JP3030166B2 - dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dishwasher.

[0002]

2. Description of the Related Art Conventionally, there is a dishwasher in which water stored in a washing tank is discharged out of the machine by a drain pump. For example, Japanese Patent Application Laid-Open No. Hei 2-274219 (A47L15 / 42) discloses a conventional dishwasher. It is shown.

In this dishwasher, no trap or the like is provided in the drainage hose, and at the time of drainage, the drainage pump discharges all the wastewater to the outside without leaving the drainage hose in the drainage hose.

[0004]

In a so-called built-in type dishwasher in which the main body is stored in a sink, a drain hose is directly connected to a drain pipe connected to a downstream side of a drain trap of the sink.

[0005] In such a case, in the dishwasher as described above, it is not possible to avoid invasion of off-flavors, pests and the like from the drain pipe. Therefore, in order to prevent this, it is necessary to provide a trap in the drainage hose and always store water therein.

However, even if a trap is provided in the drain hose, if the pressure of the drain pump is large at the time of drainage, water in the trap is also discharged, and sufficient water does not remain in the trap. For this reason, there arises a problem that the function of the trap cannot be sufficiently performed.

[0007] The present invention is directed to improving dishwashers, and addresses such problems.

[0008]

DISCLOSURE OF THE INVENTION The dishwasher of the present invention comprises:
A cleaning tank for cleaning the dishes, and a drain pump for discharging the accumulated was water to the cleaning tank to the outside, Rutotomoni connected to the drainage pump, outside drainage in sink
In a built-in type dishwasher provided with a drain hose connected to a pipe and a trap part provided in the middle of the hose at the time of drain, at least one of the drain hoses upstream of the trap part inlet is provided. The portion is arranged at a position higher than the trap portion and has a bellows shape.

[0009]

The water in the washing tank is discharged by the drain pump through the bellows in the drain hose and the trap. At this time, if the pressure of the drain pump is large, the water in the trap section is also discharged.

However, during drainage, water accumulates on the step on the inner wall of the bellows. The water that has accumulated in the step remains immediately after drainage, and flows down over time and accumulates in the trap. That is, water is supplied to the trap section. Thereby, sufficient water can always be stored in the trap section.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

1 and 2, reference numeral 1 denotes a dishwasher according to an embodiment, 2 denotes a machine frame, and 3 denotes a washing tank provided in the machine frame 2. Reference numeral 4 denotes a door provided at an opening on the front surface of the cleaning tank 3, which has a lower end supported and opens forward.
5 is an operation panel attached to the upper part of the door 4,
An operation unit for performing various cleaning operations, an operation course, and a display unit indicating the degree of progress during the operation are provided.

Reference numeral 6 denotes a hollow nozzle arm rotatably supported at the center of the bottom of the washing tank 3, and a jet port 7 is opened at a predetermined angle on the upper surface. 8 is the washing tank 3
A drainage tank formed in front of the bottom of the tank.
And a drain port 10 is opened. Reference numeral 11 denotes a filter attached to the upper surface of the drainage tank 8 for removing residual foods flowing down from tableware. Reference numeral 12 denotes a cleaning pump provided at the outer bottom of the cleaning tank 3, and its suction port 13
The connection port 14 is connected to the circulation port 9 of the drainage tank 8, and the discharge port 15 is connected to the nozzle arm 6.

A drain pump 16 is also provided at the outer bottom of the washing tank 3, and its suction port 17 is connected to the drain port 10 of the drain tank 8 via a connection hose 18. 1
Reference numeral 9 denotes a drain hose connected to the discharge port 20 of the drain pump. The drain hose 19 is pulled out from the outer bottom of the washing tank 3 to the rear of the main body, lifted up at the rear, and then lowered downward. It is plumbed. In this way, the water in the washing tank 3 is prevented from flowing out at times other than drainage, and water flowing backward from outside is prevented from entering the machine.

The drainage port 21 of the drainage hose 19 is drawn out of the machine from the rear bottom surface of the main body, where it is connected to an external drainage hose 22 by a hose band 23. The external drain hose 22 is for connecting the drain hose 19 to an external drain pipe 24 such as a drain hose of a sink.

In the drainage hose 19, 25
A U-shaped trap portion is provided in front of the drain port 21, that is, at a position where the trap portion descends from the upper portion of the main body. 26
Is a check valve provided at the outlet of the trap section 25, and is opened when water flows in a direction of discharging outside the machine, and closed when water flows in a direction of flowing from outside the machine. Accordingly, even if the downstream part of the external drain pipe 24 is clogged, for example, and the drain water flowing into the drain pipe 24 flows into the inside of the apparatus as indicated by the arrow A, the drain hose 19
From entering the aircraft. The drain hose 19 has a bellows shape except for the trap portion 25.

In the washing or rinsing step, the washing water or the rinsing water stored in the washing tank 3 is introduced into the nozzle arm 6 by the washing pump 12, and furthermore, the washing water or the rinsing water from the jet port 7 And is sucked into the cleaning pump 12 again through the drainage tank 8. In this way,
The dishes are washed by the washing water and the rinsing water stored in the washing tank 3 being applied to the dishes while circulating.

During the draining step, the washing water and the rinsing water are supplied to the drain hose 19 by the operation of the drain pump 16.
Then, the water is discharged to the external drain pipe 24 through the external drain hose 22.

When the drainage is completed and the drainage pump 16 is stopped, the water which has not passed beyond the trap portion 25 accumulates in the trap portion 25. As a result, it is possible to prevent bad odors and pests from entering the inside of the machine from the outside drain pipe 24.

Here, in the draining step, if the pressure of the drain pump 16 is large, water in the trap part 25 is also discharged,
At the end of drainage, the trap portion 25 may not accumulate enough water.

However, at the time of drainage, water accumulates on the step on the inner wall of the bellows portion in front of the trap portion 25. The water that has accumulated in the step remains immediately after drainage, and flows down with time and accumulates in the trap unit 25. That is, the trap unit 2
5 is refilled with water.

Therefore, the trap section 25 can always be stored in a sufficient amount of water, and the odor and insect repellent effects of the trap can be reliably exhibited.

[0023]

According to the structure of the dishwasher of the present invention, even if the pressure of the drain pump is too large and the water in the trap part is also discharged, the drain accumulates on the step on the inner wall of the bellows part during drainage. After the drainage ends, the water flows down over time and
Since the water accumulates in the trap portion and water is supplied to the trap portion, sufficient water can always be stored in the trap portion. Therefore, the built-in interface connecting the drain hose to the external drain pipe
In the dishwasher of Ip, the deodorant and insect repellent effects of the trap can be reliably exhibited.

[Brief description of the drawings]

FIG. 1 is a side longitudinal sectional view showing the structure of a dishwasher according to the present invention.

FIG. 2 is a rear view in which a rear plate is also removed.

[Explanation of symbols]

 3 Cleaning tank 16 Drain pump 19 Drain hose 25 Trap section

Claims (1)

(57) [Claims] And 1. A dishwashing cleaning tank for cleaning and a drain pump for discharging the water which is accumulated in the cleaning tank to the outside, Rutotomoni connected to the drainage pump, to sink
Building with a drain hose connected to definitive outside drain pipe, and a trap portion provided in the middle of the waste water during hose
A dishwasher of a toe-type dishwasher, wherein at least a part of the drainage hose on the upstream side of the entrance of the trap portion is arranged at a position higher than the trap portion and has a bellows shape.