JP2005061700A - Air cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaner easy in handling of a prefilter such as removing coarse dust. <P>SOLUTION: This air cleaner is provided with the bag-shaped prefilter 10 installed so as to cover an air suction port 3, an exhaust inducting fan 14 connected to an air discharge port, a plate-like sub-filter 11 arranged in order from the upstream side of a casing inside air flow between the prefilter 10 and the inducing fan 14, an activated charcoal-containing filter 12, and a plate-like HEPA filter 13, in a casing 1 having the air suction port 3 and the air discharge port. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air cleaner, and more particularly to an air cleaner suitable for construction in an air-contaminated place such as maintenance or demolition work of a waste disposal facility contaminated with dioxin, dust, or the like.

  As an air cleaner used in construction in an air-contaminated place, a flat plate prefilter, a flat plate HEPA filter, a flat plate activated carbon filter and exhaust in a box-shaped casing having an air suction port and an air discharge port It is known that the induction fan is provided in order from the upstream side to the downstream side of the air flow in the casing. In this air cleaner, coarse dust is removed by a prefilter, fine dust is removed by a HEPA filter, and dioxin is adsorbed and removed by a filter containing activated carbon.

  In the conventional air cleaner as described above, since the plurality of filters are individually fixed to the casing, there is a problem that the removal and attachment work is troublesome and takes time. In the pre-filter, coarse dust accumulates on the upstream surface, but there is a deficiency that the removal of the coarse dust is troublesome and the hands get dirty. This type of air cleaner needs to be used by moving to a construction site. However, the conventional air cleaner is large and has the inconvenience of being troublesome to handle. In the filter with activated carbon, dust that adsorbs dioxin is generated and may flow downstream. However, since the filter with activated carbon is arranged at the most downstream of the filter group, the dust that adsorbs dioxin is removed from the air cleaner. May be discharged to the outside.

  An object of the present invention is to provide an air cleaner that can easily handle a prefilter, such as removal of coarse dust.

  An object of the present invention is to provide an air cleaner that is easy to handle such as moving.

  An object of the present invention is to provide an air cleaner that does not have a risk of discharging dust adsorbed with dioxins.

  The air cleaner according to claim 1 is a casing having an air suction port and an air discharge port, a bag-like or cylindrical prefilter mounted so as to cover the air suction port, and an exhaust gas connected to the air discharge port. And a flat activated carbon-containing filter and a flat HEPA filter disposed between the pre-filter and the attracting fan.

  The prefilter is preferably disposable.

  The activated carbon-containing filter and the HEPA filter may be arranged on the upstream side of the air flow in the casing, but the activated carbon-containing filter is preferably arranged on the upstream side.

  In this air purifier, the coarse dust is collected by a bag-like or cylindrical prefilter and accumulated therein, and therefore, the prefilter in which coarse dust is accumulated may be removed from the casing and discarded. In this way, it is not necessary to remove coarse dust from the prefilter, the prefilter is easy to handle, and hands are not soiled. In the case of a bag-shaped prefilter, a mouth strap may be attached thereto, and the mouth strap may be tied when removing the prefilter in which dust is accumulated from the casing. This makes the prefilter easier and safer to handle.

  A cover is provided on the upper surface of the casing, a filter mounting space is provided between the pre-filter and the induction fan in the casing, and the activated carbon-containing filter and the HEPA filter can be attached and removed from the upper surface opening of the casing. It is preferable that the filter is fixed to the casing in a stacked state. Then, the filter can be removed and attached simply by opening the casing lid and releasing the fixation. When the stacked filters are fixed to the casing using a wing bolt or the like, the removal and installation of the filters becomes easier.

  An air purifier according to claim 2 is characterized in that, in the air purifier according to claim 1, the filter containing activated carbon is arranged on the upstream side of the air flow in the casing with respect to the HEPA filter.

  In this case, even if dust adsorbing dioxin is generated from the filter containing activated carbon and flows downstream, it is reliably removed by the HEPA filter disposed downstream and is not discharged outside the air cleaner. .

  The air purifier according to claim 3 is the air purifier according to claim 1 or 2, wherein a flat sub-filter is provided between the pre-filter in the casing, the filter with activated carbon, and the HEPA filter. is there.

  In this case, since fine dust that has not been collected by the prefilter is removed by the subfilter, the burden on the filter containing activated carbon and the HEPA filter is reduced, and the service life thereof can be extended.

  Also in this case, a lid is provided on the upper surface of the casing, a filter mounting space is provided between the pre-filter and the induction fan in the casing, and the sub-filter, the activated carbon-containing filter and the HEPA filter can be attached and removed from the upper surface opening of the casing. In addition, it is preferable to fix the three filters to the casing in a stacked state.

  The air cleaner according to claim 4 is the one according to any one of claims 1 to 3, wherein the suction port of the induction fan is arranged toward the downstream side of the air flow in the casing. It is.

  In this case, since the air that has passed through the filter once flows to the downstream side of the attracting fan and then sucked into the attracting fan, the air flow that passes through the filter can be made uniform.

  The air purifier according to claim 5 is the one according to any one of claims 1 to 4, wherein the prefilter is a bag-like one having a mouth strap, and protrudes to the air intake port of the casing to the outside of the casing. A cylindrical suction duct is provided, and the bottom side of the prefilter is put into the casing through the inside of the suction duct, and the mouth of the prefilter is folded outside the suction duct, and the suction duct is fixed by fixing means. It is characterized by being fixed to.

  In this case, the pre-filter can be easily attached and removed from the outside of the casing, and when the pre-filter with the dust accumulated inside is removed from the casing, the mouth strap can be tied and discarded. Filter handling is easier and safer.

  The air cleaner according to a sixth aspect is characterized in that, in any one of the first to fifth aspects, a caster is provided at a lower portion of the casing.

  In this case, the air cleaner can be easily moved.

  According to a seventh aspect of the present invention, there is provided the air purifier according to the sixth aspect, wherein the casing is separated into a downstream portion provided with an induction fan and an upstream portion upstream of the air flow in the casing. A connecting means for detachably connecting two parts is provided, and a caster is provided at the lower part of each part.

  In this case, the two parts can be separated and moved easily. Therefore, even if the whole air cleaner becomes large, its movement and handling are easy.

  According to the air cleaner of claim 1, the prefilter is easy to handle, such as removing coarse dust accumulated in the prefilter, and the hands are not soiled.

  According to the air cleaner of claim 2, even if dust adsorbing dioxin is generated in the filter containing activated carbon and flows downstream, it is not discharged to the outside of the air cleaner.

  According to the air cleaner of claim 3, it is possible to reduce the burden of the filter containing activated carbon and the HEPA filter by the sub-filter, and to extend their life.

  According to the air cleaner of the fourth aspect, the air flow passing through the filter can be made uniform.

  According to the air cleaner of the fifth aspect, handling of the prefilter becomes easier and safer.

  According to the air cleaner of the sixth aspect, the air cleaner can be easily moved.

  According to the air cleaner of the seventh aspect, even if the entire air cleaner becomes large, its movement and handling are easy.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 6 show a first embodiment. 1 is a vertical sectional view of the air cleaner as viewed from the front, FIG. 2 is a horizontal sectional view thereof, FIG. 3 is a vertical sectional view of the air cleaner as viewed from the right side, and FIG. 4 is an enlarged view of a part of FIG. 5 is an enlarged view of a part of FIG. 1, and FIG. 6 is a view showing different states of the part of FIG.

  In the following description, the left and right refer to FIGS. 1 and 2, and the lower side of FIG. 2 is the front and the upper side of FIG.

  As shown in FIGS. 1 and 2, the air purifier includes a rectangular box-shaped main body casing (1) having an open top surface and a detachable upper lid (2) for opening and closing the top surface opening of the casing (1). ing. A circular air inlet (3) is formed at the center of the left side plate of the casing (1), and a circular air outlet (4) is formed at the upper right side of the front plate of the casing (2). The left side with the suction port (3) is the upstream side of the air flow in the casing, and the right side with the discharge port (4) is the downstream side. A cylindrical suction part duct (5) that passes through this and projects inward and outward is fixed to the suction port (3). A similar cylindrical discharge section duct (6) is also fixed to the discharge port (4). A caster (7) is provided on the lower surface of the casing (1) so that it can be easily moved. A moving handle (8) is provided on the upper outer surface of the left and right plates of the casing (1). The lid (2) is fixed by a fastener (not shown) with the upper surface opening of the casing (1) sealed, and is released from the casing (1) by releasing the fastener to open the upper surface opening of the casing (1). It is supposed to be.

  Inside the casing (1), a bag-like prefilter (10) for removing coarse dust, a flat subfilter (11) for removing fine dust that complements the prefilter (10), and a flat plate for removing dioxins and toxic organic gases A filter (12) containing the activated carbon, a flat plate HEPA filter (13) for removing fine dust, and an induction fan (14) for exhaust are provided in order from the left side which is the upstream side. The casing (1) includes a left pre-filter housing space (first space) (15), an intermediate filter mounting space (second space) (16), and a right fan housing space (third space) (17). The pre-filter (10) is divided into the first space (15), the three filters (11), (12) and (13) are located in the second space (16), and the fan (14) is located in the third space (17). Each is arranged.

  The pre-filter (10) is a disposable one formed in a bag shape with a circular cross section by a filter cloth, and a mouth string (18) is passed through the mouth of the pre-filter (10) so as to be tied. In addition, a circular sheet (19) for making the air flow uniform is fixed to the center of the inner surface of the bottom of the prefilter (10). The sheet (19) is made of, for example, a synthetic resin, and in this example is made of polyethylene. The diameter of the sheet (19) is, for example, about ½ of the diameter of the prefilter (10). The prefilter (10) is passed from the outside of the casing (1) into the suction portion duct (5), and most of the prefilter (10) except the mouth side is located in the first space (15). The mouth of the pre-filter (10) is opened and folded back to the outside of the portion of the duct (5) protruding outside the casing (1). Then, the downstream end of the air introduction duct (20) is fitted to the outside of the folded mouth of the prefilter (10), and the band (21) attached to the outside of the end of the duct (20) is attached. By tightening, the suction duct (5) and the air introduction duct (20) are hermetically connected and fixed, and the mouth side of the prefilter (10) is fixed to the suction duct (5).

  A rectangular frame-shaped filter support member (22) is fixed to the inner surface of the rightmost casing (1) of the second space (16). A plate-like bolt support member (23) having a small front and rear width and a long top and bottom is fixed to the inner surfaces of the front and rear plates of the leftmost casing (1) of the second space (16). The filter fixing butterfly bolt (25) is screwed from the left side to the nut (24) fixed at two upper and lower positions of) and protrudes to the right side of the support member (23). A portion near the upper end and a portion near the lower end of each bolt support member (23) are inclined to the left, and gradually increase as the distance from the left and right with respect to the filter support member (22) approaches the end. A plate rubber filter holding member (26) is fixed to an intermediate portion of the height of the inner surface of the front plate and the rear plate of the casing (1) between the filter support member (22) and the bolt support member (23). ing.

  The sub-filter (11) is formed in a plate shape from non-woven fabric, for example. Although the detailed illustration is omitted, the activated carbon-containing filter (12) and the HEPA filter (13) have a rectangular outer frame, and a gasket is formed on the right side of the outer frame of each filter (12) (13). (27) and (28) are fixed respectively. The three filters (11), (12), and (13) are mounted in the second space in a state of being stacked in the left-right direction, and the front and rear surfaces of the filters (11), (12), and (13) are attached to the holding member (26). It is in pressure contact. Then, by tightening the butterfly bolt (25) and pushing the front part and the rear part of the sub-filter (11) to the right side, the three filters (11), (12) and (13) are connected to the filter support member (22) and the butterfly bolt. The gasket (27) of the HEPA filter (13) is fixed to the filter support member (22), and the gasket (26) of the filter (14) with activated carbon is attached to the outside of the HEPA filter (13). The left and right seals are made by press-contacting each frame.

  The fan (14) is directly driven by the motor, and is fixed on the lower plate of the casing (1) of the third space (17) via vibration-proof rubber (not shown). The suction port (30) of the fan (14) faces the right side opposite to the HEPA filter (13), and the discharge port (31) is connected to the discharge port (4) of the casing (1).

  A fine differential pressure gauge (32) is provided on the inner surface of the front plate of the casing (1) in the first space (15).

  When the air cleaner is operated, the fan (14) is driven in a state where the lid (2) is fixed at the closed position and the casing (1) is sealed. When the fan (14) is driven, contaminated air is sucked into the casing (1) from the introduction duct (20) through the suction port (3), and the pre-filter (10), sub-filter (11), activated carbon After passing through the filter (12) and the HEPA filter (13) in order, the purified air enters the fan (14) through the suction port (30) and passes through the discharge port (31) and the discharge port (4). It is discharged out of the machine.

  In the prefilter (10), coarse dust having a particle diameter of about 3 μm or more is collected and collected in the prefilter (10). Since the sheet (19) is fixed to the center of the inner surface of the bottom of the pre-filter (10) and air does not flow through the portion of the sheet (19), the air flow to the sub-filter (11) on the downstream side is made uniform. The However, the sheet (19) is not always necessary. In the sub-filter (11), fine dust that has not been collected by the pre-filter (10) is removed. The activated carbon filter (12) adsorbs and removes dioxins and harmful organic gases. In the HEPA filter (13), fine dust that has passed through the filters (10), (11), and (12) is removed. Even if dust that adsorbs dioxins is generated by the filter (12) containing activated carbon, it is removed by the downstream HEPA filter (13), so that it is not discharged into the third space (17).

  The clean air that has passed through the HEPA filter (13) is not immediately sucked into the fan (14), but once flows to the downstream side of the third space (17) and from the suction port (30) facing the downstream side. Since the air is sucked into the fan (14), the air flow passing through the filters (11), (12), and (13) can be made more uniform.

  The degree of contamination of the prefilter (10) is detected by the micro differential pressure gauge (32), and the replacement time of the prefilter (10) is informed based on the detection result. When replacing the pre-filter (10), first loosen the band (21), remove the introduction duct (20) from the suction duct (5), and turn the folded portion of the mouth of the pre-filter (10) into the duct (5). The strap (18) is tied off, the prefilter (10) is pulled out of the machine through the duct (5), sealed in a prepared polyethylene bag or the like and discarded. Then, as described above, the new prefilter (10) is mounted, and the introduction duct (20) is connected to the suction section duct (5). At this time, the lid (2) may remain fixed in the closed position.

  In this way, the prefilter (10) can be easily replaced from the outside with the lid (2) of the casing (1) closed. Further, since the mouth strap (18) of the bag-like prefilter (10) is tied and discarded, the safety is extremely high.

  To remove and install the three filters (11), (12) and (13), open the lid (2) of the casing (1), loosen the butterfly bolt (25) and move it to the left side. Through the top opening. When the wing bolt (25) is loosened, each filter (11) (12) (13) becomes free, so the desired filter (11) (12) (13) can be pulled out and removed, Desired filters (11), (12) and (13) can be inserted and attached to the empty space in the second space (16) from above.

  Thus, since the three filters (11), (12), and (13) are not individually fixed to the casing (1), the removal and attachment operations are simple.

  Cleaning and repairing of the fan (14) and the internally mounted products are performed with the lid (2) open, as with the replacement of the filters (11), (12), and (13).

  In the said embodiment, although the filter (12) containing activated carbon is arrange | positioned in the upstream of the HEPA filter (13), these arrangement | positioning may be reverse. Further, since the sub-filter (11) that complements the pre-filter (10) is provided on the upstream side of the activated carbon filter (12) and the HEPA filter (13), the activated carbon filter (12) and the HEPA filter (13) This reduces the burden and improves the service life of these. However, the sub-filter (11) is not always necessary.

  In the above embodiment, the entire upper surface opening of the casing (1) is covered with one lid (2), but the lid may be divided into a plurality. For example, it may be divided into a lid that covers the first space (15) and the second space (16) and a lid that covers the third space (17).

  7 and 8 show modified examples of the prefilter.

  In this example, the prefilter (33) is a disposable one formed in a bottomed cylindrical shape by a filter cloth, and a detachable flange (34) is fixed to the mouth portion thereof. A hook portion (35) extending in the clockwise direction as viewed from the right side after protruding outward is integrally formed at a position at which the flange (34) is divided into four equal parts in the circumferential direction. Further, the same sheet (36) is fixed to the inner surface of the bottom of the prefilter (33).

  A suction duct (38) with a fixing flange (37) fixed to the right end is inserted into the suction port (3) of the casing (1) from the inside, and the flange (37) is connected to the inner surface of the left side plate of the casing (1). The duct (38) is fixed in a state of protruding outward from the casing (1). Then, the introduction duct (20) is fitted on the outer side of the suction part duct (38) protruding outward from the casing (1), and the band (21) attached to the outer side thereof is tightened, whereby the suction part duct (38) and The introduction duct (20) is connected and fixed in a sealed manner.

  At the position where the flange (37) is divided into four equal parts in the circumferential direction, the bolt (39) is fixed to the hook (35) of the flange (34) of the prefilter (33) with the bolt (39) protruding to the right. The wing nut (40) is screwed to each bolt (39). ing. Then, by attaching a bolt (39) to the hook portion (35) of the flange (34) of the prefilter (33) and tightening the wing nut (40), the flange (34) of the prefilter (33) is 37) is fixed.

  Replacement of the prefilter (33) is performed with the lid (2) of the casing (1) opened and the wing nut (40) loosened with the introduction duct (20) connected to the suction duct (5). . When the wing nut (40) is loosened, the flange (34) can rotate freely with respect to the flange (37). The filter (33) can be easily removed, and the prefilter (33) can be easily attached by performing the reverse operation. The used prefilter (33) is enclosed in a prepared polyethylene bag and discarded.

  Others are the same as the case of the said embodiment.

  7 and 8 show the cylindrical pre-filter (33). However, when the pre-filter is formed into a cylindrical shape, it is not limited to the cylindrical shape, and other arbitrary shapes such as a rectangular tube shape should be adopted. Can do.

  FIG. 9 shows a second embodiment.

  In this embodiment, the casing (1) is divided into a left part (1a) including the first space (15) and the second space and a right part (2b) including the third space, and each part (1a) ( A plurality of casters (7) are provided in 1b) so that each part can be moved individually. The two portions (1a) and (1b) can be detachably connected by appropriate connecting means. In this example, flanges (41) and (42) are formed at the right end of the left portion (1a) and the left end of the right portion (1b), respectively, and these flanges (41) and (42) are combined to form a bolt (43). By fixing with a nut (44), the two parts (1a) (1b) are connected.

  In this case, since the casing (1) is separated into two parts (1a) and (1b), the movement and handling thereof are easy even if the entire air cleaner becomes large.

  Others are the same as in the case of the first embodiment, and the same portions are denoted by the same reference numerals.

FIG. 1 is a vertical sectional view seen from the front of an air purifier showing a first embodiment of the present invention. FIG. 2 is a horizontal sectional view of the air cleaner of FIG. FIG. 3 is a vertical sectional view of the air cleaner of FIG. 1 as viewed from the right side. FIG. 4 is an enlarged view of a part of FIG. FIG. 5 is an enlarged view of a part of FIG. FIG. 6 is a drawing showing different states of the portion of FIG. FIG. 7 is a vertical sectional view seen from the front showing a modification of the prefilter. FIG. 8 is a vertical sectional view of the prefilter of FIG. 7 as viewed from the right side. FIG. 9 is a vertical sectional view seen from the front of the air cleaner showing the second embodiment of the present invention.

Explanation of symbols

(1) Casing
(1a) Left part
(1b) Right side
(3) Air inlet
(4) Air outlet
(5) Suction duct
(7) Casters
(10) Prefilter
(11) Subfilter
(12) Activated carbon filter
(13) HEPA filter
(14) Attraction fan
(18) Mouth string
(21) Band
(30) Suction port
(33) Prefilter
(41) (42) Flange
(43) Bolt
(44) Nut

Claims (7)

  In a casing having an air suction port and an air discharge port, a bag-like or cylindrical prefilter mounted to cover the air suction port, an exhaust induction fan connected to the air discharge port, a prefilter and an attraction An air cleaner comprising a flat activated carbon filter and a flat HEPA filter arranged between fans.   2. The air purifier according to claim 1, wherein the activated carbon filter is disposed upstream of the air flow in the casing with respect to the HEPA filter.   The air cleaner according to claim 1 or 2, wherein a flat sub-filter is provided between the pre-filter in the casing, the activated carbon-containing filter, and the HEPA filter.   The air cleaner according to any one of claims 1 to 3, wherein the suction port of the induction fan is disposed toward the downstream side of the air flow in the casing.   The prefilter has a bag-like shape having a mouth strap, and a cylindrical suction portion duct protruding outside the casing is provided at the air suction port of the casing, and the bottom side of the prefilter passes through the inside of the suction portion duct and enters the inside of the casing. The air purifier according to any one of claims 1 to 4, wherein the mouth portion of the pre-filter is folded outside the suction portion duct and fixed to the suction portion duct by a fixing means. Machine.   The air cleaner according to any one of claims 1 to 5, wherein a caster is provided at a lower portion of the casing.   The casing is separated into a downstream part provided with an induction fan and an upstream part upstream of the air flow in the casing, and a connecting means for detachably connecting these two parts is provided. The air cleaner according to claim 6, wherein a caster is provided at a lower portion of the air cleaner.

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