JPH1047723A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid concentration of suction force at a suction hole in a fan casing of a range hood to the center of the fan case by facing an upper opening in a rectification plate provided on a filter in close vicinity at a lower edge thereof to the filter slantingly provided along a partition plate lower end edge to an upper edge opening in the partition plate. SOLUTION: A partition plate 3 is adapted such that each end edge of a lower partition 3d extending laterally is brought into contact with an inner wall surface of a hood frame 1 including a front hood 1a and an inner wall lower part of the hood frame 1 is left behind. The rectification plate 4 sets an upper opening 4c opened upward facing to a suction hole 2a in a fan case 2, and a lower peripheral edge of an upper rectification part 4a having the upper opening 4c is communicated with a lower rectification part 4b exhibiting a rectangle viewed in a flat plane and a lower edge 4d of the rectification part is disposed in the vicinity of an upper surface of a filter 5 slantingly provided out the partition plate 3. Hereby, concentration of suction force at the suction hole 2a in the fan case 2 of the range hood to the center part is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening plate for a resin hood with a built-in fan installed above a gas cabinet such as a system kitchen, and more particularly, to steam or oil smoke generated from the gas cabinet during cooking or the like. (Hereinafter referred to as "smoke emission") to provide a range hood capable of efficiently discharging the smoke.

[0002]

2. Description of the Related Art Conventionally, in a housing complex or other range hood requiring a high exhaust pressure, a duct for discharging smoke exhausted during cooking or the like to the outside, and a sirocco fan or a turbo fan in the system. 2. Description of the Related Art A range hood having a structure for forcibly sucking and discharging flue gas by using such a device is widely known.

Although the structure and form of this type of range hood are not uniform due to the layout of cabinets in the kitchen room, etc., as shown in [A] in FIG. Vertical range hood (tentative name) where the smoke exhaust direction (indicated by the arrow) by the fan (b) is upward
And a horizontal range hood (tentative name) in which the smoke exhaust direction (indicated by an arrow) is substantially horizontal as shown in FIG.
The structure of each hood frame (a) or current plate (c) was diverse. In the figure, (d) is a discharge duct, (e) is a motor for driving a fan,
(F) indicates a filter.

The inventor of the present invention has provided a straightening plate of the above-mentioned horizontal range hood, in which a front plate having a curved outer peripheral edge is provided at a large diameter end of an induction tube having different diameters at both ends, and a small diameter end is provided. The part is slightly bent outward, and the fixed leg shorter than the length of the guide tube is installed facing the suction port of the fan case, and the small-diameter side end is attached to the sirocco fan. So that the turbulence and eddy currents of flue gas seen in conventional horizontal range hoods are suppressed, and at the same time, the suction flow rate is increased to obtain efficient suction power. The above technology was developed and a patent application was filed (Japanese Patent Application No. 7-303536).

[0005]

SUMMARY OF THE INVENTION The present invention relates to the above two types of range hoods, particularly to a vertical range hood.
Although there is an advantage that the upward flow of smoke exhaust can be used to the maximum, if the suction port of the fan case is made as large as possible to increase the suction amount, the suction force concentrates in the center and There was a common problem that the amount of suction of the gas decreased.

[0006]

Therefore, the present inventor needs to prevent the suction force at the suction port of the fan case of the vertical range hood from being concentrated at the center portion, and to further enhance the suction force at the peripheral portion. The present invention has solved the above-mentioned conventional technical problem by paying attention to the characteristics.

That is, an upper partition having an upper edge opening provided with a bell mouth inscribed in a suction port at the center of the lower surface of a fan case in a vertical range hood, and extending downward from a peripheral edge of the upper partition. A partition plate formed by integrally linking a middle partition to be formed and a lower partition connected to the lower end edge of the middle partition and extending in the horizontal direction is fixed, and is removable between opposed lower end edges of the middle partition. A rectifying plate having a truncated conical upper rectifying portion having an opening at an upper portion thereof, and a lower rectifying portion having a rectangular shape in a plan view and connected to a lower edge of the upper rectifying portion. A means is used in which the lower edge is brought close to and the upper opening is provided facing the center of the upper edge opening of the partition plate.

[0008] Also, the upper opening area of the current plate is S 'and the opening area of the lower edge is S, and the effective passage area of smoke exhaust formed between the peripheral surface of the upper opening of the current plate and the upper edge opening of the partition plate. To s',
Assuming that the effective passage area between the lower edge of the current plate and the lower edge of the partition plate is s, both of them have a relationship of S / S '> s / s'.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The range hood of the present invention having the above-mentioned structure will be described in more detail based on one embodiment shown in FIGS. 1 and 2. In FIG. A hood frame 2 whose entire lower surface is open is a fan case 2 fixed to an upper portion of the hood frame 1,
A motor (M) is provided on its upper surface, and a suction port 2a concentric with, for example, a sirocco fan (F) connected to a drive shaft of the motor (M) is provided on the lower surface thereof and connected to a drive shaft of the motor (M). One side is provided with a discharge port 2b which leads to a smoke discharge duct (D).

Reference numeral 3 denotes a partition plate, and an upper partition 3b having an upper edge opening 3a formed by bending a bell mouth projecting inward from the periphery of the suction port 2a of the fan case 2, and an upper partition 3b. Partition 3 extending downward from the periphery
c, and a lower partition 3d extending in the lateral direction from the lower end edge thereof, and each edge of the lower partition 3d extending in the lateral direction comes into contact with the inner wall surface of the hood frame 1 including the front hood 1a and the hood is formed. The lower part 1b of the inner wall of the frame 1 is partitioned so as to remain, and a filter 5 ascending forward is detachably mounted on the lower edge of the middle partition 3c so as to be detachable.

Further, reference numeral 4 denotes a straightening plate having an upper opening 4c which is opened immediately below the center of the fan, that is, upwardly facing the suction port 2a of the fan case, and has a frusto-conical shape having the upper opening 4c. A lower peripheral edge of the upper rectifying portion 4a is communicated with a lower rectifying portion 4b having a rectangular shape in a plan view, and the lower edge 4d is positioned close to the upper surface of the filter 5 obliquely provided on the partition plate 3. Things.

In FIG. 1, reference numeral 6 denotes a mounting bracket for the front hood 1a constituting the hood frame 1, reference numeral 7 denotes an illumination section provided with a reflection plate 7a, and reference numeral 8 denotes a switch cover having a built-in switch.

In the range hood of the present invention having the above-described configuration, the bell mouth 3a is used as the opening of the upper edge of the partition plate 3, so that the swirl of smoke exhaust passing through this portion is suppressed, and the generation of noise is greatly reduced. In addition, in the smoke exhaust space separated by the partition plate 3 and the rectifying plate 4, the upper opening area of the rectifying plate 4 is S ', and the opening of the lower edge thereof is While the area is S, the effective suction area of smoke exhaust formed between the upper opening peripheral surface of the current plate 4 and the upper edge opening of the partition plate 3 is s ′, and the lower edge of the current plate 4 is partitioned from the lower edge. When the effective suction area with the lower edge of the plate 3 is s, the relationship between the two is always S / S '> s / s' to avoid the phenomenon that the suction force of the fan is concentrated at the center. It was done.

In the embodiment shown in FIGS. 1 and 2, the middle partition 3c of the partition plate 3 and the lower rectifying portion 4b of the rectifying plate 4 are provided.
However, although a complicated shape composed of an inclined wall is exemplified, as long as the relationship of S / S '> s / s' described above is maintained, the partition 3c and the lower rectifying portion 4b are particularly preferable.
It is not necessary to limit the form as illustrated.

As described above, the main reason why the present invention does not concentrate the suction force of the fan on the center of the range hood is as follows.
Since the burner does not exist in the central part of the stove base, many smoke exhausted from the respective burner positions and diffused while being guided by the lower inner wall 1b around the hood frame, This is because the filter 5 is rationally sucked and processed from a wide range.

[0016]

As described above in detail, according to the range hood of the present invention, even if the smoke exhaust suction range of the vertical range hood is particularly widened, the smoke exhaust can be performed by the conventional range hood. Without being concentrated in the central straightening plate as described above, there is a remarkable effect that the smoke exhaust efficiency in the peripheral portion of the straightening plate can be maintained higher, effective suction can be performed, and rapid exhaust can be performed. Is what is done.

Further, the communication edge between the upper edge opening of the upper partition and the suction port of the fan case is formed as a bell mouth, so that turbulence and swirl are not generated in the smoke exhaust passing through this portion. It has many remarkable advantages over the conventional one, such as being able to suck smoothly and greatly reduce the generation of noise.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a range hood according to the present invention.

FIG. 2 is a bottom view of the range hood.

3A is a cross-sectional view schematically illustrating a vertical range hood, and FIG. 3B is a cross-sectional view schematically illustrating a horizontal range hood.

[Explanation of symbols]

 Reference Signs List 1 hood frame 1a front hood 1b lower inner wall 2 fan case 2a suction port 2b outlet 3 partition plate 3a upper edge opening 3b upper partition 3c middle partition 3d lower partition 4 rectifying plate 4a upper rectifying unit 4b lower rectifying unit 4c upper opening 5 Filter 6 Hood mounting bracket 7 Lighting section 8 Switch cover

Claims (2)

[Claims] 1. A vertical range hood in which a fan case, one side of which is connected to a discharge duct, is fixed to an upper portion of a hood frame whose lower end is open, and a filter is provided at a lower end thereof.
The upper edge opening of the partition plate with the bell mouth is fixed to the suction port at the center of the lower surface of the fan case in an inscribed manner, and the lower edge is close to the filter that is obliquely provided along the lower edge of the partition plate. A range hood characterized in that an upper opening of a rectifying plate is provided facing an upper edge opening of the partition plate. 2. The effective passage area of smoke exhaust formed between the peripheral surface of the upper opening of the rectifying plate and the upper edge opening of the partition plate, where S 'is the upper opening area of the rectifying plate and S is the opening area of the lower edge. Is s ′, and the effective passage area between the lower edge of the current plate and the lower edge of the partition plate is s,
The range hood according to claim 1, wherein both are in a relationship of S / S '> s / s'.