JP2000225086A - Tableware washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tableware washing machine capable of securing a water seal of a trap, preventing erroneous assembling of the trap, preventing a double trap of drain piping and being easy in cleaning of the trap inside. SOLUTION: An expanded pipe 32 having a diameter larger than a diameter of a U-shaped pipe 31 is arranged on the downstream side of the U-shaped pipe 31 of a trap 30, and is formed as a structure that the expanded pipe 32 can rotate in relation to the U-shaped pipe 31 in the vertical direction as the axis. In joining plural parts communicated with an outlet of the U-shaped pipe 31, collars 35, 37 or ribs are arranged to engage hooks 34, 36 with one part and hooks 34, 36 with the other part, and an installing part 43 to a tableware washing machine body is individually arranged in the plural parts. A horizontal directional or vertical directional branch pipe 40 is arranged in the U-shaped pipe 31 as a drain.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher provided with a trap in a part of a drainage path, and more particularly to an improvement in water sealing performance of a trap, an improvement in assemblability of an airframe, an improvement in workability, and an ease of maintenance. And a trap having a trap suitable for improvement of

[0002]

2. Description of the Related Art FIG. 7 is a side sectional view of a conventional dishwasher, and the structure and operation of the conventional dishwasher will be described below. The basket 2 placed on the inner surface of the door 4 which is substantially horizontal when fully opened, on which dishes and cooking utensils are loaded, moves from the inner surface of the door 4 to the rail 3 formed inside the washing tank 1, and is carried into a predetermined position.・ It is stored. A dedicated detergent for washing dishes and cooking utensils is set in a predetermined position such as a recess provided on the inner surface of the washing tank 1 or the door 4, and the door 4 is closed while rotating about the lower part of the opening of the washing tank as a fulcrum. Is fixed to a predetermined position of the cleaning tank 1. At this time, the cleaning tank 1 and the door 4 constitute a cleaning chamber 16 which is substantially watertight with respect to the circulation and injection of the internal water or hot water. Next, when an operation program to be executed by the operation unit 5 is selected, the operation is started by the control unit 6 based on the selected operation program.

After a predetermined amount of water or hot water is supplied to the inside of the cleaning tank 1 by the water supply means 7 and the water level detecting means 8, the cleaning pump 9 is started, whereby the cleaning water stored in the cleaning tank 1 is removed. After passing through the garbage filter 12, it is ejected into the washing chamber 16 from the nozzle 11 mainly toward the tableware. The detergent is mixed into the washing water by the jet of the nozzle 11 or the like, and the washing process is executed for a predetermined time while being heated and adjusted to a predetermined water temperature by the water temperature detecting means and the heater 10. When the washing step is completed, the washing water in the washing tank 1 is discharged by the drainage pump 13, and a predetermined amount of water or hot water is again supplied into the washing tank 1 by the water supply means 7 and the water level detecting means 8, and the rinsing step is started. Is done. By a plurality of rinsing steps with different settings such as water temperature, time, etc., detergent components remaining on the dish surface and the inside of the washing chamber 16 and finely-divided dishware are discharged outside the machine, and the washing operation is completed and drying is performed. Operation is started. The drying operation is performed by operating the drying unit 14 for a predetermined time at a predetermined temperature in the cleaning chamber and blowing a high-temperature airflow into the cleaning chamber 16.

In order to perform the above-mentioned complicated operations, various functional components and electrical components such as a cleaning pump 9 and a drain pump 13 are mounted around the cleaning tank 1 to protect these functional components and electrical components. A bottom plate 20 is attached to the lower portion of the washing tank 1, an exterior plate 17 is attached to the upper and side surfaces, and a rear exterior plate 18 is attached to the back surface. 8 to 11 show the configuration of a conventional trap and the movement of water inside the trap as viewed from the back of the dishwasher. Washing,
In each of the rinsing steps, the washing water, tableware deposits, and the like accumulated in the washing tank 1 are constructed via the drain pump 13, the drain hose 26, the trap 30, and the outside drain hose 42 (not shown) in FIG. It is led to the drain pipe installed in the object and drained. For the purpose of preventing the backflow of the odor and the invasion of the pests from the drainage pipe, water 38 ensuring a predetermined sealing depth remains in the trap 30 after the drainage. A check valve 39 is installed near the outlet of the trap 30 to prevent backflow of wastewater from the drainage pipe. Trap 30
In the case of a high-rise building, a large amount of drainage from an upper floor causes a sudden negative pressure on the downstream side of the trap 30, and the internal water
Moves downstream as shown in FIG. Since the volume of the water inside the trap 30 is invariable and the diameter of the trap 30 is almost constant irrespective of the location, the length of the water 38 along the flow is L1 in FIGS. If the negative pressure on the downstream side of the trap 30 is generated gradually and the suction force is small, the water 38 once in the state of FIG. 9 starts flowing toward the lowest part of the U-shaped tube 31 due to its fluidity, At the same time as the shape of the water column in the trap 30 collapses, the air on the upstream side becomes bubbles and moves through the water column to the downstream side. However, since the negative pressure on the downstream side of the trap 30 as described above is generated rapidly and the suction force is strong, the water 38 in the trap 30 flows downstream of the check valve 39 earlier than the water column collapses as shown in FIG. It is sucked out. Thereafter, when the drainage from the upper floor reaches the ground or the drain, the pressure inside the trap 30 returns to the atmospheric pressure, and the water 38 slightly remaining inside the trap 30 as shown in FIG. However, since the inside of the U-shaped tube 31 communicates without separating the water 38, the effect of preventing the backflow of bad smell and the prevention of invasion of pests is lost until the next use of the dishwasher.

In addition, since the positional relationship between the drainage pipe and the dishwasher is various at various installation locations, it is necessary to change the direction of drainage from the dishwasher, and the trouble of removing the trap 30 and reattaching it in the opposite direction is required. Work is easily assumed. Although the trap 30 is composed of a plurality of parts, in order to prevent disassembly and erroneous assembly by an installer or the like, the parts of the trap 30 have a structure that is difficult to disassemble using an adhesive during manufacture. I was However, in the process of assembling the dishwasher, bonding the parts is not an efficient assembling method because the application of the adhesive requires skill and the curing time of the adhesive needs to be considered.

Further, a flexible hose is used for the external drainage hose 42 connected to the outlet side of the trap 30 in consideration of workability. As a result, the drainage path becomes a double trap, which may hinder drainage performance. If the drainage performance is insufficient, a large amount of dirty washing water that should be drained will remain in the machine, and it will be mixed with the rinse water supplied in the next process at a high ratio, so rinse dishes with dirty water. And the cleaning performance deteriorates. In addition, in the event that the water supply means 7 fails, excess supply water, which could be sufficiently drained by the drainage pump 13, overflows the washing tank 1 and causes serious damage such as flooding of kitchen cabinets and houses. Develop.

[0007] Also, in principle, a dishwasher specifies in an instruction manual or the like that the residual dishes of used dishes should be removed and washing of the dishes should be started, but some users have insufficient methods of removing the residual dishes. In some cases, the operation may be performed with the garbage filter 12 forgotten. In the trap 30 of FIG.
When the clogging of the garbage occurs in 1, there is no way to cope with it, and it is necessary to replace the entire trap 30.

[0008]

The above-mentioned problems of the conventional dishwasher have the following problems.
The first problem is that the conventional dishwasher has a trap 30.
Is constructed with approximately the same diameter, so in a building with multiple floors, a large amount of drainage from the upper floor will create a negative pressure on the downstream side of the trap, and the water 38 inside will be sucked out and the sealed water will be cut off. The effect of preventing the backflow of pests and the prevention of pest infestation is lost. As a second problem, in a conventional dishwasher, a trap 30 for coping with various installation conditions is required.
Removal, disassembly and installation work are complicated, and may cause disassembly and incorrect assembly by installers, etc.
It is necessary that the components of the trap 30 have a structure that is difficult to disassemble using an adhesive, and the assembling process is inefficient. As a third problem, in a conventional dishwasher, since a flexible outside drainage hose 42 is used, a double trap is likely to occur, which may hinder drainage performance. As a fourth problem, in the conventional dishwasher, the garbage can be clogged in the drainage path because some users may not be able to remove the garbage properly or may operate with the garbage filter 12 forgotten. And replacement of the trap 30.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to ensure the sealing of the trap 30, prevent the trap 30 from being erroneously assembled, and provide a double trap for the drainage pipe. It is an object of the present invention to provide a dishwasher which prevents the inside of the trap 30 from being cleaned easily.

[0010]

In order to achieve the above object, according to the present invention, an enlarged pipe 32 having a diameter larger than the diameter of the U-shaped pipe 31 is installed downstream of the U-shaped pipe 31 of the trap 30. The structure is such that the magnifying tube 32 is rotatable about the vertical direction with respect to 31. Next, regarding joining of a plurality of components communicating with the outlet of the U-shaped tube 31, hooks 34 and 36 are attached to one of the components.
To the other part, a flange 3 engaging with the hooks 34, 36.
5, 37 or ribs were provided, and a plurality of parts were individually provided with attachment portions 43 to the dishwasher main body. Also,
A horizontal or vertical branch pipe 40 is provided as a drain in the U-shaped pipe 31. Further, protrusions 44, 45, 46, 47 such as ribs and bosses adjacent to the hooks 34, 37 are provided near the trap mounting portion of the dishwasher. A rib 48 or a projection is provided on the lower surface.

[0011]

(Embodiment 1) FIG. 1 shows the configuration of a dishwasher according to the present invention. Since the structure and operation of the main body are the same as those of the conventional dishwasher shown in FIG. 7, the same numbers are given to the respective parts and the description of the operation is omitted. Fig. 2 shows the configuration of the trap of the dishwasher according to the present invention and the movement of water inside the trap.
As shown in FIG. A drain hose 2 is provided at the rear portion 24 of the bottom plate 20.
6 project from the inside of the machine and are connected to the trap 30. The trap 30 is connected to a U-shaped pipe 31 and an expanded pipe 32 downstream of the U-shaped pipe 31 having a larger diameter than the U-shaped pipe 31 and having a bent inner flow path and a check valve 39 at a downstream end.
A connection joint 33 is connected to the downstream side. Trap 3
Numeral 0 is attached by screwing the attachment portion 43 to a boss on the back surface of the bottom plate. When the water inside the machine is discharged at the end of each of the washing and rinsing steps, water 38 remains inside the trap 30 as shown in FIG. 2, so that it is possible to prevent malodor backflow and pest invasion from the drainage pipe of the building. . At this time, if a large amount of drainage flows from the upper floor of the building, the inside of the drainage pipe of the building has a negative pressure, and a force for sucking out the water 38 inside the trap 30 acts. Then, it moves to the downstream side and reaches the expansion tube 32. Since the inside diameter of the expansion tube 32 is larger than the inside diameter of the U-shaped tube 31, when the water 38 inside the trap 30 reaches the expansion tube 32, the length of the water column along the flow rapidly decreases from L1 to L2. Therefore, if the negative pressure in the drainage pipe of the building is further continued, the air upstream of the water 38 in the trap 30 will have a length L2.
Easily becomes bubbles in the water 38 and flows downstream, and the water 3
8 itself does not flow downstream. Thereafter, if the drainage from the upper floor is discharged from the drainage pipe of the building, the pressure in the drainage pipe returns to the atmospheric pressure.
8 returns to the original U-shaped tube 31 to keep the water sealed.

The trap 30 is composed of a plurality of main parts such as a U-shaped pipe 31, an enlarged pipe 32, and a connection joint 33.
The hooks 34 and 36 are provided at the enlarged pipe joint of the U-shaped pipe 31 and the connection joint of the enlarged pipe 32, and the hooks 34 and 36 are provided at the U-shaped pipe joint of the enlarged pipe 32 and the enlarged pipe joint of the connection joint 33. The flanges 35 and 37 with which the 36 engages are provided. During the manufacture of the dishwasher, these trap components (U-tube 3
1. The hooks 34, 36 of the enlarged pipe 32, the connection joint 33) are inserted into the flanges 35, 37 and engaged with each other to assemble the trap. Therefore, as long as the components constituting the trap 30 are not inserted to a predetermined position, the hooks 34 and 36 and the flanges 35 and 37 do not engage, and the quality of the assembly can be easily determined. In FIG. 2, hooks 34 and 36 are provided at the enlarged pipe joint of the U-shaped pipe 31 and the connection joint joint of the enlarged pipe 32, and the hooks 34 and 36 are provided at the U-shaped pipe joint of the enlarged pipe 32 and the enlarged pipe joint of the connection joint 33. Although the flanges 35 and 37 with which the hooks 34 and 36 are engaged are provided, the flanges 35 and 37 may be engaged in a predetermined positional relationship, and the hooks 34 and 36 may be provided on any of the engaged components.

Further, a mounting portion 43 for the dishwasher main body.
Are provided separately on the U-shaped tube 31 and the enlarged tube 32, and if the assembly state is erroneous, the positional relationship between the mounting portions is shifted, and it becomes impossible to mount the mounting portion on the dishwasher main body. In addition, assembly problems can be prevented in advance.

In this embodiment, the branch pipe 40 is provided horizontally from the bottom of the U-shaped pipe 31 and is normally closed with a drain cap 41 made of rubber. Therefore, even if the trap 30 is clogged with garbage due to insufficient removal of garbage from the dishes to be washed or forgetting to attach the garbage filter, the drain cap 41 can be easily removed to remove the garbage inside the trap 30. Can be cleaned. In addition, water remaining in the machine used in the assembling / inspection process can be easily drained from the trap 30 simply by removing the drain cap 41. The branch pipe 40 may be oriented in any direction without being limited to the horizontal direction as shown in the figure, but is preferably horizontal or vertical for convenience of manufacture.

(Embodiment 2) FIG. 5 shows a configuration of a dishwasher trap 30 and a trap mounting portion of the dishwasher main body according to the present invention. An installation space for the trap 30 is secured on the back of the dishwasher body, and the trap mounting portion 43 is provided.
Are arranged symmetrically with respect to the drain hose 26. Therefore, when it is necessary to route the outside drainage hose 42 in the opposite direction depending on the installation state, the screw that originally attached the trap 30 is removed from the corresponding boss 44, and the trap 30 is attached to the drainage hose 26.
By twisting 180 degrees from the position indicated by the solid line to the position indicated by the two-dot chain line on the right side of the drawing, the twelfth embodiment is mounted on the boss 45 which is initially mounted on the drain hose 26 and the boss 45 which is symmetrical with the boss 44. Response is possible.

An outside drainage hose 42 is provided on the back of the body.
Hose guide ribs 48 are arranged symmetrically with respect to the drainage hose 26 so as to be in contact with the lower surface of the hose 42 in the vicinity of the mounting portion of the hose 42. Therefore, the bendable outside drainage hose 42 does not hang down in a downward direction, preventing double traps and maintaining a predetermined drainage performance.

Further, protruding bosses 44, 45 or ribs 46, 47 are provided near the trap mounting portion on the rear surface of the fuselage so as to contact the hooks 34, 36 with which the components constituting the trap 30 are engaged. The hose 26 is arranged symmetrically with respect to the center. Therefore, by attaching the trap 30 to a predetermined position of the dishwasher main body, the trap 3
Bosses 44, 45 and ribs 46,
47 are adjacent to each other and suppress the movable range of the hooks 34 and 36. That is, when the correctly assembled trap 30 is attached to a predetermined position of the dishwasher, the trap 3
Since a plurality of components constituting the zero are not disengaged from each other and cannot be disassembled, there is no fear of water leakage due to disengagement of the components. Therefore, it is not necessary to bond the trap parts to each other in the dishwasher assembling process, and the assembling process is simplified and more efficient.

(Embodiment 3) FIG. 6 shows the configuration of a dishwasher trap according to the present invention. The U-shaped pipe 31 is attached to the back of the dishwasher substantially perpendicularly and rearward with two screws, and the enlarged pipe 32 is attached together with the connection joint 33 with one screw so that the downstream side faces substantially the side. The outboard drainage hose 42 is attached to the outlet of the connection joint 33,
The external drain hose 42 may be drawn in the opposite direction depending on the installation state. At that time, first, one screw fixing the connection joint 33 is removed from the corresponding boss 44 ′, and the enlarged pipe 32 and the connection joint 33 are attached to the U-shaped pipe 31.
Is rotated 180 degrees from the position shown by the solid line to the position shown by the two-dot chain line and twisted. That is, the expanding pipe 32 is connected to the U-shaped pipe 31.
With respect to the vertical direction. Then, the boss 4 that was initially attached around the drain hose 26 is used.
It is possible to cope with changing the drainage direction by a very simple operation of attaching to the boss 46 'which is symmetrical with the 4'.

[0019]

According to the present invention, the following effects can be obtained by the above configuration. In claim 1, the diameter of the enlarged pipe connected to the downstream side of the U-shaped pipe 31 of the trap 30 is made larger than the diameter of the U-shaped pipe 31, so that the trap generated by a large amount of drainage from the upper floor of the building. 30 Negative pressure on the downstream side, internal water 38
Since only the air at the entrance side of the trap 30 is sucked out by reducing the length of the water column formed by the water, the seal does not break, and the effect of preventing the backflow of the odor from the drain pipe and the prevention of the invasion of pests is always maintained. Can be maintained. According to the second aspect, since the expansion pipe is configured to be rotatable, the outside drainage hose 42 is provided.
The work required to change the exit direction has been simplified, and it has become easier to cope with various installation states. According to the third aspect, the trap 30 is formed of a plurality of parts, and one of the parts has the hooks 34 and 36 and the other part has the hooks 3 and 36.
The flanges 35, 37 or ribs with which the hooks 4, 36 are engaged are provided, and the attachment parts 43 to the dishwasher body are separately provided on the plurality of parts. If it was not assembled, it would not be possible to attach it to the dishwasher body, so that assembly problems could be prevented in advance. In the fourth aspect, since the branch pipe 40 is provided in the U-shaped pipe 31 of the trap 30, even if blockage of the garbage occurs inside the trap 30 due to incorrect use by the user, the garbage can be easily removed. Becomes possible,
No need to replace parts. According to the fifth aspect, the hooks 34 and 36 in which the components constituting the trap 30 are engaged with each other at the trap mounting portion of the dishwasher body for joining.
Bosses and ribs 44, 45, 46,
Since the 47 is provided, water leakage due to the detachment of the components of the trap 30 can be prevented, and it is not necessary to use an adhesive for joining the components, so that the assembling process becomes efficient. According to the sixth aspect, the projections 48 such as ribs are provided from the dishwasher main body so as to abut against the lower surface of the external drainage hose 42 connected to the outlet of the trap 30, so that the bendable external drainage hose 42 hangs downward. As a result, it was possible to prevent double traps and maintain a predetermined drainage performance.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a detailed view of a dishwasher trap according to an embodiment of the present invention.

FIG. 3 is an explanatory view showing movement of water inside the trap of FIG. 2;

FIG. 4 is an explanatory view showing movement of water inside the trap of FIG. 2;

FIG. 5 is a detailed view of a trap and a mounting portion showing one embodiment of the present invention.

FIG. 6 is a detailed view of a trap and a mounting portion showing an embodiment of the present invention.

FIG. 7 is a side sectional view of a conventional dishwasher.

FIG. 8 is a detailed view of a trap of a conventional dishwasher.

FIG. 9 is an explanatory diagram showing movement of water inside the trap of FIG. 8;

FIG. 10 is an explanatory diagram showing movement of water inside the trap of FIG. 8;

FIG. 11 is an explanatory view showing movement of water inside the trap of FIG. 8;

[Explanation of symbols]

1: Cleaning tank, 2: Basket, 3: Rail, 4: Door, 5: Operation unit, 6: Control means, 7: Water supply means, 8: Water level detection means, 9: Cleaning pump, 10: Heater, 11: Nozzle , 1
2: garbage filter, 13: drain pump, 14: drying means, 16: washing room, 17: armor, 18: rear armor, 2
0: bottom plate, 25: water supply hose, 26: drain hose, 3
0: trap, 31: U-shaped tube, 32: enlarged tube, 33: connection joint, 34: hook, 35: collar, 36: hook, 3
7: Tsuba, 38: Water, 39: Check valve, 40: Branch pipe, 4
1: drain cap, 42: outside drainage hose, 43: mounting part, 44, 45: boss, 46, 47: hook holding rib, 48: hose guide rib,

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomohiro Nishi 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Touchi Kiki Co., Ltd. (72) Inventor Yoshihiro Ogami 2 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka 1-1-1, Totoki Kiki Co., Ltd. (72) Kazuaki Tahara, Inventor 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term in Totoki Kiki Co., Ltd. 2D061 DA10 DD03 DD14 3B082 AA01 BD02 BD04

Claims (6)

[Claims] 1. A dishwasher provided with a trap in a drainage passage for preventing backflow of drainage and the like, wherein the trap is U-shaped.
A dishwasher comprising: a U-shaped pipe; and an enlarged pipe connected downstream of the U-shaped pipe and having a diameter larger than that of the U-shaped pipe. 2. The dishwasher according to claim 1, wherein the magnifying tube is rotatable with respect to a U-shaped tube. 3. The trap is formed of a plurality of parts, one part is provided with a hook, and the other part is provided with a flange or a rib which engages the hook only in a specific positional relationship. The dishwasher according to claim 1, wherein the dishwasher is separately provided with a mounting portion to the dishwasher main body. 4. The dishwasher according to claim 1, wherein a branch pipe is provided in the U-shaped pipe. 5. In a dishwasher provided with a trap in a drain passage for preventing backflow of drainage, the trap is constituted by a plurality of parts engaged by hooks and flanges or ribs. A dishwasher, wherein a projection is provided in the vicinity of the hook so as to be adjacent to the hook. 6. A dishwasher in which a trap is provided in a drain passage for preventing backflow of drain water, and an outside drain hose is connected to an outlet of the trap. A dishwasher, wherein a projection such as a rib is provided to abut on a lower surface of the outside drain hose.