JP2015109910A - Air purification device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air purification device sending air softly to a user to improve comfort while reducing noise during blowing.SOLUTION: An air purification device 10 houses a light source 14, a photocatalyst member 16 and a blower 18 inside a casing 12. The device purifies the air passing through the photocatalyst member 16 by ultraviolet irradiation from the light source 14, and circulates the air from a main body 20 of the casing 12 to a diameter expansion part 22 under the drive action of the blower 18. The air is sent out from a blowing port 86 of the blower 18 to a derivation chamber 64. Since air flow is split and dispersed by colliding with the inner peripheral face of a peripheral wall 46, an air flow rate is properly lowered. Accordingly, a blowing noise generating when the air is blown from a blowout port 52 into a chamber is prevented.

Description

  The present invention relates to an air purification apparatus that is installed indoors and purifies air in the room.

  2. Description of the Related Art Conventionally, there has been known an air purifying apparatus that can remove and deodorize organic matter in a room by installing and operating in a house room or a vehicle cabin. In such an air purification device, for example, as disclosed in Patent Document 1, an ultraviolet lamp is provided in the center of a cylindrical housing, and the cylindrical shape is formed so as to surround the outer peripheral side of the ultraviolet lamp. A photocatalytic member having air permeability is provided, and a blower is provided below the ultraviolet lamp and the photocatalytic member.

  In this air purification device, the photocatalyst member is activated by irradiating the photocatalyst member with ultraviolet rays from an ultraviolet lamp, and the air taken into the housing by operating the blower is allowed to pass through the photocatalyst member by photocatalysis. Therefore, air purified by removing odors and organic substances in the air is sent out indoors.

JP 2000-107276 A

  However, in the above-described air purification device, when the purified air is blown out from the inside of the housing, no consideration is given to the magnitude of the blowing sound, the blowing speed, etc. There is a concern that the sound may be struck, or the sound of ventilation may be annoying and impair comfort.

  The present invention has been made in consideration of the above-described problems, and is an air purifier that can improve comfort by performing gentle air blowing to the user while reducing noise during air blowing. An object is to provide an apparatus.

In order to achieve the above object, the present invention provides a light source that emits excitation light that excites a photocatalyst, a photocatalyst member that is disposed around the light source and has air permeability, and a blower that generates an air flow that passes through the photocatalyst member. And an air purification device having a light source, a photocatalyst member, and a casing that houses the blower therein,
The blower is disposed on the downstream side of the photocatalyst member, and is provided with a wind speed reduction unit having a large flow path cross-sectional area with respect to the opening area of the blower port between the blower port of the blower and the external blower outlet of the casing. To do.

  According to the present invention, in the air purification apparatus having the light source, the photocatalyst member, and the blower, the blower is disposed on the downstream side of the photocatalyst member, and the opening area of the blower opening between the blower outlet of the blower and the external blower outlet of the casing. On the other hand, a wind speed reducing section having a large channel cross-sectional area is provided. Then, when the air is passed through the photocatalyst member in which the photocatalyst is activated by the excitation light from the light source under the driving action of the blower and is led out from the blower port to the wind speed reducing unit, the opening area of the blower port is reduced. On the other hand, since the flow path cross-sectional area of the wind speed reducing portion is large, the wind speed is reduced.

  Therefore, since the air purified by the photocatalyst member can be sent from the external outlet to the room with the wind speed lowered, the comfort is impaired by blowing air toward the user with a moderate air volume. The wind noise when sending from the external outlet can be reduced. As a result, it is possible to improve comfort by blowing purified air into the room while reducing noise, and by blowing air gently to the user.

  In addition, since the casing has a collision wall that collides with the air sent from the air outlet, the air can be shunted and diffused by colliding with the collision wall, so that the air is sent from the external outlet to the room. It is possible to further reduce the wind speed at the time of wind and further reduce wind noise.

  Furthermore, by setting the opening area of the external air outlet larger than the opening area of the air outlet, the air whose speed is reduced in the wind speed reducing section is accelerated again when being sent from the external air outlet to the room. Therefore, air can be gently and surely sent into the room while the wind speed remains low.

  Furthermore, the air blower is a centrifugal air blower, and the air intake port of the centrifugal air blower and the opening of the axial end portion of the photocatalyst member are arranged to face each other so that at least a part thereof overlaps when viewed from the axial direction. It is possible to reduce the pressure loss of the blower when the mouth and the opening are arranged close to each other and flow the same amount of air. Therefore, it is possible to reduce the size of the blower, and accordingly, it is possible to ensure a large volume of the wind speed reducing unit.

  According to the present invention, the following effects can be obtained.

  That is, in the air purification apparatus having a light source, a photocatalyst member, and a blower, a wind speed reduction unit having a large flow path cross-sectional area with respect to the opening area of the blower opening is provided between the blower outlet in the blower and the external blower outlet of the casing. When air passes through the photocatalyst member where the photocatalyst is activated and is led out from the blower outlet to the wind speed reducing section, the wind speed decreases because the flow passage cross-sectional area of the wind speed reducing section is larger than the opening area of the blower opening. It will be. As a result, the air purified by the photocatalyst member can be sent from the external air outlet to the room with the wind speed lowered, so that the comfort may be impaired by applying the air to the user with a moderate air volume. In addition, it is possible to improve the comfort in the room by reducing the wind noise at the time of delivery from the external air outlet.

1 is an overall cross-sectional view of an air purification device according to an embodiment of the present invention. It is a top view of the air purification apparatus shown in FIG. It is sectional drawing along the III-III line of FIG.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of an air purifying apparatus according to the present invention will be given and described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates an air purification device according to an embodiment of the present invention.

  As shown in FIG. 1, the air purification device 10 includes a cylindrical casing 12, a light source 14 accommodated in the casing 12, a photocatalytic member 16 disposed on the outer peripheral side of the light source 14, And a blower 18 that takes air into the casing 12 and sends it out.

  The casing 12 is formed of, for example, a resin material and has a bottomed cylindrical main body 20 formed on one end side (arrow A direction) and the main body portion formed on the other end side (arrow B direction). And an enlarged diameter portion 22 that is larger than the diameter 20. Here, the case where the main body portion 20 is used as the lower side and the enlarged diameter portion 22 is used as the upper side will be described.

  The main body 20 is formed with a substantially constant diameter and a predetermined height along the axial direction (arrows A and B directions), and a first storage chamber 26 partitioned by a partition wall 24 is formed in the vicinity of the bottom thereof. A pair of first and second holding walls 28 and 30 spaced from each other by a predetermined distance from the partition wall 24 are formed. In the partition wall 24, a first connection portion 32 that holds one end portion of the light source 14 is formed on one end face (in the direction of arrow B) facing the first holding wall 28. A first control board 34 having an inverter circuit that drives and controls the light source 14 is stored in the first storage chamber 26 and is electrically connected to the first connection portion 32.

  The first holding wall 28 is provided substantially in parallel with the partition wall 24, and the light source 14 is inserted into the first hole 36 opened at the center thereof, and the first hole 36 has a predetermined radius on the outer peripheral side thereof. A recessed portion 38 that is recessed toward the partition wall 24 (in the direction of arrow A) is formed.

  The second holding wall 30 is formed substantially parallel to the first holding wall 28 at a predetermined distance from the other end side (in the direction of arrow B) of the casing 12, and a second hole 40 is formed at the center thereof. In addition to opening, a concave portion 42 is formed on the outer peripheral side of the second hole portion 40 and is recessed toward the other end side (in the direction of arrow B). The second hole portion 40 is formed with a larger diameter than the first hole portion 36 of the first holding wall 28, and the other end side of the light source 14 is inserted therethrough, and the air taken into the main body portion 20 is expanded in the diameter-enlarged portion 22. It also functions as a passage when flowing to the side (arrow B direction).

  On the other hand, a plurality of outside air inlets 44 are opened on the outer peripheral surface of the main body 20 to communicate the outside and the inside of the main body 20. The outside air introduction port 44 is formed in, for example, a substantially rectangular shape, is provided as a set with a predetermined spacing along the circumferential direction of the main body portion 20, and faces the photocatalyst member 16 housed in the main body portion 20. Are arranged as follows.

  The enlarged diameter portion 22 includes, for example, a peripheral wall 46 having a substantially constant diameter that is expanded radially outward with respect to the main body portion 20 and a ceiling portion 48 that covers an upper portion of the peripheral wall 46, and a lower end portion of the peripheral wall 46 is It joins so that it may reduce in diameter gradually with respect to the said main-body part 20. As shown in FIG. A second connection portion 50 extending toward the center of the enlarged diameter portion 22 is formed at the lower end portion of the peripheral wall 46, and the other end portion of the light source 14 is connected and held.

  As shown in FIGS. 1 and 2, the ceiling portion 48 is formed with a substantially semicircular air outlet (external air outlet) 52 at a position near the peripheral wall 46. The grid 54 is provided. That is, the air outlet 52 is formed in a slit shape opened by a plurality of lattices 54 with a predetermined width. Further, as shown in FIG. 2, a power switch 56 of the air purification device 10 and an indicator lamp 58 that is turned on / off according to the operating state are provided at a substantially central portion of the ceiling portion 48. On the other hand, on the inside of the ceiling portion 48, for example, a second control board 60 for performing drive control of the power switch 56 and the indicator lamp 58 is mounted and connected to the power switch 56 and the like.

  On the other hand, a second storage chamber 62 in which the blower 18 is stored and a lead-out chamber (wind speed reduction unit) 64 separated from the second storage chamber 62 are formed in the enlarged diameter portion 22. In the second storage chamber 62, a set of mounting flanges 66 projecting radially inward from the inner peripheral surface of the peripheral wall 46 is formed, and the blower 18 is fixed via bolts 68. Accordingly, the blower 18 is installed in a substantially horizontal state in the second storage chamber 62 so as to be orthogonal to the axis of the casing 12, and is disposed on the downstream side of the photocatalytic member 16 in the air flow direction in the casing 12. Has been.

  The lead-out chamber 64 is formed in a substantially semicircular cross-section so as to face the blowout port 52 and along the peripheral wall 46, the first partition wall 70 substantially parallel to the axis of the casing 12, the lower end portion of the first partition wall 70, and the aforementioned It is separated from the second storage chamber 62 by a second partition wall 72 that connects the inner peripheral surface of the peripheral wall 46. Further, the outlet chamber 64 communicates with the outlet 52. That is, the first and second partition walls 70 and 72 are formed in a substantially L-shaped cross section, and separate the lead-out chamber 64 inside the enlarged diameter portion 22.

  The first partition 70 is formed so as to face the second storage chamber 62, and the blower port 86 of the blower 18 is connected so as to penetrate the first partition 70. As a result, the air sucked in the second storage chamber 62 by the blower 18 is led out to the outlet chamber 64 through the blower port 86.

  Further, as shown in FIG. 3, the maximum flow path cross-sectional area B1 (width dimension of the first partition wall 70) of the outlet chamber 64 is formed larger than the opening area B2 of the blower port 86 in the blower 18 ( B1> B2).

  For example, a cold cathode fluorescent lamp in which a gas is sealed in a glass tube 74 is used as the light source 14, and the light source 14 is arranged on the main body portion 20 of the casing 12 along the axial direction (directions of arrows A and B) and on the axial line. Is done. One end portion of the light source 14 is connected to and held by the first connection portion 32, and the other end portion is connected and held by the second connection portion 50.

  The light source 14 energizes an electrode (not shown) provided inside the glass tube 74, and electrons collide with each other to emit ultraviolet light (excitation light). The electrode is energized through the first and second connection portions 32 and 50 to which both ends of the glass tube 74 are connected.

  The photocatalyst member 16 is provided, for example, so as to surround the outer peripheral side of the light source 14, is made of a porous body having a plurality of holes, and is formed so that air can pass between the outer peripheral side and the inner peripheral side. . The photocatalyst member 16 is formed in a cylindrical shape having an open center at one end and the other end, one end is held in the recess 38 of the first holding wall 28 via the spacer 76a, and the other end is the second. By being held in the recess 42 of the holding wall 30 via the spacer 76 b, it is stored and held inside the casing 12. The photocatalyst member 16 is arranged so that the center of the opening 78 opened in a circular cross section is on the axis of the main body 20 (see FIG. 3). That is, the photocatalytic member 16 is disposed coaxially with the main body 20 together with the light source 14.

  And when the ultraviolet-ray irradiated from the light source 14 strikes the photocatalyst member 16, a photocatalyst is activated and the organic substance and smell which are contained in the nearby air are decomposed | disassembled.

  As shown in FIGS. 1 and 3, the blower 18 is a centrifugal blower such as a sirocco fan, for example, and includes a housing 80 fixed to the casing 12 and a plurality of blades rotatably provided inside the housing 80. The housing 80 is fixed to the mounting flange 66 of the enlarged diameter portion 22 (see FIG. 3).

  As shown in FIG. 3, for example, the housing 80 is formed in a cylindrical shape so as to surround the drive source and the fan 82, and the cross-sectional area of the flow path formed in the housing 80 extends from the center toward the outer peripheral end. It is formed to gradually increase. As shown in FIG. 3, a suction port 84 for sucking air into the inside is formed on the lower surface of the casing 12 on the main body 20 side (in the direction of arrow A). A blower opening 86 opened in a substantially rectangular shape is formed. That is, in the housing 80, the suction port 84 and the blower port 86 are opened in directions orthogonal to each other.

  The suction port 84 is provided, for example, in a radially outward direction with a predetermined radius with respect to the center of the housing 80, and is divided into a plurality (for example, three) of openings along the circumferential direction.

  As shown in FIG. 3, the blower 18 is disposed such that at least a part of the suction port 84 overlaps the opening 78 of the photocatalyst member 16 disposed below when viewed in the axial direction. .

  On the other hand, the air blowing port 86 is connected so as to penetrate the first partition wall 70, and the air in the second storage chamber 62 sucked by the air blower 18 through the suction port 84 under the driving action of the fan 82 passes through the air blowing port 86. Is derived. The opening area B3 of the air outlet 52 in the casing 12 is formed larger than the opening area B2 of the air outlet 86 (B3> B2). Here, the opening area B3 of the air outlet 52 is a total area obtained by combining the areas of a plurality of openings opened in a slit shape.

  The air purifying device 10 according to the embodiment of the present invention is basically configured as described above, and the operation and effects thereof will be described next. Here, a case where the air purification device 10 is installed in a vehicle interior of a vehicle will be described.

  First, when an occupant (user) operates the power switch 56 of the air purification device 10 to turn on the power, the fan 82 of the blower 18 starts to rotate and the light source 14 is energized from the second control board 60. Start irradiating with UV. As a result, the air in the passenger compartment is sucked into the main body 20 through the pair of outside air inlets 44 under the driving action of the blower 18, and the photocatalyst member 16 is irradiated with ultraviolet rays from the inner peripheral side, so that the photocatalyst is Start to activate.

  And in the main-body part 20 of the casing 12, the organic substance and smell contained in air are decomposed | disassembled and removed under the effect | action of the activated photocatalyst, when air passes from the outer side of the photocatalyst member 16 inside. The purified air rises from the center of the photocatalyst member 16 and is sucked up to the blower 18 side (in the direction of arrow B) through the opening 78 and passes through the second hole 40 of the second holding wall 30 to the second storage chamber 62. Then, the air is sucked into the housing 80 from the suction port 84 of the blower 18.

  The air sucked into the housing 80 is sent from the blower opening 86 to the outlet chamber 64 of the casing 12 in a substantially horizontal direction under the rotating action of the fan 82, and thereby to the peripheral wall 46 of the outlet chamber 64. After colliding and diverging in various directions in the lead-out chamber 64 and diffusing, the air is blown out from the outlet 52 into the vehicle interior.

  In other words, by arranging the peripheral wall 46 so as to face the air outlet 86 of the blower 18, the air sent to the outlet chamber 64 is intentionally collided without directly flowing to the outlet 52. Yes.

  As a result, the air blown from the air outlet 52 into the vehicle compartment is sent out because the air speed is reduced by diverting compared to the case where the air from the air outlet 86 is sent directly without colliding with the peripheral wall 46. The wind noise is reduced and the wind speed is reduced by reducing the delivery speed, and the comfort of the occupant is not impaired, and the purified air is slowly sent to the passenger compartment at a desired air blowing speed. .

  The air purification device 10 described above is not limited to the case where it is installed and used in the vehicle interior of the vehicle as described above. For example, the air purification device 10 may be installed and used in the interior of a house. Good.

  As described above, in the present embodiment, in the air purification device 10, the air purified by passing through the photocatalyst member 16 in which the photocatalyst is activated is sucked into the blower 18 disposed on the downstream side, and the air outlet When the gas is sent from 86 to the outlet chamber 64 of the casing 12, it can be divided and diffused by being blown out so as to collide with the peripheral wall 46 of the outlet chamber 64. As a result, it is possible to reduce the wind speed of the air sent from the air outlet 52 to the room and send it to the user with a gentle air volume, and to reduce the wind noise when the air is sent from the air outlet 52. Can do.

  In this case, although the wind speed of the air blown out from the outlet 52 of the casing 12 into the room is reduced, there is no pressure loss in the outlet chamber 64, so that a sufficient flow rate of air passing through the photocatalyst member 16 is ensured. It becomes possible to do. Accordingly, it is possible to moderately reduce the momentum of the air sent from the outlet 52 to the room while maintaining the air purification performance by allowing the photocatalyst member 16 to pass through.

  Moreover, since the peripheral wall 46 is provided in the diameter-expanded part 22 of the casing 12 in the position where the air led out from the blower opening 86 of the blower 18 to the lead-out chamber 64 collides, the air collides with the peripheral wall 46. Therefore, the air can be diverted and diffused in the outlet chamber 64, and the wind speed when the air is sent from the outlet 52 to the room can be further reduced. Further, since the peripheral wall 46 is disposed so as to face the air outlet 86, the operation sound of the fan 82 radiated from the air outlet 86 is prevented from directly entering the room through the air outlet 52. Therefore, it is possible to further reduce noise.

  Further, by increasing the opening area B3 of the air outlet 52 with respect to the opening area B2 of the air outlet 86 in the blower 18, the air whose wind speed is reduced in the outlet chamber 64 is sent from the air outlet 52 into the room. In this case, it is possible to prevent the air from accelerating again, so that the air can be reliably fed into the room while the wind speed remains low.

  Furthermore, since the blower 18 is a centrifugal blower, the suction port 84 and the opening 78 of the photocatalyst member 16 are opposed to each other so that at least a part thereof overlaps when viewed along the axial direction of the casing 12. It is possible to arrange the suction port 84 and the opening 78 closer to each other, and the pressure loss of the blower 18 when the same amount of air flows can be reduced. As a result, since the output of the blower 18 can be reduced, it is possible to reduce the size of the blower 18, and accordingly, the volume of the second storage chamber 62 in the enlarged diameter portion 22 can be reduced, so that the volume of the outlet chamber 64 is relatively increased. Can be secured greatly. Further, the manufacturing cost can be reduced by reducing the size of the blower 18. Note that it is preferable to arrange the blower 18 and the photocatalyst member 16 on the same axis so that the pressure loss of the blower 18 can be further reduced and the volume of the outlet chamber 64 can be further increased.

  Further, in the air purification device 10 according to the above-described embodiment, the outlet chamber 64 is formed in a semicircular cross section, and the enlarged diameter portion 22 of the casing 12 having the outlet chamber 64 is formed in a circular cross section. However, the shape of the outlet chamber 64 and the enlarged diameter portion 22 may not be a semicircular cross section and a circular cross section, respectively. For example, the lead-out chamber 64 may be enlarged in the radial direction as necessary, and the shape of the enlarged diameter portion 22 may be a non-circular shape accordingly.

  Furthermore, although the collision wall which collides the ventilation from the air blower 18 in the casing 12 uses the peripheral wall 46 of the diameter-expanded part 22 in the said casing 12, it is not limited to this, For example, inside the derivation | leading-out chamber 64 In addition to the peripheral wall 46, a rib-like collision wall may be provided.

  The air purifying apparatus according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Air purification apparatus 12 ... Casing 14 ... Light source 16 ... Photocatalyst member 18 ... Air blower 20 ... Main-body part 22 ... Diameter expansion part 24 ... Partition wall 26 ... 1st storage chamber 44 ... Outside air introduction port 46 ... Peripheral wall 48 ... Ceiling part 52 ... Blowout port 62 ... Second storage chamber 64 ... Delivery chamber 78 ... Opening portion 82 ... Fan 84 ... Suction port 86 ... Blower port

Claims (4)

A light source that emits excitation light that excites a photocatalyst, a photocatalyst member that is disposed around the light source and has air permeability, a blower that generates an air flow that passes through the photocatalyst member, the light source, the photocatalyst member, and the blower In the air purification device having a casing for storing the inside,
The blower is disposed on the downstream side of the photocatalyst member, and a wind speed reduction portion having a large flow path cross-sectional area with respect to the opening area of the blower opening is provided between the blower outlet of the blower and the external blower outlet of the casing. An air purifier characterized by being provided. The air purification device according to claim 1, wherein
The air purification apparatus according to claim 1, wherein the casing has a collision wall that collides air sent from the blower port. The air purification apparatus according to claim 1 or 2,
An air purification device, wherein an opening area of the external air outlet is set larger than an opening area of the air outlet. In the air purification apparatus of any one of Claims 1-3,
The blower is a centrifugal blower, and the air suction port of the centrifugal blower and the opening of the axial end portion of the photocatalyst member are arranged to face each other so that at least a part overlaps when viewed from the axial direction. A featured air purification device.

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