JPH023061Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of so-called drip-proof ventilation hoods that are attached to ventilation openings on external walls to prevent wind and rain from entering. A support plate is provided.

Figures 1 and 2 show a conventional ventilation hood disassembled. In the figures, 1 is a hood body with an opening 1a at its lower end, and 2 is a series of protruding holes on the rear opening edge of the hood body. Connection pipe of duct 6, 3
is a support plate for connecting the ventilation duct that is stretched over the center of the connecting tube and has a screw insertion hole 3a in the center, and its mounting direction is relative to the flow direction of the wind flowing inside the connecting tube 2. mounted in parallel. 4 is a band-shaped spring plate having a screw hole 4a in the center and both ends are locked to the inner wall surface of the ventilation duct 6; 5 is inserted into the screw insertion hole 3a of the support plate 3, and the tip is connected to the spring plate; 4 into the ventilation duct 6 whose tip is inserted into the ventilation hole 8 of the outer wall 7 by tightening the screw.
It serves to fix the connecting tube 2 in the state shown in FIG. 2 via the spring plate 4.

In summary, in the conventional system, the support plate 3 stretched within the connecting tube 2 is attached parallel to the exhaust flow, so the pressure loss is small, but that is the only difference.

This invention focuses on this point and is characterized in that the support plate has a guiding function for the exhaust flow. That is, as shown in FIGS. 3 and 4, the support plate 3 in this invention has, in addition to a screw insertion hole 3a provided in the center thereof,
A series of guide vanes 3b are formed at the leading end of the guide vane 3b, which extend along the inner wall surface of the hood main body 1 in a stretched state and guide the internal exhaust flow to the lower end opening 1a of the hood main body 1. The present invention is characterized by this point, and the other configurations are similar to the above-mentioned conventional one. In addition, when cleaning the support plate 3, etc., it is sufficient to remove the screw 9, remove the hood body 1, disconnect the tightening screw 5 from the spring plate 4, and take out the support plate 3 together with the connecting tube 2.

Since the ventilation hood of this invention is constructed as described above, not only can the hood body and the ventilation duct be connected reliably, but these connection support plates can also be used as rectifying plates for the exhaust flow passing through the hood body. It has the advantage of being able to

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the disassembled state of a conventional ventilation hood, Fig. 2 is a vertical sectional view showing the installed state of the conventional ventilation hood, and Fig. 3 is an interior support plate of an embodiment of the ventilation hood of this invention. FIG. 4 is a perspective view showing the spring plate, and FIG. 4 is a vertical sectional view showing the installation state of the ventilation hood of this invention. Note that the same reference numerals in the drawings indicate the same or equivalent parts, and in the drawings, 1 is the hood main body, 1a is the lower end opening, 2 is the connecting tube of the ventilation duct 6, 3 is the support plate, 3b is the guide wing piece at the tip, 4 7 is a spring plate, 7 is an outer wall, and 8 is a ventilation hole.

Claims (1)

[Scope of utility model registration request] A hood body 1 having an opening 1a at the lower end, a connecting tube 2 that protrudes in series from the rear opening edge of the hood body 1 and is inserted into a ventilation hole 8 in an outer wall 7, etc.; In the drip-proof ventilation hood, the support plate 3 is fixed in a tensioned state and is connected with a screw to a spring plate fixed in a ventilation duct 6 whose tip is inserted into the ventilation hole 8. A drip-proof ventilation hood characterized in that a series of guide vanes 3b are formed at the tip of the plate 3 to extend along the inner wall surface of the hood body 1 and guide the internal exhaust flow to the lower end opening 1a.