JPH04187132A - Electric dish washer - Google Patents

Abstract

PURPOSE:To prevent odor or sewage from drain pipes of houses from leaking into a dish washer by raising upward the sewage pipe at the delivery side of an effluent pump to form a reversed U-shape, and providing a drain trap and a check valve in the near position of the front cover at the lower part in front of a cleaning tank, on the way to the sewage pipe. CONSTITUTION:A sewage pipe at the delivery side of an effluent pump discharging the washed water inside a washing tank 14 to the outside is raised upward to form a reversed U-shape and branched from a part thereof to connect to a bypass hole 17 installed at the washing tank 14. In this way, when the washed water in the washing tank 14 is discharged, water is retained inevitably in a drain trap 18 to water-seal between the washing tank 14 and the drain pipe 21 of houses and hence, odor does not leak from the drain pipe 21 of houses into the washing tank 14. As a check valve 19 is fitted in the drain pipe, even when sewage flows reversely from the drain pipe 21 of houses, the sewage is prevented from inflowing into the washing tank 14 by the check valve 19.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a built-in dishwasher whose drainage path is directly connected to a drainage pipe in a house.

Conventional technology In recent years, the drain hose of the dishwasher has been used as the drain pipe 21 of the house, It has become mainstream to be directly connected to

The general structure of a conventional dishwasher will be explained with reference to FIG. A roughly box-shaped cleaning tank 2 with an open front is installed inside the main body 1 of the dishwasher, and this cleaning costs $1! ! The cleaning water in the cleaning tank 2 is sucked through the waste filter 6 by a cleaning pump 4 which is rotationally driven by a motor 3, and is force-fed to the upper and lower cleaning nozzles 6 in the cleaning tank 2. The washing water vigorously jetted from the washing nozzle 6 collides with the tableware 8 arranged in an orderly manner at the upper and lower heel 7 in the washing tank 2 to perform washing. and,
Washing water in the washing tank 2 is sucked in from the leftover filter 5 by a drainage pump 9 and discharged to the outside of the machine through a drainage hose 10. The drain hose 710 is directly connected to the drain pipe 11 of the house. Here, a part of the drainage path of the drainage hose 1o is raised upward in an inverted U-shape, and a part of the drainage path branches off and is connected to a bypass hole 12 provided in the cleaning tank 2. this is,
In the draining process, the drain is provided as an air suction port to prevent washing water from continuously flowing out due to a siphon phenomenon when the draining operation is stopped midway.

Problems to be Solved by the Invention In the structure of such a conventional dishwasher, the drain pipe 11 of the house and the drain hose 10 of the dishwasher are directly connected. There was a problem that water entered the cleaning tank 2 through the bypass hole 12 via the drainage hose 10. In addition, in the event that sewage backflows from the drain pipe 11 of the house, it should be passed through the drain hose 1o and bypass hole 1.
2. There was a problem in that sewage flowed into the cleaning tank 2.

The present invention solves the above problems, and provides a sanitary dishwasher that prevents foul odors and sewage from entering the dishwasher from the drain pipe of the house, and also prevents structural problems. The purpose is to make it easy to repair even if an abnormality occurs.

Means for Solving the Problems In order to achieve the above object, the present invention raises the middle of the drainage channel on the discharge side of the drainage pump upward in an inverted U-shape, and branches from a part of the drainage channel and connects it to the bypass hole of the cleaning tank. A drain trap and a backflow prevention valve are provided in the middle of the drain channel on the downstream side of the connected and branched portion, and near the front cover at the front lower part of the cleaning tank, and the front cover is made detachable.

Function: In the above-described configuration, the present invention is configured such that when the washing water in the washing tank is drained, the water always collects in the drain trap, and the space between the water distribution pipe and the washing tank is sealed with water, preventing the inflow of bad odors, and also preventing backflow. The valve prevents sewage from flowing back into the cleaning tank, and the drain trap and backflow prevention valve are both located near the removable front cover, so even if something goes wrong with this structure, they can be quickly removed. It can be repaired.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. Note that the basic structure of the dishwasher is the same as the conventional one, so its explanation will be omitted. As shown in the figure, a door 13 is arranged at the front of a substantially box-shaped cleaning tank 14, and a removable front cover 15 is arranged below the door 13. A drainage pump 16 is provided on the west side to extract the washing water in the washing tank 14 to the outside of the machine. The drainage channel on the discharge side of the water pump 16 is raised upward in the middle in an inverted U-shape, branched from a part thereof, and connected to a bypass hole 1 provided in the cleaning tank 14.

This is provided as an air suction port to prevent washing water from continuously flowing out into the pond due to siphon phenomenon when the drainage operation is stopped midway through the drainage process. Furthermore, a drain trap 18 and a check valve 19 are installed near the front cover 15 in the middle of the drain channel on the downstream side of the bypass hole 17, and then connected to the drain pipe 21 of the house with a drain hose 2o. ing.

According to the above configuration, when the cleaning water in the cleaning tank 14 is drained, water will definitely accumulate in the drain trap 18, and the space between the cleaning tank 14 and the drain pipe 21 of the house is sealed. Therefore, bad odor will not flow into the washer 14 from the drain pipe 21 of the house.

In addition, since the backflow prevention valve 19 is provided in the middle of the drainage channel, even if sewage flows back from the drain pipe 21 of the house, the backflow prevention valve 19 can prevent the sewage from flowing into the cleaning tank 14. Become. And the drain trap 18
Also, the backflow prevention valve 19 is located near the front cover 16, which is removably provided at the lower front of the main unit, so even if something breaks down or something gets clogged in the drain trap 18 or the backflow prevention valve 19, it will not be damaged. This means that the front cover 15 can be easily removed and repaired. In particular, dishwashers built into system kitchens have a structure in which the drain hose is directly connected to the drain pipe of the house, and repairs can be made from the front without having to pull out the fixed dishwasher. That is very convenient.

Effects of the Invention As is clear from the above embodiments, the present invention provides a drainage trap and a backflow prevention valve in the middle of the drainage channel.
Drainage water from the cleaning tank is always collected in the drain trap.
This creates a water seal between the water pipe and the cleaning tank, which prevents bad odors from the house's drain pipe from entering the cleaning tank, and the backflow prevention valve prevents sewage from entering the house's drain pipe from being washed. It can also prevent backflow into the tank. In addition, since the drain trough 71, the knob and the check valve are installed near the removable front cover, even if an abnormality occurs in this (1°4 structure), it can be repaired immediately. It can provide a good dishwasher.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a schematic structure of a dishwasher according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a schematic structure of a conventional dishwasher. 13...Door, 14...Cleaning tank, 15.
...Front cover, 16...Drain pump,
18... Drainage trap, 19... Backflow prevention valve.

Claims (1)

[Claims] A cleaning tank having a cleaning means inside, a door located at the front of the cleaning tank, a substantially box-shaped front cover located at the bottom of the door, and a drain for discharging the cleaning water in the cleaning tank to the outside of the machine. A pump is provided, and a part of the drainage channel on the discharge side of the drainage pump is raised upward in an inverted U shape, a part of which is branched off and connected to a bypass hole of the cleaning tank, and further downstream from the branched part. A dishwasher, in which a drain trap and a backflow prevention valve are provided in the middle of a drainage channel and near the front cover, and the front cover is detachable.