JP3210794U - Exhaust system - Google Patents

Abstract

Provided is a ventilating device capable of avoiding leakage of harmful gas into a room where a processing space is installed with high exhaust efficiency even with a ventilation system having a relatively low capacity. An exhaust space including an opening of a processing space, a curtain outlet for generating a curtain air flow that blocks the entire opening, and an exhaust space that is blocked by the curtain air flow are orthogonal to the curtain air flow. An air supply port 3 directed in the direction and an exhaust port facing the air supply port 3 arranged with an opening in the exhaust space are provided. [Selection] Figure 2

Description

  The present invention relates to an exhaust device that is installed in various processing spaces such as a cleaning tank and configured to perform efficient exhaust with low energy consumption without leaking an atmosphere from the processing space.

Today, various kinds of work are performed indoors, and depending on the nature of the work, gas harmful to humans may be used or generated.
Leakage of such harmful gases indoors can cause bad odors and contaminate the indoor environment, resulting in a worse working environment, which can adversely affect the health of people who work indoors.

On the other hand, for example, a processing tank (for example, see Patent Document 4 below) that performs various processes such as cleaning on a product needs to frequently bring the product into and out of the processing tank. In many cases, a configuration in which a part is always open is required.
Conventionally, a situation in which harmful gas leaks from openings in various processing spaces has been avoided by an air curtain that blocks the openings (see, for example, Patent Document 3 below).

JP-A-5-42591 JP 63-123939 A JP 2003-130411 A JP, 2015-160148, A

  However, the conventional air curtain alone cannot obtain a sufficient effect for the purpose of avoiding the deterioration of the working environment due to the leakage of toxic gas, and the means described in Patent Document 1 or Patent Document 2 does not provide exhaust. Unless the capacity of the system is sufficiently increased, an indoor work environment having a plurality of processing spaces cannot be satisfactorily maintained, which is disadvantageous in increasing energy efficiency.

  The present invention has been made in view of the above circumstances, and is a ventilation device that can avoid leakage of harmful gas into a room where a processing space is installed with high exhaust efficiency even with a relatively low capacity ventilation system. For the purpose of provision.

  An exhaust device according to the present invention, which has been made to solve the above problems, is blocked by an exhaust space including an opening of a processing space, a curtain outlet for generating a curtain airflow that blocks the entire opening, and the curtain airflow. An air supply port disposed in the exhaust space and directed in a direction perpendicular to the curtain airflow, and an exhaust port facing the air supply port disposed in the exhaust space with the opening interposed therebetween. It is characterized by.

The exhaust space is a space that creates an air flow for efficient exhaust, and either a configuration included in the processing space or a configuration attached to the processing space may be employed.
The air supply port may employ either natural air supply or forced air supply.
For the purpose of improving the flow of the airflow, the air supply port may be singular or plural.

  A configuration including a shielding plate facing the entire area of the curtain ejection port and a configuration including an intake port facing the entire area of the curtain ejection port so that the airflow supplied from the curtain ejection port efficiently flows into the processing space. It can also be taken.

  According to the exhaust device of the present invention, air that flows in from one end of the processing space through the air supply port (hereinafter referred to as “ventilation air”) and shielding air that flows in as a curtain airflow are on the opposite side across the opening. The curtain airflow is drawn into the processing space by being drawn from the exhaust port at the end, and the airflow (hereinafter referred to as “ventilation airflow”) in which the ventilation air and the shielding air are directed to the exhaust port is twisted in a spiral shape. The shielding air, the ventilation air, and the harmful gas or mist generated or generated in the processing space are integrated from the exhaust port by the accumulation of the interaction exerted by both of them. Will be discharged.

Due to the above effects, the intake system connected to the exhaust port can greatly reduce the required intake capacity, and a curtain airflow is formed by adopting a configuration including a shielding plate facing the entire area of the curtain outlet. It is possible to prevent the shielding air that passes through the processing space from leaking into the indoor space where the processing space is installed, and harmful gases and mist trapped in the shielding air.
As a result, the airflow supplied from the curtain jet outlet efficiently flows into the processing space, and the processing space is efficiently ventilated.
By adopting a configuration including an intake port facing the entire area of the curtain jet port, the amount of air flowing through the processing space, that is, the amount of air drawn from the exhaust port can be adjusted appropriately.

It is the schematic which shows an example of the exhaust system using the exhaust apparatus by this invention. It is explanatory drawing which shows an example which looked at the effect of the exhaust apparatus by this invention from the inner side of the exhaust port side. It is explanatory drawing which shows an example which looked at the effect of the exhaust apparatus by this invention from the outer side of the exhaust port side. It is explanatory drawing which shows an example which looked at the effect of the exhaust apparatus by this invention from the curtain jet-outlet side inner side. It is the schematic which shows an example of the exhaust system using the conventional exhaust apparatus.

Hereinafter, embodiments of an exhaust device according to the present invention will be described in detail with reference to the drawings.
The exhaust apparatus shown in FIG. 1 is configured as an exhaust apparatus for a batch pickling tank comprising two sulfuric acid tanks, one nitric hydrofluoric acid tank, and one flush tank.
In this example, a rectangular parallelepiped cleaning tank X having an opening at the top is filled with sulfuric acid, nitric hydrofluoric acid, or water (cleaning agent Y) to a certain level, and a rectangular shape into which a cleaning target can enter and exit above the liquid surface The exhaust space 1 includes a shape-like opening.

The cleaning tank X includes a curtain outlet 2 extending over the entire area along one of the long sides of the opening, and captures and processes the curtain air current ejected from the curtain outlet 2 along the other long side. A shielding plate 5 for guiding to the space is provided.
The cleaning tank X has one side surface (hereinafter referred to as “supply side end surface”) positioned on the short side of the planar shape of the cleaning tank X and the other side surface (hereinafter referred to as “supply side end surface”). A plurality of air supply ports 3 are provided side by side toward the “exhaust side end surface”, and a single or a plurality of exhaust ports 4 fewer than the air supply ports 3 are provided at the center of the exhaust side end surface.

The curtain outlet 2 is continuous with a blower duct 7 connected to a blower blower 6, and the exhaust outlet 4 is continuous with an exhaust duct 9 connected to a scrubber 8.
The blower blower 6 has a sufficient capacity to generate a curtain airflow at the opening of a desired cleaning tank X provided in the system, and the scrubber 8 has a total amount of shielding air fed by the blower blower 6. It has the capability of exhausting simultaneously the air which added the total amount of the exhaust air which should be made to flow in from the said air supply port 3 for ventilation of each washing tank X simultaneously.

With the above-described configuration, the curtain outlet 2 generates a strip-like curtain airflow toward the opposite side of the opening and shields the entire area of the opening.
In each of the three washing tanks X except the water washing tank, the stagnation that is sucked into the exhaust port 4 from the air supply port 3 and the curtain outlet 2 through the washing tank X by the suction force of the scrubber 8. A smooth ventilation air flow is generated, and smooth ventilation is performed by taking in harmful gas and harmful mist inside the cleaning tank X.

  At that time, the air for ventilation that has flowed in from the plurality of air supply ports 3 is sucked into the exhaust ports 4 that are fewer than the air supply ports 3 to cause a spiral twist, and mixed at a high pressure from the side of the twist. Combined with the pressure of the curtain airflow, a spiral ventilation airflow toward the exhaust port 4 in the exhaust space 1 is obtained.

This example employs a rectangular parallelepiped cleaning tank X having a width of 1800 mm and a length of 7500 mm, and includes a slit having a width of 20 mm that is substantially the same length as the opening as the curtain outlet 2 attached to the opening. A pair of air supply ports 3 are provided side by side on the air supply side end surface of the tank X, and a single exhaust port 4 is provided at the center of the exhaust side end surface.
This example uses a blower of 405 mR / min / 3 tank as the blower blower 6 to supply air to the curtain outlet 2 of the entire cleaning tank X at 135 mR / min / tank, and the scrubber 8 For example, it can be covered by using a blower of 300 m2 / min.

Hereinafter, it contrasts with the ventilation system conventionally attached with respect to the ventilation system of the same washing tank X.
The conventional ventilation system includes a suction port 12 extending over the entire area along the long side that opposes the curtain outlet 11, and constitutes a push-pull type ventilation device (see FIG. 5).

The curtain outlet 11 is continuous with a blower duct 14 connected to the blower blower 13, and the suction port 12 is continuous with an exhaust duct 16 connected to a scrubber 15.
The blowing capacity of the blower blower 13 and the exhaust ability of the scrubber 15 are such that a curtain airflow is generated in the openings of all the washing tanks X by the blower blower 13 of a desired washing tank X provided in the system, and The total amount of shielding air sent by the blower blower 13 is added to the total amount of exhaust air to be introduced from the opening of each cleaning tank X, so that the air can be exhausted.

  In this example, in order to send air to the curtain outlet 11 of the entire cleaning tank X at 85.4 m² / min / tank, the blower blower 13 has, for example, a blower of 256.2 m2 / min / 3 tank. It is necessary to use a blower of 1350 m² / min for the scrubber 15.

  In this way, various components such as the blower blower, scrubber and the duct arranged between them and the exhaust space, which constitute the ventilation system, are lower capacity and smaller facilities than conventional ventilation devices, respectively. In addition to meeting the initial demand for the required ventilation device, it is possible to perform more efficient ventilation.

X cleaning tank, Y cleaning agent,
1 exhaust space, 2 curtain outlet, 3 air supply port, 4 exhaust port, 5 shielding plate,
6 blower, 7 blower duct, 8 scrubber, 9 exhaust duct,
11 curtain outlet, 12 air inlet, 13 air blower, 14 air duct,
15 scrubber, 16 exhaust duct,

Claims (4)

An exhaust space including an opening of the processing space;
A curtain spout that generates a curtain airflow that blocks the entire area of the opening;
An air supply port arranged in the exhaust space blocked by the curtain airflow and directed in a direction orthogonal to the curtain airflow;
An exhaust apparatus comprising an exhaust port facing the air supply port disposed in the exhaust space with the opening interposed therebetween. The exhaust apparatus according to claim 1, comprising a plurality of the air supply ports.   The exhaust apparatus according to claim 1, further comprising a shielding plate facing the entire area of the curtain ejection port. The exhaust apparatus according to any one of claims 1 to 3, further comprising an intake port facing the entire area of the curtain ejection port.

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