JPH0464856A - Air blowing port device of ventilation and air conditioning device - Google Patents

Abstract

PURPOSE:To prevent occurrence of air blowing sound, eliminate any noisy sound and provide a silent sound by a method wherein a wall thickness part at an inner circumference of a cylinder part is provided with a curved line inner surface contacting along an outer circumference of a damper in the same degree as that of a sealing member along an outer circumference of a damper and then a circular damper is made such that a contact starting part starting a contact at the curved line inner surface of the thickened part at a certain inclination and a contact completed part are arranged at the thickened part at a certain angle. CONSTITUTION:When a damper 7 performs a closing operation and a sealing member 8 at an outer circumference of the damper 7 under a certain angle is contacted with a thickened part 10, a contact starting part 17 is arranged in such a way as the sealing member 8 is concurrently contacted with another semi-circular thickened part 11. When the damper 7 performs an opening operation and the sealing member 8 completes a contact at a certain angle with the thickened part 10, the contact completion part 18 is provided in such a way as the sealing member 8 may complete its contact at the other semi-circular thickened part 11. A thickened part 16 near a damper shaft 6 may always contact with the sealing member 8. Accordingly, a gradual narrowing or gradual widening of the aeration passage does not occur, so that an occurrence of air blowing sound is restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ceiling-embedded outlet device for an air conditioner.

BACKGROUND OF THE INVENTION A main body of a ventilation air conditioning unit for air conditioning and ventilation is provided in the attic of a conventional building. This ventilation air conditioning unit has a configuration as shown in FIG. That is, the ventilation air conditioning unit has a main body 2 having an adapter 1 serving as a duct connection part, and a grill 3 joined to the main body 2. This grill 3 is provided with a control plate 4 for adjusting the wind direction. A cylindrical portion 5 is provided inside the main body 2, and a disk-shaped damper 7 is provided within the cylindrical portion 5 and fixed to a damper shaft 6 connected to a damper motor (not shown).
The entire outer peripheral end of the damper 7 is in contact with the inner periphery of the cylindrical portion 5, and a sealing material 8 made of a flexible resin material is fixed thereto. The sealing material 8 is configured such that its tip is strongly pressed against the inner periphery of the cylindrical portion 5. Conventionally, when ventilating cooled air and heated air indoors, the damper 7 is rotated 90 degrees and oriented vertically to ventilate the air toward the grill 3. When the air blowing was to be stopped F, the damper 7 was further rotated by 90 degrees so as to be horizontal as shown in the figure, and the ventilation into the room was stopped.

Problems to be Solved by the Invention In such a conventional configuration, the damper 7 is opened and closed every time the air conditioning is started or stopped. Immediately before this, the gap between the inner periphery of the cylindrical portion 5 and the sealing material fixed to the damper 7 gradually decreases, and at this time, a draft block occurs. Since the ventilation is directly transmitted to the occupants through the grill 3, there is a problem that the ventilation can cause discomfort.

The present invention is intended to solve the above-mentioned conventional problems, and aims to provide noise reduction that prevents the generation of drafts and eliminates harsh noise.

Means for Solving the Problem In order to solve this problem, the present invention includes a cylindrical portion formed in a cylindrical shape, a circular damper fixed to a damper shaft within the cylinder, and a flexible material on the outer periphery of the damper. A sealing material made of a resin material is fixed, and a thick part of the inner periphery of the cylindrical part is provided with a sealing material along the outer periphery of the damper.
It has a curved inner surface that contacts the sealing material to the same extent, and further includes a contact start portion that simultaneously starts contacting the curved inner surface of the thick portion with the circular damper at a certain inclination, and a contact initiation portion where the circular damper simultaneously starts contact with the curved inner surface of the thick portion at a certain inclination. The contact completion portion at which the contact ends is formed so that the thick portion is angled.

Effect: With this configuration, when the circular damper is closed,
At a certain angle of the damper, the sealing material on the outer periphery contacts the thick inner periphery at the same time, so ventilation can be immediately blocked. At the same time, the contact on the thick part of the inner periphery is completed, so ventilation starts immediately, and the ventilation can be started or shut off in a short time when the damper opens and closes, which prevents drafts from occurring. This eliminates narrow gaps and eliminates ventilation stands.

EXAMPLE Hereinafter, an example according to the present invention will be explained based on FIGS. 1 and 2. Note that the same reference numerals as in the prior art indicate the same parts, and the explanation will be omitted. That is, the inside of the main body 2 has a cylindrical portion 5, and the cylindrical portion 5 has a thick wall portion 10 and a thick wall portion 11 on the inner periphery thereof. The inner peripheral portion of the portion 5 is provided symmetrically. One semi-inner thick portion 10 has an inner surface forming a curved surface 12 along the inner side, and this curved surface 12 always has the same contact strength while the sealing material 8 rotates and contacts the curved surface 127. As such, it is a three-dimensional curved surface having the same center point as the center of the circular damper 7. Further, the curve 12 indicates that when the damper 7 performs a closing operation, for example, when the damper 7 rotates in the six directions shown in FIG. 2 and reaches a certain arbitrary angle, the damper 7
The sealing material 8 on the outer periphery of the damper 8 has a thick part starting part 13 having approximately the same angle as the damper 7 so that a half circumference of the bulge contacts the thick part 10 at the same time. Similarly, when performing the opening operation of the damper 7, the damper 7 is set so that the contact with the thick part 10 ends half way around at approximately the same angle as the arbitrary angle at which it starts contacting the thick part 10 during the closing operation. Thick end portion 14
have. The thick part 15 between the thick part start part 13 and the thick part end part 14 is formed on the damper shaft 6 so that the sealing material 8 has the same contact strength during rotation and contact. It is a three-dimensional curved surface with the same center point as the center. Moreover, the thick part 11 on one half inner side is the thick part 1
It has become the object shape of (stopped at 0).

In the above configuration, when the damper 7 performs a closing operation, the sealing material 8 on the outer circumference of the damper 7 is exposed to the thick part 1 at a certain angle.
0, the thick part starting part 17 is set so that the sealing material 8 simultaneously contacts the other hand side thick part 11.
and when the damper 7 performs the opening operation,
A thick part end part 18 is provided so that when the sealing material 8 completes contact with the thick part 10 at a certain angle, the sealing material 8 simultaneously completes contact with the other thick part 11 on the inner side. be. In addition, the thick portion 16 near the damper shaft 6 is
It is always in contact with the sealing material 8. In this way, when the damper 7 is closed, the sealing material 8 starts contacting the thick portion at a certain angle, and when the damper 7 is opening, it simultaneously completes contact with the thick portion at a certain angle. Since the ventilation section does not gradually become narrower or wider, the generation of ventilation noise can be suppressed.

Effects of the Invention As is clear from the description of the embodiments described above, the present invention has a configuration in which a mutually symmetrical thick wall portion is provided on the inner periphery of the cylindrical portion, and the circular dampers start and complete contact at the same time. , the ventilation section does not gradually narrow or gradually widen, so no ventilation noise is generated, and comfortable air conditioning can be provided without causing discomfort to the occupants and without causing harshness. This has the effect of

[Brief explanation of drawings]

Fig. 1 is a cross-sectional configuration diagram of an air outlet device of a ventilation air conditioning unit according to an embodiment of the present invention, Fig. 2 is a sectional view of the air outlet device of the ventilation air conditioning unit when contact with the damper is completed, and Fig. 3 is a sectional view of the air outlet device of a conventional ventilation air conditioning unit. FIG. 3 is a sectional view of an air outlet device of the ventilation air conditioning unit. 2...Main body, 5...Cylindrical portion, 6...
...Damper shaft, 7...Damper, 8
...Sealing material, 10゜11...Thick part, 12...Curved inner surface, 13.17...
Contact start part, 14.18/old... contact completion part.

Claims (1)

[Claims] The main body of the outlet device includes a cylindrical portion formed in a cylindrical shape, and a circular damper fixed to a damper shaft within the cylinder, and a sealing material made of a flexible resin material is fixed to the outer periphery of the damper, The thick inner circumference of the cylindrical portion has a curved inner surface that contacts the sealing material along the outer circumference of the circular damper, and the circular damper has a curved inner surface of the thick wall at a certain inclination at the same time. An air outlet device for a ventilation air-conditioning unit, wherein the thick portion includes a contact start portion that starts contact with the circular damper, and a contact completion portion that similarly ends contact with the circular damper at a certain inclination.