JP2011224234A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the following problem that since the spraying reaction force of washing water sprayed from an spray opening of a tower nozzle 16 is produced at a position very close to the rotation center, the produced torque is small and this increases the amount of washing water sprayed only for the rotation of a washing nozzle 7 and reduces the amount of washing water sprayed on dishes.SOLUTION: The washing nozzle 7 includes: a washing nozzle channel 15; the tower nozzle 16 provided vertically upward at the substantially central part; and a rotating shaft 14 with a valve body 19 built therein. The tower nozzle 16 has multiple channels provided with spray openings. The washing nozzle 7 can implement the following by washing water sprayed from the washing nozzle channel 15 by switching the channels through the valve body 19: it is rotated and further it sprays washing water from the spray openings of the tower nozzle 16 onto a washed object 3, such as dishes, to be washed. Thus even when the amount of water sprayed from the washing nozzle 7 and the tower nozzle 16 is reduced, it is possible to enhance the washing capability and efficiently spray washing water over a wide range.

Description

  The present invention relates to a dishwasher for washing dishes using washing water.

  Conventionally, this type of dishwasher has a configuration as shown in FIG. 11 (see, for example, Patent Document 1). Hereinafter, the configuration will be described. As shown in the figure, a tableware basket 51 for storing tableware, a cleaning tank 52 for placing the tableware basket 51, a cleaning pump 53 for pumping cleaning water, and a bottom surface of the cleaning tank 52 for pumping cleaning water. A cleaning nozzle 54 having a plurality of nozzle holes that spray while rotating in the vicinity, a tower nozzle 55 having a fixed nozzle hole extending upward from a substantially central portion of the cleaning nozzle 54, water supply to the cleaning nozzle 54, and a tower nozzle By providing the diversion switching means 56 for switching the water supply to 55, the water supply to the cleaning nozzle 54 and the water supply to the tower nozzle 55 are divided so that each can be operated individually. The amount of water used for the washing process with the tower nozzle 55 can be suppressed, and the washing efficiency can be improved.

JP 2008-73131 A

  However, in the conventional dishwasher, it is necessary to rotate the washing nozzle even when the tower nozzle is jetted. However, since the tower nozzle is provided at a substantially central portion, the reaction force of the washing water jetted from the jet nozzle of the tower nozzle. Occurs at a very close distance from the center of rotation, and the generated rotational moment is small, so that the amount of cleaning water sprayed only for the rotation of the cleaning nozzle increases and the amount of cleaning water sprayed on the tableware is reduced. there were.

  The present invention solves the above-described conventional problems, and always switches from a plurality of flow paths provided in the tower nozzle by a valve body provided in the cleaning nozzle and also from an injection port provided in the cleaning nozzle. By adopting a structure that injects water, it is possible to provide an injection port at a position away from the rotation center, so that cleaning water is injected from the cleaning nozzle and tower nozzle while rotating the cleaning nozzle itself by the reaction force of the injection. It is an object of the present invention to provide a dishwasher capable of reliably washing an object to be washed with a rotating tower nozzle while saving water.

  In order to solve the above-described conventional problems, the dishwasher of the present invention is provided with a washing tank for storing an object to be washed, a washing pump for pressurizing washing water, and provided in the washing tank and pressurized by the washing pump. A cleaning nozzle that injects cleaning water onto an object to be cleaned, the cleaning nozzle includes a tower nozzle that protrudes above a substantially central portion, and the cleaning nozzle extends upward at a substantially central portion. And a tower nozzle having a plurality of tower nozzle passages each having a plurality of injection ports, a rotating shaft that rotatably supports the cleaning nozzle in the cleaning tank, and a plurality of injection ports that communicate with the rotating shaft and are provided. The valve body provided in the rotating shaft switches the supply of cleaning water to the plurality of tower nozzle channels.

As a result, the plurality of tower nozzles provided in the respective flow paths are switched while the plural flow paths provided in the tower nozzles that are not communicated with the cleaning nozzle flow paths are switched by the valve bodies provided in the cleaning nozzles. In addition to spraying the cleaning water from the mouth, it is possible to always spray the cleaning water to the object to be cleaned such as tableware from the cleaning nozzle flow path, even if the amount of water sprayed from the cleaning nozzle flow path is suppressed The rotation of the cleaning nozzle can be ensured, and the cleaning performance can be improved.

  The dishwasher according to the present invention switches the tower nozzle flow path for injecting wash water with the valve body to spray the wash water uniformly over the entire washing tank and constantly from the wash nozzle flow path. By spraying the cleaning water, it becomes possible to provide an injection port at a position away from the rotation center, and a large rotational moment due to the injection reaction force can be obtained, so the cleaning water sprayed only for the rotation of the cleaning nozzle Can be reduced. Accordingly, the object to be cleaned can be reliably cleaned by the rotating tower nozzle while saving water.

Main sectional drawing of the dishwasher of Embodiment 1 of the present invention Partial sectional view when the washing nozzle of the dishwasher is viewed from above Sectional view of part of the washing nozzle and valve body of the dishwasher Perspective view of the main part of the bearing part of the dishwasher Perspective view of the valve body of the dishwasher Perspective view of the valve body of the dishwasher Top view of the valve body of the dishwasher viewed from above Plan view of the valve body of the dishwasher viewed from below Partial sectional view of the vicinity of the valve body of the dishwasher Plan view when the valve body of the dishwasher closes the second tower nozzle passage inlet Main sectional view of a conventional dishwasher

  A first aspect of the present invention is a cleaning tank that contains an object to be cleaned, a cleaning pump that pressurizes cleaning water, and a cleaning nozzle that is provided in the cleaning tank and injects the cleaning water pressurized by the cleaning pump onto the object to be cleaned The cleaning nozzle is provided with a plurality of tower nozzle channels each having a plurality of injection ports, and the cleaning nozzle can be rotated to the cleaning tank. And a cleaning nozzle passage that is in communication with the rotation shaft and provided with a plurality of injection ports, and the valve body provided in the rotation shaft is connected to the plurality of tower nozzle passages. It is a dishwasher that switches the supply of washing water. With this configuration, while the plurality of flow paths provided in the tower nozzle are switched by the valve provided in the cleaning nozzle, the cleaning water is always sprayed from the injection port provided in the cleaning nozzle flow path. Since it is possible to provide an injection port at a position away from the center, the amount of water ejected from the cleaning nozzle by jetting the cleaning water from the cleaning nozzle and the tower nozzle while rotating the cleaning nozzle itself by the reaction force of the injection Even if it suppresses, rotation of a washing nozzle can be secured and washing performance can be improved.

  According to a second aspect of the present invention, in the first aspect of the invention, in particular, the valve body rotates together with the cleaning nozzle within the rotation shaft, and a plurality of tower nozzle flows are linked to changes in the water pressure of the cleaning water supplied from the cleaning pump. This is a dishwasher that switches the supply of washing water to the road. With this configuration, a valve body can be provided in the rotating cleaning nozzle, and the flow path of the tower nozzle in the cleaning nozzle can be switched. Therefore, when the water pressure of the washing water supplied from the washing pump is high, the valve body switches the flow path, and at the same time, the washing nozzle and the valve body rotate together, and when the water pressure is low or not, washing is performed. At the same time as the rotation of the nozzle is stopped, the valve body is separated from the tower nozzle flow path in the cleaning nozzle, so that the flow path in the rotating cleaning nozzle can be switched stably.

  A third invention is a dishwasher according to any one of the first and second inventions, and in particular, the total opening areas of the plurality of injection ports respectively included in the plurality of tower nozzle flow paths are substantially equal to each other. With this configuration, even if the valve body switches the flow path of the tower nozzle, the opening area of the cleaning nozzle flow path and the injection nozzle of the tower nozzle are almost the same. Washing water having a pressure and an injection flow rate can be supplied to objects to be cleaned such as tableware.

  In addition, although the total opening area of the tower nozzle injection port is the same, each tower nozzle injection port can change the opening area and injection position, so the injection pressure and injection flow of the cleaning water from the cleaning nozzle flow path are While maintaining stable performance, the cleaning water for each flow path sprayed from the tower nozzle improves the cleaning efficiency by adjusting the number of injection ports, the strength of the injection pressure, and the amount of injection. Can be made.

  According to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, in particular, the tower nozzle passage inlet at the boundary between the rotating shaft and the tower nozzle passage has washing water flowing between the rotating shaft and the washing nozzle passage. The dishwasher is formed inside the cleaning nozzle flow path inlet at the boundary. With this configuration, the valve body can be reduced in size. Therefore, the rotating shaft can be reduced in size, and the cleaning nozzle can also be reduced.

  According to a fifth invention, in any one of the first to fourth inventions, in particular, the tower nozzle has first and second tower nozzle flow paths formed therein, and the first and second tower nozzle flows. In the dishwasher, the total opening area of the plurality of ejection openings provided in the passage is smaller than the total opening area of the plurality of ejection openings provided in the cleaning nozzle flow path. With this configuration, switching the many injection ports provided in the tower nozzle increases the contact efficiency between the cleaning water injected from the tower nozzle and the object to be cleaned such as tableware, so the injection flow rate from the tower nozzle is reduced. Even if cleaning performance is secured. Therefore, without increasing the total flow rate of the cleaning water sprayed from the tower nozzle and the cleaning nozzle, it is possible to increase the spraying flow rate and the number of spraying ports of the cleaning nozzle channel in which the trajectory of the spraying port is provided in a wide range. It becomes possible, and it can wash | clean uniformly and efficiently as the whole washing tank.

(Embodiment 1)
1 is a main cross-sectional view of the dishwasher according to the first embodiment, FIG. 2 is a partial cross-sectional view showing a plane of a washing nozzle of the dishwasher, and FIG. 3 is a partial view of the washing nozzle and valve body of the dishwasher. It is sectional drawing.

  4 and 5 are perspective views of the main part of the dishwasher, FIG. 6 is a perspective view of the valve body of the dishwasher, and FIG. 7 is a plan view of the valve body of the dishwasher from above. FIG. 8 is a plan view of the valve body of the dishwasher as viewed from below, and FIG. 9 is a partial sectional view of the vicinity of the valve body of the dishwasher.

  1 to 9, a washing tub 2 having an opening for taking in and out an object to be cleaned is provided inside the dishwasher main body 1, and the opening of the cleaning tub 2 is opened and closed by a door. An object to be cleaned 3 such as tableware is set in a tableware basket 4 and accommodated in the cleaning tank 2. The tableware basket 4 has an upper stage and a tableware basket provided respectively at the upper and lower parts in the cleaning tank 2. The water supply valve 5 supplies cleaning water to the cleaning tank 2. The cleaning pump 6 pressurizes the cleaning water, supplies it to the cleaning nozzle 7, and jets the cleaning water from the cleaning nozzle 7 to clean the article 3 to be cleaned. At the bottom of the cleaning tank 2, there is a drain port 8 communicating with the suction side of the cleaning pump 6 through a water channel. The drain port 8 has a drain filter 9 for collecting residue, and an opening smaller than the drain filter 9. A remnant filter 10 is provided. A heating means 11 (for example, a PTC heater or a sheathed heater) for heating the cleaning water is provided on the bottom surface of the cleaning tank 2, and a temperature sensor 12 that detects the temperature of the cleaning water or air in the cleaning tank 2 is cleaned. It is provided on the bottom outer wall of the tank 2.

  The cleaning nozzle 7 is fitted into a rotary bearing 13 provided at the bottom of the cleaning tank 2 and rotates around the rotary bearing 13. The rotating shaft 14 has a flow path inside. Further, the cleaning nozzle 7 forms a cleaning nozzle flow path 15 symmetrically with respect to the rotation axis 14, and the cleaning nozzle flow is formed at the boundary between the flow path of the rotation shaft 14 and the cleaning nozzle flow path 15. There is a passage inlet 17, which communicates with the cleaning nozzle passage inlet 17. The cleaning nozzle flow path 15 has a plurality of cleaning nozzle injection ports 18.

  As shown in FIG. 2, the flow path of the rotating shaft 14 is illustrated with a first tower nozzle flow path inlet 30 and a second tower nozzle flow path inlet 31 separated from each other by a substantially cross-shaped rib as a boundary. 1. The first tower nozzle passage 28 and the second tower nozzle passage 29 shown in FIG. The first tower nozzle flow path 28 and the second tower nozzle flow path 29 respectively have a first tower nozzle injection port 32 and a second tower nozzle injection port 33. The first tower nozzle injection port 32 and the second tower nozzle injection port 33 each include a plurality of injection ports. Each of the first tower nozzle channel inlet 30 and the second tower nozzle channel inlet 31 has a fan-shaped opening having a central angle of approximately 90 degrees.

  Next, FIG. 4 is a perspective view of a main part of the dishwasher according to the present embodiment, specifically, a perspective view in the vicinity of the rotary shaft 14.

  As shown in FIG. 4, the rotary shaft 14 has a rotary shaft side engaging portion 26 at the lower portion of the inner wall. The rotary shaft side engaging portion 26 is formed in a spiral shape, and includes a plurality of inclined surfaces 26a inclined in one direction and a plurality of vertical step portions 26b connecting the inclined surfaces 26a.

  As shown in FIGS. 5 to 9, the valve body 19 includes two opening portions 20 that are substantially right-angled cutout portions and two closed portions 21 having flat end portions that are substantially right-angled diagonally at the center point. And is disposed within the rotating shaft 14. The valve body 19 provided in the rotating shaft 14 has a hollow cylindrical portion 34 projecting downward at the center of rotation, and each of the opening 20 and the closed portion 21 is diagonally centered on the hollow cylindrical portion 34. is doing. Further, as shown in FIGS. 3 and 9, a support shaft 27 is formed on the side of the cleaning nozzle channel inlet 17 and the tower nozzle channel inlets 30 and 31 of the cleaning nozzle 7 so as to protrude downward. It is inserted into the cylindrical portion 34. When the valve body 19 rises, the support shaft 27 serves as a guide portion for the raising operation of the valve body 19.

  The support shaft 27 may be configured by a rib having a cross section. By being configured with a cross-shaped rib, a space is formed between the hollow cylindrical portion 34 and the inflowing foreign matter is easily discharged out of the hollow cylindrical portion 34.

  A mountain-shaped upper surface engaging portion 24 is formed on the upper surface of the closing portion 21, and an inclined lower surface engaging portion 25 is formed on the lower surface near the outer peripheral edge of the closing portion 21.

  Further, when the cleaning pump 6 is operated, the flow path of the cleaning nozzle flow path inlet 17 or the tower nozzle flow path inlets 30, 31 configured in a cross shape with the upper surface engaging portion 24 from the middle of the valve body 19 rising. The valve body 19 is rotated while being lifted up by the sliding of the partition wall partitioning the valve. When the cleaning pump 6 is stopped, the lower surface engaging portion 25 and the rotary shaft side engaging portion 26 slide, so that the valve body 19 rotates while descending from the middle. Since the shaft opening 22 of the rotating shaft 14 communicates with the discharge side of the cleaning pump 6, the cleaning water can be continuously supplied.

Further, the tower nozzle 16 is provided in a substantially central portion of the cleaning nozzle 7 so as to extend vertically upward, and the first tower nozzle flow path inlet 30 and the second tower nozzle flow path inlet 31 are formed by the tower nozzle 16. The first tower nozzle flow path 28 and the second tower nozzle flow path 29 provided with the first tower nozzle injection port 32 and the second tower nozzle injection port 33, respectively. Communicating with Here, each tower nozzle channel is separated from the cleaning nozzle channel 15 by a partition wall.

  In the above configuration, first, the basic operation of the dishwasher will be described.

  An object to be cleaned 3 such as tableware is set in a tableware basket 4 and stored in the washing tub 2, and after the detergent is put in, the opening of the dishwasher main body 1 is closed by the door, and the operation is started. A cleaning process for removing dirt on the object to be cleaned 3, a rinsing process for flowing the attached detergent and residue, and a drying process for drying the water suitable for the object to be cleaned 3 are performed in this order.

  First, the water supply valve 5 is operated to supply a predetermined amount of cleaning water to the cleaning tank 2, and then the cleaning water is pressurized by the cleaning pump 6, and the cleaning water is jetted from the cleaning nozzle 7. At this time, the heating means 11 provided in the cleaning tank 2 is energized, and the cleaning process is performed while heating the cleaning water. The temperature sensor 12 detects the temperature of the cleaning water in the cleaning tank 2 and stops energizing the heating means 11 when the temperature becomes equal to or higher than a predetermined temperature. The circulation of the washing water passes through the drainage filter 9 and the residual filter 10, is sucked into the washing pump 6, and is supplied from the washing pump 6 toward the washing nozzle 7 provided at the inner bottom portion of the washing tank 2. The cleaning water pumped from the cleaning pump 6 flows into the rotary shaft 14 from the shaft opening 22 of the rotary shaft 14.

  The valve body 19 receives the water pressure of the cleaning water that has flowed in by the driving of the cleaning pump 6 on the lower surface of the valve body 19, and starts to rise. The opening 20 of the body 19 coincides, and at the same time, the second tower nozzle flow path inlet 31 and the closing part 21 of the valve body 19 coincide to close the inlet. At this time, regardless of the switching operation of the valve body 19, the cleaning nozzle channel inlet 17 is always open, and the cleaning water flowing in from the shaft opening 22 is also supplied to the cleaning nozzle channel 15.

  The wash water flowing in from the first tower nozzle flow path inlet 30 passes through the first tower nozzle flow path 28 and jets the wash water from the jet port 32 of the first tower nozzle to the object to be cleaned 3. At the same time, the cleaning water flowing in from the cleaning nozzle channel inlet 17 passes through the cleaning nozzle channel 15 and jets the cleaning water from the cleaning nozzle injection port 18 so that the cleaning nozzle 7 rotates.

  When the predetermined injection time ends, the cleaning pump 6 is stopped by the control means, and after the predetermined time, the cleaning pump 6 is operated so that the valve body 19 opens the second tower nozzle channel inlet 31. The opening 20 of the valve body 19 is made coincident. The washing water that has passed through the second tower nozzle flow path 29 is ejected from the ejection port 33 of the second tower nozzle toward the object to be cleaned 3 and is also ejected from the cleaning nozzle ejection port 18. This switching operation is repeated for a predetermined time.

  The configuration, switching operation, and operation of the valve body 19 will be described. As shown in FIGS. 5 to 9, the closing portion 21 of the valve body 19 has a substantially planar shape, and constitutes the first and second tower nozzle channel inlets 30 and 31 and the cleaning nozzle channel inlet 17. The substantially planar surface A and the valve body 19 abut. When the cleaning pump 6 is operated, the valve body 19 receives the water pressure of the cleaning water flowing in from the shaft opening 22 of the rotating shaft 14 at the lower surface of the closing portion 21 and starts to rise. And the inclined part of the upper surface engaging part 24 shown in FIG. 5 slides on the cross-shaped partition provided in order to separate each flow path in the washing nozzle 7, and the valve body 19 rotates substantially vertically. As shown in FIG. 6, the closing portion 21 of the valve body 19 is closed opposite to the second tower nozzle channel inlet 31, and the opening 20 is the first tower nozzle channel inlet 30. And the cleaning nozzle channel inlet 17 is opened.

The cleaning pump 6 continues to operate for a predetermined time, and the valve element 19 is fixed in contact with the surface A at a position where the first tower nozzle flow path inlet 30 and the cleaning nozzle flow path inlet 17 are opened. Washing water is supplied to the passage inlet 30 and the washing nozzle passage inlet 17. At this time, the valve body 19 rotates with the cleaning nozzle 7. As shown in FIG. 6, the upper surface engaging part 24 is provided so that the opening part 20 of the valve body 19 provided in the position through which the washing water passes coincides with a predetermined flow path inlet.

  The upper surface engaging portion 24 has a shape inclined in the rotation direction, and the valve body 19 rotates by a first predetermined angle (for example, 45 degrees) by the inclination of the upper surface engaging portion 24 while rising. Subsequently, when the washing pump 6 is temporarily stopped, the water pressure that has pushed the valve body 19 up from below does not act, so the valve body 19 falls by its own weight. At this time, the lower surface engaging portion 25 slides along the inclined surface 26a of the rotating shaft side engaging portion 26 provided on the rotating shaft 14 shown in FIG. 4, and the valve body 19 is moved to the second predetermined angle. Descent while rotating (eg 45 degrees). When the lower surface of the lower surface engaging portion 25 of the valve body 19 and the rotating shaft side engaging portion 26 come into contact with each other at the step portion 26b, the valve body 19 stops.

  When the cleaning pump 6 is operated again, the upper surface engaging portion 24 engages with the next fitting portion, the valve body 19 rises while rotating, abuts against the surface A, and is the second flow path inlet. Washing water is supplied to the tower nozzle passage inlet 31 and the washing nozzle passage inlet 17. Thus, by operating the cleaning pump 6 intermittently, the first and second tower nozzle channel inlets 30 and 31 through which the cleaning water flows can be sequentially switched.

  That is, the valve body 19 is rotated by 90 degrees by moving forward and backward, that is, by reciprocating up and down once, and is rotated by switching the first and second tower nozzle flow path inlets 30 and 31. Then, the valve body 19 returns to its original position by reciprocating up and down twice. Therefore, it is not necessary to separately provide an actuator such as a motor for switching the valve body 19, and there is no obstacle other than the valve body 19 in the flow path of the rotary shaft 14, and the cleaning nozzle 7 and the valve body 19 can rotate together.

  The cleaning water is sprayed from the cleaning nozzle spray port 15 and the spray nozzles of the tower nozzles, and is performed through a path in which the object to be cleaned 3 is cleaned and then returned to the drain port 8 again. At this time, the residue or the like dropped off from the object to be cleaned 3 flows into the residue filter 10 together with the cleaning water, and the residue having a size that cannot pass through the filter is collected by the residue filter 10.

  When the cleaning process for a predetermined time is completed, the cleaning water containing dirt is discharged outside the apparatus, and new cleaning water is supplied. The cleaning pump 6 is operated, and the cleaning water is sprayed again from the cleaning nozzle 7 and the tower nozzle 16 to rinse the object 3 to be cleaned such as detergent and leftovers. After the operation for a predetermined time, the operation of discharging the cleaning water and supplying the cleaning water again is repeated, and this rinsing process is continuously performed about three times. Finally, the washing water is discharged out of the dishwasher body 1 and the rinsing process is completed.

  Subsequently, a drying process is performed, and after a predetermined time of operation, the operation is terminated.

  Therefore, the cleaning nozzle 7 can always inject the cleaning water from the cleaning nozzle injection port 18 during the cleaning time independently of the switching of the flow path of the tower nozzle 16, so that the rotation of the cleaning nozzle 7 can be secured. The tower nozzle 16 can inject cleaning water from injection ports provided in a plurality of flow paths, and a large number of injection ports for cleaning water having different angles, water pressures, and amounts of water to the object to be cleaned 3 such as tableware. Therefore, the penetration into the part having poor penetration is improved, and by repeating these, unevenness in the cleaning power can be eliminated and the entire washing tank 2 can be washed uniformly. Conventionally, the cleaning conditions such as the cleaning time were determined according to the place where the cleaning power is weak, but the cleaning power is improved by eliminating the unevenness of the cleaning power and increasing the cleaning power of the weak part of the cleaning power, Efficient cleaning is possible, such as shortening the cleaning time.

Further, the flow path switching by the valve body 19 has been described with respect to the embodiment in which the cleaning pump 6 is driven and stopped. However, by changing the number of rotations of the motor that drives the cleaning pump 6, The water pressure may be changed. The valve body 19 switches the cleaning water supply to the plurality of flow paths in the tower nozzle 16 in conjunction with the change in the pressure of the cleaning water supplied from the cleaning pump 6, so that the valve body is placed in the rotating cleaning nozzle 7. 19 can be provided, and the flow path of the tower nozzle 16 in the cleaning nozzle 7 can be switched. Therefore, when the water pressure of the cleaning water supplied from the cleaning pump 6 is high, the valve body 19 switches the flow path, and at the same time, the cleaning nozzle 7 and the valve body 19 rotate as one body. At the same time as the rotation of the nozzle 7 is almost stopped, the valve element 19 is separated from the tower nozzle passage inlet and the washing nozzle passage inlet 17 in the washing nozzle 7, so that the passage in the rotating washing nozzle 7 can be switched stably. Can do.

  Further, the total opening area of the plurality of injection ports respectively included in the plurality of flow paths formed in the tower nozzle 16 may be configured to be substantially equal to each other. With this configuration, even if the valve body 19 switches the flow path of the tower nozzle 16, the total opening areas of the cleaning nozzle flow path 15 and the injection nozzle of the tower nozzle 16 are substantially the same. From the injection port, it is possible to supply cleaning water having the same injection pressure and injection flow rate to an object to be cleaned such as tableware.

  Moreover, although the total opening area of the injection port of the tower nozzle 16 is the same, since each injection port provided in the tower nozzle 16 can change an opening area and an injection position, respectively, the washing water from the washing nozzle flow path 15 is changed. While maintaining a stable performance with a constant injection pressure and injection flow rate, the jet of washing water from the tower nozzle 16 adjusts the number of injection ports, the strength of the injection pressure, and the amount of injection. Cleaning efficiency can be improved.

  The first and second tower nozzle channel inlets 30 and 31 through which the cleaning water is supplied from the rotary shaft 14 to the tower nozzle 16 are supplied with the cleaning water from the rotary shaft 14 to the cleaning nozzle channel 15. It may be formed on the inner side of the surface A and on the support shaft 27 side from the cleaning nozzle flow path inlet 17 through which the nozzle passes. FIG. 10 is a plan view when the valve body 19 of the dishwasher according to the present embodiment closes the second tower nozzle flow path inlet. When the tower nozzle flow path inlets 30 and 31 are formed outside the surface A from the cleaning nozzle flow path inlet 17, each of them is smaller than the opening area of the drainage filter 9 shown in FIG. Since a width that passes through the channel inlet is required, the channel inlet provided on the outer side of the surface A can have a longer circumference than the channel inlet provided on the inner side, and the minimum opening area of the channel cross section can be increased. Can do. When the opening area is large, the flow rate of the cleaning water flowing increases, and the cleaning performance is improved. However, the spray nozzle of the cleaning nozzle flow path 15 is more suitable for the tableware basket 4 than the spray nozzle of the tower nozzle 16. Since it has an injection trajectory over a wide range, the cleaning efficiency is improved by providing the cleaning nozzle flow path inlet 17 on the outside. Moreover, since the valve body 19 should just switch each tower nozzle flow path inlet provided inside the surface A, the outer diameter of the opening part 20 and the closing part 21 can be made small.

  With this configuration, the valve body 19 can be reduced in size. Therefore, the rotating shaft 14 can be reduced in size, and the cleaning nozzle 7 can also be made smaller.

The tower nozzle 16 includes first and second tower nozzle channels 28 and 29, and is a total of the plurality of injection ports 32 and 33 provided in the first and second tower nozzle channels 28 and 29. The opening area may be smaller than the total opening area of the cleaning nozzle injection port 18. With this configuration, by switching a plurality of flow paths provided in the tower nozzle 16, cleaning water can be sprayed from a large number of injection ports, and the cleaning water sprayed from the tower nozzle 16 and the object to be cleaned 3 such as tableware Since the contact efficiency is increased, the cleaning performance can be ensured even if the injection flow rate from the tower nozzle 16 is reduced. In the present embodiment, by making the total opening area of the cleaning nozzle injection port 18 larger than the total opening area of the injection port of each tower nozzle, the flow rate of the cleaning water injected from the cleaning nozzle injection port 18 and the number of injection ports The cleaning performance of the cleaning nozzle 7 is also improved. Since the total flow rate of the cleaning water sprayed from the tower nozzle 16 and the cleaning nozzle channel 15 does not increase, the entire cleaning tank can be cleaned uniformly and efficiently without increasing the amount of water used.

  The present invention relates to a washing method for a dishwasher, and does not limit the shape and size of the dishwasher body 1, the arrangement of dishes, the arrangement of individual components, and the like.

  As described above, the dishwasher according to the present invention is capable of jetting washing water from a plurality of jet nozzles of the tower nozzle by switching the tower nozzle flow path, and improving the washing performance. It is useful as a machine.

  Furthermore, it becomes possible to spray the cleaning water uniformly over the object to be cleaned in the entire cleaning tank in a wide range and at a high density, and the setability of the object to be cleaned can be improved.

6 Washing pump 7 Washing nozzle 10 Residual filter 14 Rotating shaft 15 Washing nozzle flow path 16 Tower nozzle 17 Washing nozzle flow path inlet 18 Washing nozzle injection port 19 Valve element 28 First tower nozzle flow path 29 Second tower nozzle flow Path 30 First tower nozzle flow path inlet 31 Second tower nozzle flow path inlet 32 First tower nozzle injection port 33 Second tower nozzle injection port

Claims (5)

A cleaning tank for storing an object to be cleaned; a cleaning pump for pressurizing cleaning water; and a cleaning nozzle that is provided in the cleaning tank and injects the cleaning water pressurized by the cleaning pump onto the object to be cleaned. ,
The cleaning nozzle is provided at a substantially central portion so as to extend upward and has a plurality of tower nozzle passages each having a plurality of injection ports, and the cleaning nozzle can be rotated to the cleaning tank. A rotating shaft to be supported, and a cleaning nozzle flow path that is in communication with the rotating shaft and is provided with a plurality of injection ports.
The valve body provided in the rotating shaft is a dishwasher that switches supply of washing water to the plurality of tower nozzle channels. The valve body rotates together with the cleaning nozzle within the rotation shaft, and switches the supply of cleaning water to the plurality of tower nozzle channels in conjunction with a change in the water pressure of the cleaning water supplied from the cleaning pump. Item 10. A dishwasher according to Item 1. The dishwasher according to claim 1 or 2, wherein a total opening area of the plurality of jet nozzles respectively included in the plurality of tower nozzle channels is substantially equal to each other. The tower nozzle flow path inlet at the boundary between the rotating shaft and the tower nozzle flow path is formed inside the cleaning nozzle flow path inlet at the boundary between the rotary shaft and the cleaning nozzle flow path. The dishwasher according to any one of claims 1 to 3. The tower nozzle has first and second tower nozzle channels formed therein, and a total opening area of a plurality of injection ports provided in the first and second tower nozzle channels is the washing The dishwasher of any one of Claims 1-4 currently formed smaller than the total opening area of the some injection nozzle provided in the nozzle flow path.