JPH0541313Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an air supply port that eliminates the generation of negative pressure in a room when a ventilation fan is operated and improves the ventilation efficiency of the ventilation fan.

(Conventional configuration and its problems) In recent years, with the modernization of housing, the airtightness inside buildings has improved significantly, and for this reason, air supply ports that communicate with the outside are being used.

Conventionally, as such an air supply port, as shown in FIGS. 5 and 6, a short cylindrical portion b of an air supply port main body a is
A circular plate d having fan-shaped ventilation holes c perforated on all sides is integrally attached to the open end of the shutter plate d, and a shutter plate f having fan-shaped openings e perforated on all sides is arranged so as to overlap this circular plate d. It is known that the rotary shaft of a rotary solenoid g is fixed to the center of the shutter plate f, and the rotary solenoid g is energized to rotate the shutter plate f and change it from a closed state to an open state.

However, in an air supply port with such a structure,
Even if the fan-shaped ventilation hole c of the short cylinder part b and the fan-shaped opening e of the shutter plate f are in full communication, the opening area is only one-half or less of the total area, and the air supply efficiency is reduced. The problem was that it was low.

(Purpose of the invention) The present invention eliminates the above conventional problems.
To provide an air supply port which greatly increases the air supply opening area formed by the shutter opening/closing operation and further improves air supply efficiency.

(Structure of the invention) The air supply port of the invention to achieve the above purpose is as follows:
A shutter plate that opens and closes the opening is pivotally supported in the short cylindrical part of the air supply port body, which has a short cylindrical part that opens in the front-rear direction, so that it can rotate freely in the front-rear direction, and a weight is attached to the lower end of this shutter plate and the A displacement body is connected between the short cylindrical part of the air vent body and the appropriate position of the shutter plate to rotate the shutter plate in the opening direction against the weight of the weight that is contracted by applying electricity, thereby changing the shutter from the closed state to the open state. The opening of the short cylindrical portion is opened almost entirely.

(Description of Embodiment) Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 denotes an air supply port main body having a short cylindrical portion 2 that is fully opened in the front-rear direction, and frame plates 3 and 4 are integrally fixed to the upper and lower portions of the inner circumferential surface of the protruding end opening of the short cylindrical portion 2. . Reference numeral 5 denotes a shutter plate disposed in the opening between the upper and lower frame plates 3 and 4 so as to be openable and closable, and rotary shafts 6 and 6 are protruded from the center of both end faces of the shutter plate. are rotatably supported by bearings 7, 7 fixed to both sides of the inner circumferential surface of the open end of the short cylindrical portion, respectively, so that the shutter plate 5 can be opened and closed in the front-rear direction.

Reference numeral 8 denotes a mounting body made of an insulating material that protrudes from the center of one side of the shutter plate 5, and a mounting body 9, also made of an insulating material, is fixed to the inner peripheral surface of the short cylindrical portion 2 vertically above the mounting body 8. A spirally twisted displacement body 10, which expands and contracts by reversible displacement due to temperature changes, is stretched between these two attachment bodies 8 and 9.

Reference numeral 11 denotes a weight attached to the lower end of the shutter plate 5, which normally uses its weight to hold the shutter plate 5 in an upright position and close the opening.

Reference numeral 12 denotes a stopper protruding from the center of the lower frame plate 4, which receives the lower end of the shutter plate 5 to prevent it from rotating.

A connector 13 connects the displacement body 10 and a power cord 14 that supplies electricity to the displacement body 10.

The operation of the air supply port constructed as described above will be described below.

First, if the power cord 14 is not energized,
Due to the weight of the weight 11, the shutter plate 5 closes the air supply opening, and the displacement body 1
0 is held in an expanded state.

Next, when the power cord 14 is energized, the displacement body 1
0 shrinks, and a torque is generated to rotate the shutter plate 5 through the mounting body 8, and the shutter plate 5 tilts around the shafts 6, 6 against the weight of the weight 11, and the air supply opening opens. This will fully open up the

(Effect of the invention) As described above, according to the directional air supply port, the shutter plate is rotatably supported in the front-rear direction at the open end of the short cylinder part that opens in the front-rear direction, and the short cylinder part and the shutter plate are We connected a displacement body between the appropriate places that shrinks when energized and rotates the shutter plate in the opening direction against the weight of the weight attached to the lower end of the shutter plate. Not only can it be kept closed, but when electricity is applied, the shutter plate can be tilted to open the opening of the air supply port extremely widely, further increasing air supply efficiency.

Furthermore, because of its simple structure, there are few failures and it can be used for a long period of time, so it has great practical effects.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention; FIG. 1 is a perspective view thereof, FIG. 2 is a cross-sectional view of the open state, FIG. 3 is a cross-sectional view of the closed state, and FIG.
The figure is an exploded perspective view of the shutter mechanism, FIG. 5 is a perspective view of a conventional air supply port, and FIG. 6 is a sectional view thereof. 1...Air supply port body, 2...Short cylinder part, 5...Shutter plate, 6...Shaft, 8, 9...Mounting body,
10...displacement body, 11...weight, 14...power cord.

Claims (1)

[Scope of utility model registration request] A shutter plate that opens and closes the opening is rotatably supported in the short cylinder part of the air supply port main body, which has a short cylinder part that opens in the front-rear direction, and a weight is attached to the lower end of this shutter plate. An air supply port is formed by connecting a displacement body between the short cylindrical part of the mouth body and the appropriate position of the shutter plate by applying electricity to reduce the size and rotate the shutter plate in the opening direction against the weight of the weight.