JPH071147A - Fluid sucking nozzle - Google Patents

Abstract

PURPOSE:To easily adjust the ratio of a fluid intake of a fluid sucking nozzle to a fluid discharge by arranging an axial intake fan in an intake path and disposing in a discharge path discharging blades whose angle is freely adjustable for attaching to the outer circumferential edge of the intake blades of the intake fan. CONSTITUTION:When an intake fan 10 is driven, the air that is taken in a discharge path 4 through a bell-mouth 7 is energized by discharge blades 19 and discharged obliquely downward into a chamber as a film-like air stream from a discharge port 32; as a result, the local space is limited which is enclosed by this film-like air stream. The air containing contaminants in the local space is sucked into a sucking path 3 from an intake port 33 through a grill 16 and a filter 15, energized by an intake blade 14, dischaged from an exhaust port 34, sent to an air purifier through a duct and purified. By changing the attaching angle of the discharge blades 19 by means of a variable pitch mechanism, the ratio of the intake air volume to the discharge air volume is easily changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid suction nozzle suitable for suppressing the diffusion of contaminants such as welding foam and harmful gas.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional fluid suction nozzle. As shown in FIG. 2B, 25 is a fluid suction nozzle, which is connected to an air cleaner 27 via a duct 26. The fluid suction nozzle 25 includes a suction passage 23 and an annular discharge passage 24 formed around the suction passage 23.

However, when the fan 27d built in the air purifier 27 is driven, the indoor air sucked from the suction port 27e is urged by the fan 27d, and the outside flow passage 21 of the duct 26 is urged.
Through the annular discharge passage 24 of the fluid suction nozzle 25 and is discharged obliquely downward into the chamber 29.

Local space AZ surrounded by this air flow AC
The air inside is sucked into the suction passage 23 of the fluid suction nozzle 25, enters the air purifier 27 through the inner passage 20 of the duct 26, and passes through the filter 27a, the dust collecting material 27b, and the deodorizing material 27c. Purified in the process. And it is sucked into Juan 27d again and the above is repeated.

[0005]

[Problems to be Solved by the Invention] This kind of fluid suction nozzle
The amount of pollutants sucked into the air cleaner 27 from 25 is determined by the ratio of the air suction amount Qs and the air discharge amount Qd of the fluid suction nozzle 25, and this ratio also varies depending on the pollutants.

Conventionally, the air discharge amount Qd has been increased or decreased by adjusting the rotational speed of the fan 27d of the air purifier 27 or the opening degree of a discharge valve (not shown). However, it is difficult to obtain a predetermined Qs / Qd. At the same time, the device becomes complicated and expensive, so that it has not been put into practical use.

[0007]

The present invention has been invented in order to solve the above-mentioned problems, and its gist is to form an intake passage for inhaling a fluid and a periphery of the intake passage. Equipped with an annular discharge passage for discharging fluid
In a fluid suction nozzle for sucking fluid in a local space surrounded by fluid discharged from the discharge passage from the suction passage, an axial flow type suction fan is arranged in the suction passage and suction of the suction fan is performed. A fluid suction nozzle is characterized in that a discharge vane, which is attached to the outer peripheral end of the vane so that the mounting angle can be adjusted, is arranged in the discharge passage.

[0008]

In the present invention, since it has the above-mentioned structure, the suction fan drives the suction fan to suck the fluid containing the contaminants in the local space into the suction passage, and at the same time, the discharge blade urges the fluid. And discharge from the discharge path. Then, by adjusting the mounting angle of the discharge blade, the fluid suction amount Qs and the fluid discharge amount Q of the fluid suction nozzle are adjusted.
Change the ratio to d.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG. 1, where (A) is a vertical sectional view of a fluid suction nozzle, (B) is a sectional view taken along the line BB of (A), and (C) is It is an arrow line view which follows the C arrow of (B).

The fluid suction nozzle 100 is provided with a suction pipe 1 and a discharge pipe 2 which is disposed around the suction pipe 1 and is concentric with the suction pipe 1, and a suction passage 3 is formed inside the suction pipe 1. An annular discharge passage 4 is formed between the suction pipe 1 and the discharge pipe 2.

An umbrella-shaped suction expansion pipe 5 is provided at the lower end of the suction pipe 1, and an umbrella-shaped discharge expansion pipe 6 is also provided at the lower end of the discharge pipe 2. A bell mouth 7 is detachably attached to the upper end of the discharge pipe 2 with a bolt nut 8.

An axial flow type suction fan 10 is provided in the suction passage 3, and a filter 15 and a suction grill 16 are arranged upstream of the suction fan 10. An electric motor 11 of the suction fan 10 is fixed to the suction pipe 1 via a stay 12, and a plurality of suction impellers 14 are attached to an impeller boss 13 which is directly connected to a rotating shaft of the electric motor 11.

A connecting rod 17 extending outward from the outer peripheral end of each suction blade 9 penetrates a slit 18 formed in the suction pipe 1 and extends into the discharge passage 4, and a discharge blade 19 is not shown at the tip thereof. It is mounted in the discharge path 4 by a known variable pitch mechanism so that the mounting angle can be adjusted. Reference numeral 31 is a stay that connects the suction pipe 1 and the discharge pipe 2.

However, when the suction fan 10 is driven, the air sucked into the discharge passage 4 through the bell mouth 7 is urged by the discharge vanes 19 to form a film-like air flow from the discharge port 32. The local space, which is discharged downward into the room and is surrounded by this film-like airflow, is limited.

The air containing pollutants in the local space is the inlet
33 is sucked into the suction passage 3 through the grill 16 and the filter 15, is urged by the suction blades 14 and is discharged from the exhaust port 34,
It is sent to an air purifier through a duct (not shown) for purification.

Discharge blade 19 according to pollutants in the local space
If the mounting angle of is changed by the variable pitch mechanism, the ratio between the intake air amount Qs and the discharge air amount Qd can be easily changed. Also, if the mounting angle of the suction vane 14 is adjustable, Qs / Q
The ratio with d can be changed more easily.

[0017]

According to the present invention, an axial flow type suction fan is arranged in the suction passage, and a discharge vane is attached to the outer peripheral end of the suction blade of the suction fan so that the mounting angle can be adjusted. Therefore, it is possible to easily adjust the ratio between the fluid suction amount Qs of the fluid suction nozzle and the fluid discharge amount Qd by adjusting the mounting angle of the discharge vanes.
Pollutants can be effectively sucked in and purified. Further, the structure is simple, the size is small, and the manufacturing cost is low.

[Brief description of drawings]

1 shows an embodiment of the present invention, (A) is a vertical sectional view of a fluid suction nozzle, (B) is a sectional view taken along the line BB of (A),
(C) is a view taken along the arrow C of (B).

2A and 2B show an example of a conventional fluid suction nozzle, FIG. 2A is an operation explanatory view, and FIG. 2B is a configuration diagram of a fluid processing apparatus using the fluid suction nozzle.

[Explanation of symbols]

 3 Suction path 4 Discharge path 10 Suction fan 14 Suction blade 19 Discharge blade

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshifumi Matsumoto, 5-1,717 Fukahori-cho, Nagasaki-shi 1 Nagabishi Engineering Co., Ltd. (72) Inventor Nobuo Suzuki 5-717, 1 Fukahori-cho, Nagasaki-shi Nagahishi-en Inside Genialing Co., Ltd.

Claims (1)

[Claims] 1. A local space surrounded by a fluid discharged from the discharge passage, the suction passage having a suction passage and a ring-shaped discharge passage formed around the suction passage for discharging a fluid. In a fluid suction nozzle for sucking the fluid from the suction passage, an axial-flow suction fan is disposed in the suction passage, and a discharge blade is attached to an outer peripheral end of a suction blade of the suction fan with a mounting angle adjustable. Is disposed in the discharge passage.