JP3062693B1 - Ultra-thin air purifying unit - Google Patents

Abstract

To provide an air purifying unit which can be adapted to various use forms and can form a highly flexible clean space without being restricted by an installation place or the like. SOLUTION: An air outlet 22 is opened in one flat surface of a casing 21 having a flat box-like shape and the inside of which is a cavity 20, and a main filter 2 is provided in the casing behind the casing.
The suction unit 36 is opened on one of the flat surfaces of the filter unit 2 provided with the filter unit 4 and the casing 3 having a flat box-like shape and the inside of which is a cavity 30 as described above. And a fan unit 3 provided with a blower (33) inside a casing behind the filter unit 2. Opening communication ports 26 and 38 for connecting the insides of the casings to each other are opened at the joint end face of the filter unit 2 and the fan unit 3. Then, they were connected by detachable connecting means 4 to be integrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultra-thin air purifying unit adaptable to various use forms.

[0002]

2. Description of the Related Art Conventionally, air purifying apparatuses are manufactured and supplied in various types of equipment in which the direction and route of an air flow are specified according to the field of use and the purpose of use.

[0003] For example, a package-type clean unit that is installed in a room, purifies indoor air, and circulates the room.
A fan filter unit that is used to supply clean air to a limited space where contamination control is performed, such as a clean room or a clean booth, or a clean unit that supplies clean air to a table that performs a specific operation. Bench etc. are typical,
In all of these, the air path from the air intake to the air discharge was fixed and could not be shared.

Further, at medical sites in contact with patients carrying the harmful bacteria, and experiments and operations for handling the harmful bacteria, contaminated air is sucked and filtered through a HEPA filter or the like as opposed to supplying clean air. It is necessary to adopt a configuration in which the air is purified and released to the atmosphere, and sharing is difficult except for a very small number of cases that can be handled by using the clean unit in the reverse direction.

Further, in order to obtain the required air cleanliness and air flow required for the entire room, the size of the apparatus is inevitably increased, and in the case of a packaged clean unit or the like, it is almost always placed near a wall due to the installation space. It is. For this reason, if it is sufficient to secure air cleanliness only in a part of the room, a clean booth or a clean bench will be used, but there are restrictions on the degree of freedom of the clean space that can be formed. .

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned points of the conventional air purifying apparatus, the present invention can be adapted to various use modes conventionally supported by different apparatuses and is subject to restrictions on installation locations and the like. The purpose of the present invention is to obtain an air purifying unit capable of forming a clean space with a very high degree of freedom, which is not available in conventional apparatuses.

[0007]

In order to solve the above-mentioned object, an air purifying unit according to the present invention is provided with an air outlet in one flat surface of a casing having a flat panel shape and an inside of which is a cavity. A filter unit having an opening and a main filter provided at the outlet, and a suction opening formed on one of the flat surfaces of a casing having a flat panel shape and a hollow interior similarly to the casing, and A fan unit in which a pre-filter is provided at the mouth and a blower having an in-hub structure in which a motor enters a central portion of a fan and a rotation axis thereof is provided in a casing behind the fan so that a rotation axis thereof is aligned with a thickness direction of the casing, The filter unit and the fan unit each have a communication port for connecting the inside of the casing to one end face in a state where the end faces are joined to each other. In addition to the opening, the filter unit and the fan unit are connected by detachable connecting means in the joined state to be integrated, and the communication port and the connecting means are arranged or formed 180 degrees rotationally symmetric at the joint end face. It was taken.

The main filter is arranged at the center of the filter unit and the blower is arranged at the center of the fan unit, and the periphery of each casing is formed in a panel shape thinner than the thickness of the main filter and the blower. On the other hand, it is preferable to cover the center of the front surface of each casing with a front cover that protrudes forward, and to open an outlet or a suction port in the front cover.

Further, the filter unit and the fan unit are formed in a flat panel shape similarly to the peripheral portions of the respective casings, and the interior is a cavity, and a communication port is opened at the two joint end surfaces. It may be connected by detachable connecting means via an extension casing to be integrated. Also,
In each of the above cases, the air blowing direction of the blower may be reversed, and the air taken into the filter unit from the outlet through the main filter may be sent out from the inlet of the fan unit to the outside.

[0010]

1 to 3 show an embodiment of the ultra-thin air purifying unit of the present invention. In the figure, an air purifying unit 1 includes a filter unit 2 and a fan unit 3 as a set, and connects them to a connecting means 4 (shown in FIG. 3).
And are integrated with each other.

The filter unit 2 has a flat box shape or a panel shape, and is formed on one of the flat surfaces 2 of a casing 21 having a cavity 20 (filter chamber) inside.
1a is provided with a main filter 22 (a HEPA filter or a filter having a filtering capacity equivalent thereto),
An outlet 24 is opened at the center of the front surface, and is covered with a front cover 23 that projects forward. The outlet 24 is provided with a wire mesh, a diffusion punching plate, or the like, and a sheet-like adsorption filter 25 (activated carbon filter) is provided between the air outlet 24 and the main filter 22 behind. The lower end surface 21 b of the casing 21 is a joint surface with the fan unit 3 and opens a communication port 26. Reference numeral 27 denotes an operation panel provided with switches for operating / stopping a turbo fan 33, which will be described later, and switching between high and low, and an air indicator.

The fan unit 3 has a flat box-like or panel-like shape like the casing 21 of the above-mentioned filter unit 2 and has one cavity 31a (a fan chamber) having a cavity 30 (fan chamber) inside. A suction port 32 is opened in the front panel 29), and a turbo fan 33 (blower) is provided inside the casing 31 behind the suction port 32.
Is provided.

The turbo fan 33 has an in-hub structure in which a hub portion at the center of the fan is recessed, and a motor 34 is inserted into the recessed hub 33a.
The thickness of the fan unit 3 is reduced to 10 cm or less by arranging the fan unit 3 so as to match the thickness direction.

The front surface of the suction port 32 is covered with a front cover 35 which projects forward and has a suction port 36 opened at the center.
A wire net or diffusion punching or the like is stretched over the suction port 36, and a pre-filter 37 made of a saran net or a non-woven fabric is stretched behind the wire mesh or diffusion punching. The suction port 36 is larger than the suction port 32 and is expanded to the same width as the width of the suction port 24, so that the area of the pre-filter 37 is increased and a sufficient air flow is secured.

The upper end surface 31b of the casing 31
Is a joint surface with the above-described filter unit 21, which coincides with the communication port 26 in the joined state, and communicates the internal cavities 20, 30 of the casings 21, 31, ie, the filter chamber and the fan chamber, with each other. The communication ports 38, 38 are opened.

The air cleaning unit 1 constructed as described above
Is controlled by a turbo fan 33 rotated by a motor 34.
Air outside the device is supplied from a suction port 36 to a pre-filter 37,
The air is sucked through the inner suction port 32 and is introduced into the cavity 30 of the fan unit 3. Then, it is pressure-fed into the cavity 20 of the filter unit 2 through the communication ports 38 and 26, and is filtered by the main filter 22 and the adsorption filter 25.
The air is blown out of the apparatus from the air outlet 24 as clean air.

The air purifying unit 1 has the casings 21 and 31 formed by extending the front covers 23 and 35 of the filter unit 2 and the fan unit 3 forward as shown in FIG. 2 or FIG. The thickness of the peripheral part is the main filter 24, turbo fan 33, motor 34
It is formed thinner than the thickness required for installation, which reduces the feeling of pressure on the installation space. In addition, when connecting to the clean booth wall panel, ceiling panel, partition, etc., the existing C channel etc. It is possible to use a connecting means similar to the connecting means described above.

In the illustrated air cleaning unit 1,
Front cover 2 for height 1485mm and width 890mm
The thickness (depth) including 3,35 is 90mm (10% of the width)
The thickness of only the casings 21 and 31 excluding the front covers 23 and 35 can be made only 60 mm, and the thickness of the existing partition is about 30 to 60 mm. It can be called thickness.

The main filter 24 and the pre-filter 37 are provided on the deviated flat surfaces 21a and 31a, while having such a thin shape, and a sufficient filtration area is secured. The processing air volume is about 0.35m / s.
8.6 m ³ / min at a high wind speed of ec, and 4.2 m ³ / mi at a low wind speed of about 0.17 m / sec.
n is achieved.

As shown in FIG. 3, the connecting means 4 for connecting the filter unit 2 and the fan unit 3 of the air purifying unit 1 are connected to the joint surfaces 21b and 31b at the center in the width direction and on both side portions of each unit. It is preferable to insert a bolt 42 into the provided screw hole 41 and fix it with a nut (not shown). As shown in the figure, by removing the front cover 35 on the side of the fan unit 3 and the front panel 39 inside the same, the filter unit is removed. 2 and fan unit 3
And can be easily separated. In addition, each said joining surface 21b, 31
A fitting structure may be formed in b.

The communication ports 26, 38 and the connecting means 4 (41, 42) are arranged symmetrically in the front-back and left-right directions on the joint surfaces (21b, 31b), that is, are arranged symmetrically by 180 degrees. , The filter unit 2 and the fan unit 3 can be connected in a reverse direction,
The direction of airflow suction / blowout can be changed to the opposite direction.
Thereby, two basic air circulation type 1A shown in FIG. 4 (a) for blowing out the sucked air to the same side, and an external air introduction type 1B shown in FIG. 4 (b) for blowing out the sucked air to the opposite side. A suitable airflow form can be selected. Also, as shown in FIGS. 4 (c) and 4 (d), by inverting the above two forms, the form of airflow used for a biohazard application to be described later can be selected, as in 1A 'and 1B'.

The air purifying unit 1 of the present invention can be adapted to various use modes by a configuration in which the above two airflow modes can be selected and a configuration in the form of a thin panel.
Each embodiment will be described with reference to the drawings.

FIG. 5 (a) shows an air purifying unit 1 as an internal air circulation type 1A on a wall surface 51 of a room 50 with an L-angle member 5A.
The air in the room 50 is sucked into the fan unit 3, purified by the filter unit 2, and circulated through the room 50. FIG.
(B) shows an air purifying unit 1A of the same type,
5 shows a case where the camera is attached to the ceiling 54 by using.

On the other hand, FIG. 5C shows that the air purifying unit 1 is incorporated into a ceiling partition 56 of a room 55 as an outside air introduction type 1B, and an upper space 5 communicating with the outside of the room above the ceiling partition 56.
7 shows a case where outside air is sucked in from 7, cleaned and introduced into the room 55.

FIG. 6 shows that an air purifying unit 1B of an outside air introduction type is incorporated into a ceiling portion 62 of a clean booth 61 by using a mounting frame member 63 to purify external air and blow out the air into the clean booth 61. A clean positive pressure space is formed inside the clean booth 61. In particular, since the air cleaning unit 1 of the present invention is formed to be extremely thin,
There is almost no overhang to the ceiling side, the overall height of the booth can be kept low, and the weight per unit area is reduced, so that the entire booth can be reduced in weight and the load on the structural elements can be reduced. The clean booth 61 can be incorporated into a side surface other than the ceiling surface. In this case, since there is almost no overhang to the side, the installation area of the booth can be reduced.

FIGS. 7 (a) and 7 (b) show two outside air introduction type air purifying units 1B arranged side by side and incorporated into a part of a partition 71 such as a clean room to purify the air outside 72 of the partition 71. This shows a case in which the device is introduced into the clean room 70. The two air cleaning units 1B, the wall surface 73, and the partition 71 are connected to each other by C channels 74, 75, and 76. The upper side of the partition 71 may be open, but when stricter contamination control is to be performed, an extension panel 81 may be provided as shown in FIG. it can.

As shown in FIG. 8 (b), by providing an extension casing 82 between the fan unit 3 and the filter unit 2, the clean air outlet 24 of the air purifying unit 1B is set at a high position. be able to. The extension casing 82 has a flat panel shape like the casings 21 and 31 of the filter unit 2 and the fan unit 3 described above, and has an internal cavity. , A communication port is provided.

Further, as shown in FIG. 9, the air purifying unit 1 of the present invention can be used as a self-standing partition by attaching a self-standing stand 91 (with or without casters) to the lower end. In the illustrated example, only two air cleaning units 1B of the outside air introduction type are arranged side by side, but the upper and lower ends and the like may be connected to each other.

As described above, the air cleaning unit 1 of the present invention
Has a thin and flat panel shape, and thus has a function as a partition itself, and a clean space can be created on the outlet side of the air purifying unit 1 simply by installing the open space.

Hereinafter, a specific mode of use as a self-contained partition will be described taking a case of a medical institution such as a hospital as an example.

FIG. 10 shows an example of installation in a waiting room of a hospital or the like, in which two air purifying units 1B with a freestanding stand are arranged side by side on one side of a waiting room 102 in which a chaise lounge 101 is arranged in an L shape. Thus, the waiting room 102 is partitioned from the adjacent space 103 such as a passage or a hall, and the air in the adjacent space 103 is purified and blown out to the waiting room 102 side. In this example, the air purifying unit 1B has a function as an air purifier that supplies clean air to the waiting room 102 and also functions as a partition between the waiting room 102 and the adjacent space 103 to restrict the flow of air.
A clean space (102) is created on the outlet side.

FIGS. 11A to 11C show examples of installation in a consultation room. (A) arrange | positions one air purifying unit 1B with a freestanding stand behind doctor D,
By sending clean air from the patient to the patient P, secondary infection from the patient P suffering from an air-borne disease or the like to the doctor D can be prevented, and by sending clean air to the patient P,
It also has the effect of making breathing easier.

FIG. 11 (b) is basically the same, but by installing another air purifying unit 1B with the suction port 36 behind the patient P, contaminated air passing through the patient P is removed. It can be sucked through the suction port 36, sterilized by a main filter (not shown), and sent out. FIG.
(C) arranges one air purifying unit 1B on the side of the doctor D and the patient P, and cuts off by a clean air flow crossing between the doctor D and the patient P to prevent the secondary infection to the doctor D. Is what you do.

FIG. 12 also shows an example of installation in a consultation room, in which a passage 121, a door 122 and a partition 1 are shown.
2 between a plurality of examination rooms 124, 124 partitioned by 23
By arranging a set of air purification units 1B side by side as a set instead of a partition, each examination room 1
24, and a cross-flow of clean air in each consultation room 124 to prevent secondary infection from the patient P to the doctor D and to remove contaminated air from the opposite air purifier. It is inhaled and collected by the unit 1B and sterilized.

FIG. 13 (a) shows an example of installation in a hospital room, in which two air purifying units 1B, 1B with a self-supporting stand are placed back to back at the position of a curtain 132 partitioning the middle of the beds 131, 131. And each patient P
Supply clean air to FIG.
(B) is a sterile treatment room partitioned by a glass window 133, FIG.
3 (c) is an intensive care unit (I) partitioned by a curtain 134.
CU / CCU).

As described above, the air purifying unit 1 of the present invention has an advantage that various clean spaces can be set only by installing the air purifying unit in an open space, and that the layout and the air flow direction can be easily changed even after the installation. Yes.

FIG. 14 shows an embodiment in which the air cleaning unit 1 of the present invention is used as a clean bench 141 (cleaning work table). As shown in the figure, a table 142 is provided in front of the air outlet 24 of the air purifying unit 1B with a freestanding stand.
In addition, a clean working space 144 is created above the table 142 by surrounding both sides and the upper side of the air outlet 24 with the hood 143. It is to be noted that an inside air circulation type air cleaning unit 1A can be used, but since the feet of the worker are exposed to the suction airflow and the operation noise of the device is mainly emitted to the outside from the suction port 36, the quietness is reduced. However, the outside air introduction type air cleaning unit 1B is preferable. Instead of using the hood 143 and the dedicated table 142, an air cleaning unit 1B with a self-supporting stand may be installed behind a normal work table to form a simple clean work table.

In each of the above embodiments, FIGS. 4 (a) and 4 (b)
When the air purifying units 1A and 1B shown in (1) are installed vertically for wall surfaces and partitioning, the filter unit 2 is arranged on the upper side, and the fan unit 3 is arranged on the lower side. As described in FIGS. 4 (c) and 4 (d), the air purifying units 1A and 1B are turned upside down as shown in FIGS. 4 (c) and 4 (d). , 1B '. These air cleaning units 1A 'and 1B' are suitable for use in biohazard applications that require a configuration for inhaling, sterilizing, purifying and releasing contaminated air in experiments and operations that deal with harmful bacteria and chemicals.

FIG. 15 shows a simple hazard room 151 as an example. The hazard room 151
An air purifying unit 1B is disposed on one side and an air purifying unit 1B 'for biohazard is disposed on the other side. The outside air is purified by the air purifying unit 1B and supplied to the internal space 150, while the air purifying unit 1B' is contaminated. and clean air is configured to be discharged to the outside, the internal space 150 a suction airflow volume of the air cleaning unit 1B' side Q ₂ is set larger than the air volume Q ₁ blow air cleaning unit 1B and between clean shade pressure This makes it possible to handle harmful bacteria and harmful substances.

FIG. 16 shows a suction port 36 of a biohazard air cleaning unit 1B 'to which a self-supporting stand 91 is added.
A table 162 is installed in front of the hood 163, and both sides and a ceiling surface of a work space 164 formed above the table 162 are surrounded by a hood 163, thereby forming a simplified draft chamber 161.

In the simplified draft chamber 161, the inside of the working space 164 is maintained at a negative pressure,
The contaminated air generated at 64 is sucked from the suction port 36, purified by the main filter 22, and released to the outside from the air outlet 24, so that it can be used for preparation of harmful drugs, work for handling harmful substances and harmful bacteria, and experiments. it can.

Further, by reversing the direction of air flow of the fan for each of the four types of air cleaning units 1A, 1B, 1A 'and 1B' shown in FIGS.
As shown in (a) to (d), the filter unit 202
4 types of air cleaning units 201A, 201B, 201A that suck in from the side and blow out from the fan unit 203 side
, 201B '.

These air cleaning units 201A, 201
1B, 201A 'and 201B', the filter unit 202 uses exactly the same as the filter unit 2 shown in FIG. 4, but the airflow direction is reversed, so the opening in front of the main filter 222 is connected to the suction port 224. Become. Further, the fan unit 203 has the fan 233 and the motor 234 of the fan unit 3 shown in FIG.
Are partitioned by an internal partition 239 having an opening, and a pressurizing section 240 is formed.

With the above configuration, the air that has been cleaned from the suction port 224 through the main filter 222 (and an activated carbon filter (not shown)) and introduced into the cavity 220 is passed through the communication ports 226 and 238 and the cavity of the fan unit 203. 23
0, and can be blown out from the outlet 236 through the inlet 232, the turbo fan 233, and the pressurizing section 240, and these can be air-purified units 1A ', 1B' described above.
It is suitable for biohazard as well.

In each of the above embodiments, the air cleaning units 1A, 1B, 1B in which the filter units 2, 202 and the fan units 3, 203 are detachably connected.
, 201A, 201B, 201A ', 201B', but the filter units 2, 202 and the fan units 3, 203 may be permanently fixed or their casings 21, 31 may be integrally formed. it can. In this case, the inside air circulation type 1A, 201A and the outside air introduction type 1B, 201B cannot be used together.
In other words, similar effects can be expected in that many parts can be shared and that the ultra-thin shape can be used as a partition member for a space such as a partition.

[0046]

The ultra-thin air purifying unit of the present invention is configured as described above, and has the following effects.

By providing an ultra-thin flat panel shape and providing an air outlet on the flat surface, the installation space can be extremely small, and it can be easily installed on the indoor wall surface or ceiling surface. It can be applied to various types of usage, such as incorporating it into a booth wall panel or ceiling panel, using it as a free-standing partition, or even using it as a biohazard.

In particular, when used as a partition, it itself has a function as a partition for partitioning the clean space, and it is possible to create an open clean space on the air blowing side simply by installing it in the space. This makes it possible to form a highly flexible clean space that is not present in conventional air purifiers without being restricted by the installation location or the like.

Further, despite the ultra-thin configuration, the suction port and the air outlet are provided on a deviated plane, so that a sufficient filtration area can be secured in the main filter and the pre-filter, so that the blow-out air volume and the filtration capacity are excellent. ing.

Since the filter unit and the fan unit are connected by a detachable connecting means, if they are separately packed, the size of the packing during transportation can be reduced.

Further, since the communication port and the connecting means between the filter unit and the fan unit are arranged or formed in a 180 ° rotationally symmetrical manner at the joint end face, the mounting direction of the fan unit and the filter unit can be simply changed by changing the mounting direction. One model can be used for both the inside air circulation type that blows out on the same side as the suction side and the outside air introduction type that blows out on the side opposite to the suction side, simplifying the manufacturing process and reducing manufacturing costs by using common parts. Needless to say, the airflow direction can be selected and changed after installation.

Further, by providing an extension casing between the filter unit and the fan unit, it is possible to adjust the positional relationship between the suction port and the air outlet and to adjust the height of the entire partition. it can.

The main filter is arranged at the center of the filter unit and the blower is arranged at the center of the fan unit, and the periphery of each casing is formed in a panel shape thinner than the thickness of the main filter and the blower. The center of the front of each casing is covered with a front cover that protrudes forward, and the outlet and the suction port are opened in the front cover. be able to.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an air cleaning unit according to an embodiment of the present invention.

FIG. 2 is a front central longitudinal sectional view showing the air cleaning unit of the embodiment of the present invention.

FIG. 3 is a perspective view showing an exploded state of the air cleaning unit according to the embodiment of the present invention.

FIGS. 4A to 4D are schematic front central longitudinal sectional views showing variations of selectable airflow directions in the air cleaning unit according to the embodiment of the present invention.

FIGS. 5A to 5C are schematic side views showing various uses of the air cleaning unit according to the embodiment of the present invention.

FIG. 6 is a side view showing a usage mode in which the air cleaning unit according to the embodiment of the present invention is incorporated in a ceiling portion of a clean booth.

FIG. 7A is a plan view showing a usage mode in which the air cleaning unit of the embodiment of the present invention is incorporated in a part of a partition, and FIG. 7B is a front view of the same.

FIGS. 8 (a) and (b) are side views showing a usage form in which an extension panel and an extension casing are added to the air cleaning unit of the embodiment of the present invention and incorporated into a part of a partition.

FIG. 9 is a perspective view showing a usage form in which two air cleaning units according to the embodiment of the present invention are arranged to form a self-supporting partition.

FIG. 10 is a plan view showing an installation example in a case where the air cleaning unit according to the embodiment of the present invention is used as a self-supporting partition.

FIGS. 11A to 11C are plan views showing another installation example when the air cleaning unit according to the embodiment of the present invention is used as a self-supporting partition.

FIG. 12 is a plan view showing still another installation example in the case where the air cleaning unit according to the embodiment of the present invention is used as a self-supporting partition.

13 (a) to 13 (c) are plan views showing other installation examples when the air cleaning unit according to the embodiment of the present invention is used as a self-supporting partition.

FIG. 14 is a side view showing a use mode in which the air cleaning unit according to the embodiment of the present invention is used as a clean bench.

FIG. 15 is a side view showing a usage mode in which the air cleaning unit according to the embodiment of the present invention is used in a simple hazard room.

FIG. 16 is a side view showing a usage mode in which the air cleaning unit according to the embodiment of the present invention is used as a simple draft chamber.

FIGS. 17 (a) to (d) are schematic front central longitudinal sectional views showing variations of selectable air flow directions in an air cleaning unit according to another embodiment of the present invention.

[Explanation of symbols]

1, 1A, 1B, 1A ', 1B', 201A, 201
B, 201A ', 201B' Air cleaning unit 2, 202 Fan unit 3, 203 Filter unit 4 Connecting means 20, 30, 220, 230 Cavity 21, 31 Casing 22, Main filter 23, 35 Front cover 24, 236 Air outlet 26 , 38 Communication port 32, 36, 224, 232 Suction port 33, 233 Turbo fan 34, 234 Motor 37 Pre-filter

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Suzuki 2-10-20 Aoyagi, Soka-shi, Saitama Japan Inside Airtech Corporation (72) Inventor Takeshi Uetani 2-10-20 Aoyagi, Soka-shi, Saitama Japan Airtech (56) References JP-A-7-42980 (JP, A) JP-A-4-222615 (JP, A) JP-A-3-8406 (JP, A) JP-A-5-92116 (JP, A) A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B01D 46/00

Claims (4)

(57) [Claims] 1. A filter unit comprising a flat panel-shaped casing having a hollow inside with an air outlet opening on one of the flat surfaces and a main filter provided in the air outlet. A suction port is opened in one of the flat surfaces of a casing having a flat panel shape and a hollow inside, and a pre-filter is provided in the suction port. And a fan unit having an in-hub structure in which a motor is inserted into the fan unit, the rotation axis of which is aligned with the thickness direction of the casing, and the filter unit and the fan unit are provided at one end face, and at each end face. In a state where the filter unit and the fan unit are joined to each other, a communication port for communicating the insides of the casings with each other is opened. An ultra-thin air cleaning unit, wherein the knits are connected by detachable connecting means to form an integral unit, and the communication port and the connecting means are arranged or formed 180 degrees rotationally symmetric at the joint end face. 2. The main filter is arranged at the center of the filter unit, and the blower is arranged at the center of the fan unit, and the periphery of each casing is formed in a panel shape thinner than the thickness of the main filter and the blower. 2. The ultra-thin air cleaning unit according to claim 1, wherein the front center of each casing is covered with a front cover projecting forward, and an outlet and a suction port are opened in the front cover. 3. A filter unit and a fan unit, each of which has a flat panel shape similarly to the peripheral portion of each casing, has an internal cavity, and has a communication port opened at two joint end surfaces thereof. 3. The ultra-thin air purifying unit according to claim 2, wherein the unit is integrally connected by detachable connecting means via an extension casing. 4. The air blower according to claim 1, wherein the air blow direction of the blower is reversed, and the air sucked into the filter unit from the outlet through the main filter is sent out from the inlet of the fan unit to the outside. Ultra-thin air purification unit.