JP7132563B2 - air purifier - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air purifier, and more particularly to an air purifier provided with an ultraviolet LED light source that emits ultraviolet light and a photocatalyst sheet that receives ultraviolet light from the ultraviolet LED light source and causes a photocatalytic reaction.

Conventionally, this type of air purifier is sold under the trade name of Lumineo by Maxell, Ltd., for example.

A photocatalyst-supporting mesh filter made by burning and adhering fine particles of titanium oxide, which act as a catalyst, to a titanium plate with fine holes arranged irregularly is placed inside the cylindrical body along the axial direction, and a plurality of ultraviolet rays are emitted. is arranged opposite to the photocatalyst-carrying mesh filter.

As a result, the photocatalyst carrying mesh filter is irradiated with ultraviolet rays from the ultraviolet LED light source to promote the photocatalytic reaction, thereby decomposing and removing bacteria, viruses, and odor sources in the air sucked by the built-in fan.

By the way, in the air purifier having the above configuration, a plurality of ultraviolet LED light sources are arranged in parallel in a linear manner along the flow direction of the sucked air (airflow direction). An area where the ultraviolet light from the ultraviolet LED light source does not reach is generated at a position facing between the arrays of the LED light sources, and bacteria, viruses, and odor sources in the air flowing through the area pass through without undergoing a catalytic reaction. become.

In addition, the flow speed of the air flowing inside the cylindrical body is not uniform within the cross section, and it becomes maximum at the central portion and gradually decreases as it approaches the inner wall surface due to the frictional force acting on the wall surface. Therefore, even if the air flowing inside the cylindrical body is evenly subjected to catalytic reaction by the photocatalyst-carrying mesh filter, the catalytic reaction time varies depending on the flow velocity, resulting in unevenness in the catalytic reaction.

Therefore, the present invention was invented in view of the above problems, and the purpose thereof is to uniformly and efficiently irradiate the air taken in with a photocatalyst by irradiating ultraviolet rays from an ultraviolet LED light source by a photocatalytic reaction. To provide an air cleaner capable of cleaning.

In order to solve the above problems, the invention described in claim 1 of the present invention provides a single LED mounting substrate in which a plurality of ultraviolet LED light sources that emit ultraviolet rays are mounted on both sides of the substrate member, and a sheet member. two photocatalyst sheets in which a photocatalyst is carried in the air are distributed in the longitudinal direction of the flow path, and the two photocatalyst sheets are arranged on both sides of the LED mounting substrate so as to face each other along the flow path with an air flow path interposed therebetween, and the LED The plurality of ultraviolet LED light sources arranged on each of both surfaces of the mounting substrate are positioned at predetermined intervals in the longitudinal direction of the flow channel and in a direction perpendicular to the longitudinal direction . The ultraviolet LED light sources located are fewer in number on the downstream side than on the upstream side of the flow path and are located in a region on the center side of the flow path, and the ultraviolet LEDs irradiate the center side of the photocatalyst sheet. It is characterized in that the number of light sources is greater than the number of the ultraviolet LED light sources that irradiate the inner wall side of the flow path of the photocatalyst sheet .

In addition, the invention described in claim 2 of the present invention provides a single LED mounting substrate in which a plurality of ultraviolet LED light sources that emit ultraviolet rays are mounted on both sides of the substrate member, and a sheet member carrying a photocatalyst. and a tubular flow path case containing the LED mounting substrate and the photocatalyst sheet and having an air flow path formed therein , wherein the air flows through the flow path. Circulating in the longitudinal direction, the two photocatalyst sheets are arranged on both sides of the LED mounting board so as to face each other along the air flow path with an air flow path interposed therebetween. The plurality of ultraviolet LED light sources arranged in are positioned at predetermined intervals in the longitudinal direction of the flow channel and in a direction perpendicular to the longitudinal direction, and the ultraviolet LED light sources positioned in a direction perpendicular to the longitudinal direction is smaller in number on the downstream side than on the upstream side of the flow path and located in the region on the central side of the flow path, and the number of the ultraviolet LED light sources that irradiate the central side of the photocatalyst sheet is It is characterized in that the number of the ultraviolet LED light sources is greater than the number of the ultraviolet LED light sources for irradiating the inner wall side of the flow path of the photocatalyst sheet .

In addition, the invention described in claim 3 of the present invention provides a single LED mounting substrate in which a plurality of ultraviolet LED light sources that emit ultraviolet rays are mounted on both sides of the substrate member, and a sheet member carrying a photocatalyst. and a tubular flow path case containing the LED mounting substrate and the photocatalyst sheet and having an air flow path formed therein , wherein the air flows through the flow path. Circulating in the longitudinal direction, the two photocatalyst sheets are arranged on both sides of the LED mounting board so as to face each other along the air flow path with an air flow path interposed therebetween. The plurality of ultraviolet LED light sources arranged in are positioned at predetermined intervals in the longitudinal direction of the flow channel and in the direction perpendicular to the flow channel, and the ultraviolet LED light sources positioned in the direction perpendicular to the longitudinal direction One surface side of the LED mounting substrate is located in a region on the central side of the flow channel, the number of which is smaller on the downstream side than on the upstream side of the flow channel, and the other surface side is located in the region of the flow channel. The number of the ultraviolet LED light sources located on the upstream side is smaller than that on the downstream side and is located in the region on the central side of the flow path, and the number of the ultraviolet LED light sources that irradiates the center side of the photocatalyst sheet is equal to the flow path inner wall of the photocatalyst sheet. It is characterized in that the number of the ultraviolet LED light sources that irradiate the side is larger than that of the ultraviolet LED light sources.

Further, the invention described in claim 4 of the present invention includes a plurality of LED mounting substrates in which a plurality of ultraviolet LED light sources that emit ultraviolet light are mounted on both sides of the substrate member, and a sheet member carrying a photocatalyst. a plurality of photocatalyst sheets, and a tubular flow path case that houses the LED mounting substrate and the photocatalyst sheet and has an air flow path formed therein , wherein the air flows through the flow path The plurality of LED mounting substrates and the plurality of photocatalyst sheets circulate in the longitudinal direction, and are alternately arranged opposite each other along the air flow path with an air flow path interposed therebetween. The plurality of ultraviolet LED light sources arranged in are positioned at predetermined intervals in the longitudinal direction of the flow channel and in a direction perpendicular to the longitudinal direction, and the ultraviolet LED light sources positioned in a direction perpendicular to the longitudinal direction is smaller in number on the downstream side than on the upstream side of the flow path and located in the region on the central side of the flow path, and the number of the ultraviolet LED light sources that irradiate the central side of the photocatalyst sheet is It is characterized in that the number of the ultraviolet LED light sources is greater than the number of the ultraviolet LED light sources for irradiating the inner wall side of the flow path of the photocatalyst sheet .

Further, the invention described in claim 5 of the present invention includes a plurality of LED mounting substrates in which a plurality of ultraviolet LED light sources that emit ultraviolet rays are mounted on both sides of the substrate member, and a sheet member carrying a photocatalyst. a plurality of photocatalyst sheets, and a tubular flow path case that houses the LED mounting substrate and the photocatalyst sheet and has an air flow path formed therein , wherein the air flows through the flow path The plurality of LED mounting substrates and the plurality of photocatalyst sheets circulate in the longitudinal direction, and are alternately arranged opposite each other along the air flow path with an air flow path interposed therebetween. The plurality of ultraviolet LED light sources arranged in are positioned at predetermined intervals in the longitudinal direction of the flow channel and in a direction perpendicular to the longitudinal direction, and the ultraviolet LED light sources positioned in a direction perpendicular to the longitudinal direction One surface side of the LED mounting substrate is located in a region on the central side of the flow channel, the number of which is smaller on the downstream side than on the upstream side of the flow channel, and the other surface side is located in the region of the flow channel. The number of the ultraviolet LED light sources located on the upstream side is smaller than that on the downstream side and is located in the region on the central side of the flow path, and the number of the ultraviolet LED light sources that irradiates the center side of the photocatalyst sheet is equal to the flow path inner wall of the photocatalyst sheet. It is characterized in that the number of the ultraviolet LED light sources that irradiate the side is larger than that of the ultraviolet LED light sources.

Further, according to the invention recited in claim 6 of the present invention, in any one of claims 1 to 5, the ultraviolet LED light source positioned in a direction orthogonal to the flow channel is the ultraviolet LED light source adjacent in the direction of the flow channel. It is characterized in that the ultraviolet LED light sources are positioned so as not to line up with each other in a straight line in the direction of the flow path.

Further, according to the invention recited in claim 7 of the present invention, in any one of claims 2 to 6, the LED mounting board includes the plurality of ultraviolet LED light sources mounted on one surface of the board member. It is characterized in that the plurality of ultraviolet LED light sources mounted on the other surface are positioned at mutually shifted positions with the substrate member interposed therebetween.

Further, the invention recited in claim 8 of the present invention is the one according to any one of claims 1 to 7, wherein the sheet member is made of a glass fiber base material or a metal mesh base material. .

According to the present invention, the LED mounting substrate and the photocatalyst sheet are arranged to face each other across the air flow path, and the ultraviolet LED light source on the side of the LED mounting substrate facing the photocatalyst sheet is arranged in the direction of the flow path and perpendicular to the flow path. Positioned at predetermined intervals in each direction, and the number of ultraviolet LED light sources located in the direction perpendicular to the flow channel is smaller on the downstream side than on the upstream side of the flow channel, and positioned in the region on the central side of the flow channel arranged to do so.

As a result, it has become possible to provide an air purifier that can uniformly and efficiently purify the air taken in by a photocatalytic reaction caused by a photocatalyst irradiated with ultraviolet rays from an ultraviolet LED light source.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view of the schematic diagram which shows the outline of the air cleaning part which comprises 1st Embodiment which concerns on the air cleaner of this invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 2 is a cross-sectional view taken along the line BB of FIG. 1; It is explanatory drawing which shows the structure of a photocatalyst sheet. FIG. 4 is an explanatory diagram showing the relationship between light emitted from an LED light source and a photocatalyst sheet; FIG. 10 is an explanatory diagram of an LED mounting substrate (comparative example) that constitutes an air cleaning unit of a conventional air cleaner. It is the graph which compared the purification performance of 1st Embodiment which concerns on the air cleaner of this invention, and the air cleaner of a conventional example. FIG. 10 is a top view of a schematic diagram showing an outline of an air purifying section constituting a second embodiment of the air purifier of the present invention; FIG. 10 is a schematic diagram of an LED mounting substrate that constitutes an air purifier of a second embodiment; FIG. 4 is a schematic diagram of an LED mounting substrate with different arrangements of LED light sources; FIG. 4 is also a schematic diagram of an LED mounting substrate with a different arrangement of LED light sources; It is a top view of the schematic diagram which shows the outline of the air cleaning part which comprises 3rd Embodiment which concerns on the air cleaner of this invention.

Preferred embodiments of the present invention will now be described in detail with reference to FIGS. 1 to 12 (same parts are denoted by the same reference numerals). Since the embodiments described below are preferred specific examples of the present invention, various technically preferable limitations are applied, but the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

FIG. 1 is a top view of a schematic diagram showing an outline of an air purifying unit constituting a first embodiment of the air purifier of the present invention, FIG. 2 is a cross-sectional view along AA in FIG. 1, and FIG. 3 is FIG. BB cross-sectional view of FIG. 4 is a configuration diagram of the photocatalyst sheet. This embodiment has the basic configuration of the air purifier of the present invention.

In the first embodiment of the air purifier of the present invention, the air purifier 1 that purifies the air taken in includes an LED mounting substrate 10 in which a plurality of LED light sources 12 are mounted on a substrate member 11, and As shown, a photocatalyst sheet 20 in which a photocatalyst 22 is supported on a sheet member 21 is accommodated inside the flow path case 2 .

The substrate member 11 constituting the LED mounting substrate 10 is, for example, a paper phenol substrate in which a paper substrate is hardened with phenol resin, a glass epoxy substrate in which cloth woven with glass fiber is hardened with epoxy resin, or a mixture of paper and glass substrates. A glass composite substrate hardened by heating, a metal substrate made of a metal material such as aluminum, a ceramic substrate made of a ceramic material, and the like are appropriately selected for use.

As the LED light source 12, an ultraviolet LED light source (hereinafter abbreviated as "LED light source") that emits ultraviolet light is used, and is selected from those having a peak emission wavelength in the range of 365 nm to 405 nm, for example.

As shown in FIG. 2, a plurality of (six in this embodiment) LED light sources 12 are mounted on one side of the substrate member 11 in an appropriate arrangement.

In the following description, in order to specify the mounting positions of the six LED light sources 12 on the board member 11, the rectangular board member 11 has four ends, from the side of the one end 11a to the one end 11a. The direction toward the opposing other end portion 11b is defined as the vertical direction, and the direction orthogonal to the vertical direction, in other words, the extending direction of each of the one end portion 11a and the other end portion 11b is defined as the horizontal direction.

The specific mounting position of the six LED light sources 12 on the substrate member 11 is as follows: three LED light sources 12a are mounted in a straight line in the horizontal direction at a position near one end 11a of the substrate member 11; One LED light source 12c is mounted at a laterally central position in the vicinity of the other end 11b. Two LED light sources 12b are mounted linearly in the horizontal direction at an intermediate position between the two.

Therefore, the six LED light sources 12 (12a, 12b, 12c) mounted on the substrate member 11 are formed in a substantially triangular shape with one end portion 11a side of the substrate member 11 as the base side and the other end portion 11b side as the vertex side. Implemented.

In this case, one or a plurality of LED light sources 12 adjacent to each other in the vertical direction are mounted so as not to line up in a straight line in the vertical direction. Specifically, the three LED light sources 12a and the two LED light sources 12b adjacent to them in the vertical direction are mounted so as not to line up in a straight line in the vertical direction. The LED light sources 12b and the LED light source 12c adjacent to them in the vertical direction are mounted so as not to line up in a straight line in the vertical direction.

The sheet member 21 constituting the photocatalyst sheet 20 is made of, for example, a glass fiber base material formed into a sheet of glass fiber, or a metal mesh base material formed of a metal material into a mesh sheet.

As the photocatalyst 22, for example, titanium oxide is used, the photocatalytic reaction of which is efficiently promoted by the ultraviolet rays from the LED light source 12. As shown in FIG.

A photocatalyst sheet 20 is formed by supporting a photocatalyst 22 on the sheet member 21 .

As shown in FIGS. 1 and 3, the LED mounting substrate 10 and the photocatalyst sheet 20 are accommodated in a rectangular tubular flow path case 2 that forms a flow path 3 for the air taken into the air purifier.

At this time, the photocatalyst sheet 20 is arranged near the inner wall 4a of one of the four inner walls 4 in the flow path case 2 along the inner wall 4a, and the LED mounting board 10 is arranged with six LED light sources 12 is arranged along the inner wall 4b in the vicinity of the inner wall 4b on the side opposite to the inner wall 4a in the flow channel case 2, with the light irradiation direction of the light directed toward the photocatalyst sheet 20 side.

Moreover, the LED mounting board 10 accommodated in the flow path case 2 is arranged in the direction in which the number of the LED light sources 12 (12a) mounted in the lateral direction with respect to the air flow (air flow) flowing in the flow path case 2 is large. The end (one end 11a) side of is located on the upstream side of the airflow. In other words, the LED mounting substrate 10 accommodated in the flow path case 2 is arranged such that the bottom side of the LED light source 12 mounted in a substantially triangular shape is positioned upstream of the air flow flowing in the flow path case 2 . , the vertex side is located on the downstream side of the airflow.

Therefore, when the LED light source 12 arranged on the LED mounting substrate 10 is turned on in the air cleaning unit 1 having the above configuration, as shown in FIG. The supported photocatalyst is irradiated, and active oxygen having a strong oxidizing power is generated on the surface of the photocatalyst due to the photocatalytic reaction in the light-irradiated region 5 .

In this state, when air is taken into the channel case 2 by an intake means such as an intake fan (not shown), the channel 3 formed between the LED mounting substrate 10 and the photocatalyst sheet 20 is formed. Flows from upstream to downstream, and along the way, the part of the photocatalyst sheet 20 that comes in contact with the irradiation area of the ultraviolet rays emitted from the LED light source 12 and the part that passes through the vicinity of it. etc. are decomposed and removed by the redox action of the active oxygen generated by the photocatalytic reaction of the photocatalyst supported on the photocatalyst sheet 20, and cleaned.

By the way, the photocatalytic reaction by the photocatalyst sheet 20 is such that when the air flowing in the flow path case 2 is affected by the action once in the middle of the flow, most of the effect of the purification action in the flow path is obtained by that one photocatalytic reaction. It has been experimentally confirmed that even if the photocatalyst reaction is performed again downstream, the purification action cannot be obtained as much as that of the first photocatalytic reaction. That is, even if two or more photocatalytic reaction regions are provided in one channel in the channel case 2, most of the effect of the photocatalytic reaction in the channel case 2 is obtained by the photocatalytic reaction in the photocatalytic reaction regions located upstream. will be

Therefore, looking at this embodiment from this point of view, the air taken into the flow path case 2 passes through the LED light sources 12 a densely arranged in the lateral direction of the LED mounting substrate 10 in the upstream portion of the flow path 3 . The photocatalytic reaction of the photocatalyst sheet 20 that receives the irradiated light purifies the whole, and most of the purifying action of the air flowing in the flow path case 2 is performed in the upstream portion of the flow of this air flow.

At the same time, the flow velocity of the air flowing inside the flow path case 2 is faster on the central side than on the inner wall side inside the flow path case 2 . Therefore, the air that has been purified by the photocatalytic reaction in the upstream portion of the flow path case 2 undergoes the photocatalytic reaction longer than the air that has flowed on the inner wall side and the air that has flowed on the central side. It is effectively promoted, and the effect of decomposing and removing airborne bacteria, viruses, odor sources, etc. is enhanced.

Therefore, by mounting the six LED light sources 12 in a substantially triangular shape on the substrate member 11 to form the LED mounting board 10, the LED light source located in the central portion of the LED light sources 12 arranged in a substantially triangular shape Due to the photocatalytic reaction by the LED light source 12b and the LED light source 12c located at the tip, the purification action of the fast-flowing air flowing through the central side of the flow path case 2 is promoted.

As a result, it is possible to uniformly obtain the effect of decomposing and removing bacteria, viruses, sources of odors, etc. in the air flowing through the passage case 2 .

In order to verify the purification effect by the photocatalytic reaction obtained by the above arrangement position of the LED light source 12 arranged on the LED mounting substrate 10 in the air cleaner having the air cleaning unit 1 having the above configuration, the present inventors conducted experiments using an LED light source. A comparison experiment was conducted with the purification effect of an air purifier having an air purifier (not shown) using an LED mounting board 51 on which 50 is mounted as shown in FIG.

In the comparative experiment, the air purifier of this embodiment having the air purifier 1 configured as described above using the LED mounting board 10 in which the six LED light sources 12 are arranged in a substantially triangular shape with respect to the direction of air flow was carried out. As an example, a conventional air purifier having an air purifier using an LED mounting substrate 51 (see FIG. 6) on which 6 LED light sources 50 are arranged in parallel with each other in three pieces with respect to the direction of air flow is used as a comparative example. did.

Then, each of the example and the comparative example was placed in an airtight space of 100 liters in which acetaldehyde with a concentration of 6.5 ppm was enclosed, and the elapsed time (minutes) from the start of operation (start of lighting of the LED light source) We investigated the change in the concentration of acetaldehyde in an airtight space against

The results are shown in the graph of FIG.

From FIG. 7, in the air cleaner of the comparative example, the acetaldehyde concentration in the airtight space decreased to 2.5 ppm concentration 10 minutes after the start of operation, and the concentration became almost 0 30 minutes after the start of operation. On the other hand, in the air purifier of Example, the acetaldehyde concentration in the airtight space decreased to 1.5 ppm concentration 10 minutes after the start of operation, and the concentration became almost 0 20 minutes after the start of operation.

From this, it took 30 minutes for the acetaldehyde concentration in the airtight space to become almost 0, whereas the example achieved about 66% in 20 minutes. Even in the middle of the process, the acetaldehyde concentration with respect to the time axis is lower in the example than in the comparative example.

Therefore, the plurality of LED light sources 12 on the LED mounting board 10 are arranged in a substantially triangular shape, with the base side positioned on the upstream side of the air flow. By arranging them so that they do not line up in the direction of flow, the photocatalytic reaction against bacteria, viruses, and sources of odors in the flowing air is performed efficiently, resulting in high decomposition and removal effects, and air with high purification performance. A purifier is realized.

Next, a second embodiment of the air purifier of the present invention will be described below.

The air purifying unit 30 constituting the air purifier of the second embodiment has the structure of the air purifying unit 1 constituting the above-described first embodiment with one LED mounting substrate 10 and one photocatalyst sheet 20. are arranged facing each other to form one air flow path therebetween, whereas FIG. ), two photocatalyst sheets 20 are arranged facing each other on both sides of one LED mounting board 31 with the LED mounting board 31 interposed therebetween, one between each (a total of two sheets). air flow paths 35a and 35b are arranged in parallel.

In order to configure the second embodiment, as shown in FIG. forming

The arrangement of the LED light sources 33 arranged on one side of the LED mounting board 31 is the same as the arrangement of the LED light sources 12 in the LED mounting board 10 used in the air cleaner 1 of the first embodiment. is done.

That is, the six LED light sources 33 (33a, 33b, 33c) are mounted in a substantially triangular shape with one end portion 32a side of the substrate member 32 as the base side and the other end portion 32b side as the vertex side. One or a plurality of adjacent LED light sources 33 are mounted so as not to line up in a straight line in the vertical direction. Specifically, the three LED light sources 33a and the two LED light sources 33b adjacent to them in the vertical direction are mounted so as not to line up in a straight line in the vertical direction. The LED light sources 33b and the LED light source 33c vertically adjacent to them are mounted so as not to be vertically aligned with each other.

The arrangement of the LED light sources 34 arranged on the other surface of the LED mounting board 31 is obtained by rotating the arrangement of the LED light sources 33 arranged on the one surface side of the LED mounting board 31 by 180°. .

That is, six LED light sources 34 (34a, 34b, 34c) are mounted in a substantially triangular shape with one end 32a side of the substrate member 32 as the top side and the other end 32b side as the base side, and One or a plurality of adjacent LED light sources 34 are mounted so as not to be vertically aligned with each other. Specifically, the three LED light sources 34a and the two LED light sources 34b adjacent to them in the vertical direction are mounted so as not to line up in a straight line in the vertical direction. The LED light sources 34b and the one LED light source 34c vertically adjacent to them are mounted so as not to be vertically aligned with each other.

In this way, the LED mounting board 31 in which six LED light sources 33 and 34 are mounted on each of the two surfaces has the LED light source 33 arranged on one side of the LED mounting board 31 and the LED light source 33 on the other side. All of the arranged LED light sources 34 are not arranged at the same position across the substrate member 32, and the four LED light sources (33a: 2 pieces, 34a: 2 pieces) are all shifted from each other. placed in position.

Therefore, the heat generated when each of the LED light sources 33 and 34 is lit is not locally concentrated in all the LED light sources 33 and 34 but is partially dispersed with respect to the substrate member 32 . As a result, the heat generated by the LED light sources 33 and 34 is appropriately dissipated, the temperature rise due to the self-heating of the LED light sources 33 and 34 is suppressed, and the luminous efficiency is reduced due to the temperature rise of the LED light sources 33 and 34. In addition to suppressing the decrease, it is also possible to suppress the shortening of the light emitting life (element life) due to the deterioration of the LED light sources 33 and 34 due to the temperature rise of the LED light sources 33 and 34. High reliability can be maintained over a long period of time while ensuring reliability over a long period of time.

In addition, the air flowing through the air flow path 35a formed between the LED mounting board 31 and the photocatalyst sheet 20 arranged opposite to the side of the LED mounting board 31 on which the LED light source 33 is mounted, and the LED The air that flows through the air flow path 35b formed between the mounting board 31 and the photocatalyst sheet 20 that is arranged opposite to the side of the LED mounting board 31 on which the LED light source 34 is mounted is substantially the same. photocatalyst with an efficiency of

Thus, in the air purifier of the second embodiment, one flow path that performs the purification action in the air purifier of the first embodiment is divided into two flow paths, and the air flowing through each flow path is divided into two flow paths. Purification action is performed against As a result, the photocatalytic reaction against bacteria, viruses, odor sources, etc. in the air flowing in the two flow paths is performed at nearly twice the efficiency of the first embodiment, resulting in a high decomposition and removal effect. Therefore, it is possible to realize an air purifier with high purification performance.

As shown in FIG. 10, for example, the LED mounting board 31 maintains the substantially triangular arrangement of the LED light sources 33 and 34 arranged in a substantially triangular shape at positions rotated by 180° on both surfaces of the substrate member 32 . The LED light sources 33 mounted on one surface of the substrate member 32 and the LED light sources 34 mounted on the other surface are all mutually mounted with the substrate member 32 interposed therebetween. It can be positioned in an offset position.

Alternatively, for example, as shown in FIG. 11, the LED light sources 33 and 34 arranged in a substantially triangular shape at the same positions on both sides of the substrate member 32 are moved vertically relative to each other while maintaining the substantially triangular arrangement. By mounting, the LED light source 33 mounted on one surface of the substrate member 32 and the LED light source 34 mounted on the other surface can be positioned at mutually shifted positions with the substrate member 32 interposed therebetween.

As a result, the heat generated when the LED light sources 33 and 34 are lit does not concentrate locally at all, and the heat generated when the LED light sources 33 and 34 are lit is efficiently dispersed with respect to the substrate member 32 so that the LEDs A rise in temperature due to self-heating of the light sources 33, 34 is suppressed more effectively, thereby realizing further improvement in the reliability of the LED light sources 33, 34 and improvement in the efficiency of the purification action.

As shown in FIG. 12, the air purifier 40 constituting the air purifier of the third embodiment includes a plurality of LED mounting substrates (three in this embodiment) 41 and a plurality of of photocatalyst sheets (four in this embodiment) 20 are alternately arranged in parallel at predetermined intervals.

In this case, the photocatalyst sheets 20 are positioned on both outermost sides, and the LED light sources 42 and 43 are arranged on both sides of each of the three LED mounting boards 41 .

As a result, six air flow paths 44a to 44f are formed by the LED mounting substrate 41 and the photocatalyst sheet 20 arranged opposite to each other, and the photocatalytic reaction of the air flowing through the respective flow paths 44a to 44f causes bacteria in the air and Viruses and sources of odors are decomposed and removed, and a compact air purifier with extremely high purification performance is realized.

In this case, the plurality of LED light sources 42 and 43 arranged on both sides of the LED mounting board 41 are similar to the LED light sources 33 and 34 arranged on the LED mounting board 31 constituting the second embodiment. has a placement position of

If the heat generated by the LED light sources does not adversely affect the purification performance, it is conceivable to dispose the LED light sources mounted on both sides of the substrate member at the same position across the substrate member. As a result, the air that has flowed through the plurality of flow paths can receive photocatalytic action with substantially the same efficiency.

The plurality of LED light sources mounted on one side or both sides of the substrate member are not limited to the arrangement described above, and the power of ultraviolet rays emitted from the LED light sources, heat generation, flow rate of purified air, flow velocity and An appropriate arrangement can be considered in consideration of various conditions such as the efficiency of the photocatalytic reaction.

By the way, the above-mentioned invention relates to an air purifier, but the function as a water purifier can be improved by flowing water (dirty water) instead of air between the LED mounting substrate and the photocatalyst sheet facing each other. can be fulfilled.

DESCRIPTION OF SYMBOLS 1... Air cleaning part 2... Flow path case 3... Flow path 4... Inner wall 4a... Inner wall 4b... Inner wall 5... Light irradiation area 10... LED mounting substrate 11... Substrate member 11a... One end 11b... The other end 12... LED light source 12a... LED light source 12b... LED light source 12c... LED light source 20... Photocatalyst sheet 21... Sheet member 22... Photocatalyst 30... Air cleaner 31... LED mounting board 32... Board member 32a... One end 32b... Other end 33... LED light source 33a LED light source 33b LED light source 33c LED light source 34 LED light source 34a LED light source 34b LED light source 34c LED light source 35 flow path 35a flow path 35b flow path 40 air cleaner 41 LED Mounting board 42... LED light source 43... LED light source 44... Flow path 44a to 44f... Flow path 50... LED light source 51... LED mounting board

Claims (8)

a single LED mounting substrate in which a plurality of ultraviolet LED light sources that emit ultraviolet rays are mounted on one side of the substrate member;
one photocatalyst sheet formed by supporting a photocatalyst on a sheet member;
A cylindrical flow path case containing the LED mounting substrate and the photocatalyst sheet and having an air flow path formed therein ,
the air circulates in the longitudinal direction of the flow path,
The LED mounting substrate and the photocatalyst sheet face each other along the air flow path on both sides with the light irradiation direction of the plurality of ultraviolet LED light sources facing the photocatalyst sheet side. placed and
A plurality of ultraviolet LED light sources arranged on the LED mounting substrate are positioned at predetermined intervals in the longitudinal direction of the flow channel and in a direction perpendicular to the longitudinal direction, and are positioned in a direction perpendicular to the longitudinal direction . The number of the ultraviolet LED light sources is smaller on the downstream side than on the upstream side of the flow path and is located in a region on the central side of the flow path ,
The air purifier , wherein the number of the ultraviolet LED light sources that irradiate the center side of the photocatalyst sheet is larger than the number of the ultraviolet LED light sources that irradiate the flow path inner wall side of the photocatalyst sheet . a single LED mounting board in which a plurality of ultraviolet LED light sources that emit ultraviolet light are mounted on both sides of the board member;
two photocatalyst sheets formed by supporting a photocatalyst on a sheet member;
A cylindrical flow path case containing the LED mounting substrate and the photocatalyst sheet and having an air flow path formed therein ,
the air circulates in the longitudinal direction of the flow path,
The two photocatalyst sheets are arranged on both sides of the LED mounting substrate so as to face each other along the flow path with an air flow path interposed therebetween,
The plurality of ultraviolet LED light sources arranged on each of both surfaces of the LED mounting substrate are positioned at predetermined intervals in the longitudinal direction of the flow channel and in a direction orthogonal to the longitudinal direction, and are orthogonal to the longitudinal direction . The ultraviolet LED light sources located in the direction are fewer in number on the downstream side than on the upstream side of the flow path and are located in a region on the central side of the flow path ,
The air purifier , wherein the number of the ultraviolet LED light sources that irradiate the center side of the photocatalyst sheet is larger than the number of the ultraviolet LED light sources that irradiate the flow path inner wall side of the photocatalyst sheet . a single LED mounting board in which a plurality of ultraviolet LED light sources that emit ultraviolet light are mounted on both sides of the board member;
two photocatalyst sheets formed by supporting a photocatalyst on a sheet member;
A cylindrical flow path case containing the LED mounting substrate and the photocatalyst sheet and having an air flow path formed therein ,
the air circulates in the longitudinal direction of the flow path,
The two photocatalyst sheets are arranged on both sides of the LED mounting substrate so as to face each other along the flow path with an air flow path interposed therebetween,
The plurality of ultraviolet LED light sources arranged on each of both surfaces of the LED mounting substrate are positioned at predetermined intervals in the longitudinal direction of the flow path and in a direction perpendicular to the flow path, and are perpendicular to the longitudinal direction . The ultraviolet LED light sources located in the direction are located in a region on the central side of the flow channel, and the number of the ultraviolet LED light sources on the one surface side of the LED mounting substrate is smaller on the downstream side than on the upstream side of the flow channel, and on the other side is located in a region on the central side of the flow channel, the number of which is smaller on the upstream side than on the downstream side of the flow channel ,
The air purifier , wherein the number of the ultraviolet LED light sources that irradiate the center side of the photocatalyst sheet is larger than the number of the ultraviolet LED light sources that irradiate the flow path inner wall side of the photocatalyst sheet . a plurality of LED mounting substrates each having a plurality of ultraviolet LED light sources mounted on both sides of the substrate member;
a plurality of photocatalyst sheets formed by supporting a photocatalyst on a sheet member;
A cylindrical flow path case containing the LED mounting substrate and the photocatalyst sheet and having an air flow path formed therein ,
the air circulates in the longitudinal direction of the flow path,
The plurality of LED mounting substrates and the plurality of photocatalyst sheets are alternately arranged to face each other along the flow path with an air flow path interposed therebetween, and the plurality of photocatalyst sheets are arranged on both sides of the LED mounting substrate. The ultraviolet LED light sources are positioned at predetermined intervals in the longitudinal direction of the flow channel and in a direction perpendicular to the longitudinal direction, and the ultraviolet LED light sources positioned in the direction perpendicular to the longitudinal direction are located in the flow channel. The downstream side is smaller in number than the upstream side and is located in the region on the central side of the flow path ,
The air purifier , wherein the number of the ultraviolet LED light sources that irradiate the center side of the photocatalyst sheet is larger than the number of the ultraviolet LED light sources that irradiate the flow path inner wall side of the photocatalyst sheet . a plurality of LED mounting substrates each having a plurality of ultraviolet LED light sources mounted on both sides of the substrate member;
a plurality of photocatalyst sheets formed by supporting a photocatalyst on a sheet member;
A cylindrical flow path case containing the LED mounting substrate and the photocatalyst sheet and having an air flow path formed therein ,
the air circulates in the longitudinal direction of the flow path,
The plurality of LED mounting substrates and the plurality of photocatalyst sheets are alternately arranged to face each other along the flow path with an air flow path interposed therebetween, and the plurality of photocatalyst sheets are arranged on both sides of the LED mounting substrate. The ultraviolet LED light sources are positioned at predetermined intervals in the longitudinal direction of the flow channel and in the direction perpendicular to the longitudinal direction , respectively, and the ultraviolet LED light sources positioned in the direction perpendicular to the longitudinal direction are arranged on the LED mounting substrate One surface side of the downstream side of the flow path is smaller in number than the upstream side of the flow path and is located in the central side region of the flow path, and the other surface side is upstream of the downstream side of the flow path is smaller in number and located in the region on the central side of the flow channel ,
The air purifier , wherein the number of the ultraviolet LED light sources that irradiate the center side of the photocatalyst sheet is larger than the number of the ultraviolet LED light sources that irradiate the flow path inner wall side of the photocatalyst sheet . The ultraviolet LED light sources positioned in a direction orthogonal to the flow channel are positioned such that none of the ultraviolet LED light sources adjacent to each other in the direction of the flow channel are aligned linearly in the direction of the flow channel. The air purifier according to any one of claims 1 to 5, characterized in that: In the LED mounting board, the plurality of ultraviolet LED light sources mounted on one surface of the substrate member and the plurality of ultraviolet LED light sources mounted on the other surface of the substrate member are shifted from each other across the substrate member. 7. The air purifier according to any one of claims 2 to 6, characterized in that it is located at the position. The air purifier according to any one of claims 1 to 7, wherein the sheet member is made of a glass fiber base material or a metal mesh base material.

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