JP3835348B2 - dishwasher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dishwasher for cleaning by spraying washing water onto the tableware.
[0002]
[Prior art]
Conventionally, a general dishwasher has a structure 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]
Further, 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 (objects to be cleaned) 9 can be arranged in an orderly manner 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 9 to be cleaned such as dishes of various shapes used in general households, and all the dishes set in the dish basket 10 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 the volume required for dishwashing cannot be secured sufficiently, 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 a switching means not using the electric drive means is configured as shown in FIG. 13, 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 7 to which cleaning water is jetted are sequentially switched.
[0011]
However, in this configuration, there is always a gap between the casing 13 and the valve body 14 in order for the valve body 14 to rotate. In consideration of the dimensional accuracy of parts, deformation due to heating during operation, etc., this gap needs to be about several mm. For this reason, the wash water also flows into the outflow part 16 other than the outflow part 16 to which the wash water is to be supplied through this gap, so that a large amount of so-called leakage occurs, and a part of the circulating water by the wash pump 5 is There was a problem that it did not contribute to cleaning, the cleaning efficiency decreased, and the cleaning performance deteriorated.
[0012]
In addition, as a feature of the switching means in the dishwasher, there is a problem of reliably performing the switching operation without clogging foreign matter even when cleaning water flowing with foreign matter such as residue or toothpick is circulated.
[0013]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to improve the cleaning efficiency by suppressing the leakage of cleaning water to unnecessary cleaning means as much as possible.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, a dishwasher according to the present invention includes a water diversion unit that switches a washing unit to which washing water is supplied from a washing pump, and the water diving unit includes washing water pressurized by the washing pump. said There an inlet section for inflow, a casing having a plurality of outlet portion through each communication with a plurality of said cleaning means, and setting digits valve body in the casing has an opening for passing the washing water, and the valve body An engagement portion provided on each casing, and the valve body is provided to be movable forward and backward with respect to the outflow portion by intermittent operation of the cleaning pump along a central shaft body penetrating the valve body, The valve body and the casing or any one of the engaging portions includes an inclined portion inclined with respect to the central axis direction and a linear motion portion in the same direction as the central axis, and the valve body and the outflow portion are The valve body and the casing are moved forward and backward. Of the engagement of the engaging portion slides in the inclined portion, the valve body is the outlet portion for supplying the washing water to the opening of the valve body by operating predetermined angle around the center shaft The matching parts are sequentially switched, and the valve body is provided so as to be pressed against the outflow part by the pressure of the washing water pressurized by the washing pump, and provided in the engagement part immediately before contacting the outflow part. It is configured to move substantially linearly by the linear motion part .
[0015]
As a result, the valve body is pressurized so as to be in close contact with the outflow portion, so that the sealing performance by the valve body can be improved, the leakage of cleaning water to other than the predetermined cleaning means is reduced, and the cleaning efficiency Can be improved.
[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 of 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 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 and / or the casing is engaged. The joint is inclined with respect to the central axis direction. And the linear movement portion in the same direction as the central axis, and the sliding movement of the valve body with respect to the outflow portion by the engagement of the engagement portion of the valve body and the casing. The valve body is rotated at a predetermined angle around the central shaft body, thereby sequentially switching the opening portion of the valve body and the matching portion of the outflow portion supplying the cleaning water, and the valve body It is provided so as to be pressed against the outflow part by the pressure of the washing water pressurized by the pump, and is configured to move substantially linearly by the direct acting part provided in the engaging part immediately before contacting the outflow part . Since the cleaning water can be jetted from a plurality of directions to any object to be cleaned without increasing the water supply amount, 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.
[0017]
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.
[0018]
In addition, since the valve body is pressurized so as to be in close contact with the outflow portion, the sealing performance by the valve body is improved, so that leakage of the cleaning water to other than the outflow portion to which the cleaning water is to be supplied can be suppressed as much as possible. Since more washing water is sprayed from the washing means, the washing performance is further improved.
[0019]
In addition, when foreign matter is caught between the casing and the valve body, the cleaning water is supplied to all cleaning means, such as supply of cleaning water is incomplete, but once the cleaning pump is stopped, Since the distance between the outflow portion and the valve body is increased, foreign matters are removed, and when the cleaning pump is operated next time, switching can be performed without any problem, and the object to be cleaned can be cleaned with high efficiency. That is, it is possible to provide a water diversion means that can reduce leakage even when the cleaning water is switched, and can remove foreign matter even when the foreign matter is caught in the gap between the casing and the valve body.
[0020]
In addition, the valve body that is moved by the pressurized washing water contacts the outflow part without rotating, so the valve body does not move in a state of being pressed against the outflow part. Since there is almost no wear, the change with time in use is small, and it is possible to prevent the switching performance, the strength of the parts, and the like from being damaged from the initial state due to wear.
[0021]
The invention according to claim 2 is the invention according to claim 1, wherein the valve body is separated from the outflow portion when the cleaning pump is stopped, and contacts the outflow portion when the cleaning pump is operated. The wash water is supplied to the outflow part of the pump, and when the washing pump is stopped, the valve body is always separated from the outflow part, so that the trapped foreign matter can be removed reliably. Prevents cleaning failure from reaching the entire cleaning tank.
[0022]
The invention of claim 3 is the invention according to the claim 1 or 2, stop rotation angle valve when stopping the washing pump to operate rotation, the valve upon operation of the washing pump The rotation angle is the same as or larger than the rotation angle during operation in which the body rotates, and since the distance of rotation while being pressurized is reduced, the wear of the engaging portion that causes the rotation of the valve body can be reduced. . Moreover, since the time from the operation of the cleaning pump until the valve body comes into contact with the outflow portion is shortened, it is possible to reduce the probability of foreign matter being caught.
[0023]
The invention of claim 4 is the invention according to the claim 1 or 2, stop rotation angle valve when stopping the washing pump to operate rotation, the valve upon operation of the washing pump The rotation angle is the same or smaller than the rotation angle during operation when the body rotates. The rotation angle when the washing pump is stopped becomes smaller, so the moving time of the valve body is shortened and the washing pump stop time can be shortened. Thus, the cleaning efficiency can be increased.
[0024]
The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the engaging portion is provided closer to the rotation center side of the valve body than the outflow portion , and the engaging portion accompanying the movement of the valve body. As a result, the rotational movement of the valve body can be stabilized, and the wear of the engaging portion can be reduced, so that the probability of occurrence of switching failure can be reduced.
[0025]
The invention according to claim 6 is the invention according to claim 1 , wherein either one or both of the portions where the valve body and the outflow portion are in contact with each other are formed of an elastic body. The adhesion between the two can be dramatically improved. Note that this is more effective for a configuration in which the valve element moves substantially immediately before contacting the outflow portion.
[0026]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0027]
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.
[0028]
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.
[0029]
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.
[0030]
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.
[0031]
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.
[0032]
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.
[0033]
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.
[0034]
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.
[0035]
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.
[0036]
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.
[0037]
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 a lower end portion of the casing 40. In addition, the outflow portion 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.
[0038]
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).
[0039]
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.
[0040]
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.
[0041]
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.
[0042]
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.
[0043]
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.
[0044]
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.
[0045]
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.
[0046]
Further, in a state where the cleaning pump 26 is operated, the valve body 41 is pressurized to the outflow portion 39 side, that is, upward due to the pressure acting in the casing 40. As a result, the valve body 41 increases the adhesion of the sealing surface to the outflow portion 39, so that the leakage of cleaning water can be minimized and more cleaning water is jetted from the cleaning means 27. The 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.
[0047]
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 is applied depending on the size of the valve body 41. It will be firmly pressed against the outflow part 39.
[0048]
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 valve body 41 can be raised during pressurization, the more reliably it can be lowered and rotated, and the switching performance of the water diversion means 37 becomes higher. .
[0049]
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.
[0050]
The valve body 41 can also be reliably moved by using a biasing means 50 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.
[0051]
The relationship between the circular upper engagement portion 44 and the lower engagement portion 45 extended to a plane is shown in FIG. 8. By repeating the operation and stop of the cleaning pump 26, the vertical upper and lower engagement portions 44 and 45 are substantially The position of the valve body 41 is sequentially switched while performing an operation combining a linear motion and a rotational motion. In this embodiment, the valve body 41 is rotated 90 degrees by one stop and operation in order to sequentially switch to the four outflow portions 39, and in this figure, it is about 20 degrees when ascending and about 70 when descending. The upper engaging portion 44 and the lower engaging portion 45 are set so as to rotate at a predetermined degree.
[0052]
The upper engagement portion 44 slides while being pressurized, but water pressure does not act on the lower engagement portion 45. Therefore, by reducing the rotation angle of the upper engagement portion 44, the wear of the upper engagement portion 44 can be reduced, and the occurrence of switching failure such as the positions of the opening 42 and the outflow portion 39 not matching can be prevented. In addition, since the time from the start of the operation of the cleaning pump 26 until the valve element 41 contacts the outflow portion 39 is shortened, the probability that the foreign matter 49 is caught can be reduced, and the cleaning efficiency can be improved.
[0053]
On the contrary, although not shown, the rotation angle at the time when the valve element 41 rotates when the cleaning pump 26 is stopped is the rotation angle at the time when the valve element 41 rotates when the cleaning pump 26 is operated. In the case of the same or smaller configuration, the rotation angle becomes smaller when the cleaning pump 26 is stopped. Therefore, the movement time of the valve body 41 is shortened, and the stopping time of the cleaning pump 26 can be shortened. The time can be extended and the cleaning efficiency can be increased.
[0054]
Moreover, the upper engaging part 44 and the lower engaging part 45 are installed inside the outflow part 39 (opening part 42) as shown in the figure. The inner peripheral side of the valve body 41 has a slower peripheral speed during rotation, a smaller moving distance, and a steep angle of the slope of the engaging part. Therefore, the rotational operation of the valve body 41 is stabilized. At the same time, wear of the upper engaging portion 44 and the lower engaging portion 45 is reduced, and the probability of causing a switching failure can be reduced.
[0055]
The engaging portions are not limited to the main shape such as a spiral shape or a triangular shape. When the cleaning pump 26 is operated intermittently, a predetermined outflow portion 39 and a valve are operated while the cleaning pump 26 is operating. It is only necessary that the openings 42 of the body 41 coincide with each other. For example, a configuration in which the shaft portion 47 follows the groove portion 46 as shown in FIG. Further, the position of the engaging portion such as the outer peripheral portion of the valve body 41 is not limited.
[0056]
Further, the upper engaging portion 44 operates the washing pump 26 and acts so that the valve body 41 moves substantially straight immediately before the valve body 41 contacts the outflow portion 39. It moves substantially linearly by the action of the portion F in FIG. For this reason, since the valve body 41 moved by the pressurized washing water rises without rotating and contacts the outflow portion 39, the valve body 41 does not move while being pressed against the outflow portion 39. Since the surfaces where they come into contact with each other are hardly worn, there is little change with time in use, and the switching performance, the strength of the parts, and the like are not impaired from the initial state due to wear. For this reason, it is not necessary to use an abrasion-resistant material, and a general resin molded product such as PP or POM can be used.
[0057]
Further, if both or any one of the portions where the valve body 41 and the outflow portion 39 are contacted is formed of an elastic body such as rubber or elastomer, the adhesion between the valve body 41 and the outflow portion 39 is dramatically improved. it can. However, when the valve body 41 and the outflow portion 39 need to slide, the frictional resistance is large, so that the valve body 41 and the outflow portion 39 cannot be used. If it is used in such a configuration, the elastic body is less worn, and therefore more effective.
[0058]
In addition, although the central shaft body 48 penetrating the valve body 41 is provided, this acts to increase the stability of the linear motion of the valve body 41 and prevent the valve body 41 from falling off .
[0059]
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.
[0060]
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.
[0061]
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.
[0062]
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.
[0063]
Further, the opposing 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.
[0064]
Thereby, the direct movement of the valve body 41 at the time of switching acts so that the distance between the opposed surfaces of the outflow portion 39 and the valve body 41 is increased, and the washing water flowing along with the foreign matter 49 such as a residue or a toothpick is circulated. Even when the foreign matter 49 enters the gap between the casing 40 and the valve body 41, the foreign matter 49 can be removed from the gap when the cleaning pump 26 is stopped and the valve body 41 is separated. 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.
[0065]
Further, as shown in FIG. 10, even when the foreign matter 49 is caught 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. Although the supply may be incomplete, once the cleaning pump 26 stops, the distance between the outflow portion 39 and the valve body 41 increases, 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.
[0066]
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. Even if the foreign matter 49 cannot be removed only by stopping and operating 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.
[0067]
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, and the cleaning efficiency is reduced due to poor switching of the water diversion means 37. There is no.
[0068]
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, elongate objects such as toothpicks and stalks of cherries may pass through the residual filter even though they are long, and this configuration can cope with such foreign objects. .
[0069]
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.
[0070]
Note that the gap or more of the residual filter 29 corresponds to the diameter of the round hole, the side length of the mesh, and the like, but strictly speaking, it is equal to or larger than the minimum dimension of the foreign matter 49 that can pass through the residual filter 29. is there. 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.
[0071]
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.
[0072]
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.
[0073]
In addition, although the valve body 41 was made into the planar shape, it is not limited to this, Even if it is a cone shape or a spherical body, it can be pressed against the outflow part 39 with water pressure.
[0074]
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.
[0075]
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 it is important to improve the cleaning performance that spraying from two or more directions can be obtained for all tableware. .
[0076]
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. 11, it is also effective to use fixed cleaning means 27 in which the nozzles installed on the back surface and above do not rotate, and are not limited to the method of rotating nozzles, fixed nozzles, etc., or the number of injection ports. . Also, the installation position may be the back or front.
[0077]
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.
[0078]
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.
[0079]
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.
[0080]
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 the Example, 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.
[0081]
【The invention's effect】
As described above, according to the present invention, it is possible to improve the cleaning efficiency by reducing leakage of cleaning water to other than the predetermined cleaning means.
[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. FIG. 10 is a cross-sectional view of a state in which foreign matter is sandwiched between the outflow part of the water distribution means of the dishwasher and the valve body. FIG. 11 is a schematic diagram showing that a fixed nozzle is used for the cleaning means of the dishwasher. Sectional view [FIG. 12] Main part sectional view of a conventional dishwasher [FIG. 13] Perspective view of switching means of the same 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 (6)

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 The valve body and / or the casing or any one of the engagement portions are inclined with respect to the central axis direction by being intermittently operated along the central shaft body. The same as the inclined axis and the central axis The valve body slides at the inclined portion by the engagement of the valve body and the engagement portion of the casing by the forward and backward movement of the valve body with respect to the outflow portion, and the valve body is moved to the central axis. The valve body is configured to rotate at a predetermined angle around the body to sequentially switch the coincidence portion between the opening of the valve body and the outflow portion supplying the cleaning water, and the valve body is configured to have a pressure of cleaning water pressurized by the cleaning pump. The dishwasher is provided so as to be pressed against the outflow portion by the above-mentioned, and is configured to move substantially linearly by the direct acting portion provided in the engaging portion immediately before contacting the outflow portion .   The dishwasher according to claim 1, wherein the valve body is configured to be separated from the outflow portion when the washing pump is stopped, to contact the outflow portion when the washing pump is operated, and to supply washing water to the predetermined outflow portion. . Stop rotation angle valve body wash pump when stopping to work rotation, wherein the valve body is at a rotation angle identical to large operation that operates rotation of the washing pump upon operating configuration and claims 1 or 2. The dishwasher according to 2 . Stop rotation angle valve body wash pump when stopping to work rotates, the driving time of rotation angle of the valve body wash pump upon operating operates rotation and the same or smaller construction claims 1 or 2. The dishwasher according to 2 . The dishwasher of any one of Claims 1-4 which provided the engaging part in the rotation center side of the valve body from the outflow part . 2. The dishwasher according to claim 1, wherein at least one of the contact portion between the valve body and the outflow portion is formed of an elastic body.

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