JP3230454B2 - Air purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus capable of purifying pollutants such as odor components in the air using a photocatalyst.

[0002]

2. Description of the Related Art Conventionally, an air purifier having a light deodorizing function is known (for example, Japanese Patent Application Laid-Open No. 1-234729).
No.). In such an air purifying apparatus, the ultraviolet light emitted from the light source excites the photocatalyst, whereby the odor component contained in the air in the air passage is decomposed and the odor can be removed.

[0003] The air purifier using the photocatalyst has conventionally been configured as a wall-mounted type or a floor-mounted type. In such a type of air cleaning device, the air passage is formed in a substantially straight or L-shaped bent shape. At both ends of the air passage, there are provided both air inlets and air outlets, and a light source is arranged in the middle of the air passage so that light from the light source does not leak from both air holes. A member was provided in each of the vents.

[0004]

However, if the light-blocking members are provided at both vents of the air passage, respectively.
The ventilation resistance increases, and the driving noise increases accordingly. Further, the structure is complicated. By the way, the present applicant has encountered the following problem in an attempt to configure an air purifying device using a photocatalyst into a type that is not embedded in a ceiling. That is, in the ceiling-embedded type, since both the air inlet and the air outlet are arranged on the ceiling surface, both air holes can be visually recognized from a wide area in the living space below. Since light leakage through such a vent affects a wide area, it is necessary to ensure light shielding. However, if a light-shielding member having a complicated structure is used, the ventilation resistance is increased, and as a result, the operation noise is increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems and to provide a ceiling-built-in type air cleaning device using a photocatalyst, which has a simple structure and can prevent light leakage while suppressing an increase in ventilation resistance. It is to provide.

[0006]

According to a first aspect of the present invention, there is provided an air purifying apparatus comprising: a casing disposed in a space above a ceiling; And a ceiling-embedded air purifying device provided with an air passage having a bent portion in the middle thereof,
A light source that emits light containing ultraviolet light, a carrier that carries a photocatalyst that purifies contaminants by irradiating ultraviolet light from the light source, between the bent portion of the air passage and the suction port, A light-blocking member that is arranged near the mouth and traverses the air passage so as to block light from the light source ;
The light-shielding member is disposed between the light source and the light-shielding member, and the light-shielding member includes a plurality of parallel flat plates spaced apart from each other by a predetermined distance, and these parallel flat plates can suppress light leakage to the main living space in the room. Inclined at a predetermined angle to the vertical direction , and the light source
The light radiated from and passing through the carrier is returned to the carrier
It is characterized by being reflected toward .

According to this configuration, the following operation is achieved.
That is, since the light blocking member that traverses the air passage between the light source and the suction port includes a parallel flat plate that is inclined at a predetermined angle,
Light including ultraviolet rays can be prevented from leaking to the lower main living space through the suction port. Moreover, since the ventilation flow from the suction port can flow smoothly between the plurality of parallel flat plates of the light shielding member, it is possible to suppress an increase in ventilation resistance due to the light shielding member.

Further, as a result of reducing the light from the light source to the outlet by the bent portion of the air passage, the light shielding structure on the outlet side can be simplified or omitted. Therefore, the ventilation resistance can be reduced. Here, the main living space is a space set in advance below the casing, which is assumed to be occupied by a person.

It is preferable that the predetermined angle is set to, for example, 40 to 60 degrees in order to prevent light leakage while suppressing airflow resistance. The predetermined interval is set so as to suppress light leakage while suppressing airflow resistance. For example, the larger the predetermined interval, the lower the airflow resistance and the more the light leaks.

[0010] The air purifier may be any device as long as the photocatalyst can purify the air passing through the air passage. For example, a deodorizing type having only a deodorizing function or an air conditioning function incorporated in an air conditioner. May be provided. In addition, the parallel plate may include a plurality of groups inclined in opposite directions.

Further , since the light from the light source is blocked by the carrier, the light reaching the light blocking member can be reduced, so that the leakage of the light through the suction port can be more reliably prevented.

[0012] and may, if the light blocking member including a reflector,
It is possible to efficiently illuminate the photocatalyst by using not only light leakage prevention but also light reflected by the reflector, thereby achieving high purification ability.

Here, examples of the light-shielding member include a resin plate having a reflector made of an aluminum vapor-deposited surface, and a sheet metal having a glossy surface as the reflector. The air purifying apparatus according to the second aspect of the present invention is the first aspect.
The air cleaning apparatus according to, the light shielding member may be made of a metal plate material that is a sheet metal forming.

According to this structure, in addition to the function of the first aspect of the present invention, a plurality of parallel flat plates and a structure for supporting the flat plates can be easily manufactured by obtaining the light shielding member by sheet metal molding. In addition, since it is possible to easily select a metal plate material having excellent metallic luster with excellent reflection, a light shielding member having a reflection function can be obtained at low cost.

Further, the metal plate material has a higher light-shielding property and a higher rigidity than a resin material or the like, so that it can be formed of a thin plate, so that an increase in airflow resistance can be reliably prevented. Here, the light shielding member can be exemplified by an aluminum plate, a zinc iron plate, or the like. The air purifying apparatus of the invention according to claim 3 is claim 1 or
3. The air purifying apparatus according to 2 , wherein the light shielding member is made of a weather-resistant resin molded product.

According to this structure, in addition to the effect of the invention according to claim 1 or 2 , the plurality of parallel flat plates and the structure for supporting them can be easily manufactured by obtaining the light shielding member by resin molding. In addition, since the light-shielding member has weather resistance even if it is a resin molded product, there is a possibility that the light-shielding member may deteriorate over time even when exposed to ultraviolet rays from a light source or exposed to changes in temperature, humidity, airflow, and the like. Absent. Here, examples of the weather-resistant resin molded product include resins such as PS (polystyrene), PSS (polyphenylene sulfide), and PP (polypropylene).

An air purifying apparatus according to a fourth aspect of the present invention comprises:
The air purifier according to any one of claims 1 to 3 , wherein the light shielding member is formed integrally with a frame that holds the carrier. According to this configuration, in addition to the effect of the invention according to any one of claims 1 to 3 , the structure can be simplified because the light shielding member is integrated with the frame. In addition, the carrier and the light shielding member can be integrally handled, which is convenient.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Hereinafter, an air purifying apparatus according to an embodiment of the present invention is embedded in a ceiling in which a photocatalyst has a function of purifying pollutants and a light deodorizing unit and an indoor unit of an air conditioner having an air conditioning function. A type of air cleaning device will be described.

FIG. 1 is a schematic diagram showing an internal cross section of an air purifying apparatus of a ceiling embedded type according to one embodiment of the present invention. In each of the following drawings, an arrow X for indicating a left-right direction and an arrow Y for indicating a front-rear direction are shown as necessary. The air purifying device A is of a so-called ceiling embedded type, and includes an air purifying device main body A0 including a casing 1 disposed in a space behind the ceiling S2, and a decorative panel connected to a lower portion thereof and disposed on a ceiling surface T. And a unit A3. The decorative panel unit A3 has an inlet 4 and an outlet 5 formed therein. Air purifier A
Is formed with an air flow path through which a ventilation flow flows, and extends from the inlet 4 to the outlet 5 through the inside of the air purifier main body A0. Below the air purifier A, a main living space of the room S1, which is a target for purifying pollutants in the air, is set. Here, the main living space is a space that is set in advance below the casing 1 and is assumed to be located there.

The main body A0 of the air purifying apparatus comprises an indoor unit A1 of an air conditioner for air conditioning and an air purifying unit A2 for purifying pollutants by a photocatalyst, which are vertically stacked. Therefore, the casing 1 has an upper casing 11 included in the indoor unit A1, and a lower casing 21 attached to a lower portion of the upper casing 11 and included in the air cleaning unit A2.

The decorative panel unit A3 is provided on the lower surface of the lower casing 21 with a rectangular annular panel 30 along the ceiling surface T.
And a shielding plate 31 is arranged on the inner peripheral side of the panel 30. The shielding plate 31 is formed so as not to allow air to pass therethrough and not to transmit light. The gap between the edge of the shielding plate 31 and the inner peripheral edge of the panel 30 facing the edge forms the above-described suction port 4.
For example, the suction port 4 is formed to extend in a direction perpendicular to the paper surface of FIG. The above-described outlet 5 is formed on each of a pair of sides of the panel 30 parallel to the inlet 4.

The air purifying unit A2 is a light deodorizing unit 2 using a photocatalyst for removing odor components in the ventilation flow.
4, a pre-filter 23 for removing relatively large dust in the ventilation flow, a partition plate 22 made of sheet metal for mounting the pre-filter 23, and the lower casing 21 described above. The lower casing 21 includes the shielding plate 3.
1 and a central opening 21a extending above and below the suction port 4 and extending vertically, and an outer opening 21b extending above and below the outlet 5 and extending vertically. Outer opening 21b
And the central opening 21a are partitioned from each other. A light deodorizing unit 24 is arranged in an upper part in the central opening 21a. Further, below the light deodorizing unit 24, a pre-filter 23 is disposed above the suction port 4, and a partition plate 22 is disposed above the shielding plate 31, and a pair of pre-filters 23 is disposed.
Are arranged with the partition plate 22 interposed therebetween.

The indoor unit A1 includes a pair of heat exchangers 12 for adjusting the temperature of the ventilation flow, a blower fan 13 for generating a ventilation flow from the inlet 4 to the outlet 5, a blower fan 13, It has the above-mentioned upper casing 11 that houses the heat exchanger 12. The upper casing 11
The lower surface is formed in an open box shape, and a part of the air passage is defined therein. The upper casing 11 communicates with the central opening 21a and the outer opening 21b of the lower casing 21 inside thereof, while the blower fan 1 accommodated therein.
The light transmission is suppressed by the heat exchanger 3 and the heat exchanger 12.

The air passage is an air passage from the suction port 4 to the outlet 5 through the pre-filter 23, the inside of the light deodorizing unit 24, the blower fan 13, and the heat exchanger 12 (arrows B1 to B1).
B6). The air passage is formed by the central opening 21 a of the lower casing 21, and a portion of the airflow flowing upward from the suction port 4 to the blower fan 13 (arrows B <b> 1 to B
3), a bent portion 6 (arrow B4) partitioned in the upper casing 11 to reverse the ventilation flow, and an outer opening 21b of the lower casing 21 so that the ventilation flow is directed downward to the outlet 5. Heading part (arrows B5 to B
6), and has a substantially inverted U-shaped air path.

According to the air purifying apparatus A, when the blower fan 13 is operated, air is sucked from the suction port 4 (arrow B1), and the air is compared by the pre-filter 23 while the air flows upward through the air path. Very large dust is captured, and contaminants such as odor components are purified by the photodeodorizing unit 24 using a photocatalyst (arrows B2 to B3). The air is conditioned by the heat exchanger 12 while flowing through the bent portion 6 of the air passage. Thereafter, the air flows downward through the air passage and is blown out from the outlet 5 (arrows B4 to B6).

Hereinafter, the light deodorizing unit 24 will be described in detail. FIG. 2 is an exploded perspective view of the light deodorizing unit 24. FIG. 6 is a cross-sectional side view of a main part of the light deodorizing unit of FIG.
FIG. 7 is an enlarged sectional front view of the light deodorizing unit 24 of FIG. The light deodorizing unit 24 includes a photocatalyst element 61 in which a photocatalyst is supported by a honeycomb-shaped support described later.
And a light source 51 for irradiating the photocatalytic element 61 with ultraviolet light.
And The light source 51 is incorporated in the light source unit 50, and is attached to the rectangular upper case 41 together with a drive circuit 59 for causing the light source 51 to emit light. Below the light source unit 50, a photocatalytic element 61 is provided. The photocatalyst element 61 is detachably accommodated in a lower case 42 including a lower surface 42a and a peripheral wall 42b while being pressed and urged by an elastic member 62 such as a sponge or a spring. The lower case 42 is supported by a lower portion of the upper case 41 via a hinge 44 and an engagement tongue 45.

In the photo-deodorizing unit 24, a columnar light source unit 50 is arranged at the upper part so as to extend in the horizontal direction, and at the lower part, a plate-shaped photocatalytic element 61 is arranged with the plate surface horizontal. The light source unit 50 and the photocatalyst element 61 are provided in a plurality, for example, two each, and each light source unit 50 is located substantially above the center of each photocatalyst element 61.

The light deodorizing unit 24 is disposed between the bent portion 6 of the air passage and the suction port 4 (see FIG. 1). An opening 7 that defines a part of the air passage is formed in the lower surface 42a of the lower case 42. After passing through the opening 7, the air flow in the air passage is changed from below to the light deodorizing unit 2.
Flow into 4. After that, the ventilation flow is applied to the light deodorizing unit 2
4, passes through the photocatalytic element 61 as described later, passes around the light source unit 50, and
Flows upward through the inside of the ring.

In addition, the light deodorizing unit 24 suppresses light leakage from the inside to the bottom while allowing the air flow to flow through the inside. That is, a lower surface portion 42a described later as a light shielding member
However, it is disposed closer to the suction port 4 than the light source 51, for example, below the light source unit 50, across the air passage. The lower case 42 is provided below the light source unit 50.
The peripheral wall portion 42b and the cover plate 43 are arranged. The cover plate 43 is disposed adjacent to the side of the lower case 42,
Light from the light source 51 is prevented from leaking downward through the side of the lower case 42. The peripheral wall portion 42b is provided with the light source 5
1 prevents light from leaking to the side of the lower case portion lower surface portion 42a. In addition, the lower surface portion 42a of the lower case 42 can suppress light leakage from above to below as described later, while allowing the ventilation flow.

Hereinafter, each part will be described in detail. FIG. 4 is an enlarged cross-sectional front view of an end of the light source unit 50. Please refer to FIG. 4 and FIG. The light source unit 50 includes the light source 5 described above.
1 and a reflector 52 that reflects light from the light source 51. The light source 51 has a cylindrical shape, and the periphery thereof is covered with a cylindrical protection member 53. This protective member 53
It is made of a material that can transmit ultraviolet rays, such as a fluororesin, a silicone resin, a polyethylene resin, and a polyester resin, and protects the light source 51 while transmitting the ultraviolet rays. Both ends of the protection member 53 are connected to the end holding members 5 respectively.
4. The protection member 53 and the light source 51 are positioned coaxially with each other via an end holding member 54. The end holding member 54 protects a connection portion such as soldering between the end of the light source 51 and the power supply line 55. The light source unit 50 is fixed to the upper case 41 via a stopper 58 for screwing and fixing while holding the end holding member 54. In addition, the light source unit 50
It is attached to the upper case 41 together with the drive circuit 59 to form an integrated lighting unit.

The light source 51 is a straight tube cold cathode fluorescent lamp. Here, the cold cathode fluorescent lamp is a discharge lamp using a glow discharge, which operates in a regular glow discharge region and emits light from a phosphor excited by ultraviolet rays generated in a positive column. The wavelength of the emitted light can be changed by selecting the substance. Unlike the filaments used in conventional hot-cathode fluorescent lamps, the electrodes of cold-cathode fluorescent lamps use plate-like or cylindrical members, and cold-cathode fluorescent lamps are used in hot-cathode fluorescent lamps. In general, they are smaller and have a longer life. For example, a cold-cathode fluorescent lamp having a diameter of 1 to 5 mm can be used, which is much thinner than a hot-cathode fluorescent lamp which is a thin tube having a diameter of about 15 mm. The life of the cold cathode fluorescent lamp is as long as 20,000 hours.

The light source 51 is a black light lamp, which emits light in the visible light region having a wavelength of 400 nm or more and emits mainly light in the ultraviolet region. For example,
The wavelength of the emitted light is distributed in a range of 340 nm to 410 nm as shown in the spectral distribution graph of FIG.
m, and the component in the visible light region of 400 nm or more is extremely small. Note that the spectral distribution of light is not limited to such a distribution. In short, the wavelength is 320nm
It is preferable that the light source 51 mainly include light in the ultraviolet region of about 400 nm. Because 400nm
The light of the following wavelength activates the above-mentioned photocatalyst such as TiO ₂ and ZnO, can efficiently purify pollutants, and does not include a visible light region. be able to. In addition, light having a wavelength of 320 nm or more does not adversely affect the human body, unlike ultraviolet light having a shorter wavelength.

The reflector 52 is made of an adhesive tape. For example, a reflective tape such as an aluminum-deposited resin tape having an aluminum-deposited surface formed as a reflective surface on the surface of a resin tape or an aluminum tape can be used. The reflecting surface of the reflector 52 is attached to the upper portion of the outer peripheral surface on the opposite side to the photocatalytic element 61 along the outer peripheral surface of the light source 51. Therefore, the light from the light source 51 is reflected by the reflector 52 toward the photocatalytic element 61. Also,
The reflector 52 is supported by the light source 51 by being attached, and the structure can be simplified.

The reflector 52 has a light shielding property. Since the light from the light source 51 is blocked by the reflector 52, it is possible to prevent the light from being emitted to the bent portion 6 of the air passage behind the reflector 52.
As a result, it is possible to prevent light leakage at the outlet 5. The reflector 52 is an outer shell member 51 a made of a glass tube constituting the outer shell of the light source 51.
May be supported on the inner surface of Further, the reflector 52 may be provided on the inner surface or the outer surface of the protection member 53. Further, the reflector 52 may be provided integrally with the outer shell member 51a by vapor deposition or the like.

As described above, in the light source unit 50, the light from the light source 51 is emitted directly or reflected by the reflector 52 toward the lower photocatalytic element 61. FIG. 3 is a plan view of a schematic configuration of the photocatalytic element 61. The photocatalyst element 61 includes a photocatalyst and a carrier that supports the photocatalyst. The carrier includes a plurality of flat plates 61a parallel to each other, and a corrugated plate 61b disposed between the adjacent flat plates 61a. A large number of air passages are formed in a honeycomb shape by laminating a large number of flat plates 61a and corrugated plates 61b alternately.

The photocatalytic element 61 allows air to flow through the above-described multiple air passages.
Air flows from the front side to the back side of the paper. The photocatalyst element 61 is arranged such that the direction in which the flat plates 61a and the corrugated plates 61b are alternately stacked is orthogonal to the ventilation flow so that the ventilation flow can pass through the photocatalyst element 61 smoothly. The flat plate 61a and the corrugated plate 61b are made of paper or a material containing paper.

The photocatalyst element 61 carries a photocatalyst which decomposes odorous components upon irradiation with ultraviolet rays on the surface or inside of the flat plate 61a and the corrugated plate 61b constituting the above-mentioned carrier. For example, a flat plate 61a and a corrugated plate 61
The photocatalyst may be carried by applying a photocatalyst to at least one surface of b. In this case, it is preferable to apply the mixture with an adsorbent such as activated carbon or zeolite. This is because the odor component is decomposed by the photocatalyst while being physically adsorbed by the adsorbent, so that the deodorizing ability is high and the deodorizing ability can be maintained for a long time.

The photocatalyst element 61 is not limited to the above-described configuration. For example, the above-described honeycomb-shaped carrier is not limited to the one using the corrugated plate 61b. Further, a fiber such as a polyester-based nonwoven fabric as a carrier may be coated with a photocatalyst. As the photocatalyst element 61, in addition to a material sheet having a surface kneaded with a photocatalyst and an adsorbent as described above, an active carbon fiber yarn and a catalyst yarn woven into a single sheet, A sheet obtained by laminating a sheet containing fibers and a sheet containing catalyst yarns can be exemplified. The above-mentioned catalyst yarn is a yarn carrying the catalyst or, where possible, a yarn consisting of the catalyst itself.

The photocatalyst means a substance that absorbs light and gives the energy to a reactant to cause a chemical reaction.
Specifically, upon receiving irradiation with light including ultraviolet rays, holes generated on the surface of the photocatalyst react with water adsorbed on the surface of the photocatalyst to generate radical OH (hydroxyl radical), and this radical OH is By breaking molecular bonds of organic substances, for example, odor components such as ammonia are deodorized.

As the photocatalyst, titanium dioxide (TiO ₂ ), zinc oxide (ZnO), and tungsten trioxide having an anatase crystal structure can be used, but titanium dioxide is used in the following points. Is preferred. In other words, titanium dioxide can exert a sufficient deodorizing function even with weak ultraviolet light, and a wide range of odorous substances, for example, ammonia, acetaldehyde,
This is because the odor of acetic acid, trimethylamine, methyl mercaptan, hydrogen sulfide, styrene, methyl sulfide, dimethyl disulfide and isovaleric acid can be removed.

Referring to FIG. 2, FIG. 6 and FIG. The lower case 42 has a box-like shape opened upward, and has a rectangular lower surface portion 42a as the above-mentioned light shielding member, and a peripheral wall portion 4 extending so as to surround four sides of the lower surface portion 42a.
2b, and is formed of a sheet metal formed metal sheet (sheet metal).

A photocatalytic element 61 is accommodated in the lower case 42. The lower case 42 also serves as a frame that holds the photocatalytic element 61. The lower case 42 surrounds the photocatalyst element 61 with a peripheral wall portion 42b, and further includes a photocatalyst element 6 on the upper end portions of parallel flat plates 42c and 42d described later formed on the lower surface portion 42a.
1 is placed. The elastic member 62 described above is disposed between one side of the peripheral wall portion 42 b in the lower case 42 and one end of the photocatalytic element 61. The elastic member 62 presses the other end of the photocatalytic element 61 against the other side of the peripheral wall portion 42b opposite to the one side. The above-mentioned one side and the other side of the peripheral wall portion 42b of the lower case 42 have an extending portion 42g extending along the upper surface of the photocatalytic element 61 from the upper end thereof to the inside of the lower case 42. By engaging the extending portion 42g with the upper surface of the photocatalytic element 61,
The photocatalytic element 61 can be stably held.

The lower surface 42a has a plurality of parallel flat plates 42c and 42d separated by a predetermined distance Q from each other, and
And a vent 8 formed above the partition plate 22. These parallel flat plates 42c and 42d are inclined at a predetermined angle P with respect to the vertical direction so as to suppress light leakage into the main living space of the room S1. Here, the predetermined angle P is
For example, when the angle is set to 40 to 60 degrees, it is preferable in that light leakage is prevented while suppressing airflow resistance. The above-mentioned predetermined interval Q is set so as to suppress light leakage while suppressing airflow resistance. For example, the larger the predetermined interval Q is, the smaller the airflow resistance is, while the light is more likely to leak.

The parallel plates 42c and 42d are connected to the lower case 4
2 is formed by cutting and raising the plate-like lower surface portion 42a.
2a. The above-mentioned opening 7 is formed as a trace of the cut and raised.
As described above, the light from the light source 51 can be blocked by the inclined parallel flat plates 42c and 42d while the air is passed through the opening 7.

The parallel flat plates 42c and 42d include a plurality of groups inclined in opposite directions. For example, FIG.
The left parallel plate 42c of FIG. 7 is inclined to the left and the right parallel plate 42d of FIG. 7 is inclined to the right.
Therefore, as will be described later, the upper surface of the left parallel plate 42c reflects the light from the light source unit 50 rightward, and the right parallel plate 42d reflects the light from the light source unit 50 leftward.

The inclined flat plate has a high light-shielding property behind, that is, in the direction normal to the plate surface. For this reason,
The left parallel flat plate 42c can exhibit a high light-shielding property from immediately below to the left main living space, and the right parallel flat plate 42d can exhibit a high light-shielding property from directly below to the left main living space. can do. Further, the relative lowness of the light shielding property of the left parallel flat plate 42c from immediately below to the right main living space is compensated by the light being blocked by the partition plate 22, and the right parallel flat plate 42c is also shielded. The relatively low light-shielding property of the main living space 42 d from immediately below to the left is compensated by the light being blocked by the partition plate 22. As described above, the parallel flat plate arranged as described above can reliably prevent light from leaking to the main living space below the parallel flat plate.

The vent 8 is provided on the lower surface 42 of the lower case 42.
At the center of a, a plurality of long holes are formed. The long holes extend in parallel with the parallel flat plates 42c and 42d, and
2 and a part of the air passage. It is assumed that light leaks from above through the vent 8, but there is no problem because the light is blocked by the partition plate 22, the pre-filter 23 and the light shielding plate 31.

The lower case 42 includes a reflector 42 for reflecting light from the light source 51 toward the photocatalytic element 61.
e. For example, as the reflector 42e, a surface on the photocatalytic element 61 side of the lower case 42 made of a sheet metal material can be exemplified, and since this surface has luster, it functions as a reflection surface. Examples of such a sheet metal material include an aluminum plate and a zinc iron plate, and the reflector 42e can be easily obtained. After transmitting the light through the photocatalytic element 61, the light is reflected by the reflector 42e, and can illuminate the photocatalytic element 61 again. Therefore, the air can be efficiently purified by the photocatalyst. The light-shielding member having the reflector 42e may be a resin plate having the reflector 42e formed of an aluminum-deposited surface.

Next, the operation of the light deodorizing unit 24 will be described with reference to FIGS. As described above, the light from the light source 51 is irradiated directly downward or reflected by the reflector 52, so that the light from the light source unit 50 is irradiated onto the photocatalytic element 61 from above (arrow E). ). The light once transmitted through the photocatalyst element 61 is reflected by the reflector 42e of the lower case 42 and irradiates the photocatalyst element 61 from below (arrow F). As a result, the photocatalyst is activated by receiving ultraviolet rays from both the upper and lower directions, and efficiently purifies pollutants such as odorous components.

On the other hand, the light radiated upward from the light source 51 is blocked by the reflector 52, so that it is prevented from being radiated behind the reflector 52 (the range indicated by the arrow G in FIG. 6). As a result, light entering the bent portion 6 of the air passage can be reduced, and light reaching the outlet 5 can be reduced. Further, light emitted downward from the light source unit 50 is blocked by the photocatalytic element 61. The light transmitted through the photocatalytic element 61 is blocked by the lower surface 42a of the lower case 42,
2, shielded by the pre-filter 23 and the light shielding plate 31. As a result, it is possible to prevent light from leaking from the suction port 4 located therebelow.

According to the present embodiment, the following effects are obtained. That is, the lower surface 42a of the lower case 42 that crosses the air passage between the light source 51 and the suction port 4
Since it includes the parallel flat plates 42c and 42d inclined at the predetermined angle P, it is possible to suppress light including ultraviolet rays from leaking into the main living space below through the suction port 4. In addition, since the ventilation flow from the suction port 4 can flow smoothly between the plurality of parallel flat plates 42c and 42d, an increase in ventilation resistance due to the light blocking member can be suppressed.

Further, the light from the light source 51 to the outlet 5 can be reduced by the bent portion 6 of the air passage, so that the structure for shielding light on the side of the outlet 5 can be simplified,
It can be omitted. For example, in the present embodiment, a structure for blocking light is not particularly provided at the outlet 5. Therefore, the ventilation resistance can be reduced. Further, the photocatalytic element 61 is disposed between the light source 51 and the lower surface portion 42a, so that the photocatalytic element 61
Since the light from 1 is blocked, the light reaching the lower surface portion 42a can be reduced, and as a result, the leakage of light through the suction port 4 can be more reliably prevented.

Further, since the lower surface 42a of the lower case 42 as the light shielding member includes the reflector 42e, the light shielding member is not limited to simply preventing light leakage.
As a result of efficiently illuminating the photocatalyst by using the light reflected by e, a high purification ability can be achieved. Further, since the lower case 42 is made of a sheet metal material, a plurality of parallel flat plates 42c and 42d and a structure for supporting the same can be easily manufactured by sheet metal forming. In particular, if it is a metal plate, it can be easily selected to have a metallic luster with excellent reflection.
As a result, the light-shielding member having the reflection function can be obtained at low cost. Further, since the metal plate material has a higher light-shielding property and a higher rigidity than a resin material or the like, it can be formed of a thin plate, so that an increase in ventilation resistance can be reliably prevented.

The lower surface 42a as a light shielding member is
Since it is integrated with the lower case 42 as a frame holding the photocatalyst element 61, the structure can be simplified.
Further, the photocatalytic element 61 and the light shielding member can be handled integrally, which is convenient. Further, since the light from the light source 51 composed of a black light lamp hardly includes light in the visible light range, even if such light leaks out of the device, the surroundings do not become bright, but become bright. Therefore, it is possible to prevent the occurrence of inconvenience. Therefore, the structure for shading can be simplified or omitted, so that an inexpensive air purifying device with a simple structure can be realized.

Further, since the cold cathode fluorescent lamp is generally smaller in diameter and smaller in light emitting surface than the hot cathode fluorescent lamp, it is difficult for emitted light to go behind the light-shielding member. Light leakage can be more reliably prevented. Therefore, the structure for shading can be further simplified. The photocatalyst element 61 and the pre-filter 2
3 inhibits the passage of light from the light source 51,
Light reaching the suction port 4 from the light source 51 can be reduced. In particular, the light source 51 composed of a black light lamp
Little light in the visible light range emitted by the light source hardly reaches the suction port 4, so that light leakage from the suction port 4 can be more reliably prevented. In addition, the arrangement of the photocatalyst element 61 and the pre-filter 23, which is an essential configuration, can contribute to prevention of light leakage.

It is preferable to form the photocatalyst element 61 and the pre-filter 23 in a color whose brightness is set lower than a predetermined value in order to prevent light leakage. Note that the above-described lightness is a color attribute related to the relative lightness and darkness of the object surface. Further, the predetermined value is preferably 15 °,
Examples of the color having a brightness of 15 ° or less include a color ranging from gray to black and a dark color such as brown. Also,
The brightness and color of the pre-filter 23 and the photocatalytic element 61 may be different. Also, the pre-filter 23
It is sufficient that at least one of the photocatalyst elements 61 is set to the above-described brightness, and it is more preferable that both the pre-filter 23 and the photocatalyst element 61 are set to the above-described brightness. Further, the portion of the prefilter 23 and the photocatalytic element 61 set to the above brightness may be the entire member or only a portion through which light is transmitted.

By setting the brightness of the photocatalyst element 61 and the pre-filter 23 to be lower than the predetermined values, the photocatalyst element 61 and the like relatively hardly reflect light and easily absorb light. Transmission through the photocatalytic element 61 and the like can be suppressed, and as a result, light from the light source 51 to the suction port 4 can be further reduced. In particular, if the light is in a slight visible light range emitted by the black light lamp, light leakage from the suction port 4 can be more reliably prevented.

Further, by setting the brightness of the pre-filter 23 and the photocatalyst element 61, which are essentially essential components, the above-described effect of preventing light leakage can be obtained, so that the light shielding structure can be simplified. In the above embodiment,
As the light-shielding member, the lower surface 42a of the lower case 42 made of a sheet metal is exemplified, but the structure is not particularly limited. For example, the light shielding member may be made of a weather-resistant resin molded product. In this case, a plurality of parallel flat plates 42c and 42d and a structure for supporting the same can be easily manufactured by resin molding. In addition, a normal resin molded product may deteriorate over time when exposed to ultraviolet rays for a long period of time. However, even if the lower surface portion 42a is a resin molded product, the lower surface portion 42a has weather resistance. Even if it receives ultraviolet rays, there is no fear of deterioration over time. Further, the light shielding member tends to be exposed to changes in temperature, humidity, air flow, and the like by passing the ventilation flow between the opening 7 and the parallel flat plates 42c and 42d. There is no risk of deterioration over time due to the weather resistance of the molded product. Further, as the reflector 42e provided on the light-shielding member made of a resin molded product, an aluminum vapor-deposited surface formed on the surface of the light-shielding member can be exemplified. Here, as the above-mentioned weather-resistant resin molded product, for example, PS (polystyrene), PSS (polyphenylene sulfide), PP (polypropylene),
Resins such as polycarbonate and polytetrafluoroethylene can be exemplified, and those having weather resistance only by the resin or those having improved weather resistance by mixing an additive such as an ultraviolet absorber into the resin may be used. . In short, as a light shielding member, the light source 5 is disposed closer to the suction port 4 than the light source 51.
A plurality of parallel flat plates traversing the air path so as to block light from the light source 1, and are inclined at a predetermined angle with respect to the up and down direction so as to be able to suppress light leakage downward with a predetermined interval between each other. What is necessary is just to contain.

The predetermined interval Q between the parallel plates 42c and 42d is not limited to a fixed value. The parallel plate 42
Instead of c and 42d, a plurality of flat plates inclined in the same direction at different predetermined angles P may be used. Also, the photocatalytic element 6
In the case of No. 1, the air flow is permeable, but the present invention is not limited to this. For example, the photocatalyst element 61 may be made of a material that does not pass through a ventilation flow carrying a photocatalyst or the like. In this case, the photocatalytic element 61 is disposed so as to be inclined with respect to the ventilation flow so as not to hinder the ventilation flow as much as possible.

The air purifying device may be any type of air purifying device embedded in the ceiling which can purify the air passing through the air passage by the photocatalyst. For example, the air purifying device may be one which is incorporated in an air conditioner and has an air conditioning function. Alternatively, a deodorizing type having only a deodorizing function may be used, and in the case of a deodorizing type, the heat exchanger 12 can be omitted. The function of the photocatalyst to purify contaminants also includes, in addition to deodorization by removing odor components described above, decomposing contaminants that are not odor components, sterilizing microorganisms, inactivating viruses, and the like. . That is, the purification of air in the present invention is to remove components in the air harmful to humans.

In addition, various design changes can be made without changing the gist of the present invention.

[0062]

According to the first aspect of the present invention, the following effects can be obtained. That is, between the light source and the suction port, the light blocking member including a parallel flat plate inclined at a predetermined angle allows the air flow from the suction port to flow smoothly and suppresses the increase in the ventilation resistance, while the lower portion through the suction port. Light leakage to the light source.

Further, the light from the light source to the outlet can be reduced by the bent portion of the air passage, so that the light shielding structure on the outlet side can be simplified or omitted. Therefore, the ventilation resistance can be reduced. In addition , since the carrier disposed between the light source and the light blocking member can block light from the light source and reduce light reaching the light blocking member, it is possible to more reliably prevent light from leaking through the suction port.

Further , since the light shielding member includes a reflector, it is possible to not only prevent light leakage but also efficiently illuminate the photocatalyst to obtain a high purification ability. According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, a plurality of parallel flat plates and a structure for supporting the flat plates are easily manufactured since the light shielding member is formed of a metal plate formed by sheet metal forming. it can. In addition, since a metal plate excellent in reflection can be easily selected, a light shielding member having a reflection function can be obtained at low cost. Further, since the metal plate material has a higher light-shielding property and a higher rigidity than a resin material or the like, it can be formed of a thin plate, so that an increase in airflow resistance can be reliably prevented.

According to the invention of claim 3 , according to claim 1,
Further , in addition to the effects of the invention according to the second aspect , since the light shielding member is formed of a resin molded product, a plurality of parallel flat plates and a structure for supporting the same can be easily manufactured. Also, the light blocking member is
Even if it is a resin molded product, it has weather resistance, so that there is no danger of deterioration over time even if it is exposed to ultraviolet light from a light source or exposed to changes in temperature or the like.

According to the fourth aspect of the invention, the first aspect is provided.
Or in addition to the effect of the invention according to any one of 3, a frame body which holds the bearing member, by the light shielding member are integrally formed, the structure can be simplified. In addition, the carrier and the light shielding member can be handled integrally, which is convenient.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an internal cross section of a ceiling-embedded type air cleaning device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the light deodorizing unit of FIG.

FIG. 3 is a plan view of a schematic configuration of the photocatalytic element of FIG.

FIG. 4 is a sectional front view of an end of the light source unit of FIG. 2;

5 is a spectral distribution graph of the light source of FIG. 1, in which the horizontal axis represents wavelength (nm) and the vertical axis represents specific energy (%).

FIG. 6 is a sectional side view of a main part of the light deodorizing unit of FIG. 1;

FIG. 7 is an enlarged sectional front view of the light deodorizing unit of FIG. 1;

[Explanation of symbols]

 Reference Signs List A Air cleaning device 1 Casing 4 Suction port 5 Blow-out port 6 Bent portion 42 Lower case (frame) 42a Lower surface (light blocking member) 42c, 42d Parallel plate 42e Reflector 51 Light source 61a Flat plate (support) 61b Corrugated plate (support) Body) Arrows B1 to B6 Air path P Predetermined angle Q Predetermined interval S1 Indoor S2 Space above ceiling T Ceiling surface

Continuation of the front page (56) References JP-A-7-194684 (JP, A) JP-A-4-270831 (JP, A) JP-A-7-304332 (JP, A) (58) Fields investigated (Int) .Cl. ⁷ , DB name) F24F 1/00

Claims (4)

(57) [Claims] 1. A casing disposed in a space above a ceiling (S2).
Inside (1), there is provided an air passage (B1-B6) which communicates the suction port (4) opening to the ceiling surface (T) and the air outlet (5) and has a bent portion (6) in the middle. Air-purifying device with embedded ceiling (A)
A light source (51) that emits light containing ultraviolet light, and irradiation of ultraviolet light from the light source (51) between the bent portion (6) of the air air path (B1-B6) and the suction port (4). A carrier (61a, 61b) carrying a photocatalyst for receiving and purifying pollutants, and a suction port (4) rather than a light source (51)
A light-blocking member (42a) traversing the airflow path (B1-B6) so as to block light from the light source (51), and the carrier (61a, 61b) includes a light source (51). And light shielding member (42a) and
Disposed between said light shielding member (42a) includes a plurality of parallel plates separated by a predetermined distance (Q) between them (42c, 42d), these parallel plate
(42c, 42d) is inclined at a predetermined angle (P) with respect to the vertical direction so as to suppress light leakage into the main living space of the room (S1) ,
And the light radiated from the light source (51) and passing through the carrier is
An air purifier characterized by being reflected again toward the support (61a, 61b) . 2. The air purifying apparatus according to claim 1, wherein said light blocking member (42a) is made of a sheet metal formed metal plate. 3. A air cleaning apparatus according to claim 1 or 2. The light-shielding member (42a), the air cleaning apparatus characterized by comprising a resin molded article with a weather-resistant. The air cleaning apparatus according to any one of 4. The method of claim 1 to 3, the light shielding member (42a) is formed integrally with the frame (42) for holding the carrier (61a, 61b) An air purifying device characterized by: