JP2006015213A - Apparatus for exchanging filter and exchange method of filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover for exchanging a filter in an air cleaning filter unit that prevents the entrapped dust from dispersing from a filter used, when the filter used is removed at the operation time to exchange the filter. <P>SOLUTION: The apparatus for exchanging filter 71 is used at the operation time to exchange the filter in the air cleaning filter unit 1 equipped with the filter 4 and a fixing frame 21. The filter 4 has a filter medium 41 to trap the dust and the like in air and a filter frame 42 to surround the peripheral fringe part of the filter medium 41. The filter fixing frame 21 fixes the peripheral fringe part of the filter frame 42. The apparatus 71 for exchanging the filter is constituted of a filter storing body 91 and a storing body fixing means 81. The filter storing body 91 has an entrance part 91a to form the opening to insert the filter 4 to be the object for the removal. The storing body fixing means 81 fits the entrance part 91a to the filter fixing frame 21 or the outside of the filter fixing frame 21 so that the filter 4 to be the object for the removal can be stored. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a filter replacement device and a filter replacement method, and in particular, a filter having a filter medium that captures dust in the air and a filter frame surrounding the periphery of the filter medium, and a filter fixing frame that fixes the periphery of the filter frame. The present invention relates to a filter replacement device and a filter replacement method for an air purification filter unit provided.

Conventionally, various air purifiers, air conditioners, ducts in buildings, and the like have been provided with air purifying filter units. Such an air purifying filter unit mainly includes a filter having a filter medium that captures dust and the like in the air and a filter frame that surrounds the peripheral edge of the filter medium, and an air purifier and an air for fixing the peripheral edge of the filter frame. And a filter fixing frame provided in a unit casing or a duct of the harmony device. And as a filter medium used for this air purification filter unit, HEPA, a high performance, and a medium performance filter are provided according to the degree of indoor cleanliness, and this filter is collected regularly or a collection of filters. It needs to be replaced when the dust performance deteriorates. This filter replacement operation is performed by attaching a new filter after removing the filter attached to the filter fixing frame. In filter units installed in medical facilities and factories, the filter captures dust containing bacteria and harmful chemical substances, so the removed filter is collected as medical and industrial waste. (For example, refer to Patent Document 1).
JP 2003-325593 A

  However, when removing a used filter during filter replacement work, dust trapped by the filter may be scattered, and filter replacement workers may inhale dust containing bacteria or harmful chemical substances. There is a risk of scattering in the air in the building. Moreover, in order to prevent dust from being scattered, the filter must be removed slowly, resulting in a problem that workability is reduced.

  An object of the present invention is to prevent trapped dust and the like from scattering from a used filter when the used filter is removed at the time of filter replacement work in the air purification filter unit.

  According to a first aspect of the present invention, a filter exchanging device includes a filter having a filter medium that captures dust and the like in the air and a filter frame that surrounds the peripheral edge of the filter medium, and a filter fixing frame that fixes the peripheral edge of the filter frame. A filter exchange device for an air purifying filter unit, comprising a filter storage body and a storage body fixing means. The filter storage body has an inlet portion that forms an opening into which a filter to be removed is inserted. The storage body fixing means attaches the inlet portion to the outside of the filter fixing frame or the filter fixing frame so that the filter to be removed can be stored.

  In this filter exchange device, the inlet portion of the filter storage body can be attached to the outside of the filter fixing frame or the filter fixing frame so that the filter to be removed can be stored using the storage body fixing means. It is possible to prevent dust and the like from being scattered when the filter is removed from the filter fixing frame during the filter replacement work of the air purification filter unit. This eliminates the possibility of filter replacement workers inhaling dust containing bacteria and harmful chemical substances, or scattering them into the air in the building, and improves the workability when removing the filter from the filter fixing frame. improves.

According to a second aspect of the present invention, in the filter replacement apparatus according to the first aspect of the present invention, the filter housing further includes a suction portion that forms an opening to which the suction apparatus can be connected. The suction unit is provided with an exhaust filter.
In this filter exchange device, since the suction portion and the exhaust filter are provided in the filter housing body, the atmospheric pressure in the filter housing body is externally reduced while preventing dust and the like from scattering from the filter housing body through the suction portion. It can be made lower than the atmospheric pressure to prevent dust and the like from scattering from the filter housing.

According to a third aspect of the present invention, in the filter replacement apparatus according to the second aspect, the filter housing further includes a spacer member in the vicinity of the exhaust filter.
Since this filter exchange device has a spacer member arranged in the vicinity of the exhaust filter, the filter is removed from the filter fixing frame while lowering the atmospheric pressure inside the filter housing with the suction device using the suction device. Even when the work is performed, the shape of the filter housing can be defined to some extent, and a space for housing the filter removed from the filter fixing frame can be secured in the filter housing. Moreover, since the space between the removed filter and the suction portion can be secured, scattering of dust and the like from the filter due to suction can be more effectively prevented.

A filter exchange device according to a fourth invention is the filter exchange device according to any one of the first to third inventions, wherein the filter storage body is attached to the outside of the filter fixing frame or the filter fixing frame, and is removed. It further has an operation unit that makes it possible to access the target filter.
In this filter exchange device, the filter holder is attached to the filter fixing frame or outside the filter fixing frame, and the filter is removed from the filter fixing frame and inserted into the filter holder through the operation unit. Can be easily performed. Here, as an operation part, there exists a glove-shaped part etc. which a filter exchange operator can put in a hand.

A filter exchange device according to a fifth aspect of the present invention is the filter exchange device according to any one of the first to third aspects, wherein the filter housing is made of a flexible material.
In this filter changer, since the filter housing is made of a flexible material, the filter is fixed to the filter using the flexibility of the filter housing with the inlet portion attached to the filter fixing frame or the outside of the filter fixing frame. Operations such as removal from the frame and insertion into the filter housing can be easily performed.

A filter exchange device according to a sixth invention is the filter exchange device according to any one of the first to fifth inventions, wherein the filter housing body is attached to the outside of the filter fixing frame or the filter fixing frame using the housing body fixing means. Thus, the filter further includes a filter removal mechanism for removing the filter from the filter fixing frame.
In this filter exchange device, the filter is removed from the filter fixing frame and collected in the filter storage body by attaching the filter storage body to the outside of the filter fixing frame or the filter fixing frame using the storage body fixing means. The operation of removing the filter from the filter fixing frame can be performed in a short time.

  A filter replacement method according to a seventh aspect of the present invention includes a filter having a filter medium that captures dust and the like in the air and a filter frame surrounding the periphery of the filter medium, and a filter fixing frame that fixes the periphery of the filter frame. A method for replacing a filter of an air cleaning filter unit, which is performed according to the following procedure. First, a filter housing body having an inlet portion that forms an opening for inserting a filter to be removed is attached to the filter fixing frame or the outside of the filter fixing frame so that the inlet portion can accommodate the filter to be removed. Next, the filter to be removed is removed and collected in the filter housing. Next, after removing the inlet portion of the filter housing from the filter fixing frame or the outside of the filter fixing frame, the filter housing is replaced with a new filter.

  In this filter replacement method, the inlet portion of the filter storage body can be attached to the outside of the filter fixing frame or the filter fixing frame so that the filter to be removed can be stored using the storage body fixing means. It is possible to prevent dust and the like from being scattered when the filter is removed from the filter fixing frame during the filter replacement work of the air purification filter unit. This eliminates the possibility of filter replacement workers inhaling dust containing bacteria and harmful chemical substances, or scattering them into the air in the building, and improves the workability when removing the filter from the filter fixing frame. improves.

  The filter replacement method according to an eighth aspect of the present invention is the filter replacement method according to the seventh aspect of the present invention, wherein the filter housing further includes a suction part that forms an opening to which a suction device can be connected. The suction unit is provided with an exhaust filter. When removing the filter to be removed and collecting it in the filter housing, the air inside the filter housing is sucked from the suction portion.

  In this filter replacement method, dust and the like are scattered outside from the filter housing by reducing the atmospheric pressure inside the filter housing to be lower than the external pressure while preventing dust and the like from scattering from the inside of the filter housing through the suction part. Can be prevented.

As described above, according to the present invention, the following effects can be obtained.
In the first invention, the inlet portion of the filter storage body can be attached to the outside of the filter fixing frame or the filter fixing frame so that the filter to be removed can be stored using the storage body fixing means. It is possible to prevent dust and the like from being scattered when the filter is removed from the filter fixing frame during the filter replacement work of the air purification filter unit.

In the second invention, since the suction portion and the exhaust filter are provided in the filter housing body, the atmospheric pressure in the filter housing body is adjusted to the outside while preventing dust and the like from scattering from the filter housing body through the suction portion. It can be made lower than the atmospheric pressure to prevent dust and the like from scattering from the filter housing.
In the third aspect of the invention, since the spacer member is disposed in the vicinity of the exhaust filter, the filter is removed from the filter fixing frame while lowering the atmospheric pressure inside the filter housing with the suction device using the suction device. Even when working, it is possible to secure a space for storing the filter removed from the filter fixing frame in the filter storage body.

In the fourth aspect of the invention, the filter is removed from the filter fixing frame and inserted into the filter holding body through the operation section with the inlet portion of the filter holding body attached to the filter fixing frame or the outside of the filter fixing frame. Can be easily performed.
In the fifth invention, the filter is removed from the filter fixing frame by using the flexibility of the filter storage body with the inlet portion of the filter storage body attached to the filter fixing frame or the outside of the filter fixing frame. Work such as putting in can be easily performed.

In the sixth invention, by attaching the filter storage body to the outside of the filter fixing frame or the filter fixing frame using the storage body fixing means, the filter is removed from the filter fixing frame and is collected in the filter storage body. The operation of removing the filter from the filter fixing frame can be performed in a short time.
In the seventh invention, the inlet portion of the filter storage body can be attached to the outside of the filter fixing frame or the filter fixing frame so that the filter to be removed can be stored using the storage body fixing means. It is possible to prevent dust and the like from being scattered when the filter is removed from the filter fixing frame during the filter replacement work of the air purification filter unit.

  In the eighth invention, while preventing dust and the like from scattering from the filter housing through the suction portion, the air pressure in the filter housing is made lower than the external pressure, and dust and the like are scattered from the filter housing to the outside. Can be prevented.

Hereinafter, embodiments of a filter exchange device and a filter exchange method according to the present invention will be described based on the drawings.
[First Embodiment]
(1) Configuration of Air Purifying Filter Unit FIG. 1 is a cross-sectional view of a schematic structure of an air purifying filter unit 1 for exhaust that is embedded in a ceiling space as an example of an air purifying filter unit.

  The air cleaning filter unit 1 mainly includes a unit casing 2. The unit casing 2 is a box having an inlet opening 2a serving as an inlet for air exhausted from a room having an opening on the lower surface, and is embedded in the ceiling surface U via a fitting (not shown). An exhaust grille 3 is provided below the unit casing 2 so as to cover the inlet opening 2a from the indoor side. Further, the unit casing 2 has an outlet nozzle 2b serving as an air outlet in the unit casing 2 on a side surface, and in this embodiment, is flange-connected to an exhaust duct 62 to which an exhaust fan 61 is connected. Inside the unit casing 2, there is a filter 4 that captures dust in the air so that the internal space is divided into an upstream space S1 on the inlet opening 2a side and a downstream space S2 on the outlet nozzle 2b side. Is provided. Thus, the indoor air is sucked into the upstream space S1 of the unit casing 2 through the exhaust grille 3 and the inlet opening 2a by operating the exhaust fan 61, and after the dust and the like are removed by the filter 4, The air is exhausted to the outside through the side space S2, the outlet nozzle 2b, and the exhaust duct 62 (see the white arrow in FIG. 1).

  The filter 4 includes a filter medium 41 that captures dust and the like in the air, and a filter frame 42 that surrounds the periphery of the filter medium 41. The filter medium 41 is, for example, a substantially rectangular cloth body made of glass fiber, resin fiber, or the like whose cross section is bent into a pleat shape. The filter frame 42 is a substantially rectangular frame made of resin, metal, paper, nonwoven fabric, or the like that surrounds and supports the periphery of the filter medium 41, and both upstream and downstream ends of the filter medium 42 support the periphery of the filter medium 41. It extends toward the inner periphery so as to sandwich it. The filter 4 is detachably fixed to the unit casing 2. Specifically, a filter fixing frame 21 that fixes the peripheral edge of the filter frame 42 is provided on the inner surface of the unit casing 2. In this embodiment, the filter fixing frame 21 is disposed so as to be surrounded by the inner surface of the side surface of the unit casing 2. The filter fixing frame 21 extends inward from the inner surface of the side surface of the unit casing 2, and is a square ring that contacts the downstream surface of the filter 4 (specifically, the downstream end of the filter frame 42). Abutting portion 21a. The filter fixing frame 21 extends from the contact portion 21a toward the upstream side of the filter 4, and has a square annular fitting portion 21b into which the filter frame 42 can be fitted. Thereby, as shown in FIG. 2, the filter 4 is fitted into the filter fixing frame 21 and fixed from the upstream space S1 (see arrow A in FIG. 2). At this time, as shown in FIG. 2, the packing 22 is interposed between the downstream end of the filter frame 42 and the abutting portion 21 a of the filter fixing frame 21 as necessary, so that the filter frame 42. And the sealing property between the filter fixing frame 21 may be improved. Further, the downstream end of the filter frame 42 and the contact portion 21a of the filter fixing frame 21 may be fixed with screws or the like.

(2) Filter Replacement Device and Used Filter Replacement Operation Next, the filter replacement device 71 and the filter replacement method for the used filter 4 of the air purification filter unit 1 will be described.
First, the filter replacement device 71 will be described with reference to FIGS. 3, 4, and 5. Here, FIG. 3 is an enlarged view showing the vicinity of the filter 4 in FIG. 1, FIG. 4 is a view taken in the direction of arrow I in FIG. 3, and FIG. The filter replacement device 71 mainly includes a filter housing 91 and a housing fixing means 81. In this embodiment, the storage body fixing means 81 includes a fixed frame hook portion 81 a provided in the filter fixing frame 21 and a hook member that can be engaged with the fixed frame hook portion 81 a provided in the filter storage body 91. It comprises a stop hole 81b. In the present embodiment, four fixed frame hook portions 81a are provided so as to protrude outward from the vicinity of the corner portion of the square annular fitting portion 21b of the filter fixed frame 21. The hook locking hole 81b is formed in an inlet portion 91a that forms an opening into which the filter 4 to be removed is inserted. In the present embodiment, the same number of hook locking holes 81b as the fixed frame hook portions 81a (that is, four) are provided. In this embodiment, the filter housing 91 is a bag-like member, and is mainly connected to an inlet portion 91a that forms an opening for storing the used filter 4 and a suction device such as a suction fan or a vacuum cleaner. A suction portion 91b that can be used, a glove-shaped operation portion 91c that allows access to the used filter 4 in a state where the filter housing 91 is attached to the filter fixing frame 21, and a suction portion 91b. The exhaust filter 92, a tapered cylindrical spacer member 93 disposed in the vicinity of the exhaust filter 92, and a closing member 94 such as a string for closing the opening by binding the inlet portion 91a.

  Next, a method for replacing the used filter 4 will be described with reference to FIGS. 6, 7, and 8. Here, FIG. 6 is a view showing a state in which the filter housing 91 is attached to the filter fixing frame 21, and FIG. 7 is a view in which the filter 4 is removed from the filter fixing frame 21 and enters the filter housing 91. FIG. 8 is a view showing a state in which the filter housing 91 is detached from the filter fixing frame 21 and the opening of the inlet portion 91a is closed. The method for replacing the used filter 4 is performed according to the following procedure. First, the filter replacement operator removes the exhaust port grill 3 of the air cleaning filter unit 1. Next, the filter storage body 91 having an inlet portion 91a that forms an opening into which the used filter 4 is inserted is attached to the filter fixing frame 21 so that the inlet portion 91a can store the used filter 4. More specifically, it is fixed by hooking a hook locking hole 81b of the filter housing 91 to the fixed frame hook portion 81a of the filter fixing frame 21 (see FIG. 6). As a result, the inlet 91a of the filter housing 91 is disposed so as to surround the filter 4. At this time, as shown in FIG. 6, by closing the closing member 94 along the outer peripheral surface of the filter fixing frame 21, the gap between the inlet portion 91 a of the filter housing 91 and the filter fixing frame 21 is reduced. It is desirable to make it smaller. Next, as shown in FIG. 7, the filter replacement operator puts his hand in the operation portion 91 c, removes the used filter 4 from the filter fixing frame 21, puts it in the filter housing 91 and collects it ( (See arrow B in FIG. 7). At this time, the suction device 90 is connected to the suction portion 91b of the filter housing 91 to suck the air in the filter housing 91 to the outside (see the white arrow in FIG. 7), and the filter 4 is attached to the filter fixing frame 21. By performing the removal operation from the filter housing 91, the dust inside the filter housing 91 is prevented from scattering from the inside of the filter housing 91 through the suction part 91b, and the air pressure in the filter housing 91 is made lower than the external air pressure. It is desirable to prevent dust and the like from scattering from the inside. Further, by providing the spacer member 93 in the vicinity of the exhaust filter 92 as in the filter housing body 91 of the present embodiment, the air pressure in the filter housing body 91 is made lower than the external air pressure using the suction device 90. However, even when the filter 4 is removed from the filter fixing frame 21, the shape of the filter housing 91 can be defined to some extent, and the filter removed from the filter fixing frame 21 can be placed in the filter housing 91. Space to store can be secured. Moreover, since the space between the removed filter and the suction portion can be secured, scattering of dust and the like from the filter due to suction can be more effectively prevented. Next, as shown in FIG. 8, after removing the inlet portion 91 a of the filter housing 91 from the filter fixing frame 21, the inlet portion 91 a is closed by being tied with a closing member 94, and replaced with a new filter 4.

  Further, in the above, the storage body fixing means 81 includes a plurality of fixed frame hook portions 81a provided in the filter fixing frame 21 and a hook locking hole 81b provided in the filter storage body 91. Without being limited thereto, an adhesive tape, a magnet, or the like may be used. Further, the number of storage body fixing means 81 is not limited to the above. For example, a number of hook locking holes 81b may be provided in the filter storage body 91 so as to be compatible with various filter fixing frames 21. Further, since the filter housing 91 only needs to be fixed so that the inlet portion 91a can store the filter 4, the fixed frame hook portion 81a is placed outside the filter fixing frame 21 (for example, the inner surface of the unit casing 2). You may make it provide in.

In the above description, a string is used as the closing member 94. However, the present invention is not limited thereto, and rubber, tape, or the like may be used, or the inlet 91a itself may be formed of a stretchable material.
In the above description, the shape of the spacer member 93 is a tapered cylindrical shape. However, the shape of the spacer member 93 is not limited to this, and the spacer member 93 may have various shapes as long as it can secure a space for the filter 4 removed from the filter fixing frame 21. Is applicable. In addition, the spacer member 93 may be a folded structure or a partially weak structure, thereby reducing the packing state when the filter storage body 91 is carried into the field for filter replacement work, or the filter storage body 91. It is possible to reduce the packing state in a state where the filter is stored in the container.

In the above description, the operation portion 91c is provided with a glove-shaped portion in the filter housing 91. However, the present invention is not limited to this. For example, the filter housing 91 itself is made of a flexible material and used. It may be possible to access the already-filter 4.
Furthermore, in the above, a bag body is used as the filter housing body 91, but a box body having higher rigidity than the bag body may be used. However, in this case, it is necessary to close the opening by attaching a lid to the inlet.

In the above description, the exhaust air purification filter unit 1 embedded in the space behind the ceiling has been described as an example. However, the present invention is also applicable to an exhaust air purification filter unit embedded in the space behind the wall. . However, in this case, the surface of the filter faces the side instead of the vertical direction.
(3) Features The replacement method of the used filter 4 of the air purification filter unit 1 of the present embodiment and the filter replacement device 71 used therefor have the following features.

(A)
The filter replacement method of the present embodiment includes a filter 4 having a filter medium 41 that captures dust and the like in the air and a filter frame 42 that surrounds the periphery of the filter medium 41, and a filter fixing frame 21 that fixes the periphery of the filter frame 42. A filter housing 91 having an inlet portion 91a that forms an opening into which the filter 4 to be removed is placed, and the inlet portion 91a is a subject to be removed. The filter 4 is attached to the filter fixing frame 21 or the outside of the filter fixing frame 21 so that the filter 4 can be stored. Next, the filter 4 to be removed is removed and collected in the filter housing 91. Next, after removing the inlet 91 a of the filter housing 91 from the filter fixing frame 21 or the outside of the filter fixing frame 21, it is replaced with a new filter 4.

  In this filter replacement method, the filter fixing frame 21 or the inlet 91a of the filter storage body 91 can be stored using the storage body fixing means 81 constituting the filter replacement device 71 so that the filter 4 to be removed can be stored. Since it can be attached to the outside of the filter fixing frame 21, it is possible to prevent scattering of dust and the like when the filter 4 is removed from the filter fixing frame 21 during the filter replacement work of the air purification filter unit 1. As a result, there is no possibility that the filter replacement worker inhales dust containing bacteria or harmful chemical substances or scatters the dust in the air in the building, and work when removing the filter 4 from the filter fixing frame 21. Can be improved.

(B)
Further, the filter housing 91 constituting the filter replacement device 71 further includes a suction portion 91b that forms an opening to which the suction device 90 can be connected. The suction portion 91b includes an exhaust filter 92. Therefore, when removing the filter 4 to be removed and collecting it in the filter housing 91, the air inside the filter housing 91 is sucked from the suction portion 91b so that the filter is passed through the suction portion 91b. Preventing dust and the like from scattering from the inside of the filter housing 91 by preventing the dust and the like from scattering from the inside of the housing 91 and lowering the air pressure in the filter housing 91 to be lower than the external pressure. Can do.

(C)
Further, since the filter housing 91 constituting the filter exchange device 71 further includes a spacer member 93 in the vicinity of the exhaust filter 92, the air pressure in the filter housing 91 is changed to an external pressure using the suction device 90. Even when removing the filter 4 from the filter fixing frame 21 while lowering the height, the shape of the filter housing 91 can be defined to some extent, and the filter housing 91 is removed from the filter fixing frame 21. A space for storing the filter can be secured. Moreover, since the space between the removed filter and the suction portion can be secured, scattering of dust and the like from the filter due to suction can be more effectively prevented. Further, when the spacer member 93 is folded or partially weak in structure, the packing state when the filter housing 91 is carried into the field for filter replacement work can be reduced, or the filter housing 91 can be provided with a filter. The packing state in a state where the container is stored can be reduced.

(D)
Furthermore, the filter housing 91 constituting the filter exchange device 71 is an operation unit that enables access to the filter 4 to be removed while attached to the filter fixing frame 21 or the outside of the filter fixing frame 21. 91c is further provided, so that the filter 4 is removed from the filter fixing frame 21 via the operation portion 91c in a state where the inlet 91a of the filter housing 91 is attached to the filter fixing frame 21 or the outside of the filter fixing frame 21. Operations such as removal and insertion into the filter housing 91 can be easily performed. Here, as the operation part 91c, there exists a glove-shaped part etc. which a filter exchange operator can put in a hand. Further, instead of providing the operation unit 91c, the filter housing 91 itself may be made of a flexible material to allow access to the filter 4 to be removed.

(4) Modification In the filter replacement device 71 of the air purification filter unit 1 of the above embodiment, the filter fixing frame is used so that the filter 4 can store the inlet portion 91a of the filter storage body 91 using the storage body fixing means 81. 21 or the filter fixing frame 21 may be attached to the outside of the filter fixing frame 21, and the filter 4 may be removed from the filter fixing frame 21 to enter the filter housing 91.

  For example, the filter removing mechanism 85 shown in FIGS. 9 and 10 is formed in a space provided inside the fitting portion 21b of the filter fixing frame 21, and the wall portion on the filter 4 side of the fitting portion 21b. 23, a lock pin 85a that locks in a state where the filter 4 is in contact with the contact portion 21a of the filter fixing frame 21, and a magnetic body that is fixed to the end of the lock pin 85a in the space of the fitting portion 21b. A disk portion 85b, a spring 85c disposed between the disk portion 85b and the wall portion 24 of the fitting portion 21b on the unit casing 2 side, and urges the disk portion 85b toward the wall portion 23, and a filter storage body. 91 and a magnet 85d provided at the inlet portion 91a. And the entrance part 91a of the filter accommodating body 91 is attached to the filter fixing frame 21 by making the magnet 85d approach the disk part 85b from the wall part 24 side. That is, the magnet 85d and the disk portion 85b constitute the storage body fixing means 82. Moreover, because the disk portion 85b moves to the wall portion 24 side while compressing the spring 85c by the magnetic force of the magnet 85d (see arrow C in FIG. 10), the lock pin 85a also moves to the wall portion 24 side, 4 is unlocked, and the packing 22 provided at the contact portion 21a of the filter fixing frame 21 expands, and the filter 4 enters the filter housing 91 (see arrow D in FIG. 10). As described above, the filter removal mechanism 85 attaches the inlet 91a of the filter housing 91 to the filter fixing frame 21 or the outside of the filter fixing frame 21 so that the filter 4 can be stored. The filter housing 91 is removed.

  11 and 12 is formed in a space provided inside the fitting portion 21b of the filter fixing frame 21, and the wall portion on the filter 4 side of the fitting portion 21b. 23, a tapered section 86a having a triangular cross section that contacts the outer surface of the filter frame 42, a through hole 86b formed in the wall 24 on the unit casing 2 side of the fitting section 21b, and the filter housing 91 And an insertion pin 86c provided in the inlet portion 91a. Then, by inserting the insertion pin 86c into the through hole 86b, the inlet portion 91a of the filter housing 91 is attached to the filter fixing frame 21 (see arrow E in FIG. 11). That is, the insertion pin 86 c and the through hole 86 b constitute the housing body fixing means 83. Moreover, since the taper portion 86a is moved to the wall portion 23 side by the insertion pin 86c (see arrow E and FIG. 12 in FIG. 11), the filter frame 42 of the filter 4 is on the side opposite to the contact portion 21a of the filter fixing frame 21. The filter 4 enters the filter housing 91 (see arrow F in FIG. 12). In this way, the filter removal mechanism 86 attaches the inlet 91a of the filter housing 91 to the filter fixing frame 21 or the outside of the filter fixing frame 21 so that the filter 4 can be stored. The filter housing 91 is removed. When this filter removing mechanism 86 is employed, it is desirable to provide a tapered surface on the filter frame 42 of the filter 4 so as to correspond to the tip of the tapered portion 86a.

  By incorporating the filter removing mechanism 86 as described above into the filter exchange device 71, the filter housing 91 is attached to the filter fixing frame 21 or the outside of the filter fixing frame 21 using the housing fixing means 82, 83. Since 4 is removed from the filter fixing frame 21 and collected in the filter housing 91, the operation of removing the filter 4 from the filter fixing frame 21 can be performed in a short time.

[Second Embodiment]
(1) Configuration of Air Purifying Filter Unit FIG. 13 is a schematic structure of an air purifying filter unit 101 for exhaust installed as an example of an air purifying filter unit so as to be inserted in the middle of the exhaust duct 162 in the space behind the ceiling. FIG.

  The air purification filter unit 101 mainly includes a unit casing 102. The unit casing 102 is a box having a substantially rectangular cross section with a larger flow path cross section than the exhaust duct 162. In the present embodiment, the unit casing 102 includes an inlet nozzle 102a and an outlet nozzle 102b that are flange-connected to the exhaust duct 162. ing. The exhaust duct 162 is connected to an exhaust fan 161 connected so as to suck and discharge air flowing out from the outlet nozzle 102b. In the unit casing 102, a filter that captures dust and the like in the air so as to divide the internal space into an upstream space S1 on the inlet nozzle 102a side and a downstream space S2 on the outlet nozzle 102b side. 104 is provided. Thus, the indoor air is sucked into the upstream space S1 of the unit casing 102 through the exhaust duct 162 and the inlet nozzle 102a by operating the exhaust fan 161, and after the dust and the like are removed by the filter 104, the downstream side The air is exhausted outside through the space S2, the outlet nozzle 102b and the exhaust duct 162 (see the white arrow in FIG. 13).

The filter 104 includes a filter medium 141 that captures dust and the like in the air, and a filter frame 142 that surrounds the periphery of the filter medium 141. The filter medium 141 is, for example, a substantially rectangular cloth body made of glass fiber, resin fiber, or the like whose cross section is bent into a pleat shape. The filter frame 142 is a substantially quadrangular frame made of resin, metal, paper, nonwoven fabric, or the like that surrounds and supports the periphery of the filter medium 141, and both upstream and downstream ends of the filter medium 142 support the periphery of the filter medium 141. It extends toward the inner periphery so as to sandwich it. The filter 104 is detachably fixed to the unit casing 102. Specifically, a filter fixing frame 121 that fixes the peripheral edge of the filter frame 142 is provided on the inner surface of the unit casing 2. In the present embodiment, the filter fixing frame 121 is an upper side that supports the upper peripheral edge and the lower peripheral edge of the filter frame 142 in the filter frame 142 so as to be slidable in the lateral direction and immovably upstream and downstream. It has a support part 122 and a lower support part 123. The upper support portion 122 includes an upstream contact portion 122a that contacts an upstream surface of the filter 104 (specifically, an upstream upper end portion of the filter frame 142), and the upstream contact portion 122a to the filter 104. The filter frame 142 extending toward the downstream side of the filter frame 142 comes into contact with the fitting portion 122b to which the filter frame 142 can be fitted, and the downstream surface of the filter 104 (specifically, the upper end portion on the downstream side of the filter frame 142). And a downstream contact portion 122c. Further, the lower support portion 123 includes an upstream contact portion 123a that contacts an upstream surface of the filter 104 (specifically, an upstream lower end portion of the filter frame 142), and an upstream contact portion 123a. A fitting portion 123b that can fit a lower end portion of the filter frame 142 extending toward the downstream side of the filter 104, and a downstream surface of the filter 104 (specifically, a lower end portion on the downstream side of the filter frame 142). And a downstream abutting portion 123c that abuts. Further, as shown in FIG. 16, a part of the side surface of the unit casing 102 serves as a filter drawer lid 102 c that can be opened when the filter 104 is pulled out from the unit casing 102.
Accordingly, as shown in FIG. 17, the filter 104 opens the filter pull-out lid portion 102c, and laterally moves on the upper support portion 122 and the lower support portion 123 of the filter fixing frame 121 from the side surface of the unit casing 102. Is fixed to the filter fixing frame 121 (see arrow G in FIG. 15).

(2) Filter Replacement Operation Next, a method for replacing the used filter 104 of the air cleaning filter unit 101 will be described.
First, the filter replacement device 171 will be described with reference to FIGS. 16, 17, and 5. 16 is a sectional view taken along the line II-II in FIG. 13, FIG. 17 is a sectional view taken along the arrow III in FIG. 16, and FIG. 5 is a sectional view of the filter housing 191. The filter replacement device 171 mainly includes a filter storage body 191 and storage body fixing means 181. In the present embodiment, the storage body fixing means 181 includes a fixed frame hook portion 181 a provided in the filter fixing frame 121 and a hook member that can be engaged with the fixed frame hook portion 181 a provided in the filter storage body 191. It comprises a stop hole 181b. In the present embodiment, four fixed frame hook portions 181a are provided so as to protrude outward from the upstream contact portions 122a and 123a and the downstream contact portions 122c and 123c. The hook locking hole 181b is formed in the inlet portion 191a that forms an opening into which the filter 104 to be removed is inserted. In the present embodiment, the same number of hook locking holes 181b as the fixed frame hook portions 181a (that is, four) are provided. Since the filter storage body 191 has the same structure as the filter storage body 91 of the first embodiment, description thereof will be omitted by setting the reference numerals to the 100s.

  Next, a method for replacing the used filter 104 will be described with reference to FIG. Here, FIG. 18 is a diagram illustrating a state in which the filter housing body 191 is attached to the filter fixing frame 121 and the filter 104 is removed from the filter fixing frame 121. The method for replacing the used filter 104 is performed according to the following procedure. First, the filter replacement operator removes the filter pull-out lid portion 102c of the air cleaning filter unit 101. Next, the filter storage body 191 having an inlet portion 191a that forms an opening into which the used filter 104 is inserted is attached to the filter fixing frame 121 so that the inlet portion 191a can store the used filter 104. More specifically, the filter fixing frame 121 is fixed by hooking the hook locking hole 181b of the filter housing 191 to the fixing frame hook portion 181a of the filter fixing frame 121 (see FIG. 18). As a result, the inlet 191 a of the filter housing 191 is disposed so as to surround the filter 104. At this time, as shown in FIG. 18, the gap between the inlet portion 191 a of the filter housing 191 and the filter fixing frame 121 is reduced by causing the closing member 194 to follow the outer peripheral surface of the filter fixing frame 121. It is desirable to make it smaller. Next, the used filter 104 is removed by sliding on the filter fixing frame 121, and is put into the filter housing 191 to be collected (see arrow H in FIG. 18). At this time, as in the first embodiment, a suction device is connected to the suction portion 191b of the filter housing 191 to remove the filter 104 from the filter fixing frame 121 while sucking the air in the filter housing 191 to the outside. Since it is the same as that of 1st Embodiment about performing etc., description is abbreviate | omitted.

Similarly to the modification of the first embodiment, a filter removing mechanism that removes the filter 104 when the filter housing 191 is attached may be employed.
[Third Embodiment]
In the air purification filter units 1 and 101 of the first and second embodiments, one filter 4 and 104 is fixed to the filter fixing frames 21 and 121. However, the air purification filter unit 201 shown in FIGS. As described above, the present invention may be applied to a large air purification filter unit in which a plurality of filters 204 are fixed to one filter fixing frame 221.

  The filter fixing frame 221 of the present embodiment can fix four filters 204 having a filter medium 241 that captures dust and the like in the air and a filter frame 242 that surrounds the periphery of the filter medium 241. The filter frame 242 has a contact portion 221a with which the filter frame 242 contacts, and a square annular fitting portion 221b into which the filter frame 242 can be fitted. And the fixed frame hook part 281a is provided in the position corresponding to the corner | angular part of each filter 204 of the fitting part 221b. In addition, as shown in FIG. 5, the filter housing 291 is provided with a hook locking hole 281b, and constitutes the housing fixing means 281 together with the fixed frame hook portion 281a.

  Thus, as shown in FIG. 21, the filter housing body 291 b is hooked on the fixed frame hook portion 281 a corresponding to the filter to be removed from among the plurality of filters 204, thereby The inlet portion 291a of 291 is fixed to the filter fixing frame 221 so that the filter 204 can be stored, and the filter 204 to be removed can be removed and placed in the filter storage body 291 as in the first embodiment (see FIG. 21 (see arrow J). When there are a plurality of filters 204 to be removed, the position of the fixed frame hook portion 281a that hooks the hook locking hole 281b of the filter housing 291 is changed, and the removal work of the filter 204 can be sequentially performed. Is possible.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.
For example, in the above-described embodiment, the present invention has been described using an example in which the present invention is applied to an exhaust air cleaning filter unit. However, the present invention is not limited to this, and is installed in a floor-type air cleaner or suction port. The present invention can also be applied to a filter unit provided at the inlet or outlet of a duct type air conditioner or a total heat exchanger.

  By using the present invention, in the air cleaning filter unit, it is possible to prevent trapped dust and the like from scattering from the used filter when the used filter is removed during filter replacement work.

It is sectional drawing which shows schematic structure of the air purifying filter unit for exhaust_gas | exhaustion installed by embedding in the ceiling back space concerning 1st Embodiment. It is a figure which shows the state which is going to attach a filter to a filter fixed frame. It is a figure which expands and shows the filter vicinity of FIG. FIG. 4 is a view as viewed from an arrow I in FIG. It is sectional drawing of a filter storage body. It is a figure which shows the state by which the filter storage body was attached to the filter fixed frame. It is a figure which shows the state from which the filter was removed from the filter fixing frame and entered the filter housing (the suction device is also shown). It is a figure which shows the state which removed the filter storage body from the filter fixing frame, and closed the opening of the inlet_port | entrance part. It is a figure which shows the state by which the filter was locked to the filter fixed frame in the filter exchange apparatus which has a filter removal mechanism. It is a figure which shows the state from which the filter was removed from the filter fixed frame in the filter exchange apparatus which has a filter removal mechanism. It is a figure which shows the state by which the filter was locked to the filter fixed frame in the filter exchange apparatus which has a filter removal mechanism. It is a figure which shows the state from which the filter was removed from the filter fixed frame in the filter exchange apparatus which has a filter removal mechanism. It is sectional drawing of schematic structure of the air purifying filter unit for exhaust_gas | exhaustion installed so that it might be inserted in the middle of an exhaust duct in the ceiling back space concerning 2nd Embodiment. It is II-II sectional drawing of FIG. It is a figure which shows the state which is going to attach a filter to a filter fixed frame. It is II-II sectional drawing of FIG. It is the III arrow directional view of FIG. It is a figure which shows a mode that a filter storage body is attached to a filter fixing frame, and a filter is removed from a filter fixing frame. It is a top view which shows schematic structure of the air purifying filter unit concerning 3rd Embodiment. It is sectional drawing which shows schematic structure of the air purifying filter unit concerning 3rd Embodiment. It is a figure which shows the state from which the filter was removed from the filter fixing frame and entered the filter housing (the suction device is also shown).

Explanation of symbols

1, 101, 201 Air purifying filter unit 4, 104, 204 Filter 21, 121, 221 Filter fixing frame 41, 141, 241 Filter medium 42, 142, 242 Filter frame 71, 171, 271 Filter changing device 81, 82, 83, 181, 281 Storage body fixing means 85, 86 Filter removal mechanism 91, 191, 291 Filter storage body 91 a, 191 a, 291 a Inlet part 91 b, 191 b, 291 b Suction part 91 c, 191 c, 291 c Operation part 92, 192, 292 Exhaust filter 93, 193, 293 Spacer member

Claims (8)

A filter (4, 104, 204) having a filter medium (41, 141, 241) for capturing dust in the air and a filter frame (42, 142, 242) surrounding a peripheral portion of the filter medium, and a peripheral edge of the filter frame A filter replacement device for an air purifying filter unit (1, 101, 201) provided with a filter fixing frame (21, 121, 221) for fixing a portion;
A filter housing (91, 191, 291) having an inlet (91a, 191a, 291a) that forms an opening into which a filter to be removed is placed;
A storage body fixing means (81, 82, 83, 181, 281) for attaching the inlet portion to the outside of the filter fixing frame or the filter fixing frame so that a filter to be removed can be stored;
The filter changer (71, 171, 271) provided with. The filter housing (91, 191, 291) further includes a suction part (91b, 191b, 291b) that forms an opening to which a suction device can be connected,
The suction part is provided with exhaust filters (92, 192, 292),
The filter changer (71, 171, 271) according to claim 1. The filter housing (91, 191, 291) further includes a spacer member (93, 193, 293) disposed in the vicinity of the exhaust filter (92, 192, 292).
The filter changer (71, 171, 271) according to claim 2.   The filter storage body (91, 191, 291) is attached to the filter fixing frame (21, 121, 221) or the outside of the filter fixing frame, and the filter (4, 104, 204) to be removed. The filter exchange device (71, 171, 271) according to any one of claims 1 to 3, further comprising an operation unit (91c, 191c, 291c) that makes it possible to access the device.   The filter changer (71, 171, 271) according to any one of claims 1 to 3, wherein the filter housing (91, 191, 291) is made of a flexible material.   The filter (4) is attached to the filter fixing frame by attaching the filter storage body (91) to the filter fixing frame (21) or the outside of the filter fixing frame using the storage body fixing means (82, 83). The filter changer (71) according to any one of claims 1 to 5, further comprising a filter removal mechanism (85, 86) to be removed from the filter. A filter (4, 104, 204) having a filter medium (41, 141, 241) for capturing dust in the air and a filter frame (42, 142, 242) surrounding a peripheral portion of the filter medium, and a peripheral edge of the filter frame A filter replacement method for an air purification filter unit (1, 101, 201) provided with a filter fixing frame (21, 121, 221) for fixing a portion,
A filter housing body (91, 191, 291) having an inlet portion (91a, 191a, 291a) that forms an opening for inserting a filter to be removed so that the inlet portion can accommodate a filter to be removed. , Attached to the outside of the filter fixing frame or the filter fixing frame,
Remove the filter to be removed, collect it in the filter housing,
After removing the inlet part of the filter housing from the outside of the filter fixing frame or the filter fixing frame, replace with a new filter.
Filter replacement method. The filter housing (91, 191, 291) further includes a suction part (91b, 191b, 291b) that forms an opening to which a suction device can be connected,
The suction part is provided with exhaust filters (92, 192, 292),
When removing the filter (4, 104, 204) to be removed and collecting it in the filter housing (91, 191, 291), the air inside the filter housing is sucked from the suction part.
The filter replacement method according to claim 7.

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