JP5340842B2 - Ventilation equipment - Google Patents

Description

    The present invention relates to a ventilation device, and more particularly, for example, when a pollutant such as oil mist is safely exchanged when exhausting indoor contaminated air in which oil mist or the like has floated to the atmosphere in a factory or the like. It relates to a ventilation device to be obtained.

  In a building such as a machining factory or a press factory, a large amount of fine contaminants such as oil mist and metal powder are scattered in the work process and often float in the air in the factory. In such a factory, generally, the contaminated air in the factory where the pollutant floats is exhausted outside the building by a ventilation device or the like, and at the same time, fresh fresh air is supplied into the factory. There are various types of ventilators, such as those that simply exhaust polluted air outside the factory, and those that have an air conditioning function to supply air while exhausting, and to adjust the temperature and humidity of the incoming air at the same time. Things are used. In such a ventilator, if pollutants such as oil mist contained in the polluted air in the factory to be exhausted are discharged as they are outside the factory, they will cause air pollution and deterioration of the surrounding environment. A filter to collect is installed.

  The filter installed in the ventilation device is periodically cleaned or replaced because the effect of collecting pollutants such as oil mist is reduced when a predetermined operating time is exceeded. However, ventilators installed in factories, etc., preferentially exhaust air drifting in the upper part of the factory because pollutants such as oil mist often float in the air as described above. It is installed in a relatively high position in the room. Therefore, there has been a problem that the filter replacement work of the ventilation device is very troublesome, so that the filter replacement work takes time and labor, and is often dangerous.

  As a technique for coping with such a problem, Patent Document 1 discloses a technique that facilitates the attachment and removal work when the filter of the ventilation device is replaced. The ceiling-mounted air conditioner disclosed in Patent Document 1 is designed to allow a filter to be replaced safely and efficiently without entering the back of the ceiling. Install a filter guide that guides both sides of the filter from the filter outlet to the slit of the installed filter box, lift the filter by holding the rod-shaped operation member attached to the filter, and pull the filter from the slit along the filter guide This is because it is inserted into the filter box.

Japanese Unexamined Patent Publication No. 7-35404

  However, the ceiling-mounted air conditioner of the invention disclosed in Patent Document 1 is literally a type that is installed on the back side of the ceiling, that is, a ceiling concealing type, and therefore, for putting a filter in and out of the filter box. An important factor is to form a slit in the ceiling plate, lift the filter, guide it through the slit, and put it in and out of the filter box. However, a ventilation device including an air conditioning function installed in a factory or the like is relatively large, so that the filter itself has a considerable weight. Therefore, as in the invention of the ceiling-mounted air conditioner described in Patent Document 1, a plurality of workers are not required to lift the filter into and out of the filter box through the slit of the ceiling plate. However, there was a problem that the replacement work required a lot of labor and work time.

  Moreover, since the filter used for the ventilation apparatus including the air-conditioning function installed in a factory has a considerable weight as described above, like the ceiling-mounted air conditioner described in Patent Document 1. The method of lifting and lowering the filter from the bottom of the filter box through the slit of the ceiling plate is expected to accidentally fall on the operator's head, and is not a safe method. Furthermore, since the ceiling-mounted air conditioner disclosed in Patent Document 1 is of the ceiling concealment type as described above, it cannot be seen from the room at all, and includes whether the filter is correctly installed. There was a problem that it was difficult to confirm safety and that it was inappropriate for a ventilation device installed in a factory or the like.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a ventilator that can solve the conventional problems and can safely and reliably replace even a relatively large and heavy filter. .

  The present invention is a ventilator, characterized by a duct for exhausting air in the building to the outside from an opening formed in a wall separating the inside and outside of the building, and an exhaust fan attached to the duct A unit, a filter removably attached to the duct, and an operating means for pulling the filter up and down from the duct, and a part of the duct is located above the building. The stage is installed so as to be located immediately below the outer edge part of the installed stage, and further includes a filter mounting part in a part located immediately below the outer edge part of the stage, and the filter mounting part includes the duct. A pair of guide rails arranged so as to face each other across the inner passage, and both sides of the filter along the guide rail in the duct A filter attachment / detachment opening formed on the wall surface of the duct so as to be able to enter and exit, the pair of guide rails extending from the filter attachment portion toward a side of the outer edge portion of the stage, and the filter The operation means is detachably attached to the filter mounting portion of the duct while being lifted or suspended while being guided from the stage to the guide rail.

  Further, as an embodiment according to the ventilator of the present invention, the ventilator includes alarm means for generating an alarm by detecting clogging of the filter medium of the filter, and the alarm means includes the filter mounting portion and the exhaust device. A differential pressure detector installed to detect a differential pressure between the air pressure in the duct and the atmosphere between the air unit and a controller; a controller receiving a detection signal from the differential pressure detector; An alarm device that receives a signal from the controller and issues an alarm when it is determined that the differential pressure between the atmospheric pressure in the duct and the atmosphere exceeds a predetermined value in response to a detection signal from a pressure detector Has been.

  Furthermore, as another embodiment according to the ventilator of the present invention, the ventilator includes a first support net that supports the filter medium of the filter installed in the filter mounting portion of the duct in the air flow direction. The first support net is installed in the vicinity of the downstream side of the filter.

  As another embodiment of the ventilator according to the present invention, the ventilator includes a second support net that protects the filter medium of the filter installed at the filter attachment portion of the duct, and the second support A net is installed in the vicinity of the upstream side of the filter.

  According to the ventilator of the present invention, for example, even if the duct is installed at a relatively high position in the factory, a part of the duct is located near the outer edge of the accessible stage installed above the factory. Because it can be attached to and removed from the filter attachment part of the duct by suspending the filter from above the stage by forming the filter attachment part in the duct part located directly below the outer edge part of the stage, The filter can be replaced quickly, easily and safely.

  Further, according to the ventilator of the present invention, the differential pressure detector detects the differential pressure between the air pressure in the duct between the filter mounting portion and the pressure fan unit and the atmosphere, and the differential pressure exceeds a predetermined value. In response to a signal from the controller, a warning is issued, so that the filter can be cleaned and replaced before it becomes clogged and its function is extremely degraded. Contaminants such as oil mist drifting inside can be collected efficiently, and the air pollution level in the building can be kept low.

  Furthermore, according to the ventilator of the present invention, the first support net is installed in the vicinity of the downstream side of the filter so as to support the filter medium of the filter installed in the filter mounting portion of the duct in the air flow direction. Even if clogging occurs in the filter medium and the pressure in the duct between the filter mounting portion and the pressure fan increases, the filter medium is prevented from being pulled and damaged to the pressure fan unit side, that is, the downstream side. This is particularly effective when the above-described differential pressure detector for some reason does not detect a functional deterioration due to clogging of the filter medium. That is, if this support net does not exist, the filter medium is sucked to the side of the pressure fan unit and is partially damaged, and contaminants may be released from the damaged portion to the atmosphere.

  Furthermore, according to the ventilator of the present invention, the second support net is installed in the vicinity of the upstream side of the filter so as to protect the filter medium installed in the filter mounting portion of the duct. During the movement of the material, it does not collide with the filter medium and damage the filter medium. As a result, it is possible to prevent the pollutant from being released into the atmosphere from the damaged part as described above.

1 is a perspective view schematically showing a ventilator according to an embodiment of the present invention installed in a factory. The longitudinal cross-sectional view which shows the ventilation apparatus of FIG. 1 schematically. FIG. 2 is a top view showing a duct filter mounting portion in the ventilation apparatus shown in FIG. 1 partially broken from above. FIG. 4 is a partial perspective view showing in detail a configuration of a filter mounting portion shown in FIG. 3. The perspective view which shows the filter attached or detached by the filter attachment part of a duct.

  Hereinafter, the ventilation apparatus of the present invention will be described in more detail with respect to a preferred embodiment shown in the drawings. In order to facilitate understanding of the present invention, FIGS. 1 to 5 show a ventilator 10 having a function of only discharging air in a factory to the atmosphere as one embodiment. However, the ventilator of the present invention is a ventilator with an air-conditioning function, specifically, an air-conditioning function that regulates the humidity of fresh air while exhausting polluted air in the factory and takes it into the factory. The present invention can also be applied to an apparatus and a circulation type air conditioner that purifies contaminated air in a factory, adjusts the temperature of the purified air, and sends the air to the factory.

  The ventilator 10 of this embodiment includes a duct 12 that exhausts air in a building from an opening 11 formed in a wall W that separates the inside and outside of a factory that is a building, and one exhaust fan unit that is attached to the duct 12. The pressure fan unit 14 which is an aspect is provided. The duct 12 is installed, for example, so as to pass under an accessible stage installed at a relatively high position in the factory. In general, in a factory or the like, a passage called a corridor is often installed along a wall W separating the inside and outside of the factory at a relatively high position from the floor. It is one aspect | mode. In FIG. 1 and FIG. 2 showing the entirety of the ventilating apparatus 10 according to an embodiment of the present invention, a walkway installed along the wall W separating the inside and outside of the factory is indicated by a symbol S.

  The ventilator 10 of this embodiment will be described more specifically. A duct 12 having a quadrangular cross section is formed at the indoor side end of the pressure fan unit 14 attached and attached to the opening 11 formed in the wall W. One end part which is the exhaust port 13a is connected, and the other end part which forms the suction inlet 13b is extended indoors. The pressure fan unit 14 includes an electric fan 14a that sucks air in the factory from the suction port 13b of the duct 12 and discharges the air into the atmosphere through the exhaust port 13a. An elbow-shaped duct for preventing rain from entering the pressure fan unit 14 at the outdoor end of the pressure fan unit 14 attached to the opening 11 so as to be fitted in the opening 11, That is, the weather cover 15 is connected.

  The other end side of the duct 12 in which the suction port 13b is formed at the distal end extends toward the room, passes under the corridor S installed in the room, and jumps out of the corridor S. . Specifically, as shown in FIGS. 2 and 3, the suction port side end portion of the duct 12 crosses the virtual perpendicular line L that is lowered from the outer edge Se of the walkway S toward the floor (not shown). It extends in a direction away from the outer edge Se. Therefore, when an operator stands on the walkway S and looks down along the outer edge Se, the suction port side end of the duct 12 protrudes from the bottom of the walkway S so that the tip end of the suction port 13a. In this way, when the duct portion that protrudes from the bottom of the corridor S beyond the outer edge Se, that is, the duct portion located immediately below the outer edge Se is referred to as an overhang 16 for convenience, the overhang 16 of the duct 12 A filter mounting portion 17 is formed, and a filter 18 shown in FIG. 5 is detachably installed on the filter mounting portion 17.

  Next, the structure of the filter attachment portion 17 in the duct 12 will be described. As shown in FIGS. 3 and 4, the duct 12 having a quadrangular cross section includes a top plate 12 a and a bottom plate 12 b facing each other, and two side plates 12 c and 12 d facing each other. The filter mounting portion 17 is formed on the top plate 12a with a notch portion 19 formed in the two side plates 12c and 12d and the notch portion 19 that is continuous with the notch portion 19 and has the same notch width as the notch portion 19. The notch 20 includes a notch 20 and a guide rail 21 attached so as to be fitted in each notch 19 formed in each side plate 12c, 12d. The notch 20 formed in the top plate 12a is a filter 18. Is opened as an opening for taking in and out of the duct 12, that is, an opening for attaching and detaching the filter.

  The guide rail 21 is formed of a U-shaped channel member, and the groove portion thereof is a guide groove 21a for guiding the filter 18, and the guide groove 21a faces the inside of the duct 12, that is, two guides facing each other. The guide grooves 21a of the rails 21 are fitted into the notches 19 of the side plates 12c and 12d so as to face each other across the passage in the duct 12, and are fixed to the side plates 12c and 12d by appropriate means such as welding. .

  The two guide rails 20 extend straight upward and rise up to the outer edge Se of the walkway S. By the way, as shown in FIG. 5, the filter 18 is a filter medium (pleats) folded in a bellows shape inside an annular frame 22 formed by plate-like upper and lower frame plates 22a, 22b and side frame plates 22c, 22d. 23), and such a filter 18 itself is already well known. A handle 24 as a part of operating means for raising and lowering the filter 18 is attached to the upper frame plate 22 a of the annular frame 22 in the filter 18, and a wire 25 for hanging or lifting is attached to the handle 24. One end is connected. Therefore, this wire 25 is also a component of the operating means for raising and lowering the filter 18.

  A first metal net, that is, a first support net 26 for protecting the filter medium 23 of the filter 18 is disposed in the vicinity of the downstream side of the filter mounting portion 17 of the duct 12 where the filter 18 is disposed. Specifically, as clearly shown in FIG. 4, several L-type stoppers 27 are welded or screwed or bolted at appropriate positions on the side plates 12c and 12d constituting the duct 12 adjacent to the guide rail 21. The first metal mesh 26 is disposed between the stoppers 27 and the side portions of the guide rails 21 so that the outer peripheral surface thereof is in contact with the stoppers 27. It is connected to the metal fitting 27 by welding or using screws or bolts.

  Similarly, in the vicinity of the upstream side of the filter mounting portion 17 of the duct 12 in which the filter 18 is disposed, in other words, between the guide rail 21 and the suction port 13a of the duct 12 and close to the guide rail 21. In addition, several L-shaped stoppers 28 are fixed at appropriate positions on the side plates 12c and 12d by welding, screws, bolts, or the like, and a second portion between the stoppers 28 and the side portion of the guide rail 21 is fixed. A metal mesh, that is, a second support net 29 is disposed, and the second metal mesh 29 is disposed so that the outer peripheral surface thereof abuts on each fastener 28 and is welded to each fastener 28 or a screw, a bolt, or the like. Are connected.

  When the first wire mesh 26 begins to clog the filter medium 23 of the filter 18, the pressure inside the duct between the filter mounting portion 17 and the pressure fan unit 14 decreases, and the filter medium 23 of the filter 18 moves toward the downstream side. On the other hand, the second wire mesh 29 prevents the material handled in the factory from accidentally hitting the filter 18 from the suction port 13a of the duct 12 and damaging the filter medium 23. It is attached to Since these two metal meshes 26 and 29 are not cleaned or exchanged during use of the ventilation device 10, they are attached at predetermined positions in advance when the duct 12 is manufactured.

  In the ventilator 10 of this embodiment, in addition to installing the first wire net 26 as a means for preventing the filter medium 23 of the filter 18 from being damaged due to the reduced pressure in the duct 12, the filter medium 23 of the filter 18 begins to clog. There is a warning means to let you know. As shown in FIG. 2, the alarm means is connected to the differential pressure detector 30 installed outside the duct 12 and electrically connected to the differential pressure detector 30 so that it is outside the duct 12 or at a suitable place in the factory. The alarm 31 is installed and a controller (not shown) that activates the alarm 31 in response to a signal from the differential pressure detector 30. The alarm device 31 includes a means for notifying the clogging of the filter medium 23 with light and a means for notifying with sound.

  The differential pressure detector 30 has two pressure detection ports 30a and 30b, one of which is opened to the atmosphere to detect the pressure outside the duct 12, and the other one port 30b has a hose. One end of 32 is connected, and the other end is drawn into the duct 12 to detect the pressure in the duct 12, that is, between the filter mounting portion 17 and the pressure fan unit 14. The differential pressure detector 30 installed in this way detects the differential pressure between the pressure in the duct 12 between the filter mounting portion 17 and the pressure fan unit 14 and the atmosphere, and supplies a signal to the controller. . When the controller receiving the signal from the differential pressure detector 30 judges that the filter medium 23 of the filter 18 starts to clog and the differential pressure between the pressure in the duct 12 and the atmosphere exceeds a predetermined value, the alarm 31 To activate the alarm.

  Next, the usage method of the ventilation apparatus 10 which concerns on above-mentioned embodiment is demonstrated. The ventilator 10 is located at the tip of an overhanging portion 16 in which air in a factory containing pollutants such as oil mist overhangs the outer edge Se of the corridor S in a normal operation state. It is sucked from the suction port 13b and exhausted to the atmosphere via the filter 18. When the ventilator 10 continues to operate for a long period of time, contaminants such as oil mist are collected on the filter medium 23 of the filter 18 and gradually become clogged. As a result, the pressure in the duct 12 between the filter mounting portion 17 and the pressure fan unit 14 decreases, and when this pressure falls below a predetermined value, the controller that receives the differential pressure detection signal from the differential pressure detector 30 Is detected and the alarm 31 is activated to notify the replacement of the filter 18.

  When the alarm 31 notifies the replacement of the filter 18 in this way, the operator goes up to the corridor S and holds the other end of the hanging wire 25 connected to the vicinity of the outer edge Se so that the filter 18 is attached to the filter mounting portion. Pull up from 17. Since both side frame plates 22 c and 22 d of the annular frame 22 are slidably fitted in the guide grooves 21 a of the guide rail 21, the filter 18 is pulled upward while being guided by the guide rail 21, and the top plate 12 a of the duct 12. It is pulled out from the filter attaching / detaching opening 20 formed in the above. Since the guide rail 21 extends to the vicinity of the base of the handrail F installed on the outer edge Se of the walkway S, when the filter 18 is pulled up to the vicinity of the handrail F, the operator removes it from the guide rail 21. Temporarily placed in the corridor S.

  Next, a new filter 18 prepared in advance is fitted to the guide groove 21a from the upper end of the guide rail 21 at both sides thereof, that is, both side frame plates 22c and 22d of the annular frame 22, and is suspended by the suspension wire 25. Then, it is lowered along the guide rail 21 and is inserted into the duct 12 through the filter attaching / detaching opening 20. Thus, when the new filter 18 is disposed in the filter mounting portion 17 of the duct 12, the upper frame plate 22 a in the annular frame 22 of the filter 18 is formed in the filter attaching / detaching opening 20 formed in the top plate 12 a of the duct 12. Therefore, the filter attaching / detaching opening 20 is never opened.

  In the ventilator 10 according to this embodiment, as described above, an operator goes up to the walkway S located above the duct 12, where the both sides of the filter 18 are fitted between the two guide rails 21, and then it is used. Since the filter 18 can be attached and detached by lowering it to the filter mounting portion 17 of the duct 12 with the suspension wire 25, there is no danger to the operator at the time of replacement work, and the filter 18 can be replaced quickly and reliably. It can be performed.

  In the ventilator 10 of the above-described embodiment, the duct 12 passes through the lower part of the corridor S, and the suction port side end is installed so as to protrude from the outer edge Se. For example, in a factory, the duct 12 is passed under various stages such as a landing stage of a steel-structured staircase made in the same way as an emergency staircase or a monitoring stand for people to enter, and the inlet side Even if the end portion is installed so as to protrude from the outer edge portion of the stage, the replacement of the filter 18 can be performed safely, quickly and easily as in the above-described embodiment.

  Further, in the ventilator 10 of the above-described embodiment, the duct 12 is for the case where the duct 12 is disposed so as to pass under the stage such as the corridor S and jump out from the outer edge Se thereof. In the apparatus, the duct 12 does not have to pass under the stage. That is, in the ventilator of the present invention, the duct 12 having one end portion where the exhaust port 13a is formed connected to the pressure fan unit 14 extends toward the stage, and a part of the duct 12 is positioned immediately below the vicinity of the outer edge portion of the stage. Then, the filter mounting portion 17 may be formed at that portion.

  As is clear from the above description, the ventilator of the present invention is arranged such that a part of the duct constituting the ventilator is located immediately below the outer edge of the stage including the corridor S and the landing for staircases. The filter mounting portion is formed in the duct portion located immediately below the outer edge portion of the stage, and the filter is taken out and removed from the stage to the filter mounting portion. It is not necessary for most of the ducts to be located below the stage as in the above-described embodiment, the opening of the wall to which the exhaust fan unit is attached does not need to exist below the stage, and the stage itself It does not need to be installed along the walls separating the inside and outside of the building. Moreover, in the above-described embodiment, the exhaust fan unit is directly attached to the opening formed in the wall. However, the attachment position of the exhaust fan unit is not limited to this embodiment. It includes various modes such as a case of being divided and attached so as to be interposed between the divided ducts, and a case of being attached in the duct.

  Furthermore, in the ventilator according to the above-described embodiment, the operation means for putting the filter in and out of the filter mounting portion of the duct is composed of the handle provided on the annular frame of the filter and the wire connected thereto. The invention is not limited to such a structure, and a hook-like hanging rod with a hook at the tip can be used instead of a wire.

DESCRIPTION OF SYMBOLS 10 Ventilation device 11 Opening formed in wall W 12 Duct 12a Top plate 12b Bottom plate 12c, 12d Side plate 13a Suction port 13b Exhaust port 14 Pressure fan unit (exhaust unit)
16 Overhanging portion 17 Filter mounting portion 18 Filter 19 Notch portion 20 Notch portion (filter opening / removal opening)
21 guide rail 21a guide groove 22 annular frame 23 filter medium 24 handle (part of operation means)
25 Hanging wire (part of operating means)
26 First wire mesh (first support net)
29 Second wire mesh (second support net)
30 Differential pressure detector 31 Alarm S Walkway Se Outer edge of walkway F Handrail W Wall separating the inside and outside of the factory

Claims (4)

A duct for exhausting the air in the building to the outside from an opening formed in a wall separating the inside and outside of the building, an exhaust unit attached to the duct, a filter detachably attached to the duct, An operating means for pulling up the filter from the duct or lowering the filter into the duct;
The duct is installed so that a part of the duct is located immediately below the outer edge portion of an accessible stage installed above the building, and at a portion located immediately below the outer edge portion of the stage. With a filter mounting section,
A pair of guide rails arranged so that the filter mounting portions face each other across the passage in the duct, and both sides of the filter should be able to enter and exit the duct along the guide rails A filter attaching / detaching opening formed on the wall surface of the duct, and the pair of guide rails extends from the filter attaching portion toward a side of the outer edge portion of the stage,
The ventilator characterized in that the filter is detachably attached to the filter mounting portion of the duct while being lifted or suspended while being guided from the stage to the guide rail by the operating means.   The ventilator includes alarm means for detecting a clogging of the filter medium of the filter and issuing an alarm, and the alarm means includes an air pressure between the air pressure inside the duct and the atmosphere between the filter mounting portion and the exhaust fan unit. A differential pressure detector installed to detect the differential pressure; a controller that receives a detection signal from the differential pressure detector; and the controller receives the detection signal from the differential pressure detector and receives the detection signal from the differential pressure detector. The ventilator according to claim 1, further comprising: an alarm device that issues a warning in response to a signal from the controller when it is determined that the differential pressure between the air and the atmosphere exceeds a predetermined value.   The ventilation device includes a first support net that supports the filter medium of the filter installed in the filter mounting portion of the duct in the air flow direction, and the first support net is installed in the vicinity of the downstream side of the filter. The ventilator according to claim 1 or 2.   The ventilator includes a second support net that protects the filter medium of the filter installed at the filter mounting portion of the duct, and the second support net is installed in the vicinity of the upstream side of the filter. The ventilation apparatus in any one of 1-3.

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