JP4674523B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwashing machine for cleaning by washing water sprayed on an object to be cleaned such as dishware, and more particularly to a technique for bleaching an object to be cleaned.

  Conventionally, this type of dishwasher has a configuration as shown in FIG. 11 (see, for example, Patent Document 1). The configuration will be described below.

  The structure of the conventional dishwasher is demonstrated based on FIG. The main body 1 of the dishwasher is supported by a rail surface 30 provided on the side surface of the washing tub 3 via a washing tub 3, a tableware basket 5 for storing objects to be cleaned such as tableware, and a rotating roller 29. Yes. A door 2 is provided at the opening of the cleaning tank 3. Water supply is performed by opening the water supply valve 31, the water amount is detected by the water amount detection device 32, and the set amount is stored in the cleaning tank 3. The heating element 12 disposed in the cleaning tank 3 heats the cleaning water stored in the cleaning tank 3. The washing water pressurized by the washing pump 8 is sprayed by the washing means 9 installed below the washing tank 3 from below to the tableware stored in the tableware basket 5.

  In this way, by operating the cleaning pump 8, cleaning water is jetted from the cleaning means 9, and a main cleaning process is performed in which the cleaning water is cleaned while heating the cleaning water using a detergent, and then rinsing is performed while heating the cleaning water several times. The process then proceeds to a rinsing and rinsing process with heating to a predetermined temperature, and the dishes are washed. When washing is completed, the process enters a drying process for drying the dishes, and after the dishes are dried, the operation is terminated. Then, the door 2 is opened, the tableware basket 5 is pulled out, and the tableware is taken out. The control means 7 controls the operation of the cleaning pump 8 and the like.

In addition to the normal cleaning course, the operation course has a bleaching course that bleaches the objects to be cleaned, and can completely bleach dishes and the like.
JP 2001-190480 A

  However, in the conventional configuration, although a bleaching-only course is provided, the washing water is uniformly sprayed from the washing means 9 to the entire interior, and the bleaching power for the object to be washed is dispersed. Had the problem of not being enough.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a dishwasher that can effectively wash an object to be cleaned during a bleaching course operation.

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 washing pump for pressurizing washing water, and washing water pressurized by the washing pump to the washing tank. A plurality of cleaning means having injection ports for injecting, a water diversion means for switching the discharge path to the cleaning means supplied with cleaning water from the cleaning pump, and a course input means for selecting a standard cleaning course and a bleaching course When the bleaching course is selected, among the plurality of cleaning means, the cleaning means for injecting the cleaning water onto the pigmentation surface of the object to be cleaned is compared with other cleaning means. The cleaning water is sprayed in a concentrated manner.

As a result, in the plurality of cleaning means for cleaning all the objects to be cleaned in the cleaning tank, during the bleaching course operation, the cleaning means for injecting the cleaning water onto the pigmentation surface effective for bleaching the objects to be cleaned Washing water can be sprayed more concentrated than other washing means , and the object to be washed can be efficiently bleached.

  The dishwasher according to the present invention can bleach an object to be cleaned strongly in a short time with little loss of energy.

A dishwasher according to a first aspect of the present invention has a washing tank for storing an object to be washed, a washing pump for pressurizing washing water, and an injection port for injecting washing water pressurized by the washing pump into the washing tank. A plurality of cleaning means, a water distribution means for switching a discharge path to the cleaning means to which cleaning water is supplied from the cleaning pump, and a course input means for selecting a standard cleaning course and a bleaching course. When selected, the cleaning means that injects the cleaning water onto the pigment-deposited surface of the object to be bleached out of the plurality of cleaning means is more concentrated than the other cleaning means. As a result, during the bleaching course operation, a part of the cleaning means for efficiently injecting the cleaning water onto the pigmentation surface is effective in bleaching the object to be cleaned such as tableware among the plurality of cleaning means. Because you can Short time loss less energy, and can be strongly bleach the object to be cleaned.

A dishwasher according to a second aspect of the present invention is a cleaning tank for storing an object to be cleaned in a dish basket, a cleaning pump for pressurizing cleaning water, and cleaning water pressurized by the cleaning pump in the cleaning tank. A plurality of cleaning means having injection ports for spraying, and a cleaning hand to which cleaning water is supplied from the cleaning pump
A diversion means for switching the discharge path to the stage, and a course input means for selecting a standard washing course and a bleaching course, wherein the diversion means sequentially receives the wash water from a plurality of discharge paths communicating with the respective washing means. together switched to eject, when you choose bleaching course, cleaning means for injecting the cleaning water on pigmentation surface of the cleaning object bleaching located below the dishes basket is desired, other cleaning by the time to inject the wash water as compared to the means has to be longer, is located in the lower part of the effective dishes basket upon bleaching to be washed dishes such in the plurality of washing means during the bleaching course operation cleaning means for injecting cleaning water pigmentation surface in addition to being able to be used efficiently Te, since the jet washing water short from the washing means, located outside the bottom of the dishes basket, outside, etc. of the object to be cleaned also Can be washed away during loss of short time energy is small, and it is possible to strongly bleach the object to be cleaned.

  In particular, the third aspect of the present invention provides the diversion detection means for detecting the cleaning means supplied with the cleaning water from the cleaning pump of the first or second invention, so that the cleaning water is supplied during the bleaching course operation. When spraying from the cleaning means, it is possible to confirm whether or not the plurality of cleaning means are surely concentrated on some cleaning means effective for bleaching. If it is confirmed by the diversion detection means that the water diversion means operate normally and can be concentrated on some of the cleaning means, the operation is continued, and the water diversion means operate normally. If the washing water is concentrated on the other washing means, the operation can be corrected when the water separation detection means detects the abnormality. For this reason, even if some problem occurs and the diversion means does not operate normally, it is possible to detect and correct the situation, thus preventing loss of time and energy, and efficient bleach cleaning. It can be performed.

  According to a fourth aspect of the invention, in particular, the water distribution detection means of the third invention has temperature detection means for detecting the temperature of the discharge path for supplying the cleaning water from the water distribution means to the cleaning means, and the temperature detection means Detecting the temperature of the discharge path to the cleaning means that increases the spraying time when selecting the bleaching course, so that the cleaning water is jetted from several cleaning means in a concentrated manner during the bleaching course operation. Whether or not the cleaning water is reliably supplied to the cleaning means can be easily and reliably detected by the temperature change. Further, since it is not necessary to provide detection means for all of the plurality of washing means, the entire structure of the dishwasher can be simplified, so that the assembly becomes easy and the cost can be kept low.

  In the fifth aspect of the invention, in particular, the water diverting means of any one of the first to fourth aspects of the invention is configured such that the discharge path of the washing water is switched by rotating the valve body by turning on / off the washing pump. As a result, the water distribution means for switching the discharge path of the cleaning water does not require a drive device, so that the configuration can be simplified, the assembly can be facilitated, and the cost can be kept low.

  In the sixth aspect of the invention, in particular, the water diverting means of any one of the first to fourth aspects of the invention is driven by rotating the valve body by the driving motor and switching the discharge path of the cleaning water. Since the valve body can be rotated by controlling the motor for use, the certainty of switching the discharge path by the water diversion means is increased. In addition, since the drive motor can freely control the amount of rotation of the valve body, it is not obstructed by the switching order of the discharge path, and it is possible to switch the discharge path flexibly and effectively perform bleach cleaning. Is possible.

  In the seventh aspect of the invention, in particular, the water diversion means of any one of the first to fourth aspects of the invention is configured such that the discharge path for supplying the washing water from the washing pump to the washing means is switched by the electromagnetic valve. Since the discharge path can be switched by the water diversion means by highly reliable control of the solenoid valve, the reliability of the discharge path switching is increased. In addition, since the open flow path of the solenoid valve can be freely controlled, it is not obstructed by the switching order of the discharge path, and the flexible discharge path can be switched, enabling effective bleach cleaning. Become.

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

(Embodiment 1)
As shown in FIGS. 1 to 5, the dishwasher body 1 is provided with a washing tub 3 that can be opened and closed by a door 2, and an object to be cleaned 4 such as tableware is set in a tableware basket 5 and accommodated in the washing tub 3. is doing. A course input means 6 for selecting a standard cleaning course and a bleaching course is provided on the front surface of the main body 1, and a control means 7 is disposed at the lower part of the main body 1. A water supply valve (not shown) supplies cleaning water to the cleaning tank 3, and a cleaning pump 8 pressurizes the cleaning water and supplies it to a cleaning means (cleaning nozzle) 9 provided with a plurality of injection ports. Washing water is jetted from the washing means 9.

  The cleaning means 9 is installed at four locations 9a and 9b sprayed from below the tableware basket 5, and 9c and 9d sprayed from the back. The cleaning means 9a and 9b are rotating nozzles that rotate around the axis by a jet, 9c 9d are fixed nozzles that do not move, and each cleaning means 9 is provided with about 4 to 10 injection ports for injecting cleaning water. The bottom of the cleaning tank 3 has a drain port 10 communicating with the suction side of the cleaning pump 8. The drain port 10 is provided with a residue filter 11 for collecting residue and a heating element 12 for heating. A temperature sensor 13 for detecting the temperature of the tank 3 is provided.

  The drain pump 14 discharges the cleaning water in the cleaning tank 3. A blower (not shown) sends air to the cleaning tank 3 through a blower path (not shown) and discharges the exhaust from the exhaust port 15. The discharge path 16 of the cleaning pump 8 is provided with a water distribution means 17 for selectively switching the cleaning means 9 for supplying the cleaning water. The water distribution means 17 has the structure shown in FIGS. ing.

  The water diversion means 17 has a casing 20 having an inflow part 18 into which washing water pressurized by the washing pump 8 flows and four outflow parts 19 respectively communicating with the four washing means 9, and moves into the casing 20. The valve body 21 is provided with an opening 22 through which the wash water passes. A set of upper engaging portions 23 that rotate the valve body 21 by a predetermined angle when the valve body 21 is raised, and a set of lower engaging portions 24 that rotate the valve body 21 by a predetermined angle when the valve body 21 is lowered. Are respectively installed on the casing 20 side and the valve body 21 side.

  FIG. 5 is a view as seen from the lower side of the valve body 21, and the outflow portions 19 are connected to the cleaning means 9 through the discharge passages 16, respectively. The outflow portions 19 a are connected to the cleaning means 9 a through the discharge passages 16 a. 19b is connected to the cleaning means 9b by the discharge path 16b, the outflow part 19c is connected to the cleaning means 9c by the discharge path 16c, and the outflow part 19d is connected to the cleaning means 9d by the discharge path 16d. In addition, the one washing | cleaning means 9 points out the aggregate | assembly of the injection nozzle in which the washing water which passed the one outflow part 19 is injected, and is not restricted to the case where there is only one rotation nozzle and one fixed nozzle, but rotation. Various configurations are conceivable, such as when there are a plurality of nozzles, a combination of rotating nozzles and fixed nozzles, or when the location of the injection port is remote. In any case, one cleaning means 9 is used. There is no difference.

  The water diversion detection means 25 is installed on the discharge path 16 and is constituted by a temperature detection means. The water splitting detection means 25 does not need to be located in the vicinity of the outflow portion 19 and can be installed on the cleaning means 9, but in order to take out the signal detected by the water splitting detection means 25, it is close to the control means 7. It is desirable to install near the casing 20.

  Note that FIG. 3 is a conceptual diagram of the water diverting means 17. In practice, the casing 20 is divided into two parts in the upper and lower directions and is 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.

  In the above configuration, first, the basic operation of the dishwasher will be described. A dish to be washed 4 is set in a dish basket 5 and stored in a washing tub 3, and after detergent is introduced, the opening of the dishwasher main body 1 is closed by the door 2, and a standard washing course is provided by the course input means 6. Select the bleaching course and start operation. A cleaning process for removing dirt from the object to be cleaned 3 or a bleaching process for bleaching the deposited pigment, a rinsing process for pouring the attached detergent and residual vegetables, and a drying process for drying the water adhering to the object 3 to be cleaned Execute.

  First, the water supply valve is operated to supply a predetermined amount of cleaning water to the cleaning tank 3, and subsequently the cleaning water is pressurized by the cleaning pump 8, and the cleaning water is jetted from the cleaning means 9. At this time, the heating element 12 such as a sheathed heater provided in the cleaning tank 3 is energized, and the cleaning process or the bleaching process is performed while heating the cleaning water. Further, the temperature sensor 13 detects the temperature of the cleaning tank 3 and stops energization of the heating element 12 when the temperature becomes equal to or higher than a predetermined temperature.

  The washing water passes through the residual filter 11 and is sucked into the washing pump 8, supplied to the washing means 9 provided in the washing tank 3 from the washing pump 8, sprayed into the washing tank 3, After cleaning, it circulates along the route of returning to the drain port 10 again. At this time, a large dirt such as a residue dropped from the object to be cleaned 3 flows into the residue filter 11 together with the cleaning water, and a residue having a size that cannot pass through the residue filter 11 is collected by the residue filter 11. The

  When the washing process or the bleaching process for a predetermined time is finished, the washing water containing dirt is discharged out of the apparatus by the drainage pump 14, and the washing water is newly supplied. The washing pump 8 is operated, and washing water is sprayed again from the washing means 9 such as a washing nozzle, thereby rinsing the article 4 to be washed, such as detergent and leftovers. After the operation for a predetermined time, the operation of discharging the washing water and supplying the washing water again is repeated, and this rinsing step is continuously performed twice or more. Finally, the washing water is discharged outside the apparatus, and the rinsing process is completed.

  Subsequently, by performing a drying process and operating the blower, outside air is blown into the cleaning tank 3 through the blower path and is discharged from the exhaust port 15. At this time, the heating element 12 is energized, and evaporation of water droplets adhering to the object to be cleaned 3 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.

  Next, the operation and action of the water dividing means 17 will be described. As shown in FIGS. 3 and 4, the casing 20 has a substantially cylindrical shape, the axial direction of which is arranged in a substantially vertical direction, and the inflow portion 18 into which the cleaning water pressurized by the cleaning pump 8 flows is a casing. The outflow portion 19 is installed on the upper surface of the casing 20 at the lower end portion of the casing 20. The valve body 21 has a substantially planar shape, and the opposing surfaces of the outflow portion 19 and the valve body 21 also have a planar shape.

  When the washing pump 8 is operated, the valve body 21 rises by an operation accompanied by substantially linear movement and rotation according to the inclination of the upper engaging portion 23 due to the pressure of the washing water flowing in from the inflow portion 18, and is shown in FIG. 3. As described above, the predetermined outflow portion 19 is fixed at a position where it opens, and cleaning water is jetted from the cleaning means 9 communicating with the outflow portion 19. When viewed from the lower side of the valve body 21, as shown in FIG. 5, the upper engagement portion 23 is formed so that the opening 22 provided at the position where the washing water passes through the valve body 21 coincides with the predetermined outflow portion 19. Is set.

  Subsequently, once the cleaning pump 8 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, but at this time, according to the inclination of the lower engagement portion 24 The robot descends while rotating and stops at a predetermined position as shown in FIG. When the cleaning pump 8 is operated again, it is engaged with the next inclination of the upper engaging portion 23, the valve body 21 rises while rotating, and communicates with the next outflow portion 19, whereby the next cleaning means 9. The washing water is sprayed from.

  Since the outflow portions 19a to 19d are connected to the cleaning means 9a to 9d, respectively, the cleaning means 9 to which the cleaning water is jetted by intermittently operating the cleaning pump 8 is 9a → 9b → 9c → 9d. Switch in order. This is one cycle of switching in which the valve body 21 makes one round, and the injection continues while repeating this injection pattern. That is, one cycle means that the switching of the cleaning means 9 by the water distribution means 17 is completed.

  By these actions, the cleaning water is not supplied to the four cleaning means 9 at the same time, but the cleaning water is sequentially fed, so that an arbitrary object to be cleaned 4 can be viewed from a plurality of directions without increasing the amount of water supply. Wash water can be jetted. Therefore, the contamination adhering to the tableware 4 etc. can be cleaned in a short time, and highly efficient cleaning can be realized. In addition, in comparison with the case where a plurality of cleaning means 9 are simultaneously injected, it is possible to inject only from one cleaning means 9, and the cleaning power can be further increased.

  When the standard washing course is selected by the course input means 6, the control means 7 operates the washing pump 8 so as to inject the washing water sequentially from the respective washing means 9, as shown in FIG. To clean the object 4 to be cleaned installed in the cleaning tank 3 evenly. When the bleaching course is selected, as shown in FIG. 8, the control means 7 controls the water distribution means 17 by operating the cleaning pump 8 so that the cleaning water is jetted from a part of the cleaning means. Washing is performed so that the contact time of the pigment-deposited surface of the article to be cleaned 4 installed in the washing tank 3 and the washing water increases.

  Tableware for which bleaching is required includes only cups, hot water, teapots, etc. Due to its shape, it is most likely to increase the time for spraying the washing water from the washing means 9a and the washing means 9b located at the bottom of the tableware basket 5. The contact time of the pigmented surface of the cleaning object 4 and the cleaning water increases.

  In order to concentrate the washing water from some of the washing means 9 during the bleaching washing, the valve body 21 of the water dividing means 17 is rotated by turning on / off the washing pump 8 and the washing means for supplying water is switched. Therefore, the control means 7 becomes possible by counting the number of times the cleaning pump 8 is turned ON / OFF. However, if the valve body 21 does not rotate normally for some reason, such as leftovers caught in the upper engagement portion 23 or the lower engagement portion 24, the diversion of water may not be performed normally.

  If the water dividing means 17 does not operate normally, the washing water is jetted from the washing means 9 different from the washing means 9 that is originally intended to be concentrated, and the bleaching performance is deteriorated. In order to confirm whether the water diversion means 17 is functioning normally, it is desirable to install the water diversion detection means 25 on the discharge path 16. The control means 7 counts the number of times the cleaning pump 8 is turned ON / OFF and takes into account the signal obtained from the water diversion detection means 25 installed on the discharge path 16 to confirm whether the water diversion means 17 is functioning normally. And can fix any problems that may have occurred.

  It is desirable that the water diversion detection means 25 constituted by the temperature detection means for detecting a change in the temperature of the discharge path 16 is installed in the discharge path 16 of the cleaning means 9 that concentrates the spray water and injects the cleaning water. After the temperature detecting means is installed in the discharge path 16a of the cleaning means 9a and the supply of the cleaning water to the cleaning means 9a is detected, when the cleaning means 9 circulates for one cycle by counting the number of ON / OFF times of the cleaning pump 8, If the valve element 21 of the water distribution means 17 does not rotate for one cycle for some reason, the temperature detection means does not detect the supply to the cleaning means 9a again.

  At that time, ON / OFF of the cleaning pump 8 is repeated until the supply of the cleaning water to the cleaning means 9a is detected. When the supply of the cleaning water to the cleaning means 9a is detected, it is assumed that the cycle is repeated, and the process proceeds to the next cycle. Can do. Since the cleaning cycle can be quickly corrected, the cleaning performance can be maintained even when there is a problem with the water distribution means 17, time loss can be reduced, and the energy used can be suppressed.

  In addition to the temperature detection means, it is also possible to use optical detection means, means for determining the presence / absence of water based on conductivity, means for detecting water flow such as a flow meter, and the like. The function due to the difference is not changed.

(Embodiment 2)
FIG. 9 shows an example in which a driving motor (electric motor) 26 is used to drive the valve body 21, and the other basic configuration is the same as that of the first embodiment. The valve body 21 shown in FIG. 5 or the like is rotated by the drive motor 26 in the direction of the arrow. If the electric motor 26 is continuously driven at a constant speed, the same cleaning effect as in the first embodiment can be obtained. In addition, since the driving speed can be easily changed with the electric motor 26, when the bleaching course is selected, the cleaning water is jetted from a part of the plurality of cleaning means 9 in a concentrated manner. be able to. In addition, when the electric motor 26 is used, there is an advantage that the valve body 21 can be reliably rotated even when cleaning water containing foreign matter such as residue remains.

(Embodiment 3)
FIG. 10 shows an example in which an electromagnetic valve is used for switching the discharge path 16 of the water diversion means 27, and the other basic configuration is the same as that of the first embodiment. Instead of switching the outflow part 19 by rotating the valve body 21 shown in FIG. 5 or the like, the discharge path 16 is opened and closed using the electromagnetic valve 27, and the flow path from the inflow part 18 to the arbitrary outflow part 19 is opened. be able to. Moreover, if it is the solenoid valve 27, the opening time and opening order of a flow path can also be changed easily. In addition, when the electromagnetic valve 27 is used, there is an advantage that the flow path can be reliably opened and closed even when cleaning water containing foreign matter such as residue flows in.

  As described above, the dishwasher according to the present invention has a wide range of cleaning regardless of household use because the object to be cleaned has less energy loss in a short time and can be strongly bleached. Applicable to equipment.

Sectional drawing of the principal part of the dishwasher in Embodiment 1 of this invention Cross section of the main part of the dishwasher Sectional view of the water washing means of the dishwasher when the washing pump is operating Exploded perspective view of water diversion means of the dishwasher Bottom view of valve body of water diversion means of the dishwasher Sectional view of water washing means of the dishwasher when the washing pump is stopped Figure of spray pattern from each cleaning means in the standard washing course of the dishwasher Figure of spray pattern from each cleaning means of bleaching course of the dishwasher Sectional drawing of the principal part of the water diversion means of the dishwasher in Embodiment 2 of this invention The perspective view of the water distribution means of the dishwasher in Embodiment 3 of this invention Cross-sectional view of the main parts of a conventional dishwasher

Explanation of symbols

3 Washing tank 4 Object to be cleaned 6 Course input means 8 Washing pump 9 Washing means 16 Discharge path 17 Dividing means

Claims (7)

A cleaning tank for storing an object to be cleaned; a cleaning pump for pressurizing cleaning water; a plurality of cleaning means having an injection port for injecting cleaning water pressurized by the cleaning pump into the cleaning tank; A diversion unit that switches a discharge path to a cleaning unit to which cleaning water is supplied from a pump; a course input unit that selects a standard cleaning course and a bleaching course; and when the bleaching course is selected, the plurality of cleanings Of the means, the washing means for injecting the washing water onto the pigment deposition surface of the object to be bleached is a dishwasher in which the washing water is jetted more concentratedly than other washing means . A plurality of washing tanks for storing objects to be washed in a dish basket, a washing pump for pressurizing washing water, and a plurality of injection ports for jetting washing water pressurized by the washing pump into the washing tank. A cleaning means, a water distribution means for switching a discharge path to the cleaning means to which cleaning water is supplied from the cleaning pump, and a course input means for selecting a standard cleaning course and a bleaching course , each of the water distribution means, When the bleaching course is selected, the pigmentation of the object to be washed is located at the bottom of the tableware basket and required to be bleached. the cleaning means for injecting cleaning water to the surface, dishwasher of claim 1 wherein as the time to inject a longer wash water as compared with other cleaning means. The dishwasher according to claim 1 or 2, further comprising a water diversion detection means for detecting the washing means to which washing water is supplied from the washing pump. The water separation detection means has a temperature detection means for detecting the temperature of the discharge path for supplying the cleaning water from the water distribution means to the cleaning means, and the temperature detection means is a cleaning means for increasing the injection time when the bleaching course is selected. 4. The dishwasher according to claim 3, wherein the temperature of the discharge path to the is detected. The dishwasher according to any one of claims 1 to 4, wherein the water diversion means is configured to switch the discharge path of the washing water by rotating the valve body by turning on / off the washing pump. The dishwasher according to any one of claims 1 to 4, wherein the water diversion means is configured to rotate the valve body by a driving motor to switch a discharge path of the washing water. The dishwasher according to any one of claims 1 to 4, wherein the water diversion means is configured to switch a discharge path for supplying washing water from the washing pump to the washing means by an electromagnetic valve.