JP7365473B1 - Air purifier and air purifier installation structure - Google Patents

Abstract

[Problem] To provide an air cleaner in which a high-performance filter can be easily replaced even in a limited work space, regardless of the skill level of a worker, and the occurrence of bypass leaks can be prevented. The present invention includes a casing 11 and a high-performance filter 12 inserted into the casing. The high-performance filter 12 is fixed to the casing 11 by a filter fixing part 25, and the filter fixing part 25 presses the filter holder 26 against the high-performance filter 12 and presses the other edge of the filter holder 26 onto the casing 11. A clamping tool 30 is provided for tightening and fixing, and by pressing the filter holder 26 against the high-performance filter 12 and pressing the airtight retaining member 21 with the clamping tool 30, the support surface 20 and the outer peripheral part of the lower surface of the high-performance filter 12 are connected. Closely attached. [Selection diagram] Figure 1

Description

TECHNICAL FIELD The present invention relates to an air cleaner for air purification that sucks air from a room or the like, removes dust, etc. contained in the air, and blows out clean air, and an installation structure for the air cleaner.

Air purifiers have an intake port that takes in air, and the air taken in from the intake port is filtered with a high-performance filter such as a HEPA filter installed inside, and the purified air is discharged to the outside of the aircraft. It has become.
As an example of such an air cleaner, one described in Patent Document 1 is known. This air purifier consists of an air purifier main body, a panel that is attached to the air purifier main body so as to be openable and closable and is formed with an air inlet for sucking air, and a panel that is provided on the panel to remove dust that is sucked in from the air inlet. The air purifier includes a pre-filter that filters dust, and a high-performance filter that is provided on the air cleaner body and filters dust that has passed through the pre-filter.

JP2020-99858A

By the way, in order to simplify the maintenance of the air purifier, a high-performance filter is fitted into a groove of a Kendon structure, as shown in FIG. 11. With this type of filter mounting structure, around 5 to 20% of bypass leak airflow that does not pass through the high-performance filter occurs, and the dust collection efficiency of the air purifier is lower than that of a single filter. There is a problem.
For this reason, in industrial air cleaners that cannot tolerate bypass leaks, a high-performance filter is fixed using an L angle and packing to make it airtight so that no gaps occur.
In this filter mounting structure, as shown in Figure 12, high performance is achieved by gradually and evenly tightening the nut 2 that fixes the L angle 1 in the order of (1) to (4). There are problems in that it is necessary to bring the filter 3 into close contact with the packing 4, which requires a skilled worker and a work space where tools can be used.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to easily replace a high-performance filter even in a limited work space without being influenced by the skill level of the worker, and to prevent bypass leaks. The purpose is to provide an installation structure for purifiers and air purifiers.

In order to achieve the above object, an air cleaner according to the present invention is an air cleaner including a casing and a high-performance filter inserted inside the casing,
The casing has a support surface that supports a lower peripheral portion of the high-performance filter,
The high-performance filter inserted into the casing is fixed to the casing by a filter fixing part,
The filter fixing part is
an airtight maintenance member that is provided on the outer periphery of the lower surface of the high-performance filter and/or the support surface and maintains airtightness between the support surface and the outer periphery of the lower surface of the high-performance filter;
a filter holder whose one edge is attached to the upper part of the casing via a rotating part so as to be rotatable up and down about the rotating part;
a tightening tool that tightens and fixes the other edge of the filter holder to the casing while the filter holder is pressed against the high-performance filter;
By pressing the filter holder against the high-performance filter using the tightening tool and pressing the air-tight maintenance member, air-tightness is maintained between the support surface and the outer periphery of the lower surface of the high-performance filter. Features.

Here, "providing an airtight member on the outer periphery of the lower surface and/or the support surface of the high-performance filter" refers to a case where an air-tight member is provided on both the outer periphery of the lower surface and the supporting surface of the high-performance filter, respectively; This includes cases where the air-tight maintaining member is provided only on the outer periphery of the lower surface of the high-performance filter, and cases where the air-tight maintaining member is provided only on the supporting surface.

In the present invention, by pressing the filter holder against the high-performance filter using a tightening tool and pressing the airtight retaining member, the support surface and the outer circumference of the lower surface of the high-performance filter are brought into airtight contact. It is possible to maintain airtightness between the filter and the outer periphery of the lower surface of the performance filter, thereby preventing the occurrence of bypass leaks.
In addition, the filter holder is rotated downward about the rotating part to press it against the high-performance filter, press the air-tight retaining member, and maintain the air-tightness between the support surface and the outer periphery of the lower surface of the high-performance filter. Since the bypass leakage is held, the occurrence of bypass leakage can be prevented regardless of the skill level of the operator.
In addition, by rotating the filter holder that presses the high-performance filter upwards around the rotating part, the filter holder can be separated from the high-performance filter, so it can be used even in spaces where work space is limited. High-performance filters can be easily replaced.

Further, in the configuration of the present invention, the other edge of the filter presser is attached to the one edge portion of the high-performance filter on the rotating portion side and/or the filter presser plate by the tightening tool. A pressing member may be provided that presses one edge of the high-performance filter toward the airtight maintenance member by tightening and fixing the filter.

Here, "a pressing member is provided on one edge of the high-performance filter on the rotating part side and/or on one edge of the filter presser" means one edge of the high-performance filter and one edge of the filter presser. This includes cases where pressing members are provided at each edge, cases where a pressing member is provided only at one edge of the high-performance filter, and cases where a pressing member is provided only at one edge of the filter holder.

There is a possibility that the pressing force of the filter holder is insufficient on the rotating part side of the filter holder, but according to the above configuration, by tightening and fixing the other edge of the filter holder to the casing using the tightening tool, a high-performance filter can be secured. Since a pressing member is provided that presses one edge toward the airtightness maintaining member, the airtightness between the support surface and the outer periphery of the lower surface of the high-performance filter can be reliably maintained even on the rotating part side. Can be done.

Further, in the configuration of the present invention, the tightening tool may be provided on the front of the casing and covered by a front decorative cover that is detachably attached to the front of the casing.

With this configuration, the fastening tool allows the high-performance filter to be easily installed and removed from the front side of the casing, and the fastening tool can be covered and hidden by the front decorative cover. , the design is excellent.

Further, in the configuration of the present invention, side decorative covers are provided on both sides of the casing,
Lower portions of the front decorative cover and the side decorative cover protrude downward from the lower surface of the casing,
An intake port for taking in outside air is provided at the lower part of the front decorative cover and the side decorative cover,
An inlet may be provided on the lower surface of the casing to allow air taken in from the intake port to flow into the casing.

According to such a configuration, the lower parts of the front decorative cover and the side decorative cover protrude downward from the lower surface of the casing, so when the air purifier is installed on an installation surface such as a floor, stand, shelf, etc., the lower surface of the casing is Move away from the installation surface. Since the inflow port is provided on the lower surface of the casing, the air taken in from the intake port can be reliably flowed into the inside of the casing through the inflow port.

Further, an air purifier installation structure according to the present invention is an air purifier installation structure in which the air purifier is installed on a luggage rack of a train,
The air cleaner is installed on the luggage shelf with the front decorative cover of the air cleaner facing the loading/unloading opening side of the luggage shelf,
A gap may be provided between an upper surface of the air cleaner installed on the luggage shelf and a ceiling surface of the luggage shelf, through which air can circulate.

According to such a configuration, the air cleaner is installed on the luggage rack with the front decorative cover facing the loading/unloading port side of the luggage rack, so that the air inside the train is taken in through the air intake port of the air cleaner. It is possible to flow into the inside of the casing from the inlet. A high-performance filter inserted inside the casing removes dust contained in the air and blows it out as clean air. Since a gap is provided between the train and the ceiling surface through which air can circulate, clean air passes through this gap and spreads throughout the train, making it possible to reliably clean the air inside the train.

Furthermore, in the configuration of the present invention, an intersection between an upper edge and a rear edge of the side decorative cover of the air cleaner protrudes rearward from the back surface of the casing;
The shape of the intersection may be approximately the same as the shape of the intersection between the ceiling surface and the back side of the luggage rack.

Here, "the shape of the intersection is approximately equal to the shape of the intersection between the ceiling surface and the rear side of the luggage rack" means, for example, the intersection between the upper edge and the rear edge of the side decorative cover. If k1 is an arc, the shape of the intersection k2 between the ceiling surface and the back side of the luggage rack is an arc, and the arc radii of the intersections k1 and k2 are equal, or the difference in the arc radii is within ±30 mm. It means something.

According to this configuration, the shape of the intersection between the upper edge and the rear edge of the side decorative cover, which protrudes rearward from the back of the casing, is the same as the intersection between the ceiling surface and the back side of the luggage rack. Since the shape is almost the same as that of , the air cleaner can be placed close to the luggage rack, and the intersection of the air cleaner can be placed close to the intersection of the luggage rack. For this reason, the air purifier can be easily stored in the luggage rack.

According to the present invention, a high-performance filter can be easily replaced even in a limited work space regardless of the skill level of the operator, and bypass leaks can be prevented from occurring.

1 is a side sectional view showing essential parts of an air cleaner according to an embodiment of the present invention. It is a perspective view of the same air cleaner. It is a perspective view of the air cleaner with the front decorative cover removed. It is a perspective view of the air cleaner showing a state in which the high-performance filter is removed. It is a front view of the air cleaner with the front decorative cover removed. It is a side view of the same air cleaner. It is a back view of the same air cleaner. 1 is a sectional view showing an installation structure of an air cleaner according to an embodiment of the present invention. It is a top view of the same. It is a graph showing changes in dust concentration on a train in an experimental example. FIG. 2 is a cross-sectional view showing a conventional high-performance filter mounting structure. FIG. 2 is a perspective view for explaining a conventional method of attaching a high-performance filter.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side sectional view showing the main parts of the air cleaner according to the present embodiment, FIG. 2 is a perspective view of the air cleaner, FIG. 3 is a perspective view of the air cleaner with the front decorative cover removed, and FIG. Figure 5 is a front view of the air cleaner with the front decorative cover removed, Figure 6 is a side view of the air cleaner, and Figure 7 is a perspective view of the air cleaner with the high-performance filter removed. FIG. 3 is a rear view of the cleaner.

As shown in FIGS. 1 to 7, the air cleaner 10 according to the present embodiment includes a casing 11, a high-performance filter 12 such as a HEPA filter that is removably inserted into the casing 11, and It includes a fan 13 provided inside the casing 13 below the high-performance filter 12, and a front decorative cover 15 and side decorative covers 17, 17 attached to the front and left and right sides of the casing 11, respectively. A woodgrain sheet is attached to the surface of the front decorative cover 15 and the surfaces of the side decorative covers 17, 17, respectively.

The casing 11 has a support surface 20 that supports the outer periphery of the lower surface of the high-performance filter 12 . This support surface 20 is formed into a rectangular ring shape and is arranged substantially horizontally. Since the support surface 20 is formed into a rectangular ring shape, the inside thereof has a rectangular hole 20a that penetrates vertically, and the lower surface of the high performance filter 12 faces the hole 20a. Further, the back surface of the casing 11 projects upward from the support surface 20, and forms a vertical wall 11b.
The distance between the support surface 20 and the top of the vertical wall 11b is slightly longer than the thickness of the high performance filter 12. Therefore, by inserting the high-performance filter 12 into the interior of the casing 11 and placing it on the support surface 20, the high-performance filter 12 is housed within the casing 11 substantially horizontally.

The high-performance filter 12 includes a rectangular plate-shaped filter body 12a serving as a filter material, a rectangular frame-shaped frame 12b fixed to the outer periphery of this filter body 12a, and an airtight filter fixed to the lower surface of this frame 12b. A holding member 21 is provided. The airtight maintenance member 21 is a plate-shaped packing material made of an elastic member, and is formed in a rectangular ring shape, and its upper surface is adhered to the lower surface of the frame 12b.
The high-performance filter 12 is supported from below by the support surface 20 by placing the airtight maintenance member 21 on the support surface 20 .

The high-performance filter 12 inserted into the casing 11 is fixed by a filter fixing part 25.
The filter fixing part 25 includes the airtight maintaining member 21, a filter presser 26, and a tightening tool 30.
The airtight maintenance member 21 is bonded to the lower surface of the frame 12b of the high-performance filter 12, but instead of this, it may be bonded to the upper surface of the support surface 20 facing the frame 12b. The member 21 may be composed of two sheets, one of which is adhered to the lower surface of the frame 12b, and the other of which is adhered to the upper surface of the support surface 20.

The filter holder 26 has one edge (the right edge in FIG. 1) attached to the upper part of the vertical wall 11b of the casing 11 via a rotating part 28 such as a hinge, so that it can move up and down with the rotating part 28 as an axis. It is rotatably provided, and hooks 29, 29 are fixed to the other edge (the left edge in FIG. 1).
As shown in FIGS. 2 to 4, the filter holder 26 is formed into a rectangular frame shape, and the front portion and left and right side portions are each formed into an L-shape in cross section. The upper wall portion 26a forming one piece of the L-shape presses down the upper surface edge of the high-performance filter 12 from above, and the side wall portion 26b forming the other L-shape portion holds the upper side of the high-performance filter 12. It has become. The filter holder 26 is formed into a rectangular frame shape, and has a rectangular opening on the inside thereof, and this opening faces the upper surface of the high-performance filter 12, exposing the upper surface to the outside.
Further, two hooks 29 are fixed to the side wall portion 26b of the front edge portion of the filter presser 29, spaced apart from each other in the left and right directions.

The tightening tool 30 is used to tighten and fix the other edge of the filter holder 26 (the left edge in FIG. 1) to the casing 11 while the filter holder 26 is pressed against the high-performance filter 12. It is configured.
That is, as shown in FIGS. 3 and 5, mounting fittings 31, 31 are fixed to the front surface (front surface) of the casing 11 so as to be spaced apart from each other in the left and right directions. A lever 32 is attached to the mounting bracket 31 so as to be rotatable up and down about a shaft 32a. A tightening rod 33 is attached to this lever 32 so as to be rotatable about a rotation support member 34 . A triangular ring-shaped locking portion 35 that can be locked to the hook 29 is attached to the tip of the tightening rod 33 so as to be rotatable about a shaft 35a. The tightening rod 33 is screwed into the rotation support member 34, and the tightening force of the tightening rod 33 can be adjusted by adjusting the length of the screw.
Furthermore, since the rotation support member 34 is disposed closer to the tip of the lever 32 (lower end in FIGS. 3 and 5) than the shaft 32a of the lever 32, the lever 32 can be rotated upward about the shaft 32a. When this is done, the tightening rod 33 moves upward, and when the lever 32 is rotated downward about the shaft 32a, the tightening rod 33 is moved (pulled) downward.

In such a tightening tool 30, the lever 32 is rotated upward to hook and lock the locking part 35 to the hook 29 fixed to the filter holder 26, and then the lever 32 is rotated downward. By pulling the tightening rod 33 downward, the hook 29 with which the locking part 35 is locked is drawn downward, thereby pressing the filter holder 26 against the high-performance filter 12 and sealing the airtight holding member 21. By pressing, the support surface 20 and the outer periphery of the lower surface of the high-performance filter 12 are brought into airtight contact.

Further, as shown in FIG. 1, a pressing member 40 is provided by adhesive on one edge (right edge in FIG. 1) of the frame 12b of the high-performance filter 12 on the rotating portion 28 side. The pressing member 40 is a packing material formed of a band-like elastic member, and its lower surface is adhered to the upper surface of the frame 12b.
The pressing member 40 is adhered to the upper surface of the frame 12b of the high-performance filter 21, but instead of this, it may be adhered to the lower surface of the filter holder 26 facing the frame 12b, or the pressing member 40 may be It may be configured with two members, one of the pressing members 40 being adhered to the upper surface of the frame 12b and the other pressing member 40 being adhered to the lower surface of the filter holder 26.
Such a pressing member 40 is configured to press one edge of the high-performance filter 12 toward the airtight maintenance member 21 by tightening and fixing the other edge of the filter holder 26 to the casing 11 using the tightening tool 30. It has become.

Further, a fan 13 is fixed to the bottom surface inside the casing 11, as shown in FIGS. 5 and 6. As the fan 13 rotates, it sucks in air from below and blows it out from the outer circumferential side.The blown air containing dust is filtered by a high-performance filter 12, that is, the dust is removed, and the air is blown out from the outside. The air is blown out from the top surface of the performance filter 12 to the outside.

Further, the bottom wall of the casing 11 is open at a portion where the fan 13 is installed, and an intake port 13a provided on the lower surface of the fan 13 faces this opening 11a. A pre-filter 18 is provided on the lower surface of the casing 11, facing the opening 11a. The pre-filter 18 is for removing relatively large dust particles, and its left and right edges are supported by supporting members 19 each having a U-shaped cross section. The pre-filter 18 can be slid in a direction perpendicular to the front of the casing 11 by having its left and right edges supported by support members 19, 19, and can be removed from the casing 11 by pulling it out toward you and sliding it. In the removed state, the prefilter 18 can be inserted into the casing 11 by inserting it between the support members 19 and 19 and sliding it toward the back. That is, the prefilter 18 is provided in the casing 11 in a removable manner. Therefore, the prefilter 18 can be easily replaced.

As described above, the tightening tool 30 is provided on the front surface (front surface) of the casing 11, as shown in FIGS. It is being said.
The front decorative cover 15 is detachably attached to the casing 11 in the following manner. That is, the front decorative cover 15 has left and right side edges and an upper edge bent toward the rear (direction along the upper edge of the side decorative cover 17 in FIG. 2, rightward in FIG. 6). They are curved pieces 15a, 15a, and 15b. The bent pieces 15a, 15a are stacked on the surface edges of the left and right side decorative covers 17, 17, and the bent piece 15b is stacked on the top edge of the casing 11. Further, an L-shaped hole 15c is formed in the upper part of the bent piece 15a, and this hole 15c opens at the vertical edge of the bent piece 15a. A screw s is inserted into the hole 15c and then screwed into the side decorative cover 17. Further, a screw s is inserted through the lower end of the bent piece 15a and then screwed into the side decorative cover 17. Furthermore, screws s are inserted into both left and right ends of the bent piece 15b, and then screwed into the casing 11. In this way, the front decorative cover 15 is attached to the casing 11.

When removing the front decorative cover 15 from the casing 11, remove the screws s at both left and right ends of the bent piece 15b, remove the screw s at the lower end of the bent piece 15a, and then remove the screw s at the upper end of the bent piece 15a. loosen. Next, pull up the front decorative cover 15 slightly, align the opening of the hole 15c of the bent piece 15a with the position of the screw s, and then pull the front decorative cover 15 toward you, so that the screw s is inserted into the hole. 15c, and the front decorative cover 15 can be removed.

Furthermore, a plurality of intake ports 15a are provided at the lower part of the front decorative cover 15 to take in outside air. The intake ports 15a are formed in a square shape, and a plurality of intake ports 15a are arranged vertically and horizontally at predetermined intervals. The shape of the intake port 15a may be other than square, for example, rectangular or circular.
Further, the left side corner of the front decorative cover 15 when viewed from the front is cut out into a vertically long rectangular shape, and an operation indicator light 45 and an abnormality indicator light 46 are exposed in this cutout.

A plurality of intake ports 17a for taking in outside air are provided at the lower part of the side decorative cover 17. The intake ports 17a are formed in a square shape, and a plurality of intake ports 17a are arranged vertically and horizontally at predetermined intervals. The shape of the intake port 17a may be other than square, for example, rectangular or circular.
Further, as shown in FIG. 4, a bottom plate 50 is provided between the lower edges of the side decorative covers 17, 17 in parallel to the bottom wall of the casing 11, and the left and right edges of the bottom plate 50 are connected to the side decorative covers. It is integrally connected to the lower edges of 17, 17. Therefore, the left and right pair of side decorative covers 17, 17 and the bottom plate 50 constitute an outer shell 51 having a concave cross section, and the casing 11 is inserted and fixed into approximately the upper half of the outer shell 51.
Further, at the lower left corner of the front side of the outer shell 51, a mounting plate 52 that stands upwardly is integrally formed with the outer shell 51. A light 46 is attached.

Furthermore, an inlet 11a is provided on the lower surface of the casing 11 to allow air taken in from the intake ports 15a and 17a to flow into the inside of the casing 11. That is, as described above, the bottom wall of the casing 11 is open at the portion where the fan 13 is installed, and this opening 11a serves as the inlet 11a.

Further, as shown in FIG. 7, a horizontally long rectangular plate-shaped reinforcing plate 53 is provided on the back side of the air cleaner 10, and the left and right edges of the reinforcing plate 53 are connected to a pair of left and right side decorative plates 17, 17. As a result, the outer shell 51 is reinforced. Further, a wood grain sheet is pasted on the surface of the reinforcing plate 53.
In addition, in FIG. 5, the reference numeral 55 indicates an operation switch, the reference numeral 56 an air volume adjustment volume, and the reference numeral 57 a terminal block.

The air cleaner 10 configured as described above is installed on a luggage rack 81 of a train 80, for example, as shown in FIG.
In this case, the air cleaner 10 is installed on the luggage shelf 81 with the front decorative cover 15 of the air cleaner 10 facing the loading/unloading port side of the luggage shelf 81, and the air cleaner 10 installed on the luggage shelf 81 is A gap g is provided between the top surface and the ceiling surface 81a of the luggage rack 81, through which air can circulate.
Further, an intersection k1 between the upper edge and the rear edge of the side decorative cover 17 of the air purifier 10 protrudes rearward from the back surface of the casing 11, and the shape of the intersection k1 is similar to the ceiling of the luggage rack 81. The shape is almost the same as the intersection k2 between the surface and the rear side surface.

Further, as shown in FIG. 9, in a plan view of the cabin of the train 80, the luggage shelves 81, 81 extend to the front and rear of the train 80 (left and right in FIG. 9) and are provided above the seats. 80 and are spaced apart from each other in the width direction.
A plurality of air cleaners 10 (three on each side in FIG. 9, six in total) are arranged on the luggage rack 81 at predetermined intervals in the longitudinal direction of the train 80. Further, the air cleaner 10 installed on one baggage shelf 81 and the air cleaner 10 installed on the other baggage shelf 81 are arranged to face each other in the width direction of the train 80.
As mentioned above, the clean air blown out from the top surface of the air cleaner 10 is transferred to the air cleaner 10 because a gap g is provided between the top surface of the air cleaner 10 and the ceiling surface 81a of the luggage rack 81 to allow air to circulate. Therefore, it flows from the baggage shelf 81 toward the passenger seat side below, flows also in the extending direction of the baggage shelf 81 (the longitudinal direction of the train 80), and then flows toward the passenger seat side below.

When installing and fixing the air cleaner 10 on the luggage rack 81, as shown in FIGS. 2 to 7, fixing metal fittings 58 are attached to each of the four lower corners of the air cleaner 10, and these fixing metal fittings are 58 to the luggage rack 81 with screws.

As described above, according to this embodiment, the following effects are achieved.
By pressing the filter holder 26 against the high-performance filter 12 using the tightening tool 30 and pressing the air-tight retaining member 21, the support surface 20 and the outer circumference of the lower surface of the high-performance filter 12 are brought into airtight contact. It is possible to maintain airtightness between the filter and the outer peripheral portion of the lower surface of the high-performance filter 12, thereby preventing the occurrence of bypass leaks.
Further, the filter presser 26 is rotated downward about the rotating part 28 and pressed against the high-performance filter 12, and the airtight retaining member 21 is pressed, and the support surface 20 and the lower surface outer circumference of the high-performance filter 12 are pressed. Since airtightness is maintained between the two, bypass leaks can be prevented regardless of the skill level of the operator.
In addition, by rotating the filter holder 26 that presses the high-performance filter 12 upward about the rotating part 28, the filter holder 26 can be separated from the high-performance filter 12, thereby saving work space. The high performance filter 12 can be easily replaced even in a limited space.

In addition, on the rotary part 28 side of the filter holder 26, there is a possibility that the pressing force by the filter holder 26 is insufficient, but by tightening and fixing the other edge of the filter holder 26 to the casing 11 with the tightening tool 30, the pressure can be increased. Since a pressing member 40 is provided that presses one edge of the high-performance filter 12 toward the airtight maintenance member 21, the supporting surface 20 and the outer circumference of the lower surface of the high-performance filter 12 are reliably connected even on the rotating portion 28 side. It is possible to maintain airtightness between the

Furthermore, since the tightening tool 30 is provided on the front of the casing 11 and is covered by a front decorative cover 15 that is removably attached to the front of the casing 11, the work of attaching and removing the high-performance filter 12 can be carried out from the casing. This can be easily done from the front side of 11, and the tightening tool 30 can be covered and hidden by the front decorative cover 15, resulting in an excellent design.
In addition, the lower parts of the front decorative cover 15 and the side decorative cover 17 protrude downward from the lower surface of the casing 11, so when the air cleaner 10 is installed on an installation surface such as a floor, stand, shelf, etc., the lower surface of the casing is away from the surface. Since the inflow port 11a is provided on the lower surface of the casing, the air taken in from the intake ports 15a and 17a can be reliably flowed into the inside of the casing 11 through the inflow port 11a.
Moreover, since the pre-filter 18 is provided on the lower surface of the casing 11 facing the inlet 11a, relatively large dust particles can be removed by the pre-filter 18. Furthermore, since the pre-filter 18 is removably attached to the casing 11, the pre-filter 18 can be easily replaced.

Further, the air purifier 10 is installed on the luggage shelf 81 with the front decorative cover 15 of the air cleaner 10 facing the loading/unloading port side of the luggage shelf 81, and the upper surface of the air cleaner 10 installed on the luggage shelf 81 is Since there is a gap g between the air purifier 10 and the ceiling surface of the baggage shelf 81 that allows air to flow, It can be made to flow into the inside of the casing 11 from the inlet 11a. Then, a high-performance filter 12 inserted inside the casing 11 removes dust contained in the air and blows it out as clean air, but the clean air passes through the gap g and spreads inside the train. The air inside the train can be reliably purified.
Further, the shape of the intersection k1 between the upper edge and the rear edge of the side decorative cover 17, which protrudes rearward from the back surface of the casing 11, is the same as the intersection k2 between the ceiling surface and the back side of the luggage rack 81. Since the shapes are substantially the same, the air cleaner 10 can be placed close to the luggage rack 81, and the intersection k1 of the air cleaner 10 can be placed close to the intersection k2 of the luggage shelf. Therefore, the air cleaner 10 can be easily accommodated in the luggage rack 81.

In addition, in this embodiment, the case where the air cleaner 10 according to the present invention is installed on the luggage rack 81 of the train 80 has been explained as an example, but the air cleaner 10 can be installed at a place other than the luggage rack 81 of the train 80. You may.

Next, an experimental example of an installation structure for an air cleaner according to the present invention will be described.
[Train airflow visualization experiment]
(experimental method)
(1) Install the air cleaner 10 on the luggage rack 81 in a layout as shown in FIG. 9 (stopped state).
(2) Operate the train's air conditioning.
(3) Scan the airflow from the air conditioning outlet using a clean viewer (a portable airflow visualization device that uses a mist generation mechanism).
(4) Use a clean viewer to investigate the airflow to the air conditioning circulation section.
(5) Operate the air cleaner 10 and check the diffusion situation indoors.

(Experimental result)
(1) A flow of approximately 0.86 m/s downward from the air conditioning outlet of the train's air conditioner was confirmed.
The serious airflow remained almost unchanged even when Air Purifier 10 was operated.
(2) A suction point, which is presumed to be a circulation section, was confirmed on the back side of the light cover of the luggage rack.
(3) After colliding with the ceiling of the luggage rack, the clean airflow from the air cleaner 10 flows along the luggage shelf, and spreads into the vehicle on the air conditioning airflow from the air conditioning outlet.

(Experimental consideration)
(1) From the experimental results (1) and (2), it is estimated that the airflow form inside the train is as shown in FIG.
(2) From the experimental results (1) and (3), it is considered that the discomfort caused to passengers by the wind from the air cleaner 10, which had been a concern, is minor.

[Air conditioner processing air volume survey]
(experimental method)
(1) Operate the train's air conditioning.
(2) Measure the wind speed directly below the air conditioning outlet. The air conditioning outlet was formed in the shape of a slit with a slit width of 35 mm and extending in the longitudinal direction of the train, and the measurement pitch was 1000 mm in the longitudinal direction of the slit.
(3) Calculate the average value of each measurement point on the right and left rows of the train, and calculate the air volume for each row by multiplying by the blowout area.
(4) Add the air volumes of the right and left rows of the train to calculate the vehicle air conditioning processing air volume.

(Experimental result)
Table 1 shows the values of the average blowing wind speed and air volume calculated from the measurement results of the train shown in FIG. The air conditioning processing air volume obtained as a result of the measurement was 54.8 m ³ /min, which was smaller than the outside air intake air volume of 80 m ³ /min, which had been obtained in advance. (Because the air volume changes depending on the set temperature)

(Experimental consideration)
Since the total amount of outside air introduced and the amount of air circulated inside the vehicle is the amount of air processed by the air conditioner, we estimate the amount of air processed by the air conditioner as follows from the results of this experiment.
(1) 80 m ³ /min is not the amount of outside air introduced, but the amount of air processed by the air conditioner.
(2) Since the measured value is less than 80 m ³ /min, 80 m ³ /min is the maximum processing air volume of the air conditioner.
(3) The processing air volume at the time of this measurement was adjusted using auto mode.

[Cleanliness confirmation experiment]
(experimental method)
(1) As shown in Figure 9, particle counters P are installed at three locations on the train.
(2) Close the train cabin door.
(3) Start/stop the train's air conditioning.
(4) Measure the dust concentration every minute and confirm that the dust concentration is stable.
(5) Operate the air cleaner 10.
(6) Measure the dust concentration every minute, and continue measuring until the dust concentration stabilizes.
(7) Average the measurement results from the three locations and summarize the number of particles of 0.3 μm or larger.

(Experimental result)
Figure 10 shows the change in dust concentration on trains. Table 2 also shows the rate of decrease from the initial dust concentration. As a result of the measurement, the following two items were obtained.
(1) The dust concentration reduction rate by the air cleaner 10 during air conditioning operation was 77.6%.
(2) The dust concentration reduction rate by the air cleaner 10 when the air conditioning was stopped was approximately 90%.

(Experimental consideration)
(1) From the experimental results (1), the dust reduction rate during air conditioning operation is 76% when the air conditioning is stopped.
(2) From the experimental results (2), the air conditioner was stopped and the dust concentration reduction rate with the air purifier alone was approximately 90%.
The number of circulations calculated from the train volume of 95 m ³ predicted from FIG. 9 and the air volume of the air cleaner 10 of 18 m ³ /min is approximately 11 times/h, which is considered to be a relatively good result.

10 Air purifier 11 Casing 11a Inlet 12 High performance filter 13 Fan 15 Front decorative cover 15a Inlet 17 Side decorative cover 17a Inlet 18 Pre-filter 20 Support surface 21 Airtight maintenance member 25 Filter fixing part 26 Filter holder 28 Rotating part 30 Fastener 40 Pressing member 80 Train 81 Luggage shelf k1, k2 Intersection g Gap

Claims (3)

An air purifier comprising a casing and a HEPA filter inserted inside the casing,
The casing has a support surface that supports a lower peripheral portion of the HEPA filter ,
The HEPA filter inserted into the casing is fixed to the casing by a filter fixing part,
The filter fixing part is
an airtight maintenance member that is provided on the outer circumferential portion of the lower surface of the HEPA filter and/or the supporting surface and maintains airtightness between the supporting surface and the outer circumferential portion of the lower surface of the HEPA filter ;
a filter holder whose one edge is attached to the upper part of the casing via a rotating part so as to be rotatable up and down about the rotating part;
a tightening tool that tightens and fixes the other edge of the filter holder to the casing while the filter holder is pressed against the HEPA filter ,
By pressing the filter holder against the HEPA filter with the tightening tool and pressing the airtight holding member, the support surface and the outer circumference of the lower surface of the HEPA filter are brought into airtight contact ;
The fastening tool is provided on the front side of the casing and is covered by a front decorative cover detachably attached to the front side of the casing,
Side decorative covers are provided on both sides of the casing,
Lower portions of the front decorative cover and the side decorative cover protrude downward from the lower surface of the casing,
An intake port for taking in outside air is provided at the lower part of the front decorative cover and the side decorative cover,
An air cleaner characterized in that the lower surface of the casing is provided with an inflow port through which air taken in from the intake port flows into the inside of the casing. The HEPA filter is attached to one edge of the HEPA filter on the rotating part side and/or one edge of the filter holder by tightening and fixing the other edge of the filter holder to the casing using the tightening tool . The air cleaner according to claim 1, further comprising a pressing member that presses one edge of the airtight member toward the airtight maintaining member. An air cleaner installation structure in which the air cleaner according to claim 1 or 2 is installed on a luggage rack of a train,
The air cleaner is installed on the luggage shelf with the front decorative cover of the air cleaner facing the loading/unloading opening side of the luggage shelf,
An installation structure for an air cleaner, characterized in that a gap is provided between an upper surface of the air cleaner installed on the luggage shelf and a ceiling surface of the luggage shelf to allow air to circulate.

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