JP2004242865A - Photocatalyst module and cleaning device using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photocatalyst module which flexibly corresponds to a required cleaning capacity, develops excellent adsorbability and decomposability and restores photocatalytic decomposability even if this decomposability lowers, and a cleaning device using it. <P>SOLUTION: Since photocatalyst beads 52B are housed in a photocatalyst part 52 formed of a frame body 51 and a net member 52A so as to be possible to take out, they are easily taken out of the frame body 51 and a work for replacement or the like can be easily performed. Further, the amount of the photocatalyst beads 52B can be increased or decreased corresponding to a required cleaning capacity and, since only the photocatalyst beads 52B are replaced when the photocatalyst beads 52B are deteriorated and another part can be successively used, a running cost can be reduced. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a photocatalyst module and a cleaning device using the same, and more particularly, to a photocatalyst module excellent in removing harmful pollutants such as odor components contained in gas or liquid and a cleaning device using the same.
[0002]
[Prior art]
Conventionally, a cleaning device that decomposes and removes odors and harmful substances in the air by using a photocatalyst such as titanium dioxide is known. A fine powder of the photocatalyst is carried as a thin film on a substrate surface, and the photocatalyst is irradiated with ultraviolet rays. There is a device that utilizes a high oxidizing power generated by exciting a compound to decompose an organic compound or the like (for example, see Patent Document 1).
[0003]
FIG. 13 shows an air cleaning device disclosed in Patent Document 1. The air cleaning device 70 includes a container 71, deodorized particles 72 made of an adsorbent having a photocatalyst, and an ultraviolet light source 73 housed inside the container 71 and irradiating ultraviolet rays. A fan 74 for feeding air from the direction, and stirring the deodorized particles 72 in the container 71 with the air sent based on the rotation of the fan 74 to adsorb the odor component in the air to the deodorized particles 72, The odor component is decomposed by exciting the photocatalyst of the deodorized particles 72 moved to the irradiation region 73.
[0004]
[Patent Document 1]
JP 2000-202015 A (FIG. 1)
[0005]
[Problems to be solved by the invention]
However, according to the conventional cleaning device using a photocatalyst, a sufficient surface area of the photocatalyst region for adsorbing harmful pollutants such as odor components and a pump light necessary for decomposing the adsorbed harmful pollutants by the photocatalyst are used. Since the irradiation amount is necessary, even if the surface area of the photocatalyst region is sufficient, the irradiation amount of the excitation light is insufficient, or the surface area of the photocatalyst region cannot be secured even if the irradiation amount of the excitation light is sufficient. In this case, there is a problem that not only sufficient air purification property cannot be obtained but also harmful pollutants are spread by stirring.
[0006]
Further, since the purifying ability required for the purifying apparatus differs from place to place, it is necessary to prepare a plurality of purifying apparatuses having different purifying capacities in order to meet all the requirements, and the management cost becomes large. Further, when the decomposition ability of the photocatalyst is reduced, the cleaning device itself must be replaced, which causes a problem that the running cost is increased.
[0007]
Therefore, an object of the present invention is to provide a photocatalyst module which can flexibly cope with a required purification capacity, exhibits excellent adsorption and decomposability, and can recover even if the photocatalytic degradability decreases, and a photocatalyst module using the same. To provide a cleaning device.
[0008]
[Means for Solving the Problems]
The present invention, to achieve the above object, a light source emitting active radiation,
A photocatalyst portion that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photocatalyst module, comprising: a housing that houses the light source and the photocatalyst unit therein and is provided so as to be able to be taken out from the inside.
[0009]
According to the photocatalyst module described above, active radiation for exciting the photocatalyst is irradiated to a wide area of the photocatalyst unit, and the photocatalyst unit can be taken out independently of the light source.
[0010]
Further, the present invention, in order to achieve the above object, a light source emitting active radiation,
A photocatalyst portion that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photocatalyst module comprising: a contamination detection unit configured to detect a contamination state of the photocatalyst based on light transmittance of the photocatalyst unit.
[0011]
According to the photocatalyst module described above, by detecting that the photocatalyst is contaminated, it becomes possible to prevent the spread of contaminants from spreading.
[0012]
Further, the present invention, in order to achieve the above object, a light source emitting active radiation,
A photocatalyst portion that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photocatalyst module having a housing that accommodates the photocatalyst section and the light source therein and that is capable of being taken out of the interior,
A purifying unit for disposing the photocatalyst module on a path through which the gas or the liquid passes.
[0013]
According to the cleaning device using the photocatalyst module described above, it is possible to selectively provide a photocatalytic function according to a required purification ability according to a combination of the photocatalyst modules.
[0014]
Further, the present invention, in order to achieve the above object, a light source emitting active radiation,
A photocatalyst portion that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photocatalyst module having a contamination detection unit that detects a contamination state of the photocatalyst based on the light transmittance of the photocatalyst unit,
A purifying unit for disposing the photocatalyst module on a path through which the gas or the liquid passes.
[0015]
According to the photocatalyst module described above, by detecting that the photocatalyst is contaminated, the spread of the contaminant can be prevented, and the cleaning device can be used in a stable state.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 shows a cleaning device using a photocatalyst module according to a first embodiment of the present invention. FIG. 1 (a) is an exploded perspective view of a cleaning device 1. The cleaning device 1 includes a suction unit 2 having an operation unit 2A and a pre-filter for separating substances such as large dust and dust from air. Unit 3, an adsorption filter unit 4 for adsorbing a substance that has passed through the pre-filter unit 3, a photocatalyst module 5 having a control unit 5A for driving a built-in LED light source, and air from the suction unit 2. The exhaust unit 6 includes a rotating fan 6A and an outlet grill 6B provided on the outlet side to protect the fan 6A.
[0018]
FIG. 1B is a perspective view of the photocatalyst module 5. This photocatalyst module 5 is composed of two rows of photocatalyst modules 50 that are formed by sandwiching a photocatalyst unit 52 using a photocatalyst between a pair of frame bodies 51 in a height direction T in ten layers. It is arranged and arranged.
[0019]
FIG. 2 shows a partial perspective view of the photocatalyst module 50. The photocatalyst module 50 includes a frame 51 formed by extruding a metal such as aluminum having excellent mechanical strength and heat dissipation, and a pair of mesh members 52A sandwiched between a pair of frames 51 arranged vertically. And a photocatalyst part 52 formed by housing photocatalyst beads 52B housed in a space formed by the pair of frame members 51 and the pair of net members 52A.
[0020]
The frame body 51 has a substantially U-shaped cross-section, is housed in the cross-section, and emits ultraviolet light for exciting the photocatalytic beads 52B. A groove 51B for accommodating a wiring not to be formed, a light-transmitting resin body 51C protruding toward the photocatalyst portion 52, a groove 51D supporting the light-transmitting resin body 51C, and a groove supporting the net member 52A. 51E, a trapezoidal projection 51F and a trapezoidal groove 51G formed on the outer surface for connection with the adjacent photocatalyst module 50, screw holes 51H and 51I for fixing a lid, which covers an end face, described later, and an LED ultraviolet light source And a photodiode 51J for receiving the ultraviolet light emitted from 51A via the photocatalyst beads 52B.
[0021]
The LED ultraviolet light source 51A includes an ultraviolet LED 51a that emits ultraviolet light having a wavelength of 360 to 400 nm as active radiation, a reflecting mirror 51b that reflects the ultraviolet light toward the photocatalyst unit 52, and a convex engaging portion 51c that engages with the groove 51B. And The ultraviolet LED 51a may be a resin mold type or a chip LED. A plurality of LED ultraviolet light sources 51A can be provided according to the length of the frame 51.
[0022]
The light transmissive resin body 51C is formed of polycarbonate, and is formed with a space around the LED ultraviolet light source 51A so that light is irradiated to the photocatalyst beads 52B of the photocatalyst section 52 over a wide range.
It should be noted that another material having light transmittance, excellent mechanical strength, and UV resistance can also be used.
[0023]
The mesh member 52A has slits formed at intervals smaller than the particle diameter of the photocatalyst beads 52B, and the surface thereof is coated with titanium dioxide as a photocatalyst. In addition, you may use the mesh member 52A which is not coated with a photocatalyst.
[0024]
The photocatalyst beads 52B are formed by coating silica gel having a diameter of 1 mm having a light transmittance with titanium dioxide as a photocatalyst.
[0025]
FIG. 3 shows a state in which a plurality of photocatalyst modules 50 are connected. The LED ultraviolet light source 51A is partially cut away. Here, the photocatalyst modules (50A to 50D) are vertically and horizontally connected by trapezoidal projections 51F and trapezoidal grooves 51G. Although four photocatalyst modules (50A to 50D) are shown in the figure, more photocatalyst modules 50 can be connected.
[0026]
Thus, the plurality of photocatalyst modules 50 can be connected in a number corresponding to the required purification capacity. The end faces of the photocatalyst module 50D are covered by fixing the lids 53A and 53B with screws 54, thereby preventing the photocatalyst beads 52B and the LED ultraviolet light source 51A from falling off. The lids 53A and 53B can be individually removed. For example, the lid 53A can be removed when performing maintenance and inspection of the LED ultraviolet light source 51A, and the lid 53B can be removed when replacing or cleaning the photocatalyst beads 52B. It becomes possible by removing it.
[0027]
In order to manufacture the photocatalyst module 50, first, a metal body such as aluminum is extruded with a predetermined length to form a frame body 51. Drilling of the screw holes 51H and 51I is performed. Next, the convex engagement portion 51c of the LED ultraviolet light source 51A is engaged with the groove 51B and housed in the frame body 51. Next, the light transmissive resin body 51C is attached so as to engage with the groove 51D. Next, a net member 52A formed in a separate step is prepared, and is engaged with the groove 51E of the frame body 51 to form a housing. A space for accommodating the photocatalyst beads 52B is formed. Next, the photocatalyst beads 52B are filled in the housing. At this time, it is preferable that the lids 53A and 53B provided on one end surface of the housing are fixed by screws. Next, the other end of the housing portion filled with the photocatalyst beads 52B is sealed with lids 53A and 53B and fixed with screws 54.
[0028]
The required number of the photocatalyst modules 50 assembled in this manner may be used by being connected by the trapezoidal projections 51F and the trapezoidal grooves 51G.
[0029]
FIG. 4 shows a drive circuit of the cleaning device. This drive circuit is housed in the control unit 5A of the cleaning device 1 and has a photodiode 51J connected between the power supply Vcc and the case ground via a resistor 55, and a resistance between the power supply Vcc and the case ground. A switch 56 connected via the switch 55, an ultraviolet LED 51a connected between the power supply Vcc and the case ground via the resistor 55 and the transistor 57, and a transistor 58 connected between the power supply Vcc and the case ground via the transistor 58 A fan motor 59, an OR circuit 60 to which an ON signal based on turning on of a switch 56 is input, a comparator 61 to which a signal corresponding to the light receiving intensity of the photodiode 51J is input, and an AND circuit 62 connected to the comparator 61 , The inverter 63 for inverting the logic of the output of the comparator 61, the switch 56 and the inverter 63 An AND circuit 64 for turning on the transistor 58 in response to the input signal, a pulse generation circuit 65 for generating a pulse for intermittently driving the photodiode 51J, and a control circuit (not shown) for driving the pulse generation circuit 65. The ultraviolet LED 51a, the photodiode 51J, and the comparator 61 form a contamination detection unit that detects the contamination state of the photocatalyst module 50 based on the light transmittance of the photocatalyst beads 52B.
[0030]
This drive circuit inputs an ON signal to the OR circuit 60 and the AND circuit 64 when the operator turns on the switch 56 of the cleaning device 1. In the OR circuit 60, the UV LED 51a is turned on by inputting the Hi signal to the base electrode of the transistor 58. The photodiode 51J inputs a light receiving signal corresponding to the light intensity of the ultraviolet light received through the photocatalytic bead 52B to the comparator 61.
[0031]
The comparator 61 outputs a Lo signal when the level of the light receiving signal is higher than the reference voltage. The inverter 63 logically inverts the Lo signal and inputs the signal to the AND circuit 64 to turn on the transistor 58 and drive the fan motor 59.
[0032]
Further, when contaminants adhere to the photocatalyst beads 52B, the light transmittance is reduced. In such a state, the light receiving signal level of the photodiode 51J decreases, and as a result, the comparator 61 outputs a Hi signal. The inverter 63 logically inverts the Hi signal and inputs it to the AND circuit 64 to turn off the transistor 58 and stop driving the fan motor 59. In this way, it is possible to prevent air from passing through the photocatalyst module 50, prevent undecomposed contaminants from being blown out of the photocatalyst module 50, and continuously irradiate the photocatalyst beads 52B with ultraviolet light to perform the photodecomposition function. Play it.
[0033]
For example, if the switch 56 is turned off for a long time, the photocatalytic beads 52B may have a reduced photodecomposition function even without contaminants attached, and may not exhibit a sufficient purification action immediately after the cleaning device 1 is driven. Therefore, the control circuit outputs a pulse signal from the pulse generation circuit 65 to the OR circuit 60 at a predetermined timing (for example, a lighting time of several times per hour, several seconds) to turn on the transistor 58 and turn on the ultraviolet LED 51a. I do. As a result, the photocatalyst beads 52B are periodically excited. When it is determined that the photocatalyst beads 52B are contaminated, a visual indication may be provided by turning on or blinking a contamination indicator lamp or the like provided on the operation unit 2A.
[0034]
Hereinafter, the operation of the cleaning device according to the first embodiment will be described. In the following description, it is assumed that the photocatalyst beads 52B sufficiently exhibit a photodecomposition function immediately after the operation.
[0035]
When the operator turns on the switch 56 of the cleaning device 1, the drive circuit of the control unit 5 </ b> A is energized and the fan motor 59 built in the exhaust unit 6 is driven. The fan motor 59 sucks air from the suction part 2 into the cleaning device 1 by rotating the fan 6A attached to the rotating shaft.
[0036]
The drive circuit irradiates the ultraviolet rays to the photocatalyst beads 52 </ b> B of the photocatalyst unit 52 by energizing the ultraviolet LED 51 a provided in each photocatalyst module 50 of the photocatalyst module 5.
[0037]
The photocatalyst beads 52B come into contact with air flowing into the photocatalyst section 52 via the mesh member 52A based on the rotation of the fan 6A. At this time, contaminants such as odor components in the air are adsorbed by the voids of the porous composition, and are decomposed based on the decomposition action of the photocatalyst. The clean air to which the contaminants are adsorbed is exhausted to the outside from the outlet grill 6B based on the rotation of the fan 6A.
[0038]
FIG. 5A shows a cleaning device using a photocatalyst module according to the present embodiment, and a cleaning device that uses a black light as a light source and irradiates a filter containing silica gel carrying a photocatalyst with ultraviolet light from outside. 4 shows the deodorizing characteristics of acetaldehyde with respect to acetaldehyde. The front area (effective area) of the filter is almost the same, the wind speed is about 3.0 mm / sec, and the air volume is about 35 m ² / Hr.
[0039]
According to the cleaning device 1 of the present embodiment, it was confirmed that the concentration can be reduced to 0 in about one hour with respect to the acetaldehyde concentration at the start of the measurement. On the other hand, in a cleaning device using a black light, it takes about four times, that is, four hours, until the concentration becomes zero.
[0040]
FIG. 5B shows the deodorizing characteristics when the cleaning device is driven under the same conditions as those described above for hydrogen sulfide.
[0041]
According to the cleaning device 1 of the present embodiment, even in the case of hydrogen sulfide, the time required to reduce the concentration to the same level is reduced by about 30 minutes compared to the cleaning device using the black light, It was confirmed that the photocatalyst beads 52B functioned sufficiently.
[0042]
According to the above-described first embodiment, the following effects can be obtained.
(1) Since the photocatalyst beads 52B are removably accommodated in the photocatalyst portion 52 formed by the frame 51 and the net member 52A, the photocatalyst beads 52B can be easily taken out from the frame 51, and the work such as replacement can be facilitated. Can be done. In addition, it is also possible to increase or decrease the amount of the photocatalyst beads 52B according to the required purification capacity. When the photocatalyst beads 52B deteriorate, only the photocatalyst beads 52B can be replaced, and the other parts can be used continuously. Running costs can be reduced.
(2) Since the LED ultraviolet light source 51A is arranged with a space with respect to the photocatalyst portion 52 by the light transmissive resin body 51C, light reaches the wide area of the photocatalyst beads 52B, and the excitation of the photocatalyst is promoted. Degradability of pollutants can be increased.
(3) Since the frame body 51 is formed by extrusion molding, it can be easily formed in a size corresponding to the required purification ability, and the LED ultraviolet light source 51A and the photocatalyst beads 52B can be appropriately formed in a number corresponding to the purification ability. Can be accommodated.
(4) Since the frame 51 is provided with the trapezoidal projections 51F and the trapezoidal grooves 51G for coupling to the other photocatalyst modules 50, the slide fitting of the concave and convex portions is performed manually without using a tool or the like. A plurality of photocatalyst modules 50 can be combined, and the photocatalyst module 5 according to the purifying ability can be easily formed.
(5) By intermittently driving the LED ultraviolet light source 51A based on the pulse output from the pulse generation circuit 65, it is possible to prevent the photocatalytic function of the photocatalyst beads 52B from deteriorating. Further, since the LED ultraviolet light source 51A does not need to be constantly turned on, an increase in power consumption can be suppressed.
(6) Since the photocatalyst portion 52 and the light source portion are covered with different lids 53A and 53B, when an abnormality occurs in the LED ultraviolet light source 51A, the lid 53A is removed so that the photocatalyst beads 52B do not spill outside. Maintenance inspection work can be easily performed.
[0043]
Further, when exciting the photocatalyst, the driving circuit may pulse-drive the ultraviolet LED 51a with a large current that does not impair the life. In this case, since the intense light is instantaneously emitted from the ultraviolet LED 51a, the light can be spread over the entire photocatalyst bead 52B, and thereby the entire photocatalyst portion 52 can be efficiently excited. For example, by configuring the drive circuit so as to perform light emission control for supplying 100 mA at a duty of 20% to the ultraviolet LED 51a having a rated output of 20 mA, it is possible to light the ultraviolet LED 51a while suppressing an increase in the amount of heat generation of the ultraviolet LED 51a within an allowable range. it can.
[0044]
In the first embodiment described above, the photocatalyst module 5 in which a plurality of photocatalyst modules 50 stacked so as to be perpendicular to the air passage direction are arranged in the width direction has been described. For applications that cannot be performed, the purification ability of the photocatalyst module 5 may be insufficient.
[0045]
FIG. 6 shows a photocatalyst module 5 according to a second embodiment of the present invention. The photocatalyst module 5 has a configuration in which the photocatalyst modules 50 connected in ten layers in the height direction T are connected in five rows in the air passage direction. The illustration of the control unit 5A is omitted in FIG.
[0046]
According to the second embodiment described above, the air passing in the direction of the arrow passes through the five rows of photocatalyst modules 5, so that the adsorbability of pollutants is improved, and even when it is difficult to circulate the air. Excellent purification ability can be provided. The arrangement of the photocatalyst modules 50 can be formed with the number of layers and the number of rows according to the application and the required purification capacity.
[0047]
7 and 8 show a photocatalyst module according to a third embodiment of the present invention. The photocatalyst module 5 has a configuration in which one of the pair of frames 51 of the photocatalyst module 50 described in the first embodiment is provided with a frame 51L having no LED ultraviolet light source 51A. In addition, portions having the same configurations and functions as those of the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.
[0048]
The photocatalyst module 50 can be connected to the LED ultraviolet light source 51A in a facing direction as shown in FIG. 7 by a trapezoidal protrusion 51F and a trapezoidal groove 51G, and as shown in FIG. It is also possible to connect such that the ultraviolet irradiation direction of 51A is the same direction. Note that a reflecting surface that reflects ultraviolet light may be formed inside the frame 51L.
[0049]
According to the above-described third embodiment, in addition to the favorable effects of the first embodiment, the size in the height direction (perpendicular to the paper surface) can be reduced, and the device can be installed in a narrow place. In addition, even one LED ultraviolet light source 51A efficiently irradiates the photocatalyst beads 52B with ultraviolet light.
[0050]
FIG. 9 shows a photocatalyst module according to a fourth embodiment of the present invention. In this photocatalyst module 50, photocatalyst beads 52 </ b> B and a pressure loss reducing member that reduces the pressure loss of the photocatalyst portion 52 are mixed in the photocatalyst portion 52. Other parts having the same configuration and function as those of the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.
[0051]
FIG. 9A shows a configuration in which photocatalyst beads 52B and glass beads 52C made of transparent glass are mixed. The glass beads 52C are formed to have a larger particle size (for example, 3 mm) than the photocatalyst beads 52B. ing. In the third embodiment, the size of the net member 52A in the height direction is increased corresponding to the capacity increased by the addition of the glass beads 52C.
[0052]
FIG. 9B shows a configuration in which photocatalyst beads 52B and glass fibers 52D made of transparent glass are mixed. The glass fibers 52D are optical fibers having a small diameter smaller than the particle diameter of the photocatalyst beads 52B. Is mixed in the photocatalyst beads 52B.
[0053]
According to the above-described fourth embodiment, the pressure loss during the operation of the cleaning device can be reduced without impairing the photocatalytic function of the photocatalyst beads 52B, and ultraviolet light is guided into the photocatalyst section 52 by the pressure loss reducing member. This can prevent the occurrence of uneven excitation of the photocatalyst beads 52B.
[0054]
FIG. 10 shows a photocatalyst module according to a fifth embodiment of the present invention. This photocatalyst module 50 has a sponge-like porous material 52E having a plurality of voids 52F in the photocatalyst portion 52 instead of the photocatalyst beads 52B, and the photocatalyst is mixed in the porous material 52E. Other parts having the same configuration and function as those of the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.
[0055]
According to the fifth embodiment described above, by using the porous material 52E having a photocatalytic function, the pressure loss during the operation of the cleaning device can be reduced, and when the photocatalyst unit 52 is deteriorated, the porous material 52E is removed. Can be easily replaced. When the porous material 52E has sufficient mechanical strength and can support the pair of frames 51, the mesh member 52A may be omitted. As an alternative to the net member 52A, a member such as a frame that can support the pair of frame members 51 and has an opening having excellent air permeability may be used.
[0056]
FIG. 11 shows a cleaning device according to a sixth embodiment of the present invention. This purifying device 1 purifies by filtering and decomposing a contaminant contained in the water W with a photocatalyst. A water tank 7 for storing the water to be purified, a pre-filter unit 3 and a photocatalyst module 5 therein are provided. And a housing 9 for introducing water W through the opening 8A, a pipe 9 connected to the housing 8, and a pump 10 provided in the pipe 9 for circulating the water W. Note that portions having the same configuration and function as those of the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.
[0057]
The photocatalyst module 5 is configured by connecting a plurality of water-resistant photocatalyst modules 50.
[0058]
FIGS. 12A to 12C show a photocatalyst module. The photocatalyst module 50 includes a frame 51 formed by extrusion molding of a resin, and a cylindrical light source protection portion 51M formed of transparent glass and covering the LED ultraviolet light source 51A in a watertight manner as shown in FIG. Have. The light source protection portion 51M may be formed of a light-transmitting resin material having excellent ultraviolet resistance instead of being formed of transparent glass. Further, the frame 51 may be formed of a metal material having excellent heat dissipation.
[0059]
The light source protection part 51M is formed with a space around the LED ultraviolet light source 51A so that light is irradiated to the photocatalyst beads 52B of the photocatalyst part 52 over a wide range, and protrudes in a convex shape toward the photocatalyst part 52. It has a shape.
[0060]
FIG. 12B illustrates a sealing structure of the light source protection unit 51 </ b> M on the side surface of the frame body 51. The frame body 51 exposes a part of the light source protection part 51M at a predetermined length from a side surface, and waterproofly waterproofs the LED ultraviolet light source 51A by engaging a lid 53 covering the side surface in a watertight manner.
[0061]
The lid 53 has an annular groove 53c that engages with the end of the light source protection section 51M, and is attached by applying a sealing agent such as silicon to the groove 53c when fixing to the side surface.
[0062]
FIG. 12C shows a state where the lid 53 is fixed to the frame body 51. The groove 53c seals the end of the light source protection portion 51M in a watertight manner and covers the end surface of the frame body 51 so that the photocatalyst beads 52B of the photocatalyst portion 52 do not spill out.
[0063]
The operation of the cleaning device according to the sixth embodiment will be described below.
[0064]
When the operator turns on the switch 56 of the cleaning device 1, the pump 10 is energized and water is supplied in the direction indicated by the arrow in the pipe 9. Further, water is sucked into the housing 8 from the opening 8A based on the driving of the pump 10. The pre-filter unit 3 separates large-sized dust and dirt in water. The water that has passed through the pre-filter unit 3 flows into the photocatalyst unit 52 of the photocatalyst module 5 based on the water pressure difference. The photocatalyst unit 52 adsorbs contaminants in water on the surface of the photocatalyst beads 52B, adsorbs the contaminants in the voids of the porous composition, and decomposes them based on the decomposition action of the photocatalyst. The clean water to which the contaminants have been adsorbed is returned to the water tank 7 via the pipe 9.
[0065]
According to the above-described sixth embodiment, in addition to the favorable effects of the first embodiment, pollutants in water can be decomposed based on the photocatalytic function. In addition, when used in water, since the heat radiation of the LED is reduced by the water, a resin material having excellent moldability can be used, and the cost is excellent.
[0066]
In each of the above-described embodiments, the configuration using the LED as the light source for irradiating ultraviolet rays has been described. However, another light source may be used as long as heat radiation and space saving can be realized.
[0067]
【The invention's effect】
As described above, according to the photocatalyst module of the present invention and the cleaning device using the same, the photocatalyst unit is required to be arranged with a space between the LED catalyst and the LED ultraviolet light source 51A and to be able to be taken out from the inside of the housing unit. It can flexibly cope with the purifying ability and exhibits excellent adsorptivity and decomposability, and can recover even if the decomposability of the photocatalyst decreases.
[Brief description of the drawings]
FIG. 1 shows a cleaning device using a photocatalyst module according to a first embodiment of the present invention, wherein (a) is an exploded perspective view and (b) is an overall perspective view of the photocatalyst module.
FIG. 2 is a partial perspective view of the photocatalyst module according to the first embodiment.
FIG. 3 is a diagram showing a connected state of the photocatalyst module according to the first embodiment.
FIG. 4 is a circuit diagram showing a drive circuit of the photocatalyst module according to the first embodiment.
FIG. 5A is a diagram illustrating acetaldehyde deodorizing characteristics of the photocatalyst module according to the first embodiment, and FIG. 5B is a diagram illustrating hydrogen sulfide deodorizing characteristics.
FIG. 6 is a partial perspective view of a photocatalyst module according to a second embodiment.
FIG. 7 is a side view of a photocatalyst module according to a third embodiment.
FIG. 8 is a side view showing different connection states of the photocatalyst module according to the third embodiment.
FIGS. 9A and 9B are side views of a photocatalyst module according to a fourth embodiment.
FIG. 10 is a side view of a photocatalyst module according to a fifth embodiment.
FIG. 11 is an overall view of a cleaning device according to a sixth embodiment.
12A is a side view of a photocatalyst module according to a sixth embodiment, FIG. 12B is a plan view showing a state before engagement with a frame and a lid, and FIG. It is a top view showing the state where the body and the lid were engaged.
FIG. 13 is an overall view showing a conventional air cleaning device.
[Explanation of symbols]
1, cleaning device 2, suction unit 2A, operation unit 3, pre-filter unit
4, adsorption filter section 5, photocatalyst module 5A, control section
6, exhaust part 6A, fan 6B, blowout grill 7, water tank
8, housing 8A, opening 9, piping 10, pump
50, photocatalyst module 50A, photocatalyst module
50B, photocatalyst module 50C, photocatalyst module
50D, photocatalyst module 51, frame body 51A, ultraviolet light source
51B, groove 51C, light-transmitting resin body 51D, groove 51E, groove
51F, trapezoidal projection 51G, trapezoidal groove 51H, screw hole
51I, screw hole 51J, photodiode 51L, frame
51M, light source protection unit 51a, ultraviolet LED 51b, reflector
51c, convex engagement part 52A, net member 52B, photocatalytic beads
52C, glass beads 52D, glass fiber 52F, void
52E, porous material 52, photocatalyst part 53, lid 53A, lid
53B, lid 53c, groove 55, resistor 56, switch
57, transistor 58, transistor 59, fan motor
60, OR circuit 61, comparator 62, AND circuit
63, inverter 64, AND circuit 65, pulse generation circuit
70, air purifier 71, container 72, deodorized particles
73, ultraviolet light source 74, fan

Claims (19)

A light source that emits active radiation,
A photocatalyst portion that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photocatalyst module, comprising: a housing that houses the light source and the photocatalyst unit therein and that is provided so as to be able to be taken out of the interior. 2. The photocatalyst module according to claim 1, wherein the casing has a frame having a trapezoidal protrusion and a trapezoidal groove provided on a surface of the trapezoidal protrusion and the trapezoidal groove which can be connected to another casing based on the concave / convex fitting. 3. . The housing section, a net member carrying the photocatalyst on its surface,
The photocatalyst module according to claim 1, further comprising: a frame formed by extrusion molding to sandwich the net member and accommodate the light source in a cross section. The photocatalyst module according to claim 1, wherein the substrate is formed of a spherical silica gel having a light transmitting property. The light source is an LED that emits the active radiation,
The photocatalyst module according to claim 1, further comprising a drive circuit that drives the LED periodically to excite the photocatalyst. The photocatalyst module according to claim 1, wherein the photocatalyst unit includes a pressure loss reducing member that reduces a pressure loss of the gas or the liquid to be passed. The photocatalyst module according to claim 6, wherein the pressure loss reducing member has light transmittance. The photocatalyst module according to claim 1, wherein the light source is water-tightly covered by a light-transmitting light source protection unit. A light source that emits active radiation, a photocatalyst that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photo-catalyst module comprising: a photo-catalyst module; and a contamination detection unit that detects a contamination state of the photo-catalyst based on light transmittance of the photo-catalyst unit. A light source that emits active radiation,
A photocatalyst portion that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photocatalyst module having a housing that accommodates the photocatalyst section and the light source therein and that is capable of being taken out of the interior,
A purifying unit for disposing the photocatalyst module on a path through which the gas or the liquid passes. The cleaning device using a photocatalyst module according to claim 10, wherein the photocatalyst module is formed by connecting a plurality of the photocatalyst modules. The photocatalyst module according to claim 10, wherein the casing has a frame having a trapezoidal protrusion and a trapezoidal groove provided on a surface of the trapezoidal protrusion and the trapezoidal groove that can be connected to another casing based on the concave-convex fitting. Cleaning device using The housing section, a net member carrying the photocatalyst on its surface,
The cleaning device using a photocatalyst module according to claim 10, further comprising: a frame formed based on extrusion molding to sandwich the net member and accommodate the light source in a cross section. The cleaning device according to claim 10, wherein the substrate is formed of a light-transmitting spherical silica gel. The light source is an LED that emits the active radiation,
The cleaning device according to claim 10, further comprising a drive circuit that periodically drives the LED to excite the photocatalyst. The cleaning device using a photocatalyst module according to claim 10, wherein the photocatalyst unit includes a pressure loss reducing member that reduces a pressure loss of the gas or the liquid to be passed. 17. The cleaning device according to claim 16, wherein the pressure loss reducing member has a light transmitting property. The cleaning device using a photocatalyst module according to claim 10, wherein the light source is water-tightly covered by a light-transmitting light source protection unit. A light source that emits active radiation,
A photocatalyst portion that is arranged with a space between the light source while holding a photocatalyst activated by the active radiation on a substrate, and allows a gas or liquid to pass therethrough,
A photocatalyst module having a contamination detection unit that detects a contamination state of the photocatalyst based on the light transmittance of the photocatalyst unit,
A purifying unit for disposing the photocatalyst module on a path through which the gas or the liquid passes.

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