JP3829777B2 - dishwasher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a dishwasher or dishwasher capable of switching a washing means for supplying washing water.
[0002]
[Prior art]
  Conventionally, a general dishwasher has a structure as shown in FIG. Hereinafter, the configuration will be described. 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 drainage hole 4 is provided at the bottom of the washing tank 2, and a washing pump 5 that is connected to the drainage hole 4 and is driven by a motor is attached. The washing pump 5 circulates washing water into the washing tank 2. is doing. Further, the drain hole 4 is provided with a residue filter 6 for collecting the residue.
[0003]
  That is, in this circulation, the washing water passes through the residual filter 6 and is sucked into the washing pump 5 and is supplied from the washing pump 5 to the washing means (washing nozzle) 7 provided at the inner bottom of the washing tank 2. After being sprayed from the nozzle 7 and washing the dishes, the process returns to the drain hole 4 again. 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 is collected by the residue filter 6.
[0004]
  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 9 can be arranged in an orderly manner above the cleaning nozzle 7, so that the cleaning water can be effectively disposed of in the tableware. The tableware basket 10 constituted so that it may inject to 9 is installed, and it wash | cleans efficiently. The drainage pump 11 discharges the washing water through the drainage hose 12 to the outside of the machine.
[0005]
[Problems to be solved by the invention]
  However, in the conventional dishwasher, the washing water is only sprayed from below, and all the dishes 9 set in the dish basket 10 cannot be efficiently washed, and there is a problem that the washing time becomes long. .
[0006]
  For this reason, as shown in Japanese Patent Laid-Open No. 5-305050, it is conceivable to inject cleaning water from multiple directions using a plurality of cleaning nozzles. Of course, the water supply in the washing tank must be increased. That is, the temperature rise time of the wash water is increased due to an increase in the amount of water supply, resulting in an increase in operation time, an increase in power consumption, an increase in the amount of water used, and a large wash pump is required. Many problems occur, such as an increase in cost and noise and vibration caused by injecting a large amount of washing water at a time. If the amount of water is not increased, the injection pressure and flow rate from one cleaning means will be reduced, and cleaning will not be possible.
[0007]
  For this reason, as described in JP-A-2001-321316, there is a method of cleaning from multiple directions while sequentially injecting cleaning water using a switching unit that selectively switches the cleaning unit that supplies cleaning water. Yes, it can be done efficiently without increasing the amount of water supply.
[0008]
  However, since the basic setting position of the tableware is determined in the tableware basket, and the type of dirt and the method of attachment differ depending on the tableware, simply spraying from multiple directions does not improve the cleaning efficiency, leaving it unwashed. In order to secure the cleaning performance, the cleaning time is increased.
[0009]
  This invention solves the said conventional subject, and aims at performing more highly efficient washing | cleaning, injecting washing water sequentially from multiple directions.
[0010]
[Means for Solving the Problems]
  To achieve the above object, the present invention provides a plurality of cleaning means for injecting cleaning water into a cleaning tank, a water distribution means for switching the cleaning means to which cleaning water is supplied from a cleaning pump, and the cleaning means. Control means for controlling the supply of washing water ofThe control means includesWater dividing meansByWhile sequentially injecting cleaning water from the plurality of cleaning means,In the final rinse stepFrom above toward the item to be cleaned set in the tableware basketThe spray time from the cleaning means to spray is longer than the spray time from other cleaning meansIs.
[0011]
  Thereby, highly efficient cleaning with high cleaning performance and rinsing performance can be performed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
  The invention according to claim 1 of the present invention includes a tableware basket for setting an object to be cleaned, a cleaning tank for storing the tableware basket, a cleaning pump for pressurizing cleaning water, and spraying the cleaning water into the cleaning tank. A plurality of cleaning means having an injection port, a water distribution means for switching the cleaning means supplied with the cleaning water from the cleaning pump, and a control means for controlling the supply of the cleaning water to the cleaning means,The control means includesWater dividing meansByWhile sequentially injecting cleaning water from the plurality of cleaning means,In the final rinse stepFrom above toward the item to be cleaned set in the tableware basketThe spraying time from the cleaning means for spraying is longer than the spraying time from other cleaning means,It is possible to perform highly efficient cleaning with high cleaning performance and rinsing performance without increasing the amount of water used.
[0013]
  The invention described in claim 2A dish basket for setting an object to be cleaned, a washing tank for storing the dish basket, a washing pump for pressurizing washing water, a plurality of washing means having an injection port for injecting washing water into the washing tank, A water distribution means for switching the cleaning means to which the cleaning water from the cleaning pump is supplied; and a control means for controlling the supply of the cleaning water to the cleaning means, wherein the control means supplies the cleaning water by the water distribution means. In addition to injecting sequentially from multiple cleaning means, in the final rinsing process, the interval between water separation switching is made longer and the injection time from the cleaning means is made longer than in the cleaning process.Since it is possible to wash off the reattached particles, the performance can be improved.
[0014]
  The invention according to claim 3 is the above-mentioned claim 1.Or 2In the invention described inThe water diversion means is configured to rotate the valve body with a drive motor.
[0015]
  The invention according to claim 4 is the above-mentioned claim 1.Or 2In the invention described inThe water distribution means is configured to rotate the valve body by ON / OFF operation of the cleaning pump, can be switched without using the electric drive means, and can provide a small water supply means at low cost.
[0016]
  The invention according to claim 5 is the above-mentioned claim 1.Or 2In the invention described inIt is provided with two cleaning means that are branched by water splitting means and sprayed from the back side of the cleaning tank.
[0017]
  The invention according to claim 6 is the above-mentioned claim 1.Or 2In the invention described inThe time of spraying from each cleaning means is about 10 seconds to 1 minute.
[0018]
  Claim7The invention described in claim 1 is the above-mentioned claim 1.Or 2In the invention described in the above, the washing tank is formed in a substantially rectangular planar shape, and a plurality of washing means are provided below the tableware basket. In a rectangular washing tank that is difficult to perform, the washing water is branched and sprayed from multiple directions by a water distribution means, so that the washing and rinsing performance can be improved without increasing the amount of water.
[0019]
  Claim8The invention described in claim 17In the invention described in the above, the plurality of cleaning means provided below the tableware basket are configured to inject the cleaning water at the same time, and in a rectangular cleaning tank, the plurality of rotating nozzles simultaneously inject from below the tableware basket. It is a structure, and it can wash | clean more completely and earlier in the same amount of water as before.
[0020]
【Example】
  Embodiments of the present invention will be described below with reference to the drawings.
[0021]
  (Example 1)
  As shown in FIGS. 1 and 2, the dishwasher 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. A water supply valve (not shown) supplies cleaning water to the cleaning tank 22, and a cleaning pump 26 pressurizes the cleaning water and supplies it to a cleaning means (cleaning nozzle) 27 provided with a plurality of injection ports. Washing water is jetted from the washing means 27.
[0022]
  The cleaning means 27 is installed at four locations: cleaning means 27a and 27b sprayed from below the tableware basket 24, and cleaning means 27c and 27d sprayed from the back (side) side of the cleaning tank 22, and the cleaning means 27a, Reference numeral 27b denotes a rotary nozzle that rotates around an axis by a jet, and cleaning means 27c and 27d are fixed nozzles that do not move. Each cleaning means 27 has about 4 to 10 injection ports for injecting cleaning water. ing.
[0023]
  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 has a residue filter 29 for collecting residue and a heating element for heating the cleaning water. 30 and a temperature sensor 31 for detecting the temperature of the cleaning tank 22 is provided. The drainage pump 32 discharges the cleaning water in the cleaning tank 22. The blower (not shown) sends air to the cleaning tank 22 through a blower path (not shown) and discharges the exhaust from the exhaust port 35.
[0024]
  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 is an inflow portion 38 into which the cleaning water flows. And four outflow portions 39 respectively communicating with the four cleaning means 27a, 27b, 27c, and 27d. The four outflow portions 39 are connected to the cleaning means 27a, 27b, 27c, and 27d through the cleaning paths 43, respectively. Has been. In addition, one washing | cleaning means points out the aggregate | assembly of the injection nozzle in which the wash water which passed the one washing | cleaning path | route 43 is injected.
[0025]
  The water diversion means 37 is configured as shown in FIG. 3, and includes a casing 40 having an inflow portion 38 and an outflow portion 39, and a valve body 41 movably provided in the casing 40. Is provided with an opening 42 through which washing water passes. And in order to switch the outflow part 39 connected to the opening part 42, it has the drive motor (electric drive source) 54 which rotates the valve body 41, and the motor shaft 55 of this drive motor 54 has the clearance gap. The valve body 41 is fitted.
[0026]
  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 from 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 executed in this order.
[0027]
  First, the water supply valve 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 means 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.
[0028]
  The circulation of the washing water passes through the residual filter 29, is sucked into the washing pump 26, and is supplied from the washing pump 26 to the washing means (washing nozzle) 27 provided at the inner bottom portion of the washing tank 22. After being sprayed and cleaning the object to be cleaned 23, it is carried out along the route of returning to the drain port 28 again. At this time, the residue or the like dropped from the object to be cleaned 23 flows into the residue filter 29 together with the cleaning water, and the residue having a size that cannot pass through the residue filter 29 is collected by the residue filter 29. .
[0029]
  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 sprayed again from the washing means 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.
[0030]
  Subsequently, by performing a drying process and operating the blower, the outside air is blown into the cleaning tank 22 through the blower path 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. In addition to controlling the supply of cleaning water to the cleaning tank 22, the driving of the cleaning pump 26, and the output of the temperature sensor 31, the heating water is heated to a predetermined temperature to heat the cleaning water in the cleaning tank 22 to a predetermined temperature. The energization control, the drain pump 32 drive control, the blower drive control in the drying process, and the like are controlled by control means (not shown) provided in the dishwasher body 20.
[0031]
  Next, the operation and action of the water distribution means 37 and the cleaning means 27, which are characteristic configurations of the present embodiment, will be described. The water diversion means 37 has a configuration in which an outflow portion 39 from which the washing water that has flowed into the casing 40 flows out from the inflow portion 38 is branched by the rotation operation of the valve body 41. The drive motor 54 is driven to drive the valve body 41. By rotating, the outflow part 39 for supplying the cleaning water is sequentially switched, and the cleaning means 27 for spraying the cleaning water can be sequentially switched in the order of 27a, 27b, 27c, 27d at a predetermined interval.
[0032]
  At this time, the drive motor 54 has a method of driving continuously and a method of driving intermittently so that the opening 42 stops at the position of the outflow portion 39. In the former case, a sensor or the like for detecting the position of the valve body 41 is unnecessary, and the configuration is simple. In the latter case, a position sensor or the like is required, but there is an advantage that the switching efficiency is good and the position of the cleaning means 27 and the injection time can be selectively set according to the situation. Not what you want.
[0033]
  In addition, if the time of spraying from one cleaning means 27 is switched from several seconds to several minutes, efficient cleaning can be performed. However, at least one cleaning means is used 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 seconds to 1 minute. The switching of the cleaning means 27 is also controlled by the control means.
[0034]
  A plurality of cleaning means 27 for sequentially injecting cleaning water at predetermined intervals using the water distribution means 37 are provided at positions corresponding to the arrangement of the objects to be cleaned 23, and are suitable for each object to be cleaned 23. The cleaning effect is enhanced by injecting cleaning water at the specified direction, injection pressure and flow rate. In the tableware basket 24 of the present embodiment, the lower half of the lower half mainly contains bowls 23 (A), the right half contains dishes 23 (B), and small items 23 (C) such as chopsticks are placed near the center. In the upper stage provided above the bowl, a cup of water or a cup 23 (D) is set.
[0035]
  In FIG. 1, a cleaning means 27 c having an injection port above the dishes 23 (B) set mainly on the right side of the tableware basket 24 is provided on the upper right side of the back surface in the vicinity of the dishes 23 (B). A cleaning means 27d for injecting cleaning water from below the cups 23 (D) set at the upper portion is provided at an intermediate height position on the right side of the back surface. Further, the cleaning means 27d is provided with an injection port that directly injects toward the top surface of the cleaning tank 22. Further, both of the cleaning means 27c and 27d are provided with an injection port aimed at the accessory 23 (C).
[0036]
  The dishes 23 (B) have a large surface area, and if they are simply sprayed from multiple directions, the residue once washed off cannot be easily washed away, but the water diversion means 37 is used. By providing the cleaning means 27c above 23 (B), the washing water can be dispersedly jetted from above toward the dishes 23 (B) without increasing the amount of water used, and the effect of washing away from top to bottom. Rinsing can be performed and reattachment can be eliminated. In addition, it goes without saying that this jet contributes to cleaning, and both the performance of cleaning and rinsing can be improved, and highly efficient cleaning can be performed. In addition, since the cleaning performance is improved, it is possible to reduce the amount of water supplied at one time if the same performance as before is ensured, and to realize water saving and energy saving.
[0037]
  Further, the cups and cups 23 (D) have a shape whose depth is larger than the entrance dimension. When cleaning the inside, the high injection pressure reaching the back and the entire inner wall are distributed with the cleaning water. An injection with both flow rates is required. In the vicinity of the position where the cups 23 (D) are set, there is provided a cleaning means for concentrating and injecting cleaning water directly toward the inside of the cups, and by obtaining a high pressure and large flow rate injection by the water diversion means 37, The cleaning performance can be improved without increasing the amount of water supply at one time.
[0038]
  Further, since the hot water drinker is basically placed face down, the thread bottom E tends to accumulate residue, but has an injection port that directly injects toward the top surface of the washing tank 22. Without being blocked by the object to be cleaned, these residues can be washed away by dropping the cleaning water from the top surface, and the rinsing performance is improved. A convex portion is formed on the top surface above the position where the cups 23 (D) are arranged, so that the washing water is concentrated on the thread bottom E, so that the rinsing performance of the thread bottom E is further improved. It has improved.
[0039]
  Further, the spray port of the cleaning means 27c is also sprayed from above the small items 23 (C) such as chopsticks and spoons, and the residue is easily reattached to the overlapping portion of the small items. However, as with the dishes 23 (B), rinsing can be efficiently performed by spraying a large amount of washing water from above toward the small objects 23 (C).
[0040]
  Note that the expression “from above toward the object 23 to be cleaned” is not limited to the above, but includes an injection port on the wall surface of the cleaning tank 22 and includes injection from obliquely above. There is no difference in what you get. Moreover, it is not necessary to inject from the upper part with respect to all the dishes 23 (B), and the effect for that can be acquired even if it injects only in part. The same applies to the expression from below. Therefore, even if the cleaning means 27 is provided on the wall surface, protrudes from the wall surface, is provided in the space, or is installed in the tableware basket 24, the same effect can be obtained.
[0041]
  Further, the cleaning means 27d provided on the left side of the back surface also injects in the direction of the small items 23 (C) located on the right side of the cleaning tank 22. Even if a slight amount is injected toward the space in another direction, the washing water hits from more directions, so that the washing performance is further improved. Other than this, for example, in the cleaning means 27a and the cleaning means 27c constituted by rotating nozzles, the effect can be obtained by directing the tip injection port to a space in another direction.
[0042]
  Further, by using the water diversion means 37 and installing the cleaning means 27 at a position corresponding to the arrangement of the object to be cleaned 23, it is possible to rinse out the detergent and residue adhering to the object to be cleaned 23 with high efficiency. Therefore, it is possible to reduce the number of times of rinsing, and for example, it is possible to reduce the rinsing performed in 4 steps to 3 steps. Since the amount of water supplied at one time can be reduced and the number of times of rinsing can be reduced, the heating time of the cleaning water using the heater 30 can also be shortened.
[0043]
  Further, when the output of the cleaning pump 26 is variable, such as when an inverter motor capable of changing the rotation speed of the cleaning pump 26 is used, the output of the cleaning pump 26 can be changed by the cleaning means 27 to which cleaning water is supplied. It is possible to perform more efficient cleaning, such as spraying at a higher pressure or flowing a higher flow rate. For example, when spraying from the cleaning means 27a, the output can be increased, the spraying pressure can be increased, and the rice can be removed more quickly. At this time, it is necessary to detect which cleaning means 27 is ejecting, and a sensor that detects the position of the valve body 41 of the water diversion means 37 is used, or a sensor that detects the pressure and flow in the cleaning path 43. Can be determined.
[0044]
  Further, if the spraying time is different for each cleaning means 27, high cleaning performance can be obtained without increasing the total operation time by multiplying the cleaning time by increasing the cleaning time. For example, a lot of energy is required for cleaning a rice bowl with rice grains stuck thereto, and if the spraying time from the cleaning means 27a is increased, it can be cleaned without increasing the overall time.
[0045]
  In addition, it is also effective to change the switching time between washing and sipping, and in the final rinsing, by increasing the interval of water separation switching or by increasing the injection time from above toward the object to be cleaned 23, Since the reattached particles can be washed away, the performance can be improved. For this purpose, the switching time can be controlled by detecting the injection position, or it can be lengthened by a mechanical means such as changing the area of the outflow portion 39 of the water dividing means 37.
[0046]
  When the planar shape of the cleaning tank 22 is substantially square, the cleaning water can be sprayed to the entire cleaning tank 22 by providing one rotating nozzle 27 on the bottom surface of the cleaning tank 22, and further above the cleaning tank 22. If the rotary nozzle 27 is provided and a total of two rotary nozzles are used, highly efficient cleaning can be realized. However, when the planar shape of the cleaning tank 22 is substantially rectangular as shown in FIG. 4, it is very difficult to spray the cleaning water to the entire cleaning tank 22 with one cleaning means 27, and at least the dish basket 24. Two cleaning means are required below.
[0047]
  When the planar shape of the cleaning tank 22 is formed in a substantially rectangular shape, the cleaning tank 22 is positioned on the other left half by the cleaning water sprayed from the cleaning means 27a positioned on one side, for example, the right side of the cleaning tank 22 in the longitudinal direction. When the object to be cleaned 23 (B) is cleaned, even in the rectangular cleaning tank 22 where it is difficult to distribute the cleaning water throughout, the single object 23 is sprayed from more than one direction. Therefore, it can wash | clean more efficiently.
[0048]
  Moreover, as the aspect ratio of the rectangle deviates from twice, the area (hatched portion) where only the two rotary nozzles 27 cannot be cleaned increases as shown in FIG. Becomes more difficult. For this reason, it is indispensable to install three or more cleaning means 27, and more cleaning means 27 are required to allow the cleaning water to be applied from a plurality of directions. In this case, since a large number of injection ports are naturally required, it is necessary to circulate a large amount of cleaning water simultaneously when spraying the cleaning water. However, by using the water dividing means 37, a small amount of water is required. Thus, the effect of the water dividing means 37 can be further exhibited.
[0049]
  In addition, although the water diversion means 37 made the system which rotates the valve body 41 with the drive motor 54, as shown in FIG. 3, the same washing | cleaning effect is acquired even if it is another system. For example, as shown in FIGS. 5 and 6, there is a method of switching the valve element 41 by using the ON / OFF operation of the cleaning pump 26. This is because the pump 26 is operated intermittently by using the vertical movement of the valve body 41 by ON / OFF of the cleaning pump 26 and the fitting of the engaging portions 44 and 45 provided on the casing 40 and the valve body 41. By doing so, the outflow part 39 can be switched sequentially.
[0050]
  When the cleaning pump 26 is operated from the state of FIG. 6 in which the cleaning pump 26 is stopped, the valve body 41 rises while rotating along the engaging portion 44, and the valve body 41 stops at a predetermined position, and the Washing water can be supplied only to the cleaning means 27. In this case, switching can be performed without using the electric drive means, and the small water diversion means 37 can be provided at low cost. In addition, various systems such as an on-off valve and a three-way valve can be considered.
[0051]
  In this embodiment, a part of the cleaning path 43 provided on the back surface and the cleaning means 27c and 27d are separated from the cleaning tank 22 and are arranged in the cleaning tank 22, but the cleaning tank 22 is formed of stainless steel. Even when it is difficult to form a flow path on the side wall surface, such as when it is applied, it can be easily attached. Moreover, if it is a separate body, parts can be transported efficiently because the parts can be miniaturized.
[0052]
  Moreover, although the washing | cleaning means 27c and 27d were each comprised separately, it can also comprise integrally from the standup part from a tank bottom to the previous injection port. In this case, the cost can be reduced because the number of parts and the number of assembly steps are reduced. Further, when the cleaning tank 22 is formed of resin, the cleaning path 43 can be integrally formed on the wall surface of the cleaning tank, and the injection port can be directly provided on the wall surface of the cleaning tank 22. Moreover, it is not necessary to attach to the wall surface of the washing tank 22, and there is no problem if the cleaning means 27 is attached to the tableware basket 24 and sprayed on the tableware from a predetermined direction.
[0053]
  In the present embodiment, the number of the cleaning means 27 is four, but the number may be set according to the arrangement of the objects to be cleaned 23 in the tableware basket 24 and the like. Although the rotary type and the fixed type are not limited, the use of the rotary nozzle improves the cleaning performance, but the space occupied by the cleaning means 27 increases, so the outer dimensions of the dishwasher body 20 are the same. In this case, there is a problem that the volume of the portion for storing tableware is reduced. However, since cleaning by two cleanings from below is the main cleaning, it is desirable to use a rotating nozzle. Further, as shown in FIG. 7, all the rotating nozzles can be used for the cleaning means 27.
[0054]
  Moreover, it can also be set as the structure which provides an injection port in the door 21 thru | or the door side, and injects in a back direction. In this case, the injection of washing water does not hit the seal part of the door 21 directly, and has good sealing performance Is obtained.
[0055]
  Further, in the dishwasher in the rectangular washing tub 22, it is difficult to inject washing water into the entire dish basket 24 by providing the cleaning means 27 composed of two rotating nozzles below the dish basket 24. In the washing tank 22 as well, the washing and rinsing performance can be improved without increasing the amount of water by branching the washing water by the water dividing means 37 and spraying it from multiple directions.
[0056]
  Moreover, if it operates as a structure (one washing | cleaning means) in which the two rotating nozzles provided below the tableware basket spray simultaneously, it can provide a high-performance dishwasher in terms of strong washing. At the same time, many cleaning means 27 can be provided above, and the effect of rinsing with a larger flow rate from above is further increased.
[0057]
  Further, the cleaning means 27 is located above the lower surface of the tableware basket 24 and is provided on both sides in the longitudinal direction of the cleaning tank 22, so that in the substantially rectangular cleaning tank 22, almost the entire area of the tableware basket 24 is viewed from above. Since washing water can be jetted and sufficient washing and rinsing performance can be ensured, the number of washing means 27 can be minimized. Further, since the number of cleaning means 27 is reduced, it is possible to increase the cleaning power of other parts, for example, it is possible to lengthen the spray time from the bottom of the tableware basket, and the cleaning performance of the entire cleaning tank 22 can be improved.
[0058]
  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 used. It is also possible to inject simultaneously and switch the position. In this case, the washing water can be jetted at the same time while the lower two rotating nozzles are used as the separate washing means 27.
[0059]
  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 portion 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.
[0060]
  Further, if an on-off valve (not shown) is provided in the middle of the drainage path, it is possible to reliably prevent the washing water from draining outside the machine. Moreover, the rotation of the valve body 41 of the water diversion means 37 can be reversed in the middle so as not to branch to the drainage path, and unnecessary drainage can be prevented.
[0061]
  Moreover, the arrangement of the tableware in the tableware basket 24 is an example, and the cleaning means 27 may be provided corresponding to the setting position. Further, even when the item to be cleaned 23 is set in a place other than the tableware basket 24, such as when an accessory case for setting small items is provided inside the door 21, if the cleaning means 27 corresponding to the position is provided, A similar effect can be obtained.
[0062]
  The present invention relates to a method of spraying in a dishwasher provided with a water diversion means 37. The shape and size of the dishwasher main body 20, the opening and closing method of the door 21, the arrangement of dishes, the arrangement of individual components, and the like It is not intended to limit. 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.
[0063]
  (Example 2)
  The valve body 41 of the water distribution means 37 has an opening 42 (not shown) and supplies cleaning water to two locations of the outflow portion at the same time. If the amount of water is the same as that in the case of using two rotary nozzles, which has been conventionally used, the cleaning pump 26 can be operated, and the same effects as those of the first embodiment can be obtained. Since it is injected, the cleaning performance is dramatically improved.
[0064]
  The water diversion means 37 injects the washing water in the order of the washing means 27a and 27b, the washing means 27b and 27c, the washing means 27c and 27d, and the washing means 27d and 27a. However, if the injection pressure from below is set higher than above, the cleaning power can be maintained by high-pressure injection from below without losing the injection from above.
[0065]
  On the other hand, if the flow rate injected from above is set higher than the downward direction, it can be washed away at a flow rate exceeding the injection from below, so that the effect of washing out the re-adhered matter and the like is not affected, and high rinsing performance can be maintained.
[0066]
  (Example 3)
  As shown in FIG. 9, the cleaning means is provided with two rotating nozzles below the tableware basket and one fixed nozzle on the back surface for cleaning. The basic configuration is the same as that of the first embodiment, and is provided with fixed cleaning means 27e having injection ports on the left and right sides of the back surface. Since the cleaning means has three branches, the time for spraying from one cleaning means 27 is 1.3 times.
[0067]
  For this reason, the energy injected from the bottom increases, and the cleaning power of potatoes with a large cleaning load increases. On the other hand, although the amount of injection from above decreases, in the case of a fixed nozzle, there is no leakage loss of the shaft portion as in the case of a rotating nozzle, and no pressure is required for injection from above. It is sufficiently possible to flow a flow rate (total amount) equivalent to 1, and the washing water is sprayed from above to almost the entire area of the dish basket 24 in the substantially rectangular washing tank 22 while minimizing the number of washing means 27. Sufficient cleaning performance and rinsing performance can be ensured.
[0068]
  Further, the shape of the cleaning means 27e is different in height on the left and right sides, and in particular, the object to be cleaned 23 near the center can be cleaned from directions with different angles and heights, and the cleaning performance can be further improved.
[0069]
  Even if the cleaning means 27e is provided on the door side or the door, the same effect can be obtained. Moreover, as shown in the figure, when the cleaning path 43 is raised at the center on the back side of the cleaning tank 22, it becomes possible to provide a flow path of a size sufficient for water supply without interfering with the locus of the lower rotating nozzle, Necessary water power for each of the upper and lower sides can be secured.
[0070]
  Further, since the number of the cleaning means 27 is reduced, there is an advantage that the cost can be reduced. Further, as shown in FIG. 10, even when the injection port is provided only on one side of the back surface, the effect can be obtained within the injection range, which is effective.
[0071]
  (Example 4)
  As shown in FIG. 11, the cleaning means 27 includes two rotary nozzles 27a and 27b below the tableware basket 24 and two rotary nozzles 27c and 27d between a plurality of vertical cleaning baskets. , To wash.
[0072]
  The basic configuration is the same as that of the first embodiment, and as shown in the figure, the tableware basket 24 is divided into two upper and lower stages, can accommodate a large capacity, and can be used for various usage forms of users. It has become. In this case, since the height of the apparatus is also high, the lower two cleaning means 27a and 27b are not sufficient, and it is effective to provide the cleaning means 27c and 27d between the upper and lower baskets. By using the water dividing means 37, it is possible to wash with a small amount of water while providing a large number of injection ports, which is effective.
[0073]
  In addition, there is a method in which the four cleaning units 27a, 27b, 27c, and 27d are sequentially sprayed at a predetermined interval, or there are two cleaning units 27a and 27b sprayed from below as a single cleaning path 43. May be injected.
[0074]
【The invention's effect】
  As described above, according to the present invention, highly efficient cleaning with higher cleaning performance and rinsing performance can be performed.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a dishwasher according to a first embodiment of the present invention.
FIG. 2 is a side sectional view of the dishwasher according to the first embodiment.
FIG. 3 is a cross-sectional view of the water distribution means of the dishwasher according to the first embodiment.
FIG. 4 is a schematic plan view of the inside of the washing tub of the dishwasher according to the first embodiment as viewed from above.
FIG. 5 is a cross-sectional view of another water distribution means of the dishwasher of the first embodiment.
FIG. 6 is a cross-sectional view of another water distribution unit of the dishwasher of the first embodiment.
FIG. 7 is a view showing an example of the arrangement of other cleaning means in the dishwasher of the first embodiment.
FIG. 8 is a partially cutaway front view of the dishwasher of the second embodiment.
FIG. 9 is a partially cutaway front view of the dishwasher of the third embodiment.
FIG. 10 is a view showing an example of the arrangement of other cleaning means in the dishwasher of the third embodiment.
FIG. 11 is a partially cutaway front view of the dishwasher according to the fourth embodiment.
FIG. 12 is a side sectional view of a conventional dishwasher.
[Explanation of symbols]
  22 Washing tank
  23 Objects to be cleaned
  24 Tableware basket
  26 Washing pump
  27 Cleaning means
  37 Water diversion means

Claims (8)

A dish basket for setting an object to be cleaned, a washing tank for storing the dish basket, a washing pump for pressurizing washing water, a plurality of washing means having an injection port for injecting washing water into the washing tank, a diversion means for switching the cleaning means cleaning water from the cleaning pump is supplied, a control means for controlling the supply of the washing water into the washing means wherein the control means, the washing water by the diversion means In addition to spraying sequentially from a plurality of cleaning means, in the final rinsing step, the spraying time from the cleaning means spraying from above toward the object to be cleaned set in the tableware basket is set longer than the spraying time from other cleaning means. dishwasher. A dish basket for setting an object to be cleaned, a washing tank for storing the dish basket, a washing pump for pressurizing washing water, a plurality of washing means having an injection port for injecting washing water into the washing tank, A water distribution unit that switches a cleaning unit to which cleaning water is supplied from a cleaning pump; and a control unit that controls the supply of the cleaning water to the cleaning unit. The control unit supplies the cleaning water by the water distribution unit. A dishwasher in which spraying is performed sequentially from a plurality of cleaning means, and in the final rinsing step, the interval between water splits is increased and the spraying time from the cleaning means is longer than that in the cleaning step . 3. The dishwasher according to claim 1 , wherein the water diversion means is configured to rotate the valve body with a drive motor . 3. The dishwasher according to claim 1 , wherein the water diversion means is configured to rotate the valve body by ON / OFF operation of the washing pump . The dishwasher according to claim 1 or 2, further comprising two washing means that are branched by water splitting means and spray from the back side of the washing tank . The dishwasher according to claim 1 or 2 , wherein the time of spraying from each of the cleaning means is about 10 seconds to 1 minute . The dishwasher according to claim 1 or 2, wherein a planar shape of the washing tank is formed in a substantially rectangular shape, and a plurality of washing means are provided below the dish basket. Cleaning means provided more below the dishes basket is configured with claims 7 machines have dishwashers according to inject the cleaning water simultaneously.

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