JP2001164621A - Ventilating piping for house - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide ventilating piping for a house capable of surely obtaining a sufficient ventilating effect. SOLUTION: In this ventilating piping 11 for a house arranged in drain piping 1 for connecting mutual horizontally laying drain pipes 2, 3 respectively arranged on an upper story and a lower story of the house via a vertical drain pipe 4, a ventilating pipe 12 branching off from the horizontally laying drain pipe 2 of the upper story is merged into a position separate by at least 1.2 m on the downstream side from a corner part 10 between the drain pipe 3 and the vertical drain pipe 4 in the horizontally laying drain pipe 3 of the lower story.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation pipe for a house to be installed on a drain pipe of a water circulating facility in order to prevent the water circulating facility from being completely sealed.

[0002]

2. Description of the Related Art In a drain pipe for guiding drainage from a water-circulating facility such as a toilet or a wash basin installed on an upper floor of a house to a sewer pipe, drainage from each water-circulating facility is laterally drawn to an upper floor. It is conducted in a horizontal direction by a drain pipe, then in a vertical direction by a drain vertical pipe, and further, flows into a sewer pipe through a horizontal drain pipe arranged under the lower floor.

[0003] In such a piping structure, the drainage stagnates at the junction of the horizontal drainage pipe and the drainage vertical pipe on the upper floor where the flow of drainage switches from the horizontal direction to the vertical direction, that is, at the corner,
In particular, when the amount of drainage is large, the drainage becomes full at this portion, and the air passage in the pipe is shut off. As a result, a negative pressure may be generated in the horizontal drainage pipe. In such a case, the water in the water seal type trap provided in the water circulating equipment such as a toilet bowl or a wash basin is drawn into the horizontal draw drain pipe due to the negative pressure, causing the water seal to run out or the sound of air entrainment. Occurred.

In order to prevent such a problem, a drain pipe is provided with a so-called return ventilation pipe. That is,
The ventilation pipe branched from the horizontal drainage pipe on the upper floor is lowered vertically and reconnected to the horizontal running part of the horizontal drainage pipe arranged under the lower floor, so that the horizontal drainage on the upper floor is performed. The air in the horizontal drainage pipe on the lower floor is sucked into the pipe to prevent water from being cut off due to negative pressure.

[0005]

When the return ventilation pipe is provided as described above, the ventilation effect varies depending on the connection position to the horizontal drainage pipe on the lower floor of the ventilation pipe. At present, the connection position of the ventilation pipe that can obtain the ventilation effect is not clear, and the setting of the connection position is left to the installer at present.

Therefore, depending on the connection position to the horizontal drainage pipe on the lower floor of the ventilation pipe, even if the ventilation pipe is provided, the ventilation is not performed sufficiently, and the water may be cut off, resulting in poor reliability. Providing ventilation pipes that do not provide sufficient ventilation in this way may be a waste of cost, materials and labor, and as long as the connection point is left to the constructor, it is a matter of chance whether ventilation is sufficient. This is inconvenient.

[0007] In view of the above, an object of the present invention is to provide a ventilation pipe for a house in which a sufficient ventilation effect is reliably obtained.

[0008]

In order to solve the above-mentioned problems, according to the present invention, horizontal drainage pipes respectively arranged on an upper floor and a lower floor of a house are connected to each other via drainage vertical pipes. This is a residential ventilation pipe provided for drainage pipes, and the ventilation pipe branched from the horizontal drainage pipe on the upper floor is downstream from the corner between the horizontal drainage pipe on the lower floor and the vertical drainage pipe. It is characterized by being merged at a position at least 1.2 m away.

According to the second aspect of the present invention, there is provided a ventilation pipe for a house provided to a drain pipe which connects horizontal drain pipes respectively arranged on an upper floor and a lower floor of a house via a drain vertical pipe. A pipe, wherein a vent pipe branched from a horizontal drainage pipe on an upper floor is joined to a position about 1.2 m downstream from a corner between the horizontal drainage pipe on the lower floor and a vertical drainage pipe. I made it.

According to the third aspect of the present invention, the connecting position of the ventilation pipe to the horizontal drainage pipe on the upper floor is about 0. 0 from the corner between the horizontal drainage pipe and the drainage vertical pipe on the upper floor upstream. The position was 5 m away.

In the invention according to claim 4, the ventilation pipe is once set up from the horizontal drainage pipe on the upper floor and is led to the horizontal drainage pipe on the lower floor.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a ventilation pipe for a house according to an embodiment of the present invention, FIG. 2 is a view showing a flow of air in the ventilation pipe, and FIG. 3 is a connection position of the ventilation pipe to a horizontal drainage pipe. FIG. 9 is a diagram showing a result of negative pressure measurement by using the following equation.

[0013] (1) is a drainage pipe from the upper floor of the house to the lower floor of the lower floor. (2) is a horizontal drainage pipe connected to the toilet (5) and running horizontally below the upper floor, and (3) is a horizontal drainage pipe running horizontally below the lower floor. The drainage pipes (2) and (3) are connected to each other by a vertical drainage pipe (4) running vertically in the piping space provided between the upper floor and the lower floor and penetrating the floor of the lower floor. ing.
The diameter of each drain pipe (2) (3) (4) (7) is about 75 mm
Is set to

In the toilet (5), a water ring type trap (6) is provided, and a drain pipe falling from the trap (6) is provided.
(7) is connected to one end of a horizontal drainage pipe (2) on the upper floor via an L-shaped first elbow (8), and the other end of the horizontal drainage pipe (2) is connected to a second elbow (9). ) Is connected to the upper end of the drainage vertical pipe (4). The lower end of this vertical drain pipe (4) is a third elbow
It is connected to the horizontal drainage pipe (3) on the lower floor via (10).

(11) is a ventilation pipe provided for the drain pipe (1). The ventilation pipe (11) is a ventilation pipe (2) branched from the horizontal drain pipe (2) on the upper floor. 12) to the horizontal drainage pipe (3) located below the lower floor. This ventilation pipe (12) is composed of a horizontal drainage pipe (2) and a vertical drainage pipe (4) in the horizontal drainage pipe (2) on the upper floor.
Riser pipe (14) through a T-shaped first pipe joint (13) provided at a position about 0.5 m upstream from the center of the second elbow (9), ie, the center of the second elbow (9). It rises and branches in the vertical direction. The rising height of the rising pipe (14) is about 5c.
If it is set to about m, it is possible to prevent drainage from flowing into the ventilation pipe (12).

The riser pipe (14) has an L-shaped fourth elbow (1).
6) is connected to a first horizontal running pipe (17) which runs horizontally below the upper floor in a direction perpendicular to the horizontal drainage pipe (2),
The first lateral running pipe (17) is connected via an L-shaped fifth elbow (18),
It is connected to a second horizontal running pipe (19) which runs horizontally below the upper floor while keeping parallel to the horizontal drainage pipe (2).

A downstream end of the second horizontal running pipe (19) is vertically suspended through an L-shaped sixth elbow (20) in a vertical direction while keeping parallel to the drain vertical pipe (4). The lower end of the vertical running pipe (21) is connected to the upper end of the running pipe (21), and the lower end of the third horizontal running pipe (23) runs horizontally below the floor of the lower floor through an L-shaped seventh elbow (22). To one end. This third horizontal running pipe (23)
The other end of the pipe is obliquely piped so as to be located directly above the horizontal drain pipe (3), and is vertically suspended toward the horizontal drain pipe (3) via an eighth L-shaped elbow (25). It is connected to the upper end of the downcomer pipe (26).

The lower end of the falling pipe (26) is connected to a horizontal drainage pipe below the lower floor through a T-shaped second fitting (24).
(3) connected to the vent pipe (12)
Merge with (1). The vertical drain pipe (4) hanging from the second elbow (9) of the drain pipe (1) and the sixth elbow (2) of the ventilation pipe (12).
The vertically running pipe (21) hanging from 0) is piped in parallel in the same pipe space.

In the above description, the merging position of the vent pipe (12) and the horizontal drain pipe (3) running under the lower floor is at the corner between the vertical drain pipe (4) and the horizontal drain pipe (3). Ie the third elbow
(10) The distance should be at least 1.2 m or more downstream from the center, preferably about 1.2 m. The pipe diameter of each pipe (14) (17) (19) (21) (23) (26) in the ventilation pipe (11) is set to about 50 mm in consideration of workability, performance and cost. However, even when the thickness is about 40 mm, almost the same performance can be obtained.

FIG. 2 schematically shows the state of drainage by the drain pipe (1) and the ventilation pipe (12) and the flow of air. Toilet bowl (5)
The waste water discharged from the tub becomes full in the vicinity of the second elbow (9), and a portion of the horizontal drainage pipe (2) where the air is blocked by the waste water is generated. In such a case, if there is no vent pipe, a negative pressure is generated in the horizontal drainage pipe (2), and the negative pressure causes the water sealed in the trap (6) to be sucked, thereby causing the water seal to run out.

In this embodiment, the horizontal drainage pipe on the upper floor is used.
(2) When the inside is going to be negative pressure, horizontal drainage pipe on the lower floor
The air in (3) flows in the direction indicated by the arrow through the ventilation pipe (12), is sucked into the horizontal drainage pipe (2) on the upper floor, and has a negative pressure in the horizontal drainage pipe (2). Is suppressed. In this way, it is possible to prevent the water in the toilet (5) from running out.

FIG. 3 shows a vent pipe (1) for a drain pipe (1).
The measurement result of measuring the negative pressure in the horizontal drainage pipe (2) while changing the merging position of 2) is shown. The drain pipes are all 75 mm in diameter, and the vent pipes are 50 mm in diameter.

According to HASS (Air Conditioning Sanitary Engineering Standards), the depth of sealing of the drain trap is 50 mm or more and 100 m or more.
m or less, and at least 50 mm is secured. From this, even if the sealing depth is 50 mmH2O, which is the minimum value according to the standard, the maximum negative pressure in the pipe is 5 mm.
If it is 0 mmH2O or less, the water will not run out.

Taking this into consideration, referring to the measurement results, when the ventilation pipe (12) is not provided, 67 mm H 2 O,
A negative pressure of 81 mmH2O is generated. Immediately after the horizontal drainage pipe (3) on the lower floor is drawn from the third elbow (10), the ventilation pipe (12)
68 mmH2O, and when the ventilation pipe (12) is connected at a position 1.2 m downstream from the third elbow (10) in the horizontal drainage pipe (3) on the lower floor. Is 11 mmH2O.

From the above measurement results, assuming that the connection position of the ventilation pipe (12) to the horizontal drawing drain pipe (3) is immediately after the third elbow (10), a negative pressure of 67 mmH2O is generated, and the return ventilation pipe is connected. The effect provided is not seen. If the sealing depth is in the range of 50 mmH2O to 67 mmH2O, the sealing will run out.

When the connection position is 1.2 m downstream from the third elbow (10), the maximum negative pressure in the pipe is drastically reduced to 11 mmH 2 O, and a dramatic ventilation effect is obtained. Since the minimum reference value of the water sealing depth is 50 mmH2O, no water sealing can occur.

From this, it can be seen that even if the ventilation pipe (12) is connected to the horizontal drainage pipe (3) on the lower floor, it may not be used at all depending on the connection position. If the connection position is left to the contractor, the construction may be adopted to shorten the third horizontal running pipe (23) on the lower floor as much as possible, because if the piping is long, the cost is high and the construction is troublesome, In such a case, ventilation may not be performed even if the ventilation pipe (12) is provided.

If the connecting position of the ventilation pipe (12) is separated from the corner between the vertical drain pipe (4) and the horizontal drain pipe (3) on the lower floor by at least 1.2 m, the water is cut off. The ventilation effect that can only be prevented is reliably obtained. If the length is shorter than this, even if the ventilation pipe (12) is provided, the effect of ventilation is reduced, and there is a strong possibility that sufficient ventilation to prevent the water from being completely sealed cannot be achieved. If the distance to the corner is 1.2 m, sufficient ventilation can be achieved without excessively increasing the length of the horizontal running pipe on the lower floor, and the economy and workability are excellent.

The ventilation pipe having the above-mentioned structure is effective for all water-circulating facilities provided with a water-sealing trap.
It is needless to say that the present invention is not limited to the above embodiment, and that many modifications and changes can be made to the above embodiment within the scope of the present invention.

[0030]

As is apparent from the above description, the ventilation pipe branched from the horizontal drainage pipe on the upper floor is at least downstream from the corner between the horizontal drainage pipe on the lower floor and the vertical drainage pipe. Because it is designed to merge at a position 1.2 m away, that is, at a position where a good ventilation effect can be obtained, the generation of negative pressure in the horizontal drainage pipe on the upper floor is suppressed, and the water sealing device installed in the water circulating equipment It is possible to reliably prevent the occurrence of water breakage and air entrainment noise in the trap, and improve reliability. Unlike the conventional method, in which the connection position of the ventilation pipe to the horizontal drainage pipe on the lower floor is left to the installer, there is no possibility of providing a ventilation pipe that does not play a sufficient role.

According to the second aspect of the present invention, the connecting position of the ventilation pipe to the horizontal drainage pipe on the lower floor is 1.2 m downstream from the corner between the horizontal drainage pipe and the drainage vertical pipe on the lower floor. With such a position, the piping length of the ventilation pipe is not so long, and a ventilation pipe with good economy and workability can be obtained.

According to the third aspect of the present invention, the connecting position of the ventilation pipe to the horizontal drainage pipe on the upper floor is about 0.5 m upstream from the corner between the horizontal drainage pipe and the drainage vertical pipe. With such a position, air can be effectively fed into the vicinity of the corner where the negative pressure is most likely to occur, whereby the generation of a negative pressure in the pipe can be reliably prevented.

According to the fourth aspect of the present invention, since the ventilation pipe is once set up from the horizontal drainage pipe on the upper floor, the drainage in the drainage pipe does not flow into the ventilation pipe. It is possible to eliminate a problem that the drain pipe is filled with the drainage and does not function, thereby providing a highly reliable ventilation pipe.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a ventilation pipe for a house according to an embodiment of the present invention.

FIG. 2 is a diagram showing a flow of air in a ventilation pipe.

FIG. 3 is a diagram showing a result of measuring a negative pressure depending on a connection position of a ventilation pipe to a horizontal drainage pipe.

[Explanation of symbols]

(1) Drainage pipe (2) Horizontal drainage pipe on upper floor (3) Horizontal drainage pipe on lower floor (4) Vertical drainage pipe (9) Second elbow (Horizontal drainage pipe and vertical drainage pipe on upper floor (10) 3rd elbow (corner between vertical drainage pipe and horizontal drainage pipe on lower floor) (11) Ventilation pipe (12) Ventilation pipe (13) First fitting (upper layer) (24) The second fitting (the position where the vent pipe joins the horizontal drainage pipe on the lower floor)

Continued on the front page (72) Inventor Mitsuro Fujiya 1-1-88 Oyodonaka, Kita-ku, Osaka Sekisui House Co., Ltd. F-term (reference) 2D061 AA04 AC08

Claims (4)

[Claims] 1. A residential ventilation pipe provided for a drain pipe which connects horizontal drain pipes respectively arranged on an upper floor and a lower floor of a house via a drain vertical pipe, The vent pipe branched from the horizontal drainage pipe on the upper floor is joined at least 1.2 m downstream from the corner between the horizontal drainage pipe on the lower floor and the vertical drainage pipe. Characteristic residential ventilation piping. 2. A residential ventilation pipe provided for a drain pipe which connects horizontal drain pipes respectively arranged on an upper floor and a lower floor of a house via a drain vertical pipe, The vent pipe branched from the horizontal drainage pipe on the upper floor is joined at a position about 1.2m downstream from the corner between the horizontal drainage pipe on the lower floor and the vertical drainage pipe. And residential ventilation pipes. 3. The connecting position of the ventilation pipe to the horizontal drainage pipe on the upper floor is set at a position about 0.5 m upstream from a corner between the horizontal drainage pipe and the vertical drainage pipe on the upper floor. The residential ventilation pipe according to claim 1 or 2, wherein: 4. The ventilation pipe according to any one of claims 1 to 3, wherein the ventilation pipe is started up from the horizontal drainage pipe on the upper floor and is led to the horizontal drainage pipe on the lower floor.