JP3114846B2 - Rectifier plate of fan in range hood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood which is installed above a gas cabinet such as a system kitchen to discharge smoke such as steam or oily smoke to the outside. The present invention relates to a flow straightening plate provided at an intake port, which suppresses generation of turbulent flow of smoke exhaust, and realizes smooth suction and exhaust of smoke exhaust by increasing a suction flow rate. .

[0002]

2. Description of the Related Art As a fan installed in a conventional range hood, a sirocco fan, a turbo fan, or the like is used in combination with an exhaust duct when a strong exhaust pressure is required in an apartment house or the like. . And as shown in FIG.
The smoke exhaust port (a) of this type of fan case (d)
It is possible to open the opening as widely as possible by simply mounting a plurality of parts of the ring-shaped metal fitting (b) with the inner rim slightly curved inward on the periphery of the opening with a thumbscrew (c) or the like. Was common.

[0003]

However, when the smoke is sucked by rotating the fan, the suction area is large with respect to the suction amount. There was a risk of stagnation. Also, there is a difference in exhaust suction pressure between the vicinity of the opening edge and the center of the smoke exhaust inlet (a), which tends to cause turbulence and swirl, thereby deteriorating the suction efficiency and generating a backflow of smoke. It was a factor to make it happen.

SUMMARY OF THE INVENTION Accordingly, it is a technical object of the present invention to suppress a decrease in fluid velocity at the time of suction or to prevent the occurrence of turbulence near an opening in such a fan. .

[0005]

According to the present invention, a front plate having a curved outer peripheral edge is extended to a large-diameter end of a guide tube having different diameters at both ends, and a small-diameter end is formed at an outer end. A plurality of fixed legs shorter than the guide tube are erected on the back surface of the front plate, and the fixed legs are mounted facing the suction port of the fan case. By being located inside the sirocco fan,
The present invention has solved the above problem.

In the straightening plate according to the present invention having the above-described structure, the guide tube bisects the inlet of the fan case into the inside and the outside so as to reduce the opening area. It increases and the stagnation of flue gas is suppressed. In addition, since the fixed legs are shortened, the small-diameter end of the guide tube is inserted into the inside of the fan, which is equivalent to the provision of a curve on the periphery of the front plate and the small-diameter end of the guide tube. In addition, the flow path of the flue gas is regulated to prevent turbulence and the like.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The fan rectifier plate of a range hood according to the present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is an overall perspective view of a current plate according to the present invention. In the figure, reference numeral 1 denotes a guide tube which has a substantially funnel shape with different diameters at both ends. And
A ring-shaped front plate 2 is extended to the large-diameter end, and the outer peripheral edge of the front plate 2 is curved 3 downward. On the other hand, the end portion on the small diameter side is slightly curved 4 outward and upward.
Reference numeral 5 denotes a plurality of fixing legs projecting from the lower back surface of the front plate 2, and the length thereof is shorter than the entire length of the guide tube 1, and a fixing screw hole 6 is provided at the tip of the fixing leg 5. Pierced.

The fixing leg 5 is for fixing the current plate of the present invention by using a screw hole provided in the main body of the fan case (C) for mounting the conventional ring-shaped metal fitting. The number and position of the legs can be arbitrarily selected according to the specifications of the fan used for each commercially available range hood.

The straightening plate of the fan in the range hood according to the above-described configuration is configured such that the end on the small diameter side is inserted into the suction port of the sirocco fan 7 and is coaxial with the rotating shaft 8 of the fan as shown in FIG. By mounting, the inlet is divided into two passages inside and outside the guide tube. Accordingly, the area of the passage for smoke and the like is divided and substantially narrowed, so that the flow velocity in each passage is relatively increased, and the smoke and the like can be smoothly sucked and discharged. In addition, the curved edges provided at the outer edge and the small-diameter end of the front plate rectify the smoke emission, and prevent turbulence and swirl.

[0010]

As described above, the rectifying plate of the fan in the range hood according to the present invention suppresses the generation of turbulent flow and swirl of smoke exhaust and increases the flow velocity by substantially reducing the passage area. As a result, it is possible to obtain an efficient suction force, suppress the stagnation of smoke exhaust,
The special effect that discharge can be performed can be expected. In addition, since the fixed legs are replaced with conventional ring-shaped brackets, they can be applied to existing fan cases as they are.
The invention is excellent in economical efficiency and handling, such that various operations such as filter replacement can be performed very easily.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a part of a current plate according to the present invention with a cutout.

FIG. 2 is a side cross-sectional view showing a state where it is attached to a range hood.

FIG. 3 is a side sectional view of a conventional range hood.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide pipe 2 Front plate 3 Curve 4 Curve 5 Fixed leg

Claims (1)

(57) [Claims] 1. A front plate whose outer peripheral edge is curved is extended to the large-diameter end of a guide tube having different diameters at both ends, and the small-diameter end is slightly curved outward. A plurality of fixed legs shorter than the guide tube are erected on the back surface of the face plate, and the fixed legs are attached to the suction port of the fan case so that the small-diameter end is located inside the sirocco fan. A rectifier plate for a fan in a range hood, characterized in that: