JP5146331B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher that efficiently jets washing water to an object to be cleaned such as tableware.

  A conventional general dishwasher has a configuration as shown in FIGS. As shown in FIG. 7, the dishwasher main body 101 has a washing tank 102, and supplies water or hot water into the washing tank 102 by a water supply valve 103. A drain port 104 is provided at the bottom of the cleaning tank 102, and a cleaning pump 105 connected to the drain port 104 and driven by a motor is attached. The cleaning pump 105 supplies cleaning water into the cleaning tank 102 for circulation. It is composed. The drainage port 104 has a leftover filter 106 for collecting leftovers.

  The cleaning water supplied into the cleaning tank 102 passes through the leftover filter 106 and is sucked into the cleaning pump 105, and is supplied from the cleaning pump 105 to the cleaning nozzle 107 provided at the bottom of the cleaning tank 102. The washing water sprayed from the washing nozzle 107 circulates along a route that returns to the drain port 104 again after washing the dishes 109. At this time, the leftovers etc. dropped from the tableware 109 flow into the leftover filter 106 together with the washing water, and the leftovers having a size that does not pass through the leftover filter 106 are collected by the leftover filter 106.

  The tableware basket 110 which can arrange the tableware 109 in order and injects washing water with respect to the tableware 109 effectively is installed. The drainage pump 111 discharges wash water from the drainage hose 112 to the outside of the machine.

  However, it has been difficult to efficiently clean the dishes 109 set in the upper part of the dish basket 110 or the complicatedly shaped dishes 109 by the conventional washing water injection technique only from below.

Therefore, a dishwasher having a plurality of washing nozzles 113a, 113b, 113c, 113d as shown in FIG. 8 has also been proposed. In addition, when all of the plurality of cleaning nozzles 113a, 113b, 113c, and 113d are ejected at the same time, the amount of water that is required increases, resulting in increased costs and vibration and noise problems due to the use of a large amount of water. Therefore, the water diversion means 114 is used for washing with a small amount of water. The supply of cleaning water is sequentially switched to the cleaning nozzles 113a, 113b, 113c, and 113d provided in the cleaning tank 102 using the water diversion means 114 so that the cleaning water is supplied to the respective cleaning nozzles for a certain period of time. (For example, refer to Patent Document 1).
JP 2001-218721 A

  However, in this conventional configuration, among the plurality of cleaning nozzles, the used cleaning nozzle is grasped, and the operation of each cleaning nozzle is performed according to the amount of tableware installed in different places and the degree of dirt. The time could not be adjusted.

  The present invention solves the above-described conventional problems, and the amount of tableware corresponding to each cleaning nozzle can be easily and reliably grasped from among a plurality of cleaning nozzles. A dishwasher that can be washed in consideration of the difference in the degree of dirt, place, and dirt.

In order to solve the above-described conventional problems, a dishwasher according to the present invention includes a washing tank for storing an object to be washed, a water supply valve for supplying water to the washing tank, a washing pump for pressurizing washing water, a plurality of cleaning nozzles for jetting washing water to the object to be cleaned while being disposed in the cleaning tank, content supplying washing water sent from the washing pump sequentially switches on at least one of said plurality of cleaning nozzles A water means and a current detection means for detecting a current value to be supplied to a motor that drives the cleaning pump, and controlling the water supply valve so that a smaller amount of water is supplied to the cleaning tank at the start of cleaning. in most flow when supplying cleaning water to the cleaning nozzles in need of said wash pump to operate the wash pump while entrained air, said current detecting means at that time among the plurality of cleaning nozzles So as to detect the position where the wash water Ru is supplied to the cleaning nozzle that requires the most flow by the current value detecting, then again controls the water supply valve, the line normal amount of water in the washing tub The cleaning pump is operated according to the plurality of cleaning nozzles .

  As a result, it is possible to easily and reliably determine which cleaning nozzle is used from among a plurality of cleaning nozzles, and it is possible to perform cleaning in consideration of the amount and location of tableware corresponding to each cleaning nozzle and the degree of contamination. .

  The dishwasher of the present invention can easily and surely determine the used washing nozzle among a plurality of washing nozzles, taking into consideration the difference in the amount and location of the dishes corresponding to each washing nozzle, and the degree of contamination. Efficient cleaning.

A first aspect of the present invention is a cleaning tank that accommodates an object to be cleaned, a water supply valve for supplying water to the cleaning tank, a cleaning pump that pressurizes the cleaning water, and a cleaning water that is disposed in the cleaning tank. A plurality of cleaning nozzles for spraying the object to be cleaned, a water distribution means for sequentially supplying cleaning water sent from the cleaning pump to at least one of the plurality of cleaning nozzles, and a motor for driving the cleaning pump Current detecting means for detecting a current value to flow through, and at the start of cleaning, by controlling the water supply valve so as to supply a smaller amount of water to the cleaning tank than a normal amount, the flow rate of the plurality of cleaning nozzles is the highest. when supplying the cleaning water to the cleaning nozzles that require the while the wash pump entrainment air to operate the wash pump, the most flow by a current value the current detecting means when the senses 必 Washing water to the washing nozzle so as to sense the position that will be supplied to, then, again controls the water supply valve, have rows normal amount of water in the cleaning tank, depending on the plurality of cleaning nozzles The washing pump is configured to operate . With this configuration, it is possible to easily and reliably determine the cleaning nozzle that requires the most flow out of a plurality of cleaning nozzles, taking into account differences in the amount and location of dishes corresponding to each cleaning nozzle, and the degree of contamination. Efficient cleaning is possible.

Further, when the washing begins, by controlling the water supply valve to perform a small amount of water supply to the washing tank from the usual amounts, the washing water in the case of supplying at least one cleaning nozzle of the plurality of cleaning nozzles, wash pump to be operated with entrainment air, then again by controlling the water supply valve, by which the washing water flow rate sufficient to all washing nozzle configured to supply the water of the usual amounts to be supplied to the washing tub A special component is used to eject a sufficient amount of cleaning water from any of the cleaning nozzles after easily and surely identifying the cleaning nozzles used from among the plurality of cleaning nozzles. It can be realized without.

Further, according to a second invention, in the first invention, the plurality of cleaning nozzles are configured such that the amount of water required to eject the cleaning water without involving air in the cleaning pump is different from each other. It is possible to detect and identify the spray nozzle that has been sprayed by supplying air to the cleaning nozzle that has the largest amount of water for supplying cleaning water without involving air in the cleaning nozzle. it can.

Further, in the third invention according to the second invention, since the length of the path connecting the cleaning pump and the plurality of cleaning nozzles is different from each other in each of the plurality of cleaning nozzles, a simple configuration is provided. It is possible to efficiently clean dishes placed at different positions. Moreover, the washing water path to the washing pump and each washing nozzle can be arbitrarily arranged.

Further, in the fourth aspect of the present invention, in the second aspect of the present invention, the path connecting the cleaning pump and the plurality of cleaning nozzles is configured such that each of the plurality of cleaning nozzles has a different cross-sectional area. Even if the relative position of each cleaning nozzle from the cleaning pump is the same or almost the same, each cleaning nozzle can set the washing water injection capacity according to the type of object to be cleaned. can do.

Further, in the fifth invention, in the first to fourth inventions, the time for supplying the cleaning water to the plurality of cleaning nozzles is different for each of the plurality of cleaning nozzles. On the other hand, cleaning water can be jetted for a long time.

Further, in the sixth aspect of the invention, in the first to fifth aspects of the invention, the number of rotations of the motor when the cleaning water is sprayed from the plurality of cleaning nozzles is different from each other in each of the plurality of cleaning nozzles. Therefore, it is possible to intensively clean the relatively dirty cleaning object without extending the length.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a partially cut front view of a dishwasher according to Embodiment 1 of the present invention, FIG. 2 is an enlarged cross-sectional view of a main part around the water dividing means of the dishwasher, and FIG. 3 is a water dividing means of the dishwasher. It is the side view and perspective view of a closure member.

  In FIG. 1, a washing tub 2 is provided inside the main body 1 of the dishwasher, and a dish basket 10 in which objects to be cleaned such as dishes 9 can be placed in and out of the washing tub 2. It is stored in.

  Each of the cleaning nozzles 13a, 13b, 13c, and 13d has a plurality of injection ports 13e, passes through a plurality of cleaning water paths 16 that communicate with the cleaning nozzles 13a, 13b, 13c, and 13d from the cleaning pump 5, respectively. Wash water is jetted. The cleaning nozzles 13a and 13b spray cleaning water from below the table basket 10, and the cleaning nozzles 13c and 13d spray cleaning water from above. Among the cleaning nozzles, the cleaning nozzle 13c provided on the upper right side in the cleaning tank 2 is the cleaning water path that requires the most flow rate. Each cleaning nozzle rotates around the cleaning nozzle axis during ejection. A cleaning nozzle fixed without rotating can also be configured.

  As shown in FIG. 2, the water diversion means 17 serving as a switching valve that sequentially supplies the washing water pumped from the washing tank 2 by the washing pump 5 to the washing nozzles 13a, 13b, 13c, and 13d. The water passage portion 18 has an inlet 19 for introducing the water pressurized by the cleaning pump 5 and outlets 20a to 20d for leading the introduced water to the cleaning nozzles 13a, 13b, 13c and 13d (details are shown in the figure). 4)). In the inside of the water flow section 18, a closing member that is guided by the guide shaft 33 between the inlet 19 and the outlets 20a to 20d and reciprocates up and down, and sequentially closes the outlets 20a to 20d while rotating intermittently. 21 is provided. In association with the reciprocating motion of the closing member 21, cam mechanisms 22 and 23 that act to rotate by a predetermined angle in one direction are provided on the upper and lower surfaces of the closing member 21, respectively.

The closing member 21 is configured as shown in FIGS. 3A to 3C and mainly includes a disk 26 having a notch 24 and a flat portion 25 on the upper surface. The sliding surfaces 27 a and 27 b are provided on the upper surface of the disk 26 and constitute the cam mechanism 22. The sliding surfaces 27 a and 27 b have an inclination and are connected on the same circumference with the approximate center of the disk 26 as an axis. The sliding surface 28 forms the cam mechanism 23 on the lower surface of the disk 26, has an inclination, and is continuous on the same circumference with the approximate center of the disk 26 as an axis. A guide hole 29 is provided at substantially the center of the disk 26 when the closing member 21 is guided by the guide shaft 33 to reciprocate up and down and rotate intermittently.

  4 shows a cross section indicated in FIG. 2, FIG. 4 (a) is a cross section taken along line AA in FIG. 2, FIG. 4 (b) is a cross section taken along line BB in FIG. 4 (c) shows a cross section taken along line CC in FIG. 2, and FIG. 4 (d) shows a cross section taken along line DD in FIG. As shown in FIG. 4A, the outlet for leading water to the cleaning nozzles 13a, 13b, 13c, and 13d is composed of four outlets 20a to 20d. The outlet 20a guides water to the lower left cleaning nozzle 13a. The outlet 20c leads water to the upper right washing nozzle 13c, the outlet 20d leads water to the side washing nozzle 13d, and the outlet 20b leads water to the lower right washing nozzle 13b.

  The outlets 20a to 20d have an opening surface 30 on the same flat surface, and face the flat portion 25 on the closing member 21, and the hole diameter D1 of the opening surface 30 is set smaller than the outer diameter D2 of the flat portion 25. doing. When the closing member 21 reciprocates between the inlet 19 and the outlets 20a to 20d in the direction of moving back and forth with respect to the opening surface 30, the flat portion 25 abuts on the opening surface 30 in a watertight manner, and the notch on the closing member 21 is cut. Any one of the outlets 20a to 20d corresponding to the position of 24 is an outlet for leading water to the washing nozzle, and the remaining three of the outlets 20a to 20d are blocked.

  FIG. 5 is an example showing a state in which the closing member 21 is raised and the flat portion 25 is in contact with the opening surface 30. In this case, the outlets 20a, 20c, and 20d are closed, and only the outlet 20b is closed. Opening as an outlet, water is led to the washing nozzle 13b.

  If the movement when the closing member 21 moves upward is the forward path, and the movement when moving downward is the backward path, the flat portion 25 of the blocking member 21 contacts the opening surface 30 at the end of the forward path. At the end, the flat portion 25 of the closing member 21 has a predetermined gap from the opening surface 30. When the forward path and the return path are moved once each, the reciprocating motion is performed once. During this time, the cam mechanisms 22 and 23 cause the closing member 21 to move to the inside of the outlets 20a to 20d around the central axis 31 of the guide hole 29. , It is set to rotate by an angle formed by two adjacent outlets.

  Therefore, when the closing member 21 descends from the state of FIG. 5 and moves to the end of the return path, and then the closing member 21 rises and moves to the end of the outward path, the closing member 21 is formed by an angle formed by the outlet 20b and the outlet 20c. , The outlets 20a, 20b, and 20d are blocked, only the outlet 20c is opened as an outlet, and water is led out to the cleaning nozzle 13c on the upper right side.

  The reciprocating motion of the closing member 21 is mainly performed by the hydraulic force of the water pressurized by the cleaning pump 5 and the gravity acting on the closing member 21 itself. Gravity always acts on the closing member 21, but since the hydraulic force generated by the cleaning pump 5 is much larger than the gravity acting on the closing member 21, the time when the closing member 21 is subjected to the hydraulic force almost ignores the effect of gravity. be able to. Therefore, the closing member 21 reciprocates by alternately operating and stopping the cleaning pump 5.

  In this way, the closing member 21 rotates a predetermined angle around the central axis 31 of the guide hole 29 while reciprocating up and down between the inlet 19 and the outlets 20a to 20d, so that there are three outlets 20a to 20d at the same time. One by one, the outlets 20a to 20d are sequentially opened. For example, when the rotation direction of the closing member 21 is the direction shown in FIG. 5, the opening is made in the order of 20a → 20b → 20c → 20d → 20a, and accordingly, the cleaning nozzle 13a → the cleaning nozzle 13b → the cleaning nozzle 13c → the cleaning. The water is derived by sequentially switching from the nozzle 13d to the washing nozzle 13a.

  As shown in FIG. 6, the cleaning water is sequentially switched from the cleaning pump 5 to the cleaning nozzles 13 a, 13 b, 13 c, and 13 d through the water diversion unit 17, but the cleaning pump 5 supplies the cleaning nozzles 13 a, 13 b, When the flow path load in the washing water path 16 up to 13c and 13d or the load for washing nozzle injection is different, the current value of the motor that drives the washing pump 5 changes.

  In the present invention, the change in the current value is read by a current transformer, which is a current detecting means installed on an electronic board for starting the washing pump motor, and the switching position of the water dividing means 17 and the washing water are supplied. In this configuration, the position of the cleaning nozzle is detected and specified.

  With such a configuration, for example, when cleaning water is sprayed from the cleaning nozzle 13c by the water diverting means 17, a load is applied to the motor of the cleaning pump 5, so that a difference occurs in the current value flowing through the cleaning pump motor. Then, it is detected that the cleaning water is sprayed to the cleaning nozzle 13c, and the spraying from the cleaning nozzle 13c is stopped after a predetermined time has elapsed. Thereafter, the washing water path 16 is changed again by the water distribution means 17 and another washing nozzle injection is started. However, it is known in advance that the most flow rate is required. Washing is performed at an appropriate jetting time and pump motor speed.

  Therefore, the degree of dirt and the position of each tableware 9 arranged in the cabinet, such as washing away the stickiness of dried rice grains in a short time and washing only the tableware 9 arranged below the tableware basket 10, Suitable and efficient cleaning can be realized.

  Further, by using it in combination with a turbidity sensor that detects the degree of dirt of the washing water arranged in the washing water path 16, the dishware 9 having severe curry dirt arranged under the tableware basket 10 is automatically used. Taking into account the degree of soiling of tableware 9 arbitrarily arranged in the tableware basket 10 such as detection and intensive cleaning, and tableware, the injection time of the cleaning nozzles 13a, 13b, 13c and 13d and the rotational speed of the pump motor are determined. Automatic control and efficient cleaning can be performed.

  In addition, by intentionally entraining the cleaning pump 5 with air, detecting the position of the cleaning nozzle 13c that requires the most flow rate, and then performing re-watering, each cleaning nozzle has a sufficient flow rate. It is also possible to perform cleaning with an injection time suitable for the cleaning nozzle and the rotation speed of the pump motor. According to this configuration, after the cleaning nozzles that are used, particularly, the cleaning nozzles that require the most flow rate among the plurality of cleaning nozzles 13a, 13b, 13c, and 13d are determined easily and reliably, Injecting a sufficient amount of cleaning water from the cleaning nozzle can be realized without using any special component.

  That is, the cleaning water path 16 from the cleaning pump 5 to each of the cleaning nozzles 13a, 13b, 13c, and 13d is different in length, path cross-section, and relative height, and the shape of the cleaning nozzle, the shape of the nozzle of the cleaning nozzle, Since the position and number are also different, the load applied to the cleaning pump 5 is also different. Therefore, when the cleaning pump 5 is intentionally supplied to the cleaning nozzle 13c having the largest required flow rate in the cleaning water path 16 from the cleaning pump 5 to the cleaning nozzle, air is entrained in the cleaning pump 5. As shown in FIG. 6, the current value of the motor that drives the cleaning pump 5 is lower than in the case of the other cleaning nozzles 13a, 13b, and 13d, so that the difference in the current value can be more discriminated, and the position of the cleaning nozzle 13c. The position of the cleaning nozzle to which the cleaning water is supplied can be determined based on the above.

In addition, the length of the cleaning water path 16 to the cleaning pump 5 and each of the cleaning nozzles 13a, 13b, 13c, and 13d and the cross-sectional area of the cleaning water path 16 are configured to be different from each other, so that they are arbitrarily arranged in the tableware basket 10. The curry pan can be cleaned with high pressure for a long time, for example, and the cleaning can be performed with the nozzle injection time and the pump motor rotation speed considering the arrangement position of the tableware 9 and the degree of tableware contamination.

  For example, by shortening the operation time of the cleaning nozzle that is insufficient in flow rate and adjusting the operation time of each cleaning nozzle that satisfies the flow rate, cleaning of the tableware 9 can be efficiently performed due to the difference in the installation position of the tableware 9 Can be done automatically. Moreover, if the tableware 9 of the position which can be wash | cleaned with the washing nozzle with few required flow rates is wash | cleaned, the amount of water used can be reduced intentionally. In addition, by performing position detection and controlling the number of rotations of the motor that drives the cleaning pump 5 with respect to each cleaning nozzle, cleaning water can be jetted from the cleaning nozzle at a rotation number suitable for each cleaning nozzle, Appropriate cleaning is possible.

  Further, when there is no significant difference in the cross-sectional area and path length of the cleaning water path 16 with respect to the cleaning pump motor load, the shape of each cleaning nozzle 13a, 13b, 13c, 13d, the shape and position of the nozzle of the cleaning nozzle, By changing the number and the like, cleaning can be performed while detecting the positions of the cleaning nozzles 13a, 13b, 13c, and 13d.

  As mentioned above, the dishwasher concerning this invention can discriminate | determine the washing nozzle currently used among several washing nozzles. Therefore, at the time of washing | cleaning, the injection frequency of each washing nozzle, the injection time, and discharge pressure can be changed, and it is useful as a dishwasher etc. for which efficient washing | cleaning of tableware is desired.

1 is a partially cut front view of a dishwasher according to Embodiment 1 of the present invention. An enlarged cross-sectional view of the main part around the water diversion means of the dishwasher (A) Side view of the closing member of the water dividing means of the dishwasher (b) Top perspective view of the closing member of the water dividing means of the dishwasher (c) Bottom perspective view of the closing member of the water dividing means of the dishwasher (A) A cross-sectional view taken along line AA in FIG. 2 of the water diverting means of the dishwasher (b) A cross-sectional view taken along the line BB of FIG. 2 of the water diverting means of the dishwasher (c) The dishwasher 2 is a cross-sectional view taken along the line CC in FIG. 2 of the water diverting means (d) A cross-sectional view taken along the line DD in FIG. 2 of the water diversion means of the dishwasher The top view of the state which the obstruction | occlusion member and opening surface of the dishwasher contacted Explanatory drawing explaining the behavior of the electric current value which flows into the motor which drives the washing pump corresponding to each washing nozzle of the dishwasher Side view of a conventional dishwasher A partially cut front view of another conventional dishwasher

2 Washing tank 5 Washing pump 9 Tableware (objects to be washed)
13a, 13b, 13c, 13d Washing nozzle 17 Water diversion means 18 Water flow portion 19 Inlet 20a, 20b, 20c, 20d Outlet 21 Closure member 22, 23 Cam mechanism

Claims (6)

A cleaning tank for storing an object to be cleaned, a water supply valve for supplying water to the cleaning tank, a cleaning pump for pressurizing the cleaning water, and a cleaning water disposed in the cleaning tank and supplying the cleaning water to the object to be cleaned A plurality of cleaning nozzles to be ejected, a water distribution means for sequentially supplying cleaning water sent from the cleaning pump to at least one of the plurality of cleaning nozzles, and a current value flowing to a motor that drives the cleaning pump is detected. A cleaning nozzle that requires the most flow rate among the plurality of cleaning nozzles by controlling the water supply valve so that a smaller amount of water is supplied to the cleaning tank at the start of cleaning. the washing water in the case of supplying the cleaning Roh said while the wash pump entrainment air to operate the wash pump, and requires the most flow by the current value detecting said current detecting means at that time Wash water Le is configured to detect a position that will be supplied, then again controls the water supply valve, have rows usual amount of feed water to the washing tub, the washing pump in accordance with the plurality of cleaning nozzles Dishwasher configured to operate . 2. The dishwasher according to claim 1, wherein the plurality of washing nozzles are configured such that the amount of water required to eject washing water without involving air in the washing pump is different from each other. The dishwasher according to claim 2, wherein a length of a path for communicating the washing pump and the plurality of washing nozzles is different for each of the plurality of washing nozzles. The dishwasher according to claim 2, wherein a path connecting the washing pump and the plurality of washing nozzles has a cross-sectional area different from each other in each of the plurality of washing nozzles. The dishwasher according to any one of claims 1 to 4, wherein each of the plurality of cleaning nozzles has a different time for supplying the cleaning water to the plurality of cleaning nozzles. The dishwasher according to any one of claims 1 to 5, wherein the number of rotations of the motor when the washing water is jetted from the plurality of washing nozzles is different from each other in each of the plurality of washing nozzles.

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