JPH04327752A - Damper device - Google Patents

Abstract

PURPOSE:To enable a dew formation to be prevented even if a special thermal insulation work is not carried out. CONSTITUTION:A body 1 constituting an air passage is integrally disposed at both ends of a barrel 4 of thermal insulating resin acting as connecting openings of both ends under its inserting operation. Accordingly, since the body itself has a thermal insulating characteristic and a thermal insulating covering may easily be provided at the connection parts of both ends of the body, prevention of dew formation can be attained at a low cost even if a special thermal insulating work is not performed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper device which is mainly installed in the middle of a ventilation system through which cooling air passes, and which opens and closes the ventilation system and adjusts the amount of ventilation.

0002

BACKGROUND OF THE INVENTION Conventional damper devices of this type are disclosed in, for example, Japanese Patent Application Laid-open No. 1-127850 and Japanese Patent Application Laid-open No. 2-1999.
The configuration is as disclosed in Japanese Patent No. 115650. That is, disc-shaped blades are provided in a cylindrical sheet metal main body, and the blades are rotated by a motor or a rotary solenoid. The main body is connected to a duct that constitutes a ventilation system, and forms part of the ventilation system. When the blades are open, they are parallel to the airflow, and when closed, they are perpendicular to the airflow, closing the ventilation path of the main body. A drive device such as a motor or a rotary solenoid for moving the blades is attached to the outside of the main body via a mounting member, and its output shaft is connected to the blades inside the main body.

[0003] In the damper device having the above structure, the blades are moved by applying electricity to the drive device, and the ventilation system can be opened or closed. For example, if the ventilation system is configured as a conveyance path that sends cold air for cooling to each room, damper devices for rooms that require cooling are opened, and damper devices for rooms that do not require cooling are closed. This allows each room to be cooled as needed.

0004

[Problem to be Solved by the Invention] When a cooling ventilation system including a damper device as described above is configured, the ventilation system is installed in the ceiling of a building, and when cooling, the temperature is approximately 10°C. cold air will flow. The temperature in the attic where it is installed is usually around 32 degrees Celsius in the summer, and it is humid. Therefore, it is necessary to take measures against dew condensation for the ventilation system in the attic area, and the area formed by the duct is covered with a heat insulating material. However, a heat insulating coating for the damper device is often omitted because it is cumbersome and expensive to construct, and condensation in this area may cause the ceiling to leak.

[0005] The present invention has been made in order to solve such conventional problems, and an object of the present invention is to provide a damper device having a heat insulating function capable of preventing dew condensation without the need for special heat insulating work.

[0006]

[Means for Solving the Problems] A damper device according to the present invention integrates a body constituting an air passage with inserts into both ends of a body made of a heat-insulating resin, with a cylinder made of sheet metal as connection openings at both ends. It has become.

[0007]

[Operation] In the damper device according to the present invention, the body has heat insulating properties, and the connecting parts at both ends of the body can be easily covered with heat insulating coating along with the connecting duct, so that condensation can be prevented without special insulation work. It will be possible to prevent this.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a damper device showing an embodiment of the present invention, FIG. 2 is a side view thereof, and FIGS. 3 and 4 are schematic sectional views of essential parts, respectively. In the damper device of this embodiment, an elliptical blade 2 is supported by a shaft so as to be rotatable about its short axis in a cylindrical body 1 with open ends and an air passage having a circular cross section. . Both ends of the body 1 have a cylindrical body 3 made of sheet metal that can be connected to a duct as connection openings.
The body 4 is made of a heat-insulating resin such as vinyl chloride or styrene. The cylindrical body 3 is integrated with the body 4 by an insert when the body 4 is molded, and is integrated with the body 4 depending on the connection method (external fit or internal fit) with the duct, as shown in FIGS. 3 and 4. Further, a motor 6 is attached to the outer peripheral portion of the body 1 via a mounting leg 5, and its rotating shaft is connected to the shaft of a blade 2 pivotally supported within the body 1 so as to be capable of transmitting torque. The blade 2 is formed into an ellipse shape similar to the shape of the cut surface when the air passage of the body 1 is cut diagonally, and the shaft is fixed on the short axis of the blade 2.

[0009] The damper device having the above structure is installed near the air outlet to each room of the cooling duct system or the heating duct system in a central heating and cooling system, and is used to open and close the ventilation path of the part as necessary. Become. In this damper device, since the blade 2 is not circular but oval, the amount of rotation from fully open to fully closed is small, and by adjusting the amount of rotation, it is possible to finely adjust the amount of ventilation.
The shape of the blade 2 also improves the closing performance by itself. If a cooling ventilation system including a damper device is configured as described above, the ventilation system will be installed in the ceiling of the building, and cold air of approximately 10 degrees Celsius will flow during cooling. . At this time, the temperature in the attic is usually around 32 degrees Celsius in the summer, and it is humid, but the part made up of the duct is covered with heat insulating material, and the body 4 of the damper device has heat insulating properties, so the whole system The insulation will prevent condensation from leaking through the ceiling. That is, prevention of dew condensation in the damper device can be realized at low cost.

0010

As is clear from the above description of the embodiments, according to the present invention, dew condensation can be prevented without special insulation work, and dew condensation can be prevented at low cost.

[0011]

[Brief explanation of drawings]

FIG. 1 is a front view of a damper device according to the invention.

FIG. 2 is a side view of the damper device according to the invention.

FIG. 3 is a schematic cross-sectional view showing the structure of the body of the damper device according to the present invention.

FIG. 4 is a schematic cross-sectional view showing the structure of the body of the damper device according to the present invention.

[Explanation of symbols]

1 Body 2 Blade 3 Cylindrical body 4. Torso 6 Motor

Claims (1)

[Claims] 1. A damper device in which a blade is installed in a body constituting an air passage with a circular cross section, and the blade is rotated by a motor to open and close the air passage of the body, the body being made of sheet metal. A damper device characterized in that a cylindrical body is integrated into both ends of a body made of heat-insulating resin with inserts as connection openings at both ends.