JP2008128581A - Air curtain apparatus with photocatalyst dispersing function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air curtain apparatus capable of purifying a whole of indoor air by a photocatalyst without enlarging the apparatus. <P>SOLUTION: A photocatalyst dispersing device 2 dispersing photocatalytic particle containing liquid toward an air flow blown out of an air blow-out opening 8 is attached to a casing 1 of the air curtain apparatus including a blow fan 3. In the photocatalyst dispersing device 2, a dispersing handle connected to a housing vessel of the photocatalytic particle containing liquid is intermittently driven by a motor to disperse the photocatalytic particle containing liquid. It is preferable that a photocatalytic particle with apatite attached to a surface of titanium dioxide is used as the photocatalyst. A whole room can be deodorized/purified. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air curtain device with a photocatalyst spraying function in which a photocatalyst spraying function is added to an air curtain device installed at an entrance of a building or the like.

  Air curtain devices are installed at the entrances and exits of homes, offices, shops, factories, etc. to form air curtains, which shut off outside air and room air when the door is opened and closed, and block dust from entering the room and blocking cold air. Etc. This apparatus has a structure in which an air intake port and an air discharge port are formed in a housing in which a blower fan for forming an air curtain is built.

  Since the conventional air curtain device sucks indoor air and discharges it into the room again, it usually has no air purification function. However, according to the recent improvement in environmental awareness, as described in Patent Document 1, it is proposed to purify indoor air by utilizing the oxidative decomposition ability of a photocatalyst by combining an air curtain device and a photocatalyst. ing.

  In Patent Document 1, an air curtain device is installed in a cooking corner or a smoking corner that generates odors to block the indoor space, and a cleaning device coated with a photocatalyst in the vicinity of the air curtain device and an ultraviolet lamp are provided. A method of installing and decomposing odors is disclosed. However, the photocatalyst is fixed on the surface of the cleaning device, and the oxidative decomposition ability of the photocatalyst is exerted only on the air in contact with the photocatalyst. The effect of purifying the whole room air was not obtained.

  In addition, as shown in Patent Document 2, an air curtain is formed at the opening of the refrigerator, and a photocatalyst and an ultraviolet lamp are installed in the internal cold air circulation path to kill bacteria that have entered the refrigerator or to have a bad odor. A method of disassembling is also proposed. However, this method is a method for purifying a small amount of air in a sealed refrigerator, and could not be applied to an air curtain device installed at the entrance of a home, office, store, factory, or the like.

Thus, the idea of performing air purification by combining an air curtain device and a photocatalyst is known. However, the conventionally proposed method requires unrealistic means such as fixing the photocatalyst to the entire wall surface in order to purify the whole room air, and cannot be widely used in ordinary homes. In addition, the installation of an ultraviolet lamp in the room is also a health concern, which has been an obstacle to popularization in ordinary homes.
JP 2004-188105 A JP 2002-257461 A

  An object of the present invention is to solve the above-described conventional problems and to provide an air curtain device that can purify the whole indoor air with a photocatalyst without increasing the size of the device.

  The present invention made to solve the above problems is a photocatalyst spraying method in which a photocatalyst fine particle-containing liquid is sprayed toward a flow of air discharged from an air discharge port of a housing incorporating a blower fan for forming an air curtain. A device is attached.

  The photocatalyst fine particle-containing liquid is preferably a dispersion of photocatalyst fine particles in which apatite is attached to the surface of titanium dioxide, and the photocatalyst spraying device attaches the handle for spraying connected to the storage container for the photocatalyst fine particle-containing liquid to the motor. It is preferable that a mechanism for intermittent driving is provided. Moreover, it is preferable that the blower fan and the photocatalyst spraying device have a structure including a control device that is driven in conjunction with a door opening / closing sensor or a human sensor.

  Since the air curtain device with a photocatalyst spraying function of the present invention sprays the photocatalyst fine particle-containing liquid toward the air flow discharged from the air discharge port, the photocatalyst fine particles can be sprayed over a wide range in the room. Moreover, if the photocatalyst fine particles are in the order of nanomicron, it takes a long time to fall on the floor surface, and it exerts a purification function by contacting with a large amount of indoor air. For this reason, unlike the conventional fixed type photocatalyst, it is not necessary to enlarge the apparatus itself, and it is only necessary to add the photocatalyst spraying apparatus to the existing air curtain apparatus.

  In addition, if a photocatalyst fine particle having apatite attached to the surface of titanium dioxide is used as in claim 2, the apatite adsorbs bacteria and harmful chemical substances and is fixed on the surface of titanium dioxide, so that a more excellent purification effect can be obtained. Obtainable. Further, since the photocatalyst fine particles can exhibit a catalytic effect even by room light, it is not necessary to install an ultraviolet lamp.

Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 is a perspective view showing an example of an air curtain device with a photocatalyst spraying function of the present invention, and FIG. 2 is a vertical sectional view thereof. In these drawings, reference numeral 1 is a housing of an air curtain device, and 2 is a photocatalyst spraying device attached to the lower part thereof. Inside the housing 1, a blower fan 3 for forming an air curtain, a motor 4 for driving the air curtain, a control device 5 using a microcomputer and the like, a stabilizing power supply device 6, and the like are incorporated. An air intake port 7 is formed on the front surface of the housing 1, and a slit-like air discharge port 8 is formed on the lower surface of the housing 1 to form an air curtain downward. As the blower fan 3, for example, a sirocco fan can be used, and the drive motor 4 can be rotated forward and backward, and the rotation speed can be switched between high speed and low speed.

  3 to 6 are diagrams showing the internal structure of the photocatalyst spraying device 2, wherein 9 is a container for storing the photocatalyst fine particle-containing liquid, and 10 is a spraying handle connected to the mouth. As shown in FIG. 5, the storage container 9 is a cassette-type container that is fitted into and fixed to a fixed base 11. Further, an eccentric cam 13 driven by a motor 12 is provided on the inner side wall of the photocatalyst spraying device 2, and as shown in FIG. 6, an arm 14 that moves left and right within a horizontal plane when the eccentric cam 13 rotates. The tip of is located outside the handle 10 for spraying.

  Therefore, when the eccentric cam 13 is rotated, the arm 14 moves to the left and right as shown in FIG. 6, and the spraying handle 10 of the storage container 9 is intermittently moved to discharge the liquid containing the photocatalyst fine particles inside the storage container 9. Spray from the outlet 15. The spraying handle 10 can be provided with a roller or the like for reducing contact resistance with the arm 14. As shown in FIG. 2, since the discharge port 15 of the photocatalyst spraying device 2 is located immediately below the air discharge port 8 formed on the lower surface of the housing 1, the sprayed photocatalyst fine particle-containing liquid is It is scattered throughout the room on the airflow of the air curtain.

  Thus, unlike the conventional product, the air curtain device with a photocatalyst spraying function of the present invention does not use a fixed photocatalyst but spreads the photocatalyst particles on the air curtain. This photocatalyst is a fine particle of titanium dioxide, and its particle size is preferably about 5 to 100 nanometers, for example. Such fine particles take a long time to fall on the floor surface and come into contact with a large amount of room air to exert a purification function. In addition, by using a composite photocatalyst in which apatite is precipitated on the surface of titanium dioxide fine particles, it is possible to exert the decomposition ability even with a conventional light quantity of 1/10 to 1/100, so that a weak light beam such as room light. Can also decompose bad odors, and there is no need to install an ultraviolet lamp. In addition, since the photocatalyst fine particles adsorb and fix bacteria and harmful chemical substances on the surface of the photocatalyst by the apatite on the surface, the photocatalyst fine particles can be retained and decomposed in the daytime when sprayed at night.

  In addition, what is marketed under the name of "Nanotron" (trademark) can be used for such a composite of apatite and titanium oxide. It has been confirmed that both titanium dioxide and apatite are harmless to the human body, and it has been proven by tests by public institutions such as the Japan Food Analysis Center that there is no problem even if such a photocatalyst is sprayed indoors. . It also supports the Food Sanitation Law.

  The photocatalyst fine particles are filled in the storage container 9 and dispersed in a state of being dispersed in the liquid. The dispersion liquid is not particularly limited as long as it does not adversely affect the human body and does not reduce the function of the photocatalyst. For example, water can be used. By spraying the photocatalyst fine particle-containing liquid as a very fine mist, the liquid can be evaporated before dropping to the floor, and the floor is not wetted.

  The air curtain device with a photocatalyst spraying function of the present invention is usually installed at the upper part of the entrance of a building as shown in FIG. Therefore, a detection signal from the door opening / closing sensor or human sensor is input to the control device 5, and when the door is opened, the blower fan 3 is immediately driven to form an air curtain, and immediately after that, photocatalyst fine particles are dispersed. Preferably. This is shown in FIG.

  Moreover, as shown in FIG. 8, by the timer control, the blower fan 3 and the photocatalyst spraying device 2 can be driven in the unmanned state in which the door is closed before the start of work so that sterilization and deodorization can be performed. In this case, the blower fan 3 is temporarily reversely rotated to change the flow of air into the room and the photocatalyst is sucked from the air discharge port 8 to sterilize and deodorize the inside of the air curtain device and the vicinity of the ceiling. preferable.

  As described above, according to the air curtain device with a photocatalyst spraying function of the present invention, the photocatalyst can be widely sprayed over the entire room on the air curtain to purify the entire room. Moreover, it is almost the same size as the conventional air curtain device and can be easily replenished with spent photocatalyst, making it suitable for deodorizing and purifying indoor air in general households, barbers, restaurants, offices, factories, etc. Is.

It is a perspective view which shows embodiment of the air curtain apparatus with a photocatalyst distribution function of this invention. It is a vertical sectional view of an air curtain device with a photocatalyst spraying function of the present invention. It is a front view which shows the internal structure of a photocatalyst spreading | diffusion apparatus. It is a side view which shows the internal structure of a photocatalyst spraying apparatus. It is a bottom view which shows the internal structure of a photocatalyst spraying apparatus. It is operation | movement explanatory drawing which shows the relationship between an arm and a handle | steering-wheel. It is operation | movement explanatory drawing by a sensor. It is operation | movement explanatory drawing by a timer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing of air curtain device 2 Photocatalyst spraying device 3 Blower fan 4 Driving motor 5 Control device 6 Stabilizing power supply device 7 Air intake port 8 Air discharge port 9 Storage container for liquid containing photocatalyst particles 10 Scattering handle 11 Fixing base 12 Motor 13 Eccentric cam 14 Arm 15 Discharge port of spraying device

Claims (4)

  Air with a photocatalyst spraying function, characterized in that a photocatalyst spraying device for spraying a liquid containing photocatalyst fine particles toward the airflow discharged from the air discharge port is attached to a housing incorporating a blower fan for forming an air curtain. Curtain device.   2. The air curtain device with a photocatalyst spraying function according to claim 1, wherein the photocatalyst fine particle-containing liquid is a dispersion of photocatalyst fine particles in which apatite is adhered to the surface of titanium dioxide.   2. The air with a photocatalyst spraying function according to claim 1, wherein the photocatalyst spraying device includes a mechanism for intermittently driving a spraying handle connected to the storage container for the liquid containing the photocatalyst fine particles by a motor. Curtain device.   The air curtain device with a photocatalyst spraying function according to claim 1, further comprising a control device that drives the blower fan and the photocatalyst spraying device in conjunction with a door opening / closing sensor or a human sensor.

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