JPH0525846A - Structure of drain part - Google Patents

Abstract

PURPOSE:To prevent the back flow of polluted water and the intrusion of bad odors and insanitory pest by a method in which a check valve to close waterway when pressures are applied from drain trap and drain pipe sides is set between a water purifying device and the drain pipe. CONSTITUTION:A solenoid valve 7, a drain trap 3, and a check valve 4 are set in order from a water purifying apparatus 1 side and connected to a drain pipe 2. The valve 7 is connected to the drain port 5 in such a way as to enable it to open when water is drained. The valve 4 is made up of a valve 4a and a float (on water) structure 4b. The valve 4a is pushed by the pressure of drain water from the apparatus 1 to open the waterway and also strongly pressed on the peripheral wall 10 provided on the inner surface of a drain hole 9 by water pressure from the apparatus 1 to prevent the back flow of polluted water when drain water is exhausted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a drainage section between a water purification device and a drainage pipe.

[0002]

2. Description of the Related Art Conventionally, a check valve that closes a water channel to prevent backflow of sewage when pressure is applied from the drain pipe side between a drainage pipe and a water purifier such as a water drinker or dishwasher. A structure with valves is proposed.

[0003]

However, in the prior art, although the check valve can prevent the backflow of dirty water from the drain pipe, it cannot prevent the malodor and sanitary pests from entering from the drain pipe. Met. The present invention has been made in view of the above circumstances, and an object thereof is to provide a structure of a drainage unit that prevents not only backflow of dirty water from a drainage pipe but also invasion of bad odors and sanitary pests. is there.

[0004]

The structure of the drainage part of the present invention has a structure in which a bad odor and sanitary pests enter from the drainage pipe 2 between the water purification device 1 such as a water drinker or a dishwasher and the drainage pipe 2. The drain trap 3 for preventing the above-mentioned problem and the check valve 4 for preventing the backflow of sewage by arranging the water channel when pressure is applied from the side of the drain pipe 2 are arranged. It is a thing.

[0005]

Since the drain trap 3 for preventing the invasion of the foul odor and sanitary pests from the drain pipe 2 is provided, the check valve 4 can prevent not only the backflow of the sewage 6 from the drain pipe 2, but also the foul odor and the sanitary pest. It is possible to prevent the invasion of.

[0006]

Embodiment In the embodiment shown in FIG. 1, a solenoid valve 7, a drain trap 4,
A check valve 5 is arranged and connected to the drain pipe 2. The solenoid valve 7 is connected to the drain port 5 and is controlled so as to be opened when draining. The drain trap 3 may have a shape other than the U shape, such as an S shape, a P shape, a drum, and a belt wrap. The check valve 4 closes the water channel when pressure from the drain pipe 2 side is applied to prevent backflow of the dirty water 6, and floats on the rubber valve 4a and water as shown in FIG. 2 (a). It is composed of the structural part 4b, and when the drainage 8 is pushed by the water pressure of the drainage 8 from the water purifier 1 to open the water channel and the drainage 8 disappears, as shown in FIG. The water pressure from the drain pipe 2 causes the valve 4a to move to the drain hose 9
The back wall of the dirty water 6 is prevented by strongly contacting the peripheral wall 10 provided on the inner peripheral surface of the. The valve 4a and the structure portion 4b
If the distance D between the valve 4a and the peripheral wall 10 is increased as shown in FIG. 3, the adhesion between the valve 4a and the peripheral wall 10 is improved at the time when the reverse flow of the dirty water 6 does not substantially occur. Further, the drain port 5 is located higher than the check valve 4 by t (mm), and there is always a space between the electromagnetic valve 7 and the sewage 6 that flows backward, and the water purification device 1 for sewage 6 is provided.
It surely prevents backflow to. Further, the check valve 4 is designed so that when the pressure of tmmHg or more is applied from the drain pipe 2 side, the water channel is closed to prevent the reverse flow of the dirty water 6.

In the embodiment shown in FIG. 5, the water purifier 1
An electromagnetic valve 7, a check valve 4, and a drain trap 3 are sequentially arranged from the beginning. Also in this embodiment, the solenoid valve 7 is positioned higher than the check valve 4 by t (mm).

[0008]

According to the present invention, a drain trap and a drain pipe side are provided between a water purifier such as a water drinker or a dishwasher and a drain pipe to prevent a bad odor and sanitary pests from entering from the drain pipe. A check valve is provided to close the water channel and prevent backflow of wastewater when pressure is applied from the drainage pipe. It is possible to prevent invasion of sanitary pests.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the check valve and the action thereof in the above.

FIG. 3 is a cross-sectional view showing another example of the check valve.

FIG. 4 is a schematic view showing another embodiment of the present invention.

[Explanation of symbols]

1 water purification device 2 drainage pipe 3 drain trap 4 Check valve 5 drainage pipe 6 dirty water

Claims (2)

[Claims] 1. When a pressure is applied from the drain trap and the drain pipe side between the water purifier such as a water drinker or a dishwasher and the drain pipe to prevent a bad odor from the drain pipe and invasion of sanitary pests. The structure of the drainage part, which is equipped with a check valve that closes the water channel to prevent backflow of sewage. 2. The structure of the drainage part according to claim 1, wherein the drainage port of the water purifier is arranged higher than the check valve.