JP3835347B2 - dishwasher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dishwasher for cleaning by spraying washing water onto tableware or the like.
[0002]
[Prior art]
Conventionally, a general dishwasher has been configured as shown in FIG. Hereinafter, the configuration will be described.
[0003]
As shown in the figure, the dishwasher body 1 is provided with a washing tub 2 inside, and water or hot water is supplied into the washing tub 2 by a water supply valve 3. A drain port 4 is provided at the bottom of the cleaning tank 2, and a cleaning pump 5 that is connected to the drain port 4 and is driven by a motor is attached. The cleaning pump 5 circulates cleaning water into the cleaning tank 2. is doing. The drain port 4 is provided with a residue filter 6 for collecting residue.
[0004]
That is, the cleaning water supplied into the cleaning tank 2 passes through the residual filter 6 and is sucked into the cleaning pump 5, and is supplied from the cleaning pump 5 to the cleaning means (cleaning nozzle) 7 provided at the inner bottom of the cleaning tank 2. Supplied. The washing water sprayed from the washing nozzle 7 circulates along a route that returns to the drain port 4 after washing the dishes. At this time, the residue dropped from the tableware flows into the residue filter 6 together with the washing water, and the residue having a size that cannot pass through the residue filter 6 is collected by the residue filter 6.
[0005]
In addition, a heater 8 for heating the cleaning water is provided between the cleaning nozzle 7 and the bottom of the cleaning tank 2, and tableware 9 (object to be cleaned) can be neatly arranged above the cleaning nozzle 7. Is effectively washed by installing a tableware basket 10 configured to effectively spray the tableware 9 on the tableware 9. Further, the drainage pump 11 discharges cleaning water to the outside through the drainage path 12.
[0006]
[Problems to be solved by the invention]
However, in the conventional dishwasher, the wash water is only sprayed from below for the objects to be cleaned such as the dish 9 having various shapes used in general households, and all the dishes set in the dish basket 10 are used. It was difficult to wash 9 sufficiently. Moreover, when there is no injection from the upper part of the washing tank 2, the tableware with a thread bottom, such as a cup and a soup bowl, is easy to accumulate a fine residue on a thread bottom, and the whole rinse performance is also inadequate. Had.
[0007]
In order to solve the above-mentioned problem, it is conceivable to inject cleaning water from multiple directions using a plurality of cleaning nozzles. However, in order to inject a large amount of water at once, naturally, the amount of water supplied in the cleaning tank is also large. I have to do it. That is, the increase in the amount of water supply increases the temperature of the cleaning water, resulting in an increase in operating time, an increase in power consumption, an increase in the amount of water used, and a large cleaning pump is required. Therefore, a number of problems such as an increase in cost and an increase in noise and vibration caused by injecting a large amount of washing water at a time occur.
[0008]
It is also considered to solve these problems by using a plurality of washing pumps, but a washing pump is required for each washing nozzle, and the volume of the washing mechanism occupying the entire dishwasher increases. Therefore, there is a problem that a sufficient volume required for dishwashing cannot be secured, or the dishwasher main body becomes larger than necessary.
[0009]
In view of this, there has been proposed a method for efficiently cleaning from multiple directions with a small amount of water using a switching means for selectively switching the cleaning means for supplying cleaning water, and switching using a three-way valve or an electric motor. There is something that drives the valve body. In addition, there are some which are switched by intermittent operation of the cleaning pump without using electric drive means such as a motor. In this case, since a dedicated dynamic drive source for switching is required, the cost is low and the switching means can be downsized.
[0010]
Such switching means that does not use the electric drive means is configured as shown in FIG. 22, for example. A slightly small-diameter cylindrical valve element 14 is arranged in the cylindrical casing 13, and the valve element 14 One opening 15 is provided in the cylindrical portion, and a plurality of outflow portions 16 are provided in the cylindrical portion of the casing 13, and each of the outflow portions 16 communicates with a plurality of cleaning means (not shown). An engaging portion 17 is provided on the inner surface of the casing 13 and the outer surface of the valve body 14, and the washing pump is intermittently operated, whereby the valve body 14 is moved up and down and rotated, and an outflow portion 16 for supplying washing water is provided. Switching and cleaning means to which cleaning water is jetted are sequentially switched.
[0011]
However, in this configuration, the minute gap between the casing 13 and the valve body 14 is substantially constant, and when cleaning water flowing with foreign matter such as residue or toothpick is circulated, the foreign matter enters the gap and bites. In other words, the valve body 14 becomes immovable due to the insertion, and there is a problem that the cleaning means for supplying the cleaning water cannot be switched.
[0012]
This is a problem unique to the dishwasher, and unlike the switching valve that switches tap water, it is intended for flows with foreign objects. In addition to food, fish bones, toothpicks, rubber bands, vinyl or dish fragments Even if various foreign materials pass through, such as materials, shapes, sizes, and hardness, etc., it is necessary to have a structure that does not clog.
[0013]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to ensure that the cleaning water can be switched by the valve body even when foreign matter such as a residue or toothpick flows together with the cleaning water.
[0014]
[Means for Solving the Problems]
Dishwashing machine of the present invention in order to achieve the above object, diversion means for switching the cleaning means cleaning water from the cleaning pump is supplied, an inlet portion of the washing water pressurized by the washing pump flows, a casing having a plurality of outlet portion through each communication with a plurality of said cleaning means, a valve body provided within the casing has an opening for passing the washing water, each provided with engaging said said valve member casing The valve body is provided so as to be able to advance and retreat with respect to the outflow portion by intermittent operation of the cleaning pump along a central shaft body that penetrates the valve body, and the valve body with respect to the outflow portion of the valve body The valve body engaging portion and the casing engaging portion engage with each other by advancing and retreating operation, and the valve body rotates by a predetermined angle about the central shaft body, thereby supplying the opening of the valve body and cleaning water. If the matching part of the outflow part to be switched sequentially A, a gap is provided between the outer periphery and the casing between the center axis member and the valve body and the valve body, in which a tiltable said valve body.
[0015]
Thereby, even when a foreign substance flows into the water distribution means and the foreign substance is caught between the casing and the valve body, the foreign substance sandwiched away from the outflow portion can be removed. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a cleaning tank for storing an object to be cleaned, a cleaning pump for pressurizing cleaning water, and a plurality of cleaning means having an injection port for injecting cleaning water into the cleaning tank. And a water diversion means for switching the washing means to which the washing water from the washing pump is supplied, wherein the water diversion means includes an inflow portion into which the washing water pressurized by the washing pump flows, and a plurality of the washings Yes a casing having a plurality of outlet portion through each communication with the means, the set digits valve body in said casing having an opening for passing the washing water, and each is provided with engagement portions to said valve body and said casing The valve body is provided so as to be movable back and forth with respect to the outflow portion by intermittent operation of the cleaning pump along a central shaft body penetrating the valve body, and the valve body is moved forward and backward with respect to the outflow portion. Engagement between the engagement part of the valve body and the casing Parts are by engaging the valve body is rotated by a predetermined angle operation about the central shaft, sequentially switches the matching portion of the outlet portion for supplying the washing water to the opening of the valve body, the said valve body A gap is provided between the central shaft body and between the outer periphery of the valve body and the casing so that the valve body can be tilted .
[0017]
Thereby, since cleaning water can be injected with respect to arbitrary to-be-cleaned objects from a plurality of directions without increasing the amount of water supply, the cleaning performance can be improved. In addition, high-efficiency cleaning can be realized, such as cleaning in a shorter time. Furthermore, water saving and energy saving can be realized by reducing the amount of water supply and the number of times of rinsing. Moreover, since the setting position and setting method of the item to be cleaned in the basket are not selected, it is possible to provide a dishwasher with more excellent setability.
[0018]
Further, since switching of the cleaning means for injecting the cleaning water is performed by intermittent operation of the cleaning pump, no dedicated electric drive means such as a motor is required, the cost is low, and the apparatus can be downsized.
[0019]
Furthermore, since the valve body can be moved back and forth with respect to the outflow portion by intermittent operation of the cleaning pump, the distance between the opposed surface of the outflow portion and the valve body acts so as to be separated, accompanied by foreign matters such as residue and toothpick. Even when the flowing cleaning water is circulated and foreign matter enters the gap between the outflow portion and the valve body, the foreign matter can be removed from the gap when the valve body is separated. Therefore, foreign matter caught in a part between the outlet portion and the valve element, when a force which is inclined to the valve body by the pressure or the like of the washing water is applied, biting into the casing or the like in Bentaigako Jill form The valve body can be prevented from becoming unswitchable.
[0020]
Also, if a foreign object gets caught between the casing and the valve body at the moment when the cleaning pump is operated, the cleaning water supply is incomplete at that time. If the washing pump is stopped, the distance between the outflow portion and the valve body is increased, so that foreign matters are removed, and when the washing pump is operated next time, switching can be performed without any problem, and the object to be washed can be washed with high efficiency. That is, even when a foreign object is caught in the gap between the casing and the valve body, it is possible to provide a water distribution means that can remove the foreign object.
[0021]
According to a second aspect of the present invention, in the first aspect of the present invention, a fixed filter that collects residue by passing washing water is provided, and the distance at which the valve body is separated from the outflow portion is the fixed filter. Since there is a gap between the outflow part and the valve body, it is possible to remove all foreign matter that can flow in. Therefore, it is possible to provide a more reliable water dividing means.
[0022]
According to a third aspect of the present invention, in the first aspect of the present invention, there is provided a fixed filter that collects residue when the washing water passes, and the minimum gap between the casing and the valve body is the fixed filter. Since there is a gap larger than the size of the foreign matter that can flow into the water distribution means between the outflow part and the valve body, foreign matter is caught in the gap and the valve body cannot be switched. To prevent becoming.
[0023]
According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the outflow portion projects from the casing, and the contact area between the outflow portion and the valve body is minimized. In addition, it becomes difficult for foreign matter to be caught between the outflow portion and the valve body, and the number of times that switching is unnecessary can be reduced.
[0024]
The invention according to claim 5 is the invention according to claim 1 , wherein the shape of the outflow portion is substantially fan-shaped, and the shape formed by the plurality of outflow portions is substantially circular. Thus, the outer shape of the valve body can be minimized, and a sufficient gap can be provided between the valve body and the casing to prevent the foreign matter from being caught and to reduce the size of the water distribution means. For this reason, since the external shape of a valve body is substantially circular, it becomes difficult for a foreign material to pinch | interpose between a valve body and a casing. Furthermore, since the resistance to the movement of the valve body is reduced, the valve body can be moved smoothly and in a short time, and the time for stopping the cleaning pump can be shortened, so that highly efficient cleaning can be performed in a shorter time.
[0025]
The invention according to claim 6 is the invention according to any one of claims 1 to 5 , wherein the opening is formed as a notch connected to the outer shape of the valve body, and the opening is not a hole shape. Since it has a notch shape, even when a foreign object is likely to be caught between the casing and the opening, there is a place for the foreign object to escape, and the probability of being caught can be reduced.
[0026]
The invention according to claim 7 is the invention according to any one of claims 1 to 6 , wherein the water dividing means has a decomposable structure, and the inside of the water dividing means can be cleaned. Even when switching becomes impossible, maintenance work such as removing foreign matter can be performed, and the product can be used in a state where switching can be performed reliably.
[0027]
The invention according to claim 8 is the invention according to claim 7 , wherein the water diversion means has a structure that can be disassembled from the inside of the washing tank, and the user can also perform maintenance work. Maintenance work can be done very easily.
[0028]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0029]
Example 1
As shown in FIGS. 1 to 5, the dishwasher main body 20 is provided with a washing tub 22 that can be opened and closed by a door 21, and an object to be cleaned 23 such as tableware is set in a tableware basket 24 and accommodated in the washing tub 22. is doing. The water supply valve 25 supplies cleaning water to the cleaning tank 22, and the cleaning pump 26 pressurizes the cleaning water and supplies it to a cleaning nozzle (cleaning means) 27 having a plurality of injection holes. Spray cleaning water. The cleaning means 27 is installed at four locations, 27a and 27b that are sprayed from below the tableware basket 24, 27c that is sprayed from the upper right side, and 27d that is sprayed from the left side surface. Yes.
[0030]
The bottom of the cleaning tank 22 has a drain port 28 communicating with the suction side of the cleaning pump 26. The drain port 28 is provided with a residue filter 29 for collecting residue and a heating element 30 for heating. A temperature sensor 31 for detecting the temperature of the tank 22 is provided. The drainage pump 32 discharges the cleaning water in the cleaning tank 22. The blower 33 sends air to the cleaning tank 22 through the blower path 34 and discharges the exhaust from the exhaust port 35.
[0031]
The discharge path 36 of the cleaning pump 26 is provided with a water distribution means 37 for selectively switching the cleaning means 27 for supplying the cleaning water. The water distribution means 37 has the structure shown in FIGS. ing. A casing 40 having an inflow portion 38 into which cleaning water pressurized by the cleaning pump 26 flows, and four outflow portions 39 respectively communicating with the four cleaning means 27, and a valve body movably provided in the casing 40 41, and the valve body 41 is provided with an opening 42 through which washing water passes.
[0032]
Each of the four outflow portions 39 is connected to the cleaning means 27 by a cleaning path 43. A set of upper engaging portions 44 that rotate the valve body 41 by a predetermined angle when the valve body 41 is raised, and a set of lower engaging portions 45 that rotate the valve body 41 by a predetermined angle when the valve body 41 is lowered. Are respectively installed on the casing 40 side and the valve body 41 side.
[0033]
3 and the like are conceptual diagrams. In actuality, the casing 40 has a structure in which the casing 40 is divided into two parts, and is joined by screwing, fitting, welding, welding, or the like. Further, when the cleaning tank 22 is made of resin, a part of the casing 40 can be formed integrally with the bottom surface of the cleaning tank 22.
[0034]
In the above configuration, first, the basic operation of the dishwasher will be described. An object to be cleaned 23 such as tableware is set in a tableware basket 24 and stored in the washing tub 22. After the detergent is introduced, the door 21 closes the opening of the tableware washing machine body 20 and starts operation. A cleaning process for removing dirt on the object to be cleaned 23, a rinsing process for pouring the attached detergent and leftovers, and a drying process for drying the water suitable for the object to be cleaned 23 are performed in this order.
[0035]
First, the water supply valve 25 is operated to supply a predetermined amount of cleaning water to the cleaning tank 22, and then the cleaning water is pressurized by the cleaning pump 26, and the cleaning water 27 is jetted from the cleaning nozzle 27. At this time, the heating process is performed while heating the heating water by energizing the heating element 30 such as a sheathed heater provided in the cleaning tank 22. Further, the temperature sensor 31 detects the temperature of the cleaning tank 22 and stops the energization of the heating element 30 when the temperature becomes higher than a predetermined temperature.
[0036]
The washing water passes through the residual filter 29 and is sucked into the washing pump 26, supplied from the washing pump 26 to the washing means (washing nozzle) 27 provided at the inner bottom of the washing tank 22, and sprayed from the washing nozzle 27. Then, after the tableware 23 is washed, it circulates along the route of returning to the drain port 28 again. At this time, the residue dropped from the tableware 23 flows into the residue filter 29 together with the washing water, and the residue having a size that cannot pass through the residue filter 29 is collected by the residue filter 29.
[0037]
When the cleaning process for a predetermined time is finished, the cleaning water containing dirt is discharged out of the apparatus by the drain pump 32, and the cleaning water is newly supplied. The washing pump 26 is operated, and washing water is again sprayed from the washing nozzle 27 to rinse the article 23 to be washed, 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 outside the apparatus, and the rinsing process is completed.
[0038]
Subsequently, by performing a drying process and operating the blower 33, the outside air is blown into the cleaning tank 22 through the blower path 34 and is discharged from the exhaust port 35. At this time, the heating element 30 is energized, and evaporation of water droplets adhering to the object to be cleaned 23 is promoted by the effects of both air blowing and temperature. These drying steps are performed for a predetermined time, and the operation is terminated.
[0039]
Next, the operation and action of the water distribution means 37, which is a characteristic configuration of the present embodiment, will be described. As shown in FIG. 5, the casing 40 has a substantially cylindrical shape, the axial direction thereof is arranged in a substantially vertical direction, and the inflow portion 38 into which the cleaning water pressurized by the cleaning pump 26 flows is the lower end of the casing 40. The outflow part 39 is installed on the upper surface of the casing 40. The valve body 41 has a substantially planar shape, and the surface A between the outflow portion 39 and the valve body 41 is also a planar shape.
[0040]
When the cleaning pump 26 is operated, the valve body 41 rises in an operation accompanied by substantially linear motion and rotation according to the inclination of the upper engaging portion 44 due to the pressure of the cleaning water flowing in from the inflow portion 38, as shown in FIG. As described above, the predetermined outflow portion 39 is fixed at a position where it opens, and the cleaning water is jetted from the cleaning means 27 communicating with the outflow portion 39. When viewed from directly below the valve body 41, as shown in FIG. 6, the upper engagement portion 44 is arranged so that the opening 42 provided at the position where the washing water passes through the valve body 41 coincides with the predetermined outflow portion 39. (The details of the engaging portion are not shown in the cross-sectional view, see FIG. 8).
[0041]
Subsequently, once the washing pump 26 is stopped, the pressure that has pushed up the valve body 41 from below does not act, so the valve body 41 falls by its own weight, but at this time, according to the inclination of the lower engagement portion 45 It descends while rotating and stops at a predetermined position as shown in FIG.
[0042]
When the cleaning pump 26 is operated again, it is engaged with the next inclination of the upper engaging portion 44, the valve body 41 rises while rotating, and communicates with the next outflow portion 39, whereby the next cleaning means 27. The washing water is sprayed from. Thus, by operating the cleaning pump 26 intermittently, the cleaning means 27 to which the cleaning water is jetted can be switched in the order of 27a, 27b, 27c, and 27d.
[0043]
With these actions, the cleaning water is not supplied to the four cleaning means 27 at the same time, but the cleaning water is sequentially fed, so that an arbitrary amount of water to be cleaned 23 can be viewed from a plurality of directions without increasing the amount of water supply. Wash water can be jetted. Therefore, contaminants attached to the tableware and the like can be washed in a short time, and highly efficient washing can be realized.
[0044]
In addition, since the detergent and the residue attached to the tableware can be rinsed in a short time, the number of times of rinsing can be reduced. For example, it is possible to reduce the number of rinsing steps performed four times to three. Since the number of times of rinsing can be reduced without increasing the amount of water supplied at one time, the heating time of the washing water using the heater can be shortened, and energy saving and water saving amount can also be realized.
[0045]
In addition, since the number of cleaning nozzles 27 can be increased without increasing the amount of water supply, a cleaning method in which cleaning water is sprayed from more than one direction onto an object 23 such as tableware can be provided. Therefore, the user can freely set the object 23 to be set in the tableware basket 24 without selecting the setting method such as the vertical placement and the downside placement, so that the dishwasher is more excellent in setability. it can. Furthermore, sufficient washing performance can be exerted even for tableware such as a bowl, a deep bowl, a dish, etc., in which washing water is not sufficiently delivered by spraying from a single direction.
[0046]
In addition, if the time of spraying from one cleaning means 27 is changed from several seconds to about 1 minute, efficient cleaning can be performed, but at least one cleaning means is performed at least once during one cleaning or rinsing process. It is desirable to set so as to be ejected from No.27. Therefore, it may be set to about 10 to 30 seconds.
[0047]
Further, the switching of the cleaning means 27 for injecting the cleaning water is performed by intermittent operation of the cleaning pump 26, which does not require a reduction in the electric drive of a three-way valve, an electric motor or the like, is inexpensive, and has a water distribution means 37. Can be reduced in size. In the case of motor drive, the rotating shaft needs to be installed through the casing 40, and it is necessary to provide a dense sealing means. At the same time, the structure becomes complicated. Although there was a possibility of causing water leakage to the outside, in this configuration, there is no part that operates through the casing 40, and there is no possibility of causing water leakage to the outside.
[0048]
FIG. 8 shows the relationship between the circular engagement portion extended to a plane, and the operation that combines the substantially linear motion in the vertical direction and the rotational motion by repeating the operation and stop of the cleaning pump 26. The position of the valve body 41 is sequentially switched while performing. In the present embodiment, the valve body 41 is rotated 90 degrees by one stop and operation in order to switch to the four outflow portions 39.
[0049]
The engagement portion is not limited to this configuration, and when the cleaning pump 26 is intermittently operated, the predetermined outflow portion 39 and the opening 42 of the valve body 41 are provided during the operation of the cleaning pump 26. For example, it may be configured such that it hardly rotates when the valve element 41 is lowered and rotates about 90 degrees when it is raised, or conversely rotates about 90 degrees when it is lowered and hardly rotates when it is raised. Further, instead of the triangular claw portion shape, as shown in FIG. 9, the groove portion 46 may be configured by the shaft portion 47. Further, the same operation can be obtained even if the engaging portion is provided on the outer peripheral portion of the valve body 41.
[0050]
In the case of the engaging portion shown in FIG. 8, the valve body 41 does not come into contact with the outflow portion 39 while rotating, there is almost no wear on the contact surface, and wear-resistant material is used. There is no need, and a general resin molded product such as PP or POM can be used.
[0051]
In addition, it is desirable that the outflow portion 39 and the valve body 41 are in close contact with each other, but even if there is a slight gap due to the dimensional accuracy of the parts or the like, or even if a minute constant gap of 1 mm or less is provided, Although some leakage to the outflow portion 39 occurs, the water diversion means 37 can function sufficiently.
[0052]
In the state where the cleaning pump 26 is operated, the valve body 41 is pressurized to the outflow portion 39 side, that is, upward by the pressure acting in the casing 40, so that the valve body 41 is sealed with the outflow portion 39. Therefore, the cleaning water leakage can be reduced as much as possible, and more cleaning water is ejected from the cleaning means 27, so that the cleaning performance is further improved. If the valve body 41 or the outflow part 39 can be deformed by water pressure, the sealing performance is further improved.
[0053]
In addition, since the inside of the casing 40 is normally pressurized to about 20 to 40 kPa when the cleaning pump 26 is operated, a force of about 2 to 10 kg acts depending on the size of the valve body. It will be firmly pressed against the outflow part 39.
[0054]
Further, the opposed surfaces of the outflow portion 39 and the valve body 41 are inclined from the substantially linear movement direction of the valve body 41, that is, the vertical direction. As shown in FIG. 5, the opposing surfaces of the outflow portion 39 and the valve body 41 are in the horizontal direction, and are inclined 90 degrees from the linear motion direction of the valve body 41. Thereby, the distance of the surface where the outflow part 39 and the valve body 41 oppose is act | operated so that it may leave | separate by the linear motion of the valve body 41 at the time of switching.
[0055]
Therefore, even when the foreign matter 49 enters the gap between the casing 40 and the valve body 41 as shown in FIG. 10, for example, as shown in FIG. In addition, when the cleaning pump 26 is stopped and the valve body 41 is separated, the foreign matter 49 can be removed from the gap. For this reason, the foreign object 49 is caught in the gap, and the valve body 41 is not made immovable, and the valve body 41 can be switched reliably.
[0056]
Further, as shown in FIG. 13, even when the foreign matter 49 is sandwiched between the casing 40 and the valve body 41 at the moment when the cleaning pump 26 is operated, the cleaning water is supplied to all the cleaning means 27. However, once the cleaning pump 26 is stopped, the distance between the outflow portion 39 and the valve body 41 is increased, so that the foreign matter 49 is removed, and the cleaning pump 26 is operated next time. Can be switched without any problem, and the object to be cleaned 23 can be cleaned with high efficiency.
[0057]
Even when the foreign matter 49 does not fall off while the cleaning pump 26 is stopped, the foreign matter 49 flows toward the outflow portion 39 due to the water flow at the start of the operation of the cleaning pump 26 and does not continue to be caught in the gap. Moreover, even if the foreign matter 49 cannot be removed by stopping the operation of the cleaning pump 26 once, it can be removed by repeating several times. Further, if the shape of the upper surface of the valve body 41 is inclined, the foreign matter 49 can be more easily removed.
[0058]
That is, even when the foreign matter 49 is caught in the gap between the casing 40 and the valve body 41, the water diversion means 37 that can remove the foreign matter 49 can be provided.
[0059]
Various foreign substances 49 are assumed, and in addition to food, fish bones, toothpicks, rubber bands, vinyl, tableware fragments, and the like are assumed. In particular, a long and narrow object such as a toothpick or cherry stem may pass through a residual filter despite its length, and this configuration can cope with such a foreign object.
[0060]
Further, in this configuration, the ascending operation of the valve body 41 is performed by the pressure of the pressurized washing water, and the descending operation is performed by its own weight, and the axial direction of the valve body 41 is substantially vertical. It is necessary to take. In this case, the specific gravity of the valve body 41 needs to be 1 or more, and the larger the range in which the valve body 41 can be raised during pressurization, the more reliably the lowering and rotating operations can be performed, and the switching performance of the water distribution means 37 becomes higher.
[0061]
Moreover, since the descent time of the valve body 41 is shortened, the stop time of the cleaning pump 26 can be shortened, and the cleaning time can be shortened. Even if the valve body 41 is made of a resin material, a sufficient switching operation can be obtained, but it is effective to use a material having a high specific gravity such as a metal or a combination of a resin material and a metal material. Further, the valve body 41 can be reliably moved by using a biasing means 50 (not shown) such as a spring or a rubber material that acts in a direction in which the valve body 41 moves away from the outflow portion 39. In this case, it is not necessary to take it vertically upward, and the same effect can be obtained no matter which direction the water diversion means 37 is installed.
[0062]
Further, the distance that the valve element 41 is separated from the outflow portion 39 is equal to or larger than the gap of the residual filter 29, and the gap that is larger than the size of the foreign matter 49 that can flow into the water diversion means 37 through the residual filter 29 is Since it can exist between the outflow part 39 and the valve body 41, the foreign matter 49 pinched | interposed between them can be removed when the washing | cleaning pump 26 is stopped, and the highly reliable water distribution means 37 can always be provided.
[0063]
Note that the clearance beyond the residual filter 29 corresponds to the diameter of the round hole, the side length of the mesh, and the like. Strictly speaking, the foreign matter 49 that can pass through the residual filter 29 as shown in FIG. It is more than the minimum dimension B. In addition, the residual filter 29 may have two of a fixed filter 51 that is fixed to the drain hole 28 and cannot be removed, and a removable filter 52 that can be removed and cleaned. The smaller one (usually the removable filter) If it is set to 52), it can cope with no problem during normal operation. However, since there is a possibility that the detachable filter 52 is erroneously installed or forgotten to be attached, it is sure to set the distance away from the gap of the fixed filter 51.
[0064]
Further, the minimum gap between the casing 40 and the valve body 41 is set to be larger than the gap between the residual filter 29. The gap between the casing 40 and the valve body 41 is the outer periphery and end face direction of the valve body 41, and the end face on the outflow portion 39 side is a distance in which the valve body 41 moves linearly. Note that the clearance more than the gap of the residual filter 29 is as described above. As a result, a gap larger than the size of the foreign matter 49 that can flow into the water diversion means 37 exists between the outflow portion 39 and the valve body 41, so that the foreign matter 49 is caught in the gap and the valve body 41 cannot be switched. To prevent becoming.
[0065]
Further, the valve body 41 can be inclined with respect to the direction in which the valve body 41 moves linearly, that is, in the vertical direction. As shown in FIG. 13, even when foreign matter 49 is partially sandwiched in the gap between the outflow portion 39 and the valve body 41 and a tilting force is applied to the valve body 41 due to the pressure of the washing water or the like, the valve body 41 is twisted. This prevents the valve body 41 from becoming unswitchable by biting into the casing 40 or the like. For example, the gap of the central shaft body 48 or the like. Moreover, there is no possibility that the valve body 41 and the casing 40 may be damaged by this. The inclination angle only needs to be more than the inclination angle when the foreign matter 49 having the size of the gap of the residual filter 29 is sandwiched.
[0066]
Moreover, as shown in FIG. 5, each outflow part 39 protrudes in the casing 40 in the shape of a pipe. As a result, the contact area between the outflow portion 39 and the valve body 41 is only the end surfaces of the four pipes, and can be reduced as compared with the case where the outflow portion 39 and the valve body 41 are not projected. Is less likely to be caught, and the number of switching failures can be reduced. However, the present invention is not limited to this configuration, and the same effect can be obtained without projecting depending on the shape of the outflow portion 39 and the valve body 41.
[0067]
In addition, a central shaft body 48 penetrating the valve body 41 is provided. This improves the stability of the linear motion of the valve body 41 that is provided so as to be movable forward and backward with respect to the outflow portion 39, and the valve body 41 is dropped off. Acts to prevent .
[0068]
Further, if a detection means (not shown) for detecting the cleaning means 27 to which the cleaning water is supplied is used, the ejection time can be varied for each cleaning means 27, and more efficient cleaning can be performed. For example, in order to improve the cleaning power with respect to a teacup that is difficult to wash, it is effective to make the ejection time from the cleaning means 27a longer than others.
[0069]
As the detecting means, various methods such as a means for detecting the rotational position of the valve body 41, a means for detecting the pressure in the cleaning path 43, and a means for detecting the presence or absence of flowing water are conceivable. Further, it is not necessary to use sensors at four locations, and even at one location, it is possible to know from which position the injection is performed when combined with information on the number of times the cleaning pump 26 is operated / stopped.
[0070]
Further, when it is not necessary to inject cleaning water from all the cleaning means 27 such as when the object to be cleaned 23 is small, the unnecessary injection time from the cleaning means 27 is as short as about 1 second or less. By doing so, it is possible to perform more efficient cleaning by injecting only from the necessary cleaning means 27 without substantially injecting, and the operation time can be shortened.
[0071]
In addition, the final rinsing is performed from the cleaning means 27c provided above the table basket 24, so that the adhesion of fine particles can be reduced as much as possible, and the cleaning performance can be further improved.
[0072]
In this embodiment, the cleaning means 27 is provided at four places, and all of them are rotatable nozzles. However, the number of the cleaning means 27 is not limited to four, and the number of the cleaning means 27 may be set according to the tableware arrangement of the tableware basket 24 or the like. That's fine. The effect is exhibited if there are two or more places, but since it is important to improve the cleaning performance that spraying from two or more directions can be obtained for all tableware 23, it should be four or more places. desirable.
[0073]
On the other hand, if the number of branches is too large, the total amount of water sprayed from one cleaning means 27 becomes small and the cleaning effect is diminished, so it is desirable that the number is 10 or less, preferably 6 or less. In addition, when the rotating nozzle is used, the cleaning performance is improved, but since the space occupied by the cleaning means 27 is increased, there is a problem that the volume of the portion that stores the tableware is reduced when the outer dimensions of the main body are the same. As shown in FIG. 14, it is also effective to use a fixed cleaning means 27 in which the nozzles installed on the rear and upper sides do not rotate, and the method is not limited to the method of rotating nozzles, fixed nozzles, etc., and the number of injection ports. . Also, the installation position may be the back or front.
[0074]
Further, the cleaning means 27 to be sprayed is only one of the plurality of cleaning means 27. However, by providing two or more openings 42 of the valve body 41, the plurality of cleaning means 27 can be simultaneously provided. It is also possible to inject and switch its position.
[0075]
Further, if one of the plurality of outflow portions 39 is connected to a discharge path for discharging washing water to the outside of the machine, drainage can be performed without using the drainage pump 32, and the drainage pump 32 is installed. This eliminates the need for cost reduction and downsizing of the apparatus. Note that when the cleaning means 27 is sequentially switched during the cleaning operation, the outflow part 39 always passes through. Therefore, if the cleaning pump 26 is continuously operated, the drainage is performed during the cleaning. It is possible to prevent drainage to the outside of the machine other than during drainage by detecting the section 39 and setting the time for supplying cleaning water to the drainage outflow section 39 except for during drainage. Further, if an on-off valve is provided in the middle of the drainage path, it is possible to reliably prevent the washing water from draining outside the machine.
[0076]
The cleaning pump 26 is configured to repeat operation and stop. However, when using a pump that can vary the pump output, such as the cleaning pump 26 using an inverter motor, the strength of the pump output is used. Thus, the valve body 41 can be switched. If the output at the time of weakness is set to be equal to or less than the output at which the valve body 41 is separated from the outflow portion 39, the output can be switched, and the number of times of operation and stop of the pump is reduced. It also leads to noise reduction.
[0077]
The present invention relates to a washing water switching method, and does not limit the shape and size of the dishwasher body 20, the door opening / closing method, the arrangement of dishes, the arrangement of individual components, and the like. Moreover, in Example 1, although the example of the dishwasher which has a drying function was shown, the same effect is acquired also in the dishwasher which does not accompany a drying function.
[0078]
(Example 2)
As shown in FIGS. 15 to 17, the opposing surfaces of the outflow portion 39 and the valve body 41 are other than the planar shape.
[0079]
In FIG. 15, the opposing surfaces of the outflow portion 39 and the valve body 41 are conical. As shown in the figure, the opposing surfaces are inclined from the horizontal, and when the valve body 41 moves away from the outflow portion 39, the possibility that the trapped foreign matter 49 stays on the valve body 41 is reduced, and the foreign matter 49 is further removed. The water diversion means 37 with high performance can be provided. In addition, since the direction of a rotating shaft inclines from horizontal even if it installs in any direction, an effect is acquired.
[0080]
Further, even when the outflow portion 39 and the valve body 41 are in contact with each other, the valve body 41 can rotate, and the path of the washing water can be switched regardless of the distance that the valve body 41 moves directly, thereby improving the degree of freedom in design. . Further, as shown in the figure, when the wash water exiting the outflow portion 39 is refracted in the horizontal direction, the conical outflow portion 39 contains a component in the normal (horizontal) direction, so the pressure loss of the water distribution portion Reduction can also be achieved. In addition, the distance which the valve body 41 leaves | separates is the distance of a surface, and C dimension in a figure is the distance.
[0081]
Further, the taper angle D of the conical portion is not limited, but if it becomes close to 0 degrees, the movement of the valve element 41 becomes impossible due to the effect of the wedge, or the linear motion distance for securing a necessary gap becomes long, The casing has problems such as an increase in size, and the angle D is 30 degrees or more, preferably 90 degrees or more.
[0082]
Moreover, what was shown in FIG. 16 makes the surface where the outflow part 39 and the valve body 41 oppose pyramid shape. When the opposing surfaces are inclined from the horizontal, the action is the same as that of a cone. Further, since the outflow portion 39 and the valve body 41 are opposed to each other in a substantially flat surface, the part shape can be easily managed by the flatness and angle of the relative surface Even in mass production, it is possible to provide the water distribution means 37 having a stable performance with little leakage etc. by using parts of a predetermined size.
[0083]
Moreover, what was shown in FIG. 17 makes the surface where the outflow part 39 and the valve body 41 oppose spherical. When the valve body 41 is slightly inclined and faces the outflow portion 39, the positions of the opening portion 42 and the outflow portion 39 are slightly off, but the opposing surfaces are both the outflow portion 39 and the valve body 41. In addition, the gap between the outflow portion 39 and the valve body 41 does not widen, and the leakage of the washing water does not increase and the switching performance can be maintained.
[0084]
Example 3
As shown in FIG. 18, the shape of the outflow portion 39 is a fan shape, and the opening 42 of the valve body 41 is a notch connected to the outer shape of the valve body 41, and is basically The configuration, operation, and effects are the same as in the first embodiment.
[0085]
When the shape of the outflow portion 39 is a fan shape and a plurality of outflow portions 39 are arranged around the axis, the shape E formed by these outflow portions 39 is substantially circular. When ensuring the same area of the outflow portion 39, this shape can make the outer shape of the valve body 41 the smallest, providing a sufficient gap between the valve body 41 and the casing 40, and preventing the biting of the foreign matter 49, The water diversion means 37 can be downsized.
[0086]
Further, if the outer shape of the valve body 41 is substantially circular, the foreign object 49 is less likely to be caught between the valve body 41 and the casing 40, and the probability of causing a switching failure is reduced. Furthermore, since the resistance to the movement of the valve body 41 is reduced, the valve body 41 can be moved smoothly and in a short time, and the time for stopping the cleaning pump 26 can be shortened, so that highly efficient cleaning can be performed in a shorter time. .
[0087]
In addition, as shown in FIG. 19, by forming the opening 42 into a notch shape connected to the outer shape of the valve body 41, the foreign matter 49 is likely to be caught between the outflow portion 39 or the casing 40 and the opening 42. Even in the case, there is a place where the foreign object 49 escapes, and the probability of being caught can be reduced.
[0088]
Example 4
As shown in FIG. 20, the water splitting means 37 has a structure that can be disassembled.
[0089]
The figure is a perspective view of the bottom of the cleaning tank 22, and the water distribution means 37 can be disassembled by turning and removing the lid 53. As a result, it is possible to clean the inside of the water diversion means 37, and even if switching becomes impossible, maintenance work such as removing the foreign matter 49 can be performed and the product can be used in a state that can be switched reliably. can do. In particular, in the case of a structure that can be disassembled from the inside of the washing tub 22, maintenance work can be performed without disassembling the dishwasher body 20, so that the user can also perform maintenance work, and maintenance is very easy. Work can be done.
[0090]
In addition to the present configuration in which the lid portion 53 is a screw body, any method can be used, such as a structure that can be disassembled by screw tightening, or that the claw portion can be fitted if the lid portion 53 is inserted and can be attached and detached with one touch. It doesn't matter. Even if it cannot be disassembled from the cleaning tank 22, if it can be disassembled easily from the bottom surface, maintenance work can be easily performed.
[0091]
Moreover, when there exists the opening position of the casing 40 in the washing tank 22 like a present Example, the washing tank 22 and the casing 40 can be formed by an integral component, In this case, the water leak from the water dividing means 37 The fear of
[0092]
【The invention's effect】
As described above, according to the present invention, even when foreign matter is caught in the gap between the casing and the valve body, the foreign matter can be easily removed, and the cleaning means to which cleaning water is supplied can be accurately switched.
[Brief description of the drawings]
1 is a cross-sectional view of the main part of the dishwasher according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the main part of the dishwasher. FIG. 3 is a perspective view of the water diversion means of the dishwasher. Disassembled perspective view of the water diversion means of the machine [Fig. 5] Cross-sectional view of the water diversion means of the dishwasher in the operation state of the washing pump [Fig. 6] Bottom view of the valve body of the water diversion means of the dishwasher [Fig. Cross-sectional view of water washing means of the dishwasher when the washing pump is stopped. FIG. 8 is a detailed view of an engaging portion of the water washing means of the dishwasher. FIG. 9 is another engagement of the water washing means of the dishwasher. Detailed view of the section [Fig. 10] Cross-sectional view of the dishwasher with the foreign matter caught in the water-spreading means [Fig. 11] Cross-sectional view of the water-washing means of the dishwasher with the washing pump stopped [Fig. 12] FIG. 13 is a perspective view of a representative example. FIG. 13 shows a state in which foreign matter is sandwiched between the outflow portion of the water diversion means and the valve body of the dishwasher in Embodiment 1 of the present invention. FIG. 14 is a cross-sectional view of the dishwasher using a fixed nozzle as a washing means. FIG. 15 is a shape of the opposing surface of the outlet of the water diversion means and the valve body of the dishwasher of the second embodiment. FIG. 16 is a perspective view in which the shape of the opposing surface between the outflow part of the water diversion means and the valve body of the dishwasher of the second embodiment is a pyramid shape. FIG. 18 is a cross-sectional view in which the shape of the surface facing the outlet of the water distribution means of the dishwasher and the valve body is spherical. FIG. 18 is a plan view of the outflow of the water distribution means of the dishwasher of the third embodiment. 19] Plan view of the valve body of the water diversion means of the dishwasher of the third embodiment [FIG. 20] An exploded perspective view of the main part of the dishwasher of the fourth embodiment [FIG. 21] A cross-sectional view of the main part of the conventional dishwasher [19] FIG. 22 is a perspective view of the switching means of the dishwasher [Explanation of symbols]
22 Cleaning tank 26 Cleaning pump 27 Cleaning nozzle (cleaning means)
37 Water Dividing Means 38 Inflow Portion 39 Outflow Portion 40 Casing 41 Valve Element

Claims (8)

A cleaning tank for storing an object to be cleaned, a cleaning pump for pressurizing cleaning water, a plurality of cleaning means having an injection port for injecting cleaning water into the cleaning tank, and cleaning water from the cleaning pump are supplied A casing having a flow-in portion into which wash water pressurized by the washing pump flows, and a plurality of flow-out portions respectively communicating with the plurality of washing means. When the set digits valve body in the casing has an opening for passing the washing water, and a respective provided engagement portion on the valve body and the casing, said valve body, said valve body through Along the central shaft body, the cleaning pump is provided so as to be able to advance and retreat with respect to the outflow portion by intermittent operation of the cleaning pump, and the valve body engagement portion and the casing are engaged with each other by the advancement and retraction operation of the valve body with respect to the outflow portion The valve body engages the central shaft body Mind By operating a predetermined angle, the opening of the valve body successively switches the matching portion of the outlet portion for supplying the washing water, and an outer periphery of and between said valve body and said central axis member and the valve body The dishwasher which provided the clearance gap between the said casings, and enabled the said valve body to incline . The fixed filter washing water is collected has left by passing through provided the distance the valve body moves away from the outlet section, Dishwasher according to claim 1, wherein the not less than the clearance of the fixed filter. The fixed filter washing water is collected has left by passing through provided, minimum clearance between the casing and the valve body, Dishwasher according to claim 1, wherein the not less than the clearance of the fixed filter. The outflow part is a dishwasher according to any one of claims 1 to 3 , wherein the outflow part is provided so as to protrude into the casing. The shape of the outflow portion, Dishwasher according to claim 1, wherein the substantially fan shape. The dishwasher according to any one of claims 1 to 5 , wherein the opening has a notch shape connected to the outer shape of the valve body. The dishwasher according to any one of claims 1 to 6 , wherein the water diversion means has a decomposable structure. The dishwasher according to claim 7 , wherein the water diversion means is structured to be disassembled from the inside of the washing tank.

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