JP2011030624A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the reliability in a drain pathway and in the periphery of the drain pathway. <P>SOLUTION: The dishwasher includes a drain trap 18 having an approximately U-shaped part in part of the drain pathway 19 for storing washing water after draining the washing water within a washing tub 2, and a return pathway 20 to connect part of the drain pathway 19 to a float chamber 16. As the drain trap 18 and the return pathway 20 are formed of resin and integrally molded or resin-fused or resin-bonded, the drain trap 18 and the return pathway 20 are formed as solids which are neither foldable nor deformable. As it is not necessary to connect the drain pathway 10 or the drain trap 18 to the return pathway 20 by a hose, one hose connection part can be eliminated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dishwasher for washing tableware and cooking items in a general household.

  Conventionally, this type of dishwasher 1 has a structure as shown in FIG. Hereinafter, the configuration will be described.

  As shown in FIG. 9, the washing tub 2 is provided with a tableware basket 4 for storing the tableware 3 therein. The cleaning tank 2 is provided with heating means 5 (for example, a sheathed heater) for heating the cleaning water in the cleaning tank 2, and the cleaning means 6 (for example, a cleaning pump) pressurizes the cleaning water so that the cleaning nozzle It is configured to clean 7 of the injection hole 8 dishes 3 for accommodating the dishes basket 4 by injecting wash water from. The water supply valve 9 supplies tap water to the cleaning tank 2. The washing water in the washing tank 2 is drained by the drainage means 10.

  The filter 11 is provided in the washing tank 2 and collects leftovers (a food adhering to the tableware 3 as dirt is called leftovers) in the washing process and the rinsing process. The blowing means 12 operates in a drying process, blows air outside the dishwasher 1 into the washing tub 2 and exhausts it from the exhaust port 13, thereby drying the tableware 3 in the washing tub 2.

  A door 14 is provided on the front surface of the cleaning tank 2 so as to be freely opened and closed.

  The temperature detection means 15 detects the temperature of the cleaning water, air and the heating means 5 through the cleaning tank 2.

  The float chamber 16 communicates with a part of the cleaning tank 2, and when the cleaning water is supplied into the cleaning tank 2, the cleaning water is also supplied to the float chamber 16 and has the same water level as the cleaning water in the cleaning tank 2. The washing water is stored.

  The float 17 in the float chamber 16 detects the water level in the float chamber 16.

  The drain trap part 18 forms a part of the drain path 19 through which the washing water is discharged from the washing tank 2 to the outside of the dishwasher 1 by the draining means 10, and is substantially U-shaped as shown in FIG. It is formed so as to have a shape portion α.

  Further, the drainage path 19 is provided with a return path 20 that connects a part of the drainage path 19 to the float chamber 16 between the cleaning tank 2 and the drain trap portion 18.

  The control device 21 controls the water supply valve 9 to supply the cleaning water into the cleaning tank 2 based on the detection of the cleaning water level of the float 17, and controls the heating means 5 based on the output of the temperature detection means 15. In addition, the cleaning means 6, the water supply valve 9, the drainage means 10, the air blowing means 12 and the like are controlled to sequentially control a series of steps of cleaning, rinsing and drying.

  The operation of the above configuration will be described. When the user opens the door 14 forward, places the tableware 3 in the tableware basket 4, stores it in the washing tub 2, puts the detergent into it, and starts operation, first the drainage means 10. Is operated, and the washing water (referred to as residual water) remaining in the washing tank 2 in the previous operation or the like is discharged out of the dishwasher 1 through the drainage path 19.

  Then, the water supply valve 9 operates to supply cleaning water to the cleaning tank 2. At this time, since the float chamber 16 communicates with a part of the cleaning tank 2, cleaning water having the same water level as that of the cleaning tank 2 is also supplied to the float chamber 16. Therefore, the float 17 in the float chamber 16 can detect the level of the cleaning water in the cleaning chamber 2 by detecting the level of the cleaning water in the float chamber 16. When the float 17 detects a predetermined water level in the float chamber 16, the water supply valve 9 stops the supply of cleaning water.

  When the predetermined cleaning water is supplied, the cleaning means 6 pressurizes the cleaning water, and the cleaning water is sprayed from the injection holes 8 provided in the cleaning nozzle 7 together with the detergent. Thus, the cleaning process is performed. In this cleaning process, the heating means 5 provided in the cleaning tank 2 is energized to heat the cleaning water to a predetermined temperature in the cleaning process.

  After a predetermined time of washing process, the washing water containing dirt washed off from the tableware 3 is discharged out of the tableware washing machine 1 by the drainage means 10 through the drainage path 19.

  Subsequently, the cleaning water is newly supplied and sprayed again from the spray hole 8 provided in the cleaning nozzle 7, thereby rinsing the tableware 3 soiled with detergent, leftovers or the like.

  When this rinsing process is completed, the washing water is discharged out of the dishwasher 1 again. This rinsing process is repeated several times in succession. In the cleaning and rinsing process, the leftovers are collected in the filter 11 provided in the cleaning tank 2. When the predetermined number of rinsing steps are completed, the drying step is started. This stroke, air outside the dishwasher 1 blowing means 12 is operated is sent to the cleaning tank 2. The air sent in is heated by the heating means 5, and then the tableware 3 is dried and discharged out of the dishwasher 1 through the exhaust port 13. After the drying process is completed, the operation is terminated.

  Since the drainage passage 19 is provided with a drainage trap portion 18 having a substantially U-shaped portion α, when the drainage stroke is completed, the washing water is stored in the drainage trap portion 18 as shown in FIG. Will do. By configuring in this way, when the tip of the drainage channel 19 that is out of the dishwasher 1 is connected to a household drainage pipe or the like, a bad odor that flows backward from the drainage pipe to the drainage channel 19 is generated in the drain trap unit 18. It is possible to prevent the cleaning water stored in the cleaning tank 2 from entering the cleaning tank 2.

  Further, by providing a return path 20 that connects a part of the drain path 19 and the float chamber 16 between the cleaning tank 2 and the drain trap section 18, the drain means 10 discharges during the drain process. In addition to supplying a part of the washing water to the float chamber 16 and washing the float chamber 16, air can be sent back to the drainage path 19 from the path 20 immediately before the end of the drainage stroke. It is possible to prevent all the cleaning water from being discharged out of the dishwasher 1, and the cleaning water can be stored in the drain trap unit 18. That is, since the cleaning water cannot be stored in the drain trap portion 18 due to the siphon phenomenon without the return path 20, bad odor from the drain pipe enters the cleaning tank 2 and the kitchen via the drain path 19. It will fill your home with odors.

Japanese Patent No. 3485772

However, the configuration of the conventional dishwasher 1 as shown in FIG. 9 has the following problems.

  The drainage path 19 and the return path 20 are formed of a retractable hose such as vinyl chloride resin or rubber. As shown in FIG. 10, the drain trap part 18 having a substantially U-shaped portion α is provided. If provided, the collapsible hose is easy to bend into a substantially U-shape, but when the washing water is discharged from the washing tub 2 by the drainage means 10, pressure is applied to the substantially U-shaped portion α which is the bent portion. Therefore, there is a risk of cracking.

  Further, when the return path 20 is provided, as shown in FIG. 9 and FIG. 10, a drain return part 22 that connects the drain path 19 and the return path 20 is also required. Four hose connection parts A to D are generated in the drainage path 19 to the outside. Since the pressure of the washing water by the drainage means 10 is also applied to the hose connection parts A to D, when assembling the dishwasher 1, if any one of the hose connection parts A to D is forgotten to be connected, of course. In addition, when the connection is loose, the hose is formed of a collapsible vinyl chloride resin or rubber, so that the loose hose connection may be disconnected during the operation of the dishwasher 1. There is a fear.

  Therefore, if the drainage path 19 is cracked or any one of the hose connection parts A to D is detached, the washing water leaks out of the dishwasher 1 when the washing water is discharged out of the dishwasher 1. Thus, there is a problem that the kitchen or the like in which the dishwasher 1 is installed is submerged and the kitchen is damaged.

  In order to solve such a problem, as shown in FIG. 12, the drain trap portion 18 having the substantially U-shaped portion α of the drain passage 19 is made of a resin such as polypropylene, polyacetal, ABS, polycarbonate, polystyrene, or nylon. If the drain trap portion 18 is formed of the above-described resin, the drain trap portion 18 is not collapseable and is formed of a solid that does not deform. Therefore, the washing water drains into the substantially U-shaped portion α. Even when pressure is applied, the strength can be improved as compared with the case where the hose is made of vinyl chloride resin or rubber, so that a crack is generated in the drain trap portion 18 of the drain passage 19 and the washing water is washed into the dishwasher 1. Leakage to the outside can be reduced.

  However, even with such a configuration, since there are four hose connection portions A to D, there is a problem that the probability that the hose will come off is not reduced.

  This invention solves the said conventional subject, and aims at improving the reliability of a drainage channel and a drainage channel periphery part.

  In order to solve the above-described conventional problems, the dishwasher of the present invention includes a washing tank for storing a dish basket in which dishes are arranged, a float chamber for storing washing water having the same water level as the washing water in the washing tank, A float for detecting the water level in the float chamber, a cleaning means for circulating the cleaning water in the cleaning tank, a heating means for heating the cleaning water in the cleaning tank, and a rotatable means in the cleaning tank. And a cleaning nozzle having an injection hole for injecting cleaning water, drainage means for discharging the cleaning water in the cleaning tank to the outside of the cleaning tank through the drainage path, and a substantially U-shaped portion in a part of the drainage path. Equipped with a drain trap part that stores the wash water after draining the wash water in the washing tank and a return path that connects a part of the drain path to the float chamber, and the drain trap part and the return path are made of resin and integrated Molded or resin welded or resin bonded It is those with a.

As a result, the drain trap is made of a solid resin that is not foldable and does not deform, so it is stronger than if it is made of a foldable material such as vinyl chloride resin or rubber. As a result, the drain trap part can be prevented from cracking and leaking even when the pressure of the washing water by the drainage means is applied to the substantially U-shaped part of the drain trap part. Since it is not necessary to use a hose connection for the connection part between the part and the return path, one hose connection part can be reduced. Therefore, it is possible to reduce forgetting to connect the hose connection part when assembling the dishwasher, or loosening the hose connection and disconnecting the hose.

  Since the dishwasher of this invention made it the structure of Claim 1, since it is not necessary to make the connection part of a drain trap part and a return path into a hose connection, it can reduce one hose connection location. Therefore, when assembling the dishwasher, it is possible to reduce forgetting to connect the hose connection part or loosening the hose connection or disconnecting the hose. The reliability of the route can be improved.

Sectional drawing of the dishwasher of 1st Example of this invention View of the dishwasher from the back The figure seen from the back when the return path of the dishwasher has two of the first return path and the second return path View from the back when the first return path and the second return path of the dishwasher are merged and then connected to the float chamber Sectional view when the float chamber, drain trap and return path of the dishwasher are integrated. View from the back of the case where the integrated float chamber and the drain trap portion and the return path of the dishwasher Sectional view taken in the cleaning tank integrally float chamber and the drain trap portion and the return path of the dishwasher View from the back when the float chamber, drain trap and return path of the dishwasher are integrated with the washing tank Cross-sectional view of a conventional dishwasher View from the back of the dishwasher The figure which shows the state by which the wash water was stored in the drain trap part of the tableware washing machine The figure which shows the example at the time of molding the drain trap part of the dishwasher with resin

1st invention is the washing tank which stores the tableware basket which arranges tableware, the float room which stores washing water used as the same water level as the washing water in a washing tank, The float which detects the water level in a float room, Washing means for circulating washing water in the washing tank, heating means for heating the washing water in the washing tank, and washing having an injection hole arranged so as to be freely rotatable in the washing tank and jetting the washing water Nozzle, draining means for discharging cleaning water in the cleaning tank to the outside of the cleaning tank through the drainage path, and cleaning after discharging the cleaning water in the cleaning tank with a substantially U-shaped part in a part of the drainage path Equipped with a drain trap part that stores water and a return path that connects a part of the drain path to the float chamber, and the drain trap part and the return path are made of resin and are integrally molded, resin welded or resin bonded The drain trap is Because it is made of a solid resin that is not invertible and does not deform, the drainage trap can be stronger than if it is made of a deformable material such as vinyl chloride resin or rubber. It is possible to prevent the drain trap part from cracking due to the cleaning water pressure applied to the substantially U-shaped part of the drain part and to prevent the cleaning water from leaking, and to connect the drain trap part and the return path. Since it is not necessary to make a hose connection, the number of hose connections can be reduced by one. Therefore, when assembling the dishwasher, it is possible to reduce forgetting to connect the hose connection part or loosening the hose connection or disconnecting the hose. The reliability of the route can be improved.

  In the second invention, in particular, the thickness of the substantially U-shaped portion of the drain trap portion of the first invention is made thicker than other portions, and the strength of the substantially U-shaped portion of the drain trap portion is further increased. Since it can be improved, it is possible to reduce the occurrence of cracks even if the pressure of the washing water by the drainage means is applied to the substantially U-shaped part of the drain trap part, and the reliability of the drain path and drain trap part Can be further improved.

  In the third invention, in particular, the return path of the first or second invention includes the first return path and the second return path, so that the drain trap portion and the return path are formed of resin and integrated. Since molding, resin welding, or resin bonding, even if two return paths, the first return path and the second return path, can be formed with one resin, without increasing the number of parts Can be configured. At the same time, the probability that the return path is clogged with dirt, etc. contained in the cleaning water discharged out of the cleaning tank by providing the return path with the first return path and the second return path. Can be made lower than in the case of a single return path.

  From the above, without increasing the number of parts, the return path can be provided with two of the first return path and the second return path, and the return path is clogged with dirt etc. Therefore, it is possible to more reliably prevent all the washing water in the drainage channel from being discharged outside the dishwasher due to the washing of the float chamber and siphon phenomenon, and more washing water is put into the drain trap part. It can be reliably stored.

  In the fourth invention, in particular, the first return path of the third invention is disposed above the second return path, and the cross-sectional area of the first return path is set higher than the cross-sectional area of the second return path. By making it wider, the first return path and the second return path are not at the same height in the drainage stroke, so the probability that the first return path and the second return path are clogged with the same dirt, etc. is reduced Since the cross-sectional area of the first return path is wider than the cross-sectional area of the second return path, the probability that the first return path is clogged with dirt etc. The probability that the route is clogged can be made lower. Therefore, it is possible to increase the probability that the washing water flows into the float chamber from the first return path that is higher than the second return path.

  In addition, since more washing water flows in the first return path than in the second return path, the amount of washing water flowing into the float chamber from a higher position can be increased, and the cleaning power of the float chamber can be increased. Can be improved.

  The fifth aspect of the invention is particularly the one in which the drain trap part, the return path and the float chamber according to any one of the first to fourth aspects of the invention are formed of resin and are integrally molded, resin-welded, or resin-bonded. Since the positional relationship between and the float chamber is always constant at a predetermined position and does not shift, the wash water that passes through the return path during drainage is always supplied to the float chamber.

  In other words, when the drain trap part and the float chamber are configured separately, if the drain trap part and the return path are formed of resin and are integrally molded or resin welded or resin bonded, the dishwasher is assembled. If the drain trap section or float chamber is not installed correctly, the return path and float chamber may not be in the specified positional relationship, and the tip of the return path may be placed outside the float chamber. The reliability of the dishwasher can prevent the wash water that sometimes flows through the return path from leaking out of the float room and the dishwasher and immersing the area where the dishwasher is installed. Can be further improved.

  In the sixth invention, in particular, the washing tank according to any one of the first to fifth aspects is molded with resin, and the drain trap portion and the return path and the float chamber are integrally molded with the washing tank, or resin welding or resin. Adhering, it is possible to eliminate the hose for the float chamber that connects the float chamber and the washing tank, and it is possible to eliminate the hose connection between the float chamber and the washing tank. mounting of hose connection errors or hoses it is possible to reduce the fear like hose off caused to loose. Therefore, it is possible to reduce the leakage of washing water outside the dishwasher, and the reliability of the dishwasher can be further improved.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description.

Example 1
In the dishwasher 1 shown in FIG. 1, heating means 5 (for example, a sheathed heater) for heating the washing water is provided in the washing tank 2 in which the dish basket 4 in which the tableware 3 is placed is stored. Moreover, the cleaning means 6 disposed on the lower surface of the cleaning tank 2 pressurizes the cleaning water. The cleaning water pressurized by the cleaning means 6 is sprayed from the spray hole 8 of the cleaning nozzle 7 provided in the cleaning tank 2. The cleaning water in the cleaning tank 2 is supplied from the water supply valve 9 to the cleaning tank 2 and drained by the drainage means 10.

  The filter 11 is provided in the washing tank 2 and collects leftovers (food that has adhered to the tableware 3 as dirt is called leftovers) in the washing step of washing the tableware 3 and the rinsing step of the tableware 3. .

  The blowing means 12 operates in the drying process, supplies the air outside the dishwasher 1 into the washing tank 2 and exhausts it from the exhaust port 13, thereby drying the tableware 3 in the washing tank 2.

  A door 14 is provided on the front surface of the washing tub 2 so as to be freely opened and closed. By opening the door 14, the tableware 3 can be freely taken in and out of the dishwasher 1.

  The temperature detection means 15 detects the temperature of the cleaning water, air and the heating means 5 in the cleaning tank 2.

  The float chamber 16 is configured to communicate with a part of the cleaning tank 2. When the cleaning water is supplied into the cleaning tank 2, the cleaning water is also supplied to the float chamber 16, and the cleaning in the cleaning tank 2 is performed. Wash water at the same level as the water is stored.

  The float 17 is disposed in the float chamber 16 and detects the water level in the float chamber 16 (when a predetermined amount of washing water is supplied into the float chamber 16, the float 17 floats and the float 17 The sensor S detects that it has surfaced).

  The drain trap part 18 forms part of the drain path 19 through which the washing water is discharged from the washing tub 2 to the outside of the dishwasher 1 by the drainage means 10, and is made of polypropylene, polyacetal, ABS, polycarbonate, polystyrene, It is made of a resin such as nylon. As shown in FIG. 2, there is a substantially U-shaped part α, and the cleaning water W is stored in a part of the substantially U-shaped part α.

On the other hand, as shown in FIGS. 1 and 2, a return path 20 for supplying cleaning water to the float chamber 16 is provided in a part of the drain trap portion 18. This return path 20 is formed of resin in the same manner as the drain trap part 18 and is molded, resin welded or resin bonded together with the drain trap part 18.

  The control device 21 controls the water supply valve 9 to supply cleaning water into the cleaning tank 2 based on the detection of the float 17 and controls the heating unit 5 based on the output of the temperature detection unit 15. The cleaning means 6, the water supply valve 9, the drainage means 10, the air blowing means 12 and the like are controlled to sequentially control a series of steps of cleaning, rinsing and drying.

  1 and 2, there are three hose connection portions A to C in the drainage path 19.

  The operation of the above configuration will be described. When the user opens the door 14, places the tableware 3 in the tableware basket 4, stores it in the washing tub 2 and puts the detergent into it, the door 14 is closed and the operation is started. The means 10 is operated, and the washing water (referred to as residual water) remaining in the washing tank 2 in the previous operation or the like is discharged out of the dishwasher 1.

  Next, the water supply valve 9 operates to supply a predetermined amount of cleaning water to the cleaning tank 2.

  At this time, since the float chamber 16 communicates with a part of the cleaning tank 2, cleaning water having the same water level as that of the cleaning tank 2 is also supplied to the float chamber 16. Therefore, the float 17 in the float chamber 16 can detect the level of the cleaning water in the cleaning chamber 2 by detecting the level of the cleaning water in the float chamber 16. And float 17 detects a predetermined water level in the float chamber 16 the water supply valve 9 to stop the supply of the washing water.

  When a predetermined amount of cleaning water is supplied, the cleaning water is pressurized by the cleaning means 6 and the cleaning water is sprayed from the injection holes 8 provided in the cleaning nozzle 7 together with the detergent. In this way, a cleaning process for cleaning the tableware 3 is performed. This cleaning step is to energize the heating means 5 provided in the washing tank 2, to heat the wash water to wash the predetermined temperature.

  When the washing process is performed for a predetermined time, the drainage means 10 discharges the washing water containing the dirt washed off from the tableware 3 to the outside of the tableware washing machine 1. Then, the water supply valve 9 newly supplies cleaning water, and the cleaning water is again sprayed from the injection holes 8 provided in the cleaning nozzle 7, and the process of rinsing the tableware 3 soiled with detergent, leftovers, etc. is executed.

  When this rinsing process is completed, the washing water is discharged out of the dishwasher 1 again. This rinsing process is repeated several times in succession. In the cleaning and rinsing process, the leftovers are collected in a filter 11 provided in the cleaning tank 2. When the predetermined number of rinsing steps are completed, the drying step is started. This stroke, air outside the dishwasher 1 blowing means 12 is operated is sent to the cleaning tank 2. The air sent in is heated by the heating means 5, and then the tableware 3 is dried and discharged out of the dishwasher 1 through the exhaust port 13. After the drying process is completed, the operation is terminated.

  In the rinsing process that is performed a plurality of times, at least one rinsing process may be a process of rinsing and heating the tableware 3 while heating the washing water by the heating means 5.

  Further, since the drainage passage 19 is provided with a drainage trap portion 18 having a substantially U-shaped portion α, the wash water is stored in the drainage trap portion 18 as shown in FIG. Will do. By configuring in this way, when the tip of the drainage channel 19 that goes out of the dishwasher 1 is connected to a household drainage pipe or the like, a bad odor that flows backward from the drainage pipe to the drainage channel 19 is generated in the drain trap unit 18. It is possible to prevent the cleaning water stored in the cleaning tank 2 from entering the cleaning tank 2.

  Further, by providing a return path 20 that connects a part of the drain path 19 and the float chamber 16 between the cleaning tank 2 and the drain trap section 18, the drain means 10 discharges during the drain process. In addition to supplying a part of the washing water to the float chamber 16 and washing the float chamber 16, air can be sent back to the drainage path 19 from the path 20 immediately before the end of the drainage stroke. It is possible to prevent all the cleaning water from being discharged out of the dishwasher 1, and the cleaning water can be stored in the drain trap unit 18. That is, since the cleaning water cannot be stored in the drain trap portion 18 due to the siphon phenomenon without the return path 20, bad odor from the drain pipe enters the cleaning tank 2 and the kitchen via the drain path 19. It will fill your home with odors.

  According to the present embodiment configured as described above, as shown in FIGS. 1 and 2, the drain trap part 18 for storing the wash water by forming a substantially U-shaped part α in a part of the drain path 19 and A return path 20 for supplying a part of the washing water in the drain path 19 to the float chamber 16 during drainage is formed of a resin such as polypropylene, polyacetal, ABS, polycarbonate, polystyrene, nylon, etc., and is molded or resin welded integrally. Or, since the drain trap 18 is made of a solid resin that is not foldable and does not deform by being bonded with resin, it is made of a foldable material such as vinyl chloride resin or rubber. Even if the pressure of the washing water by the drainage means 10 is applied to the substantially U-shaped portion α of the drain trap portion 18, the drain trap portion 18 is cracked. As shown in FIG. 2, the connecting portion between the drain trap portion 18 and the return path 20 is not connected to the hose as shown in FIG. Can be reduced. Therefore, in FIG. 1 and FIG. 2, the hose connection portions are hose connection portions A to C, and can be changed from four places in the conventional example to three places. Therefore, when the dishwasher 1 is assembled, the connection of the hose connection portions is performed. and you forget, and loose or hose connection it is possible to reduce that the hose comes off.

  Therefore, the reliability of the drainage path 19, the drainage trap part 18, and the return path 20 can be improved.

  In addition, as shown in FIG. 2, if the thickness of the resin of the part α to which the pressure of the washing water by the drainage means 10 is high is increased among the substantially U-shaped part α, the substantially U-shaped part α strength can be further improved, it is possible to further improve the reliability of the drainage path 19 and the drain trap portion 18.

  Then, since the drain trap portion 18 and the return path 20 are formed of resin and integrally molded, resin-welded, or resin-bonded, as shown in FIG. 3, the return path 20 is replaced with the first return path 23 and the second return path. Even if two of 24 are formed, they can be formed with one resin, so that the number of parts can be increased. At the same time, the return path 20 includes two first return paths 23 and second return paths 24, so that the return path 20 is caused by dirt or the like contained in the cleaning water discharged out of the cleaning tank 2. Can be made lower than when there is only one return path 20.

  As described above, the return path 20 can be provided with two of the first return path 23 and the second return path 24 without increasing the number of parts, and the return path 20 is clogged with dirt or the like and the washing water is Since the probability of not flowing can be reduced, it is possible to more reliably prevent all the washing water in the drainage passage 19 from being discharged out of the dishwasher 1 due to washing of the float chamber 16 and siphon phenomenon. Wash water can be more reliably stored in the trap unit 18.

In addition, if the cross-sectional area of the cross-sectional area A1 of the first return path 23 and the cross-sectional area A2 of the second return path 24 is substantially equal to the cross-sectional area when there is one return path 20, The amount of washing water supplied to the float chamber 16 can be made substantially the same in the case where there are one return path 20 and two cases, that is, too much washing water is returned to the float chamber 16 and the washing tank 2 in the drainage process. Therefore, the amount of washing water discharged from the washing tub 2 to the outside of the dishwasher 1 can be made substantially equal.

  Then, as shown in FIG. 3, the first return path 23 is disposed above the second return path 24, and the sectional area A <b> 2 of the second return path 24 is set to the sectional area A <b> 1 of the first return path 23. Since the first return path 23 and the second return path 24 are not at the same height in the drainage stroke, the first return path 23 and the second return path 24 are made of the same waste or the like. The probability of clogging can be reduced, and the cross-sectional area A1 of the first return path 23 is wider than the cross-sectional area A2 of the second return path 24. probability of clogging at, can be made lower than the probability of clogged second return path 24. Therefore, the probability that the washing water flows into the float chamber 16 from the first return path 23 located higher than the second return path 24 can be increased.

  In addition, since more washing water flows through the first return path 23 than through the second return path 24, the amount of washing water that flows into the float chamber 16 from a higher position can be increased. The detergency can be improved.

  As shown in FIG. 4, the first return path 23 and the second return path 24 may be joined and then connected to the float chamber 16.

  Then, as shown in FIG. 5 and FIG. 6, the drain trap part 18, the return path 20, and the float chamber 16 are formed of resin and integrally molded, resin welded, or resin-bonded, so that three hose connection points are provided. Since the positional relationship between the return path 20 and the float chamber 16 remains constant and does not shift at a predetermined position, the wash water that passes through the return path 20 during drainage is always supplied to the float chamber 16.

  That is, when the drain trap portion 18 and the float chamber 16 are separately configured, the drain trap portion 18 and the return path 20 are formed of resin and integrally molded, resin welded, or resin bonded. If the drain trap unit 18 or the float chamber 16 is not properly attached in the assembly of the cleaning machine 1, the return path 20 and the float chamber 16 are not in a predetermined positional relationship, and the tip of the return path 20 is at the float chamber. The washing water flowing through the return path 20 during drainage flows out of the float chamber 16 and outside the dishwasher 1 to drain the surrounding area where the dishwasher 1 is installed. it is possible to prevent that there is a risk, it is possible to further improve the reliability of the dishwasher 1.

  In addition, when the drain trap part 18 and the float chamber 16 are configured separately, the washing water flowing through the return path 20 is reliably floated if the positional relationship between the return path 20 and the float chamber 16 is not at a predetermined position. As one of the means for carrying out the supply to the chamber 16, the return path 20 is constituted by a collapsible hose such as vinyl chloride resin or rubber as in the prior art, and the return path 20 is located at the position of the float chamber 16. It is only necessary to deform and connect them together, but in this case, it goes without saying that the number of hose connection points becomes four and the number of hose connection points cannot be reduced.

Then, as shown in FIGS. 7 and 8, the washing tank 2 is molded with resin, and the drain trap portion 18, the return path 20 and the float chamber 16 are integrally molded with the washing tank 2, resin-welded, or resin-bonded. When the dishwasher 1 is assembled, the drain trap part 18 and the return path 20 and the float chamber 16 are already integrally attached to the cleaning tank 2, so that the drain trap part 18 and the return path 20 and the float chamber 16 are incorrectly attached. 1 and 3 can be prevented, and the float chamber hose 25 for connecting the float chamber 16 and the cleaning tank 2 shown in FIGS. 1 and 3 can be reduced. Since the hose connection between the chamber 16 and the washing tub 2 can be eliminated, the ho It is possible to reduce the risk and the like of the hose off occurring for attachment of connection errors and hose loose. Therefore, leakage of washing water to the outside of the dishwasher 1 can be reduced, and the reliability of the dishwasher 1 can be further improved.

  As described above, the dishwasher according to the present invention can reduce the water leakage that occurs when the washing water in the washing tank is drained, and can improve the reliability of the dishwasher. It can be applied not only to industrial dishwashers but also to commercial dishwashers.

DESCRIPTION OF SYMBOLS 1 Tableware washing machine 2 Washing tank 3 Tableware 4 Tableware basket 5 Heating means 6 Washing means 7 Washing nozzle 8 Injection hole 10 Drainage means 16 Float chamber 17 Float 18 Drain trap part 19 Drainage path 20 Return path 23 First return path 24 1st Second return path

Claims (6)

A washing tank for storing tableware baskets in which dishes are arranged, a float chamber for storing washing water having the same level as the washing water in the washing tank, a float for detecting the water level in the float chamber, and the washing tank A cleaning nozzle that circulates the cleaning water, a heating means that heats the cleaning water in the cleaning tank, and a cleaning nozzle that is arranged so as to be freely rotatable in the cleaning tank and that jets the cleaning water A drain means for discharging the cleaning water in the cleaning tank to the outside of the cleaning tank through a drain path, and a substantially U-shaped part is provided in a part of the drain path to discharge the cleaning water in the cleaning tank. A drain trap section for storing the wash water after the cleaning process, and a return path for connecting a part of the drain path to the float chamber. The drain trap section and the return path are formed of resin, and are integrally molded and resin welded. Or resin bonded dishwashing Machine. The dishwasher according to claim 1, wherein the substantially U-shaped portion of the drain trap portion is thicker than other portions. Return path, dishwashing machine according to claim 1 or 2, wherein comprising a first return path a second return path. The dishwasher according to claim 3, wherein the first return path is disposed above the second return path, and the cross-sectional area of the second return path is narrower than the cross-sectional area of the first return path. The dishwasher according to any one of claims 1 to 4, wherein the drain trap part, the return path, and the float chamber are formed of resin and integrally molded, resin-welded, or resin-bonded. The dishwasher according to any one of claims 1 to 5, wherein the washing tank is molded with resin, and the drain trap portion and the return path and the float chamber are integrally molded, resin-welded, or resin-bonded with the washing tank.

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