JP2020134002A - Ventilation port cover - Google Patents

Abstract

To obtain a ventilation port cover that can prevent condensation on a plate part without using a heat insulating material.SOLUTION: A ventilation port cover comprises: a cylindrical part having a cylindrical shape; a flange provided at an opening edge on one end side of the cylindrical part, and spreading outward from the opening edge; and a plate part 1 opposed to an opening on the one end side of the cylindrical part, and movable in a central axis direction of the cylindrical part. The plate part 1 comprises a first plate part 1b opposed to the opening, and a second plate part 1a provided opposite to the opening across the first plate part 1b. Outer edges of the first plate part 1b and the second plate part 1a are in contact with each other, and an air layer 1c is provided between the first plate part 1b and the second plate part 1a.SELECTED DRAWING: Figure 4

Description

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

In recent years, the airtightness of houses has been increasing. In highly airtight houses, exhaust fans are installed on the walls of the room 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 room. An air supply port 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 direction of the central axis of the air supply port so that the air supply port can be opened and closed. The plate portion is normally used in the open state, but can be closed in order to block the air supply air flowing into the room through the air supply port as needed. For example, when the cold airflow flowing through the air supply port hits the body in winter and the resident feels uncomfortable, or when there is a risk of strong wind blowing into the room from the outside during a typhoon, the air supply port is closed by the plate. Be done.

The air supply comes into contact with the plate facing the opening of the air supply port. When the cold air supply flowing in in winter comes into contact with the plate portion, the surface of the plate portion facing the room may condense due to the difference from the room temperature, and the condensed water may drip and pollute the room. Patent Document 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-A-2018-109469

However, when the heat insulating material is attached, troublesome work such as alignment is required, which causes a decrease in workability. In addition, the adhesive strength of the heat insulating material may decrease with time, and the heat insulating material may be peeled off.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a ventilation port cover capable of preventing dew condensation on a plate portion without using a heat insulating material.

In order to solve the above-mentioned problems and achieve the purpose, the ventilation port cover includes a tubular portion, a flange portion provided at the opening edge on one end side of the tubular portion, and a flange portion extending outward from the opening edge. It is provided with a plate portion that faces the opening on one end side 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 interposed therebetween, and has a first plate portion and a second plate portion. The outer edges of the plate are in contact with each other, and an air layer is provided between the first plate and the second plate.

According to the present invention, it is possible to obtain a ventilation port cover that can prevent dew condensation on the plate portion without using a heat insulating material.

It is a vertical sectional view which shows the installation state of the ventilation port cover which concerns on Embodiment 1 of this invention, and is the figure which the air supply amount adjustment plate is open state. FIG. 5 is a vertical cross-sectional view showing an installed state of the ventilation port cover according to the first embodiment, in which the air supply amount adjusting plate is in a closed state. An exploded perspective view of the ventilation port cover according to the first embodiment. Longitudinal sectional view of the air supply amount adjusting plate according to the first embodiment A view of the air supply amount adjusting plate according to the first embodiment as viewed from the airflow control plate side. Enlarged partial enlarged cross-sectional view of the outer edge portion of the design plate and the airflow control plate according to the first embodiment. An exploded perspective view of the air supply amount adjusting plate according to the first embodiment. The figure which recorded the temperature change with the lapse of time by carrying out the dew condensation test assuming the actual use condition in the ventilation port cover which concerns on Embodiment 1.

The ventilation port cover according to the embodiment of the present invention will be described in detail below with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a vertical cross-sectional view showing an 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 an open state. FIG. 2 is a vertical cross-sectional view showing an 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 a closed state. FIG. 3 is an exploded perspective view of the ventilation port cover according to the first embodiment.

The ventilation port cover 30 is used by being attached to a ventilation port formed on a wall or ceiling of a building. In the first embodiment, the detailed configuration of the ventilation port cover 30 will be described with reference to an example 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.

The base main body 2 has a tubular tubular portion 2b and a flange portion 2a provided at the opening edge which is the edge of the opening 2e on one end side of the tubular portion 2b and extends outward from the opening edge. The tubular portion 2b has a cylindrical shape. The flange portion 2a has a quadrangular shape when viewed along the central axis direction of the tubular portion 2b. In the following description, the state of the tubular portion 2b viewed along the central axis direction is referred to as front view. Further, the state of being viewed along the direction perpendicular to the central axis of the tubular portion 2b is referred to as side view.

The tubular portion 2b is inserted into the ventilation port 7 formed on the wall 11 of the building. The flange portion 2a in the 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 into which the air supply amount adjusting plate 1 is fitted, is formed on the surface of the flange portion 2a facing the side opposite to the wall 11. The storage portion 2d has a quadrangular shape when viewed from the front. The side where the flange portion 2a is located across the wall 11 is indoors, and the opposite side is outdoor.

The unit 3 is fixed inside the tubular portion 2b. The method of 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 inserting it while rotating it inside the tubular portion 2b. The unit 3 has a structure in which the shaft 3a of the mechanical portion 3b expands and contracts along the central axis direction of the tubular portion 2b.

The filter 4 is fixed to the outdoor side of the unit 3 by the filter restraint 5. The filter 4 prevents dust, insects, and the like from entering the room from the outside. The filter 4 is removable so that it can be replaced.

The air supply amount adjusting plate 1 is a plate portion facing the opening 2e on one end side of the tubular portion 2b. In the air supply amount adjusting plate 1, a pillar portion described later is fixed to a recess 3d formed in a shaft 3a of the unit 3. The air supply amount adjusting plate 1 is movable in a direction along the central axis of the tubular portion 2b as the shaft 3a expands and contracts.

The air supply amount adjusting plate 1 moves to the indoor side along the central axis of the tubular portion 2b, so that a gap is formed between the air supply amount adjusting 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 to the outdoor side along the central axis of the tubular portion 2b, the air supply amount adjusting plate 1 is in a closed state in which the gap with 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 small, and 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 and comes into contact with the packing 6 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 adjusting plate 1 is closed when the cold outside air flowing in through the air supply port hits the body in winter and the resident feels uncomfortable, or when a strong wind may blow into the room from the outside during a typhoon. The inflow of outside air is prevented.

FIG. 4 is a vertical cross-sectional view of the air supply amount adjusting plate according to the first embodiment. The air supply amount adjusting plate 1 has an air flow control plate 1b, which is a first plate portion, and a design plate 1a, which is a second plate portion. The airflow control plate 1b faces the opening 2e on one end side of the tubular portion 2b. The design plate 1a is provided on the opposite side of the opening 2e with the airflow control plate 1b interposed therebetween. A columnar pillar portion 1d is formed on the airflow control plate 1b. The pillar portion 1d is fixed to the recess 3d of the shaft 3a of the unit 3.

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 design plate 1a and the airflow control plate 1b, which are inside the outer edge, to form an air layer 1c. FIG. 5 is a view 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 of the outer edge portions of the design plate and the airflow control plate according to the first embodiment. FIG. 7 is an exploded perspective view of the air supply amount adjusting plate according to the first embodiment. The design plate 1a and the airflow control plate 1b have engaging portions 1e and 1f that engage with each other at the four corner portions and the central portions of the four sides of the quadrangular shape.

The engaging portion 1e of the design plate 1a is formed in a concave shape having a cross section formed on the outer edge and protruding toward the airflow control plate 1b, which is recessed toward the outer edge side at the base of the triangular rib. The engaging portion 1f of the airflow control plate 1b is formed by a protruding portion protruding toward the recess of the triangular rib. By engaging the design plate 1a and the airflow control plate 1b with the engaging portions 1e and 1f, it is possible to engage the design plate 1a and the airflow control plate 1b with each other without providing holes. This makes it possible to prevent the intrusion of outside air into the air layer 1c.

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

Returning to FIGS. 1 and 2, guide ribs 2c, which are ribs, are formed on the inner surface of the storage 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. The parallel edge 2f is provided at a position where the closed air supply amount adjusting plate 1 comes into contact with the closed air supply amount adjusting plate 1 when it is further pushed outward.

According to the ventilation port cover 30 described above, even if the 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 by the air layer 1c can be reduced. Even if the temperature of the airflow control plate 1b decreases, the decrease in the temperature 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 design plate 1a can be reduced, and it becomes difficult for the design plate 1a to reach the dew point temperature under the indoor environmental conditions, the occurrence of dew condensation is suppressed, and dew condensation occurs. It is possible to prevent indoor pollution due to dripping of water.

Further, since the air that hits the airflow control plate 1b is attracted to the design plate 1a side by the tapered portion 1h formed on the airflow control plate 1b, the outside air that hits the inner side surface of the storage portion 2d of the flange portion 2a can be reduced. .. As a result, it is possible to suppress a temperature drop on the inner surface of the storage portion 2d of the flange portion 2a, suppress the occurrence of dew condensation, and prevent indoor pollution due to dripping of dew condensation water.

Further, the air supply amount adjusting plate 1 can be operated to switch between the open state and the closed state by pushing it to the outdoor side, but when a place outside the central portion of the design plate 1a is pushed in, the air supply amount adjusting plate 1 is adjusted. The plate 1 is tilted and difficult to operate. In the first embodiment, since the inclination of the air supply amount adjusting plate 1 can be suppressed by the guide rib 2c provided on the flange portion 2a, the operability of the air supply amount adjusting plate 1 can be improved.

FIG. 8 is a diagram in which a dew condensation test was carried out on the ventilation port cover according to the first embodiment assuming actual use conditions, and a temperature change with the passage of time was recorded. As shown in FIG. 8, in the ventilation port cover 30 according to the first embodiment, the temperatures of the surface of the design plate 1a and the inner wall surface of the storage portion 2d were higher than the dew point temperature, and it was confirmed that no dew condensation occurred. ..

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 Air supply amount adjustment plate, 1a design plate, 1b air flow control plate, 1c air layer, 1d pillar part, 1e, 1f engagement part, 1g flat plate part, 1h taper part, 2 base body, 2a flange part, 2b tubular 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 ventilation port, 11 wall, 30 ventilation port cover ..

Claims (5)

Cylindrical tubular part and
A flange portion provided on the opening edge on one end side of the tubular portion and extending outward from the opening edge,
A plate portion that faces the opening on one end side of the tubular portion and is movable in the central axis direction of the tubular portion is provided.
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 interposed therebetween.
The 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. Ventilation port cover featuring. The plate portion has a quadrangular shape when viewed along the central axis direction.
The first plate portion and the second plate portion have an engaging portion that engages with each other at the four corner portions of the quadrangular shape and the central portions of the four sides of the quadrangular shape. The ventilation port cover according to claim 1. The first plate portion is characterized by having a flat plate portion parallel to a flat surface 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 ventilation port cover according to claim 1 or 2. The third aspect of claim 3, wherein the flange portion is formed with a rib extending along the central axis direction and having a parallel edge parallel to the tapered portion so as to face the tapered portion. Ventilation port cover. Any of claims 1 to 4, further comprising a packing provided on the first plate portion and in contact with the flange portion when the first plate portion is moved to the flange portion side. Ventilation port cover described in one.