JP2010194015A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher which is excellent in washing performance by catching fine food particles that used to hard to catch in a conventional construction and reducing reattachment to washed objects. <P>SOLUTION: The dishwasher includes: a food particle filter 9 provided at the lower part of the washing tank 3 for catching food particles contained in washing water; a second filter 13 having a mesh finer than that of the food particle filter 9; a plurality of washing nozzles 7 having jet ports for jetting the washing water pressured by a washing pump 6 into the washing tank 3; and a water dividing means 17 for selectively switching the washing nozzles 7 with which washing water is supplied by the washing pump 6. The jet ports are disposed so that the second filter 13 is placed higher than washing water level and at least one of the washing nozzles 7 passes washing water through the second filter 13. Thus, the fine food particles can be captured and reattachment of the food particles to the washed objects 4 can be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dishwasher that cleans dishes and the like by spraying washing water.

  A conventional dishwasher of this type has been configured as shown in FIG. The dishwasher main body 101 is provided with a washing tank 102 therein, and water or hot water is supplied into the washing tank 102 as washing water 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 is connected to the drain port 104 and driven by a motor. The cleaning pump 105 circulates cleaning water into the cleaning tank 102. is doing. Further, the drain port 104 is provided with a residue filter 106 that collects residue.

  That is, the cleaning water supplied into the cleaning tank 102 passes through the residual 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 inner bottom portion 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 tableware 109. At this time, the residue dropped from the tableware 109 flows into the residue filter 106 together with the washing water, and the residue having a size that cannot pass through the residue filter 106 is collected by the residue filter 106.

  Further, a heater 108 for heating the cleaning water is provided between the cleaning nozzle 107 and the bottom of the cleaning tank 102, and the tableware 109 can be arranged in an orderly manner above the cleaning nozzle 107, so that the cleaning water can be effectively supplied to the tableware. The tableware basket 110 constituted so that it may inject to 109 is installed, and it wash | cleans efficiently. Moreover, the drainage pump 111 discharges washing water out of the machine through the drainage path 112 (see, for example, Patent Document 1).

  However, in such a structure, since the washing water always passes through the place where the residue is accumulated, the residue tends to be fine, and this fine residue passes through the eyes of the residue filter 106 to the tableware 109. Had the problem of reattachment.

In order to solve the problem of the reattachment of the residue to the tableware 109, it is conceivable to narrow the eyes of the residue filter 106. However, if the eyes of the residue filter 106 are simply narrowed, clogging easily occurs. As a result, sufficient washing water may not be supplied to the washing pump 105 and the capacity may be reduced. Therefore, the filter eyes are connected to the suction side of the washing pump and the suction pump suction side. There was a configuration in which different sizes and relatively large residues were discharged outside the apparatus during the drainage process (see, for example, Patent Document 2).
JP 2003-339608 A JP 2003-339612 A

  However, even in the configuration of Patent Document 2 described above, the residue remains immersed in the washing water until the drainage step is performed, and thus the reattachment property is not sufficient.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a dishwasher having excellent cleaning performance by reducing reattachment of a residue to an object to be cleaned.

  In order to solve the above-described conventional problems, the dishwasher of the present invention collects a cleaning tank that contains an object to be cleaned such as tableware and a residue contained in cleaning water provided in a lower part of the cleaning tank. A first filter, a second filter that is finer than the first filter, a cleaning pump that pressurizes the cleaning water, and the cleaning water pressurized by the cleaning pump is injected into the cleaning tank. A step of cleaning the second filter, comprising: a plurality of cleaning means having an injection port; and a water diversion means for selectively switching the cleaning means to which cleaning water is supplied from the cleaning pump from the plurality of cleaning means. Or it arrange | positions in the position higher than the washing water level in a rinse process, and at least 1 of the said washing | cleaning means has arrange | positioned the injection nozzle so that washing water may pass the said 2nd filter. As a result, it is possible to capture the fine residue that was difficult to capture in the conventional configuration, reduce reattachment of the residue to the object to be cleaned, and realize a dishwasher with excellent cleaning performance. .

  As described above, according to the present invention, it becomes possible to capture a fine residue that has been difficult to capture in the conventional configuration, and it is possible to reduce the reattachment of the residue to an object to be cleaned, and to improve the cleaning performance. An excellent dishwasher can be realized.

  The invention according to claim 1 is a cleaning tank for storing an object to be cleaned such as tableware, a first filter for collecting a residue contained in cleaning water provided in a lower part of the cleaning tank, and the first A plurality of washings having a second filter finer than one filter, a washing pump for pressurizing the washing water, and an injection port for injecting the washing water pressurized by the washing pump into the washing tank And a water diversion unit that selectively switches the cleaning unit to which the cleaning water is supplied from the cleaning pump from the plurality of cleaning units, and the second filter is disposed at a level higher than the cleaning water level in the cleaning step or the rinsing step. It is disposed at a high position, and at least one of the cleaning means is provided with an injection port so as to allow the cleaning water to pass through the second filter, and captures a fine residue. Possible and residual cleaning Can reduce the re-attachment to the object can be achieved an excellent dishwasher cleaning performance.

  The invention according to claim 2 is the above first invention, wherein the first filter and the second filter are integrated, and both filters are simultaneously taken out by one operation when cleaning the filter. This makes it easy to use a dishwasher.

  A third aspect of the present invention is the first or second aspect of the present invention, further comprising a tableware basket in which an object to be cleaned such as tableware is set, and the second filter disposed at a position lower than the tableware basket. Therefore, by preventing the cleaning water containing fine residue captured by the second filter from being applied to the object to be cleaned, it is possible to further reduce the reattachment of the residue to the object to be cleaned. An excellent dishwasher can be realized.

  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)
1 is a side sectional view of the dishwasher according to Embodiment 1 of the present invention, FIG. 2 is a plan sectional view of the dishwasher, FIG. 3 is a perspective view of a residual filter unit of the dishwasher, and FIG. 4 is a dishwasher. 5 is an exploded perspective view of the water diverting means of the dishwasher, FIG. 6 is a cross-sectional view of the water diverting means of the dishwasher when the washing pump is in operation, and FIG. It is expansion | deployment explanatory drawing of the engaging part of a water diversion means.

As shown in FIG. 1 and FIG. 2, a washing tub 3 in which an opening provided on the front surface can be opened and closed by a door 2 is provided inside the dishwasher body 1, and an object to be cleaned 4 such as tableware is a dish basket 5 And is accommodated in the cleaning tank 3.

  At the inner bottom of the cleaning tank 3, there is a drain port 8 communicating with the suction side of the cleaning pump 6. The drain port 8 is provided with a residue filter 9 for collecting residue and a heating element 10 for heating. A temperature sensor 11 for detecting the temperature of the cleaning tank 3 is provided on the outer bottom of the cleaning tank 3.

  A gripping member 12 is attached to the remaining filter 9 in order to facilitate installation and removal from the cleaning tank 3. Further, a second filter 13 having a finer mesh than the residual filter 9 is attached to the gripping member 12 to form an integrated residual filter unit as shown in FIG.

  The second filter 13 is provided at a position higher than the cleaning water level in the cleaning process or the rinsing process, and is not immersed in the cleaning water accumulated in the cleaning tank 3. The second filter 13 is disposed at a position lower than the tableware basket 5.

  The cleaning pump 6 pressurizes the cleaning water, supplies it to a cleaning nozzle 7 (cleaning means) provided with a plurality of injection ports, and jets the cleaning water from the cleaning nozzle 7. The washing nozzle 7 is disposed so that the sprayed water 7a is sprayed from below the table basket 5, 7b is sprayed from the upper right, 7c is sprayed from the upper left, and the sprayed cleaning water passes through the second filter 13. It is installed at 4 locations of 7d.

  The cleaning nozzle 7a is a rotating nozzle that automatically rotates around an axis by a jet of cleaning water. The cleaning nozzle 7d is provided at the inner bottom of the cleaning tank 3 at the center in the depth direction at the left and right positions corresponding to the second filter 13, and does not spray the cleaning water toward the object 4 to be cleaned. Then, the fuel is injected toward the second filter 13 from an injection port provided toward the front. That is, the cleaning nozzle 7d is provided exclusively for the purpose of collecting fine dirt contained in the cleaning water in the second filter 13 and preventing it from flowing into the cleaning pump 6 through the drain port 8.

  The blower 14 sends air into the cleaning tank 3 through the blower path 15 and discharges the exhaust from the exhaust port (not shown) to the outside of the machine.

  The discharge path 16 of the cleaning pump 6 is provided with a water distribution means 17 that selectively switches the cleaning nozzle 7 that supplies the cleaning water. The water distribution means 17 has the structure shown in FIGS. ing.

  A casing 20 having an inflow portion 18 into which cleaning water pressurized by the cleaning pump 6 flows and four outflow portions 19a to 19d communicating with the four cleaning nozzles 7a to 7d, respectively, are movable in the casing 20 The valve body 21 is provided with one opening 22 through which the washing water passes.

  The four outflow portions 19a to 19d are connected to the cleaning nozzles 7a to 7d through the cleaning path 23, respectively. A pair of upper engaging portions 24 configured by a cam provided on the lower surface of the upper surface of the casing 20 and a cam provided on the upper surface of the valve body 21 and rotating the valve body 21 by a predetermined angle when the valve body 21 is raised, And a cam provided on the lower surface of the casing 20 and a cam provided on the lower surface of the valve body 21, and a set of lower engaging portions 25 for rotating the valve body 21 by a predetermined angle when the valve body 21 is lowered. It is installed.

4 and the like are conceptual diagrams. In actuality, the casing 20 has a structure in which the casing 20 is divided into two parts in the vertical direction and joined by screwing, fitting, welding, welding, or the like. In addition, when the cleaning tank 3 is made of resin, a part of the casing 20 can be formed integrally with the bottom surface of the cleaning tank 3.

  The operation and action of the above configuration will be described. First, the basic operation of the dishwasher will be described. An object to be cleaned 4 such as tableware is set in a tableware basket 5 and stored in the washing tub 3, and after the detergent is put in, the door 2 closes the opening of the dishwasher main body 1 and starts operation. A cleaning process for removing dirt on the object to be cleaned 4, a rinsing process for pouring the attached detergent and residue, and a drying process for drying water suitable for the object to be cleaned 4 are performed in this order.

  First, a water supply valve (not shown) is operated to supply a predetermined amount of cleaning water to the cleaning tank 3, and then the cleaning water is pressurized by the cleaning pump 6, and the cleaning water is jetted from the cleaning nozzle 7. At this time, the heating element 10 such as a sheathed heater provided in the cleaning tank 3 is energized, and the cleaning process is performed while heating the cleaning water. Further, the temperature sensor 11 detects the temperature of the cleaning tank 3 and stops energization of the heating element 10 when the temperature becomes equal to or higher than a predetermined temperature.

  The washing water passes through the residual filter 9 and is sucked into the washing pump 6, supplied from the washing pump 6 to the washing nozzle 7 provided in the washing tank 3, and sprayed from the washing nozzle 7 to be washed. After washing 4, it circulates along the route of returning to the drain port 8 again. At this time, the residue or the like dropped off from the object to be cleaned 4 flows into the residue filter 9 together with the cleaning water.

  Since the residue filter 9 has an infinite number of holes having a diameter of about 1.5 mm, the residue having a size that cannot pass through the holes is collected by the residue filter 9. However, the residue finer than the eyes of the residue filter 9 is sucked into the cleaning pump 6 without being collected by the residue filter 9, and sprayed again from the cleaning nozzle 7 toward the object 4 to be cleaned together with the cleaning water. Will be. As a result, there arises a problem (reattachment) that the dirt once dropped by the cleaning water adheres to the object 4 again.

  In addition to the re-adhesion caused by fine dirt that has passed through the eyes of the residual filter 9 originally attached to the object 4 to be cleaned, there is a relatively large residual collected by the residual filter 9. It is also caused by crushing and becoming finer. As can be seen from FIG. 1, the residue collected by the residue filter 9 tends to be fine because it is always immersed in the washing water.

  As a means for improving the reattachment, a method of narrowing the eyes of the residual filter 9 can be considered. However, if the remaining filter 9 is made finer, the filter may be easily clogged due to the residue. When the residual filter 9 is clogged, the ability to be washed due to the fact that sufficient washing water is not supplied to the washing pump 6, that is, the discharge pressure of the washing water is lowered, and the object to be washed 4 cannot be washed.

  In order to solve this problem, in the present embodiment, the second filter 13 having a finer mesh than the residual filter 9 is provided at a position higher than the cleaning water level. The second filter 13 has innumerable holes with a diameter of about 1 mm, and fine dirt that passes through the residual filter 9 can be collected. In addition, since the residue is higher than the washing water level, the collected residue is not immersed in the washing water, so it is difficult to become fine.

Here, operation | movement and an effect | action of the water diversion means 17 which are the characteristic structures of this Embodiment are demonstrated. As shown in FIGS. 4 to 6, the casing 20 has a substantially cylindrical shape, the axial direction of the casing 20 is arranged in a substantially vertical direction, and the inflow portion 18 into which the cleaning water pressurized by the cleaning pump 6 flows is a casing. Four outflow portions 19 a to 19 d communicating with the four cleaning nozzles 7 a to 7 d are installed on the upper surface of the casing 20. The valve body 21 that sequentially switches the four outflow portions 19a to 19d by rotating with the vertical movement in the casing 20 has a substantially planar disk shape, and its upper surface (the cam portion described later) And the surface A of the outflow portion 19 facing the valve body 21 are both planar.

  When the cleaning pump 6 is operated, the valve body 21 is lifted by an operation with substantially linear motion and rotation according to the inclination of the upper engagement portion 24 due to the pressure of the cleaning water flowing in from the inflow portion 18, and is shown in FIG. As described above, the predetermined outflow portion 19 (19a in FIG. 6) is fixed at a position where the predetermined outflow portion 19 is opened in alignment with the opening portion 22 of the valve body 21, and the washing water is supplied from the washing nozzle 7a communicating with the outflow portion 19a. Be injected.

  When the valve body 21 has finished rising and is in close contact with the surface A, which is the lower surface of the outflow portion 19, when viewed from directly below the valve body 21, the valve body 21 is provided at a position where washing water passes as shown in FIG. An upper engagement portion 24 configured by a cam provided on the lower surface of the upper surface of the casing 20 and a cam provided on the upper surface of the valve body 21 is set so that the opening 22 coincides with the predetermined outflow portion 19a. (Details of the upper engagement portion 24 are not shown in FIG. 6, which is a cross-sectional view. For details, see FIG. 7 described as a development view).

  Subsequently, once the cleaning pump 6 is stopped, the pressure that has pushed up the valve body 21 from below does not act, so the valve body 21 is lowered by its own weight. At this time, according to the inclination of the lower engagement portion 25 The robot descends while rotating and stops at a predetermined position indicated by a broken line in FIG.

  When the washing pump 6 is operated again, it is guided by the next inclination of the upper engagement portion 24, the valve body 21 is raised while rotating, and the opening portion 22 is communicated with the next outflow portion 19b. Cleaning water is sprayed from the cleaning nozzle 7b. Thus, by operating the cleaning pump 6 intermittently, the cleaning nozzle 7 from which the cleaning water is sprayed can be switched in the order 7a, 7b, 7c, 7d.

  FIG. 7 shows the relationship between the upper engaging portion 24 and the lower engaging portion 25 formed in a circular arrangement by extending them in a plane, and the operation and stop of the cleaning pump 6 are repeated. Thus, the position of the valve body 21 is sequentially switched while performing an operation combining a substantially linear motion in the vertical direction and a rotational motion. In the present embodiment, the valve body 21 is rotated 90 degrees by one stop and operation in order to switch to the four outflow portions 19.

  The upper and lower engaging portions are not limited to this configuration, and when the cleaning pump 6 is operated intermittently, the predetermined outlet portion 19 and the opening of the valve body 21 are operated during the operation of the cleaning pump 6. For example, the valve body 21 hardly rotates when the valve body 21 is lowered and rotates about 90 degrees when the valve body 21 is raised, or conversely, it rotates about 90 degrees when the valve body 21 is lowered and hardly rotates when the valve body 21 is raised. Good.

  By these actions, the cleaning water is not supplied to the four cleaning nozzles 7 at the same time, but the cleaning water is sequentially fed. The washing water can be jetted from. Therefore, contaminants attached to the tableware and the like can be washed in a short time, and highly efficient washing can be realized.

  In addition, since the number of cleaning nozzles 7 can be increased without increasing the amount of water supply, a cleaning system in which cleaning water is sprayed from multiple directions onto the object 4 to be cleaned such as tableware can be provided. Therefore, since the user can freely set the object 4 to be set in the tableware basket 5 without selecting the setting method such as the vertical placement and the downside placement, the dishwasher can be 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.

  In addition, if the time of spraying from one cleaning nozzle 7 is switched from several seconds to one minute, efficient cleaning can be performed, but at least one cleaning nozzle is used at least once during one cleaning or rinsing process. It is desirable to set so as to be injected from 7. Therefore, it may be set to about 10 to 30 seconds.

  Here, in the present embodiment, the cleaning water sprayed from one of the cleaning nozzles 7 d is configured to pass through the second filter 13. Thereby, fine dirt contained in the washing water is collected by the second filter 13 when the washing nozzle 7d is operated.

  As described above, since the washing nozzle 7 is switched in the order of 7a, 7b, 7c, 7d by the action of the water dividing means 17, the washing water periodically passes through the second filter 13 and becomes fine dirt each time. Will be collected. Therefore, reattachment to the tableware can be reduced, and excellent cleaning performance can be realized.

  Unlike the remaining filter 9, the second filter 13 is provided on a path from the cleaning water level of the cleaning water accumulated in the inner bottom of the cleaning tank 3 to the suction port of the cleaning pump 6 through the drain port 8. Therefore, the performance of the cleaning pump 6 is not deteriorated even if it is clogged due to a large amount of residue.

  Further, if a detection means (not shown) for detecting the cleaning nozzle 7 to which the cleaning water is supplied is used, the spraying time can be made variable for each cleaning nozzle 7 and more efficient cleaning can be performed. For example, the injection from the cleaning nozzle 7d does not directly contribute to the cleaning of the article 4 such as tableware. Therefore, if the spraying time from the cleaning nozzle 7d is shorter (for example, about 10 seconds) than the spraying time in the other cleaning nozzles 7a, 7b, 7c, it is possible to suppress the extension of the cleaning time due to the remaining collection. .

  As a detection means for detecting the cleaning nozzle 7 supplied with the cleaning water, a means for detecting the rotational position of the valve body 21, a means for detecting the pressure in the cleaning path 23, or a means for detecting the presence or absence of flowing water. Various methods 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 6 is operated / stopped.

  When the cleaning process for a predetermined time is completed, the cleaning water containing dirt is discharged outside the apparatus, and new cleaning water is supplied. The cleaning pump 6 is operated, and the cleaning water is sprayed again from the cleaning nozzle 7 to rinse the object 4 to be cleaned, such as detergent and residue. 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 step is performed about twice continuously. Finally, the washing water is discharged outside the apparatus, and the rinsing process is completed.

  Subsequently, the drying process is performed and the blower 14 is operated, whereby the outside air is blown into the cleaning tank 3, the object to be cleaned 4 is dried, and discharged from the exhaust port. At this time, the heating element 10 is energized, and evaporation of water droplets adhering to the object to be cleaned 4 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.

  When the operation is completed, the user opens the door 2 and takes out the object 4 to be cleaned from the cleaning tank 3. At the same time, it is necessary to take out these filters from the washing tank 3 in order to discard the residues collected in the residue filter 9 and the second filter 13.

At this time, if the residual filter 9 and the second filter 13 are independent, the filter removal operation must be performed in two steps, which is inconvenient. In addition, the possibility of forgetting to attach the filter during the next operation increases. Therefore, if the residual filter 9 and the second filter 13 are integrated as in the present invention, both filters can be taken out with a single operation, and a user-friendly dishwasher can be realized.

  As described above, the dishwasher according to the present invention is useful as a dishwasher having excellent cleaning performance because it prevents the residue from reattaching to the object to be cleaned.

Side sectional view of the dishwasher according to Embodiment 1 of the present invention. Plan sectional view of the dishwasher Perspective view of the residual filter unit of the dishwasher Perspective view of water diversion means of the dishwasher Exploded perspective view of water diversion means of the dishwasher Sectional view of the water washing means of the dishwasher when the washing pump is operating Explanatory drawing of the engaging part of the water diversion means of the dishwasher Side view of a conventional dishwasher

DESCRIPTION OF SYMBOLS 1 Dishwasher body 3 Washing tank 4 Object to be washed 5 Tableware basket 6 Washing pump 7, 7a, 7b, 7c, 7d Washing nozzle (washing means)
9 Remaining filter (first filter)
13 Second filter 17 Water diversion means 20 Casing 21 Valve body

Claims (3)

A cleaning tank for storing objects to be cleaned such as tableware, a first filter for collecting residues contained in cleaning water provided at a lower portion of the cleaning tank, and a first filter that is finer than the first filter. 2, a cleaning pump for pressurizing the cleaning water, a plurality of cleaning means having an injection port for injecting the cleaning water pressurized by the cleaning pump into the cleaning tank, and the cleaning water from the cleaning pump And a water diversion unit that selectively switches from the plurality of washing units, the second filter is disposed at a position higher than the washing water level in the washing step or the rinsing step, and At least one of the cleaning means is a dishwasher in which an injection port is provided to allow cleaning water to pass through the second filter. The dishwasher of Claim 1 which integrated the 1st filter and the 2nd filter. The dishwasher according to claim 1 or 2, further comprising a tableware basket for setting an object to be cleaned such as tableware, wherein the second filter is disposed at a position lower than the tableware basket.

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