JPH0118991Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a ceiling-embedded ventilation fan that is installed in a ceiling ventilation hole to simultaneously provide ventilation and lighting for a narrow room such as an elevator car. In particular, for ventilation, a differential user air path using a propeller fan is adopted, and a lighting fixture is also installed on the bottom surface of the second air path member at the bottom, which constitutes one half of this air path. An embodiment of the ventilation fan of this invention will be described below.

That is, in the figure, 1 is a ceiling wall of an elevator car, etc., 1a is a ventilation hole provided in this ceiling wall, 2 is a propeller fan provided in a hanging state within this ventilation hole, and 3 is a drive motor attached to the lower end of this fan. , 4 is a mounting leg of this motor, and 5 is a central cylindrical suction duct portion 5a that connects to the propeller fan 2.
A first air passage member 5b is inserted into the ventilation hole 1a so as to surround the suction duct part 5.
a second bell mouth portion formed at the upper end of 5c;
is a first bell mouth portion similarly formed at the lower end, which is provided with a series of annular plates 5d that abut the lower surface of the ceiling wall 1 and extend in the horizontal direction;
It forms one half of the centrifugal differential user air path described later. 6 is a spacer 7 attached to the first air passage member 5.
A second air passage member is disposed oppositely at a predetermined interval between the peripheral edge 6a and the annular plate 5d, and the discharge port 8a of the centrifugal differential user air passage 8 by the propeller fan 2 is fully connected between the peripheral edge 6a and the annular plate 5d. It is formed around the circumference. Reference numeral 9 denotes a chevron-shaped concave portion extruded at the center of the lower surface of the second air passage member 6 so as to be located directly below the axis of the propeller fan 2; 10 denotes this concave portion 9;
A lighting component 11 housed inside is a lighting fixture having this component, and is attached to the center of the lower surface of the second air passage member 6 in an overlapping state so as to cover the recessed portion 9.

The figure shows the ventilation state in, for example, an elevator car due to the rotation of the propeller fan 2 mentioned above.
In this state, the air sucked through the second bell mouth part 5b and the first bell mouth part 5a passes through the centrifugal differential user air passage 8 as shown by the solid line arrow in the figure, and is supplied into the room from its discharge port 8a. At the same time, the interior of the room is illuminated by lighting the lighting fixture 11. Furthermore, during this ventilation, the rear inclined surface 9a of the chevron-shaped recess 9 also acts to rectify the ventilation flow passing through the centrifugal differential user air passage 8. This is something to look forward to.

Since the in-ceiling ventilation fan of this invention is configured as described above, the propeller fan and its drive motor are located in the ceiling, and the protruding height of the second air passage member under the ceiling wall is suppressed. Not only can the lighting equipment installed in this second air passage member provide indoor illumination and indoor ventilation at the same time, but also the use of a centrifugal differential user air passage using a propeller fan allows for low-noise operation. It has the advantage that a sufficient amount of ventilation air can be obtained, and furthermore, a rectifying effect on the ventilation flow can be expected due to the component storage recess provided in the second air path member.

In addition, in the above embodiment, the ventilation fan of the present invention is installed in an elevator car, but the present invention is not limited to this, and is particularly suitable for use in a narrow room with a low ceiling.

[Brief explanation of the drawing]

The figure is a vertical sectional view showing how the ventilation fan of the present invention is installed and used. In the figure, 1 is a ceiling wall, 1a is a ventilation hole thereof, 2 is a propeller fan, 5 is a first air passage member, 5a is a cylindrical suction duct, 6 is a second air passage member, and 8
9 is the centrifugal diff user air path, 9 is the chevron-shaped recess, 1
0 indicates a lighting component, and 11 indicates a lighting fixture.

Claims (1)

[Scope of utility model registration request] a first air passage member fixed in contact with the lower surface of the ceiling wall so as to surround a propeller fan provided in a hanging state in a ventilation hole in the ceiling wall with a cylindrical suction duct portion thereof having a bell mouth; A second air passage member is provided facing each other at a predetermined interval to form a differential user air passage by the propeller fan, and a chevron for storing lighting components is provided at the center of the lower surface of the second air passage member. A ceiling-embedded ventilation fan characterized by an extruded recessed part and a lighting fixture attached to the front of the recessed part.