates by a second predetermined angle (for example, 40 degrees) due to the mountain-shaped inclined surface 31a structure. Then, the valve body 24 descends until it comes into contact with the upper end surface of the inner side wall 20b and the lower sliding portion 33 of the rib 20c. As a result, the valve body 24 comes to rest in a state of being rotated 90 degrees by one ascending and descending. That is, the valve body 24 rotates 40 degrees when descending and 50 degrees when ascending. Therefore, in the stationary state after the valve body 24 is lowered, the distribution section 27 and the opening 22 are arranged so as to be offset by 40 degrees.

Next, when the cleaning pump 6 is driven again, the valve body 24 rises while rotating due to sliding again. Then, only the opening 22 of the next second tower flow path communicates with the flow section 27 of the valve body 24, and the washing water is supplied to the second tower flow path.

That is, the valve body 24 is sequentially rotated by 90 degrees by the intermittent drive of the cleaning pump 6. As a result, the flow paths of the first tower flow path 21a, the second tower flow path, the third tower flow path 21c, and the fourth tower flow path, which constitute the tower flow path 21, are switched in this order, and the washing water is discharged. It flows. As a result, the washing water is injected from the first tower injection port 23a, the second tower injection port 23b, and the third tower injection port 23c, which form the tower injection port 23 of each tower flow path 21. At this time, as described above, since the tower injection port is not formed in the fourth tower flow path, the washing water is not injected. As a result, it is possible to provide different timings for the injection of the washing water.

Then, when the valve body 24 reciprocates up and down four times, it rotates 360 degrees and returns to its original position. The state is repeated every four times, and the injection of the washing water is executed.

The cleaning water supplied to the arm portion 12 of the cleaning nozzle 7 goes to the first arm flow path 14b each time the valve body 24 moves up and down, regardless of the switching position of the valve body 24 of the water distribution mechanism 20. Inflow. Then, the cleaning water is injected into the cleaning tank 2 from the first injection port 17 of the first arm nozzle 14 and the second injection port 18 of the second arm nozzle 15.

As described above, the switching operation of the water diversion mechanism 20 by the valve body 24 is executed.

Next, the operation of the dishwasher having the above configuration will be described.

First, the user grasps the handle 1aa of the door 1a and pulls out the washing tank 2 from the main body 1 of the dishwasher. Next, the user sets the object to be washed 5 such as tableware in the tableware basket 4 from the opening 2a at the upper part of the washing tank 2. Then, a predetermined amount of detergent is put into the washing tank 2. Next, the user pushes the cleaning tank 2 into the main body 1 and closes the door 1a. Then, the user sets the operation course with the operation unit provided in the control unit (not shown), and operates, for example, the start button (not shown) to start the cleaning operation. As a result, the control unit executes the cleaning operation based on the operation course.

That is, the control unit describes the washing step of removing the dirt of the object to be cleaned 5, the rinsing step of flushing the detergent and the residue adhering to the object to be cleaned 5, and the drying step of drying the object to be cleaned 5 below. It is executed in order according to the method.

First, the washing step of the washing operation will be described.

First, the control unit operates the water supply valve 10 to supply a predetermined amount of washing water to the washing tank 2. When the water supply is completed, the cleaning pump 6 is driven to pump the cleaning water, and the cleaning water is ejected from the cleaning nozzle 7 arranged near the bottom of the cleaning tank 2.

Next, the control unit energizes the heater 9 while injecting the washing water to heat the washing water. At this time, the control unit detects the temperature of the washing water by the temperature sensor 11 via the wall on the bottom surface of the washing tank 2. Then, the control unit controls so that the washing water reaches a predetermined temperature.

Next, the sprayed cleaning water cleans the dirt of the object to be cleaned 5, passes through the residue filter 8a and the drain port 8, and is sucked into the cleaning pump 6 again. The cleaning pump 6 pumps the sucked cleaning water and supplies the cleaning water to the cleaning nozzle 7. The supplied washing water flows into the washing nozzle 7 from the shaft opening 16a of the rotating shaft 16. That is, the washing water circulates as described above to wash the object to be washed 5.

At this time, as described above, the valve body 24 of the water diversion mechanism 20 of the cleaning nozzle 7 receives a water pressure larger than the own weight of the valve body 24 from the inflowing cleaning water and rises. Then, the distribution portion 27 of the valve body 24 is communicated only with the first tower flow path 21a of the tower nozzle 19. As a result, the washing water passes through the first tower flow path 21a and is sprayed toward the object to be cleaned 5 from the first tower injection port 23a provided at the tip of the first tower flow path 21a. In this case, most of the washing water with the valve body 24 raised makes a U-turn in the water diversion space 20d and flows into the first arm flow path 14b of the first arm nozzle 14.

The first arm nozzle 14 is extended in the left-right direction around the rotation shaft 16 as shown in FIGS. 2 and 3. Therefore, the first arm flow path 14b in the first arm nozzle 14 is also divided in the left-right direction and extended. A first injection port 17 is arranged on the tip end side of the first arm flow path 14b on the left side. On the other hand, a second arm nozzle 15 is arranged on the tip end side of the first arm flow path 14b on the right side. Therefore, the washing water that has flowed into the first arm flow path 14b on the left side shown in FIG. 3 is sprayed from one or more first injection ports 17. Then, the first arm nozzle 14 rotates, for example, clockwise due to the reaction force of the jet of the sprayed washing water.

On the other hand, the washing water flowing into the first arm flow path 14b on the right side shown in FIG. 3 flows into the second arm nozzle 15 from the second rotation shaft 15a. The washing water flowing into the second arm nozzle 15 passes through the second arm flow path 15b extending in the left-right direction, and is ejected from the two second injection ports 18 arranged point-symmetrically. Then, the second arm nozzle 15 rotates, for example, clockwise due to the reaction force of the jet of the sprayed washing water. As a result, the first arm nozzle 14 and the second arm nozzle 15, which have different lengths, inject washing water over a wide range from the first injection port 17 and the second injection port 18 while rotating at different rotation speeds.

That is, the water diversion mechanism 20 of the present embodiment is configured so that the supply of the washing water to the arm portion 12 is not stopped. As a result, while the washing pump 6 is being driven, the washing water is constantly sprayed from below the tableware basket 4. Therefore, the cleaning water jetted from the arm portion 12 maintains the cleaning power from below the object to be cleaned 5.

At the same time, the tower nozzle 19 of the present embodiment rotates together with the first arm nozzle 14 and injects washing water from the first tower injection port 23a formed at a high position. At this time, the cleaning pump 6 is always driven. Therefore, the valve body 24 closes the flow paths other than the first tower flow path 21a in the tower nozzle 19, and rotates in synchronization with the cleaning nozzle 7.

Next, when the control unit drives the cleaning pump 6 for a predetermined time, the control unit temporarily stops the cleaning pump 6. As a result, the valve body 24 of the water diversion mechanism 20 descends while rotating at a predetermined angle. Then, the cleaning pump 6 is re-driven to prepare for the next injection of cleaning water. At this time, in the present embodiment, the water diversion mechanism 20 is provided at a position higher than the water level of the washing water staying at the bottom of the washing tank 2. Therefore, the washing water remaining in the water diversion space 20d is quickly discharged from the water diversion space 20d through the first injection port 17 and the shaft opening 16a. As a result, the valve body 24, which is pushed up by the water pressure of the washing water, also quickly descends. As a result, the injections from the plurality of tower injection ports 23 of the tower nozzles 19 can be sequentially switched in a short time.

Next, when the control unit drives the cleaning pump 6 again, the valve body 24 rises under the water pressure of the cleaning water. As a result, the distribution section 27 of the valve body 24 communicates with the next second tower flow path. As a result, the washing water passes through the second tower flow path and is sprayed onto the object to be washed 5 from the second tower injection port 23b provided at the tip thereof, which is shown in FIG. Then, the control unit stops the drive of the cleaning pump 6 after a predetermined time has elapsed.

Next, the control unit drives the cleaning pump 6 in the same manner as described above, and communicates the distribution unit 27 of the valve body 24 with the next third tower flow path 21c. As a result, the cleaning water is sprayed from the third tower injection port 23c of the third tower flow path 21c toward the object to be cleaned 5. At this time, the operations of the first arm nozzle 14 and the second arm nozzle 15 are continued regardless of the switching from the first tower flow path 21a to the third tower flow path 21c. That is, the first arm nozzle 14 and the second arm nozzle 15 inject cleaning water toward the object to be cleaned 5 over a wide range from below while rotating.

Next, the control unit drives the cleaning pump 6 to communicate the flow unit 27 of the valve body 24 with the fourth tower flow path. However, the tower injection port is not formed at the tip of the fourth tower flow path. Therefore, the injection of the washing water from the tower nozzle 19 is temporarily interrupted. At this time, since the washing water is not sprayed from the tower nozzle 19, the water pressure of the washing water flowing into the arm portion 12 becomes high. As a result, the amount of washing water jetted from the arm portion 12 increases. That is, the amount and momentum of the washing water ejected from the first arm nozzle 14 and the second arm nozzle 15 increases. As a result, the form of the washing water sprayed on the object to be washed 5 changes. Specifically, the speed, direction, arrival position, and the like of the washing water that hits the object to be washed 5 change. As a result, the cleaning power of the cleaning water jetted from the arm portion 12 is improved.

That is, the control unit controls to repeatedly drive and stop the cleaning pump 6. Then, the injection direction of the washing water ejected from the tower nozzle 19 is switched via the water diversion mechanism 20. As a result, the washing water is ejected while rotating from the arm portion 12 provided at a low position. At the same time, while the tower unit 13 is also rotating, the washing water is sequentially injected from the three tower injection ports 23 provided at high positions of the tower unit 13 and having different injection directions and spreads. That is, the washing water is sprayed from a high position of the tower portion 13. Therefore, in particular, the cleaning range to the upper part of the cleaning tank 2 can be expanded. Further, the object to be cleaned 5 is more reliably washed over a wide range including the height direction.

Further, the water dividing mechanism 20 switches the plurality of tower injection ports 23 to inject the washing water. Therefore, since the spraying is not performed from the plurality of tower injection ports 23 at the same time, the amount of washing water used can be limited. As a result, the use of washing water can be suppressed. As a result, the detergency can be improved while saving water.

Further, while the washing pump 6 is being driven, washing water is constantly sprayed from below the tableware basket 4 via the arm portion 12. Therefore, the detergency from below can be maintained.

As described above, the control unit performs the washing step for a predetermined time.

Next, the rinsing step of the washing operation will be described.

When the washing step is completed, the control unit discharges the washing water containing dirt to the outside of the main body 1 of the dishwasher. Then, the control unit starts the rinsing step and newly supplies the washing water into the washing tank 2.

Next, the control unit operates the cleaning pump 6 in the same manner as in the cleaning step, and injects new cleaning water from the cleaning nozzle 7 toward the object to be cleaned 5. Then, the residual detergent, residue, and the like are washed away from the object to be cleaned 5 with washing water. At this time, the control unit repeatedly executes operations such as discharging the washing water and supplying the washing water two to three times, for example, and performs a rinsing step.

Then, when the rinsing step is completed, the control unit subsequently heats the air in the washing tank 2 with the heater 9 to dry the object to be washed 5, and performs a drying step for a predetermined time.

With the above, the washing operation of the dishwasher is completed.

As described above, the dishwasher of the present embodiment has a washing tank 2 for accommodating the object to be washed 5, a washing pump 6 for pressurizing the washing water, and a washing nozzle which is rotatably supported and injects the washing water. 7 is provided. The cleaning nozzle 7 has a rotating shaft 16 into which cleaning water flows, a plurality of tower flow paths 21 having a tower injection port 23, and a water distribution mechanism 20 for switching the supply of cleaning water to the plurality of tower flow paths 21. The water distribution mechanism 20 is configured to be arranged above the rotation shaft 16 on an extension line of the rotation shaft 16.

According to this configuration, the water diversion mechanism 20 is arranged on the upper part of the cleaning nozzle 7. As a result, it is not necessary to increase the rotation shaft 16 of the cleaning nozzle 7 in the vertical direction. Similarly, the bearing portion fitted with the rotating shaft 16 does not need to be large. Therefore, it is not necessary to arrange the tableware basket 4 provided in the washing tank 2 at a high position. As a result, the capacity of the object to be washed 5 such as tableware to be accommodated in the tableware basket is increased, and the object to be cleaned 5 having a larger shape can be accommodated. Therefore, it can accommodate more objects 5 to be washed than a conventional dishwasher. In addition, the object to be cleaned 5 can be washed more reliably while performing the water saving operation.

Further, the tower unit 13 is provided with a plurality of tower injection ports 23, and the water distribution mechanism 20 is configured to switch the supply of wash water to the plurality of tower injection ports 23. According to this configuration, the washing water is also sprayed from a high position of the tower portion 13. Therefore, in particular, the cleaning range to the upper part of the cleaning tank 2 can be expanded. Further, since the water dividing mechanism 20 sequentially switches between the plurality of tower injection ports 23 to inject the washing water, the amount of the washing water can be limited. As a result, the cleaning power can be improved while saving water without increasing the amount of cleaning water used.

Further, the water distribution mechanism 20 is configured to have a timing at which the washing water is not supplied to any of the plurality of tower injection ports 23. According to this configuration, the washing water is not sprayed from the tower injection port 23 during a predetermined timing. Therefore, the amount of washing water flowing into the arm portion 12 increases at the timing when the washing water is not sprayed from the tower portion 13. At this time, the water pressure of the washing water flowing into the arm portion 12 increases. As a result, the amount and momentum of the washing water jetted from the arm portion 12 increases. That is, the form of the washing water sprayed on the object to be washed 5 changes. As a result, the cleaning power of the cleaning water ejected from the rotating arm portion 12 is improved.

Further, the valve body 24 of the water diversion mechanism 20 rotates 90 degrees in the circumferential direction by one reciprocating motion up and down. Then, the valve body 24 returns to its original position by four reciprocating motions up and down. Therefore, it is not necessary to separately provide an actuator such as a motor to rotate the valve body 24 and switch the flow path for supplying the washing water. As a result, the diversion space 20d has no element other than the valve body 24 that obstructs the flow of the washing water. As a result, the washing water supplied from the outside can be efficiently separated with a simple configuration.

In the present embodiment, the configuration in which one circumference of the tower nozzle 19 is divided into four by using four tower flow paths 21 of the tower portion 13 to be divided by the valve body 24 has been described as an example, but the present invention is limited to this. I can't. For example, one circumference of the tower nozzle 19 may be divided into two, three, or five or more to form a tower flow path. In this case, it is preferable that at least one tower flow path is configured not to have a tower injection port.

Further, the valve body 24 of the present embodiment has a hollow cylindrical portion 26 into which the support shaft 28 of the tower portion 13 is inserted, and the valve body 24 moves up and down along the support shaft 28. As a result, the valve body 24 can move smoothly in the vertical direction. Further, the hollow cylindrical portion 26 of the valve body 24 is provided in the center of the valve body 24. Therefore, the washing water can flow into the diversion space 20d without obstructing the flow. This reduces the flow path resistance to the inflowing wash water. Therefore, the washing water can be reliably switched by the disk portion 25 and supplied to the tower flow path 21 without suppressing the flow velocity and the supply amount of the washing water. As a result, the cleaning power of the dishwasher can be further improved.

Further, the valve body 24 of the present embodiment is configured to be separated from the tower flow path 21 by reciprocating movement in the vertical direction. Therefore, the valve body 24 can be rotationally driven without leaving foreign matter mixed in the washing water bitten. Even if a foreign substance is caught, the foreign substance will come off when the valve body 24 is lowered next time, so that the foreign substance will not remain bitten.

In the present embodiment, a configuration in which the valve body 24 is moved in the vertical direction in response to the drive and stop of the cleaning pump 6 has been described as an example, but the present invention is not limited to this. For example, the valve body 24 may be configured to move in the vertical direction depending on the rotation speed of the motor constituting the cleaning pump 6. Specifically, the rotation speed of the motor is changed to a high rotation speed that only raises the valve body 24 and a low rotation speed that only lowers the valve body 24, so that the valve body 24 is moved in the vertical direction. You may move it to. As a result, the cleaning pump 6 can be continuously driven instead of intermittently driven. Therefore, it is possible to suppress the power consumption associated with the switching of the drive.

Further, in the present embodiment, the configuration in which all the cleaning water flowing from the rotating shaft 16 into the cleaning nozzle 7 passes through the diversion space 20d has been described as an example, but the present invention is not limited to this. For example, a part of the washing water that has flowed into the washing nozzle 7 is supplied to the tower injection port 23 through the water diversion space 20d, and the remaining washing water does not pass through the water diversion space 20d and is supplied to the arm portion 12. The washing water may be divided so as to be supplied to the injection port. That is, in the present embodiment, the water diversion mechanism 20 provided with the diversion space 20d for moving the valve body 24 up and down is arranged above the rotation shaft 16 and further above the first arm flow path 14b. Therefore, in the configuration in which all the washing water passes through the water dividing space 20d, the washing water flowing into the first arm flow path 14b becomes a U-turn in the water dividing space 20d. As a result, the flow path resistance to the washing water in the diversion space 20d increases. Therefore, the washing pump 6 requires a large force to pump the washing water. However, according to the above distribution configuration, the washing water flowing into the first arm flow path 14b does not pass through the diversion space 20d, so that the flow path resistance can be suppressed. As a result, the washing pump 6 can reduce the force for pumping the washing water. As a result, the cleaning pump 6 can be miniaturized and energy can be saved.

Further, in the present embodiment, the configuration in which the water diversion mechanism 20 divides water only into a plurality of tower flow paths provided in the tower nozzle 19 has been described as an example, but the present invention is not limited to this. For example, the water diversion mechanism 20 may be configured to divert water including the arm flow path of the first arm nozzle 14. This makes it possible to realize various fountain forms.

Further, the tower nozzle 19 of the present embodiment is configured such that the injection port portion 19a provided with the tower injection port 23 and the flow path portion 19b provided with the tower flow path 21 can be disassembled. Further, the tower nozzle 19 is configured to be detachable from the water diversion mechanism 20. According to this configuration, the injection port portion 19a of the tower nozzle 19 can be removed from the flow path portion 19b and easily replaced with an injection port portion 19a having a tower injection port having different injection characteristics. The injection characteristics include an injection amount, an injection direction, and a diffusion angle that change depending on the shape of the tower injection port 23. Further, the injection characteristics include the position and height at which the tower injection port 23 is arranged. Here, the height at which the tower injection port 23 is arranged can be easily adjusted by, for example, the length of the flow path portion 19b.

That is, according to this configuration, it is possible to clean in any form by simply replacing the injection port portion 19a having different injection characteristics without changing the basic configuration such as the arm portion 12 of the cleaning nozzle 7 and the water distribution mechanism 20. Can be realized. Specifically, it is replaced with an appropriate injection port portion 19a according to the shape and depth of the washing tank 2 or the layout of the tableware basket 4. As a result, effective detergency can be exhibited. Further, by sharing the basic configuration, it is possible to suppress the development cost and the parts cost and provide a lower cost dishwasher.

Further, according to this configuration, the tower nozzle 19 can be easily attached and detached by the user as in the case of the first arm nozzle 14 and the second arm nozzle 15. Therefore, the user can perform maintenance such as cleaning the tower injection port 23 and the tower flow path 21 on a daily basis. As a result, it is possible to suppress a decrease in cleaning power due to clogging of the tower injection port 23 and the tower flow path 21.

(Embodiment 2)
Hereinafter, the dishwasher according to the second embodiment will be described with reference to FIGS. 11 and 12. 11 and 12 are front sectional views of the dishwasher according to the second embodiment of the present invention. That is, the dishwasher of the present embodiment is different from the dishwasher of the first embodiment mainly in the configuration of the upper shelf basket. Since the main configuration of the dishwasher of the present embodiment is the same as the configuration of the dishwasher described in the first embodiment, detailed description thereof will be omitted.

As shown in FIGS. 11 and 12, the tableware basket 4 of the present embodiment is composed of two upper and lower tiers of a lower basket 41 and an upper shelf basket 42. The upper shelf basket 42 is configured to be expandable in the left-right direction, and among the objects to be washed 5, mainly cups and teacups are placed. Of the objects 5 to be washed, the lower basket 41 mainly holds dishes and bowls.

Further, the accessory case 43 is arranged so as to be laterally movable in the left-right direction on the lower basket 41. Of the objects to be washed 5, the accessory case 43 mainly houses elongated cutlery such as chopsticks and spoons in an upright state.

The upper shelf car 42 is provided with sliding members 44 at both ends in the front-rear direction. Then, the rail member 45 is arranged horizontally on the front and rear side walls of the cleaning tank 2 corresponding to the sliding member 44 of the upper shelf car 42. The rail member 45 includes a groove portion 45a. The sliding member 44 slides in the groove portion 45a of the rail member 45 in the left-right direction. As a result, the upper basket 42 can be laterally moved in the washing tank 2 of the dishwasher in the left-right direction above the lower basket 41. That is, it is possible to laterally move from the position of the upper shelf car 42 closest to the left side shown in FIG. 11 to the position of the upper shelf car 42 closer to the right side shown in FIG. At this time, it is preferable to move the accessory case 43 in the lateral direction so as not to interfere with the lateral movement of the upper shelf basket 42.

The upper shelf car 42 can also be arranged upright with the sliding member 44 as a rotation axis. As a result, the upper basket 42 does not become an obstacle when a large plate, frying pan, or the like is placed on the lower basket 41.

According to this configuration, the upper shelf basket 42 can be moved laterally. As a result, when the object to be cleaned 5 is set in the lower basket 41, the upper shelf cage 42 can be moved laterally, for example, to stand upright, and the object to be cleaned 5 can be set in the lower basket 41. Further, even when the object to be washed 5 is already set in the upper shelf car 42, the object to be washed 5 can be set in the lower car 41 by laterally moving the upper shelf car 42 in either the left or right direction. Further, by laterally moving the upper shelf car 42, it is possible to form a space in which the auxiliary car 46, which will be described later, can be inverted in the horizontal direction.

Further, as shown in FIG. 12, the rail member 45 can regulate the moving range of the upper shelf car 42 by adjusting the length of the groove portion 45a in the left-right direction. Specifically, when the accessory case 43 is in the rightmost position, the groove portion 45a is configured so as not to cover the upper space of the accessory case 43 even if the upper shelf basket 42 moves laterally to the maximum. That is, the moving range of the upper shelf basket 42 is restricted by the groove portion 45a so as to leave a portion that does not cover the upper space of the accessory case 43.

According to this configuration, even if the user inadvertently moves the upper shelf car 42 to the maximum laterally, the cutlery housed in the accessory case 43 is prevented from coming into contact with the right end of the upper shelf car 42. can. This makes it possible to prevent the application of a load such as an impact due to contact to the cutlery of the accessory case 43. As a result, damage to the accessory case 43 and cutlery can be prevented.

Further, an auxiliary car 46 may be further provided in the upper shelf car 42 of the present embodiment. Specifically, the auxiliary car 46 is rotatably provided on the left side of the upper shelf car 42 on the side opposite to the accessory case 43. The auxiliary car 46 can be rotated and inverted in the horizontal direction by removing it from the locking portion (not shown). This makes it possible to place a cup or the like in the auxiliary basket 46. As a result, a larger amount of the object to be cleaned 5 can be accommodated in the cleaning tank 2. That is, as shown in FIG. 12, the auxiliary car 46 is configured to be inverted in the space formed by the lateral movement of the upper shelf car 42 in the right direction.

Further, when the auxiliary car 46 is rotated from the upper shelf car 42 and inverted, the left end of the auxiliary car 46 is supported by a support portion (not shown) formed on the wall surface of the washing tank 2. As a result, the object to be cleaned 5 can be placed on the auxiliary car 46 and is supported by the support portion. That is, the tip of the auxiliary car 46 is supported by the support portion. Therefore, the auxiliary car 46 is held with sufficient strength even when the object to be cleaned 5 is placed. As a result, more objects 5 to be cleaned can be accommodated.

The dishwasher of the present embodiment also includes a washing nozzle 7 like the dishwasher of the first embodiment. The cleaning nozzle 7 includes an arm portion 12 that rotates in a wide range in the horizontal direction below the lower basket 41, and a tower portion 13. The tower portion 13 is provided at the central portion of the arm portion 12 so as to project above the rotation shaft 16 and the arm portion 12.

As described above, the dishwasher of the present embodiment is configured.

Hereinafter, the operation of the dishwasher configured as described above will be described with reference to FIG. 11.

First, the user pulls out the washing tank 2 from the main body 1 of the dishwasher. Then, the user sets the object to be washed 5 such as tableware in the tableware basket 4 from the opening 2a at the upper part of the washing tank 2. At this time, in the case of the dishwasher of the present embodiment, the user first moves to the left end with the auxiliary basket 46 and the upper shelf basket 42 erected. As a result, the area of the upper opening 2a with respect to the lower basket 41 of the washing tank 2 is also increased. Then, the user sets a plate, a bowl, or the like in the lower basket 41 in the above state. Further, the user moves the accessory case 43 to the right end and stores the chopsticks, spoons, etc. in the accessory case 43 in a standing state.

Next, the user inverts the upper shelf basket 42 and moves it to the right end. Further, the auxiliary car 46 is inverted in the space formed by the movement of the upper shelf car 42. Then, a cup, a teacup, or the like is set in a large area formed by the inversion of the upper shelf basket 42 and the auxiliary basket 46. When the setting of all the objects to be cleaned 5 is completed, the user puts a predetermined amount of detergent into the cleaning tank 2.

Next, the user pushes the cleaning tank 2 into the main body 1 and closes the door 1a. Then, the user sets the operation course with the operation unit provided in the control unit (not shown), and operates, for example, the start button (not shown) to start the cleaning operation. As a result, the control unit executes the cleaning operation based on the operation course. That is, the control unit sequentially executes a washing step of removing dirt from the object to be cleaned 5, a rinsing step of flushing the detergent and residue adhering to the object to be cleaned 5, and a drying step of drying the object to be cleaned 5. do.

Since the cleaning operation is the same as the method described in the first embodiment, the description thereof will be omitted.

That is, the dishwasher of the second embodiment can place dishes, cups, and the like in a large area of the upper basket 42 and the auxiliary basket 46. Therefore, more objects to be washed 5 can be set than in the upper basket of the conventional dishwasher.

However, it is usually difficult to wash many objects 5 set in the upper shelf car 42 and the auxiliary car 46 in the above state. That is, when cleaning is performed only by the water flow jetted from the arm portion 12 provided below the lower car 41, there is a high possibility that the washing water is blocked by the object to be cleaned 5 set in the lower car 41. That is, it becomes difficult to reliably wash many objects 5 set in the upper shelf car 42 and the auxiliary car 46.

Therefore, in the dishwasher of the present embodiment, the tower portion 13 is provided above the rotating shaft 16 of the rotating arm portion 12, and the tower nozzle 19 for injecting the washing water is arranged. Further, a plurality of tower injection ports 23 having different opening shapes are formed at the tip of the tower nozzle 19. Therefore, the washing water is sprayed from each tower injection port 23 in different directions and in different spread ranges as shown by the dotted line arrow in FIG. As a result, the washing water is evenly sprayed onto the upper part of the washing tank 2 without being blocked by the object to be washed 5 set in the lower basket 41. As a result, the cleaning water can be accurately sprayed onto the object to be cleaned 5 set in the upper shelf basket 42 to effectively clean the object 5.

That is, the dishwasher in the present embodiment can expand the upper shelf basket 42 to accommodate a large number of objects 5 to be washed. Further, the housed object 5 to be cleaned can be reliably washed by the arrangement of the tower portion 13.

In each of the above embodiments, the tower injection port 23 is not provided in the fourth tower flow path of the tower nozzle 19. That is, although the configuration in which the tip of the fourth tower flow path is blocked and the timing for not injecting the washing water from the tower portion 13 is generated has been described as an example, the present invention is not limited to this. For example, tower injection ports 23 corresponding to each of the tips of the plurality of tower flow paths 21 formed in the tower portion 13 may be provided. With this configuration, it is possible to increase the types of opening shapes of the tower injection port 23. As a result, the washing water can be sprayed evenly over a wider area.

Further, even if the plurality of tower injection ports 23 are sequentially switched by the water distribution mechanism 20, there is little change in the pressure and the amount of the washing water flowing into the arm portion 12. Therefore, the arm portion 12 that rotates by the reaction force of the injection of the washing water ejected from the injection port of the arm portion 12 can rotate at a constant predetermined speed. As a result, the cleaning nozzle can be rotated stably and smoothly even if the predetermined speed is set to a lower speed.

As described above, the dishwasher of the present invention has a dishwasher on which an object to be washed is placed, a washing tank in which the dishwasher is housed, a washing pump for pumping washing water, and a washing water jet. It is equipped with a cleaning nozzle. The cleaning nozzle has a rotating shaft into which cleaning water flows, a plurality of flow paths having injection ports, and a water diversion mechanism for switching the supply of cleaning water to the plurality of flow paths. The water diversion mechanism is configured to be arranged above the axis of rotation.

According to this configuration, the water diversion mechanism is arranged above the rotation axis. As a result, it is not necessary to increase the rotation axis of the cleaning nozzle in the vertical direction. Similarly, the bearing portion fitted to the rotating shaft does not need to be large. Therefore, it is not necessary to arrange the tableware basket provided in the washing tank at a high position. As a result, the amount of items to be washed such as tableware stored in the tableware basket can be increased. As a result, more objects to be cleaned can be stored in the tableware basket, and the objects to be cleaned can be reliably washed while saving water.

Further, the washing nozzle of the dishwasher of the present invention is provided with an arm portion that rotates horizontally below the dishwasher and a tower portion that is provided so as to project upward at the center portion of the arm portion, and has a water diversion mechanism. It may be arranged in the portion. According to this configuration, the water diversion mechanism is configured as a part of the tower section. Therefore, the water diversion mechanism can be arranged above the rotation axis.

Further, the tower portion of the dishwasher of the present invention may be provided with a plurality of injection ports, and the water distribution mechanism may be configured to switch the supply of washing water to the plurality of injection ports. According to this configuration, the washing water can be sprayed from a high position of the tower portion. As a result, the cleaning range to the upper part of the cleaning tank can be expanded in particular. Further, the water diversion mechanism can switch the injection port to limit the amount of washing water to be sprayed. As a result, the amount of water used can be suppressed, and the cleaning power can be improved while saving water.

Further, the water diversion mechanism of the dishwasher of the present invention may be configured to have a timing in which the washing water is not supplied to any of the plurality of injection ports. According to this configuration, it is possible to increase the amount and pressure of the washing water flowing into the arm portion at the timing when the washing water is not sprayed from the injection port provided in the tower portion. As a result, the amount and momentum of the washing water ejected from the arm portion increases. As a result, the form of the cleaning water sprayed on the object to be cleaned changes, and the cleaning power is improved.

Further, the arm portion of the dishwasher of the present invention has a plurality of injection ports and an arm flow path communicating with the injection port, and the water diversion mechanism does not stop the supply of washing water to the arm flow path. It may be configured. According to this configuration, the washing water is constantly sprayed from below the tableware basket while the washing pump is being driven. Therefore, the detergency from below by the washing water is maintained.

Further, the water diversion mechanism of the dishwasher of the present invention has a valve body that moves up and down depending on the presence or absence of water pressure of the washing water pumped by the washing pump, a water diversion space where the valve body moves up and down, and a valve body that moves up and down. It has an engaging portion that rotates the valve body by a predetermined angle. The valve body may be configured to rotate each time it moves up and down to switch the supply of wash water to a plurality of injection ports. According to this configuration, it is not necessary to separately provide an actuator such as a motor for driving the valve body. Therefore, control of a motor or the like becomes unnecessary. As a result, a simple configuration of the water diversion mechanism becomes possible.

Further, the water diversion mechanism of the dishwasher of the present invention may be configured so that the washing water flowing into the washing nozzle from the rotating shaft passes through the water diversion space. According to this configuration, the washing water applies a large water pressure to the valve body to raise and rotate the valve body. Therefore, the flow path can be reliably switched by the raised valve body.

Further, in the dishwasher of the present invention, a part of the washing water flowing into the washing nozzle passes through the diversion space toward the injection port of the tower portion, and the rest does not pass through the diversion space and goes to the injection port of the arm portion. It may be configured to go to.

As described above, in the dishwasher of the present invention, a water diversion mechanism having a diversion space in which the valve body moves up and down is arranged at a position above the rotation axis and above the arm flow path. At this time, if all the washing water passes through the diversion space, the washing water flowing into the arm flow path becomes a U-turn path in the diversion space, and the flow path resistance increases. Therefore, the washing pump requires a large force to pump the washing water. However, according to the above configuration, the washing water flowing into the arm flow path does not pass through the diversion space, so that the flow path resistance is suppressed. As a result, it is possible to configure a washing pump having a small force for pumping the washing water. As a result, the cleaning pump can be miniaturized and energy can be saved.

Further, the tower portion of the dishwasher of the present invention has an injection port portion provided with a plurality of injection ports, and the injection port portion may be detachably arranged on the tower portion. According to this configuration, the tower portion can replace the injection port portion having the injection port having different injection characteristics. As a result, the object to be cleaned can be cleaned with an appropriate cleaning force according to the shape and depth of the cleaning tank, the layout of the tableware basket, etc., while keeping the arm portion and the water diversion mechanism of the cleaning nozzle having the basic configuration. In addition, by sharing the basic configuration, development costs and component costs can be suppressed. Further, the user can remove the injection port portion from the tower portion and perform maintenance such as cleaning of the injection port of the tower portion on a daily basis. As a result, it is possible to suppress a decrease in the cleaning power of the cleaning nozzle.

Further, in the dishwasher of the present invention, the plurality of injection ports of the tower portion may have different opening shapes. According to this configuration, the washing water is sprayed from each injection port in different directions and in different spread ranges. As a result, the washing water can be evenly sprayed onto the upper part of the washing tank to wash more effectively.

Further, the dishwasher basket of the present invention includes a lower basket and an upper shelf basket, and the upper shelf basket may be configured to be horizontally movable. According to this configuration, when the object to be cleaned is set in the lower basket, even if the object to be cleaned is set in the upper shelf basket, the object to be cleaned can be set in the lower basket by laterally moving the upper shelf basket.

Further, the upper shelf basket of the dishwasher of the present invention further includes an auxiliary basket. The auxiliary car is rotatably supported by the upper shelf car, and is held in an upright state or in a tilted state on the upper shelf car. It may be configured as possible. According to this configuration, the auxiliary car can be inverted and the object to be cleaned can be placed on the auxiliary car by laterally moving the upper shelf car. As a result, a larger amount of the object to be washed can be stored in the washing tank.

Since the dishwasher according to the present invention can accommodate more objects to be washed than the conventional dishwasher and can surely wash while saving water, it can be applied to a washing machine other than the dishwasher.

1,25b Main body 1a Door 1aa Handle 2,52 Cleaning tank 2a, 22, 59a Opening 3 Lid 4,51 Tableware basket 5 Cleaning object 6,53 Cleaning pump 7,54 Cleaning nozzle 8 Drain port 8a Residual filter 9 Heater 10 Water supply valve 11 Temperature sensor 12,55 Arm part 13 Tower part 14 First arm nozzle (arm nozzle)
14a Communication part 14b First arm flow path (arm flow path)
15 2nd arm nozzle (arm nozzle)
15a 2nd rotation shaft 15b 2nd arm flow path (arm flow path)
16,56 Rotating shaft 16a Shaft opening 17 First injection port (injection port)
18 Second injection port (injection port)
19 Tower nozzle 19a Injection port 19b Flow flow part 20,58 Water diversion mechanism 20a Outer side wall 20b Inner side wall 20c Rib 20d Water diversion space 20e Gap 21 Tower flow path (flow path)
21a 1st tower flow path 21c 3rd tower flow path 23 Tower injection port (injection port)
23a 1st tower injection port 23b 2nd tower injection port 23c 3rd tower injection port 24,59 Valve body 25 Disk part 25a Cushioning part 26 Hollow cylindrical part 27 Flow part 28 Support shaft 28a Root 30 Top surface engaging part 30a, 31a Inclined Surfaces 30b, 31b Vertical surface 31 Bottom engagement part 32 Upper sliding part 33 Lower sliding part 41 Lower car 42 Upper shelf car 43 Accessory case 44 Sliding member 45 Rail member 45a Groove 46 Auxiliary car 54a, 54b Injection port 55a, 55b Entrance part 57 Tower nozzle 59b Closing part 60 Engaging part

Claims (9)

A tableware basket on which the object to be washed is placed,
The washing tank in which the tableware basket is housed and
A washing pump that pumps washing water and
Equipped with a cleaning nozzle that sprays cleaning water,
The cleaning nozzle is
The rotating shaft into which the wash water flows and
An arm portion that rotates horizontally around the axis of rotation below the tableware basket,
A tower portion protruding above the arm portion and a tower portion
It has a water diversion mechanism disposed in the tower portion above the rotation axis and above the upper surface of the arm portion .
The tower portion includes a plurality of tower injection ports and a plurality of tower flow paths communicating with the plurality of tower injection ports.
The arm portion is provided with a plurality of arm injection ports and an arm flow path communicating with the arm injection port on the upper surface, and the arm portion and the arm flow path are oriented in the left-right direction about the rotation axis in a plan view and a side view. Extension to
The water diversion mechanism switches the supply of wash water to the plurality of tower flow paths, and does not stop the supply of wash water to the arm flow paths, but cleans the arm flow paths extending to the left. A dishwasher configured to supply wash water to either the left or right arm flow path without switching between water supply and wash water supply to the arm flow path extending to the right . The dishwasher according to claim 1, wherein the water diversion mechanism is configured to have a timing in which washing water is not supplied to any of the plurality of tower injection ports. The water diversion mechanism
A valve body that moves up and down depending on the presence or absence of water pressure of the washing water pumped by the washing pump,
The diversion space where the valve body moves up and down and
It has an engaging portion that rotates the valve body by a predetermined angle by moving the valve body up and down.
The dishwasher according to claim 1 or 2, wherein the valve body rotates each time it moves up and down to switch the supply of washing water to the plurality of tower flow paths. The water diversion mechanism
The dishwasher according to claim 3, wherein the washing water flowing from the rotating shaft into the washing nozzle is configured to pass through the diversion space. A part of the washing water flowing into the washing nozzle passes through the diversion space and heads toward the tower injection port, and the rest goes to the arm injection port without passing through the diversion space. The dishwasher according to claim 3. The tower portion has an injection port portion provided with the plurality of tower injection ports.
The dishwasher according to claim 1, wherein the injection port portion is detachably arranged on the tower portion. The dishwasher according to claim 1, wherein the plurality of tower injection ports have different opening shapes. The tableware basket includes a lower basket and an upper shelf basket.
The dishwasher according to claim 1, wherein the upper shelf basket is configured to be movable laterally. The upper shelf cage further includes an auxiliary cage.
The auxiliary car
Along with being rotatably supported by the upper shelf car, it is held in the upper shelf car in an upright state or in a collapsed state.
The dishwasher according to claim 8, wherein the dishwasher is configured to be able to be inverted in the space created by the movement of the upper shelf basket after the upper shelf basket is moved laterally.

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