JP7357652B2 - Blower with photocatalyst - Google Patents

Description

The present invention relates to a photocatalyst blower having an air purifying function.

There is a technology that installs a fan on the ceiling or the like to even out the temperature distribution in the room. At that time, there is also a known technique for deodorizing the room by combining a blower and a deodorizer.

The ceiling-mounted blower equipped with a deodorizer described in Patent Document 1 includes an inlet provided on the outer periphery of the upper end, a fan provided in the front central part of the inlet, and an inlet provided in front of the fan so as to surround the fan. When the fan rotates, air is sucked in from the intake port, passes through the deodorizer unit provided on the outside of the fan, and flows downward through the inner outlet passage provided inside the deodorant unit. Air is blown.

Further, Patent Document 2 describes a blower capable of blowing air downward in the forward direction and blowing air upward in the opposite direction. The air sent upward from the blower flows along the ceiling surface, the airflow moves downward along the side walls, flows over the floor, rises in the center of the room, and is guided to the blower opening. It is said that this allows the air on the ceiling surface to be efficiently diffused.

Also, photocatalytic air purifiers are known. In the air cleaner described in Patent Document 3, a light source illuminates a photocatalyst member and sends wind in a direction substantially perpendicular to the direction of the light. Light from a light source illuminates the photocatalyst member through the transparent plate, and airflow is passed through the photocatalyst member by a fan located away from the photocatalyst member.

Utility model registration No. 3152178 Patent No. 6496873 JP 2019-130476 Publication

By combining a photocatalytic method with a ceiling-mounted blower, the inventor of the present invention attempted to realize a photocatalyst-equipped blower that can be used not only for conventional ceiling-mounted blowers but also for its air cleaning effect. In this case, the air blowers shown in Patent Documents 1 and 2 are ceiling-mounted type and have an axially symmetrical basic structure, whereas the air cleaner shown in Patent Document 3 is a floor-standing type. However, since they have a flat structure, they cannot be simply combined. Therefore, an object of the present invention is to realize a photocatalytic blower that can be installed in a high place such as a ceiling, taking into account the usage situation.

In such a ceiling-mounted photocatalytic air blower, it is more difficult to replace and clean the photocatalyst filter than in a floor-mounted photocatalytic air purifier. Therefore, the next object of the present invention is to realize a photocatalyst-equipped air blower that can be relatively easily maintained, such as replacing and cleaning the photocatalyst filter, even if it is installed in a high place such as a ceiling.

A further object of the present invention is to utilize the functions of a photocatalyst-equipped air blower, unlike a simple air blower, to realize an operation that cleans the lower part of the room and the ceiling surface depending on the time of use.

The present invention provides a fan that blows air downward or upward, a wind direction adjustment base provided above the fan, a plurality of photocatalyst filters provided beside the wind direction adjustment base to allow airflow to pass through, and the photocatalyst filter. A unit with a photocatalyst filter including an exciting light source and the plurality of photocatalyst filters and a lower cover, the wind direction adjustment base has a side surface that is inclined so that airflow passes through the fan and the photocatalyst filter, The unit with a photocatalyst filter is a photocatalyst-equipped blower that can be removed and attached to the photocatalyst-equipped blower as an integral unit .

The present invention provides a fan that blows air downward or upward, a wind direction adjustment base provided above the fan, a plurality of photocatalyst filters provided beside the wind direction adjustment base to allow airflow to pass through, and the photocatalyst filter. and a light source for excitation, and the wind direction adjustment base has inclined sides so that the airflow passes through the fan and the photocatalyst filter, and adjusts the air flow rate to two levels, strong or weak, or strong and weak. The photocatalyst-equipped blower is capable of performing multi-step control between the two, and stops the light source when the air volume is high, and drives the light source when the air volume is low. .

In the present invention, the unit with a photocatalyst filter may include the button for removing and attaching the photocatalyst filter.

In the present invention, the light source may be provided at a position closer to the wind direction adjustment base than the photocatalyst filter.

In the present invention, the photocatalyst-equipped blower includes a lower ventilation port and a side ventilation port, and has a downward ventilation mode in which downward air is sent from the lower ventilation port, and a lateral ventilation mode in which sideways air is sent from the lateral ventilation port. may be switchable.

In the present invention, the photocatalytic blower may be capable of switching between downward air blowing and sideways air blowing according to a programmed schedule.

In the present invention, the photocatalyst-equipped blower may include a horizontal ventilation port next to the wind direction adjustment base, and fins for rectifying airflow may be provided between the photocatalyst filter and the horizontal ventilation port.

By combining a photocatalytic method with a ceiling-mounted blower according to the present invention, it is possible to realize a photocatalyst-equipped blower that can be used not only for conventional ceiling-mounted blowers but also for its air cleaning effect.

According to the present invention, it is possible to realize a photocatalyst-equipped air blower that allows maintenance such as replacement and cleaning of the photocatalyst filter to be performed relatively easily even when installed in a high place such as a ceiling.

In the present invention, by utilizing the function of the photocatalytic blower, it is possible to realize the operation of cleaning the lower part of the room and the ceiling surface depending on the time of use.

Front schematic sectional view of the photocatalyst-equipped blower of Embodiment 1 A schematic cross-sectional plan view of the photocatalyst-equipped blower of Embodiment 1 Schematic diagram of the photocatalytic filter of Embodiment 1 Explanatory diagram of the attachment/detachment mechanism of Embodiment 1 Explanatory diagram for explaining the indoor air blowing state using the photocatalyst blower of Embodiment 1 Explanatory diagram for explaining the state of air being blown toward the indoor ceiling using the photocatalyst-equipped air blower of Embodiment 1 Explanatory diagram of an example of switching the operation mode of the photocatalytic blower according to Embodiment 1 Schematic cross-sectional diagram of a photocatalyst blower according to Embodiment 2 Explanatory diagram for explaining the indoor downward air blowing state using the photocatalyst-equipped air blower of Embodiment 2 Explanatory diagram of an example of switching the operation mode of the photocatalyst-equipped blower according to Embodiment 2 Schematic cross-sectional diagram of a photocatalyst blower according to Embodiment 3 Explanatory perspective view of a photocatalyst-equipped blower according to Embodiment 3

<Embodiment 1>
<Configuration>
The photocatalytic blower 100 of this embodiment can be installed directly on the ceiling or semi-embedded in the ceiling, and can switch between a function of blowing air horizontally along the ceiling surface (lower surface of the ceiling) and a function of blowing air downward. It is possible.

FIG. 1 is a schematic front sectional view of the photocatalyst-equipped blower 100 taken along the line BB' in FIG. 2, and FIG. 2 is a schematic sectional view taken along the line CC' in FIG. 1. In order to explain the characteristic parts, mechanical parts that make the drawings complicated are omitted as appropriate. In the following explanation, the terms "top" and "bottom" will be used with reference to the axis A of the fan in Fig. 1, and the directions orthogonal to the top and bottom will be used as "left" and "right" when specifying the horizontal direction, especially the left and right sides of the horizontal direction. So, "up and down" does not necessarily correspond to the up and down direction based on gravity.

The photocatalytic blower 100 includes a lower ventilation opening 110, a lower cover 112, a fan 120 having blades 121, a wind direction adjustment base 130, a back plate 135, an LED board 140, a photocatalyst filter 150, an upper cover 160, a button part 171, and a locking part. 175, a side ventilation opening 180, and a fin 182. A power source 162 is provided between the top cover 160 and the back plate 135. When the photocatalytic blower 100 is embedded in the ceiling 190, the portion above the back plate 135 is fixedly installed in a circular hole provided in the ceiling 190. When the blower with photocatalyst 100 is directly attached to the ceiling, the upper surface of the upper cover 160 is attached directly to the ceiling 190.

A lateral ventilation hole 180 is provided on the lower side of the back plate 135 so as to surround the central axis A.

<Wind direction adjustment base>
The wind direction adjustment base 130 is a member that is axially symmetrical with respect to the axis A, and has a cross-sectional shape that slopes so that the side surface portion 130S becomes closer to the central axis A as it goes lower. As a result, the airflow H1 taken in from the side ventilation opening is changed downward and released as airflow V1 from the lower ventilation opening 110, or the airflow V2 taken in from the lower ventilation opening 110 is changed sideways and released as airflow H2 from the side ventilation opening. It has the effect of

<Photocatalyst filter>
In this embodiment, a "wind direction adjustment base 130" is provided above the fan to convert vertical wind from the fan into horizontal wind, and a "photocatalyst filter 150" is installed to surround the "wind direction adjustment base 130". installed so that horizontal wind passes through the photocatalyst filter.

A schematic diagram of the photocatalyst filter 150 is shown in FIG. The photocatalyst filter 150 is made of titanium oxide as a main component, and is, for example, a rectangular parallelepiped with a width W = 90 mm, a height H = 30 mm, and a thickness T = 10 mm, and has many square holes 150H of about 5 mm (for example, 100 holes) for passing airflow. ) 4 open ones are used.

<Detachment mechanism for units with photocatalyst filters, etc.>
Since dust accumulates in the photocatalyst filter 150 as it is used, it is preferable that it can be removed for maintenance. However, in this embodiment, the photocatalyst filter 150 is installed above the photocatalyst-equipped blower 100, which is difficult to remove. Furthermore, since there are a plurality of photocatalyst filters 150 (four in this case), simply thinking, after removing the lower cover 112, each of the four photocatalyst filters 150 is removed, maintenance is performed, and then the four photocatalyst filters 150 are installed. , the lower cover 112 must be attached, which is a complicated work.

Therefore, as shown in FIG. 4(a), which is a sectional view of the left half of the attachment/detachment mechanism taken along the line DD' in FIG. 150 is fixed to the upper surface of the lower cover 112 provided on the outside of the fan 120, and the entire unit including the button component 171 is integrated as a photocatalyst filter equipped unit 150G. The unit 150G with a photocatalyst filter can be detached and attached integrally by the attachment/detachment mechanism 170. Fins 182 may be included in the photocatalyst filter unit 150G. In addition, since the locking part 175 is a member that cannot be removed as an integral part, it is not included in the photocatalyst filter unit 150G.

The attachment/detachment mechanism 170 includes a button part 171, a locking part 175, and other parts that support these parts. As shown in FIG. 4(b), the button component 171 includes a button 171B, a spring portion 171S, a hole portion 171H, and a support portion 171K. The locking component 175 includes a tip portion 175T having an oblique tip and a spring portion 175S.

Two buttons 171B are provided diagonally on the side surface of the lower cover 112. If you support the lower cover 112 with both hands and press the two buttons 171B inward with your fingers, the entire button part 171 will move inward and the support part 171K and tip part 175T will be disengaged, so the entire unit with photocatalyst filter 150G can be lowered and removed from other parts.

After maintenance of the photocatalyst filter 150, when the unit with photocatalyst filter 150G is pressed from below, the tip 175K and the support portion 171K will come into contact, but since the tip 175K of the spring portion 175S is slanted, the tip will be pushed back by elasticity. The portion 175K passes through the hole portion 171H, and the photocatalyst filter unit 150G is attached.

Further, to prevent the unit from falling, the lower cover 112 of the photocatalyst filter unit 150G is fastened to the fan 120 by a fall prevention wire 113 shown in FIG. Therefore, even if the lower cover 112 is removed by mistake, the photocatalyst filter-equipped unit 150G will not fall to the floor. By removing the fall prevention wire 113 from the connecting hook 123 connected to the fan 120, the photocatalyst filter equipped unit 150G can be removed.

<Fin>
The fins 182 shown in FIG. 1 have the effect of rectifying the airflow, and are useful when blowing air along the ceiling, especially in the mode of blowing air toward the ceiling. This has the effect of increasing the radius r. The direction of the fins 182 may be fixed, or may be variable such that it becomes diagonally upward or downward toward the outside.

<LED board and light source>
An LED board 140 on which a light source 141 for photocatalyst irradiation is arranged is provided on the "wind direction adjustment base 130" side, and the photocatalyst filter 150 is irradiated with excitation light. The LED board 140 is held by a pillar 145 shown in FIG. Since the light source 141 is provided on the central axis A side, the wiring from the power source 162 to the light source 141 can be shortened. As the light source 141, for example, a surface-mounted GaN (gallium nitride)-based LED with a wavelength of 405 nm can be used.

By setting the vertical width of the "LED board 140" to, for example, about 1/4 of the vertical width of the horizontal ventilation hole 180, it is difficult to obstruct the airflow, and the airflow cools the LED board 140, thereby increasing the light source 141. Luminous efficiency can be improved.

<Power source>
On the back plate 135, there is provided a power supply 162 with two outputs, one for driving the fan 120 and one for driving the light source 141, and a wireless communication module 163 that is removably installed in a slot of the power supply 162, and the power supply 162 is a control device. The two outputs can be controlled independently according to the wireless control signal from 195. Note that the polarity of the output for the fan 120 can be reversed so that forward/reverse rotation of the fan can be controlled. The fan 120 is a DC motor whose rotation direction can be switched between forward and reverse rotation. Such operation switching is performed by reversing the output of the power supply 162 under the control of the control device 195. Further, the air volume can be controlled in two levels, for example strong and weak, or in more detailed levels.

<Use>
<Operating mode>
The photocatalyst-equipped blower 100 can operate in three levels: weak, medium, and strong, the photocatalyst in two ways, OFF and ON, and two directions, downward and sideways, in 12 combinations.

However, if there are as many as 12 modes, the user would have trouble deciding which mode to select during use, so during normal use, the modes are limited as follows.

Low airflow: Photocatalyst is ON. Wind direction can be sideways or downward.Medium/strong air volume: Photocatalyst is OFF. Wind direction can be sideways or downward.

The reason why photocatalyst ON is limited to low airflow is that the airflow that has the photocatalytic effect is diluted in strong winds, but future improvements to the photocatalyst filter and excitation light source will make it practical to turn on photocatalyst at high airflow. It is also possible to make it into something.

By wirelessly controlling such complicated control operations, there is no need to install wired signal lines, and it is possible to reduce the construction schedule and construction cost.

In addition, it is now possible to control the operation of multiple blowers, and it is also possible to change the operating mode and schedule after installation.

<Downward air blow>
FIG. 5 is an explanatory diagram for explaining the air blowing state in a room where the photocatalytic blower 100 is installed. An example of an installation location is a supermarket equipped with refrigeration and freezing equipment.

In ordinary homes and offices, cold air tends to accumulate near the floor, but this tendency becomes more pronounced in supermarkets equipped with refrigerators and freezers 197 and 198, where cold air C accumulates on the aisle floor 196. Therefore, during times when people are staying, such as during supermarket business hours, the photocatalytic blower 100 installed on the ceiling 190 is set to downward blow mode to blow warm air W near the ceiling downward into the room, thereby increasing the indoor temperature. This makes it possible to improve heating and cooling efficiency and comfort.

<Blowing air to the ceiling>
FIG. 6 is an explanatory diagram for explaining the state of air being blown toward the indoor ceiling using the photocatalyst-equipped air blower 100. By setting the photocatalytic blower 100 in the horizontal blowing mode and causing the airflow H2 to flow along the ceiling 190, it is possible to prevent dew condensation on the ceiling surface and obtain an anti-mold effect.

The photocatalyst-equipped blower 100 takes in airflow from the lower ventilation opening 110, and the airflow that has passed through the photocatalyst filter 150 inside is blown out from the side ventilation opening 180 in the entire circumferential direction as an airflow H2, and flows along the ceiling 190. The wind speed is 1 m/s or more within a radius r of 2 m or less, and an antifungal effect can be obtained within a 2 m radius.

By installing such photocatalyst-equipped air blowers 100 at intervals of, for example, 4 m, it is possible to send air to the entire ceiling surface.

<Anti-mold effect>
It is known that simply blowing air toward the ceiling or downwards can have an anti-mold effect by preventing condensation, but compared to simple air blowing, the air blowing of this device using a photocatalyst filter has an increased anti-mold effect. I checked to see if there was one as follows.

Two photocatalytic blowers 100 were each placed upside down on a desk.

One photocatalyst blower 100 turned on the light source, the other one did not turn on the light source, placed bread 2 meters away, blew air, and checked the number of days until mold grew on the bread.

In an experiment conducted in October 2020 (in one measurement example, the room temperature was 25 degrees Celsius and the humidity was about 50%, but the temperature and humidity were not constantly controlled), the photocatalyst filter was left without light irradiation for 8 days. The results showed that mold appeared on the 10th day when the photocatalyst filter was irradiated with light.

Through the above simple experiment, it was confirmed that there is a certain degree of antifungal effect. In reality, mold spores are heavy, so in this experiment it is thought that mold spores are not only carried by the air blown from the photocatalytic blower 100, but also fall from above. When installed on the ceiling, mold spores do not fall from above, so it is assumed that the mold prevention effect will be higher.

<Antiviral effect>
This is an air purifier that has a similar configuration to the photocatalyst blower 100 and uses a photocatalyst filter using titanium oxide and a light source with a wavelength of 405 nm to aerosolized virus (SARS-CoV-2) in a 120 liter closed chamber. After spraying and operating for 20 minutes, the virus infection titer was below the detection limit. In reality, in addition to differences in equipment, the volume of indoor air is considerably larger than 120 liters, so it is difficult to say definitively, but in principle, photocatalysts are thought to have an antiviral effect, and for example, It is thought that sending purified air in spots may help prevent virus infections.

<Other effects>
According to the photocatalytic filter manufacturer's description, in addition to inactivating viruses, it also has deodorizing and bactericidal (sterilizing) effects by decomposing organic substances.

<Operation control>
The downward ventilation mode and the horizontal ventilation mode toward the ceiling surface may be switched depending on the time when people are present or when people are not present.

For example, in the example shown in Figures 7(a) and (b) where the present photocatalyst-equipped blower is installed in a supermarket, the mode is "downward air blowing (high air volume)" as shown in Figure 7(a) while the store is open on summer business days. As shown in Figure 7(b), when the store is open on business days in winter, the mode is "sideways ventilation (high air volume)", and when the store is closed in summer and winter, and on non-business days, it is in "sideways ventilation (low air volume)/photocatalyst" mode. By programming the schedule into a control device such as a smart phone, it is possible to maintain cooling and heating efficiency during the opening period due to the indoor circulation effect caused by strong winds, and to obtain a mold-proofing effect on the ceiling surface through the photocatalytic effect when the store is closed and on non-business days. be able to. During openings in the winter, the emphasis is on preventing condensation on the ceiling, and the air is blown horizontally (high air volume), but during openings in the summer, air is blown downwards (high air volume) to prevent areas near the floor from getting too cold. In this way, the operating mode may be adjusted as appropriate depending on the temperature, store opening/closing, and other conditions.

Even in a normal office, air is sent downward during office hours, and air is sent along the ceiling surface outside of office hours, which equalizes the room temperature, improves worker comfort and saves energy. The surface can be mold-proofed.

Such operation switching can be performed by separately installing a control device 195 (not shown) and transmitting a wireless, optical, or wired control signal emitted from the control device 195 to each photocatalyst blower 100. . The control device 195 can be controlled to perform "operations during periods when no one is present" throughout the day on holidays, in addition to controlling the operation according to the time of day, according to a scheduled program.

As the control device, a personal computer, tablet, smart phone, dedicated terminal, etc. can be used.

<Embodiment 2>
<Configuration>
The photocatalytic blower 200 according to the present embodiment is of a type that is connected to a wiring duct 292 for lighting, and the installation position can be freely changed along the wiring duct, so that it can blow air to any location. . Furthermore, since the direction of the wind can be changed not only directly downward but also diagonally, it is particularly suitable for use in blowing air having a sterilizing effect to a specific location. FIG. 8 is a schematic cross-sectional view of the photocatalyst-equipped blower 200 according to this embodiment.

The photocatalyst-equipped blower 200 includes a lower ventilation opening 210, a lower cover 212, a fan 220, a wind direction adjustment base 230 with a side surface 230S, a back plate 235, an LED board 240, a photocatalyst filter 250, an upper cover 260, an arm 275, and a side ventilation opening. 280 and fins 282. A power source 262 is provided between the upper cover 260 and the back plate 235, a horizontal joint portion 276 connected to an arm 275 is provided on the side surface of the upper cover 260, and an upper joint portion 277 provided on the arm 275 is connected to the ceiling. It is attached to a wiring duct 292 provided at 290.

The photocatalyst-equipped blower 200 is attached and fixed to the wiring duct 292, and power is supplied from the wiring duct 292 to the power source 262 through the wiring 278. The direction of the photocatalyst blower 200 can be changed by the horizontal joint part 276.

In FIG. 8, the reason why the fins 282 are directed upward on the outside is to have the effect of preventing light leaking to the outside from the LED 241, but a light shielding plate may be installed separately from the fins 282.

Power supply 262 has two outputs, one for fan 220 and one for driving light source 241. The power supply 262 has a slot and includes a wireless communication module 263 that is removably attached to the slot, and the wireless communication module 263 controls two outputs of the power supply 262 based on a control signal from the outside.

A lateral ventilation hole 280 is provided so as to surround the central axis A. The airflow H taken in from the side ventilation opening 280 passes through the photocatalyst filter 250, becomes a downward airflow at the wind direction adjustment base 230, passes through the fan 220, and is blown as a downward airflow V from the lower ventilation opening 210.

Note that the light source 241 emits light outward (outward from the central axis A), and there is light that goes outward from the photocatalyst filter 250, and the direction of the blower with photocatalyst 200 may be changed and the light may reach a person. , a light shielding plate may be provided.

<Use>
<Diagonally downward air blow>
FIG. 9 is an explanatory diagram for explaining a state in which air is blown downward indoors using the photocatalyst-equipped air blower 200. The direction of the photocatalytic blower 200 is variable, and the air can be directed to the desired location. As an example of a place where this blower can be used, it is assumed that among supermarkets equipped with refrigeration and freezing equipment, it is used in particularly crowded places, such as above the checkout line, for sterilization and anti-virus purposes. It is also envisioned that the system could be used to prevent mold by blowing air directly onto fresh foods that are prone to mold, such as fruit. Since the air is blown from the upper side, where warm air accumulates, to the lower side, where cool air accumulates, it is possible to save energy and improve comfort by equalizing the indoor temperature.

<Operation control>
It is best to blow downward air when people are present, and stop or reduce it when people are not present.

For example, in a supermarket, by turning off the airflow when the store is closed and setting the air volume to "low" and the photocatalyst on when the store is open, it is possible to maintain air conditioning efficiency while the store is open, while also providing an anti-virus effect for those around residents. An example of such operation is shown in FIG.

Such operation switching can be accomplished by separately installing a control device 295 (not shown) in which a schedule is programmed, and transmitting a wireless, optical, or wired control signal emitted from the control device 295 to each photocatalyst blower 200. This can be done by In addition to controlling the operation according to the time of day, the control device 295 can, for example, blow air for indoor cleaning and mold prevention purposes by turning it on ``always or sometimes even when the store is closed,'' or ``operating during periods when no one is present'' all day long on holidays. You can control what you do.
<Embodiment 3>
<Configuration>
The photocatalytic blower 300 according to this embodiment is of a type that is embedded in the ceiling, and is intended for use in blowing air only in a downward direction.

FIG. 11 is a schematic cross-sectional view of a photocatalyst-equipped blower 300 according to the present embodiment, and FIG. 12 is a perspective view of the ceiling cut away for explanation.

The photocatalyst-equipped blower 300 includes a lower ventilation opening 310, a lower cover 312, a fan 320 having blades 321, a wind direction adjustment base 330 having a side surface 330S, a back plate 335, an LED board 340, a photocatalyst filter 350, an upper cover 360, and an outer cover. 365, an internal lateral ventilation opening 380, an airway 385, a second lower ventilation opening 386, a mounting frame 387, and a spring 388. A light source 341 is mounted on the LED board 340, and a power source 362 with two outputs, one for the fan 320 and one for driving the light source 341, is provided between the upper cover 360 and the back plate 335. It is fixedly installed in a circular hole provided in a ceiling 390 by a mounting frame 387 and a spring 388.

Power supply 362 has two outputs, one for fan 320 and one for driving light source 341. The power supply 362 has a slot and includes a wireless communication module 363 that is removably installed in the slot. control two outputs.

<Intake and exhaust mechanism>
In the photocatalyst-equipped blower 300, both the lower ventilation port 310, which is the ventilation port for the airflow V, and the second lower ventilation port 386, which is the intake port for the airflow U, are provided on the bottom surface. 386 is provided so as to surround the lower ventilation opening 310. In order to provide a second lower ventilation port 386 on the lower surface that is connected to the internal horizontal ventilation port 380, an airway 385 is provided as a gap between the two cylinders.

<How to use>
Since the photocatalytic blower 300 cannot blow air along the ceiling surface, it is used only for blowing air downward, and the photocatalyst is turned on as appropriate to circulate normal air that has a sterilizing and antiviral effect into the room, increasing heating and cooling efficiency. I can do it. When it is desired to make the ceiling surface clear, it can be suitably used because it does not protrude from the ceiling surface.

<Modified example>
The embodiments of the photocatalyst-equipped blower according to the present invention have been described above, but the illustrated photocatalyst-equipped blower can be modified as follows, and the present invention can be applied to the photocatalyst-equipped blower as shown in the above-mentioned embodiments. Of course, it is not limited to a blower.

(1) In this specification, ventilation ports include "intake ports, exhaust ports, or intake/exhaust ports." In other words, a "ventilation port" is a structural opening, and includes an opening that has only one of the functions of an "intake port" and an "exhaust port" when the fan used in combination cannot be rotated in forward and reverse directions.

(2) As in Embodiment 3, even if the structure is guided from the internal side ventilation port to another ventilation port leading to the outside through an airway, it is still a structure with a "side ventilation port." Similarly, the lower ventilation opening may be further led to another ventilation opening leading to the outside by an airway.

(3) In addition to titanium oxide, the main material of the photocatalyst filter may be zinc oxide, tungsten trioxide, or the like. By adding appropriate additives to the main material, properties as a photocatalyst can be controlled, such as changing the light absorption wavelength.

(4) The photocatalytic filter is a combination of four rectangular photocatalytic filters as shown in Fig. 2, but in Embodiment 1 etc., it is originally made into a circumferential shape to match the shape of the side ventilation opening. This is desirable. However, since it is difficult to manufacture a photocatalytic filter with such a shape, it is practical to combine divided rectangular photocatalytic filters. The number is not particularly limited, such as 3, 6, 8, etc.

(5) Although the holes provided in the photocatalyst filter have square surfaces, they may have other shapes such as hexagons.

(6) As a light source, a GaN-based LED is used, for example, with a wavelength of 405 nm, but it is preferable to select the wavelength of the light source according to the wavelength sensitivity of the photocatalyst. For example, it is preferable to use a light source with a wavelength of 254 nm to 460 nm. preferable. Among them, GaN-based ultraviolet/violet LEDs in the near-ultraviolet region, for example, wavelengths of 360 nm to 420 nm, have relatively high luminous efficiency (mW of light/mW of input power), and wavelengths at which general titanium oxide photocatalysts have high efficiency. Therefore, it is preferable.

(7) As for the installation position of the light source, although we have shown an example where it is installed between the photocatalyst filter and the wind direction adjustment base, it is also possible to install it on the back plate side and activate the photocatalyst filter by irradiating light diagonally downward. good. In that case, since no light source is installed in the airflow path, the resistance to the airflow becomes smaller.

(8) The lower ventilation opening and the horizontal ventilation opening are the inlets and exits of airflow, but ventilation openings that are not in direct contact with the outside, such as the "internal horizontal ventilation opening" in Embodiment 3, are also referred to as ventilation openings. .

Note that the above-described embodiments disclosed herein are illustrative in all respects, and are not the basis for a limited interpretation. Therefore, the technical scope of the present invention should not be interpreted only by the above-described embodiments, but should be defined based on the claims. In addition, all changes within the meaning and scope of the claims are included.

100, 200, 300 Photocatalyst blower 110, 210, 310 Lower ventilation port 112, 212, 312 Lower cover 120, 220, 320 Fan 130, 230, 330 Wind direction adjustment base 130S, 330S Side part 140, 240, 340 LED board 141 , 241, 341 Light source 150, 250, 350 Photocatalyst filter 150G Unit with photocatalyst filter 150H Hole 162, 262, 362 Power supply 163, 263, 363 Wireless communication module 180, 280 Side ventilation opening 182, 282 Fin 190, 290, 390 Ceiling 195 , 195, 395 Control device 196 Passage floor 197, 198 Refrigeration/freezing device 275 Arm 276 Lateral joint 277 Upper joint 278 Wiring 292 Wiring duct 380 Internal lateral ventilation opening 385 Airway 386 Second lower ventilation opening 387 Mounting frame 388 Spring

Claims (7)

A blower with a photocatalyst,
A fan that blows air downward or upward;
a wind direction adjustment base provided above the fan;
a plurality of photocatalyst filters that are provided next to the wind direction adjustment base and allow airflow to pass through;
a light source that excites the photocatalytic filter;
A unit with a photocatalyst filter including the plurality of photocatalyst filters and a lower cover;
Equipped with
The wind direction adjustment base has an inclined side surface so that airflow passes through the fan and the photocatalyst filter,
The unit with a photocatalyst filter can be removed and attached to the blower with a photocatalyst as an integral unit.
Blower with photocatalyst. A fan that blows air downward or upward;
a wind direction adjustment base provided above the fan ;
a plurality of photocatalyst filters that are provided next to the wind direction adjustment base and allow airflow to pass through;
a light source that excites the photocatalytic filter;
Equipped with
The wind direction adjustment base has an inclined side surface so that airflow passes through the fan and the photocatalyst filter,
It is possible to control the air flow rate in two stages of strong and weak, or in multiple stages between strong and weak ,
stopping the light source when the air volume is strong ;
driving the light source when the air volume is low ;
Blower with photocatalyst. The blower with a photocatalyst according to claim 1 , wherein the unit with a photocatalyst filter includes a button for removing and attaching the filter. The light source is provided at a position closer to the wind direction adjustment base than the photocatalyst filter,
The blower with photocatalyst according to claim 1 or 2. The photocatalyst-equipped blower includes a lower ventilation port and a side ventilation port,
It is possible to switch between a downward ventilation mode in which downward air is blown from the lower ventilation opening and a lateral ventilation mode in which lateral air is blown from the side ventilation opening.
The blower with photocatalyst according to any one of claims 1 to 4. The photocatalytic blower can switch between downward air blowing and sideways air blowing according to a programmed schedule.
The blower with photocatalyst according to claim 5. The photocatalyst-equipped blower includes a side ventilation port next to the wind direction adjustment base,
Fins for rectifying airflow are provided between the photocatalyst filter and the side ventilation opening.
The blower with photocatalyst according to any one of claims 1 to 5.