JP7183069B2 - vent cover - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ventilation port cover attached to the indoor side of a ventilation port communicating from the outside to the room.

In recent years, houses are becoming more and more airtight. In highly airtight houses, exhaust fans are installed on the walls of the rooms to prevent sick building syndrome caused by volatile organic compounds (VOCs) used in wall materials and to control the concentration of carbon dioxide in the rooms. An air inlet is formed. A ventilation port cover is attached to the indoor side of the air supply port.

The ventilation port cover is provided with a plate portion that faces the opening of the air supply port and is movable in the central axis direction of the air supply port so that the air supply port can be opened and closed. The plate portion is normally used in an open state, but can be closed in order to cut off the supply airflow flowing into the room through the air supply port as necessary. For example, if the cold airflow that flows through the air supply port hits the body in winter and makes the occupants feel uncomfortable, or if there is a risk of strong wind blowing into the room from the outside during a typhoon, the air supply port will be closed by the plate. be done.

The plate portion facing the opening of the air supply port is brought into contact with the supply air flow. When cold supply air flows into the plate in winter, dew condensation occurs on the surface of the plate facing the room due to the difference from the room temperature, and the condensed water drips and stains the room. Patent Literature 1 discloses a configuration in which a packing, which is a heat insulating material, is attached to the entire surface of the plate portion facing the air supply port side to suppress dew condensation.

JP 2018-109469 A

However, when attaching the heat insulating material, troublesome work such as alignment is required, which leads to a decrease in workability. In addition, the adhesive strength of the heat insulating material may decrease over time, causing the heat insulating material to peel off.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ventilation port cover that can prevent dew condensation on a plate portion without using a heat insulating material.

In order to solve the above-described problems and achieve the object, the ventilation port cover includes: a cylindrical portion; a plate portion that faces the opening at one end of the tubular portion and is movable in the central axis direction of the tubular portion. The plate portion has a first plate portion facing the opening and a second plate portion provided on the opposite side of the opening with the first plate portion therebetween. The outer edges of the plate portions are in contact with each other, and an air layer is provided between the first plate portion and the second plate portion.

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the ability to obtain the ventilation-port cover which can prevent dew condensation of a board|plate part without using a heat insulating material.

FIG. 4 is a vertical cross-sectional view showing the installed state of the ventilation port cover according to the first embodiment of the present invention, in which the air supply amount adjusting plate is in the open state; Fig. 4 is a vertical cross-sectional view showing the installed state of the ventilation port cover according to the first embodiment, in which the air supply amount adjusting plate is in the closed state; An exploded perspective view of the ventilation port cover according to the first embodiment. Longitudinal cross-sectional view of the air supply amount adjusting plate in Embodiment 1 The figure which looked at the air supply amount adjustment plate concerning Embodiment 1 from the airflow control plate side Partially enlarged cross-sectional view enlarging the outer edge portions of the design plate and the airflow control plate in Embodiment 1 FIG. 2 is an exploded perspective view of the air supply amount adjusting plate according to the first embodiment; FIG. 10 is a chart showing changes in temperature over time after conducting a dew condensation test on the vent cover according to the first embodiment assuming actual usage conditions; FIG.

A ventilation port cover according to an embodiment of the present invention will be described in detail below with reference to the drawings. In addition, this invention is not limited by this embodiment.

Embodiment 1.
FIG. 1 is a vertical cross-sectional view showing an installed state of a ventilation port cover according to Embodiment 1 of the present invention, and is a view in which an air supply amount adjusting plate is in an open state. FIG. 2 is a vertical cross-sectional view showing the installed state of the ventilation port cover according to the first embodiment, and is a view in which the air supply amount adjusting plate is in the closed state. 3 is an exploded perspective view of the ventilation port cover according to the first embodiment. FIG.

The ventilation port cover 30 is used by being attached to the ventilation port formed in the wall or ceiling of the building. In Embodiment 1, a detailed configuration of the ventilation port cover 30 will be described using an example in which the ventilation port cover 30 is attached to the ventilation port 7 formed through the wall 11 of the building.

The ventilation port cover 30 includes a base body 2, an air supply amount adjusting plate 1, a unit 3, a filter 4, a filter restraint 5 and a packing 6. - 特許庁

The base body 2 has a tubular portion 2b and a flange portion 2a provided at the edge of an opening 2e on one end side of the tubular portion 2b and extending outward from the opening edge. The cylindrical portion 2b has a cylindrical shape. The flange portion 2a has a square shape when viewed along the central axis direction of the tubular portion 2b. In addition, in the following description, the state seen along the central axis direction of the tubular portion 2b is referred to as a front view. Moreover, the state seen along the direction perpendicular to the central axis of the cylindrical portion 2b is referred to as a side view.

The tubular portion 2b is inserted into the ventilation opening 7 formed in the wall 11 of the building. The flange portion 2 a in front view is larger than the opening area of the ventilation port 7 . The flange portion 2a has a thickness in a side view. A storage portion 2d, which is a recess in which the air supply amount adjusting plate 1 is fitted, is formed on the surface of the flange portion 2a facing away from the wall 11. As shown in FIG. The storage portion 2d has a quadrangular shape when viewed from the front. The side of the flange 2a across the wall 11 is the indoor side, and the opposite side is the outdoor side.

The unit 3 is fixed inside the tubular portion 2b. A method for fixing the unit 3 is not particularly limited. For example, the unit 3 may be engaged with the inner wall of the tubular portion 2b by rotating and inserting it inside the tubular portion 2b. The unit 3 has a structure in which the shaft 3a of the mechanism portion 3b expands and contracts along the central axis direction of the cylindrical portion 2b.

A filter 4 is fixed to the outdoor side of the unit 3 by a filter retainer 5 . The filter 4 prevents dust, insects, and the like from entering the room from the outside. The filter 4 is detachable so as to be replaceable.

The air supply amount adjusting plate 1 is a plate portion that faces the opening 2e on the one end side of the cylindrical portion 2b. The air supply amount adjusting plate 1 is fixed to a concave portion 3d formed in the shaft 3a of the unit 3 by a column portion described later. The air supply amount adjusting plate 1 is movable in the direction along the central axis of the tubular portion 2b as the shaft 3a expands and contracts.

The air supply amount adjusting plate 1 is moved toward the interior side along the central axis of the cylindrical portion 2b, thereby being in an open state in which a gap is formed between the plate 1 and the flange portion 2a as shown in FIG. When the air supply amount adjusting plate 1 is open, outdoor air can flow into the room through the gap between the air supply amount adjusting plate 1 and the flange portion 2a.

By moving the air supply amount adjusting plate 1 toward the outside of the room along the central axis of the cylindrical portion 2b, the gap between the plate 1 and the flange portion 2a is reduced as shown in FIG. When the air supply amount adjusting plate 1 is closed, the gap between the air supply amount adjusting plate 1 and the flange portion 2a is so small that almost no outdoor air can flow into the room.

The packing 6 is attached to the surface of the air supply amount adjusting plate 1 facing the flange portion 2a. The packing 6 is pressed against the flange portion 2a in the closed state to more reliably prevent the inflow of outdoor air into the room. The air supply amount adjusting plate 1 is normally in an open state. The air supply amount adjustment plate 1 is closed when the cold outside air that flows through the air supply port hits the body in winter and makes the occupant feel uncomfortable, or when there is a risk of strong wind blowing into the room from the outside during a typhoon. and prevents the inflow of outside air.

4 is a longitudinal sectional view of the air supply amount adjusting plate in Embodiment 1. FIG. The air supply amount adjusting plate 1 has an airflow control plate 1b as a first plate portion and a decorative plate 1a as a second plate portion. The airflow control plate 1b faces the opening 2e on the one end side of the tubular portion 2b. The design plate 1a is provided on the opposite side of the opening 2e across the airflow control plate 1b. A columnar portion 1d is formed on the airflow control plate 1b. This column portion 1d is fixed to the recessed portion 3d of the shaft 3a of the unit 3. As shown in FIG.

The outer edges of the design plate 1a and the airflow control plate 1b are in contact with each other. A gap is formed between the decorative plate 1a and the airflow control plate 1b inside the outer edge to form an air layer 1c. FIG. 5 is a diagram of the air supply amount adjusting plate according to the first embodiment as viewed from the airflow control plate side. FIG. 6 is a partially enlarged cross-sectional view enlarging the outer edge portions of the design plate and the airflow control plate in Embodiment 1. FIG. 7 is an exploded perspective view of the air supply amount adjusting plate according to the first embodiment. FIG. The decorative plate 1a and the airflow control plate 1b have engaging portions 1e and 1f that engage with each other at the central portions of the four corners and four sides of the quadrangular shape.

The engaging portion 1e of the design plate 1a is formed in a concave shape recessed toward the outer edge side at the root of a triangular rib having a triangular cross section that is formed on the outer edge and protrudes toward the airflow control plate 1b side. The engaging portion 1f of the airflow control plate 1b is formed by a protrusion protruding toward the concave portion of the triangular rib. By engaging the design plate 1a and the airflow control plate 1b with the engaging portions 1e and 1f, the design plate 1a and the airflow control plate 1b can be engaged with each other without providing holes. This makes it possible to prevent outside air from entering the air layer 1c.

The airflow control plate 1b has a flat plate portion 1g parallel to a plane including the edge of the opening 2e of the cylindrical portion 2b, and a tapered portion 1h that approaches the design plate 1a outward from the outer edge of the flat plate portion 1g.

Returning to FIGS. 1 and 2, a guide rib 2c, which is a rib, is formed on the inner surface of the housing portion 2d of the flange portion 2a. The guide rib 2c extends along the central axis direction of the tubular portion 2b and has a parallel edge 2f parallel to the tapered portion 1h. 2 f of parallel edges are provided in the position which contact|abuts when the air supply amount adjustment plate 1 of a closed state is pushed further to the outdoor side.

According to the ventilation port cover 30 described above, even if cold outside air hits the airflow control plate 1b and the temperature of the airflow control plate 1b drops, the heat conducted to the design plate 1a can be reduced by the air layer 1c. Even if the temperature of the airflow control plate 1b drops, the temperature drop of the design plate 1a can be suppressed. As a result, the difference between the temperature of the indoor air and the temperature of the surface of the decorative plate 1a can be reduced. It is possible to prevent indoor contamination due to dripping water.

In addition, since the tapered portion 1h formed in the airflow control plate 1b draws the air that hits the airflow control plate 1b toward the design plate 1a, outside air that hits the inner surface of the storage portion 2d of the flange portion 2a can be reduced. . As a result, it is possible to suppress a decrease in the temperature of the inner surface of the housing portion 2d of the flange portion 2a, suppress the occurrence of dew condensation, and prevent indoor pollution due to dripping of dew condensation water.

In addition, the air supply amount adjustment plate 1 can be operated to switch between the open state and the closed state by pushing it toward the outdoor side. The plate 1 tilts and becomes difficult to operate. In Embodiment 1, the tilt of the air supply amount adjusting plate 1 can be suppressed by the guide ribs 2c provided on the flange portion 2a, so that the operability of the air supply amount adjusting plate 1 can be improved.

FIG. 8 is a graph showing changes in temperature over time after conducting a dew condensation test on the vent cover according to the first embodiment assuming actual use conditions. As shown in FIG. 8, in the ventilation port cover 30 according to the first embodiment, the temperature of the design plate 1a surface and the inner wall surface of the storage portion 2d exceeds the dew point temperature, and it was confirmed that no condensation occurs. .

The configuration shown in the above embodiment shows an example of the content of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

1 air supply amount adjusting plate 1a design plate 1b airflow control plate 1c air layer 1d column portion 1e, 1f engagement portion 1g flat plate portion 1h taper portion 2 base body 2a flange portion 2b cylindrical shape Part 2c Guide rib 2d Storage part 2e Opening 2f Parallel edge 3 Unit 3a Axis 3b Mechanism part 3d Recess 4 Filter 5 Filter restraint 6 Packing 7 Vent 11 Wall 30 Vent cover .

Claims (5)

a cylindrical tubular portion;
a flange portion provided at an opening edge on one end side of the cylindrical portion and extending outward from the opening edge;
a plate facing the opening at one end of the cylindrical portion and movable in the central axis direction of the cylindrical portion;
The plate portion has a first plate portion facing the opening and a second plate portion provided on the opposite side of the opening with the first plate portion therebetween,
outer edges of the first plate portion and the second plate portion are in contact with each other, and an air layer is provided between the first plate portion and the second plate portion;
The plate portion has a quadrangular shape when viewed along the central axis direction,
The first plate portion and the second plate portion have engaging portions that engage with each other at the four corners of the quadrangular shape and the central portions of the four sides of the quadrangular shape. Features vent cover. The first plate portion has a flat plate portion parallel to a plane including the opening edge, and a tapered portion that approaches the second plate portion outward from the outer edge of the flat plate portion. The vent cover according to claim 1 . 3. The flange portion according to claim 2 , wherein a rib extending along the direction of the central axis and facing the tapered portion has a parallel edge parallel to the tapered portion. vent cover. a cylindrical tubular portion;
a flange portion provided at an opening edge on one end side of the cylindrical portion and extending outward from the opening edge;
a plate facing the opening at one end of the cylindrical portion and movable in the central axis direction of the cylindrical portion;
The plate portion has a first plate portion facing the opening and a second plate portion provided on the opposite side of the opening with the first plate portion therebetween,
outer edges of the first plate portion and the second plate portion are in contact with each other, and an air layer is provided between the first plate portion and the second plate portion;
The first plate portion has a flat plate portion parallel to a plane including the opening edge, and a tapered portion that approaches the second plate portion outward from the outer edge of the flat plate portion,
A ventilation port cover, wherein a rib extending along the central axis direction and facing the tapered portion and having parallel edges parallel to the tapered portion is formed on the flange portion. 5. The packing according to any one of claims 1 to 4, further comprising a packing that is provided on the first plate portion and contacts the flange portion when the first plate portion is moved toward the flange portion. or the vent cover according to one.

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