JP5423115B2 - Air supply filter device - Google Patents

Description

  The present invention relates to an air supply filter device that cleans air when supplying outdoor air into a room by a ventilation device.

  Conventionally, this type of air supply filter device has an air supply system in which outside air is sucked into a ventilator through a duct from an outdoor opening end that opens to the outside, and air is supplied into the room from an indoor outlet facing the room. In addition, a ventilation system is known in which the ventilation device is installed in a space behind the ceiling of a building (see, for example, Patent Document 1).

  The filter device in the ventilation system described in Patent Document 1, a part of the air supply path of the outside air between the outdoor opening end and the ventilation device is configured in the box structure body and provided at a position where the indoor hand can reach, An air filter that holds the filter frame and filters the supply air is detachably provided so as to cross the supply path of the box structure.

  The box structure that forms the outer shell of the filter device includes a connection flange that connects a duct that leads to the outdoor opening end, and a connection flange that connects a duct that leads to the suction port of the ventilator, arranged side by side in a symmetrical position on the top. The connected duct leads to the back of the ceiling and communicates with the outdoor open end and the air inlet of the ventilator.

JP 2007-187408 A

  In such a conventional air supply filter device, at the time of cleaning, the air filter is removed from the box structure and cleaned to remove the adhering dust. There is a problem that it is necessary to prepare a tray or the like to receive dirt or falling dust.

  The present invention solves such a conventional problem, and an object of the present invention is to provide an air supply filter device that can sufficiently clean an air filter without polluting the room when the filter device is cleaned.

  In order to achieve the above object, the air supply filter device of the present invention has a filter disposed so as to partition the internal space of the box-shaped outer shell, and forms a suction port on one side of the space partitioned by the filter. A filter unit having a discharge port formed on the other partitioned space side, a suction side connection part for connecting and connecting an outdoor duct communicating with the outside, and a ventilator installed on the back of the ceiling for supplying air into the room A discharge unit connecting the indoor duct connected to the air intake port, and a filter unit fixture fixed to the indoor side wall surface, the filter unit being connected to the filter unit fixture and the suction port And the suction side connection portion and the discharge port and the discharge side connection port are respectively connected to be detachable.

  Further, the other means may include a filter unit fixture comprising a back surface portion provided with the suction side connection portion in contact with the indoor side wall surface and a top surface portion provided with the discharge side connection portion. It connects to the indoor side edge part of the outdoor side duct inserted and attached to the part, and is attached.

  Another means is to form a fitting groove for the filter on the outer wall surface of the filter unit, and to selectively attach different types of filters.

  In another means, the filter is disposed horizontally.

  Another means is that the filters are arranged vertically.

  Another means is that the filter is disposed so as to be inclined with respect to the air supply airflow.

  Another means is to provide an insect net on the upstream side of the filter.

  In another means, the outer shell of the filter unit is made of foamed polystyrene.

  Another means is that the outer periphery of the filter unit is blow-molded with a resin having an air layer inside.

  According to another aspect of the invention, the suction side connection portion is connected to the outdoor duct having a low outdoor inclination, and the lower end portion of the inner peripheral surface thereof is positioned below the lower surface of the inner wall of the outer shell. It is a thing.

  According to another means, a protrusion for fitting and holding the outer shell of the filter unit is provided at the lower part of the filter unit fixture.

  According to another means, a protrusion for fitting and holding the outer shell of the filter unit is provided on the upper part of the filter unit fixture.

  Another means is to provide opposing side plates on both side surfaces of the filter unit fixture, and to provide fitting portions for fitting and holding the outline of the filter unit to the opposing side plates.

  Further, another means is provided with a thumb screw that is screwed into the filter unit fixture while pressing the outline of the filter unit at the front portion of the filter unit fixture.

  In addition, the other means is provided with a blower unit in which a blower is provided in the filter unit fixture instead of the ventilation device, and the discharge port of the filter unit communicates with the intake port of the blower unit.

  According to the present invention, the filter is disposed so as to partition the internal space of the box-shaped outer shell, the suction port is formed on one space side partitioned by the filter, and the discharge port is formed on the other partitioned space side. Connects the filter unit formed with a suction side connection part that connects the outdoor duct that communicates with the outside, and the indoor duct that is connected to the air intake of the ventilator that is installed behind the ceiling and supplies air to the room. And a filter unit fixture fixed to the indoor side wall surface. The filter unit includes the filter unit fixture, the suction port and the suction side connection portion, and the discharge port and the discharge unit. The side connection ports communicate with each other and are detachably attached, making it easy to clean the filter without dropping dust, etc. adhering to the filter indoors. Go to, can provide a sufficiently cleaned, is effective in that the air supply filter device.

  In addition, an outdoor duct in which a filter unit fixture composed of a back surface portion in contact with an indoor side wall surface and provided with a suction side connection portion and a top surface portion provided with a discharge side connection portion is inserted into a wall portion of a building. The interior of the outdoor duct can be easily cleaned by connecting and connecting to the indoor side end of the outdoor duct.

  Further, by forming a fitting groove of the filter on the outer wall surface of the outer wall of the filter unit and selectively mounting different types of filters, it is possible to easily select the filter corresponding to the outdoor environment.

  Further, since the filter is disposed horizontally, it is possible to suppress the adhesion of dust and the like to the filter and to collect the dust and the like in the filter unit.

  In addition, by arranging the filter vertically, the filter unit can reduce the thickness of the filter unit to the indoor side, increase the dust collecting effect of the filter, and suppress the decrease in the air volume due to the filter.

  In addition, by arranging the filter so as to be inclined with respect to the supply airflow, the filter unit reduces the thickness of the filter unit on the indoor side, while ensuring the filter's dust collection effect, and reducing the airflow by the filter. Can be suppressed.

  In addition, by providing an insect net on the upstream side of the filter, large dust and insects can be collected by the insect net and the life of the filter can be extended.

  Moreover, since the outer shell of the filter unit is made of foamed polystyrene, it is possible to prevent dew condensation in the air supply filter device attached to the indoor side wall surface.

  Further, the outer shell of the filter unit is blow-molded with a resin having an air layer inside, so that the occurrence of condensation can be prevented, and round cleaning and the like can be performed to improve the cleaning performance.

  In addition, the suction side connection portion is connected to the outdoor side duct with the outdoor side inclined low, and the lower end portion of the inner peripheral surface thereof is positioned below the lower surface of the inner wall of the outer shape, The water adhering to the water can be discharged outside without being retained.

  In addition, by providing a protrusion that fits and holds the outer shell of the filter unit at the lower part of the filter unit fixture, the filter unit is securely fixed to the filter unit fixture in a state that prevents the filter unit from falling. be able to.

  In addition, by providing a protrusion on the upper part of the filter unit fixture that fits and holds the outer shell of the filter unit, the air tightness at the contact surface between the filter unit and the filter unit fixture is increased. Wind leakage from the contact surface can be prevented.

  Further, by providing opposing side plates on both side surface portions of the filter unit fixture, and providing fitting portions for fitting and holding the outer periphery of the filter unit on the opposing side plates, the filter unit and the filter unit fixture The air tightness at the contact surface increases, and air leakage from the contact surface can be prevented.

  In addition, a wind screw from the contact surface between the filter unit and the filter unit fixture can be obtained by providing a thumbscrew to be screwed into the filter unit fixture while holding the outline of the filter unit at the front of the filter unit fixture. The prevention effect increases.

  Also, instead of the above ventilator, the filter unit mounting tool is provided with a blower unit with a blower installed therein, and the filter unit discharge port is communicated with the intake port of the blower unit, so that both the filter and the air supply blower are connected. It can be cleaned indoors, further improving cleanability.

FIG. 3 is an installation configuration diagram of an air supply filter device according to Embodiment 1 of the present invention. The perspective view from the filter unit side at the time of filter unit removal of the same air supply filter device Side sectional view showing the internal structure of the air supply filter device Exploded perspective view showing the filter unit of the air supply filter device The perspective view from the filter unit fixture side at the time of filter unit removal of the same air supply filter device The perspective view from the top at the time of filter unit removal of the air supply filter apparatus of Embodiment 2 of this invention Partial sectional view showing the filter unit of the air supply filter device The perspective view from the filter unit side at the time of filter unit removal of the same air supply filter device Side surface sectional view which shows the air supply filter apparatus of Embodiment 3 of this invention The perspective view from the filter unit side at the time of filter unit removal of the same air supply filter device

In the air supply filter device of the present invention, a filter is disposed so as to partition an internal space of a box-shaped outer shell, a suction port is formed on one side of the space partitioned by the filter, and the other partitioned space Indoor side connected to the suction unit connecting to the filter unit having a discharge port on the side, the outdoor duct communicating with the outside, and the ventilation unit installed behind the ceiling and supplying air to the room Provided with a discharge-side connection for connecting the duct in communication, and provided with a filter unit fixture fixed to the indoor side wall surface, the filter unit, the filter unit fixture, the suction port and the suction-side connection, The discharge port and the discharge side connection port are communicated with each other and are detachably mounted. When dust or the like adheres to the filter and the cleaning time comes, Remove the left filter unit over is housed, an effect that can be cleaned by carry the cleaning easy location.

Moreover, insertion and rear portions before SL is brought into contact with the interior side wall surface provided with the suction-side connecting portion, the filter unit fitting comprising a top part provided with the discharge-side connecting portion, the wall of a building When the filter unit is removed, the interior of the outdoor duct attached to the wall faces straight into the room and cleans the outdoor duct. It can be done easily.

The front SL to form a fitting groove of the filter in the outer inner wall of the filter unit, which selects freely mounted different types of filters, select the type of filter suitable for outdoor environment, easily filter Can be attached to the unit.

It is intended to pre-Symbol filters were horizontally arranged, the air supply flows to the upper side from the lower surface side of the filter, dust is gradually accumulated to fall into the outer downward while adhering to the lower surface side of the filter .

Further, the prior SL filter is obtained by vertically disposed, while suppressing the thickness of the interior side of the filter unit, it is possible to increase the effective area of the filter.

Also, the pre-Symbol filter, which is disposed so as to be inclined with respect to the air supply, by suppressing the thickness of the interior side of the filter unit, can be secured effective area of the filter.

Also, having thereon a insect net on the upstream side of the pre-Symbol filter can charge air flow before it passes through the filter, to collect large dust and insects in insect nets.

Also, an outer shell of the prior SL filter unit is obtained by constituting at Styrofoam, outer can become a heat insulating structure to prevent occurrence of condensation due to temperature difference between the outdoor air and the indoor.

Also, an outer shell of the prior SL filter unit is obtained by blow molding of a resin having an air layer therein, the outer is a heat insulating structure, preventing the occurrence of dew condensation due to temperature difference between the outdoor air and the indoor Moreover, since it is strong in water resistance and durability, it can be washed in a circle.

Further, the prior SL suction side connecting portion, is connected to the chamber outer duct is inclined lower the outdoor, which the inner circumferential surface lower portion is configured to positioned lower than the inner wall lower surface of the outer The water adhering to the outer wall by the supply of outdoor air smoothly flows down from the outdoor duct to the outside.

Further, the lower portion of the front Symbol filter unit fitting having thereon a projection that holds fitted an outer shell of the filter unit, can hold a filter unit to the filter unit fitting, in a state to prevent falling.

Further, the upper portion of the front Symbol filter unit fitting, said filter unit having thereon a projection that holds fitted an outer shell of, with respect to filter unit filter unit fitting, ensuring the horizontal direction of the holding As a result, the air tightness of the contact surface between the filter unit and the filter unit fixture is increased.

Further, the both side surfaces of the full I Luther unit fixture, the opposing side plates provided, which provided a fitting portion for holding fitted an outer shell of the filter unit to the opposing side plates, filter unit filter unit The fixture is securely held in the horizontal direction, and the air tightness at the contact surface between the filter unit and the filter unit fixture is increased.

Also, while holding the outer periphery of the filter unit to the front of the front Symbol filter unit fitting having thereon a thumbscrew screwed into the filter unit fitting against the filter unit is a filter unit fitting, front In this way, the horizontal holding is more reliable, and the air tightness at the contact surface between the filter unit and the filter unit fixture is higher.

In place before Symbol ventilator provided with a blower that internally provided an air blower to the filter unit fitting, the is at the outlet of the filter unit which communicates with the intake port of the blower, when the cleaning of the filter, The blower for supplying air can also be cleaned indoors together with the filter unit.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
As shown in FIG. 1, an air supply filter device 1 according to Embodiment 1 of the present invention has a built-in filter 2 for the purpose of cleaning outdoor air. First, the air passes through the outdoor duct 3 that is straightly inserted into the wall 10 of the building and communicates with the outside of the building, and enters the air supply filter device 1 from the suction-side connection 4 that is connected to the outdoor duct 3 to be described later. , Passes through the filter 2.

  And the indoor side duct 7 connected to the inlet port 6 of the ventilation apparatus 5 which has the air blower (not shown) installed in the back of the ceiling, and the discharge side connection provided in the air supply filter apparatus 1 The outdoor air that has passed through the filter 2 is sent to the ventilator 5 through communication with the unit 8. Therefore, the outdoor air sent to the ventilation device 5 is purified by passing through the air supply filter device 1, distributed from the ventilation device 5 to each living room by the indoor air supply duct 9, and supplied to the room.

  The air supply filter device 1 is composed of a filter unit fixture 11 fixed to the indoor side wall surface 10a and a filter unit 12 that can be detachably attached to the filter unit fixture 11 as shown in FIG. The filter unit fixture 11 has a back surface portion 11a connected to the indoor side end portion of the outdoor duct 3 and the suction side connection portion 4 connected to the indoor side duct 7 to the top surface portion 11b. On the other hand, the filter 2 is disposed in the filter unit 12 so as to partition the internal space of the box-shaped outer shell 13.

  More specifically, as shown in FIG. 3, the filter unit 12 is formed with a suction port 14 that communicates with the suction side connection portion 4 on one space side of the outer shell 13 partitioned by the filter 2. On the partitioned space side, a discharge port 15 communicating with the discharge side connection portion 8 is formed. On the other hand, in the filter unit attachment 11, the back surface portion 11a abuts on the indoor side wall surface 10a, and the suction side connection portion 4 It is attached in a state where it is directly connected to and communicated with the indoor side end of the outdoor duct 3 that is straightly attached to the wall 10.

  According to the air supply filter device 1 having the above-described configuration, the filter unit 12 that forms the air path by disposing the filter 2 in the box-shaped outer shell 13 is detachably attached to the filter unit fixture 11. When dust or the like adheres to the filter 2 and the cleaning time comes, the filter unit 12 with the filter 2 stored can be removed from the filter unit fixture 11 and carried to a place where it can be easily cleaned. The dust or the like adhering to the filter 2 can be sufficiently cleaned up to the inside without being dropped into the room.

  Further, when the filter unit 12 is removed, the inside of the suction side connection portion 4 of the filter unit fixture 11 and the outdoor side duct 3 inserted into the wall portion 10 faces the room in a straight state. It is possible to easily clean up to the inside of.

  In the above configuration, the filter 2 that is detachably attached to the filter unit 12 is arranged horizontally, so that the air supply air flows from the lower surface side to the upper surface side of the filter 2, and dust or the like flows in the filter 2. It adheres to the lower surface side and falls and accumulates in the lower part of the filter unit 12. Therefore, dust and the like can be prevented from adhering to the filter 2 and can be accumulated on the lower surface of the filter unit 12.

  In addition, an insect net 16 is provided on the upstream side of the filter 2 to prevent intrusion of coarse dust, small insects, and the like, and the outdoor air passes through the insect net 16 before passing through the filter 2. By doing so, since large dust and insects can be collected by the insect net 16, the life of the filter 2 can be extended.

  Further, as shown in FIG. 4, the filter unit 12 having a filter fixing portion 18 for fixing the filter 2 and an insect repellent net fixing portion (not shown) for fixing the insect repellent net 16 is made of polystyrene foam. The front panel 19 made of resin is provided so as to cover the outer shell 13 made of expanded polystyrene, and the front panel 19 and the outer shell 13 are fixed.

  With the above structure, the filter unit 12 can be made of heat-insulated structure with polystyrene foam, and can form an air passage that can prevent the occurrence of condensation due to a temperature difference with the room when supplying outdoor air into the room.

  Moreover, the suction side connection part 4 makes the front end side low toward the outdoor side, as shown in FIG. 3, so that it can connect with the outdoor side duct 3 (refer FIG. 1) constructed with the outdoor side inclined low. By being configured to be inclined and the lower end on the inner side of the inner peripheral surface thereof being positioned below the inner wall lower surface 20 of the outer shell 13, water is supplied into the outer shell 13 of the filter unit 12 by the supply of outdoor air. Even if it enters or adheres, it flows downward from the inner wall lower surface 20 of the outer wall 13 of the filter unit 12 and smoothly flows down from the outdoor duct 3 whose outdoor side is inclined low to the outdoor side. The water adhering to the inside can be discharged out of the room without stagnation.

  Further, the outer structure 13 of the filter unit 12 is made of resin, and the structure of the resin unit described below can be formed, whereby a fixing structure with the filter unit fixture 11 can be formed.

  As shown in FIG. 5, in order to fix the filter unit 12 and the filter unit fixture 11, a lower protrusion 21 for fitting and holding the outer shell 13 of the filter unit 12 is provided at the lower portion of the filter unit fixture 11. When the filter unit 12 is fixed to the filter unit fixture 11 by providing a recess 22 that fits with the lower protrusion 21 at the lower part of the outer shell 13 of the corresponding filter unit 12, the lower protrusion 21 and the recess 22 are fixed. By fitting the filter unit 12, the downward projection of the filter unit 12 is constituted by the lower protrusion 21 of the filter unit fixture 11, so that the filter unit 12 is prevented from falling on the filter unit fixture 11. It can be held and securely fixed to the filter unit fixture 11.

  Furthermore, by providing an upper protrusion 23 that fits and holds the outer shell 13 of the filter unit 12 at the top of the filter unit fixture 11, the filter unit 12 can be held in the horizontal direction with respect to the filter unit fixture 11. Since the airtightness at the contact surface between the filter unit 12 and the filter unit fixture 11 is increased, the air leakage from the contact surface can be prevented.

(Embodiment 2)
As shown in FIG. 6, the air supply filter device 1A according to the second embodiment of the present invention is arranged perpendicularly to the outer wall 13A of the filter unit 12A as compared with the air supply filter device 1 according to the first embodiment. Is different.

  Thereby, while the filter 2 is disposed in the horizontal direction, even when the area of the filter 2 is increased, the effective area of the filter 2 can be increased by suppressing the thickness 24 to the indoor side of the filter unit 12A. In addition, the dust collection effect of the filter 2 can be enhanced, and the air volume drop by the filter 2 can be suppressed.

  Then, the fitting groove 25 of the filter 2 is formed on the outer wall 17 of the filter unit 12A, and when the filter 2 is replaced, the filter is exchanged by inserting / removing the filter 2 along the fitting groove 25 in the vertical direction. Due to the structure and the difference in the type of the filter 2 corresponding to the outdoor environment in which the outdoor air that is supplied with air is different, the filter unit 12 can be fixed even when the filter 2 has a different thickness or filter width. A plurality of fitting grooves 25 that match the dimensions of the different types of filters 2 are formed in the outer wall surface 17 in advance.

  Accordingly, it is possible to easily replace the filter 2 or select and install the type of the filter 2 suitable for the outdoor environment.

  Further, as shown in FIG. 7, the outer shell 13A is formed as a single part by blow molding with a resin and has an air layer 26 inside.

  When the filter unit 12A is fixed to the filter unit fixture 11A to form an air passage and the outdoor air is ventilated, when the outdoor air is usually cold in winter and the indoor environment is warm, the temperature difference of the air May cause condensation on the surface of the outer shell 13A of the filter unit 12A. However, the blow molding has a structure having an air layer 26 inside, and the outer shell 13A has a heat insulating structure, which is caused by the temperature difference between the outdoor air and the room. Condensation can be prevented. In addition, since it is strong in water resistance and durability, it can be washed in a circle and the like, so that maintenance is improved.

  As a method for fixing the filter unit 12A and the filter unit fixture 11A, although not shown, the lower portion of the filter unit fixture 11A is fitted to the outer shell 13A of the filter unit 12A as in the first embodiment. A lower projection 21 is provided to hold the filter unit 12A, and a recess 22 that fits with the lower projection 21 is also provided at the lower part of one outer shell 13A to prevent the filter unit 12A from falling on the filter unit fixture 11A. It is set as the structure which hold | maintains to a state and fixes to the filter unit fixture 11 reliably.

  Further, as shown in FIG. 8, as the horizontal holding and fixing of the filter unit 12A and the filter unit fixture 11A, a side plate 27 facing both side portions 11c of the filter unit fixture 11A is provided. On the other hand, a concave portion 28 is provided, and on the other hand, a protruding portion 29 is provided on the opposite side surface portion 11c of the filter unit 12A, and the concave portion 28 and the protruding portion 29 are fitted when the filter unit 12A is fixed to the filter unit fixture 11A. As a result, the filter unit 12A is securely held in the horizontal direction with respect to the filter unit fixture 11A, the air tightness at the contact surface between the filter unit 12A and the filter unit fixture 11A is increased, and air leakage occurs. Can be prevented.

(Embodiment 3)
The air supply filter device 1B according to the third embodiment of the present invention is a fan that is installed behind the ceiling and supplies air to the room as shown in FIGS. 9 and 10 with respect to the air supply filter device 1 according to the first embodiment. It replaces with the ventilator 5 which has an apparatus, The point which set it as the structure which provided the ventilation part 31 which installed the air blower 30 in the filter unit fixture 11B, and connected the discharge port 15 of the filter unit 12B to the inlet 32 of the ventilation part 31. There is a feature.

  With the above configuration, the outdoor air cleaned by the filter 2 by the blower 30 provided in the blower 31 provided in the filter unit fixture 11B is discharged from the blower 31 to the discharge-side connecting portion 8 of the air supply filter device 1B. Is sent to the indoor duct 7 connected to the room, distributed from the indoor duct 7 piped through the back of the ceiling to each room, and supplied to the room.

  Thus, by providing the air blower 31 in which the blower 30 is provided in the filter unit fixture 11B, and by connecting the discharge port 15 of the filter unit 12B to the air intake 32 of the air blower 31, the filter 2 can be cleaned. Since the blower 30 for supplying air can also be cleaned indoors together with the filter 2 of the filter unit 12B, the cleaning performance is further improved.

  Further, by disposing the filter 2 so as to be inclined with respect to the air supply airflow, it is possible to secure the effective area of the filter 2 by suppressing the thickness 24 to the indoor side of the filter unit 12B to which the filter 2 is mounted. While suppressing the thickness 24 to the indoor side of the unit 12B, it is possible to secure the dust collecting effect of the filter 2 and to suppress a decrease in the air volume by the filter 2.

  Further, as a fixing method other than the fixing method of the filter unit 12 and the filter unit fixture 11 in the first embodiment and the second embodiment, the outer portion 13B of the filter unit 12B is held on the front portion of the filter unit fixture 11B. When the filter unit 12B is fixed by providing a thumbscrew 33 to be screwed to the filter unit fixture 11B, the user turns the thumbscrew 33 to screw it to the filter unit fixture 11B, and when removing it, When the user turns the thumbscrew 33 and removes the thumbscrew 33, the filter unit 12B is fixed.

  As a result, the filter unit 12B is firmly fixed at the front to the filter unit fixture 11B, and is more reliably held in the horizontal direction, and the air tightness at the contact surface between the filter unit 12B and the filter unit fixture 11B is secured. Therefore, the effect of preventing wind leakage will be enhanced.

  In the present invention, the filter is disposed inside the outer shell, and the filter unit in which the internal air passage space is partitioned by the filter is detachably provided on the filter unit fixture, so that the filter can be cleaned without polluting the room. It can be easily exchanged, and can be widely applied to devices that supply outdoor air into the room.

DESCRIPTION OF SYMBOLS 1 Air supply filter apparatus 1A Air supply filter apparatus 1B Air supply filter apparatus 2 Filter 3 Outdoor duct 4 Suction side connection part 5 Ventilation apparatus 6 Intake port 7 Indoor side duct 8 Discharge side connection part 10 Wall part 10a Indoor side wall surface 11 Filter Unit attachment 11A Filter unit attachment 11B Filter unit attachment 11a Back surface 11b Top surface 11c Side surface 12 Filter unit 12A Filter unit 12B Filter unit 13 Outer 13A Outer 13B Outer 14 Suction port 15 Outlet 16 Insect inner wall 17 20 inner wall lower surface 21 lower projection 23 upper projection 25 fitting groove 26 air layer 27 side plate 29 projection 30 blower 31 blower portion 32 intake port 33 thumbscrew

Claims (14)

A filter unit in which a filter is arranged so as to partition the internal space of the box-shaped outer shell, a suction port is formed on one side of the space partitioned by the filter, and a discharge port is formed on the side of the other partitioned space And a suction side connection part for connecting and connecting an outdoor duct communicating with the outside, and a discharge side connection part for connecting and connecting an indoor side duct connected to an intake port of a ventilator that is installed behind the ceiling and supplies air to the room A filter unit fixture that is fixed to an indoor side wall surface, wherein the filter unit includes the suction port and the suction side connection portion, the discharge port and the discharge side connection port. the each communicated, there is mounted detachably, a back portion which is brought into contact with the interior side wall surface provided with the suction-side connecting portion, provided with the discharge-side connecting portion The filter unit fitting comprising a surface, building air supply filter device characterized in that attaching communicatively connected to the interior side end of the outdoor side duct which is inserted into the wall of the. The filter unit of the fitting groove of the filter is formed in the outer inner wall surface, the type of selectively freely mounted different filter air supply filter apparatus of claim 1 Symbol mounting characterized. Air supply filter apparatus according to claim 1, characterized in that arranged the filter horizontally. Air supply filter apparatus of claim 1 Symbol mounting, characterized in that arranged the filter vertically. The filter of claim 1 Symbol mounting characterized by being arranged so as to be inclined with respect to the air supply air supply filter device. The air supply filter device according to any one of claims 1 to 5 , wherein an insect net is provided upstream of the filter. Claim 1 Symbol placement of supply air filter device, characterized in that outer were constituted by expanded polystyrene of the filter unit. Shell and air supply filter apparatus of claim 1 Symbol mounting, characterized in that the blow molding of a resin having an air layer inside the filter unit. The suction-side connecting portion is connected to the outdoor duct having the outdoor side inclined downward, and the lower end portion of the inner peripheral surface thereof is positioned below the lower surface of the inner wall of the outer shell. Item 2. The air supply filter device according to Item 1 . The filter at the bottom of the unit fixture, air supply filter apparatus according to claim 1, characterized in that a projection for holding fitted an outer shell of the filter unit. The filter at the top of the unit fitting, the air supply filter apparatus of claim 1 or 9 wherein fitted an outer shell of the filter unit, characterized in that a projection for holding. 10. The filter unit mounting device according to claim 1 or 9 , wherein opposing side plates are provided on both side surface portions, and fitting portions for fitting and holding the outer periphery of the filter unit are provided on the opposing side plates. Air supply filter device. The air supply filter device according to claim 1 or 9 , further comprising a thumbscrew that is screwed into the filter unit fixture while pressing an outline of the filter unit at a front portion of the filter unit fixture. Wherein instead of the ventilator is provided a blower which is internally provided an air blower to the filter unit fitting, the filter unit sheet of claim 1 Symbol placing the discharge port, characterized in that communicating with the intake port of the blower of Qi filter device.

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