JP2010151431A - Exhaust device and exhaust system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly adjust the airflow on an air inlet face in an exhaust device disposed in the place where a work is executed under poisonous gas atmosphere. <P>SOLUTION: This local exhaust device disposed in the place where the work is executed under the poisonous gas atmosphere, is provided with: a housing section 10 formed of a box body having an opening 10a on its front face; an exhaust port formed of a through hole provided on a surface of the housing section 10; and a plurality of fans 21 disposed in a state of closing the opening of the front face of the housing section 10 and performing suctioning. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an exhaust device and an exhaust system for exhausting air so that an operator is not exposed to toxic gas in a work place where toxic gas may be generated, such as an autopsy table, an operating table, and an examination table.

When performing work that generates toxic gas such as dissection using formalin, work in a closed work space such as a draft chamber or air flow between a push hood and a pull hood as in the invention described in Patent Document 1 below. It is common to form a curtain and work inside this.
The exhaust device used in such a device has a structure in which a sirocco fan, a turbo fan, or the like for exhaust is connected to the middle or base end of a duct connected to the hood and the hood serving as an intake port. .
JP 2005-133964 A

In the exhaust device having such a structure, the airflow sucked from the hood tends to be weak at the center, and the suction efficiency is poor. Also, the airflow taken in with respect to the intake surface is constant in direction, strength, etc., and it is difficult to adjust this.
In view of such a problem, an object of the present invention is to make it possible to appropriately adjust the airflow on the intake surface as an exhaust device installed at a place where work is performed in a toxic gas atmosphere.

In order to solve the above problems, the present invention has the following configuration.
The invention according to claim 1 is a local exhaust device installed at a place where the work is performed in a toxic gas atmosphere, and is provided on a housing portion formed of a box having an opening on the front surface, and on the surface of the housing portion The exhaust device includes an exhaust port formed of a through-hole and a plurality of fans that perform suction so as to close the opening on the front surface of the casing. The toxic gas includes not only a gas harmful to the human body but also a gas containing a liquid, a solid, and a harmful microorganism harmful to the human body.
According to a second aspect of the present invention, in the exhaust device, the opening of the casing portion is rectangular, and the plurality of fans are arranged in a matrix in a vertical direction of 2 or more and in a horizontal direction of 2 or more. It is.
According to a third aspect of the present invention, in the exhaust apparatus, at least one of the plurality of fans has a suction surface direction different from that of the other fans.
According to a fourth aspect of the present invention, in the exhaust device according to the third aspect, the plurality of fans are arranged in at least two rows vertically, and the fans arranged in at least one row are arranged in other rows. The fan is fixed at different angles around the horizontal axis along the column direction.
According to a fifth aspect of the present invention, in the exhaust device, at least one of the plurality of fans is formed so that a direction of a suction surface can be adjusted.
According to a sixth aspect of the present invention, in the exhaust system according to the fifth aspect, the plurality of fans are arranged in at least two rows in the vertical direction, and the fans arranged in at least one row are horizontal along the row direction. The rotation position around the axis can be adjusted.

The invention described in claim 7 is an exhaust system including the exhaust device and a blower that blows air toward the exhaust device.
According to an eighth aspect of the present invention, in the exhaust system, the blower device includes two or more blowers having different blowing directions.
According to a ninth aspect of the present invention, in the exhaust system, the exhaust pipe is connected to an exhaust pipe communicating with outside air, and suction is performed in the middle of the exhaust pipe or at an end position communicating with the outside air. A fan is provided.

According to the first aspect of the present invention, a suction force can be applied over the entire suction surface of the exhaust device by closing the opening on the front surface of the exhaust device with a plurality of fans, and the angle and air volume of each fan can be changed. The airflow at the suction surface can be adjusted as appropriate.
According to the second aspect of the present invention, the suction amount can be increased and the air volume at each position of the suction surface can be appropriately adjusted by covering the opening as a surface with a plurality of fans arranged vertically and horizontally.
According to the third aspect of the present invention, it is possible to increase the suction efficiency, in which the angles of the plurality of fans are not uniform and are appropriately different depending on the use situation.
According to the fourth aspect of the present invention, the angle around the horizontal axis of the multiple rows of fans arranged in the vertical direction is made different, and in particular, it corresponds to the exhaust of gases having different specific gravity with respect to the air flowing so as to rise or fall. be able to.
According to the fifth aspect of the present invention, when the environmental temperature or the corresponding toxic gas is changed, the angle of the fan is appropriately changed according to the changing situation, so that it can flexibly cope with the change.
According to the sixth aspect of the present invention, the angle of the suction surface can be adjusted flexibly in accordance with gases having different specific gravities and temperature conditions.

According to the seventh aspect of the present invention, an air flow directed toward the exhaust device is generated between the exhaust device and the exhaust device by providing the exhaust device with a blower that blows air toward the exhaust device. And a wider range of exhaust can be realized.
According to the eighth aspect of the present invention, it is possible to perform flexible blowing according to the situation by configuring the blowing device from two or more blowers having different blowing directions.
According to the ninth aspect of the present invention, the suction force of the exhaust device can be improved by providing the exhaust fan with the second fan and setting the inside of the housing to a negative pressure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the exhaust device X according to the present embodiment, FIG. 2 is an exploded perspective view of the exhaust device X, and FIG. 3 is a cross-sectional view of the exhaust device X along AA. The exhaust device X includes a housing 10, a suction fan unit 20, and an exhaust duct 30.
The housing 10 is a box body that is formed with an opening 10a having a front surface that is made of stainless steel, and that has an exhaust port provided at an upper portion thereof. An attachment hole, a screw hole, and the like are provided at predetermined positions. In addition, a power supply device and a control device (not shown) are provided inside the housing 10, and an operation panel 22 for adjusting an operation switch of the fan motor 21 described later and an air volume is provided on the front surface. A mesh-like front panel 11 is detachably provided in the front opening of the housing 10. The exhaust duct 30 is constituted by a stainless steel tube connected to an exhaust port which is an opening provided in the upper portion of the housing 10, and the base end side is connected to communicate with the outdoors. The front panel 11 may be provided with a filter that adsorbs toxic substances contained in the assumed toxic gas.

  The suction fan unit 20 includes a plurality of fan motors 21 that serve as suction fans and an angle 22 that fixes the fan motor 21. The electric wires of each fan motor 22 are connected to a power supply unit (not shown). Each fan motor 21 is coated with glass to prevent corrosion due to toxic gas. The angle 22 is formed by bending both ends of a horizontally long plate body in which a hole for exposing the fan portion of the fan motor 21 is formed, and an attachment hole is appropriately provided. Here, five fan motors 21 are fixed to the angle 22 by bolts and nuts, and three angles 22 are provided, so that a total of 15 fan motors 21 can be arranged in a matrix form vertically and horizontally. Will be placed. Each angle 22 is fixed by a bolt to a screw hole (not shown) provided in the side wall of the housing 10 through an attachment hole provided in a portion bent forward. Since this mounting hole is one in the bent part, the angle 22 can be fixed at an arbitrary rotational position with respect to the horizontal axis. That is, the one row of fan motors 22 fixed to one angle 22 is formed so that the suction surface can be adjusted to an arbitrary angle about the horizontal axis along the row direction.

  Next, a method of using the exhaust device X having the above-described configuration and operation will be described. The exhaust device X is installed in a work place where toxic gas is generated. When installing, as shown in FIG. 2, when viewed from the operator P, it is disposed at a front position of the substance M or the like that generates toxic gas. Thereby, toxic gas will be attracted | sucked to the position away from an operator. Then, the angle 22 is adjusted in accordance with the position of the substance M that generates toxic gas and the exhaust device X so that the suction efficiency is increased. For example, as shown in FIG. 2, when mounting on the work table, the fan motor 21 fixed to the lowermost angle is directed substantially in the horizontal direction, so that the suction surface is substantially directed to the substance M, and the second stage. The suction surface of the third stage fan motor 21 can be directed toward the substance M by adjusting the angle slightly below the horizontal direction. In some cases, the suction surface may be directed at an angle slightly shifted from the source of toxic gas depending on the weight of the gas. In the exhaust device X, since the fan motor 21 is arranged over the entire suction surface by the opening of the housing 10, suction is possible over the entire opening surface, and the suction efficiency is good. Further, the suction efficiency can be further increased by adjusting the angle of the suction surface of the fan motor in each row.

Note that the above-described method of use provides a very high effect when the distance between the toxic substance source and the exhaust device X is short, but the distance between the toxic substance source and the exhaust device X must be provided. If not, it is desirable to provide a blower or a second suction fan. FIG. 3 is a plan view of the exhaust system Z having such a configuration.
The exhaust system Z includes an exhaust device X, a blower device Za, and a second fan Zb. Here, the blower Za is composed of three general blowers 40 including a propeller fan and a motor. The blower 40 is installed so as to send the air blown toward the exhaust device X from behind the worker. Among these blowers, two of the blowers located at positions shifted from directly behind the worker P are provided with a distance from the width of the exhaust device X, and face the exhaust device X so that the positions of the worker and the exhaust device X are determined. Air is blown obliquely to the connecting line segment. Moreover, regarding the air blower located just behind the worker P, the air is blown down from a position slightly higher than the overhead of the worker. Thereby, it is possible to generate an air flow toward the exhaust device X so as to wrap the generation source of the toxic substance from the surroundings. The second fan Zb is a general suction fan provided in the middle of the exhaust duct 30. By providing the second fan Zb, the inside of the housing 10 can always be set to a negative pressure, and the load applied to the fan motor 21 can be reduced to improve the suction force. In the suction system Z, the blower Zb and the second fan Zb may be omitted as necessary.

In the above embodiment, the number of fans of the exhaust device X is 15 in total, 5 in the horizontal direction and 3 in the vertical direction, but this number can be arbitrarily set, and depending on the shape of the opening of the housing 10 There may be cases where they are not arranged in a matrix.
Further, in the exhaust device X, the rotation angle of the horizontal row of fans can be adjusted. However, the rotation angle of the vertical row of fans may be adjusted, and the rotation angle of each fan may be uniaxial or orthogonal. It may be adjustable with respect to the two axes. When the exhaust device X is installed and fixed under constant use conditions, the rotation angle of the fan may be completely fixed at an optimum angle.
Further, the suction force of the fans can be made variable for each row, or the suction force can be made variable for each fan. In addition to the fan motor, a fan other than the propeller fan can also be used as the fan placed in the exhaust device X, such as a small sirocco fan.

It is a perspective view of the exhaust apparatus which concerns on embodiment. It is a disassembled perspective view of the exhaust apparatus which concerns on embodiment. It is a longitudinal cross-sectional view of the exhaust apparatus which concerns on embodiment. It is a top view which shows the exhaust system which concerns on embodiment.

Explanation of symbols

X Exhaust device Z Exhaust system Za Blower device Zb Second fan 10 Housing 11 Front panel 20 Suction fan unit 21 Fan motor 22 Angle 30 Exhaust duct

Claims (9)

A local exhaust device installed at a place where work is performed in a toxic gas atmosphere,
A housing portion formed of a box body provided with an opening on the front surface;
An exhaust port composed of a through hole provided on the surface of the housing part;
An exhaust system comprising a plurality of fans that perform suction and are arranged so as to close an opening on a front surface of the casing. The opening on the front surface of the casing is rectangular,
The exhaust system according to claim 1, wherein the plurality of fans are arranged in a matrix in the form of two or more in the vertical direction and two or more in the horizontal direction.   The exhaust device according to claim 1 or 2, wherein at least one of the plurality of fans has a suction surface direction different from that of the other fans.   The plurality of fans are arranged in at least two rows above and below, and the fans arranged in at least one row are fixed at different angles around the horizontal axis along the row direction with respect to the fans arranged in other rows. The exhaust device according to claim 3, wherein   The exhaust device according to any one of claims 1 to 4, wherein at least one of the plurality of fans is formed to be capable of adjusting a direction of a suction surface.   6. The plurality of fans are arranged in at least two rows in the vertical direction, and the fans arranged in at least one row are formed so as to be capable of adjusting a rotational position around a horizontal axis along the row direction. Exhaust system.   An exhaust system comprising the exhaust device according to any one of claims 1 to 6 and a blower that blows air toward the exhaust device.   The exhaust system according to claim 7, wherein the blower device includes two or more blowers having different blow directions.   The exhaust system according to claim 7 or 8, wherein an exhaust pipe that communicates with outside air is connected to the exhaust port, and a second fan that performs suction is provided in the middle of the exhaust pipe or at an end position that communicates with outside air. .

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