JP7240952B2 - Filter device, filter switching method, and filter replacement method - Google Patents

Description

The present invention relates to a filter device, a filter switching method, and a filter replacement method.

In Patent Document 1, a filter device is attached to the intake side of an internal combustion engine, and in a diesel generator for a nuclear power plant, foreign matter in the atmosphere is removed by the filter body in order to perform stable operation when the power supply is lost. Remove. Further, in Patent Document 1, there is a possibility that volcanic ash from a volcanic eruption may be mixed into intake air, and when the filter body is clogged with volcanic ash, it is possible to easily replace the filter body without stopping the internal combustion engine. purpose.

For this reason, the filter device described in Patent Document 1 includes a filter body that captures volcanic ash contained in the intake air of the internal combustion engine, and a first rail that supports the filter body so as to be slidable in a direction that intersects the flow direction of the intake air. , a second rail arranged upstream or downstream of the first rail in the direction of flow of intake air and slidably supporting a closing plate through which intake air cannot pass in the cross direction; and a plurality of filter bodies arranged in the cross direction. a frame supporting the first rail so as to be arranged and supporting the second rail such that the plurality of closing plates are arranged side by side in the cross direction.

JP 2019-037933 A

The filter device described in Patent Document 1 is installed when high-concentration volcanic ash is expected to fall. Installing the filter device when necessary in this manner consumes a lot of time and labor if the installation area of the filter body is large. On the other hand, if the filter body is permanently installed, the filter body will be used all the time, and there is a possibility of deterioration. In general, in a filter device, the filter main body is arranged so as to partition the flow path through which air flows, so the performance of the filter main body for trapping fine particles is restricted based on the size of the cross-sectional area of the flow path. In the replacement of the filter body, the filter device described in Patent Document 1 uses a closing plate to prevent intake air from passing through the filter body. The replacement work is not easy because the main body is replaced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter device and a filter switching method that can protect the filter body when not in use and easily allow the filter body to function when in use. do. Another object of the present invention is to provide a filter replacement method that facilitates replacement of the filter body.

In order to achieve the above object, a filter device according to an aspect of the present invention includes a filter body having ventilation holes formed on two surfaces of a housing containing a filter medium, and the filter body being detachably installed. and the closing member for preventing the flow of gas are switched to allow the gas to circulate without passing through the vent holes of the filter body, while allowing the gas to circulate through the vent holes of the filter body. and a switching mechanism.

In the filter device according to the aspect of the present invention, it is preferable that the filter body is arranged such that the surface provided with the air vent intersects the partitioning surface of the partition.

The filter device according to one aspect of the present invention further includes an opening arranged in parallel with the partition, the filter body is arranged with the vent facing in the vertical direction, and the opening is located in the filter body. is preferably located below the .

In the filter device according to the aspect of the present invention, it is preferable that the filter main body is provided with the air vent on a surface of the housing that has the maximum area.

In the filter device according to one aspect of the present invention, the switching mechanism has a first position that rockably supports the closing member and closes the ventilation port on one side of the filter body; It is preferable to switch the position of the closing member to a second position in which the vent is opened and the gas is allowed to flow inside the housing.

Preferably, the filter device according to the aspect of the present invention further includes an opening/closing lid that opens and closes the other vent of the filter body.

In the filter device according to the aspect of the present invention, it is preferable that the opening/closing lid is used to cover one of the open air vents of the filter body.

A filter device according to an aspect of the present invention preferably includes a filter unit having a frame that has the partition section, the closing member and the switching mechanism are attached, and the filter body is detachably installed. .

In order to achieve the above object, a filter device according to one aspect of the present invention includes a filter body having ventilation holes formed on two surfaces of a housing that houses a filter medium that captures fine particles of volcanic ash, and two regions: and an opening provided in parallel with the partition, wherein the filter body has a surface provided with the ventilation port on the partition It is arranged so as to intersect a plane that partitions the two regions at the part.

In the filter device according to the aspect of the present invention, it is preferable that the filter body is arranged with the air vent directed vertically, and the opening is arranged below the filter body.

In the filter device according to the aspect of the present invention, it is preferable that the filter main body is provided with the air vent on a surface of the housing that has the maximum area.

In order to achieve the above object, a filter switching method according to one aspect of the present invention includes a filter main body in which ventilation holes are formed on two surfaces of a housing that accommodates a filter medium, and a filter body that partitions the two areas. The filter body is provided with a partition part in which the filter body is detachably installed, an opening arranged in parallel with the partition part, and a closing member for preventing gas flow, and the filter body is provided with the ventilation port. A filter switching method using a filter device, in which the surface of the partition section intersects a surface that partitions the two regions, wherein the filter body is switched by switching the position of the closing member. and a second step of allowing gas to flow from the opening through each of the vents of the filter body.

In order to achieve the above object, a filter replacement method according to one aspect of the present invention includes a filter main body in which ventilation holes are formed on two surfaces of a housing that accommodates a filter medium, and a filter body that separates the two areas. The filter body is provided with a partition part in which the filter body is detachably installed, an opening arranged in parallel with the partition part, and a closing member for preventing gas flow, and the filter body is provided with the ventilation port. A filter replacement method using a filter device, in which the surface of the partition section intersects a surface that partitions the two regions, wherein the position of the closing member is switched to switch the filter body a first step of circulating the gas to the opening without passing through each of the vents; and a second step of circulating the gas from the opening through the vents of the filter body, In the second step, the filter body is attached and detached after blocking the flow of gas through each of the vents with an opening/closing cover that covers the vent of the filter body.

According to the present invention, when there is no need to capture target fine particles contained in the gas, the closing member is arranged to allow the gas to flow only through the opening. On the other hand, when it is necessary to capture target fine particles contained in the gas, the closing member is arranged to allow the gas to flow from the opening through the ventilation ports of the filter body. Therefore, according to the present invention, the filter body can be made to function simply by switching the position of the closing member, without performing the mounting work of the filter body. As a result, according to the present invention, the filter body can be protected when not in use, and the filter body can easily function when in use.

FIG. 1 is a schematic configuration diagram of a filter device according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing a filter unit of the filter device according to the embodiment of the invention. FIG. 3 is a perspective view showing a filter unit of the filter device according to the embodiment of the invention. FIG. 4 is a perspective view showing a filter unit of the filter device according to the embodiment of the invention. FIG. 5 is a schematic configuration diagram showing the switching state of the filter device according to the embodiment of the present invention. FIG. 6 is a vertical cross-sectional view showing a switching state of the filter device according to the embodiment of the present invention. FIG. 7 is a perspective view showing a switching state of the filter device according to the embodiment of the present invention. FIG. 8 is a perspective view showing a switching state of the filter device according to the embodiment of the present invention. FIG. 9 is a longitudinal sectional view showing a replacement state of the filter body in the filter device according to the embodiment of the present invention. FIG. 10 is a perspective view showing a replacement state of the filter body in the filter device according to the embodiment of the present invention. FIG. 11 is a perspective view showing a replacement state of the filter body in the filter device according to the embodiment of the present invention. FIG. 12 is a longitudinal sectional view showing a filter unit of another form of filter device according to the embodiment of the present invention. FIG. 13 is a longitudinal sectional view showing a switching state of another form of the filter device according to the embodiment of the present invention. FIG. 14 is a longitudinal sectional view showing a replacement state of the filter body in another form of the filter device according to the embodiment of the present invention.

EMBODIMENT OF THE INVENTION Below, embodiment which concerns on this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same.

[Embodiment 1]
FIG. 1 is a schematic configuration diagram of a filter device according to this embodiment. FIG. 2 is a longitudinal sectional view showing the filter unit of the filter device according to this embodiment. FIG. 3 is a perspective view showing the filter unit of the filter device according to this embodiment. FIG. 4 is a perspective view showing the filter unit of the filter device according to this embodiment. FIG. 5 is a schematic configuration diagram showing the switching state of the filter device according to this embodiment. FIG. 6 is a longitudinal sectional view showing a switching state of the filter device according to this embodiment. FIG. 7 is a perspective view showing a switching state of the filter device according to this embodiment. FIG. 8 is a perspective view showing a switching state of the filter device according to this embodiment.

As shown in FIG. 1, the filter device 1 of this embodiment is arranged in a passage surrounded by a ceiling 51, a floor 52 and both side walls 53, for example. The filter device 1 includes a filter body 2 , a partition portion 3 , an opening portion 4 , a closing member 5 , a switching mechanism 6 and an opening/closing lid 7 .

The partition part 3 is installed so that the filter main body 2 is detachable. The partition part 3 is located at the part where the filter body 2 is installed, and as shown in FIG. It is made of a plate material that separates the area S2 to which the gas in which the fine particles are trapped is sent by the filter body 2 . The area S2 partitioned by the partition part 3 is inside the facility building surrounded by the ceiling 51, the floor 52, and the side walls 53, and the area S1 is surrounded by the ceiling 51, the floor 52, and the side walls 53. It may be outside of the building where it is not installed. In addition, as shown in FIG. 1, the uppermost filter body 2 provided in a plurality vertically is provided with a space between it and the ceiling 51. It has an auxiliary partition portion 3' so as to partition S2.

The opening 4 communicates the region S1 and the region S2 in the partition 3 . The opening 4 is arranged side by side with the plate member of the partition 3 . Further, the opening 4 is arranged below the filter body 2 installed in the partition 3 .

The filter body 2, as shown in FIG. 2, has a housing 2A and a filter medium 2B. The housing 2A is a rectangular box, and is formed as a rectangular parallelepiped in this embodiment. The housing 2A has air vents 2Aa formed on two opposing surfaces, and the other surface is closed. The air vents 2Aa are formed in the upper and lower surfaces of the housing 2A. The filter medium 2B is housed inside the housing 2A and captures fine particles contained in the gas that passes through the inside of the housing 2A via the respective vents 2Aa. The filter medium 2B is, for example, a volcanic ash filter that captures fine particles of volcanic ash, is formed in a mesh shape, and is arranged along a direction that intersects the direction in which the vent holes 2Aa face each other. In addition, since the filter medium 2B is formed with wavy portions reciprocating in the direction in which the air holes 2Aa are opposed to each other, the efficiency of trapping fine particles is enhanced compared to the case where the filter medium 2B is formed flat. In addition to the volcanic ash filter, the filter medium 2B may be a coarse filter, a HEPA filter (High Efficiency Particulate Air Filter), or a ULPA filter (Ultra Low Penetration Air Filter). The filter main body 2 is provided with ventilation holes 2Aa on the upper surface and the lower surface of the largest area of the housing 2A, which is formed as a rectangular parallelepiped. The filter body 2 is arranged such that the surface provided with the vent 2Aa intersects the surface (the plate surface of the partition 3) that separates the area S1 and the area S2 in the partition 3. As shown in FIG. The filter main body 2 is arranged such that the surface not having the air vent 2</b>Aa faces the partition section 3 . The filter main body 2 is arranged such that the ventilation port 2</b>Aa is oriented in a different direction from the opening 4 . Therefore, the filter main body 2 is placed horizontally so that the air vent 2Aa and the opening 4 do not face in the same direction. As shown in FIGS. 1 and 5, a plurality of filter bodies 2 configured in this manner are provided vertically between the ceiling 51 and the floor 52 . Moreover, although not shown in the drawing, a plurality of filter bodies 2 may be provided between the side walls 53 .

The closing member 5 prevents the flow of gas. The closing member 5 is made of a plate material, and prevents the gas from flowing to the filter body 2 and allows the gas to flow only to the opening 4, or prevents the gas to flow only to the opening 4 to prevent the gas from flowing from the opening 4 to the filter body. 2 to circulate gas. 1 and 2, the closing member 5 blocks the ventilation port 2Aa on the lower surface (one side) of the filter body 2 to prevent the flow of gas to the filter body 2, and the opening 4 as indicated by the arrow A. The figure shows a form in which the gas is circulated only to the 5 and 6, the closing member 5 opens the ventilation port 2Aa on the lower surface of the filter body 2 to prevent the gas from flowing only through the opening 4, and the air flows through the filter body 2 as indicated by an arrow B. It shows a form in which gas is circulated.

A switching mechanism 6 switches the position of the closing member 5 . The switching mechanism 6 switches the position of the closing member 5 to prevent the gas from flowing to the filter body 2 and to allow the gas to flow only through the opening 4, or to prevent the gas from flowing to the opening 4 only. It is possible to prevent the gas from circulating and allow the gas to circulate through the filter main body 2 . In the filter device 1 of the present embodiment, the switching mechanism 6 has a swing shaft 6A, as shown in FIGS. The position of the member 5 is switched.

The opening/closing lid 7 opens and closes the vent hole 2Aa on the upper surface (the other side) of the filter body 2 . The open/close lid 7 is made of a plate material and covers the vent 2Aa to open and close the vent 2Aa. The opening/closing lid 7 is also configured to be able to open and close the air vent 2Aa on the lower surface (one side) of the filter body 2 .

In the filter device 1 of this embodiment, the filter body 2 , the partition portion 3 , the opening portion 4 , the closing member 5 , the switching mechanism 6 , and the open/close lid 7 are configured as a filter unit 10 in the above configuration.

The filter unit 10 has a frame 11 as shown in FIGS. 2-4 and 6-8. The frame 11 has rectangular side plates 11A on both sides.

Partitions 3 are provided between the side plates 11A. The partition portion 3 partitions the space between the side plates 11A into a region S1 and a region S2. The partition part 3 is provided at the end of the area S1 side between the side plates 11A, at a substantially upper half position.

An opening 4 is provided between each side plate 11A. The opening 4 is provided on the lower side of the partition 3 and at a substantially lower half position between the side plates 11A.

A filter body 2 is provided between the side plates 11A. The filter main body 2 is provided on the side of the area S2 partitioned by the partition portion 3 . The filter main body 2 is inserted between the side plates 11A from the area S2 side of the partition section 3 and is supported by the support section 11B so as to be pulled out from the partition section 3 to the area S2 side. As described above, the filter main body 2 is provided with the air vents 2Aa on the upper surface and the lower surface having the largest area of the housing 2A formed as a rectangular parallelepiped. The support portion 11B supports the filter body 2 so as to open the vent hole 2Aa on the lower surface. Further, the filter body 2 is installed with the side having no air vent 2Aa facing the partition section 3 . Further, the filter body 2 is provided with a handle 2</b>C on the surface of the area S<b>2 side opposite to the partition portion 3 . Therefore, by gripping the handle 2C, the filter body 2 is inserted between the side plates 11A from the area S2 side of the partition section 3 and extracted to the area S2 side of the partition section 3. As shown in FIG.

A closing member 5 is provided between the side plates 11A. The closing member 5 is arranged horizontally at a position below the filter body 2, as shown in FIG. The end of the closing member 5 on the side of the region S1 is in close contact with the covering portion 11C in a horizontal state. The covering portion 11C is continuously provided downward from the lower end of the partition portion 3 and extends between the side plates 11A. The end of the closing member 5 in the horizontal state on the side of the region S1 is in close contact with the covering portion 11C, so that the closing member 5 divides the space between the side plates 11A into the partition portion 3 side and the opening portion 4 side, and divides the filter main body. By covering the lower side of the filter 2, the flow of gas from the opening 4 side to the filter body 2 is prevented. Therefore, the closing member 5 allows the gas to flow only to the lower portion having the opening 4 between the side plates 11A, as indicated by the arrow A in FIG.

A switching mechanism 6 is provided between the side plates 11A. The switching mechanism 6 has a swing shaft 6A. The swing shaft 6A is arranged horizontally between the side plates 11A at the end on the side of the region S2 between the side plates 11A. The rocking shaft 6A is provided at the end of the closing member 5 on the region S2 side, and as shown in FIG. 5, and an inclined state in which the end of the closing member 5 on the side of the region S1 is separated from the covering portion 11C and the closing member 5 is obliquely arranged as shown in FIG. The switching mechanism 6 has an inclined support portion 6B so as to support the oblique arrangement of the closing member 5 as an inclined state. The inclined support portion 6B is provided with a through hole 6Ba, and the through hole 6Ba provides an opening 4 between the side plates 11A as indicated by an arrow A in FIG. 2 when the closing member 5 is in a horizontal state. Allow gas to flow only to the lower part. Although not shown in the drawings, the switching mechanism 6 has a horizontal support portion that supports the horizontal state of the closing member 5 . The horizontal support portion may be, for example, one that locks the end of the closing member 5 on the side of the region S1 to the side of the covering portion 11C, and a hook, a magnet, or the like can be applied.

An opening/closing lid 7 is provided between each side plate 11A. As shown in FIGS. 1 to 4 , the opening/closing lid 7 is horizontally arranged along the top surface of the filter body 2 and closes the air vent 2Aa on the top surface of the filter body 2 . The opening/closing lid 7 is inserted between the side plates 11A from the region S2 side of the partition portion 3 and supported so as to be pulled out to the region S2 side of the partition portion 3. As shown in FIG. As shown in FIGS. 3 and 4, the opening/closing lid 7 has a handle 7A on the surface on the side of the region S2, which is the opposite side to the partition portion 3. As shown in FIGS. Therefore, the open/close lid 7 is inserted between the side plates 11A from the area S2 side of the partition section 3 and extracted to the area S2 side of the partition section 3 by grasping the handle 7A. The opening/closing lid 7 is horizontally arranged along the lower surface of the filter body 2, and is placed between the side plates 11A from the region S2 side of the partition section 3 so as to close the ventilation port 2Aa on the lower surface of the filter body 2. It is inserted and supported so as to be pulled out to the region S2 side of the partition section 3 .

The filter unit 10 has an airtight mechanism 8 between each side plate 11A. The airtight mechanism 8 maintains airtightness between the support portion 11B that supports the filter body 2 and the closing member 5 at the end of each side plate 11A on the side of the region S2. The airtight mechanism 8 includes a first airtight plate 8A that extends below the support portion 11B and is always airtight with the support portion 11B at the end of each side plate 11A on the region S2 side. , and a second airtight plate 8B that extends above the closing member 5 and is always airtight with the closing member 5 . The first airtight plate 8A is provided swingably around a shaft 8C provided between the side plates 11A with respect to the support portion 11B. Further, the first airtight plate 8A is airtightly adhered to the second airtight plate 8B during its swinging motion. Therefore, the airtight mechanism 8 can maintain the airtightness between the support portion 11B and the closing member 5 at the end of each side plate 11A on the side of the region S2.

In this filter unit 10, a frame 11 is detachably attached to a ceiling 51, a floor 52, a side wall 53, or the like between a region S1 and a region S2.

In addition, the filter unit 10 is not limited to the configuration in which one filter body 2 is provided on the frame 11 , and may have a configuration in which a plurality of filter bodies 2 are provided on the frame 11 .

In the filter device 1 configured in this manner, for example, when there is no target fine particle in the gas in the region S1, as shown in FIGS. Cover the bottom of 2. Therefore, during normal operation, the filter device 1 prevents gas from flowing from the opening 4 side to the filter body 2, and as indicated by the arrow A in FIGS. The gas is allowed to flow only through the opening 4 without passing through each of the vents 2Aa. In addition, the opening/closing lid 7 closes the vent hole 2Aa on the upper surface of the filter body 2. As shown in FIG. Therefore, in normal operation, the filter device 1 prevents dust in the gas from entering through the ventilation port 2</b>Aa on the upper surface of the filter body 2 . In addition, when a plurality of filter bodies 2 (filter units 10) are arranged vertically, the opening/closing lid 7 closes the air vent 2Aa on the upper surface, thereby opening between the filter bodies 2 (filter units 10) arranged on the upper side. The gas is allowed to flow only through the portion 4 .

On the other hand, for example, when there is an abnormality in which target fine particles (eg, volcanic ash) are present in the gas in the region S1 due to a volcanic eruption, etc., as shown in FIGS. Open the air vent 2Aa on the upper surface of the . Also, the switching mechanism 6 causes the closing member 5 to be tilted. Therefore, in the event of an abnormality, the filter device 1 prevents the gas from flowing only to the lower portion having the opening 4 by the slanted closing member 5, as indicated by the arrow B in FIGS. Furthermore, the gas is allowed to flow through the filter body 2 from the region S1 to the region S2. In this case, the air passes through the filter main body 2 from the ventilation port 2Aa on the bottom surface to the ventilation port 2Aa on the top surface. Therefore, in the event of an abnormality, the filter device 1 can capture fine particles present in the gas with the filter body 2 .

Hereinafter, replacement of the filter body 2 in the filter device 1 described above will be described.

FIG. 9 is a longitudinal sectional view showing a replacement state of the filter body in the filter device according to this embodiment. FIG. 10 is a perspective view showing a replacement state of the filter body in the filter device according to this embodiment. FIG. 11 is a perspective view showing a replacement state of the filter body in the filter device according to this embodiment.

When replacing the filter body 2, as shown in FIGS. 9 and 10, in the filter device 1, the opening/closing lid 7 is horizontally arranged along the bottom surface of the filter body 2, and the ventilation port 2Aa on the bottom surface of the filter body 2 is opened. Block. Here, in the airtight mechanism 8, the opening/closing lid 7 is in close contact with the second airtight plate 8B which is always airtight with the closing member 5. As shown in FIG. Therefore, in the filter device 1, the oblique closing member 5 prevents the gas from flowing only to the lower portion having the opening 4, and the opening/closing lid 7 allows the gas to flow through the filter main body 2. Also prevent That is, the filter device 1 prevents gas from passing from the region S1 to the region S2. In this state, as shown in FIGS. 9 and 11, the handle 2C of the filter body 2 is grasped and pulled out to the area S2 side. After that, a new filter body 2 is inserted from the area S2 side, the opening/closing lid 7 is removed, and the state shown in FIGS. 5 and 6 is restored. In this way, when replacing the filter body 2, the filter device 1 prevents gas from passing from the region S1 to the region S2, and in this state, the filter body 2 is replaced from the region S2 side. .

As described above, the filter device 1 of the present embodiment includes a filter main body 2 in which ventilation holes 2Aa are formed on two surfaces of a housing 2A that accommodates a filter medium 2B, and a partition section 3 in which the filter main body 2 is detachably installed. A switching mechanism that switches the position of the closing member 5 that prevents the flow of gas to allow the gas to circulate without passing through the ventilation ports 2Aa of the filter body 2, while allowing the gas to flow through the ventilation ports 2Aa of the filter body 2. 6 and .

According to the filter device 1 of the present embodiment, when there is no need to trap the target fine particles contained in the gas, the closing member 5 is arranged to allow the gas to flow without passing through the air vents 2Aa of the filter body 2 . On the other hand, when it is necessary to capture the target fine particles contained in the gas, the closing member 5 is arranged to allow the gas to flow through the ventilation holes 2Aa of the filter body 2 . Therefore, according to the filter device 1 of the present embodiment, the filter body 2 can be made to function simply by switching the position of the closing member 5 without performing the mounting work of the filter body 2 . As a result, according to the filter device 1 of the present embodiment, the filter body 2 can be protected when not in use, and the filter body 2 can be easily made to function when in use.

In addition, in the filter device 1 of the present embodiment, the filter body 2 is arranged horizontally so that the surface provided with the air vent 2Aa intersects the surface of the partition 3 that separates the two regions S1 and S2. ing.

According to the filter device 1 of the present embodiment, the filter body 2 is horizontally arranged so that the surface having the air vent 2Aa intersects the surface that partitions the regions S1 and S2. The opening area of the vent 2Aa can be increased without being restricted by the opening areas of the openings 4 arranged side by side. As a result, according to the filter device 1 of the present embodiment, the wind speed of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 can be further improved.

In addition, in the filter device 1 of the present embodiment, the filter body 2 is arranged with the air vent 2Aa directed vertically, and the opening 4 is arranged below the filter body 2 .

According to the filter device 1 of this embodiment, the gas passing through the filter body 2 through the opening 4 passes through the filter body 2 from the bottom to the top. As a result, according to the filter device 1 of the present embodiment, clogging of the filter material 2B of the filter body 2 can be suppressed, and the function of the filter body 2 can be continued for a longer period of time.

In addition, in the filter device 1 of the present embodiment, the filter main body 2 is provided with the ventilation port 2Aa on the surface of the housing 2A that has the maximum area.

According to the filter device 1 of the present embodiment, the opening area of the vent 2Aa can be increased. As a result, according to the filter device 1 of the present embodiment, the wind speed of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 can be further improved.

In addition, in the filter device 1 of the present embodiment, the switching mechanism 6 supports the closing member 5 so as to be able to swing, closes the air vent 2</b>Aa on one side of the filter body 2 , and allows the gas to flow only through the opening 4 . The position of the closing member 5 is switched between one position and a second position in which one ventilation port 2Aa of the filter main body 2 is opened and the gas is circulated from the opening 4 to the inside of the housing 2A.

According to the filter device 1 of the present embodiment, by swinging and changing the position of the closing member 5 by the switching mechanism 6, the flow of gas only through the opening 4 and the flow of gas from the opening 4 to the filter main body 2 are achieved. distribution and can be easily switched.

In addition, the filter device 1 of the present embodiment further includes an opening/closing lid 7 for opening/closing the other vent 2Aa of the filter body 2 .

According to the filter device 1 of the present embodiment, when the closing member 5 is set to the first position and one of the air vents of the filter body 2 is closed, the opening/closing lid 7 closes the other air vent 2Aa of the filter body 2. This prevents gas from flowing to the filter body 2 . Further, when one ventilation port 2Aa of the filter body 2 is opened by setting the closing member 5 to the second position, by removing the open/close lid 7 and opening the other ventilation port 2Aa of the filter body 2, of gas flow. As a result, according to the filter device 1 of the present embodiment, the filter body 2 can be protected when not in use, and the filter body 2 can be easily made to function when in use.

In addition, in the filter device 1 of the present embodiment, the opening/closing lid 7 is used to cover one air vent 2Aa of the filter main body 2 that is open.

According to the filter device 1 of the present embodiment, by covering one of the air vents 2Aa of the filter body 2 that is open, the flow of gas to the filter body 2 is prevented and the filter body 2 can be replaced. As a result, according to the filter device 1 of the present embodiment, the opening/closing lid 7 can be used for replacing the filter body 2 .

In addition, in the filter device 1 of the present embodiment, the filter unit 10 has the frame 11 which has the opening 4 and the partition 3, the closing member 5 and the switching mechanism 6 are attached, and the filter main body 2 is detachably installed. Prepare.

According to the filter device 1 of the present embodiment, since the filter unit 10 is provided, it is possible to install or replace the filter unit 10 as a unit, and the construction of the filter device 1 can be performed easily.

By the way, in the above-described filter device 1, the filter body 2 in which the air vents 2Aa are formed on the two surfaces of the housing 2A that houses the filter material 2B that captures the fine particles of the volcanic ash, and the two regions S1 and S2 are provided as partitions. The filter body 2 includes a partition 3 in which the filter body 2 is detachably installed, and an opening 4 provided in parallel with the partition 3. It is arranged horizontally so as to intersect a plane separating the two regions S1 and S2.

According to the filter device 1 of the present embodiment, the filter body 2 for trapping volcanic ash is arranged horizontally so that the surface having the air vent 2Aa intersects the surface that partitions the regions S1 and S2. The opening area of the vent 2Aa can be increased without being restricted by the opening area of the openings 4 arranged side by side in the partition section 3 . As a result, according to the filter device 1 of the present embodiment, the wind speed of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 to trap volcanic ash can be further improved.

In addition, in the filter device 1 of the present embodiment, the filter body 2 for trapping volcanic ash is arranged with the air vent 2Aa directed vertically, and the opening 4 is arranged below the filter body 2 .

According to the filter device 1 of this embodiment, the gas passing through the filter body 2 through the opening 4 passes through the filter body 2 from the bottom to the top. As a result, according to the filter device 1 of the present embodiment, clogging of the filter material 2B of the filter body 2 with volcanic ash can be suppressed, and the function of the filter body 2 can be continued for a longer period of time.

In addition, in the filter device 1 of the present embodiment, the filter main body 2 for trapping volcanic ash is provided with the ventilation port 2Aa on the surface of the housing 2A that has the maximum area.

According to the filter device 1 of the present embodiment, the opening area of the vent 2Aa can be increased. As a result, according to the filter device 1 of the present embodiment, the wind speed of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 to trap volcanic ash can be further improved.

Further, the filter switching method of the present embodiment includes a filter main body 2 in which ventilation holes 2Aa are formed on two surfaces of a housing 2A that accommodates a filter medium 2B, and a filter main body 2 that is provided by partitioning two regions S1 and S2. is detachably installed, an opening 4 provided in parallel with the partition 3, and a closing member 5 for preventing gas flow, and the filter body 2 is provided with a vent 2Aa. Using the filter device 1 that is horizontally arranged so that the surface of the partition section 3 intersects the surface that partitions the two regions S1 and S2, the position of the closing member 5 is switched, and each of the filter main bodies 2 A first step of circulating the gas through the openings 4 without passing through the vents 2Aa and a second step of circulating the gas from the openings 4 through the vents 2Aa of the filter body 2 are included.

According to the filter switching method of the present embodiment, when there is no need to capture the target fine particles contained in the gas, the closing member 5 is arranged to allow the gas to flow only through the opening 4 . On the other hand, when it is necessary to capture target fine particles contained in the gas, the closing member 5 is arranged to allow the gas to flow from the opening 4 through the ventilation holes 2Aa of the filter body 2 . Therefore, according to the filter switching method of the present embodiment, the filter body 2 can be made to function simply by switching the position of the closing member 5 without performing the mounting work of the filter body 2 . As a result, according to the filter switching method of the present embodiment, the filter body 2 can be protected when not in use, and the filter body 2 can be easily made to function when in use.

Further, the filter replacement method of the present embodiment includes a filter main body 2 in which ventilation holes 2Aa are formed on two surfaces of a housing 2A that accommodates a filter medium 2B, and a filter main body 2 that is provided by partitioning two regions S1 and S2. is detachably installed, an opening 4 provided in parallel with the partition 3, and a closing member 5 for preventing gas flow, and the filter body 2 is provided with a vent 2Aa. Using the filter device 1 that is horizontally arranged so that the surface of the partition section 3 intersects the surface that partitions the two regions S1 and S2, the position of the closing member 5 is switched, and each of the filter main bodies 2 A first step of circulating the gas to the opening 4 without passing through the vent 2Aa, and a second step of circulating the gas from the opening 4 through the vent 2Aa of the filter body 2. In the second step, Then, the filter body 2 is attached and detached after blocking the flow of gas through each ventilation port 2Aa with the opening/closing cover 7 covering the ventilation port 2Aa of the filter body 2 .

According to the filter replacement method of the present embodiment, by blocking the ventilation port 2Aa of the filter body 2, the flow of gas to the filter body 2 is prevented, and the filter body 2 can be replaced. As a result, according to the filter replacement method of the present embodiment, the filter body 2 can be replaced without switching the position of the closing member 5 while preventing gas from flowing between the regions S1 and S2.

[Embodiment 2]
Another form of the filter device 101 will be described below.

FIG. 12 is a longitudinal sectional view showing a filter unit of another form of filter device according to the present embodiment. FIG. 13 is a vertical cross-sectional view showing a switching state of another form of the filter device according to the present embodiment.

In the filter unit 110 of the filter device 101 described below, the same parts as those of the filter unit 10 of the filter device 1 described above are denoted by the same reference numerals, and the description thereof is omitted.

Filter device 101 is arranged, for example, in a passage surrounded by ceiling 51, floor 52, and side walls 53 shown in FIG. The filter device 101 includes a filter body 2 , a partition portion 3 , an opening portion 4 , a closing member 105 , a switching mechanism 106 and an opening/closing lid 7 .

Closing member 105 prevents the flow of gas. The closing member 105 is made of a plate material, and prevents the gas from flowing to the filter body 2 and allows the gas to flow only to the opening 4, or prevents the gas to flow only to the opening 4 and allows the gas to flow from the opening 4 to the filter body. 2 to circulate gas. In the filter device 101 (filter unit 110), as shown in FIG. 12, the closing member 105 closes the air vent 2Aa on the upper surface (one side) of the filter main body 2 (not shown) arranged on the lower side to prevent air from flowing into the filter main body 2. Prevent gas flow. At this time, as shown in FIG. 12, the opening/closing lid 7 closes the vent hole 2Aa on the lower surface (the other side) of the filter body 2. As shown in FIG. Therefore, as indicated by arrow C, the gas is allowed to flow only through the openings 4 . In the filter device 101 (filter unit 110), as shown in FIG. 13, the closing member 105 opens the air vent 2Aa on the upper surface (one side) of the filter body 2 (not shown) disposed on the lower side to open the opening. 4 prevents the flow of gas only. At this time, as shown in FIG. 13, the opening/closing lid 7 is removed to open the vent hole 2Aa on the lower surface (the other side) of the filter body 2. As shown in FIG. Therefore, as indicated by arrow D, the gas is allowed to flow from the opening 4 through the filter body 2 .

In the filter unit 110, the closing member 105 is provided between each side plate 11A. As shown in FIG. 12, the closing member 105 is horizontally arranged at the lower end of each side plate 11A. The end of the closing member 105 on the side of the region S1 is in close contact with the covering portion 11D in a horizontally arranged horizontal state. The covering portion 11D is provided between the side plates 11A at the lower ends of the side plates 11A. The end of the horizontal closing member 105 on the side of the region S1 is in close contact with the covering portion 11D, so that the closing member 105 closes the lower end between the side plates 11A, and the upper surface of the filter body 2 (not shown) arranged on the lower side. By covering the (one) air vent 2Aa and arranging the opening/closing lid 7, the flow of gas from the opening 4 side to the filter main body 2 is prevented. Therefore, the closing member 105 allows the gas to flow only to the lower portion having the opening 4 between the side plates 11A, as indicated by arrow C in FIG.

A switching mechanism 106 switches the position of the closing member 105 . The switching mechanism 106 switches the position of the closing member 105 so that the closing member 105 is configured to prevent gas from flowing to the filter body 2 and allow gas to flow only through the opening 4, or to prevent gas from flowing only through the opening 4. It is possible to prevent the gas from circulating and allow the gas to circulate through the filter main body 2 . In the filter device 101 of the present embodiment, the switching mechanism 106 has a swing shaft 106A as shown in FIGS. The position of the member 105 is switched.

In the filter unit 110, the switching mechanism 106 is provided between the side plates 11A. The switching mechanism 106 has a swing shaft 106A. The swing shaft 106A is horizontally arranged between the side plates 11A at the lower end on the region S1 side and between the side plates 11A. The rocking shaft 106A is provided at the end of the closing member 105 on the region S1 side, and as shown in FIG. 12, the closing member 105 is horizontal, and as shown in FIG. The position of the closing member 105 is switched between an inclined state in which the end is in close contact with the second airtight plate 8B of the airtight mechanism 8 and the closing member 105 is obliquely arranged. Although not shown in the drawing, the switching mechanism 106 has a horizontal support portion and an inclined support portion that support the horizontal state and the inclined state of the closing member 105 . The horizontal support portion and the inclined support portion may be, for example, hooks, magnets, or the like, as long as they lock the end of the closing member 105 on the region S2 side.

In this filter unit 110, the frame 11 is detachably attached to the ceiling 51, the floor 52, the side wall 53, etc. between the area S1 and the area S2.

Note that the filter unit 110 is not limited to the configuration in which one filter body 2 is provided on the frame 11 , and may have a configuration in which a plurality of filter bodies 2 are provided on the frame 11 .

In the filter device 101 configured in this way, for example, when there is no target fine particle in the gas in the region S1, as shown in FIG. The top of the filter body 2 is covered, and the opening/closing lid 7 covers the bottom of the filter body 2. - 特許庁Therefore, during normal operation, the filter device 101 prevents the flow of gas from the opening 4 side to the filter body 2, and as indicated by the arrow C in FIG. The gas is allowed to flow only through the opening 4 without passing through the vent 2Aa. Therefore, during normal operation, the filter device 101 prevents dust in the gas from entering through the ventilation port 2</b>Aa on the upper surface of the filter body 2 .

On the other hand, for example, when there is an abnormality in which target fine particles (for example, volcanic ash) are present in the gas in the region S1 due to a volcanic eruption or the like, as shown in FIG. Open the air vent 2Aa. Also, the closing member 105 is tilted by the switching mechanism 106 . Therefore, in the event of an abnormality, the filter device 101 prevents the gas from circulating only in the lower portion having the opening 4 by means of the slanted closing member 105, and as indicated by the arrow D in FIG. Gas is allowed to flow through the filter body 2 from S1 to region S2. In this case, the air passes through the filter main body 2 from the ventilation port 2Aa on the bottom surface to the ventilation port 2Aa on the top surface. Therefore, in the event of an abnormality, the filter device 101 can capture fine particles present in the gas with the filter body 2 .

Hereinafter, replacement of the filter body 2 in the filter device 101 described above will be described.

FIG. 14 is a vertical cross-sectional view showing a replacement state of the filter body in another form of the filter device according to the present embodiment.

When replacing the filter body 2, the filter device 101 has the opening/closing lid 7 arranged horizontally along the bottom surface of the filter body 2 to close the vent hole 2Aa on the bottom surface of the filter body 2, as shown in FIG. Here, in the airtight mechanism 8, the opening/closing lid 7 is in close contact with the second airtight plate 8B that is always airtight with the closing member 105. As shown in FIG. For this reason, the filter device 101 prevents the gas from circulating only in the lower portion having the opening 4 by the oblique closing member 105, and allows the gas to circulate through the filter body 2 by the opening/closing lid 7. Also prevent That is, the filter device 101 prevents gas from passing from the region S1 to the region S2. In this state, the handle 2C of the filter body 2 is grasped and pulled out toward the area S2. After that, a new filter main body 2 is inserted from the area S2 side, the opening/closing lid 7 is removed, and the state shown in FIG. 13 is restored. In this way, when the filter body 2 is replaced, the filter device 101 prevents gas from passing from the region S1 to the region S2, and in this state, the filter body 2 is replaced from the region S2 side. .

As described above, the filter device 101 of the present embodiment includes a filter main body 2 in which the air vents 2Aa are formed on two sides of the housing 2A that accommodates the filter medium 2B, and a partition section 3 in which the filter main body 2 is detachably installed. A switching mechanism that switches the position of the closing member 105 that prevents the flow of gas to allow the gas to flow without passing through the air vents 2Aa of the filter body 2, while allowing the air to flow through the air vents 2Aa of the filter body 2. 106;

According to the filter device 101 of the present embodiment, the closing member 105 is arranged to allow the gas to flow without passing through the air vents 2Aa of the filter main body 2 when there is no need to capture target fine particles contained in the gas. On the other hand, when it is necessary to capture the target fine particles contained in the gas, the closing member 105 is arranged to allow the gas to flow through the ventilation holes 2Aa of the filter body 2 . Therefore, according to the filter device 101 of the present embodiment, the filter body 2 can be made to function simply by switching the position of the closing member 105 without performing the mounting work of the filter body 2 . As a result, according to the filter device 101 of the present embodiment, the filter body 2 can be protected when not in use, and the filter body 2 can be easily made to function when in use.

In addition, in the filter device 101 of the present embodiment, the filter body 2 is arranged horizontally so that the surface provided with the air vent 2Aa intersects the surface of the partition 3 that separates the two regions S1 and S2. ing.

According to the filter device 101 of the present embodiment, the filter body 2 is horizontally arranged so that the surface having the air vent 2Aa intersects the surface that partitions the regions S1 and S2. The opening area of the vent 2Aa can be increased without being restricted by the opening areas of the openings 4 arranged side by side. As a result, according to the filter device 101 of the present embodiment, the wind speed of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 can be further improved.

In addition, in the filter device 101 of the present embodiment, the filter body 2 is arranged with the air vent 2Aa directed vertically, and the opening 4 is arranged below the filter body 2 .

According to the filter device 101 of this embodiment, the gas passing through the filter body 2 through the opening 4 passes through the filter body 2 from the bottom to the top. As a result, according to the filter device 101 of the present embodiment, clogging of the filter material 2B of the filter body 2 can be suppressed, and the function of the filter body 2 can be continued for a longer period of time.

In addition, in the filter device 101 of the present embodiment, the filter main body 2 is provided with the air vent 2Aa on the surface that forms the maximum area of the housing 2A.

According to the filter device 101 of this embodiment, the opening area of the vent 2Aa can be increased. As a result, according to the filter device 101 of the present embodiment, the wind speed of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 can be further improved.

In addition, in the filter device 101 of the present embodiment, the switching mechanism 106 supports the closing member 105 so as to be able to swing, closes the air vent 2</b>Aa on one side of the filter body 2 , and allows the gas to flow only through the opening 4 . The position of the closing member 105 is switched between one position and a second position in which one ventilation port 2Aa of the filter body 2 is opened and the gas is circulated from the opening 4 to the inside of the housing 2A.

According to the filter device 101 of the present embodiment, by swinging and changing the position of the closing member 105 by the switching mechanism 106, the flow of gas only through the opening 4 and the flow of gas from the opening 4 to the filter main body 2 are achieved. distribution and can be easily switched.

Further, the filter device 101 of the present embodiment further includes an opening/closing lid 7 that opens and closes the other vent 2Aa of the filter body 2 .

According to the filter device 101 of the present embodiment, when the closing member 105 is set to the first position and one of the air vents of the filter body 2 is closed, the opening/closing lid 7 closes the other air vent 2Aa of the filter body 2. This prevents gas from flowing to the filter body 2 . Further, when one ventilation port 2Aa of the filter body 2 is opened by setting the closing member 105 to the second position, by removing the open/close lid 7 and opening the other ventilation port 2Aa of the filter body 2, of gas flow. As a result, according to the filter device 101 of this embodiment, the filter body 2 can be protected when not in use, and the filter body 2 can be easily made to function when in use.

Further, in the filter device 101 of the present embodiment, the filter unit 110 has the frame 11 which has the opening 4 and the partition 3, the closing member 105 and the switching mechanism 106 are attached, and the filter main body 2 is detachably installed. Prepare.

According to the filter device 101 of the present embodiment, since the filter unit 110 is provided, it is possible to install or replace each filter unit 110, and the filter device 101 can be easily constructed.

By the way, in the above-described filter device 101, the filter body 2 in which the ventilation holes 2Aa are formed on two surfaces of the housing 2A that houses the filter medium 2B that captures the fine particles of the volcanic ash, and the two regions S1 and S2 are provided as partitions. The filter body 2 includes a partition 3 in which the filter body 2 is detachably installed, and an opening 4 provided in parallel with the partition 3. It is arranged horizontally so as to intersect a plane separating the two regions S1 and S2.

According to the filter device 101 of the present embodiment, the filter body 2 that traps volcanic ash is arranged horizontally so that the surface having the vent 2Aa intersects the surface that partitions the regions S1 and S2. The opening area of the vent 2Aa can be increased without being restricted by the opening area of the openings 4 arranged side by side in the partition section 3 . As a result, according to the filter device 101 of the present embodiment, the wind velocity of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 to trap volcanic ash can be further improved.

In addition, in the filter device 101 of the present embodiment, the filter body 2 for trapping volcanic ash is arranged with the air vent 2Aa directed vertically, and the opening 4 is arranged below the filter body 2 .

According to the filter device 101 of this embodiment, the gas passing through the filter body 2 through the opening 4 passes through the filter body 2 from the bottom to the top. As a result, according to the filter device 101 of the present embodiment, clogging of the filter media 2B of the filter body 2 with volcanic ash can be suppressed, and the function of the filter body 2 can be continued for a longer period of time.

In addition, in the filter device 101 of the present embodiment, the filter main body 2 for trapping volcanic ash is provided with the ventilation port 2Aa on the surface of the housing 2A having the maximum area.

According to the filter device 101 of this embodiment, the opening area of the vent 2Aa can be increased. As a result, according to the filter device 101 of the present embodiment, the wind velocity of the gas passing through the filter body 2 can be suppressed, and the function of the filter body 2 to trap volcanic ash can be further improved.

Further, the filter switching method of the present embodiment includes a filter main body 2 in which ventilation holes 2Aa are formed on two surfaces of a housing 2A that accommodates a filter medium 2B, and a filter main body 2 that is provided by partitioning two regions S1 and S2. is detachably installed, an opening 4 arranged in parallel with the partition 3, and a closing member 105 for preventing gas flow, and the filter body 2 is provided with a vent 2Aa. Using the filter device 101 that is horizontally arranged so that the surface of the partition section 3 intersects the surface that partitions the two regions S1 and S2, the position of the closing member 105 is switched to allow each of the filter main body 2 A first step of circulating the gas through the openings 4 without passing through the vents 2Aa and a second step of circulating the gas from the openings 4 through the vents 2Aa of the filter body 2 are included.

According to the filter switching method of the present embodiment, when there is no need to capture the target fine particles contained in the gas, the closing member 105 is arranged to allow the gas to flow only through the opening 4 . On the other hand, when it is necessary to capture the target fine particles contained in the gas, the closing member 105 is arranged to allow the gas to flow from the opening 4 through the ventilation holes 2Aa of the filter body 2 . Therefore, according to the filter switching method of the present embodiment, the filter body 2 can be made to function simply by switching the position of the closing member 105 without performing the mounting work of the filter body 2 . As a result, according to the filter switching method of the present embodiment, the filter body 2 can be protected when not in use, and the filter body 2 can be easily made to function when in use.

Further, the filter replacement method of the present embodiment includes a filter main body 2 in which ventilation holes 2Aa are formed on two surfaces of a housing 2A that accommodates a filter medium 2B, and a filter main body 2 that is provided by partitioning two regions S1 and S2. is detachably installed, an opening 4 arranged in parallel with the partition 3, and a closing member 105 for preventing gas flow, and the filter body 2 is provided with a vent 2Aa. Using the filter device 101 that is horizontally arranged so that the surface of the partition section 3 intersects the surface that partitions the two regions S1 and S2, the position of the closing member 105 is switched to allow each of the filter main body 2 A first step of circulating the gas to the opening 4 without passing through the vent 2Aa, and a second step of circulating the gas from the opening 4 through the vent 2Aa of the filter body 2. In the second step, Then, the filter body 2 is attached and detached after blocking the flow of gas through each ventilation port 2Aa with the opening/closing cover 7 covering the ventilation port 2Aa of the filter body 2 .

According to the filter replacement method of the present embodiment, by blocking the ventilation port 2Aa of the filter body 2, the flow of gas to the filter body 2 is prevented, and the filter body 2 can be replaced. As a result, according to the filter replacement method of the present embodiment, the filter main body 2 can be replaced without switching the position of the closing member 105 and preventing gas from flowing between the regions S1 and S2.

Reference Signs List 1, 101 filter device 2 filter body 2A housing 2Aa vent 2B filter medium 3 partition 4 opening 5, 105 closing member 6, 106 switching mechanism 6A, 106A rocking shaft 7 open/close lid 10, 110 filter unit 11 frame S1, S2 area

Claims (10)

a filter body in which ventilation holes are formed on two surfaces of a housing containing the filter medium;
a partition section in which the filter body is detachably installed;
a closing member provided to prevent gas from flowing and to open and close one of the vents of the filter body;
an opening/closing lid provided so as to be able to open and close the other vent of the filter body;
Switching the position of the closing member to close one of the air vents of the filter body to allow gas to flow without passing through the filter body, and to open one of the air vents of the filter body to allow air to flow a mechanism;
with
When one of the air vents of the filter body is closed by the switching mechanism, the open/close lid closes the other air vent of the filter body, while the switching mechanism is used to close one of the air vents of the filter body. , wherein the open/close lid opens the other vent of the filter body when opening the filter device. 2. The filter device according to claim 1, wherein said filter body is arranged such that a surface provided with said vent intersects a partitioning surface of said partition. 2. The filter body further comprising an opening provided in parallel with the partition, wherein the filter body is arranged with the air vent directed vertically, and the opening is arranged on the lower side of the filter body. 3. The filter device according to 2. 4. The filter device according to any one of claims 1 to 3, wherein said filter main body is provided with said air vent on a surface forming the maximum area of said housing. The switching mechanism swingably supports the closing member, and has a first position that closes the ventilation port on one side of the filter body, and a first position that opens the ventilation port on one side of the filter body to open the inside of the housing. 5. The filter device according to any one of claims 1 to 4, wherein the position of the closure member is switched between a second position in which gas is circulated to and from the second position. 6. The filter device according to any one of claims 1 to 5, wherein the opening/closing lid is also used to cover one of the open air vents of the filter body. 7. The filter according to any one of claims 1 to 6 , further comprising a filter unit having a frame having the partition, to which the closing member and the switching mechanism are attached, and to which the filter body is detachably installed. Device. 8. The filter device according to any one of claims 1 to 7, wherein the filter body contains filter media that captures particulates of volcanic ash. A filter body in which ventilation holes are formed on two surfaces of a housing that accommodates a filter medium, a partition section that separates the two areas and in which the filter body is detachably installed, and a partition section that is arranged in parallel with the partition section. a closing member provided to prevent the flow of gas and capable of opening and closing one of the air vents of the filter body; and an opening/closing lid provided to be capable of opening and closing the other air vent of the filter body; wherein the filter main body is arranged so that the surface provided with the ventilation port intersects with the surface dividing the two areas in the partition section, using a filter device. hand,
One of the ventilation ports of the filter body is closed by the closing member, and the other ventilation port of the filter body is closed by the opening/closing cover, so that gas is supplied to the openings without passing through the ventilation ports of the filter body. a first step of circulating the filter body through the opening by opening one of the air vents of the filter body by the closing member and opening the other air vent of the filter body by the open/close lid; and a second step of circulating gas through each of the vents. A filter body in which ventilation holes are formed on two surfaces of a housing that accommodates a filter medium, a partition section that separates the two areas and in which the filter body is detachably installed, and a partition section that is arranged in parallel with the partition section. a closing member provided to prevent the flow of gas and capable of opening and closing one of the air vents of the filter body; and an opening/closing lid provided to be capable of opening and closing the other air vent of the filter body; wherein the filter main body is arranged so that the surface provided with the ventilation port intersects the surface separating the two areas in the partition section, the filter replacement method using a filter device hand,
One of the ventilation ports of the filter body is closed by the closing member, and the other ventilation port of the filter body is closed by the opening/closing cover, so that gas is supplied to the openings without passing through the ventilation ports of the filter body. a first step of circulating the filter body through the opening by opening one of the air vents of the filter body by the closing member and opening the other air vent of the filter body by the open/close lid; a second step of circulating gas through each of the vents;
In the second step, the filter replacement method includes attaching and detaching the filter main body after blocking the flow of gas through each of the vents with the opening /closing cover.

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