JP2009089968A - dishwasher - Google Patents

Abstract

A cleaning nozzle having one or a plurality of discharge paths is divided by a plurality of water distribution means to perform effective cleaning, and the water distribution means and the valve body provided therein can be easily attached and detached from the inside of the cleaning tank. Like that.
The cleaning water from the cleaning pump 8 is selectively distributed by supplying water to one or a plurality of discharge passages 33 to 35 of the plurality of cleaning nozzles 12 and 13 simultaneously or at different times, The diversion means 14 includes a diversion valve chamber 133, a diversion passage 48 having an outflow passage 36 to 38 connected to the valve chamber 133 and communicating with the discharge passages 33 to 35, and wash water flowing into the valve chamber 133. The water diversion passage 48 is formed integrally with the outflow passages 36 to 38 and removed from the washing tank 4 to remove the valve body 32 from the washing tank 4. The above-mentioned object is achieved by making it detachable from inside 4.
[Selection] Figure 7

Description

  The present invention relates to a dishwasher for washing dishes, and more specifically, a dishwasher body having an opening at the front, and a washing tub provided so as to be freely drawn out from the dishwasher body and having an opening upward. A dish pump housed in the washing tank, on which an object to be cleaned such as dishware is placed, a washing pump for pressurizing washing water, and a washing nozzle for supplying the washing water pressurized by the washing pump and ejecting the washing water It is related with the dishwasher provided with.

  This type of dishwasher is called a so-called built-in type, and the dishwasher body is configured in a single casing as seen in Patent Document 1 below, or kitchen furniture such as a sink as seen in Patent Document 2 below. Is provided as an integral part of the system.

In any case, this type of dishwasher has a feature that the capacity is easily increased as compared with the placement type, and is suitable for washing a large amount of dishes at once. For washing dishes, washing water pressurized by a washing pump is sprayed over a wide area with rotation from a large rotary washing nozzle that has a rotation center at the approximate center of the bottom of the washing tank as seen in Patent Documents 1 and 2. It is done by doing. The washing water injection condition is generally set optimally in consideration of the relationship with the arrangement direction of tableware.
JP 2005-73992 A Japanese Patent Laid-Open No. 6-169821

  However, these types of dishwashers have recently been required to save water and reduce washing time for energy saving and speedy processing. It is difficult to guarantee the optimal cleaning results at all times due to the fact that the conditions cannot be fully regulated to match the optimal settings, the processing amount varies, and the cleaning conditions on the tableware vary from time to time. It has become to.

  In order to cope with this, it is conceivable to increase the cleaning capability by increasing the number of cleaning nozzles and their discharge paths. On the other hand, in order to make a plurality of cleaning nozzles and a plurality of discharge paths that may be provided to work in combination, it is necessary to divide the cleaning liquid from the cleaning pump into each discharge path provided in the cleaning nozzles. In this case, if the water is divided at the same time, the total amount of water for circulating the wash water increases and the running cost rises, but the pressure drops or the combined jets interfere with each other for cleaning. It is conceivable that the efficiency decreases. This can be done by distributing water to multiple cleaning nozzles and discharge paths at different times, but a valve structure that performs water distribution is essential, and the water distribution structure is complicated by the increase in the number of cleaning nozzles and discharge paths. Therefore, it is preferable that foreign matters such as scale adhere easily and can be washed as much as possible, and the number of times of valve switching increases, so replacement in the unlikely event is desired.

  An object of the present invention is to have a pull-out type cleaning tank from an opening at the front, and to perform effective cleaning by dividing a cleaning nozzle having one or a plurality of discharge paths by a plurality of water distribution means. In addition to the above, it is an object of the present invention to provide a dishwasher capable of easily attaching and detaching the water distribution means and the valve body provided therein from the inside of the washing tank.

  In order to achieve the above object, a dishwasher of the present invention includes a dishwasher body having an opening at a front portion thereof, a washing tub provided so as to be freely drawn out from the dishwasher body, and having an opening upward. , A dish that is housed in the washing tank and on which objects to be washed such as dishes are placed, a washing pump that pressurizes washing water, and washing water pressurized by the washing pump is selectively supplied to a plurality of discharge paths A water distribution means for supplying, and a plurality of cleaning nozzles having one or more of the discharge paths and for injecting the cleaning water from the injection port to the object to be cleaned, the water distribution means communicating with the cleaning pump A valve chamber forming an inflow portion; a diversion passage having a plurality of outflow passages connected to the valve chamber and communicating with the plurality of discharge passages; and wash water flowing in the valve chamber provided therein. Switch the runoff channel to selectively divert water The water diversion passage is integrally provided with at least one of the plurality of outflow passages, and the valve body is removed by removing the water diversion passage from the cleaning tank. It is assumed that it can be detached from the cleaning tank.

  According to such a configuration, when the washing pump is driven after supplying water to the washing tub of the dishwasher body, the washing pump sucks and pressurizes the washing water in the washing tub and sends it to the water dividing means. Since water is selectively supplied to one or a plurality of discharge paths of a plurality of cleaning nozzles through a plurality of outflow paths at the same time or at different times, the plurality of cleaning nozzles and one or more of them are provided. By selectively combining the cleaning action by the discharge path, cleaning water can be ejected from a plurality of nozzle positions in various patterns into the cleaning tank to clean the object to be cleaned placed in the tableware basket. .

  In addition, the diversion passage can be detached from the washing tank and mounted integrally with the one in which at least one of the plurality of outflow passages is integrally formed, so that it is independent of the valve chamber even if the entire plurality of outflow passages are provided. Thus, it can be washed and reused with both ends of the outflow passage open. Further, the valve chamber is opened in the washing tank by removing the water diversion passage, and the valve body therein can be removed and accommodated from the washing tank.

  The valve body has an outflow path for diverting the wash water flowing in from the inflow section by moving forward and backward and rotating between the inflow section of the valve chamber and the plurality of outflow paths of the diversion passage. It can be configured to switch.

  In such a configuration, selective water splitting at the same time or at different times can be sequentially advanced by a simple repetitive operation of the advancement / retraction of the valve body and the rotational movement. In addition, the valve body is advanced and retracted by the pressure of the washing water from the washing pump and the pressure is released. You can do it respectively.

  The water diversion passage may be fitted from above into a recess at the bottom of the cleaning tank, and the valve chamber may be provided at the bottom of the recess.

  In such a configuration, in order to allow the valve chamber and the water diversion passage to be attached and detached from the cleaning tank, the water diverting means largely protrudes into the cleaning tank and prevents a dead space from occurring due to other obstacles. be able to.

  Moreover, the said water diversion channel | path can make the upper surface position into the height relationship substantially equivalent to the bottom part of an adjacent washing tank.

  In such a configuration, there is no step between the water distribution means and the bottom of the washing tank, so that it is prevented from getting caught during cleaning and being damaged by external force. Can do.

  The valve chamber may be formed integrally with the bottom of the cleaning tank.

  With such a configuration, the number of parts and assembly man-hours can be reduced.

  According to the dishwasher of the present invention, the washing water can be placed in the plurality of nozzle positions by selectively combining the action of the plurality of washing nozzles and the action of the one or more discharge passages provided thereto simultaneously or at different times. Can be sprayed into the cleaning tank in various patterns, and the diversity of the total injection area, total injection density, and direction of the cleaning water can be increased. If the injection modes that interfere with each other are selectively executed so that they are different from each other, the cleaning effect is not reduced and the waste of injection can be saved. For this purpose, a non-rotating cleaning nozzle that can be used as a priority for cleaning with a specific cleaning nozzle and a specific discharge route, and that corresponds to a cleaning week point that tends to occur due to differences in specifications such as the arrangement of dishes, is supplemented. It is preferable to adopt. Moreover, the running water can be reduced by reducing the total amount of water necessary for the circulation according to the ratio of performing the diversion to the plurality of discharge paths at the same time, and the pressure loss is further reduced.

  In particular, the water diversion passage can be easily removed from the washing tank integrally with at least one of the plurality of outflow passages, and the both ends of the outflow passages can be opened and washed with water. By removing the diversion passage, the valve body can also be easily removed from the washing tank for maintenance such as cleaning, repair, and replacement, and the complicated passage structure and valve structure can be kept clean for a long period of time, and complicated switching operations can be performed. It is easy to ensure the normal function of the disc.

  Hereinafter, a dishwasher according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10 for understanding of the present invention. Note that the following description is a specific example of the present invention and does not limit the contents described in the scope of claims.

  A dishwasher 100 according to the present embodiment schematically shown in FIG. 1 is provided with a dishwasher main body 2 having an opening 1 at a front portion thereof, and is freely detachable from the dishwasher main body 2, and opens upward. 3 and a washing tub 4 accommodated in the washing tub 4 and placed on an object to be washed such as tableware, and the like, and the washing water is pressurized by driving in the washing direction and used for washing, or A cleaning / drainage pump 8 that drains by driving in the direction of drainage, and a rotary cleaning nozzle 12 having a rotation center 11 positioned at the center of the bottom 4a of the cleaning tank 4 is washed with the cleaning water pressurized by the cleaning / drainage pump 8. 1 of the non-rotating cleaning nozzle 13 provided in at least one of the one or a plurality of discharge paths, the rear wall 4b1 of the four peripheral walls 4b of the cleaning tank 4, the side walls 4b2, 4b3 on both sides, and the front wall 4b4. One or more discharges And a selectively supplying water diversion unit 14 on the road. Instead of the cleaning / drainage pump 8, a dedicated pump for cleaning and draining may be employed. Thereby, the installation of piping and pumps for cleaning and the arrangement of piping and pumps for drainage can be optimally designed individually.

  As a result, when the washing / drainage pump 8 is driven in the washing direction after supplying water to the washing tub 4 of the dishwasher main body 2, the washing / drainage pump 8 sucks and pressurizes the washing water in the washing tub 4 and supplies it to the water distribution means 14. Send it out. Since the water dividing means 14 selectively supplies water to one or a plurality of discharge paths of the rotary cleaning nozzle 12 and one or a plurality of discharge paths of the non-rotary cleaning nozzle 13 simultaneously or at different times. The conventional rotary cleaning nozzle 12 is disposed at the center of the bottom 4a of the cleaning tank 4 with the rotation center 11, the rear wall 4b1 of the four peripheral walls 4b of the cleaning tank 4, and one of the side walls 4b2, 4b3 on both sides. , When selectively working with at least one of the front wall 4b4 and the non-rotating cleaning nozzle 13 newly provided, or when selectively operating the rotating and non-rotating cleaning nozzles 12 and 13, In combination with selectively working a plurality of discharge paths that may be provided in the cleaning tank, the cleaning water is washed in various patterns from a plurality of nozzle positions on the bottom 4a and the four peripheral walls 4b of the cleaning tank 4 in various patterns. It can is jetted to clean the cleaning object placed on the tableware basket 6,7 within.

  As a result, the rotary cleaning nozzle 12 having the rotation center 11 at the substantially central portion of the bottom 4a of the cleaning tank 4 and the non-rotational cleaning nozzle 13 provided on at least one of the four peripheral walls 4b of the cleaning tank 4 are respectively present. By selectively switching and supplying the cleaning water to one or a plurality of discharge paths, the rotary and non-rotating cleaning nozzles 12 and 13 are prepared by selectively combining the functions of the rotating and non-rotating cleaning nozzles. In addition, a selective combination of the functions of a plurality of discharge paths that may be generated can be added, so that the cleaning water can be ejected into the cleaning tank 4 from a plurality of nozzle positions in various patterns. Since the diversity of spray density and wash water spray direction increases, the cleaning efficiency can be increased by spraying with no blind spots, and the spray modes that interfere with each other can be selectively executed so that they are different times. Is do not reduce, waste can be saved of the injection. For this purpose, it is preferable to use a non-rotating washing nozzle as a supplementary measure for the washing week point where the washing with the rotating washing nozzle is given top priority and is expected or tends to be caused by the difference in specifications such as tableware arrangement. is there. Moreover, the running water can be reduced by reducing the total amount of water necessary for the circulation according to the ratio at which the water is divided into the plurality of discharge paths at different times, and the pressure loss is further reduced.

  After cleaning, when the cleaning / drainage pump 8 is rotated in the direction of drainage, residual water from the rotary cleaning nozzle 12 and the non-rotating cleaning nozzle 13 is drained through the water distribution means 14 along with the drainage of the cleaning water in the cleaning tank 4. Then drain.

  In addition, one of the four peripheral walls 4b along which the cleaning / drainage pump 8 of the cleaning tank 4 extends is the rear wall 4b1, the side walls 4b2, 4b3, and the like, and is drawn in by a configuration facing the pipe drawing surface such as the outer wall or partition wall of the house. The piping length from the position to the cleaning / drainage pump 8 is shortened, and the four-circumferentially biased side of the cleaning / drainage pump 8 at the rear wall 4b1, the side walls 4b2, 4b3, and the front wall 4b4 is close to the retracting position. By doing so, the pipe length is further shortened. Further, if the washing / drainage pump 8 is provided near the front of the side walls 4b2, 4b3 or along the front wall, the washing / drainage pump 8 is close to the opening 1 of the dishwasher main body 2. The installation and maintenance work of the drainage pump 8 is facilitated.

  In order to execute these, in the present embodiment, the dishwasher main body 2 uses the water storage part 4e as an area not reaching the rotary cleaning nozzle 12 of the bottom part 4a of the cleaning tank 4, and supplies water to the water storage part 4e. A water supply valve 23, a heater 25 disposed in the water reservoir 4e, a drain recess 4e1 for draining water from the water reservoir 4e, a fan heater 27 for drying tableware for sending warm air into the washing tank 4, and a drain recess 4e1. A connected water level sensor 28 and the like are provided, and these are driven in a timely manner by the control means 31 to sequentially control the steps of washing, rinsing and drying. In the dishwasher according to the present invention, the drying process is not essential. Further, as will be described in detail below, the water diversion means 14 is a valve body 32 that selectively supplies cleaning water in response to driving of the cleaning / drainage pump 8, pressurization of cleaning water by driving stop, and release of pressurization. The direct control by the control means 31 is unnecessary. However, the method of operation and control is not particularly limited, and for example, it may be switched and driven by a dedicated actuator such as a motor.

  The water diversion means 14 provided in the dishwasher main body 2 of the present embodiment is shown in FIGS. 2 to 5, and includes a valve chamber 133 that forms an inflow portion that communicates with the washing / drainage pump 8, and an upper portion of the valve chamber 133. In the illustrated example, the two discharge paths 34 and 35 shown in FIGS. 2, 4, and 6 provided in the rotary cleaning nozzle 12, and the non-rotary cleaning nozzle 13 are discharged. A plurality of outflow passages 36 and 37 communicating with the passage 36, an outflow passage 38, and wash water that is provided in the valve chamber 133 and that flows in is selectively divided into the plurality of outflow passages 36, 37, and 38. And the valve body 32 to be switched. Further, the non-rotating cleaning nozzle 13 is shown only from the connection end 13a as shown in FIG. 1 from the connection end 13a to the water diversion means 14 near the bottom 4a of the cleaning tank 4 as shown in FIG. It is assumed that at least one of a rising portion passing through a horizontal portion and a horizontal portion 13c passing through a rising portion 13b as illustrated in FIG. 1 from the connection end 13a is provided. In addition, an example of the cleaning / drainage pump 8 is shown in FIG. 7, but one of the rear wall 4b1, the side wall 4b2, 4b3 on both sides of the four peripheral walls 4b of the cleaning tank 4, and one of the front walls 4b4, In the example, the rear wall 4b1 is provided along one side in the four circumferential directions, in the specific example, along a position closer to the left side toward the rear, and the valve chamber 133 is concentric with the rotation center 11 of the rotary washing nozzle 12 in the water dividing means 14. The outlet port corresponding to the connecting port 12a, specifically, the rotating support part 41 that connects the outlet channels 36 and 37 at the outlet ports 36a and 37a and rotatably supports them, and the connection end of the non-rotating washing nozzle 13 13a is connected to each outflow channel 36, 37, 38 at a position between the outflow channel corresponding to 13a, specifically, the outflow channel 42 connecting the outflow channel 38, and the outflow channels 36a, 37a are used for washing and draining. The pump 8 along One of the peripheral wall 4b, specifically it is assumed in the adjacent wall, concrete adjacent the side of the one close to the rear wall 4b1 which is positioned in the vicinity of the left side wall 4b3 in the rear.

  As a result, the cleaning / drainage pump 8 is located at one of the rear wall 4b1 of the four-round wall 4b of the cleaning tank 4, one of the side walls 4b2, 4b3, and one of the front walls 4b4, at one side in the four-round direction. In the water distribution means 14, a rotation support portion 41 that rotatably supports the rotary cleaning nozzle 12 is positioned substantially at the center of the bottom portion 4 a of the cleaning tank 4 and is connected to the connection end 13 a of the non-rotational cleaning nozzle 13. For example, the outlet 42 is positioned in the vicinity of, for example, the adjacent wall 4b2 that is adjacent to the rear wall 4b1, which is one of the four peripheral walls 4b along which the cleaning / drainage pump 8 extends, on the one side in the circumferential direction. The cleaning / drainage pump 8, the water distribution means 14, and the rotation support portion 41 and the outlet 42 thereof have a diagonal line connecting the substantially central rotation center 11 of the bottom portion 4 a of the cleaning tank 4 and one corner 43. 1/4 area The valve chamber 133 located between the rotation support part 41 and the outlet 42 is connected to the cleaning / drainage pump 8 from a position closer to the rotation support part 41 in the ¼ area A. In addition, the rotation support part 41 and the outlet 42 are connected to the connection port 12a of the rotary cleaning nozzle 12 and the connection end 13a of the non-rotational cleaning nozzle 13 in the ¼ area A, and the bottom of the cleaning tank 4 The cleaning / drainage is performed with respect to the rotating cleaning nozzle 12 having the rotation center 11 positioned substantially at the center of 4a and at least one of the four peripheral walls 4b of the cleaning tank 4, specifically, the non-rotating cleaning nozzle 13 provided on the rear wall 4b1. Wash water can be supplied by a short pipe and passage length from the pump 8.

  As a result, the cleaning / drainage pump 8, the water distribution means 14 for selectively supplying the cleaning water, and the rotation support portion 41 and the outlet 42 of the cleaning / drainage pump 8 are approximately 1 on the one corner 43 side of the bottom 4 a of the cleaning tank 4. / 4 Within the area A, the piping structure is simple and not bulky, and the entire dishwasher 100 is reduced in size, weight, and cost. Further, the valve chamber 133 is connected to the cleaning / drainage pump 8 from a close position, and the rotation support portion 41 and the outlet 42 are connected to the rotary cleaning nozzle 12 and the non-rotational cleaning nozzle 13 in the ¼ area A. Therefore, with a short connection passage, in addition to the short pipe, the responsiveness of switching the diversion to driving / stopping of the cleaning / drainage pump 8 can be improved, and pressure loss can be suppressed, improving cleaning efficiency, cleaning This is advantageous for shortening the time. In addition, the running water can be reduced by reducing the total amount of water required for the circulation according to the ratio of dividing water into the plurality of discharge paths at different times, and the cleaning efficiency due to pressure loss can also be prevented.

  In the illustrated example, the rotation support portion 41, the valve chamber 133, and the outflow port 42 are arranged substantially in a straight line as shown in FIGS. 2 and 7, and the outflow port 42 is washed and drained in the vicinity of the adjacent wall 4b2. The horizontal portion 13c located near the pump 8 and passing through the rising portion 13b from the connection end 13a of the non-rotating cleaning nozzle 13 is one along which the cleaning / drainage pump 8 of at least the four peripheral walls 4b extends. It is assumed that the rear wall 4b1 is provided with an injection port 44 for ejecting cleaning water at least in the horizontal portion 13c.

  Thus, the rotation support part 41, the valve chamber 133, and the outflow port 42 are arranged substantially in a straight line, so that the outflow paths 36 and 37 from the valve chamber 133 to the rotation support part 41 and the outflow path toward the outflow port 42 are provided. 38, the valve chambers 133 extend in opposite directions as seen in FIG. 2, and there are a plurality of outflow passages extending in the opposite directions, such as outflow passages 36 and 37 directed to the rotation support portion 41. By using half of the circumference in the circumferential direction in plan view, it is possible to switch the outflow passages 36, 37, 38, etc. by the valve body 32 by individually communicating with each other within a necessary range without expansion around the valve chamber 133. . Further, the arrangement of the cleaning / drainage pump 8, the water diverting means 14, the rotation support portion 41 thereof and the outlet 42 is equivalent to the ¼ region A as much as the outlet 42 is closer to the cleaning / drainage pump 8 side. The distance between the valve chamber 133 and the cleaning / drainage pump 8 is further shortened, and the horizontal portion 13c passing through the rising portion 13b from the connection end 13a of the non-rotating cleaning nozzle 13 is at least provided on the four-wall 4b. The connection distance when the cleaning / drainage pump 8 is provided along one side is shortened, and the horizontal 13c is extended to two, three, and four of the four peripheral walls 4b, or from the rising portion 13b to both sides in the circumferential direction. It can cope with the case of branching.

  Moreover, the rotation support part 41 and the connection port 12a of the rotary cleaning nozzle 12 are vertically connected above the bottom part 4a of the cleaning 4 as shown in FIGS. Thereby, the rotary cleaning nozzle 12 can connect the connection port 12a on the bottom portion 4a of the cleaning tank 4 to the rotation support portion 41 without being obstructed from the vertical direction. Further, the outlet 42 and the connection end of the rising portion 13 b are connected vertically above the bottom of the cleaning tank 4. As a result, the non-rotating cleaning nozzle can also be connected at its connecting end 13a on the bottom 4a of the cleaning tank 4 to the outflow port 42 from the vertical direction without being obstructed elsewhere.

  The rotary cleaning nozzle 12 of the present embodiment further rotates in the normal direction due to the difference in the discharge paths 36 and 37 that are selectively supplied from the water distribution means 14 according to the drive control of the cleaning / drainage pump 8. And can be switched to reverse. Various specific methods for this are conceivable, but it is possible to use the jet energy from the jet 44 of the wash water.

  Further, as shown in FIG. 7, the valve chamber 133 in the water distribution means 14 has a connection port 133 b extending to the cleaning / drainage pump 8 side, which is substantially opposite to the rotation support portion 41, The cleaning / drainage pump 8 and the bottom of the cleaning tank 4 are connected to each other on the opposite side of the radial direction passing through the rotation center 46. Correspondingly, the portion of the peripheral wall 4b provided so that the cleaning / drainage pump 8 of the bottom 4a of the cleaning tank 4 is along, in the illustrated example, corresponding to the installation range of the cleaning / drainage pump 8 along the rear wall 4b1. A swelled portion 4f is provided, and a cleaning / drainage pump 8 is installed in a space 47 below the bulging portion 4f. A dead space is generated around the cleaning tub 4 due to the installation of the cleaning / drainage pump 8. Is preventing. This also prevents the dishwasher main body 2 from becoming large.

  Here, the water distribution means 14 will be described in detail. The water diversion means 14 includes the above-described valve chamber 133 that forms an inflow portion that communicates with the cleaning / drainage pump 8, and a plurality of the diversion means 14 that are provided on the valve chamber 133 and communicate with the plurality of discharge paths 33, 34, and 35. The diversion passage 48 having the outflow passages 36, 37, and 38, and a valve provided in the valve chamber 133 for selectively diverting the inflowing wash water into the plurality of outflow passages 36, 37, and 38. The water diversion passage 48 is integrally formed with at least one of the plurality of outflow passages 36, 37, and 38, and the water diversion passage 48 is removed from the cleaning tank 4, The valve body 32 is detachable from the cleaning tank 4. As a result, water flow cleaning of the outflow passages 36, 37, and 38, maintenance of the valve body 32 itself, and cleaning of the valve body 32 and the valve chamber 133 are facilitated, and a complicated passage structure and valve structure portion are cleaned for a long period of time. It is easy to ensure the normal function of the valve body 32 that performs a complicated switching operation. Specifically, as shown in FIG. 3, the water diversion passage 48 integrally forms a plurality of outflow passages 36, 37, 38 by ultrasonic welding or the like of the upper and lower half shells, and the whole is shown in FIG. 3. As shown in FIG. 4 and FIG. 7, the concave portion 49 provided in the bottom portion 4 a of the cleaning tank 4 is fitted so as to be detachable from above, and is mounted in a state where there is no step with the bottom portion 4 a. A valve chamber 133 having an opening 133a is fixed to the connection port 49a of the attached water diversion passage 49 so that the connection port 49a can be attached and detached through the seal packing 51 in the vertical direction. As a result, the valve chamber 133 and the water diversion passage 48 can be detached from the cleaning tank 4, so that the valve chamber 133 and the water diversion passage 48 are largely protruded into the cleaning tank 4 and do not become a dead space. In particular, if the water distribution means and the bottom portion 4a of the cleaning tank 4 adjacent to the water distribution means have substantially the same height relationship, they will be caught during cleaning and may interfere with work or be damaged by external force. Can be prevented. The seal packing 51 is mounted around the outer periphery of the connection port 48a so as to seal between the inner periphery of the opening 133a, but may be mounted on the inner peripheral side of the opening 133a.

  The valve body 32 advances and retreats and rotates between the inflow portion of the valve chamber 133 and the plurality of outflow passages 36 and 37.38 of the water diversion passage 48, so that the washing water flowing in from the inflow portion is discharged into the plurality of outflows. The discharge paths 33, 34 and 35 for discharging through the paths 36, 37 and 38 are switched. For this purpose, as shown in FIGS. 3 and 8A, the connection port 48 a of the diversion passage 48 is individually and maintained from the valve chamber 133 to the three outflow passages 36, 37, 38 in the diversion passage 48. The four water diversion openings 48a1 to 48a4 are divided into equal sizes around the rotation center 46 of the valve body 32 by radial ribs 48a5, and as shown in FIG. 8 a 2 communicates with the outflow path 36, the diversion opening 48 a 3 communicates with the outflow path 37, and the diversion opening 48 a 4 communicates with the outflow path 38.

  As shown in FIG. 3, the valve body 32 is rotatable about a guide shaft 60 provided integrally with the bottom of the valve chamber 133 and moves up and down to move up and down with respect to the connection port 48 a of the water diversion passage 48. A disc-shaped one that is separated from and coming in the direction, and a 1/4 range around the rotation center 46 that opens any one of the water diversion openings 48a1 to 48a4 by rotation around the guide shaft 60 when contacting the connection port 48a. Is formed as shown in FIGS. 8B and 8D. As a result, the valve body 32 contacts the connection port 48a having a plurality of water diversion openings 48a1 to 48a4 at a predetermined rotational position in response to the presence or absence of the washing water pressure due to the driving / stopping of the washing / drainage pump 8. The water distribution position where the specific one is passed through the water supply part 32a by blocking other than the specific one in contact, and the water distribution openings 48a1 to 48a4 apart from the connection port 48a are not opened. The valve body 32 is moved up and down between the non-water-dividing position, and the rotational position at which the valve body 32 closes the water-dividing openings 48a1 to 48a4 is changed with the reciprocation between the water-dividing position and the non-water-dividing position. Thus, the upper cam pair 61 and the lower cam pair 62 work alternately.

  More specifically, the lower cam pair 62 is serrated cams 62a and 62b that mesh with each other, and both have guide conditions for stabilizing the valve body 32 at each 1/4 rotation position. On the other hand, the upper cam pair 61 is a chevron cam 61a and a radial cam 61b formed by the lower end of the rib 48a5 that partitions the water diversion ports 48a1 to 48a4, and the valve body 32 is washed from the non-water diversion position that has been stabilized by the lower cam pair 62. When pushed up by water pressure, the slope of the chevron cam 61a abuts from the midway position of the radial cam 61b and has a function of stabilizing the valve body 32 by rotating it less than 1/4 times to the water distribution position. When the valve body 32 is dropped from the water splitting position, the serrated cams 62a and 62b of the lower camta pair 62 are engaged with each other at a midway position between the teeth, and the valve body 32 is rotated by less than 1/4 turn by the upper cam pair 61. It has a function to rotate and stabilize the rest up to 1/4 rotation.

  As a result, the valve body 32 is rotated by less than ¼ rotation from the stable rotational position before the upward movement every time the valve body 32 moves upward to the water diversion position, and the valve body 32 once moves up to the water diversion position and then falls. The meshing position of the pair 62 is changed so as to be stabilized to the next 1/4 rotation position. As a result, one of the plurality of water distribution openings 48a1 to 48a4 is sequentially opened, and water is distributed from the water distribution opening 48a1 to the discharge path 33 of the rotary cleaning nozzle 12 through the outflow path 36 of the rotary cleaning nozzle 12, Water splitting from the water splitting opening 48a2 to the discharge path 33 of the rotary cleaning nozzle 12 via the outflow path 36 of the rotary cleaning nozzle 12, water splitting from the water splitting opening 48a3 to the discharge path 34 via the outflow path 37, water splitting opening 48a4 Water distribution to the discharge path 35 of the non-rotating cleaning nozzle 13 through the outflow path 38 is sequentially repeated.

  Here, in the control in which the control means 31 keeps the driving time between the stoppage of the cleaning / drainage pump 8, the cleaning liquid from the cleaning / drainage pump 8 is discharged from the discharge path 36 of the rotary cleaning nozzle 12 through the diversion openings 48 a 1, 48 a 2. The cleaning liquid from the cleaning / drainage pump 8 is supplied to the discharge path 37 of the rotary cleaning nozzle 12 through the diversion opening 48a3 by supplying the rotary cleaning nozzle 12 twice and rotating the rotary cleaning nozzle 12 forward for cleaning. This is twice as long as the time for reversing the time and supplying to the discharge path 35 of the non-rotating cleaning nozzle 13 from the water diversion opening 48a4 through the outflow path 38 and for cleaning.

  This is because the cleaning water sprayed from the rotary cleaning nozzle 12 can easily reach the concave portion on the inner side where the food of the tableware is placed. For example, as illustrated in FIG. 9, the bottom 4a of the cleaning tank 4 of the rotary cleaning nozzle 12 The inner side of the tableware 72 is opposed to each other with a straight line 71 passing through the rotation center 11 located substantially at the center and perpendicular to the two peripheral walls 4b1, 4b4 of the cleaning tank 4 facing each other. In contrast to the optimal design of the tableware basket 6 so that it is placed in a symmetric orientation, the spraying conditions and the like so that the optimally arranged tableware 72 and the like are sufficiently cleaned by the forward rotation of the rotary cleaning nozzle 12 This corresponds to the optimal design.

  In other words, normal rotation cleaning of the rotary cleaning nozzle 12 is usually sufficient, but cleaning to a weak point caused by shortening the cleaning time, increasing the amount of objects to be cleaned, variation in the arrangement of objects to be cleaned, etc. The auxiliary is supplemented by reverse cleaning, so that cleaning can be performed in a shorter time and without remaining. 9, when the tableware basket 6 is designed so that one side of the tableware 72 arranged symmetrically so that the inside faces each other is large and the other side is small, in the case shown in FIG. When the tableware on the front side is large and the tableware on the rear side is small, a space is formed above the area where the small tableware is arranged. In this space, a table basket 7 is provided in the washing tank 4 as shown in FIG. However, it is difficult and wasteful to make this tableware basket area the proper cleaning range of the rotary cleaning nozzle 12, and this is used as a weak point of the rotary cleaning nozzle 12 and the cleaning load of the rotary cleaning nozzle 12. The non-rotating cleaning nozzle 13 described above can be assisted mainly by the horizontal portion 13c, and the injection port 44 is within a range corresponding to the tableware basket 7 of the rising portion 13b. To enhance the cleaning of the auxiliary function by providing. In this sense, it is preferable that the horizontal portion 13c extends to the side wall 4b3 opposite to the side wall 4b2 provided with the rising portion 13b, and it is also possible to extend to the front wall 4b4. Due to such an auxiliary function of cleaning, the horizontal portion 13c is strongest on the entire periphery of the four peripheral walls 4b, and is provided separately from the extending portion of the horizontal portion 13c on both sides in the circumferential direction. In this case, if the height of the horizontal portion 13c branched to both sides and the extension path are made different, the difference in the cleaning load differs depending on the location in the height direction and the plane direction in the wide cleaning area in the cleaning tank 4. It is easy to cope with.

  However, in the illustrated example, the water distribution through the four water distribution openings 48a1 to 48a4 is made such that the number of the discharge paths 35 of the non-rotating cleaning nozzle 13 is one, and the existing discharge path 33 is used. , 34, 35, and the added four parts, when the cleaning / drainage pump 8 is driven and controlled, the water splitting time to the discharge path 33 of the rotary cleaning nozzle 12 and the rotary cleaning nozzle 12 are controlled. The discharge path 34, the discharge path 35 of the non-rotating cleaning nozzle 13 and the water distribution time to the additional discharge path are the same.

  However, the rotation direction is switched between forward rotation and reverse rotation depending on the difference between the discharge paths 33 and 34 of the rotary cleaning nozzle 12 which is selectively supplied from the water diversion means 14 according to the drive control of the cleaning / drainage pump 8. In this case, the control means 31 can freely control the driving of the cleaning / drainage pump 8 so that the normal rotation time and the reverse rotation time are in a predetermined ratio. For this purpose, the control means 31 may control the ratio between the normal rotation time and the reverse rotation time of the rotary cleaning nozzle 12 according to the ratio of the respective drive times during the normal rotation and reverse rotation of the cleaning / drainage pump 8. In the relationship where the cleaning effect does not change between forward rotation and reverse rotation, the normal rotation time and the reverse rotation time can be set to be equal.

  However, the ratio of the diversion time from the discharge passages 36, 37, 38, the additional portion and the additional portion, and the corresponding diversion openings 48 a 1 to 48 a 4 and the additional portion is determined by the control means 31. It can be set and controlled freely according to the ratio of the driving time of the washing / drainage pump 8 with the diversion control.

  In the case of controlling the ratio between the forward rotation time and the reverse rotation time of the rotary cleaning nozzle 12, a rotation direction detection unit of the rotary cleaning nozzle 12 is provided, and the control unit 31 rotates the rotation direction between the forward rotation and the reverse rotation. Based on the output from the detection means, the normal rotation time and the reverse rotation time can be controlled to have a predetermined ratio.

  In addition, separately, a water flow detection means for detecting the flow of the cleaning water supplied to the two discharge paths 33 and 34 is provided, and the control means 31 is provided with a water flow detection means for the forward rotation and the reverse rotation of the rotary cleaning nozzle 12. Based on the output, the forward rotation time and the reverse rotation time can be controlled to be a predetermined ratio.

  In addition, a valve body position detecting means for detecting the supply water switching position of the cleaning water to the two discharge paths 33 and 34 via the two outflow paths 36 and 37 of the valve body 32 is provided. Based on the output from the valve body position detection means at the time of forward rotation and reverse rotation of the nozzle 12, the forward rotation time and the reverse rotation time can be controlled to be a predetermined ratio.

  In the illustrated example, the water distribution means 14 further rotatably supports the connection port 12a of the rotary cleaning nozzle 12 by the rotation support portion 41 at one end of the water distribution passage 48, thereby showing two outflow passages 36 and 37. As shown in FIG. 2, in order to communicate with the two discharge paths 33, 34 arranged so as to cross between the both ends of the rotary cleaning nozzle 12 and cross at the rotation center axis 11 portion in plan view, around the rotation center 11. The flow outlet 37a from the outflow path 37 to the discharge path 37 and the outflow path 36a from the outflow path 36 to the discharge path 33 are arranged in a flow having a concentric inner and outer double passage structure around the rotation center 11 as shown in FIG. The outlets 36 a and 37 a are opened in the rotation support portion 41, and the inlets 12 a 1 and 12 a 2 of the discharge passages 33 and 34 are connected as inlets 12 a 1 and 12 a 2 having a concentric inner and outer double passage structure around the rotation center 11. The outlets 36a and 37a are connected to the inlets 12a1 and 12a2 by opening the opening 12a and connecting the connecting port 12a to the rotation support portion. The inlets 12a1 and 12a2 of the inner and outer double passage structures are connected to the discharge path. In plan view with the discharge paths 33 and 34 in the cross region 33 and 34, the two introduction portions 12 a 3 and 12 a 4 that are arranged in a point-symmetrical manner around the rotation center 11 are communicated with each other. As a result, the flow of the cleaning water during the water splitting from the outflow path 36 of the diversion passage 48 to the discharge path 33 of the rotary cleaning nozzle 12 also passes from the outflow path 37 of the diversion path 48 to the discharge path 34 of the rotary cleaning nozzle 12. The flow of cleaning water during water separation is stable without pulsation or disturbance due to the inner and outer double passage structure concentric with the center of rotation, regardless of the rotation of the rotary cleaning nozzle 12 and the difference in the rotation position. As a result, a substantially uniform laminar flow state around the rotation center 11 is introduced into each of the discharge passages 33 and 34, and the rotation center in the cross region around the rotation shaft 11 is introduced to each of the discharge passages 33 and 34. 11 is introduced without breaking the rotational balance of the rotary cleaning nozzle 12 through the two introduction communicating portions 12a3 and 12a4 each having a point-symmetrical arrangement with the center of 11 as the center. The vibration or pulsation rotated stably without such irregular rotation, the cleaning effect is not or cause uneven by the rotation position lowered by the rotation. For this purpose, it is preferable that the passage cross-sectional areas for dividing water from the outflow passages 36 and 37 to the discharge passages 33 and 34 are designed to be equal to each other.

  Further, as shown in FIG. 4, the rotation support portion 41 has a diversion passage 48 having the rotation support portion 41 extending from the extending path range B extending along the bottom portion 4 a of the cleaning tank 4 in a lateral direction from the valve chamber 133. An upward bending path range C bent toward the rotation center direction is formed, and at least the outer corner C1 side of the bending circuit range C has a curved shape, for example, a smooth curved shape without a sudden change in curvature, and the curved shape. It has a curved height region H for As a result, the wash water divided into the outflow passages 36 and 37 of the diversion passage 48 is directed upward upward without any turbulence through the smooth bending path range C from the lateral circuit range B. The inlet 12a1 is smoothly guided toward the outflow ports 36a and 37a that form a concentric inner / outer double passage structure at the rotation center 11 of the rotation support portion 41, and also forms an inner / outer double passage structure that is also vertical and concentric with the rotation center 11. , 12a2 flows straight up without any collision, bias or disturbance, and is introduced into the discharge passages 33, 34 through the introduction communication ports 12a3, 12a4 in a balanced manner around the rotation center 11, so that the rotation balance of the rotary cleaning nozzle 12 is balanced. , Stability is further improved. For example, if the cross-sectional shape of the diversion passage 48 is substantially circular, the curvature of the inner surface of the bending path range C should be approximately ½ or more of the inner diameter to suppress the occurrence of turbulence and reduce pressure loss. For example, the inner diameter of the water diversion passage 48 is 20 mm, and the curvature of the bending path range C is preferably 10 mm or more. Further, if the inner surface of the inner corner of the bending path range C is angular, turbulence and cavitation are likely to occur on the downstream side. Therefore, the curvature may be sufficiently smaller than the outer corner side, but it is desirable to have a curved surface in the axial direction. .

  Therefore, in this example, the laterally extending path range B has a portion B1 that is inclined downward from the connection height position H0 to the valve chamber 133 toward the rotation support portion 41, Due to the downward inclination of the extension path from the valve chamber toward the rotation support portion, a curved height region H for making the bent path into a curved shape can be secured in parallel with the height region H1 of the valve chamber installation. The bulking from the wall of the washing tank along which it is further suppressed. However, since the washing water remains in a portion lower than the connection height position H0, it is preferable to drain the drain together with the valve chamber 133 in a timely manner. However, the lower end wall 48a of the curved height region H1 is connected to the valve chamber 32 by extending the extending path range B at a height equal to or higher than the horizontal direction as indicated by a virtual line in FIG. Therefore, regardless of the height or shape of the top wall 48c, it is possible to prevent the wash water from flowing into the valve chamber 133 and remaining in the middle, and to perform drain treatment at one location of the valve chamber 133. Can do.

  Of course, in order to enhance the cleaning effect by providing a plurality of cleaning nozzles, at least one of them is the rotary cleaning nozzle 12, and it is a preferred embodiment to be arranged and used preferentially in the center of the bottom 4a. The non-rotating cleaning nozzle 13 having at least the rising portion 13b and the horizontal portion 13c is selectively used in combination with one or a plurality of other cleaning nozzles to enhance the cleaning effect. You can also

  In this case, as shown in FIG. 7, the rising portion 13 b rises to a position where the connecting end 13 a as one end is higher than the washing / drainage pump 8 at a position away from the washing / drainage pump 8 in plan view. The horizontal portion 13c is connected to one end portion of the rising portion 13b, and is provided in at least one of the four circumferences 4b via at least the upper portion of the cleaning / drainage pump 8 in a plan view. If the washing / drainage pump 8 is driven in the water supply direction after supplying water to the washing tub 4 of the dishwasher main body 2, the washing / drainage pump 8 sucks and pressurizes the washing water in the washing tub 4 and supplies it to the water dividing means 14. At least one of the delivery and water distribution means 14 is a non-rotating cleaning nozzle 13 and the other is simultaneously directed toward one or a plurality of discharge paths 33, 34, 35 of a plurality of cleaning nozzles such as a rotating cleaning nozzle 12. Since the water is split and selectively supplied at different times, a cleaning action by a plurality of cleaning nozzles including at least one non-rotating cleaning nozzle 12 and one or a plurality of discharge paths 33, 34, and 35 thereof is selected. In combination, the cleaning object can be washed in various patterns from a plurality of nozzle positions into the washing tub 4 to wash objects to be cleaned such as the dishes 72 placed in the tableware baskets 6 and 7. .

  In addition, the non-rotating cleaning nozzle 13 is supplied with the cleaning water from the cleaning / drainage pump 8 provided around the bottom portion 4a of the cleaning tank 4 by the water dividing means 14 and supplied to the horizontal portion 13c through the rising portion 13b. The horizontal portion 13c is provided on at least one of the four peripheral walls 4b of the cleaning tank 4 via or above the cleaning / drainage pump 8 disposed along the horizontal portion 13c. The length of the water supply path including the rising portion 13c separated from the cleaning / drainage pump 8 through the water diverting means 14 from the cleaning / drainage pump 8 is shortened by a route that does not interfere with the cleaning / drainage pump 8. Can do. Further, the horizontal portion 13c is positioned at the required predetermined height of the cleaning tank 4 by the rising portion 13b, and can be used in combination with other cleaning nozzles.

  Further, as shown by phantom lines in FIG. 7, the rising portion 13b is constituted by a plurality of discharge paths 35, 35a, and the horizontal portion 13c and its discharge paths 35, 35a are respectively associated with the plurality of discharge paths 35, 35a. And a plurality of flow paths provided in the diversion passage 48 by integrally forming the discharge paths 35 and 35a of the rising portion 13n at least at the connection end 13a and integrally forming the discharge paths 35 and 35a. The outlets 42 and 42a can be connected and separated at the same time. As a result, the non-rotating cleaning nozzle 13 is provided with a plurality of discharge passages 35 and 35 a to increase the cleaning water injection area and enhance the cleaning effect, while the connection with the water dividing means 14 is connected to the water dividing passage 48. The outlets 42 and 42a can be connected and disconnected simultaneously, that is, in one behavior.

  As shown in FIG. 10, the valve chamber 133 can be integrally formed with the bottom 4a of the cleaning tank 4 to reduce the number of parts and the number of assembly steps, thereby further reducing the cost. Specifically, it is integrally formed so as to be connected to the bottom portion of the concave portion 49 into which the water diversion passage 48 of the bottom portion 4 a of the cleaning tank 4 is fitted by the opening 133 a portion of the valve chamber 133. Other structures are the same as the water diversion means 14 formed by the water diversion passage 48, the valve chamber 133, and the valve body 32 of the previous example, and common members and portions are denoted by the same reference numerals and description thereof is omitted. .

  INDUSTRIAL APPLICABILITY The present invention is practically used in a dishwasher having a drawer-type washing tank, and combines a rotary washing nozzle and a non-rotational washing nozzle, and simultaneously or simultaneously to each discharge path provided in one or a plurality of them. Even if the cleaning area is wide and the cleaning time is shortened by selective water splitting, a sufficient cleaning effect is exhibited.

Sectional drawing for demonstrating the schematic structure of the dishwasher which concerns on this invention. The perspective view which shows the relationship between the water distribution means used for the dishwasher, and a rotation washing nozzle. The cross section which shows the water diversion | division function part using the valve chamber of the water diversion means used for the dishwasher. The principal part sectional drawing which shows the relationship between the installation structure of the water diversion means of the dishwasher, and a rotation and a non-rotation nozzle. The horizontal direction sectional view which shows the relationship between the outflow path in the water diversion means used for the dishwasher, and its outflow port. The partial top view which looked at the principal part of the rotary washing nozzle used for the same dishwasher, and was seen. The overhead view in the washing tank of the dishwasher. Explanatory drawing which decomposes | disassembles thru | or expand | deploys and shows the valve body operation | movement mechanism between a water diversion chamber and a water diversion channel | path (a)-(d). The perspective view which shows the mounting state of the tableware and tableware used for the dishwasher. The perspective sectional view which shows another example of a relationship between the water dividing means used for the dishwasher, and a washing tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Dishwasher 1 Opening part 2 Dishwasher main body 3 Opening 4 Washing tank 4a Bottom part 6 and 7 Dish basket 8 Washing pump 12 Rotating washing nozzle 13 Non-rotating washing nozzle 14 Water diversion means 23 Water supply valve 25 Heater 26 Drain pump 27 Fan heater 31 Control means 32 Valve body 133 Valve chamber 133a Opening 133b Connection port 33, 34, 35 Discharge path 36, 37, 38 Outflow path 36a, 37a, 42 Outlet 44 Washing port 48 Water diversion path 49 Recess 61 Upper cam 62 Lower cam 72 Tableware

Claims (5)

A dishwasher main body having an opening at the front, a washing tub provided so as to be freely drawn out from the dishwasher main body, and having an opening at the top, and housed in the washing tub, such as dishes to be cleaned. A dish pump, a washing pump for pressurizing washing water, a water distribution means for selectively supplying washing water pressurized by the washing pump to a plurality of discharge paths, and one or more of the discharge paths A plurality of cleaning nozzles for spraying cleaning water from the spray port to the object to be cleaned;
The water diverting means includes a valve chamber forming an inflow portion communicating with the cleaning pump, a water diversion passage having a plurality of outflow passages connected to the valve chamber and communicating with the plurality of discharge passages, and the valve chamber And a valve body that selectively switches the wash water that flows in to the plurality of outflow passages, and the diversion passage integrates at least one of the plurality of outflow passages. A dishwasher that is formed and provided, and wherein the valve body is removable from the washing tub by removing the water diversion passage from the washing tub.   The valve body is configured to switch an outflow path for diverting the wash water flowing in from the inflow part by moving forward and backward and rotating between the inflow part of the valve chamber and the plurality of outflow paths of the diversion passage. The dishwasher according to claim 1, wherein the dishwasher is constructed.   3. The dishwasher according to claim 1, wherein the water diversion passage is fitted into a recessed portion at the bottom of the washing tank from above, and the valve chamber is provided at the bottom of the recessed portion.   The dishwasher according to any one of claims 1 to 3, wherein the diversion passage has an upper surface position that is substantially the same height as a bottom portion of an adjacent washing tank.   The dishwasher according to any one of claims 1 to 4, wherein the valve chamber is formed integrally with a bottom of the washing tank.

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