JP2003047816A6 - Filter monitoring apparatus and filter monitoring method - Google Patents

Abstract

An object of the present invention is to provide a filter monitoring device capable of accurately notifying the replacement time of an air filter and such a filter monitoring method.
An opening 11 is provided on a wall surface of a coating chamber 10, and a check damper 3 is provided on an outer upper portion of the opening 11 so as to swing with respect to the opening 11 via a hinge. A patrol light 5 having an opening degree detection sensor 51 as a switch is disposed on the upper side of the check damper 3, and when the opening angle of the check damper 3 reaches a constant value, the patrol light 5 touches the opening degree detection sensor 51. Arrange to operate.
[Selection] Figure 2

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a circulating air filter monitoring device, and more particularly to a filter monitoring device for an air supply system in an environment in which filter clogging is likely to occur, such as in a paint line.
[0002]
[Prior art]
Conventionally, in the painting process of manufacturing equipment, a method of spraying and spraying paint on products has been widely adopted. In such a spray painting process, the product is carried into the painting chamber, and the paint is sprayed onto the product in the painting chamber. Since the spray particles of paint and solvent are floating in such a paint chamber and the air in the paint chamber is contaminated, the air in the paint chamber is exhausted to improve the working environment and increase the drying speed. The air in the coating chamber is purified by filtering with an air filter provided on the way.
[0003]
By the way, such an air filter needs to be replaced when clogging progresses to some extent. As a method for detecting the degree of clogging, a mechanism is known in which a detection tube is provided before and after the air filter and a signal is generated when the difference in air pressure between the front side and the rear side of the air filter exceeds a certain value. It has been.
[0004]
[Problems to be solved by the invention]
However, the air flowing into the air filter contains a large amount of paint fine particles and solvent fine particles, and paint fine particles enter the tip and inside of the detection tube, block the tip of the detection tube, and solvent particles enter the pressure. In some cases, the detection sensitivity may be lowered or malfunction may be caused. If the painting operation is continued while the air filter is clogged, the working environment is deteriorated, the pressure in the painting chamber is increased, and the pressure difference from the outside of the painting chamber is increased. If the door that isolates the inside and outside of the painting chamber is opened in this state, air flows from the painting chamber having a high atmospheric pressure toward the outside of the painting chamber at a stretch, so that the door may be pushed open with a strong force.
[0005]
The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a filter monitoring device and such a filter monitoring method capable of accurately reporting the replacement time of an air filter.
[0006]
[Means for Solving the Problems]
The filter monitoring apparatus according to the present invention includes a first atmospheric pressure detection unit that detects an atmospheric pressure in a processing chamber that includes an air supply system and an air exhaust system that exhausts air through a filter, and detects an atmospheric pressure outside the processing chamber. Second atmospheric pressure detecting means, and means for determining whether the filter is clogged based on a pressure difference between the first atmospheric pressure detecting means and the second atmospheric pressure detecting means.
[0007]
In the filter monitoring apparatus described above, an example of the first atmospheric pressure detection unit is an indoor atmospheric pressure sensor disposed in the processing chamber, and the second outdoor atmospheric pressure detection unit is disposed outside the processing chamber. As an example of means for determining whether or not the filter is clogged, the outdoor pressure sensor is connected to the indoor pressure sensor and the outdoor pressure sensor, and the filter An alarm device that detects the presence or absence of clogging can be mentioned.
[0008]
Another filter monitoring device of the present invention is disposed in an opening that communicates the inside of a processing chamber having an air supply system and an air exhaust system that exhausts through a filter, and the outside of the processing chamber, Detecting means for detecting the force of air moving between the inside and outside of the processing chamber; and notifying means for notifying when the detected force of moving air reaches a predetermined value.
[0009]
In the filter monitoring apparatus described above, an example of the detection unit includes a check damper that swings in response to the force of air moving between the inside and the outside of the processing chamber, and an example of the notification unit includes the check of the check damper. An opening detection sensor that issues a notification signal when the opening angle reaches a predetermined value, and a patrol light or a buzzer that operates according to the notification signal can be exemplified.
[0010]
In the filter monitoring apparatus described above, as another example of the detection means, a fan that rotates by receiving the force of air moving between the inside and the outside of the processing chamber, and a generator or a rotation attached to a rotation shaft of the fan As another example of the notification means, a notification circuit that generates a notification signal when the power generation voltage or the rotation speed of the generator reaches a predetermined value, and the notification circuit operate. There may be mentioned a palite or buzzer.
[0011]
According to the filter monitoring method of the present invention, a swingable door is disposed in an opening for exhausting air from the room to the outside of a processing chamber provided with an air supply system and an air exhaust system for exhausting air through the filter. An opening angle of the door is detected, and notification is made when the opening angle exceeds a predetermined value.
[0012]
According to another filter monitoring method of the present invention, a swingable damper is disposed in an opening for exhausting air from the inside of a processing chamber having an air supply system and an air exhaust system for exhausting air through the filter. The opening angle of the check damper is detected by an opening detection sensor, and a notification is given when the opening angle exceeds a predetermined value.
[0013]
According to another filter monitoring method of the present invention, there is provided a chuck damper capable of swinging in an opening for exhausting air from the inside of a processing chamber having an air supply system and an air exhaust system for exhausting air through the filter. And an opening angle detection sensor that detects an opening angle of the check damper and activates a patrol light or a buzzer when the opening angle exceeds a predetermined value.
[0014]
According to still another filter monitoring method of the present invention, a fan is attached to a rotary shaft in an opening for exhausting air from the room to the outside of a processing chamber having an air supply system and an air exhaust system for exhausting air through the filter. A generator or a rotational speed detector is provided, and when a power generation voltage or rotational speed of the generator exceeds a predetermined value, a patrol light or a buzzer is operated to notify.
[0015]
In the present invention, since the clogging of the air filter is accurately detected and the time required for replacement is notified, the replacement of the air filter can be performed without waste. In addition, by appropriately replacing the air filter, it is possible to keep the working environment in the coating chamber proper, and to prevent the door from being suddenly opened due to the clogging of the air filter.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
(First Embodiment) A filter monitoring system according to the first embodiment of the present invention will be described below. FIG. 1 is a diagram showing an overall configuration of a filter monitoring system according to the present embodiment, and FIG. 2 is a check damper 3 used in the filter monitoring system.
[0017]
As shown in FIG. 1, the filter monitoring system according to the present embodiment includes a painting chamber 10, an opening 11 disposed on the wall surface of the painting chamber 10, and a check damper 3 disposed in the opening 11. And an air supply duct 12 for supplying air into the painting chamber 10 and an exhaust duct 13 for exhausting the air inside the painting chamber 1 to the outside. A clean air supply device (not shown) for supplying clean air is disposed on the upstream side of the air supply duct 12 in the air movement direction, and the clean air supplied from the clean air supply device is supplied to the air supply duct 12. To be supplied into the painting chamber 10.
[0018]
An upstream end of the exhaust duct 13 in the air movement direction is disposed in the painting chamber 13 through an opening 14 disposed in the wall surface of the painting chamber 10, and the exhaust duct 13 is disposed outside the painting chamber 10. Has been derived. An exhaust device 15 is disposed at an end 13B of the exhaust duct 13 on the downstream side in the air movement direction. An exhaust fan 16 and an exhaust motor 17 that drives the exhaust fan 16 are disposed in the exhaust device 15, and the exhaust fan 16 is rotated by the exhaust motor 17, whereby the air in the exhaust duct 13 is externally supplied from the exhaust port 18. To exhaust. A filter 20 is disposed between the exhaust duct 13 and an end portion 13B on the downstream side in the air movement direction of the exhaust duct 13 and the exhaust device 15, and the paint in the air that has flowed out of the coating chamber 10 through the exhaust duct 13 is provided. Particles, solvent particles, other contaminants, dust and dirt are filtered and removed by the filter 20 and then exhausted to the outside through the exhaust port 18.
[0019]
The check damper 3 attached to the opening 11 provided on the wall surface of the painting chamber 10 is a rectangular or square plate-like member, and as shown in FIG. It is attached so as to be swingable in the direction indicated by the double arrow A in FIG. A warning alarm, for example, Patlite (registered trademark) 5 is attached to the upper side of the chuck damper 3. An opening degree detection sensor 51 that functions as a switch of the patrol light 5 is attached to the lower surface of the patrol light 5 in an oblique direction, as shown in FIG. For example, when the angle reaches 45 degrees, the root portion close to the hinge 31 of the check damper 3 pushes up the opening degree detection sensor 51 to operate the patrol light 5.
[0020]
Next, how the filter monitoring system according to the present embodiment operates will be described.
[0021]
In FIG. 1, when the filter 20 is still new and not clogged, clean air is supplied from the air supply duct 12, while dirty air in the coating chamber 10 is supplied via the exhaust duct 13. Since the exhaust air is exhausted at substantially the same flow rate as the clean air, the supplied clean air and the dirty air exhausted are offset, and the atmospheric pressure in the coating chamber 10 is kept equal to the outdoor atmospheric pressure (atmospheric pressure). It is. Therefore, the check damper 3 is kept substantially vertical by its own weight, and is kept in the state shown by the dotted line in FIG. That is, in this state, the check damper 3 completely closes the opening 11.
[0022]
On the other hand, when the filter 20 has been replaced for a considerable time and the filter 20 is clogged, the amount of clean air supplied from the air supply duct 12 into the painting chamber 10 is reduced. The amount of dirty air exhausted from the exhaust duct 13 to the outside is reduced. When the amount of air that exits relative to the amount of air entering in this way decreases, an excessive amount of air stays in the painting chamber 10, and the pressure inside the painting chamber 10 is the pressure outside the painting chamber 10 (large The atmospheric pressure in the coating chamber 10 is kept at a positive pressure.
[0023]
Then, since air tends to flow out from the inside of the painting chamber 10 to the outside of the painting chamber 10, the check damper 3 of the opening 11 is pressed leftward in FIG.
[0024]
When the degree of clogging of the filter 20 is slight, if the check damper 3 is pushed and a gap is formed between the opening 11 and the check damper 3 to allow air to flow out, excess air is reduced. Since this gap flows out of the coating chamber 10 and reduces the atmospheric pressure in the coating chamber 10, the check damper 3 does not need to reach the opening detection sensor 51 that functions as a switch of the patrol light 5, Excessive pressure rise is eliminated.
[0025]
However, when the degree of clogging of the filter 20 progresses and the amount of air exhausted from the exhaust duct 13 is extremely lower than the amount of clean air supplied from the air supply duct 12, the pressure in the painting chamber 10 increases. Accordingly, the swing angle of the check damper 3 also increases. When the rocking angle of the check damper 3 reaches a predetermined value, for example, 45 degrees, the check damper 5 pushes the opening detection sensor 51 that functions as a switch of the patrol light 5 to activate the patrol 5.
[0026]
As described above, in the filter monitoring system according to the present embodiment, when the clogged state of the filter 20 reaches a certain value, the patrol light 5 is operated to notify the operator, so that the replacement time of the filter 20 can be appropriately set without excess or deficiency. It becomes possible to exchange at the time. Further, in the filter monitoring system according to the present embodiment, the check damper 3 acts as a safety valve to reduce the pressure in the painting chamber 10, so that the door (not shown) of the painting chamber 10 suddenly opens and hits an operator. The risk of accidents is prevented.
[0027]
(Second Embodiment) The second embodiment of the present invention will be described below. FIG. 3 is a diagram showing an overall configuration of the filter monitoring system according to the present embodiment, and FIG. 4 is a fan used in the filter monitoring system.
[0028]
In the filter monitoring system according to the present embodiment, a generator 33 having a fan 32 attached to a rotating shaft is disposed in the opening 11 instead of the check damper used in the first embodiment. The power generation terminal of the generator 33 is provided with a notification circuit (not shown) that issues a notification signal when the voltage of electricity generated by the generator 33 reaches a predetermined value. The patrol light 5 is structured to operate.
[0029]
According to the present embodiment, the magnitude of the positive pressure in the coating chamber is detected via the fan and the generator, and the patrol 5 is operated and notified when the pressure in the coating chamber reaches a certain value. A certain effect is obtained that it is reliable and the accuracy of detecting the positive pressure can be accurate.
[0030]
(Third Embodiment) The third embodiment of the present invention will be described below. FIG. 4 is a diagram showing the overall configuration of the filter monitoring system according to the present embodiment.
[0031]
In the filter monitoring system according to the present embodiment, the atmospheric pressure sensors 40 and 41 are disposed inside and outside the coating chamber 10 in place of the check damper and the fan used in the above embodiment. These atmospheric pressure sensors 40 and 41 are connected to a determination device 42, which detects an atmospheric pressure difference inside and outside the coating chamber 10 based on an atmospheric pressure signal sent from the atmospheric pressure sensors 40 and 41. When the value reaches a predetermined value, it is determined that the filter 20 is clogged, and the determination device 42 operates the alarm device, for example, the patrol light 5.
[0032]
In the filter monitoring apparatus according to the present embodiment, it is not necessary to arrange the opening 11, check valve, fan, or the like as in the above-described embodiment. Therefore, it is necessary to remodel the painting chamber 10 to install the filter monitoring system. A characteristic effect that there is almost no effect is obtained.
[0033]
【The invention's effect】
In the present invention, since the clogging of the air filter is accurately detected and the time required for replacement is notified, the replacement of the air filter can be performed without waste. In addition, by appropriately replacing the air filter, the working environment in the coating chamber can be kept appropriate, and a sudden opening operation of the door due to clogging of the air filter can be prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a filter monitoring system according to a first embodiment.
FIG. 2 is a view showing a check damper used in the filter monitoring system according to the first embodiment.
FIG. 3 is a diagram showing an overall configuration of a filter monitoring system according to a second embodiment.
FIG. 4 is a diagram showing a fan used in a filter monitoring system according to a second embodiment.
FIG. 5 is a diagram showing an overall configuration of a filter monitoring system according to a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Check damper, 5 ... Patrite, 51 ... Opening detection sensor, 10 ... Painting chamber, 11 ... Opening part, 12 ... Air supply duct, 13 ... Exhaust duct, 14 ... Opening part, 15 ... Exhaust device, 16 ... Exhaust Fan, 17 ... exhaust motor, 18 ... exhaust port, 20 ... filter, 31 ... hinge, 32 ... fan, 33 ... generator.

Claims (9)

First atmospheric pressure detection means for detecting the atmospheric pressure in the processing chamber provided with an air supply system and an air exhaust system exhausted through a filter;
Second atmospheric pressure detection means for detecting atmospheric pressure outside the processing chamber;
A filter monitoring apparatus comprising: means for determining whether the filter is clogged based on a pressure difference between the first atmospheric pressure detection means and the second atmospheric pressure detection means. 2. The filter monitoring apparatus according to claim 1, wherein the first atmospheric pressure detection means is an indoor atmospheric pressure sensor disposed in the processing chamber, and the second atmospheric pressure detection means is located outside the processing chamber. An outdoor pressure sensor disposed in the filter, and means for determining whether the filter is clogged is connected to the indoor pressure sensor and the outdoor pressure sensor. A filter monitoring device, characterized in that it is an alarm device for detecting the presence or absence. Air that moves between the inside and outside of the processing chamber that is disposed in an opening that communicates the inside of the processing chamber having an air supply system and an air exhaust system that exhausts through a filter and the outside of the processing chamber. Detecting means for detecting the force of
And a notifying means for notifying when the detected force of the moving air reaches a predetermined value. The filter monitoring apparatus according to claim 3, wherein the detection means is a check damper that swings in response to the force of air moving between the inside and outside of the processing chamber,
The filter monitoring device, wherein the notification means is an opening degree detection sensor that generates a notification signal when an opening angle of the check damper reaches a predetermined value, and a patrol or a buzzer that operates according to the notification signal. 4. The filter monitoring apparatus according to claim 3, wherein the detection means is a fan that rotates by receiving the force of air moving between the inside and outside of the processing chamber, and a generator attached to the rotation shaft of the fan, or A rotational speed detector,
The filter monitoring device, wherein the notification means is a notification circuit that issues a notification signal when a power generation voltage of the generator reaches a predetermined value, and a patrol or a buzzer that is operated by the notification circuit. A swingable door is provided at the opening for exhausting air from the room to the outside of a processing chamber equipped with an air supply system and an air exhaust system that exhausts air through a filter, and the opening angle of the door is detected. Then, a filter monitoring method is provided that notifies when the opening angle exceeds a predetermined value. An oscillation angle of the chuck damper is provided in a processing chamber having an air supply system and an air exhaust system for exhausting air through a filter. Is detected by an opening detection sensor, and a notification is given when the opening angle exceeds a predetermined value. An oscillation angle of the chuck damper is provided in a processing chamber having an air supply system and an air exhaust system for exhausting air through a filter. Is detected by an opening detection sensor, and when the opening angle exceeds a predetermined value, a patrol or buzzer is operated to notify the filter monitoring method. A generator having a fan attached to a rotating shaft is disposed in an opening for exhausting air from the room to the outside of a processing chamber provided with an air supply system and an air exhaust system for exhausting through a filter. A filter monitoring method characterized in that when a generated voltage exceeds a predetermined value, a patrol light or a buzzer is operated to notify.

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