JP3251563B2 - Ventilation port cover for double pipe connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vent cover for connecting an inner cylinder and an outer cylinder to an end of a double pipe having two concentric ventilation ducts.

[0002]

2. Description of the Related Art As is well known, a ventilation duct is provided in a building for communication between an indoor space such as a toilet and a bathroom and the outside of the building. However, due to a demand for reduction of piping space and rationalization of construction. There is used a ventilation duct integrally provided with two systems of ventilation ducts each having one end connected to a separate room space. As an example, there is a double pipe having inner and outer double pipes concentrically. In this double pipe, the inner cylinder and the outer cylinder constitute separate ventilation systems, and are piped such that, for example, the inner cylinder communicates with the bathroom and the outer cylinder communicates with the toilet.

By the way, focusing on the ventilation port cover connected to the outdoor end of such a double pipe, the conventional ventilation port cover is such that the inner cylinder is extended in the axial direction of the cylinder as it is, and is provided in front of the ventilation port cover. In most cases, a cover structure is used in which a ventilation port for communicating the inner cylinder with the outside air is formed, and a ventilation port for communicating the outer cylinder with the outside air is formed on a side surface of the ventilation port cover.

[0004]

However, such a vent cover has a problem that a short circuit (short circuit) easily occurs because the front vent and the side vent of the vent cover are adjacent to each other. . That is, the short circuit is a phenomenon in which exhaust gas from one vent is sucked into the other vent. This phenomenon occurs, for example, when one of the vents is in an exhaust state and the inside of the room is at a negative pressure, whereby the other vent is in an intake state. When this short circuit occurs, for example, when the front vent is connected to the bathroom and the side vent is connected to the vent of the toilet, the air is temporarily discharged from the vent cover to the outside of the building through the front vent. The supposed bathroom moisture is returned to the room through the side circuit vents by the short circuit, so that the exhaust in the bathroom is not only meaningless, but also has an undeniable effect on the indoor living environment.

[0005]

SUMMARY OF THE INVENTION The present invention is made in the background of such a conventional vent cover for connecting a double pipe, and an object of the present invention is to make a short circuit between vents less likely to occur. .

In order to achieve this object, the present invention relates to a ventilating port cover for connecting a double pipe having an inner cylinder and an outer cylinder concentrically, an interior formed by a back cover and a hood covering the front thereof. A partition part that divides the space into two, an outer cylinder connecting cylinder whose one end is connected to the outer cylinder of the double pipe by the other end in a ventilation connection to one of the divided spaces, and one end of which is the inner cylinder of the double pipe and the other end of which is the other. An inner cylinder connecting cylinder which is connected to the divided space in a ventilation manner, and a vent hole communicating with the outside air is formed in each divided space at a position facing the side surface of the hood.

[0007] In the above-described short circuit, when vents (front vent and side vent) are close to each other as in the case of a conventional vent cover, the occurrence rate increases accordingly. Since the vent hole for the inner cylinder and the vent hole for the outer cylinder are formed at opposing positions on the side surface of the hood and are most distant from each other in distance, the occurrence of a short circuit can be prevented.

[0008] The partition wall portion of the ventilation port cover has a wall surface inclined with respect to the ventilation port of the hood so that an end on the rear cover side is located outside a through hole formed in the rear cover . together are provided in a state, Yes other end of the outer tube connecting cylinder is connected to the through hole of the rear cover, the through hole of the other end of the inner cylinder connection tube is perforated in the partition wall portion through one of the divided space Can be configured as connected.

According to this vent cover, for example, the exhaust gas flowing out from the outer cylinder connecting tube on one of the divided spaces, by contacting the partition wall portion provided to the wall surface is inclined with respect to the hood of the vent, the vent You will be guided to your mouth. Moreover, the partition wall portion, since the through holes drilled end side of the back cover side to the back cover is provided by positioning outward, one split space end opening of the outer tube connection cylinder is all around nor impair the aeration amount with respect to the outer cylinder of the open double tube. In addition, the other end of the inner tube connecting tube is connected to the through hole formed in the partition wall through one of the divided spaces, so that the ventilation amount of the double tube to the inner tube is not impaired.

[0010] In the ventilating port cover, the inner cylinder connecting cylinder is formed in an arc shape curved at a predetermined curvature in the one of the divided spaces, and the temperature fuse is melted.
Wherein the center of curvature of the inner tube connecting cylinder as a pivot point in response to the cross-sectional
Also further comprising a rotated along the inner tube connecting tube on one divided space damper plate for closing an end opening of the outer tube connection cylinder
Can be configured as

According to the shape of the hood, the pair of vents formed on the side surface of the hood according to the present invention can be any one of left, right, up and down, diagonally upper right and diagonally lower left, diagonally upper left and diagonally lower right. It is also possible to form on the side that is a pair of
The shape of the hood may be any shape such as a vertically long or horizontally long box.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a ventilation port cover for connecting a double pipe according to an embodiment.

The ventilation port cover 1 is assembled by inserting an opening edge of a hood 3 covering the front of the rear cover 2 into an outer frame of the rear cover 2 and screwing both sides from outside to form a substantially box shape. It is configured. A partition 4 for dividing the inner space formed by the back cover 2 and the hood 3 into two parts is attached, and the partition 4 allows the right divided space 5 _R as “one of the divided spaces”.
And the left divided space 5 _L as "the other divided space" is formed airtightly with each other and. These right division spaces _5R
Left divided space 5 _L and is open to the outside air through vent 6 _R, 6 formed in the hood 3, respectively _L.

[0014] 7 in the inner cylinder connecting tube, right divided spaces 5 is configured in the _R in the cylindrical member of the arc-shaped curved at a predetermined curvature, ventilation and inner tube of the double pipe (not shown) and the left divided space 5 _L Connect as possible. One end of the inner cylinder connecting cylinder 7 is formed in a circular shape with the same diameter as the outer diameter of the inner cylinder connecting cylinder 7 and is formed in a circular shape.
And is fixedly connected by welding. The other end is inserted inside the inner tube of a double pipe (not shown). In this inserted state, an elastic malt plane 7a is attached to the outer periphery of the inner cylinder connecting cylinder 7, and this is pressed into contact with the inner peripheral surface of the inner cylinder of the double pipe, whereby the inner cylinder is pressed. An airtight and liquidtight connection between the connection tube 7 and the inner tube of the double pipe is maintained. Further, a pair of semicircular butterfly damper plates 7b are provided in the inner cylinder connecting cylinder 7, and the internal space of the inner cylinder connecting cylinder 7 is closed by blowing the temperature fuse 7c at a predetermined temperature. It has become.

[0015] 8 in the outer tube connecting tube consists of a tubular member having a size larger than the inner cylinder connecting cylinder 7, connecting the outer cylinder and the right divided space 5 _R of the double pipe not shown breathable so. The outer tube connecting tube 8 is inserted into a through hole 2a of the back cover 2 which is formed in a circular shape with the same outer diameter as the outer diameter thereof, and a flange 8a formed at the end thereof is fixed to the back cover 2 by welding. It is connected. The other end is inserted inside the outer tube of a double pipe (not shown). In this inserted state, the retaining metal fitting 8b provided on the outer surface of the outer tube connecting tube 8 comes into pressure contact with the inner peripheral surface of the outer tube of the double tube from the inside. The connecting cylinder 8 and the outer cylinder are provided with a retaining force.

Reference numeral 9 denotes a damper plate, which is formed entirely of an annular plate. The inner diameter is slightly larger than the outer diameter of the inner cylinder connecting tube 7, and the outer diameter is larger than the opening diameter so that the end opening 8 c of the outer cylinder connecting tube 8 can be completely closed. . The other end of the closing spring 10 having one end fixed to the rear cover 2 side of the partition 4 is fixed to the damper plate 9, and the partition opening 4 and the end opening 8 of the outer cylinder connecting tube 8 are fixed.
c. On the opposite side of the closing spring 10, a temperature fuse 11 for fixing the damper plate 9 to the partition wall portion 4 is fixed.

Next, the operation of the ventilation port cover 1 configured as described above will be described. In the normal use state shown in FIGS. 1 and 2, the damper plate 9 always closes the end opening 8 c of the outer tube connecting tube 8 by the closing spring 10 in the direction X.
, But is stopped because it is locked to the partition 4 by the thermal fuse 11.

[0018] In this state, the exhaust gas and flowing from the inner cylinder connection tube 7 to the left divided space 5 _L, intake air flowing from the vent 6 _L to the left divided space 5 _L on the contrary, among which are curved at a predetermined curvature Guided by the tube connecting tube 7, they are respectively smoothly guided to the ventilation port 6 _L and the inner tube connecting tube 7. On the other hand, an intake or flowing from the outside to the right division space 5 _R through vent 6 _R, the exhaust gas flowing from the end opening 8c of the outer tube connecting cylinder 8 to the right division space 5 _R Conversely, partition walls 4 and to Damper plate 9 locked
There against the end opening 8c of the vents 6 _R and the outer tubular connecting tube 8,
Because are tilted their wall, smooth end opening 8c of the outer tube connecting tube 8, respectively, it is guided to flow to the vent 6 _R. Therefore, the ventilation port cover 1 can exhibit good ventilation performance without impairing the pressure loss performance of both the inner tube and the outer tube of the double pipe.

When an abnormal temperature rise occurs in the outer tube of the double pipe, the temperature fuse 11 is blown at a predetermined temperature, the locking to the partition 4 is released, and the damper plate 9 is released from the closing spring 10. It rotates in the closing direction X while receiving the bias, and closes the end opening 8c of the outer tube connecting tube 8 and stops as shown in FIG. At this time, the damper plate 9 is connected to the inner cylinder connecting cylinder 7.
Is rotatable along the inner tube connecting tube 7 with the closing spring 10 serving as the center of curvature as a turning point, so that the operation is smooth and the end opening 8c of the outer tube connecting tube 8 is securely closed. be able to. Therefore, even if the ventilation port cover 1 includes the curved inner cylinder connecting cylinder 7, the ventilation port cover 1 having the required operation reliability can be provided by a damper structure that skillfully utilizes the curvature.

In addition to the vent cover 1 as described above, examples
For example, other ventilation openings with ventilation openings on the left and right sides of the hood
Bars include those as shown in FIG. this
The upper and lower side surfaces of the hood 23 are closed with the vent cover 21.
The partition wall 24 has a wall 26_R, 26_LTo
With an internal structure arranged so as not to incline
It is. The end opening of the inner cylinder connecting cylinder 27 is in the left half.
Only left division space 25 _LOpen to the right half
For the right division space 25_RClosed to Ma
In addition, only the right half of the opening at the end of the outer cylinder connecting cylinder 28 is divided into right.
Space 25_ROpen to the left half of the left
Division space 25_LClosed to

The ventilation port cover 31 shown in FIG.
Upper divided space 35 _U and the lower division space 35 the inner space formed by the rear cover 32 and the hood 33 unlike the above example
The partition wall 34 for bisecting the _D provided on the divided space 35 _U through the inner tube connection cylinder 37 connected to the inner cylinder of the double pipe, the lower divided space 35 _D through the outer tube connection cylinder 38 two It is designed to be connected to the outer cylinder of a heavy pipe. Then, the upper divided space 35 under the divided space 35 _D is are allowed to open to the outside air through the vents ₃₆ U, 36 _D formed on the upper and lower sides of the respective hood 33. The left and right side surfaces of the hood 33 are closed by the ventilation port cover 31. The other configuration of the ventilation port cover 31 and the operation and effect due to it are the same as those of the above-described ventilation port cover 1 and will be omitted to avoid redundant description.

Ventilation port covers 1, 21, 31 as described above
According to the above, the ventilation port 6 communicating with the inner cylinder connecting cylinders 7, 27, 37
_R , 26 _R , and 36 _U and ventilation holes 6 _L , 26 _L , and 36 _D communicating with the outer cylinder connecting cylinders 8, 28, and 38 are connected to the hoods 3 and 2.
Since they are formed on the left and right or upper and lower opposing sides of 3, 33, a short circuit does not occur between these vents. In addition to the above examples, for example, depending on the shape of the hood, ventilation holes may be formed at diagonally upper right and lower left, or ventilation holes may be formed at diagonally upper left and lower right. Of course it is good.

[0023]

According to the present invention, a comfortable indoor environment can be maintained without the occurrence of a short circuit between the ventilation ports in the ventilation port cover for a double pipe.

[Brief description of the drawings]

FIG. 1 is a diagram showing an internal structure of a vent cover according to an embodiment of the present invention.

FIG. 2 is a right side view of the ventilation port cover of FIG.

FIG. 3 is an explanatory view showing a closed state of a damper plate with respect to the ventilation port cover of FIG. 1;

4A is a diagram showing the internal structure of another ventilation opening cover having ventilation holes on the left and right side surfaces, and FIG.

[Reference Numerals] 1, 21, 31 vent cover 2 rear cover 2a rear cover through hole 3,23,33 hood 4,24,34 partition wall 4a partition wall of the through hole 5 _R, 25 _R right divided space ( one divided space) _{5 L,} 25 L left divided space (the other divided _{spaces) 6 R, 6 L, 26} R, 26 L, 36 U, 36 D within vent 7,27,37 tube connecting cylinder 7a Moltoprene 7b Butterfly damper plate 7c Thermal fuse 8, 28, 38 Outer cylinder connecting cylinder 8a Flange 8b Retaining stopper 8c End opening 9, 39 Damper plate 10 Closing spring 11 Thermal fuse 35 _U Upper divided space (one divided space) 35 _D lower division space (the other division space)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 7/08 F24F 7/04 F24F 13/02 F24F 13/14

Claims (3)

(57) [Claims] 1. A ventilating port cover for connecting a double pipe having an inner cylinder and an outer cylinder concentrically, wherein a partition wall for dividing an internal space formed by a back cover and a hood covering the front thereof into two parts, An outer tube connecting tube whose other end is connected to one of the divided spaces by ventilation to the outer tube of the double tube, and an inner tube connecting tube whose one end is connected to the inner tube of the double tube by air and the other end is connected to the other divided space. And a ventilation port that communicates with the outside air in each divided space is formed at a position facing the side of the hood. Wherein the partition wall portion, so that the end edges of the back cover side is positioned outside the through holes drilled on the back cover, is provided in a state of being inclined the wall against the hood vents with the other end of the outer tube connecting cylinder is tangent to the holes of the back cover
Yes and continue with, vent cover according to claim 1 in which the other end of the inner cylinder connection barrel is connected to a through hole drilled in the partition wall through one of the divided space. 3. The internal cylinder connecting cylinder is formed in an arc shape curved at a predetermined curvature in the one of the divided spaces ,
Damper for closing an end opening of the outer tube connecting cylinder rotates along the inner cylinder connection cylinder curvature center of the inner tube connecting cylinder in the one divided space as a pivot point in response to the blowing of the thermal fuse The vent cover according to claim 1 or 2, further comprising a plate.