JP2011030622A - 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 the 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. Accordingly, it is not necessary to connect the drain pathway 10 or the drain trap 18 to the return pathway 20 by a hose, and therefore, 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. 7, 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 The tableware 3 stored in the tableware basket 4 is washed by spraying washing water from the seven injection holes 8. 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 portion 18 forms a part of a drain passage 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 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 injection holes 8 provided in the cleaning nozzle 7 to perform the process of 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. In this process, the air blowing means 12 operates and air outside the dishwasher 1 is sent into the washing 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, as shown in FIG. Will be stored. By configuring in this way, when the drainage channel 19 is connected to a household drainage pipe or the like, the bad odor that flows backward from the drainage pipe to the drainage path 19 is caused by the washing water stored in the drain trap unit 18 in the washing tank 2. It can be prevented from entering inside.

  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 of the washing water from being discharged out of the dishwasher 1, and the washing water W can be stored in the drain trap unit 18. That is, since the cleaning water W cannot be stored in the drain trap part 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 a bad odor.

Japanese Patent No. 3485772

  However, the configuration of the conventional dishwasher 1 as shown in FIG. 7 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. 8, 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. 7 and FIG. 8, a drainage return portion 22 that connects the drainage 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 made of collapsible vinyl chloride resin, rubber, etc., so there is a risk that the loose hose connection may be disconnected during operation of the dishwasher 1. is there.

  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. 10, 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 tub that stores a tableware basket in which dishes are arranged, a float chamber that stores the same water level as the washing water in the washing tub, A float that detects the water level, a cleaning means that circulates the cleaning water in the cleaning tank, a heating means that heats the cleaning water in the cleaning tank, and a cleaning water that is disposed so as to be freely rotatable in the cleaning tank. A cleaning nozzle having an injection hole for spraying, a draining means for discharging the cleaning water in the cleaning tank to the outside of the cleaning tank via the drainage path, and a substantially U-shaped part in a part of the drainage path, Equipped with a drain trap part that stores the wash water after discharging the wash water, and a return path that connects a part of the drain path to the float chamber. The drain trap part and the return path are made of resin and are integrally molded or resin welded. Or equipped with resin bonding It is.

As a result, the drain trap is made of a solid material that is not fragile and does not deform. Therefore, the strength of the drain trap can be improved compared to a case where it is made of a deformable material such as vinyl chloride resin or rubber. As a result, the drain trap part can be prevented from cracking and leaking 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. Since it is not necessary to use a hose connection for the connection portion with the return path, the number of hose connection points can be reduced by one. 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 Sectional view when the float chamber, drain trap and return path of the dishwasher are integrated. View from the back when the float room, drain trap and return path of the dishwasher are integrated. Sectional view when the float chamber, drain trap and return path of the dishwasher are integrated with the washing tank 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 a washing tank which stores the tableware basket which arranges tableware, a float room which stores the same water level as washing water in a washing tank, a float which detects the water level in a float room, Cleaning means for circulating the cleaning water, heating means for heating the cleaning water in the cleaning tank, cleaning nozzles arranged so as to be freely rotatable in the cleaning tank and having injection holes for jetting the cleaning water, and cleaning A drainage means for draining the cleaning water in the tank to the outside of the cleaning tank through the drainage path, and a substantially U-shaped portion provided in a part of the drainage path, and storing the cleaning water after discharging the cleaning water in the cleaning tank It has a drain trap part and a return path that connects a part of the drain path to the float chamber. 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 not infallible Because it is made of a solid that does not deform, it can improve strength compared to the case where it is made of a deformable material such as vinyl chloride resin or rubber. It is possible to prevent the drainage trap part from cracking and leaking the washing water even if the pressure of the flushing water by the drainage means is applied to the part, and to connect the drainage trap part and the return path with a hose connection Since there is no, one hose connection location can be reduced. 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 particular, the third invention is the one in which the drain trap part, the return path and the float chamber of the first or second invention are formed of a resin and integrally molded, resin-welded, or resin-bonded, and the return path, the float chamber, Since the positional relationship is always constant and does not deviate at a predetermined position, the wash water that passes through the return path during drainage is always supplied to the float chamber.

  Therefore, when the drain trap part and the float chamber are configured separately, if the drain trap part and the return path are made of resin and are integrally molded, resin welded or resin bonded, In assembly, if the drain trap part or the float chamber is attached in a bad way, the return path and the float chamber may not be in a predetermined positional relationship, and the tip of the return path may be arranged outside the float chamber. It is possible to prevent the washing water flowing through the return path during drainage from flowing out of the float room and the dishwasher and flooding the area where the dishwasher is installed. The property can be further improved.

  In the fourth invention, in particular, the cleaning tank according to any one of the first to third aspects is molded with resin, and the drain trap portion and the return path and the float chamber are integrally molded with the cleaning 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. It is possible to reduce the risk of disconnection of the hose caused by a hose connection error or loose hose attachment. 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. 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. Wash water having the same water level as the other wash 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. The return path 20 is formed of the drain trap portion 18 and resin, and is molded, resin welded, or resin bonded integrally with the drain trap portion 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. 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 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. 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 cleaning 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. In this process, the air blowing means 12 operates and air outside the dishwasher 1 is sent into the washing 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.

  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 drainage path 19 to the float chamber 16 at the time of drainage is formed of a resin such as polypropylene, polyacetal, ABS, polycarbonate, polystyrene, nylon, etc., and is integrally molded or resin welded Or, since the drain trap portion 18 is formed of a solid material that is not collapseable and does not deform by bonding with resin, it is more than that made of a collapsible material such as vinyl chloride resin or rubber. The strength can be improved, and the drain trap portion 18 is cracked even when the pressure of the washing water by the drain means 10 is applied to the substantially U-shaped portion α of the drain trap portion 18. It is possible to prevent the washing water from leaking and, 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, so that one hose connecting portion is reduced. be able to. 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. It is possible to reduce that the hose is disconnected due to looseness of the hose connection or the hose connection.

  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 The strength can be further improved, and the reliability of the drainage path 19 and the drain trap part 18 can be further improved.

  Then, as shown in FIG. 3 and FIG. 4, the drain trap part 18, the return path 20, and the float chamber 16 are formed of resin and integrally molded, or welded or bonded to the resin, so that three hose connection points are formed. 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.

  Therefore, when the drain trap part 18 and the float chamber 16 are configured separately, when the drain trap part 18 and the return path 20 are formed of resin and integrally molded or resin welded or resin bonded, In the assembly of the dishwasher 1, when the drain trap part 18 or the float chamber 16 is attached in a poor manner, the return path 20 and the float chamber 16 are not in a predetermined positional relationship, and the tip of the return path 20 floats. The washing water flowing through the return path 20 during drainage flows out of the float chamber 16 and out of the dishwasher 1 to drain the surrounding area where the dishwasher 1 is installed. It is possible to prevent this from happening, and the reliability of the dishwasher 1 can be further improved.

When the drain trap part 18 and the float chamber 16 are configured separately, the return path 20
One of the means for ensuring that the cleaning water flowing through the return path 20 is supplied to the float chamber 16 when the positional relationship between the float path 16 and the float chamber 16 is not at a predetermined position is the return path 20 as in the prior art. May be formed by a flexible hose made of vinyl chloride resin or rubber, and the return path 20 may be deformed and connected in accordance with the position of the float chamber 16, but in this case, there are four hose connection points. Needless to say, the number of hose connections cannot be reduced.

  Then, as shown in FIG. 5 and FIG. 6, the washing tank 2 is molded with resin, and the drain trap part 18, the return path 20 and the float chamber 16 are integrally molded with the washing tank 2, or 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 23 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

Claims (4)

A washing tub for storing tableware baskets in which dishes are arranged, a float chamber for storing the same water level as the washing water in the washing tub, a float for detecting the water level in the float chamber, and a washing water in the washing tub A cleaning unit that circulates, a heating unit that heats the cleaning water in the cleaning tank, a cleaning nozzle that is arranged so as to be freely rotatable in the cleaning tank and has a spray hole for injecting the cleaning water, and the cleaning A draining means for draining the cleaning water in the tank to the outside of the cleaning tank through the drainage path, and a cleaning water after discharging the cleaning water in the cleaning tank having a substantially U-shaped part in a part of the drainage path And a return path for connecting a part of the drainage path to the float chamber, and the drainage trap part and the return path are formed of resin and integrally molded, resin welded, or resin bonded. Dishwasher. The dishwasher according to claim 1, wherein the substantially U-shaped portion of the drain trap portion is thicker than other portions. The dishwasher according to claim 1 or 2, wherein the drain trap part, the return path, and the float chamber are made of resin and integrally molded, resin welded or resin bonded. The dishwasher according to any one of claims 1 to 3, 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.

Images