JPH11114445A - Roll filter cassette and air cleaning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical and handy roll filter cassette and an air cleaning apparatus comprising the roll filter cassette. SOLUTION: In a roll filter cassette C of this air cleaning apparatus, a cassette part 31a of a casing 31 is formed as a casing and then four corners of a roll filter part 23d in a utilization region are pierced with piercing claws 31s and guiding pieces 31t to engage and support a roll filter without being loosened in the rear side face of a casing 31. Almost all of the surface of the rear side of the roll filter 23 is kept exposed to make it easy to confirm the mounting state. The casing 31 is held in a storing recessed part of a rear case and a projected part is brought into contact with the roll filter 23 to prevent the roll filter from being loosened. Consequently, dust collecting efficiency deterioration of the filter due to the loosening can be prevented and as a result, the structure is simplified and the cost is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaning device. In particular, it relates to a device including a roll filter cassette for supporting a roll filter.

[0002]

2. Description of the Related Art Conventionally, an electrostatic precipitating type air cleaning apparatus has an ionizing section including an ionizing line to which a high voltage for charging dust particles is applied, and an ionizing section for capturing the charged dust particles. Some include an electrostatic filter as a dust collecting unit. The electrostatic filter is a cloth member, for example,
The part to be used is pulled out from the wound roll and used. Further, the electrostatic filter is housed in a casing, and is entirely configured as a cassette. The cassette can be attached to and detached from the apparatus main body to perform maintenance of the electrostatic filter. The casing of the above-described cassette includes, for example, a pair of lattice-shaped casings formed of a resin material such as plastic, and these casings are connected to each other so as to be openable and closable, and are supported with an electrostatic filter sandwiched therebetween. I am trying to do it.

[0003]

However, when the electrostatic filter is sandwiched between a pair of grid-like casings, the pair of grid-like casings must be opened and closed during maintenance, which is troublesome. In addition, it is difficult for an unfamiliar person to understand how to draw out the electrostatic filter. For this reason, convenience may not be good.

Further, a cassette in which a pair of lattice-shaped casings are connected has a large number of parts, a complicated structure for connection, and is expensive due to the cost of parts and assembly. Therefore, an object of the present invention is to solve the above-mentioned technical problems, and to provide a convenient and inexpensive roll filter cassette and an air cleaning device including the same.

[0005]

According to a first aspect of the present invention, there is provided a roll filter cassette having first and second surfaces located on the front and back, and a ventilation flow passing through both surfaces. A casing for flowing, a roll storage section formed at the end of the second surface of the casing, and having a semicircular cross section for storing a roll on which a roll filter is wound, and a roll winding section formed on the roll storage section. A core holding portion for detachably holding a core, and a use region holding portion for supporting a roll filter of a use region drawn out from the roll along the second surface so that substantially the entire ventilation surface is exposed. It is characterized by having.

According to this configuration, the following operation is achieved.
That is, in this roll filter cassette, the core is inserted into the core holding portion, and the roll is accommodated in the roll accommodating portion. By pulling out a portion to be a use area from this roll, along the second surface, and supporting it by a use area holding portion,
Installation can be completed. Since the entire surface of the roll filter in a state where the mounting is completed is exposed, it is easy to understand the mounting state of the roll filter. As a result, even if a person is unfamiliar, it is difficult to pull out the roll filter during maintenance. It is easy to understand and can be easily maintained.

Further, since the casing only needs to be provided on one side of the roll filter, the number of parts can be reduced as compared with the case where the casing is arranged on both sides of the roll filter, so that the cost can be reduced. A roll filter cassette according to a second aspect of the present invention is the roll filter cassette according to the first aspect, wherein the core holding portion is formed in an inner deep portion of a groove that opens forward of the second surface to form the core. It is characterized by comprising a storage section for storing.

According to this configuration, in addition to the operation of the first aspect of the present invention, the roll holding state can be easily recognized, so that the roll can be easily replaced. A roll filter cassette according to a third aspect of the present invention is the roll filter cassette according to the first or second aspect, wherein the use region holding portion includes a support claw that supports at least four corners of the roll filter in the use region. I do.

According to this configuration, in addition to the function of the first or second aspect of the invention, the following function is provided. That is, since the four corners of the roll filter in the use area can be supported, slack can be prevented. Moreover, since the structure for supporting is simple, it is easy to understand how to attach and detach.
Easy maintenance. According to a fourth aspect of the present invention, there is provided the roll filter cassette according to the third aspect, wherein the support claws hold both side portions of the portion drawn to the use area of the roll filter on the side closer to the core. In addition, a pair of guide claws having an L-shaped cross section for guiding the roll filter from the roll, and a pair of stab claws that hold through the both edges of the leading end of the portion pulled out to the use area of the roll filter. It is characterized by including.

According to this configuration, in addition to the function of the third aspect of the invention, the following function is achieved. That is, after the roll filter is pulled out from the roll while being guided by the guide claws, the end of the roll filter on the drawing side is pierced with the piercing claws, whereby the roll filter in the use area can be securely and easily mounted. In addition, by holding the roll filter portion of the use area near the winding core with the guide claws, the roll filter can be easily mounted without loosening.

[0011] The air purifying apparatus of the invention according to claim 5 is as follows.
A first portion comprising the roll filter cassette according to any one of claims 1 to 4, and a housing recess for housing the roll filter cassette, wherein the housing recess covers a portion along the exposed half surface of the roll, A second portion facing the roll filter in the use area along the second surface of the casing of the roll filter cassette, wherein the second portion is in contact with a part of the roll filter in the use area. It is characterized by having.

According to this configuration, in addition to the function of the invention according to any one of claims 1 to 4, the following function is provided.
That is, in a state where the roll filter cassette is housed in the housing recess, the roll is covered with the first portion of the housing recess, and the roll filter in the use area comes into contact with the protrusion, so that the roll filter can be held without slack. . As a result, problems such as pressure loss and reduced dust collection efficiency due to loosening can be prevented.

Further, in the roll filter cassette alone,
The structure for holding the roll filter can be simplified. Further, when the roll filter cassette has a grounding member for grounding the roll filter, the roll filter can be pressed against the grounding member by the projection, and the roll filter can be reliably grounded.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the accompanying drawings. Hereinafter, an air cleaning device 1 having a function of purifying contaminants by a photocatalyst and a function of removing dust by ionization will be described as an example. FIG. 1 is an exploded perspective view of an air cleaning device according to an embodiment of the present invention.

The air purifying apparatus 1 includes a box-shaped housing 10 for defining an air passage therein. Housing 1
Within 0, the following components are arranged in order from the front along the air flow path. That is, the pre-filter 21 for removing relatively large dust and dust, and the dust particles in the flow (ventilation flow) along the air passage are ionized by the ionization unit 22 and adsorbed by the roll filter 23 as a dust collection unit. A dust collection element 24, a photocatalyst element 25 for holding the photocatalyst, a light source 26 for purifying contaminants by irradiating the photocatalyst element 25 with ultraviolet light to excite the photocatalyst, and a ventilation flow in a predetermined direction. And a blower fan 27 such as a sirocco fan for generating air.

The housing 10 has a front case 11 having a suction port 11a on the front surface and defining an upstream portion of an air passage,
And a rear case 12 provided behind the front case 11. The rear case 12 defines a downstream portion of the air passage. An accommodation recess 12 a is formed on the front surface of the rear case 12. In the accommodation recess 12a, in order from the front,
Dust collection element 24, photocatalytic element 25, light source 26
Is attached detachably, a blower fan 27 is attached to the inner deep portion of the accommodation recess 12a, and an air outlet (not shown) is provided behind the blower fan 27.

The air passage is an air passage that flows from the suction port 11a into the front case 11 and the rear case 12 from the front to the rear and reaches the outlet. FIG. 2 is a cross-sectional plan view of a schematic configuration of a dust collecting element, a photocatalytic element, and a light source of the air cleaning device of FIG. FIG. 3 is a partial right side sectional view of the air cleaning device of FIG.

The dust-collecting element 24 has a plurality of ionizing lines 33 as a plurality of discharge lines extending in a direction perpendicular to the direction of the air flow and being parallel to each other constituting the ionizing section 22, and sandwiching these ionizing lines 33. And a counter electrode portion 32 including a pair of counter electrode plates 32a disposed opposite to each other. The ionization unit 22 charges the dust particles in the ventilation flow by an ion shower generated by corona discharge. In addition, the opposite electrode plate part 32 is grounded. Further, the roll filter 23 of the dust collecting element 24 includes an electrostatic filter 23a, and the electrostatic filter 23a can electrically adsorb the dust particles charged by the ionization unit 22.

The roll filter 23 includes a deodorizing filter 23b, on which a photocatalyst described later is carried. The photocatalyst element 25 is provided with a photocatalyst that decomposes odor components and the like when irradiated with ultraviolet rays, and is provided with a plurality of ventilation holes 5.
It is carried on the surface or inside of a photocatalyst carrier 51 composed of a honeycomb structure or the like having 1a. The photocatalyst means a substance that absorbs light and gives the energy to a reactant to cause a chemical reaction, and specifically, titanium oxide (TiO ₂ ) and zinc oxide (ZnO) having an anatase type crystal structure And tungsten oxide (WO ₃ ).

The light source 26 is, for example, a straight tube type cold cathode fluorescent lamp, and a plurality of light sources 26 are provided. This light source 26
Can emit light having a wavelength of 320 to 420 nm,
There is no adverse effect on the human body, and the photocatalyst such as TiO ₂ or ZnO can be activated to efficiently purify pollutants. According to the air purifying device 1, the blowing fan 2
When the air conditioner 7 is operated, air is sucked in from the air inlet 11a, and while flowing through the above-described air passage, relatively large dust is captured by the pre-filter 21 and fine dust is charged by the ionization unit 22 to be electrostatically charged. Contaminants such as odor components are captured by the filter 23a and purified by the photocatalytic element 25 and the deodorizing filter 23b. The air thus purified is blown out from the outlet.

The details will be described below. Dust collection element 2
In 4, an ionization unit 22, a roll filter 23 and a roll filter cassette C including a casing that supports the roll filter 23 are integrally unitized. As shown in FIG. 1, the dust collecting element 24 includes a casing 31 that defines an outer shape of the dust collecting element 24. An ionization section 22 is provided on a front side portion of the casing 31, and a handle 31 b for attachment and detachment is formed on a side surface portion. The rear side portion of the casing 31 has a cassette portion 31a functioning as a casing of the roll filter cassette C, and the roll filter 23 is attached to the cassette portion 31a.

FIG. 4 is a perspective view of the dust collecting element of the air purifying apparatus of FIG. 1, as viewed from the rear with the roll filter removed. Please refer to FIG. 4 and FIG. The roll filter 23 includes the above-described electrostatic filter 23a and the above-described deodorizing filter 23b, and is configured by overlapping both sheet-shaped filters and bonding them by heat fusion with heat fusion powder or needle punching. . As the electrostatic filter 23a, for example, a polyolefin-based chargeable nonwoven fabric having a basis weight of 50 g / m ² can be used. The deodorizing filter 23b is, for example, a polyester nonwoven fabric having a basis weight of 70 g / m ² coated with the above-described photocatalyst.

When the roll filter 23 is mounted on the cassette portion 31a, the roll filter 23 is a roll formed by winding a sheet-like material around a tubular core 23e.
c and a roll filter portion 23d of a use area that is unreeled from the roll 23c. Roll 23c
Is accommodated in the roll accommodating portion 31c of the cassette portion 31a, and the roll filter portion 23d of the use area fed out from the roll 23c is disposed so as to be orthogonal to the ventilation flow. Further, in the roll filter portion 23d in this use area, the electrostatic filter 23a is
2 are arranged.

The roll filter portion 23 in the use area
d has a slit 23f through which a stab claw 31s described later passes. The casing 31 is rectangular in a front view in a state of being housed in the housing recess 12a, and is formed in a substantially box shape having a small thickness in the front-rear direction. The casing 31 includes an upper edge portion 31f, a pair of side edge portions 31g hanging down from both left and right ends of the upper edge portion 31f, a lower plate portion 31h connecting lower portions of both side edge portions 31g, a lower plate portion 31h and an upper portion. It has a plurality of lattice portions 31i having a substantially T-shaped cross section that connect the edge portions 31f to each other. These parts are integrally formed of a resin material.

The ionizing wire 33 and the opposing electrode plate 32 are positioned and attached to the front side of the casing 31 to form the ionizing part 22. That is, the opposing electrode plate portion 32 is formed of a conductive plate formed in a substantially corrugated shape having a rectangular wave cross section. The opposite electrode plate portion 32 includes a plurality of recesses 32b including a pair of opposite electrode plates 32a extending along the direction of the airflow, and a bottom portion (located on the right side in FIG. 2) of the recess 32b. And a grid-like portion 32d that connects the downstream edges of a pair of opposing electrode plates 32a facing each other in the airflow direction, and a large number of through holes 32c defined in the grid-like portion 32d. I have. The concave stripes 32b are arranged between the adjacent lattice portions 31i and extend in the up-down direction.
In addition, an ionization wire 33 is extended in the vertical direction in the concave streak 32b. The through-hole 32c becomes a part of the above-mentioned air passage, and the ventilation flow can pass around the ionization line 33.

As shown in FIGS. 3 and 4, the cassette portion 31a has a first surface 31x and a second surface 3x located on the front and back sides.
1y, and is configured such that a ventilation flow flows through both surfaces thereof. The roll filter portion 23d in the use area is arranged along the second surface 31y. Specifically, the first surface 31x is a virtual surface at the boundary between the cassette unit 31a and the ionization unit 22 and faces the ionization unit 22 along the rear surface of the opposing electrode plate unit 32. The second surface 31y is a rear surface of the casing 31.

The cassette section 31a accommodates the use area holding section 31d which supports the roll filter portion 23d of the use area along the second face 31y, and the roll 23c formed at the end of the second face 31y. A roll accommodating portion 31c. In the roll accommodating portion 31c, the lower plate portion 31h of the casing 31 is formed in a semicircular cross section,
c to define a recess for accommodating c. This recess is open rearward, and the roll 23c can be mounted in the recess from the rear.

The roll accommodating portion 31c has a plurality of guide ribs 31j for guiding a portion of the roll filter 23 near the roll 23c. The roll accommodating portion 31c has a core holding portion 31m that detachably holds the core 23e of the roll 23c. Core holding part 3
1m is a groove 31n formed on both side edges 31g and opened rearward, and a core 2
3e for accommodating 3e.

The inlet of the groove 31n is formed wider than the inside, so that the core 23e can be easily inserted into the inside. The accommodation portion 31p is formed in a size corresponding to the diameter of the core 23e. The connection between the housing 31p and the groove 31n, that is, the entrance of the housing 31p is
e is smaller than the diameter of e by a predetermined amount.
Since the core 23e can be locked, it is possible to prevent the core 23e from being accidentally dropped from the housing portion 31p. Accordingly, the roll filter 23 can be prevented from being inadvertently dropped from the roll filter cassette C, so that the roll filter cassette C can be easily handled during maintenance. The winding core 23e
To put it in 1p, the side edge 31g is elastically deformed,
It can be inserted while pushing the entrance of the storage portion 31p. When the core 23e is inserted into the groove 31n from the rear entrance, it can be guided by the groove 31n, and the core 23e
It can be placed and held at 1p. In addition, when the dust collecting element 24 is mounted in the housing concave portion 12a, the entrance of the groove 31n is closed by the first portion 12b of the concave portion 12a, so that the core 23e in the core holding portion 31m is separated to the outside. That is prevented.

The guide rib 31j is formed on the rear surface of the lower plate portion 31h, and is used when the roll filter 23 is fed out from the roll 23c.
The guide can be smoothly guided to the use area holding portion 31d that supports the 3d. The use area holding portion 31d is set at a portion of the rear surface of the casing 31 that is the second surface 31y and through which a ventilation flow passes. The use area holding portion 31d supports the roll filter section 23d of the use area that is pulled out from the roll 23c along the second surface 31y so that substantially the entire ventilation surface of the roll filter portion 23d is exposed. In the use area holding portion 31d, the rear surface of the upper edge portion 31f of the casing 31 and the lower plate portion 31
h, the rear surface of the lattice portion 31i, and the opposing electrode plate portion 3
The front surface of the roll filter portion 23d in the use area can be arranged along each of the rear surfaces including the rear surface 2. A plurality of support claws are provided on the rear surface of the casing 31 to lock the four corners of the roll filter portion 23d in the use area.

The support claws include a stab claw 31s for locking two upper portions of the roll filter portion 23d in the use area and a guide claw 31t for locking two lower portions of the roll filter portion 23d in the use region. In. Here, the support claws
More portions of the roll filter 23 may be locked, and it is sufficient that at least four corners can be locked. Guide claw 31t
Is in the vicinity of the core holding portion 31m, and is formed integrally with the rear end of the side edge 31g of the casing 31 in an L-shaped cross section. The guide claw 31t has a portion along the edge of the roll filter portion 23d in the use area, and a portion extending from the rear end along the roll filter 23 to the inside of the roll filter 23. The guide claws 31t are provided such that a pair thereof opposes each other. The pair of guide claws 31t hold both sides of the roll filter portion 23d in the use area on the side closer to the core 23e, and
The pulling out of the roll filter 23 from the roll 23c can be guided.

The stab claws 31s are formed as a pair integrally with the upper edge 31f of the casing 31 in a hook shape bent upward. The pair of piercing claws 31 s penetrate both edges of the front end of the roll filter portion 23 d in the use area, and can be locked and held by the slit 23 f. As shown in FIGS. 1 and 2, the roll filter cassette C is detachably mounted as a dust collecting element 24 in a housing recess 12 a of a rear case 12 as an air cleaning device main body.

The receiving recess 12a has a first portion 12b formed at a lower portion thereof and having a semicircular cross section, and a first portion 12b.
And a second portion 12c above which is mounted the photocatalytic element 25. First part 12b
The lower part of the dust collecting element 24 is
c, so as to cover the exposed half surface. Second part 1
2c faces the roll filter portion 23d in the use area with the photocatalytic element 25 interposed therebetween. The second portion 12c is provided with a reinforcing member 52 of the photocatalytic element 25, and is configured to abut a part of the roll filter portion 23d in the use area.

The reinforcing member 52 is a member for connecting a plurality of honeycomb structures to constitute the photocatalyst carrier 51 and for preventing bending of the photocatalyst carrier 51 in a direction perpendicular to the ventilation surface 51c. . The reinforcing member 52 is a rod-shaped member having an I-shaped cross section, and the ventilation surface 51 c of the photocatalyst carrier 51.
Are arranged so as to extend in the vertical direction across the. In addition, a plurality of reinforcing members 52 are provided, for example, so as to be able to abut on the center in the left-right direction of the roll filter portion 23d in the use area.
It is provided in three places.

The reinforcing member 52 has a projection 52a which protrudes from the ventilation surface 51c of the photocatalyst carrier 51 on the dust collecting element 24 side and regulates the interval between the ventilation surface 51c and the roll filter 23. . This projection 52a
Extends in the up-down direction and continuously contacts the portion from the vicinity of the upper end edge of the roll filter portion 23d in the use area to the vicinity of the core 23e.

As shown in FIGS. 2 and 3, the reinforcing member 52 comes into contact with the roll filter portion 23d in the use area, so that the roll filter 23 can be prevented from being loosened. In particular, since the reinforcing member 52 continuously abuts in the up-down direction, it is possible to reliably prevent loosening, and it is more preferable because the reinforcing member 52 abuts on the entire length of the roll filter portion 23d in the use area in the up-down direction. Also, the lattice part 31i
Since the grid-like portion 32d of the opposing electrode plate portion 32 extends in the up-down direction and sandwiches the roll filter 23 between the reinforcing member 52, the loosening of the roll filter 23 can be more reliably prevented.

In the air cleaning device 1, the roll filter 23 can be maintained as follows. That is, as shown in FIG. 1, when the front case 11 is removed, the housing recess 12a is opened forward. In this state, the roll filter cassette C can be removed by pulling the casing 31 upward and forward. Also, it can be mounted by the reverse operation.

From the rear side of the removed roll filter cassette C, the roll filter 23 can be cleaned. That is, in the roll filter cassette C, as shown in FIG. 4, the core is inserted into the core holding portion 31m, and the roll 23c is accommodated in the roll accommodating portion 31c. By pulling out a portion to be a use area from the roll 23c, along the second surface 31y, and supporting it with the use area holding portion 31d, the mounting can be completed.

At this time, after the roll filter 23 is pulled out from the roll 23c while being guided by the guide claws 31t, the slit 23f at the end of the roll filter 23 on the pull-out side is pierced with the piercing claws 31s, so that the filter is reliably and easily inserted. The roll filter portion 23d in the use area can be mounted. Further, by holding the portion of the roll filter portion 23d near the winding core 23e in the use area by the guide claw 31t, the roll filter portion 23d can be easily mounted without loosening.

When performing maintenance, the roll filter portion 23d of the used area that has become dirty and used is removed.
What is necessary is just to remove from the casing 31, and to cut out the part. As described above, according to the present embodiment, as shown in FIG. 4, in the roll filter cassette C, almost the entire rear surface side of the roll filter 23 is exposed, so that the mounted state of the roll filter 23 can be seen. As a result, even if the user is unfamiliar, it is easy to understand how to pull out the roll filter 23 and how to mount the roll filter 23 during maintenance.
Easy maintenance.

Further, since the roll accommodating portion 31c is also exposed to the rear, it is easy to understand the holding state of the roll 23c only by looking at it, so that the roll 23c can be easily replaced. In particular, the core holding portion 31m having the groove 31n and the accommodation portion 31p is preferable because the holding state of the roll 23c is easily understood. Further, according to the support claws, since the structure for supporting is simple, it is easy to understand how to attach and detach the roll filter portion 23d in the use area, and maintenance can be easily performed.

The roll filter portion 23d in the use area can be securely and easily mounted by the cassette portion 31a having the guide claw 31t and the piercing claw 31s. by the way,
When substantially the entire surface of the roll filter 23 is exposed as in the present embodiment, the roll filter 23 tends to be loosened. In such a case, roll filter 2
If 3 comes loose and comes into contact with the photocatalyst element 25 or the like, a pressure loss may occur. Further, when the roll filter 23 includes the electrostatic filter 23a, if the electrostatic filter 23a cannot be reliably grounded due to looseness, the electrostatic filter 2
Electric charges may accumulate in 3a, and as a result, dust collection efficiency may be reduced.

In this embodiment, the support claws can support at least four corners of the roll filter portion 23d in the use area to prevent loosening. In particular, the guide claw 31 is used for the portion of the roll filter portion 23d near the winding core 23e in the use area.
By holding by t, it can be securely attached without loosening. Further, as shown in FIG. 2, the projection 52a comes into contact with the roll filter portion 23d in the use area, and thus it can be securely held without looseness as described above. In addition, by aligning the roll filter portion 23d in the use area along the casing 31 or the like, loosening can be reliably prevented. Therefore, problems such as pressure loss and reduced dust collection efficiency due to loosening can be reliably prevented.

Further, the electrostatic filter 23a of the roll filter 23 is pressed against the grid-like portion 32d, which is a grounding member of the opposite electrode plate portion 32, by the projection 52a, so that the electrostatic filter 23a can be reliably grounded. In addition, since the opposite electrode plate portion 32 is integrally unitized and provided in the roll filter cassette C, the roll filter 23 and the lattice-shaped portion 32d of the opposite electrode plate portion 32 can be brought close to each other and securely contacted. Thus, the electrostatic filter 23a can be reliably grounded. In particular, the roll filter portion 23d of the use area
Can be arranged along the grid-like portion 32d of the opposing electrode plate portion 32, so that the electrostatic filter 23a can be grounded more reliably. Therefore, the dust collection efficiency of the electrostatic filter 23a can be kept high.

Further, the casing 31 exposing substantially the entire surface of one side of the roll filter 23 is only required to be on one side of the roll filter 23. Therefore, as compared with the case where the casing is provided on both sides of the roll filter, a roll filter cassette is provided. The number of parts of C can be reduced and the cost can be reduced.
Further, the amount of resin in the casing can be reduced, and the cost of parts can be reduced.

In addition, the roll filter 23 is prevented from being loosened.
Projection 52a provided outside roll filter cassette C
Therefore, the structure for holding the roll filter 23 by the roll filter cassette alone can be simplified. In the above-described embodiment, in order to prevent the roll filter portion 23d in the use area from being loosened, the rear surface is provided with the protrusion 5 of the reinforcing member 52 of the photocatalytic element 25.
2a was in contact, but is not limited to this. For example, as shown in the perspective view of FIG. 5, a projection 12e, which is a columnar member projecting forward, is provided on a second portion 12c of the accommodation recess 12a of the rear case 12, and the tip of the projection 12e is used. You may make it contact | abut on the rear surface of the roll filter part 23d of the area | region.

In the above-described embodiment, the air cleaning apparatus has the function of purifying contaminants by the photocatalyst and the function of removing dust by ionization. However, the present invention is not limited to this. For example, in the case of configuring as an air cleaning device having only a dust removing function by ionization, the light source 2
6. The photocatalytic element 25, the deodorizing filter 23b, etc. can be omitted. In this case, a projection 12e is provided as shown in FIG. When the photocatalyst is configured as an air purifier having only a function of purifying contaminants, the ionization unit 22 and the electrostatic filter 2 are used.
3a and the like can be omitted.

In the above-described embodiment, the roll filter cassette C and the ionizing section 22 are integrally formed as a unit. However, the present invention is not limited to this. The roll filter cassette C and the ionization unit 22 may be configured separately. In this case, the roll filter cassette can be configured such that the ventilation surface of the roll filter on the ionization section side is exposed.

In addition, various design changes can be made without changing the gist of the present invention.

[0050]

According to the first aspect of the present invention, the following effects can be obtained. That is, in the roll filter cassette in which the substantially entire one of the ventilation surfaces of the roll filter is exposed and mounted, the mounted state of the roll filter is easy to understand, so that maintenance can be easily performed even by an unfamiliar person. Further, the number of parts of the roll filter cassette can be reduced, and the cost can be reduced.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the holding state of the roll by the groove and the accommodating portion is easy to understand, the roll can be easily replaced. According to the third aspect of the present invention, the following effects are obtained in addition to the effects of the first or second aspect of the invention.
That is, since the support claws support the four corners of the roll filter in the use area to prevent loosening, it is possible to prevent problems such as pressure loss and reduced dust collection efficiency caused by loosening.
Moreover, since the structure of the support claws is simple, it is easy to understand how to attach and detach the support claws, and maintenance can be easily performed.

According to the fourth aspect of the present invention, the following effects are obtained in addition to the effects of the third aspect of the present invention. That is, the roll filter cassette having the guide claws and the stab claws can securely and easily mount the roll filter in the use area. Further, since the roll filter in the use area can be easily mounted without looseness by the guide claw, problems such as pressure loss and reduction in dust collection efficiency due to looseness can be prevented.

According to the fifth aspect of the invention, the following effects are obtained in addition to the effects of the first aspect of the invention. In other words, the protrusion that comes into contact with the roll filter in the use area can prevent problems such as pressure loss and dust collection efficiency caused by loosening. Further, the structure for holding the roll filter in the roll filter cassette alone can be simplified. Further, when the roll filter cassette has a grounding member for grounding the roll filter, the projection can press the roll filter against the grounding member to reliably ground the roll filter.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an air cleaning device according to an embodiment of the present invention.

FIG. 2 is a sectional plan view of a schematic configuration of a dust collecting element, a photocatalytic element, and a light source of the air cleaning device of FIG.

FIG. 3 is a partial right side sectional view of a schematic configuration of the air cleaning device of FIG. 1;

FIG. 4 is a perspective view of a dust collecting element of the air cleaning device of FIG. 1, as viewed from the rear with a roll filter removed.

FIG. 5 is a perspective view of a rear case of an air purifying apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 air cleaning device 12a accommodation recess 12b first part 12c second part 12e projection 23 roll filter 23c roll 23d roll filter part of use area 23e core 31a cassette part (casing) 31c roll accommodation part 31d use area holding part 31m winding Core holding portion 31n Groove 31p Housing 31s Piercing claw (supporting claw) 31t Guide claw (supporting claw) 31x First surface 31y Second surface 32 Opposing electrode plate (grounding member) 52a Projection C roll filter cassette

Claims (5)

[Claims] A first and a second surface (31x, 3
1y) and a casing (31
a) and a roll (23c) formed at the end of the second surface (31y) of the casing (31a) and wound with the roll filter (23).
And a roll holding portion (31m) formed in the roll holding portion (31c) for detachably holding the roll core (23e) of the roll (23c). A use area holding portion (31d) for supporting the roll filter (23d) in the use area pulled out from the roll (23c) along the second face (31y) so that substantially the entire ventilation surface is exposed. And a roll filter cassette comprising: 2. A roll filter cassette according to claim 1.
In (C), the core holding part (31m) is formed in the inner part of the groove (31n) that opens forward of the second surface (31y), and the accommodation part (31e) for accommodating the core (23e). 31p) A roll filter cassette comprising: 3. The roll filter cassette (C) according to claim 1, wherein the use area holding portion (31d) is provided with support claws (31s, 31t) for supporting at least four corners of the roll filter (23d) in the use area. ). 4. A roll filter cassette according to claim 3,
In (C), the supporting claws (31s, 31t) hold both sides of the portion (23d) drawn out to the use area of the roll filter (23) on the side near the core (23e), and A pair of guide claws (31t) having an L-shaped cross section for guiding the filter (23) from the roll (23c); and a tip (23d) of a portion (23d) drawn out to a use area of the roll filter (23). A pair of piercing claws (31s) that are held through the edge. 5. A roll filter cassette (C) according to claim 1, and a housing recess (1) for housing the roll filter cassette (C).
2a), and the receiving recess (12a) has a first portion (12b) covering the exposed half surface of the roll (23c) and a second portion of the casing (31a) of the roll filter cassette (C).
Roll filter (23) along the surface (31y)
d) and a second part (12c) facing the second part (12c), and the second part (12c) is a roll filter (2
An air purifier characterized by having a projection (12e, 52a) abutting a part of 3d).