JPH0282043A - Ventilating fan for duct - Google Patents

Abstract

PURPOSE:To enable closing of a gap between the delivery port of a body and a blast port of a casing by a method wherein conical protrusion parts formed on the upper and the lower part of the blast port of the casing are engaged with the hole of the tongue part mounted to the delivery port of the body and the hole of the top surface of the body to secure the casing to the body. CONSTITUTION:When a casing 5 is inserted in a body 1 to secure it thereto, a position relation between a hole 4b of a tongue part 4a mounted to the lower side of a delivery port 4 of the body 1 and a hole 4c of a top surface 1a of the body 1 and upper and lower protrusion parts 5a of a blast port 7 of the casing 5 is set so that during engagement therebetween, no gap is provided between the delivery port 4 of the body 1 and the blast port 7 of the casing 5 and to adhere the casing and the body to each other. Besides, since the protrusion part 5a of the casing 5 is formed in the shape of a cone, when the protrusions are fitted with the holes 4b and 4c to press the protrusion parts therein, the body 1 and the casing 5 are pulled to each other and are reliably adhered to each other for fixing. Thus, when the casing 5 is inserted in the body 1 and secured thereto, a gap between the delivery port 4 of the body 1 and the blast port 7 of the casing 5 can be very simply prevented from provision without needing special parts.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a duct ventilation fan that is attached to the ceiling of a living room and connects a duct that communicates with the outdoors to exchange air in the living room. .

BACKGROUND OF THE INVENTION Conventionally, this type of duct ventilation fan has generally been constructed as shown in FIGS. 3 and 4. That is, the ceiling surface 10
An electric motor 103 with blades 102 fixed inside the main body 101 is fixed to the top surface 101a of a box-like main body 1o1 inserted into the opening of the main body 101, and one side of the main body 101 1o1
A discharge port 104 is provided in b, and a casing 105 surrounding the blades 102 is inserted and fixed inside the main body 101, and the discharge port 104 of the main body 101 and the air outlet 1 of the casing 105 are connected.
07, and a gasket 106 was interposed at the contact portion between the discharge port 104 and the air blowing port 107 to ensure airtightness.

Problems to be Solved by the Invention In such a conventional configuration, if the packing 106 peels off or deteriorates during assembly or maintenance, the discharge port I04 of the main body 101 and the casing 10
A gap is created between the air vents 107 of 6, causing air leakage, and it is also quite time-consuming to reliably attach the gasket 106 during assembly work.

The present invention solves these problems, and aims to reliably close the gap between the discharge port of the main body and the ventilation port of the casing without requiring much effort.

Means for Solving the Problem In order to solve this problem, the present invention fixes an electric motor with blades fixed inside the main body to the top surface of a box-like main body that is inserted into an opening in the ceiling surface. Further, a tongue portion bent inward is formed on the lower side of the discharge port provided on one side of the main body, and a hole is provided in the tongue portion and an upper portion of the discharge port on the top surface of the main body. A duct ventilation fan comprising a casing inserted into the main body and surrounding the blades, and fixed to the main body by fitting conical protrusions provided at the upper and lower parts of the air outlet into the holes. It is.

With this configuration, when the casing is fixed inside the main body, the protrusion provided at the air outlet of the casing fits into the hole in the top surface of the main body and the tongue of the outlet, and this protrusion has a conical shape. Therefore, when the casing and the main body are inserted into the hole, the casing and the main body are pulled up against each other, eliminating any gaps and making sure and easy contact.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 1 is a box-shaped main body that is inserted and fixed into an opening in a ceiling surface 6. An electric motor 3 with blades 2 fixed inside the main body 1 is fixed to the top surface 1a, and a discharge port is provided on a side surface 1b. 4 is provided, and a tongue portion 4a is formed at the lower side of the discharge port 4 by being bent inward of the main body 1 and having two holes 4b at both ends. Further, two holes 4C are provided above the discharge port 4 on the top surface 1a. Furthermore, there are blades 2 inside the main body 1.
A casing 5 is inserted to surround and guide wind, and the casing 5 is fixed to the upper and lower parts of the blower lower of the casing 5 so as to face upward and communicate the blower lower of the casing 6 and the discharge port 4 of the main body 1, respectively. When the holes 4b, 4
A conical protrusion 6& is provided which fits into the c.

In the above configuration, when inserting and fixing the casing 5 inside the main body 1, the air is blown between the hole 4b of the tongue 4a provided at the lower side of the outlet 4 of the main body 1, the hole 4C of the top surface 1a of the main body 1, and the casing 5. The positional relationship between the upper and lower protrusions 5a of the lower is such that when they are fitted together, there is no gap between the discharge port 4 of the main body 1 and the blower lower of the casing 5, so that they are in close contact with each other. Moreover, since the protrusion 5a of the casing 5 has a conical shape, when the protrusion 5a of the casing 5 is inserted into the holes 4b and 4c and pushed in, the main body 1 and the casing 5 are pulled together and are firmly fixed in close contact. That will happen.

As described above, according to the embodiment, when inserting and fixing the casing 5 inside the main body 1, the generation of a gap between the outlet 4 of the main body 1 and the blower lower of the casing 6 requires no special parts. This can be prevented very easily.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the holes in the tongue provided at the outlet of the main body and the holes in the top surface of the main body are provided at the upper and lower parts of the air outlet of the casing. Just by fitting the conical protrusion and fixing the casing to the main body, the gap between the main body's discharge port and the casing's air outlet can be reliably eliminated, and there is no need to attach packing etc. as in the past. Therefore, not only will there be no gaps caused by peeling of the packing or deterioration, but also
The number of parts is reduced, and the number of man-hours required for assembly work is also reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a duct ventilation fan according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a sectional view of a conventional duct ventilation fan, and Fig. 4 is an exploded perspective view of the same. be. 1...Main body, 4...Discharge port, 4a...
...Tongue, 4a, 4a...hole, 5...
...Casing, 5a... Protrusion, 7...
・Air vent. Name of agent: Patent attorney Shigetaka Awano and 1 other person1-
11 eat; 2--lone wolf 3-passive 11--discharge port odor...-8 avoid comb

Claims (1)

[Claims] An electric motor with blades fixed inside the main body is fixed to the top surface of a box-shaped main body that is inserted into an opening in the ceiling surface, and an electric motor with blades fixed inside the main body is attached to the bottom of the discharge port provided on one side of the main body. A hole is formed in the tongue and above the outlet on the top surface of the main body, and a casing inserted into the main body and surrounding the blade is placed in the upper and lower parts of the air outlet. A ventilation fan for a duct, in which a provided conical protrusion is fitted into the hole and fixed to the main body.