JPH0528412Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a ventilation fan that is installed on a ceiling or the like and ventilates through a ventilation duct.

[Conventional technology]

Fig. 3 is a cross-sectional view showing a conventional ventilation fan disclosed in, for example, Japanese Utility Model Application Publication No. 50-136806. 2, the lower surface of which is inclined, and a drain pipe 3 is provided at the bottom thereof. Reference numeral 4 denotes a mounting foot provided within the casing, on which a blower 7 consisting of blades 5 and an electric motor 6 is provided. 8 is a ventilation duct connected to the duct connection port 2.

A conventional ventilation fan is configured as described above, and by operating the blower, indoor air is sucked in through one ventilation duct 8 and exhausted to the outside through the other ventilation duct 9. Drainage generated inside or in the ventilation duct 8 is collected in the lower part of the casing 1 and discharged through a drain pipe 3.

[The problem that the idea attempts to solve]

In the conventional ventilation fan as described above, the casing 1 provided with the electric motor 6 and the ventilation duct 8 are connected, so vibrations generated from the electric motor 6 etc. are transmitted into the room via the ventilation duct 8, increasing noise. I have an assignment.

This invention was made to solve this problem, and the purpose is to obtain a ventilation fan with low noise, in which the vibrations generated in the ventilation fan body are not transmitted to the ventilation duct.

[Means to solve the problem]

The ventilation fan according to this invention has a ventilation fan main body fitted into an outer cylinder to which a ventilation duct is connected, and an elastic gasket is interposed between the frame of the ventilation fan main body and the outer cylinder.

[Effect]

In this invention, the ventilation fan body is fitted into the outer cylinder to which the ventilation duct is connected, so the ventilation fan body can be easily removed during repairs, and the frame of the ventilation fan body and the outer cylinder can be easily removed. Since the elastic gasket is interposed between the ventilation fans, vibrations from being transmitted from the ventilation fan body are prevented.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of this invention, 3 to 8 indicate the same or equivalent parts as the above-mentioned conventional example, and 9 is a frame body formed in a cylindrical shape with both ends open;
A blower 7 is provided within this frame via mounting legs 4 to form a ventilation fan main body 10. Reference numeral 11 denotes an outer cylinder formed into a cylindrical shape into which the ventilation fan main body 10 is inserted, and ventilation duct connection ports 12 are formed at both ends, and two strips 14 are formed in the middle part with a series of recesses 13 in the inner wall. . 15 is the concave portion 13 of this band-shaped portion 14
This is a ring-shaped packing having elasticity so as to be in contact with the entire outer peripheral wall of the frame body 9.

In the ventilation fan configured as described above, when the blower 9 is operated, indoor air is sucked in through the ventilation duct 8 and exhausted to the outside through the other ventilation duct. At this time, the vibrations generated in the ventilation fan body 10, especially the electric motor 6, are buffered by the elasticity of the gasket 15, and the outer cylinder 11
It is not transmitted to the room through the ventilation duct 8. In addition, the packing 15 is
1 and the frame 9 of the ventilation fan main body 10, the exhaust air does not flow backward through this gap.

In addition, in the above embodiment, the packing 15 is attached to the frame 9.
Although they are provided in a ring shape so as to be in contact with the entire outer circumferential wall, the initial purpose can also be achieved by providing a plurality of them at predetermined intervals without contacting the entire outer circumferential wall. In addition, as shown in Fig. 2, the packing 15
By providing a ventilation duct connection port 12 and fitting the ventilation duct 12 into this, it becomes possible to prevent air leakage and drain leakage from the fitting portion, and the shape of the outer cylinder 11 is also simplified. Ru.

[Effect of idea]

As explained above, this idea consists of a ventilation fan body in which a blower is attached via mounting legs inside a cylindrical lower frame with openings at both ends, and an exterior in which the ventilation fan body is fitted and ventilation duct connection ports are provided at both ends. By interposing an elastic packing between the frame body of the ventilation fan main body and the outer cylinder, vibrations generated in the ventilation fan main body are not transmitted to the ventilation duct via the outer cylinder, This has the effect of reducing noise.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of this invention, Fig. 2 is a sectional view showing another embodiment of this invention, and Fig. 3 is a sectional view showing another embodiment of this invention.
The figure is a sectional view showing a conventional ventilation fan. In addition, the same reference numerals in each figure indicate the same or equivalent parts, 4 is the mounting foot, 7 is the blower, 9 is the frame, 10
11 is the ventilation fan body, 11 is the outer cylinder, 12 is the ventilation duct connection port, and 15 is the packing.

Claims (1)

[Scope of utility model registration request] The above-mentioned ventilation fan main body comprises a ventilation fan main body in which a blower is attached via mounting legs in a cylindrical frame with both ends open, and an outer cylinder into which the ventilation fan main body is fitted and ventilation duct connection ports are provided at both ends. A ventilation fan characterized in that an elastic packing is interposed between the frame body and the outer cylinder.