JP4508251B2 - Dishwasher - Google Patents

Description

  The present invention relates to a dishwasher which is installed in a kitchen or the like and performs storing, automatic cleaning, and drying of an object to be cleaned.

  Conventionally, this type of dishwasher has a configuration in which outside air is blown into a washing tub to dry the object to be washed after the washing is finished, and high temperature and humidity in the washing tub is discharged (for example, Patent Documents). 1).

FIG. 7 shows a conventional dishwasher described in Patent Document 1. In FIG. As shown in FIG. 7, a cleaning tank 101 for storing an object to be cleaned, a cleaning means 104 having a cleaning nozzle 102 for injecting cleaning water and a cleaning pump 103 for pressurizing the cleaning water, and a heating means 105 for heating the cleaning water. And an air outlet 106 that blows outside air into the cleaning tank 1, an exhaust port 107 that exhausts air inside the cleaning tank 1, and an exhaust assist unit 108 that mixes the outside air provided in the exhaust port 107.
JP 2000-166847 A

  However, in the conventional configuration, the exhaust auxiliary means is driven by the wind pressure of the exhaust from the cleaning tank flowing into the exhaust port, and the fresh outside air is mixed with the high-temperature and high-humidity exhaust as a side flow. However, there is a problem that the air volume is not enough to lower the exhaust temperature sufficiently, and the mixing ratio between the exhaust from the cleaning tank and the outside air cannot be changed appropriately. Was.

  The present invention solves the above-mentioned conventional problems, and mixes an appropriate amount of outside air into the exhaust from the washing tank flowing out from the washing tank, and further changes the mixing ratio by the wind pressure of the outside air from the blowing means. Therefore, it is possible to reduce the maintenance cost by facilitating the reduction of the exhaust temperature and the moisture content in the exhaust, and by removing and repairing the air volume distribution unit independently. The purpose is to provide.

In order to solve the conventional problems, the dishwasher of the present invention includes a first path that communicates the air blowing means and the washing tank, and a second path that communicates the exhaust port and the washing tank. If, from the third path and, wherein the first path a third path provided in the branch section that branches Rutotomoni the blowing means connected to said first branch to the second path from the path Air volume distribution means for changing the amount of outside air supplied into the cleaning tank and the amount of outside air supplied into the second path via the third path by the wind pressure of the supplied outside air , airflow distribution means, forming part of the first path, in which is provided detachably on said first path or said third path.

With this configuration , an appropriate amount of outside air is mixed with the exhaust from the cleaning tank that flows out of the cleaning tank, and the mixing ratio is changed by the wind pressure of the outside air from the blowing means, thereby reducing the temperature of the exhaust and the moisture in the exhaust. Reduction of quantity can be promoted. In addition, if a dishwasher user puts in a kitchen detergent, a large amount of foam is generated in the washing tub, and the foam flows back from the washing tub to the air volume distribution means along with foreign matter adhering to the dish. Therefore, even if dirt or bubbles adhere to the air volume distribution means and a problem occurs, the maintenance can be easily reduced by reducing the maintenance cost by removing the air volume distribution means alone and repairing.

The dishwasher of the present invention has a suitable amount of outside air for exhausting from the washing tank flowing out from the washing tank.
Further, by changing the mixing ratio according to the wind pressure of the outside air from the blowing means, it is possible to promote the reduction of the exhaust temperature and the reduction of the moisture content in the exhaust. In addition, if a dishwasher user puts in a kitchen detergent, a large amount of foam is generated in the washing tub, and the foam flows back from the washing tub to the air volume distribution means along with foreign matter adhering to the dish. Thus, even if dirt or bubbles adhere to the air volume distribution means and a malfunction occurs, the maintenance cost can be reduced and maintenance can be easily performed by removing and repairing the air volume distribution means alone.

The first invention is a cleaning tank for storing an object to be cleaned, a heating means for heating cleaning water in the cleaning tank, an exhaust port for discharging air in the cleaning tank, and an outside air in the cleaning tank. A supply air unit, a first path that connects the air supply unit and the cleaning tank, a second path that connects the exhaust port and the cleaning tank, and a branch from the first path, a third path connected to the second path, the said cleaning tank by the wind pressure of the outside air supplied from the first said of the path of the third Rutotomoni said blowing means provided in a branch portion of the route is branched Air volume distribution means for changing the amount of outside air to be supplied and the amount of outside air to be supplied into the second path via the third path, and the air volume distribution means is provided on one of the first paths. part was formed, detachably attached to said first path or said third path If the dishwasher user puts a detergent for the kitchen, a large amount of foam is generated in the washing tank, and the foam is washed with foreign objects attached to the dish. Even if there is a problem with dirt or bubbles adhering to the air volume distribution means from the air flow, the maintenance cost can be reduced by removing the air volume distribution means alone and repairing it. can do. Furthermore, by mixing an appropriate amount of outside air into the exhaust from the cleaning tank flowing out of the cleaning tank, and further changing the mixing ratio according to the wind pressure of the outside air from the blowing means, the temperature of the exhaust and the moisture content in the exhaust can be reduced. Reduction can be promoted. Moreover, since the operation of the dishwasher in a state where the air volume distribution means is out of order can be avoided, the problem of air blowing due to the failure of the air blowing means can be avoided.

  In the dishwasher according to the first aspect of the invention, in particular, in the dishwasher according to the first aspect of the invention, the air volume distribution means operates when the air blowing means is operated by substantially blocking the first path when the air blowing means is not operating. Even when a large amount of foam is generated because the kitchen detergent is put into the dishwasher during the cleaning process that is not performed, the first control valve substantially blocks the first path. It is possible to prevent the bubbles from moving from the cleaning tank to the blowing means, and to suppress the failure of the blowing means due to the bubbles.

A third invention is, in particular, in the first or dishwasher of the second aspect of the invention, the path member that mainly constitutes the third path is provided in the vertical direction in the outer wall front surface of the washing tub, The lower part is connected to the first path and the upper part is connected to the second path, and the cross-sectional area of the upper end is larger than the cross-sectional area of the lower end, so that parts for individually fastening the third path are inadvertently used. It can be configured in a limited space without increasing. Furthermore, since it is possible to realize highly efficient blowing with little loss without reducing the amount of blowing supplied from the blowing means, it is possible to effectively reduce the temperature and humidity of the exhaust.

In a fourth aspect of the invention, in particular, in the dishwasher according to the third aspect of the invention , the path member is engaged with and connected to the first path and the second path in the same direction, and at least two or more By configuring the parts by engaging the claws, a complicated form necessary for communication can be realized only by the third path, and the cost can be reduced without increasing the number of parts.

  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 cross-sectional view of a dishwasher / dryer according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of air volume distribution means according to Embodiment 1 of the present invention, and FIG. 3 is an embodiment of the present invention. 4 is another cross-sectional view of the air volume distribution means in FIG. 1, FIG. 4 is a perspective view of a connection portion between the first path and the third path in Embodiment 1 of the present invention, and FIG. It is sectional drawing of the connection part of the 2nd path | route and 3rd path | route in form 1, FIG. 6 is a perspective view of the 3rd path | route in Embodiment 1 of this invention, FIG. 7 is the conventional dishwasher FIG.

  As shown in FIGS. 1 to 3, at the bottom of a cleaning tank 1 that stores objects to be cleaned such as tableware, a cleaning nozzle 2 that ejects cleaning water onto the objects to be cleaned and a cleaning pump 3 that pressurizes the cleaning water. A cleaning unit 4 having heating and a heating unit 5 for heating the cleaning water to raise the temperature are arranged. Further, the air blowing means 6 is provided at the bottom of the outer wall of the cleaning tank 1, and the outside air is blown into the cleaning tank 1 in order to discharge the air in the cleaning tank 1 and dry the inside of the cleaning tank 1. Further, an exhaust port 7 for discharging the air in the washing tub 1 is provided in the upper part of the front surface of the dishwasher, and an air intake port 8 for the blowing means 6 to suck in outside air is provided. An inflow port 9 through which outside air flows is provided below, and an outflow port 10 through which air in the cleaning tank 1 is discharged is provided above.

  A first path 11 that communicates the blowing means 6 and the cleaning tank 1 is provided on the outer wall of the bottom of the cleaning tank 1, and external air is supplied from the blowing means 6 to the cleaning tank 1 through the first path 11. Further, the air in the cleaning tank 1 is exhausted to the exhaust port 7 through the second path 12 that connects the exhaust port 7 and the cleaning tank 1.

  The first path 11 is mainly composed of the first path part 11a, and similarly, the second path 12 and the third path 13 are mainly the second path part 12a and the third path part, respectively. It consists of a path component (path member) 13a. The first path component 11a and the second path component 12a are sealed and fixed to the front outer wall of the cleaning tank 1 by welding or using a seal packing so as not to leak water.

  As shown in FIG. 4 and FIG. 5, the third path component 13a is provided on the front surface of the outer wall of the cleaning tank 1, and connects the first path component 11a and the second path component 12a. . Further, the first path part 11a and the third path part 13a are connected in the first connection part 11b, and the second path part 12a and the third path part are connected in the second connection part 12b. Connected. Further, the third path component 13a is slidably fitted to the first and second connection portions 11b and 12b, and is configured to form a series of blowing paths. Further, the third path component 13a is composed of two resin parts that are nail-fitted as shown in FIG. 6, and the third path component 13a has a substantially square lower part, and the left and right direction as it goes upward from the lower part. Becomes longer and shorter in the depth direction. And finally, since the cross section is substantially rectangular and the third path component 13a is shortened in the depth direction, the space in front of the outer wall of the cleaning tank 1 can be used effectively. For example, control means for a dishwasher such as a printed circuit board can be provided in front of a portion of the third path component 13a whose length in the depth direction is shortened.

  The supplied blast mixes the air exhausted from the cleaning tank 1 and the outside air in the mixing section 14 where the second path 12 and the third path 13 intersect.

  The air volume distribution means 15 provided at the branching portion to the third path 13 connected to the first path 11 is an integration of the first control valve 16, the second control valve 17, and the rotary bearing 18. A coupling body 19 and a bearing portion 21 having a rotating shaft 20 are provided. The first control valve 16 whose opening degree is changed by the wind pressure of the outside air supplied from the blower 6 is located in the vicinity of the branch part in the middle of the first path 11, and similarly, the second opening degree is changed by the wind pressure. The control valve 17 is located in the vicinity of the branch portion of the path of the third path 13. Further, since the rotary bearing 18 is inserted into the rotary shaft 20 that protrudes substantially horizontally from the wall surface of the bearing portion 21, the connecting body 19 is pivotally supported.

  The air volume distribution unit 15 changes the opening degree of the first control valve 16 and the second control valve 17 in accordance with the wind pressure of the outside air supplied from the blower unit 6, and supplies the air into the cleaning tank 1. The amount of outside air and the amount of outside air supplied to the second path 12 via the third path 13 are changed. As a result, in the mixing unit 14, the mixing ratio of the outside air and the air exhausted from the cleaning tank 1 changes. Therefore, even if the temperature in the cleaning tank 1 changes, air having a predetermined temperature is discharged from the exhaust port 7. Can be discharged.

  Moreover, the connection body 19 is comprised so that the opening degree of the 1st control valve 16 may reduce, when the opening degree of the 2nd control valve 17 increases. Further, when the operation of the air blowing means 6 is stopped, the first control valve 16 is substantially horizontal so that the first path 11 is closed, and the second control valve 17 is substantially vertical and is open. . In a state where the first control valve 16 is blocking the first path 11, the second control valve 17 is weighted in the direction in which the first control valve 16 is closed, and the wind pressure of the blowing means 6 is lower than a predetermined value. In this case or when the operation of the blower 6 is stopped, the force acts in the direction in which the first control valve 16 is to be closed, that is, in the clockwise direction in FIGS.

  On the other hand, when the wind pressure of the blowing means 6 becomes higher than a predetermined value, the connecting body 19 rotates counterclockwise in FIGS. 2 and 3, and the angle of rotation of the connecting body 20 increases as the wind pressure increases. And if the wind pressure of the ventilation means 6 becomes higher than a predetermined value, the 2nd control valve 17 will be fully opened, and most of the ventilation volume will be supplied to the 1st path | route 11 side.

  Further, the air volume distribution means 15 forms a part of each of the first path 11 and the third path 13, and the first connection part to which the first path part 11a and the third path part 13a are connected. It is detachably provided near 11b. Therefore, if the user of the dishwasher accidentally puts a kitchen detergent, a large amount of foam is generated in the washing tank 1, and the foam is discharged from the washing tank 1 together with foreign substances adhering to the dish. 15, even if dirt or bubbles adhere to the air volume distribution means 15 and trouble occurs, the cost of maintenance can be suppressed by removing the air volume distribution means 15 alone and repairing it, Easy maintenance.

  Further, the wall surface of the bearing portion 21 of the air volume distribution means 15 forms a part of the wall surface of the path, and is fastened and fixed to the path in the vicinity of the branch portion with a screw. In FIG. 4, the fitting rib 13b of the third path component 13a is incorporated in the upper part of the first connecting portion 11b (hole) so as to slide fit from the front to the rear, and then the lid portion of the air volume distribution means 15 15a is fixed in a direction that prevents the third path component 13a from being detached.

  With this configuration, the air volume distribution means 15 fixes the third path part 13a to the front surface of the outer wall of the cleaning tank 1, so that the third path part 13a can be assembled and fixed without using another part. Even if the air flow distribution means 15 malfunctions, such as when the first control valve 16 or the second control valve 17 is stuck due to oil stains or the like, the air flow distribution means 15 can be easily removed and repaired. Maintenance can be done.

  FIG. 5 shows the connection means between the second path component 12a and the third path component 13a, but in the same direction as the sliding fitting direction of the first path component 11a and the third path component 13a described above. It can be connected. That is, the third path component 13a can be assembled in a one-way assembly operation with respect to the first and second path components 11a and 12a fixed to the front surface side of the cleaning tank 1.

Moreover, although the cross-sectional area of the 2nd connection part 12b of the 2nd path | route component 12a and the 3rd path | route component 13a is comprised so that it may become larger than the cross-sectional area of the 1st connection part 11b, the air volume mentioned later When the outside air is blown to the second path 12 during the air volume distribution operation by the distribution unit 15, the cross-sectional area of the first connection portion 11b that is the entrance of the outside air to the third path 13 is the outside air outlet. This is because the pressure of the blown outside air is reduced and the supply efficiency of the outside air is reduced when it is smaller than the cross-sectional area of the second connection portion 12b.

  In addition, the inventors also considered that the third path component 13a is formed by blow molding in an attempt to produce the third path component 13a at a lower cost, but the first path component 11a and the second path component 12a In consideration of the variation in the interval between the two and the wall thickness accuracy of the blow molded product, the third path component 13a is comprehensively designed to have a specification in which two injection molded products made of appropriate materials are assembled by nail fitting. It came to the conclusion that there is a merit.

  If one of the injection shaping parts of the third path part 13a is shaped integrally with the tank, the manufacturing cost can be reduced.

  About the dishwasher comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the slide body 27 is pulled out from the housing 26 to store the tableware, which is the object to be cleaned, in the cleaning tank 1, and the slide body 27 is returned to its original state to start cleaning. When the cleaning operation is started, the water supply valve 22 is opened and water is supplied from the water supply pipe 23 to the cleaning tank 1. When a predetermined amount of water is supplied, the water supply valve 22 is closed and the water supply is stopped. The operation of a certain cleaning pump 3 causes hot water to be ejected from the cleaning nozzle 2 and sprayed onto the dishes to be cleaned. The cleaning nozzle 2 is rotated by the reaction force of the cleaning water jetting, so that the cleaning water is spread over the object to be cleaned, thereby improving the cleaning performance. Here, the case where the heating means 5 is operated and washed with warm water is shown. However, if the object to be cleaned is weakly soiled, the heating means 5 may be operated without operating the water supply temperature, and the object to be cleaned may be contaminated. If it is strong, wash with detergent. When the cleaning operation is completed, the drain valve 24 is opened, and the cleaning water is drained from the drain pipe 25 to the outside of the housing 26. When draining is completed, the drain valve 24 is closed.

  In this cleaning process, the air blowing means 6 is not operated, the first control valve 16 substantially closes the first path 11, and the second control valve 17 substantially opens the second path. . Thus, since the 1st path | route 11 is substantially obstruct | occluded by the 1st control valve 16, even when a large amount of foam generate | occur | produces because a user should put the kitchen detergent into the dishwasher, It is possible to prevent bubbles from moving from the cleaning tank 1 to the blowing means 6 via the first path by the first control valve 16, and to suppress failure of the blowing means 6 due to bubbles. In particular, when bubbles enter the air blowing means 6, the worst case may be ignited. Therefore, the occurrence of this problem is effectively suppressed by shielding the first control valve 16 from the first path 11. can do. Further, since the air volume distribution means 15 is detachably provided, even when the first control valve 16 is fixed to the first path due to the generation of a large amount of bubbles, the air volume distribution means 15 can be replaced alone. Therefore, maintenance costs can be reduced and repairs can be easily performed. Moreover, since the case where a dishwasher is operated in the state where the air volume distribution means 15 has failed is reduced, it is possible to suppress the occurrence of problems due to the failure of the air blowing means 6.

  In the next rinsing operation, water is supplied in the same manner as in the washing operation without supplying detergent, and hot water is jetted from the washing nozzle 2 by the operation of the heating means 5 and the washing pump 3 and sprayed on the tableware that is the object to be washed. Let In order to dry the object to be cleaned after the rinsing operation, the object to be cleaned is preferably warmed in the final rinsing operation. If the final rinsing operation is performed with high-temperature water of about 60 ° C to 70 ° C, sterilization is performed. Can be processed. After the rinsing operation is completed, the rinsing water in the cleaning tank 1 is drained in the same manner as at the end of the cleaning operation.

In the subsequent drying operation, the air in the cleaning tank 1 that has become hot and humid due to the rinsing operation is discharged to dry the object to be cleaned. 11 and the third path 13 are distributed and blown to send outside air to the mixing unit 14 and the cleaning tank 1.
In particular, when the rinsing operation is performed with high-temperature water, the air flow control unit is operated intermittently by the air volume control unit at the start of the drying operation so that the high-temperature and high-humidity air in the cleaning tank 1 is not directly discharged from the exhaust port 7. The air volume is reduced and a low wind pressure is applied to the air volume distribution means 15 to blow mainly to the third path 13 side to cool the high-temperature and high-humidity exhaust produced in the initial stage of the drying process, and the exhaust port 7 Prevent high temperature and high humidity air from coming out.

  When the wind pressure of the outside air from the air blowing means 6 is low, the second control valve 17 applies a weight in the closing direction of the first control valve 16, that is, a moment acts in the clockwise direction in FIGS. Further, the weight of the first control valve 16 is further applied, and the first control valve 16 can be kept closed.

  Next, the air volume of the air blowing means 6 is slightly increased to increase the wind pressure applied to the air volume distributing means 15, and the first control valve 16 is slightly opened as shown in FIG. A small amount of wind is blown by distributing most of the wind to the third path 13 side, and in the mixing unit 14, the high-temperature and high-humidity wind pushed out of the washing tank 1 by the wind that has entered the first path 11 side. On the other hand, a large amount of wind entering the third path 13 is mixed and cooled, and the low-temperature wind is discharged from the exhaust port 7.

  As the drying operation proceeds, the humidity of the air exhausted from the cleaning tank 1 decreases due to the inflow of outside air into the cleaning tank 1, so that the temperature of the exhaust gas flowing out from the exhaust port 7 is cooled below a predetermined value. The amount of outside air required for this is reduced. Therefore, the amount of outside air to the mixing unit 14 can be reduced as the drying state progresses, and the amount of air to the cleaning tank 1 is increased by diverting the amount to the first path 11 side to increase the amount of air to be cleaned. Can improve the drying performance. Therefore, the wind pressure of the outside air from the air blowing means 6 is further increased as the humidity or temperature in the cleaning tank 1 is decreased by the wind that has entered the first path 11 with the operation of the air blowing means 6, and the first control valve 16. The second control valve 17 connected to and integrated with the first control valve 16 reduces the opening on the third path 13 side so that the outside air and the cleaning tank are exhausted. The rate of air flow with the air is changed, and the rate of air flow toward the first path 11 is increased to promote drying.

  Further, when the humidity or temperature in the cleaning tank 1 is lowered and the air in the cleaning tank 1 can be discharged from the exhaust port 7 without cooling, the blowing amount is increased by continuously operating the blowing means 6. Then, the opening degree of the first control valve 16 is fully opened, and the second control valve 17 is fully closed so that the air volume ratio between the outside air and the air exhausted from the cleaning tank is about 0: 1. Until the air is blown by the air blowing means 6.

  Thus, in the state where the first control valve 16 is fully opened, the second control valve 17 is loaded in the direction in which the first control valve 16 opens, that is, the moment acts in the clockwise direction. The fully opened state of the first control valve 16 can be easily maintained, and the opening of the first control valve 16 and the second control valve 17 changes in conjunction with each other. Along with the change, the stable air volume distribution to the first path 11 and the third path 13 is made, and the air volume ratio between the outside air and the air exhausted from the cleaning tank (the amount of air blown to the second path 12: cleaning) The amount of air blown into the tank 1) can be varied from about 1: 0 to about 0: 1, and the air blower 6 can be used effectively from cooling to drying with a single blower to realize low power consumption and cost reduction. can do.

  For this reason, low temperature and low humidity of the exhaust temperature can be realized by mixing the outside air into the air exhausted from the cleaning tank 1 in the mixing unit 14 and promoting cooling by changing the air volume distribution, and at the time of cooling the exhaust from the cleaning tank 1 By reducing the moisture content in the exhaust from the cleaning tank 1 due to the dew condensation that occurs, it is possible to improve the comfort by reducing the humidity increase in the installed indoor space, etc., and by changing the air volume distribution, Both prevention and securing of drying performance can be achieved.

  The dishwasher according to the present invention is useful as a household device that can reliably prevent a feeling of hot air due to exhaust with reduced temperature and humidity discharged during a drying operation and improve drying performance.

Sectional drawing of the dishwasher in Embodiment 1 of this invention Sectional view of air volume distribution means in the dishwasher Another sectional view of air volume distribution means in the dishwasher The perspective view of the connection part of the 1st path | route and the 3rd path | route in the same dishwasher Sectional drawing of the connection part of the 2nd path | route and the 3rd path | route in the same dishwasher A perspective view of the third path in the dishwasher Cross-sectional view of a conventional dishwasher

DESCRIPTION OF SYMBOLS 1 Washing tank 4 Cleaning means 5 Heating means 6 Air blowing means 7 Exhaust port 11 1st path | route 11a 1st path | route component 11b 1st connection part (connection part of 1st path | route component and 3rd path | route component)
12 2nd path | route 12a 2nd path | route components 12b 2nd connection part (connection part of 2nd path | route components and 3rd path | route components)
13 3rd path | route 13a 3rd path | route components 15 Air volume distribution means

Claims (4)

A cleaning tank for storing an object to be cleaned, a heating means for heating the cleaning water in the cleaning tank, an exhaust port for discharging the air in the cleaning tank, and a blowing means for supplying outside air into the cleaning tank, A first path that communicates the blowing means and the cleaning tank, a second path that communicates the exhaust port and the cleaning tank, and a branch from the first path that connects to the second path third and path, and the amount of outside air supplied to the cleaning tank by the outside air wind pressure supplied from Rutotomoni said blowing means provided in a branch portion of the third path from the first path is branched to An air volume distribution means for changing the amount of outside air supplied into the second path via the third path, and the air volume distribution means forms part of the first path, and dishwashing dry provided detachably on the first path or the third path Dryer. It said airflow distribution means when said blowing means is not operating, Dishwasher according to claim 1 wherein the substantially closing the first path. Route member that mainly constitutes the third path, the the outer wall front of the cleaning tank is provided in the vertical direction, the the lower first path, and the top is connected to the second path The dishwasher according to claim 1 or 2 , wherein the cross-sectional area at the upper end is larger than the cross-sectional area at the lower end . The path member, said first path and said second path and to engage in the same direction to connect, and a characterized by being constituted fitted nail at least two or more parts The dishwasher according to claim 3 .