JPH11104225A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve contact efficiency and to provide a high deodorizing effect by arranging a dust collecting part on the suction side of an air blower and arranging a deodorizing part, which is formed by opposing an adsorber with a photocatalyst and an excitation source for exciting the photocatalyst, on the discharge side on the other hand. SOLUTION: When an air blower 10 is operated, air containing dust or the like and smell component is a room is sucked from a suction grill 2 into a casing 1. When passing the air through a high-performance dust filter 13 while being straightened, the dust or the like is almost removed, and viruses or bacteria are adsorbed, removed and inactivated by an antibacterial material. This dust removed air is sucked from an inlet 10a of the air blower 10, accelerated by an impeller 10b and discharged from an outlet 10c toward the upper deodorizing part. Then, air containing the smell component is efficiently contacted to an adsorber 6 with a photocatalyst and ventilated, the smell component is adsorbed by the adsorber, the photocatalyst is turned into excited state by light containing ultraviolet rays radiated from an ultraviolet lamp 7, and the smell component is efficiently decomposed and deodorized with the oxidizing power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus for collecting and purifying dust and the like in the air, and more particularly to an air purifying apparatus having a light deodorizing function of adsorbing and decomposing indoor odor components. .

[0002]

2. Description of the Related Art A conventional air cleaning device of this type, for example,
The basic structure of a conventional air cleaning device that performs a deodorizing action using a photocatalyst will be described with reference to FIG. FIG. 6 is a schematic cross-sectional view of a conventional air cleaning device (electrically-collecting type) having a light deodorizing function. Its basic configuration is to provide a dust collecting section and a deodorizing section on the suction side of the blower.

[0003] In Fig. 6, reference numeral 1 denotes a casing, in which a pre-filter 3 for removing dust and large particles in the air in order from a suction port (suction grill 2) is provided on a suction side of a blower 10; A dust collecting unit is composed of a positively charged ionizing unit 4 and a negatively charged electrostatic dust collecting filter 5 that adsorbs and removes dirt particles. Adsorption with a photocatalyst coated with titanium oxide as a photocatalyst on the rear surface. The body 6, an ultraviolet lamp 7 provided to face the adsorbent, and a reflector 8 for efficiently irradiating the adsorbent with ultraviolet light constitute a deodorizing section. On the discharge side of the blower 10, a blowout grill 12 is provided on the upper part of the casing 1.

[0004] Examples of this type of air purifier are disclosed in, for example, JP-A-1-159033 and JP-A-3-60720. Regardless of the system or the fiber filter system, the dust collector and the deodorizer are provided on the suction side of the blower.

[0005]

However, in the above-mentioned conventional air purifying apparatus, the deodorizing section is provided behind the dust collecting section on the suction side of the blower, so that the sucked air is rectified (laminar flow). On the suction side through which air is ventilated, it is necessary to increase the area of the ventilation portion (outer shape) of the adsorbent with a photocatalyst in order to increase the contact area of the adsorption portion. On the other hand, if the area of the adsorbent with a photocatalyst is large, the irradiation of light from the ultraviolet lamp, which is the excitation source, is different between the vicinity of the light source and the periphery, and there is a problem that the deodorizing effect cannot be sufficiently exhibited. Was.

As shown in FIG. 7, when the shape of the adsorbent with photocatalyst 6 is made into a honeycomb shape or the like to reduce the area of the ventilation portion (outer shape), the dust collecting portion and the deodorizing portion (adsorbent with photocatalyst) are reduced. A space for forming the wind guide cover 9 is required between them, and the structure is against the thinning of the device body.

Further, since the ultraviolet lamp 7 is located at the center of the main body, even if the lamp is burned out due to its life, it is difficult to determine from the outside, and the cost is increased by providing a light guide tube to notify the user. And replacement of the lamp itself was not easy. In the configuration in which the dust collecting unit and the deodorizing unit are arranged on the suction side of the blower 10, there is a problem that it is not possible to suppress germs and the like which may be generated and multiplied in the discharge side ventilation passage 11 from the blowing unit to the outlet. There was also.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned various problems, and has a light deodorizing function which is capable of reducing the thickness of the apparatus body and the size of the deodorizing section, is easy to maintain, and has a high deodorizing and antibacterial effect. It is an object of the present invention to provide an air cleaning device having the following.

[0009]

Means for Solving the Problems The present invention has been made to achieve the above object, and the invention according to claim 1 is an air purifying apparatus for collecting and purifying dust and the like in the air.
The dust collecting unit is provided on the suction side of the blower, and the deodorizing unit is provided on the discharge side with the adsorbent with photocatalyst and the excitation source for exciting the photocatalyst facing each other. With this configuration, first, dust, pollen, house dust, viruses and other germs in the air are adsorbed and removed at the dust collecting part on the suction side of the blower, and then the photocatalyst is provided at the deodorizing part provided on the discharge side of the blower. Since the air containing the odor component is ventilated through the ventilation section of the adsorbent in a turbulent state, the contact efficiency is improved, and a high deodorizing effect is obtained.

According to a second aspect of the present invention, in the air purifying apparatus according to the first aspect, a clean air blowing grill is provided detachably, and a deodorizing section is provided near the blowing grill. With this configuration, the blowout grill is made detachable, so that maintenance of the deodorizing section can be easily performed, and the air once purified in the dust collecting section is further blown out at the final stage in the discharge side ventilation passage of the blower. Immediately before the deodorization and antibacterial treatment, more purified air can be released.

[0011] The invention according to claim 3 is based on claim 2.
In the air purifying apparatus described in the above, an ultraviolet lamp serving as an excitation source and a reflecting plate reflecting light are provided on the adsorbent with a photocatalyst below the adsorbent with a photocatalyst, and the shape of the blowing grill is such that direct light from the ultraviolet lamp is not emitted. It was made. According to this configuration, the light emitted from the ultraviolet lamp and the reflection plate thereof is applied to the adsorbent with a photocatalyst such as a honeycomb from the lower surface, and the odor component is decomposed and decomposed by the strong oxidizing action of the photocatalyst.
Although it is deodorized, of the light emitted from the ultraviolet lamp, the direct light leaking upward from the honeycomb holes of the adsorbent with a photocatalyst can be effectively shielded by providing a light shielding portion or the like in the blowout grill.

According to a fourth aspect of the present invention, in the air purifying apparatus of the second aspect, an ultraviolet lamp serving as an excitation source and a reflecting plate for reflecting light to the adsorbent with a photocatalyst are provided below the adsorbent with a photocatalyst. A plate for reflecting or blocking direct light from an ultraviolet lamp is provided between the blow grill and the adsorbent with a photocatalyst. With this configuration, of the light emitted from the lower surface of the adsorbent with a photocatalyst by the ultraviolet lamp, the direct light that leaks upward through the vent hole (honeycomb hole) of the adsorbent with a photocatalyst is blown out by the blowout grill and the photocatalyst. It is effectively shielded by a reflector or a light shielding plate provided between the adsorbent and the reflector, and in the case of the reflector, the leaked direct light is reflected again on the upper surface of the adsorbent with a photocatalyst, so that a higher deodorizing effect can be obtained.

Further, the invention according to claim 5 is the same as the claim 2.
In the air purifying apparatus described above, an ultraviolet lamp serving as an excitation source and a reflecting plate for reflecting light are provided on the adsorbent with a photocatalyst above the adsorbent with a photocatalyst. With this configuration, light from the ultraviolet lamp irradiates the adsorbent with the photocatalyst from the upper surface, and direct light is directed upward by the reflector that covers the upper part of the lamp, contrary to the inventions described in claims 3 and 4. Leakage can be prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air purifying apparatus according to the present invention will be described below with reference to FIGS. 1 to 5. In FIG. explain.

A first embodiment of the air cleaning device of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a schematic sectional view showing a basic structure of an air purifying apparatus of the present invention, and FIG. 2 is a partially cutaway exploded perspective view of the air purifying apparatus of the present invention. The basic configuration is such that a dust collecting section is provided on the suction side of the blower, and a deodorizing section is provided on the discharge side.

In FIG. 1, a sirocco fan is provided as a blower 10 for circulating air inside a casing 1 of the air cleaning device. A high-performance dust filter 13 is provided on the suction side of the blower 10, and the ultraviolet lamp 7 and its reflection plate 8 as an excitation source for exciting the photocatalyst face the adsorbent 6 with the photocatalyst from below on the discharge side. And constitutes a deodorizing section. The casing 1 is provided with a suction grille 2 at a suction port and a blowout grill 12 at a blowout port, both of which are detachable.

The dust collecting filter 13 is a high-performance hepa filter in which a non-woven fabric made of a special resin fiber is formed into a pleated (pleated) shape and the dust collecting area is greatly increased, and has a high dust collecting efficiency (99. 97%) and uses antibacterial filter on the filter surface, so that it can adsorb and remove pollen and smoke from tobacco, nitrogen oxides, house dust, viruses and other germs in the air. It has the effect of inactivating (suppressing activity) and suppressing its fertility.

The adsorbent 6 with a photocatalyst is formed in a honeycomb shape for the purpose of reducing the area of the ventilation portion (outer shape), reducing the ventilation resistance and increasing the contact surface area, and is provided on the surface of a honeycomb carrier made of a metal such as aluminum. It is obtained by adding zeolite as an adsorbent and titanium oxide as a photocatalyst. As the adsorbent, activated carbon or ceramic may be formed into a honeycomb shape or the like, and a photocatalyst may be added or kneaded. As the photocatalyst, in addition to titanium oxide, a simple substance of a metal oxide such as tungsten oxide or zinc oxide or a composite thereof may be used.

As an excitation source for exciting the photocatalyst, a straight-tube ultraviolet lamp 7 is provided to face the above-mentioned adsorbent 6 with a photocatalyst. The ultraviolet lamp 7 may be any as long as it can emit light containing ultraviolet rays (wavelength 380 nm or less). In this embodiment, a black light blue fluorescent lamp is used. May be used.

The reflecting plate 8 efficiently reflects the light from the ultraviolet lamp 7 to the adsorbent 6 with photocatalyst. The adsorbing member 6 with photocatalyst, the ultraviolet lamp 7 and the reflecting plate 8 form a deodorizing section. I have.

Next, the operation of the air purifying apparatus according to this embodiment will be described below.

In the above configuration, when the operation switch of the air cleaning device is turned on and the blower 10 is operated, the air containing dust and odor components in the room is sucked into the casing 1 from the suction grill 2 and the high-performance dust collection is performed. When passing through the filter 13 in a rectified (laminar flow) state, most of dust and the like are removed, and viruses and various bacteria are also adsorbed and removed by the antibacterial material, thereby being inactivated.

The air from which dust has been removed is sucked through an inlet 10a of a blower (sirocco fan) 10, and is impeller 10b.
And discharged from the outlet 10c toward the upper deodorizing section. The air containing the odor component accelerated by the impeller of the blower and discharged in a turbulent state is efficiently contacted with the honeycomb-shaped adsorbent with photocatalyst 6 and is ventilated. At this time, the odor component is adsorbed by the adsorbent, and the photocatalyst is irradiated with light containing ultraviolet rays by the ultraviolet lamp 7, so that the photocatalyst is in an excited state (active state), and the oxidizing power efficiently reduces the odor component. Decomposes and deodorizes (exactly, the generated hydroxyl radical decomposes organic substances into carbon dioxide and water).

Also, titanium oxide as a photocatalyst has antibacterial properties comparable to inorganic antibacterial materials even with a weak ultraviolet light amount, and also has a sterilizing effect on ultraviolet rays. Even when germs and the like are generated and multiplied in the inside, the deodorizing and antibacterial treatment can be performed in the deodorizing section near the blowout grill 12, which is the final processing stage on the discharge side. In this way, the clean air that has been subjected to dust removal, deodorization, and antibacterial treatment is discharged from the outlet grill 12.

Therefore, the air purifying apparatus of the present embodiment
By making the device thinner and reducing the size of the deodorizing section, the small space near the blow-out grill is effectively used, the maintenance of the deodorizing section is easy, and the air discharged from the blower is adsorbed in a turbulent state with a photocatalyst. Since the body is ventilated, the contact efficiency is improved, and a high deodorizing efficiency can be obtained.

FIG. 3 is an enlarged schematic sectional view showing a second embodiment of the deodorizing section of FIG. In the present embodiment, only the points different from the first embodiment will be described.

In the air cleaning apparatus according to the present embodiment, the deodorizing section provided near the blow grill 12 has an ultraviolet lamp 7 for exciting the photocatalyst and a light below the adsorbent 6 with the honeycomb-shaped photocatalyst. A light-reflecting plate 8 is provided, and a light-shielding portion 15 is provided on a blow-off grill 12 at a position directly above an ultraviolet lamp through which the direct light 14 from the ultraviolet lamp 7 may leak through the adsorbent 6 with a photocatalyst. It is.

Therefore, in this embodiment, in addition to having the same operation and effect as the first embodiment, of the light irradiated from the ultraviolet lamp to the lower surface of the photocatalyst adsorbent, the photocatalyst adsorber Direct light leaking upward from the honeycomb holes of the body can be effectively shielded by providing a light-shielding portion or the like in the blowout grill.

FIG. 4 is an enlarged schematic sectional view of a main part showing a third embodiment of the deodorizing section of FIG.

The deodorizing section of the air purifying apparatus of the present embodiment
An ultraviolet lamp 7 that excites the photocatalyst below the honeycomb-shaped adsorbent 6 with a photocatalyst, and a reflecting plate 8 that reflects light below the ultraviolet lamp 7
And a plate that reflects or blocks direct light 14 from the ultraviolet lamp 7 directly above the ultraviolet lamp 7 and between the blow-out grill 12 and the adsorbent with photocatalyst 6, in the figure, a reflection plate 8a is provided.

Therefore, in the present embodiment, in addition to the same operation and effect as in the first embodiment, the direct light leaking upward through the honeycomb holes of the adsorbent with photocatalyst is reflected. It is effectively shielded by a plate or a light shielding plate, especially in the case of a reflection plate, since the leaked direct light and a part of the light other than the direct light are reflected again on the upper surface of the adsorbent with a photocatalyst,
While suppressing light leaking out of the main body, it is effectively used for activating the photocatalyst, and an extremely high deodorizing effect can be obtained.

FIG. 5 is an enlarged schematic sectional view of a main part showing a fourth embodiment of the deodorizing section of FIG.

The deodorizing section of the air purifying apparatus of the present embodiment is opposite to the second and third embodiments in that the photocatalyst is located above the honeycomb-shaped adsorbent with photocatalyst 6, that is, between the photocatalyst and the blowout grill 12. Is provided with an ultraviolet lamp 7 for exciting light and a reflector 8 for reflecting light above the ultraviolet lamp 7.

Therefore, in the present embodiment, in addition to having the same operation and effect as the first embodiment, since the light from the ultraviolet lamp is irradiated from the upper surface of the adsorbent with the photocatalyst, the honeycomb holes are formed. Direct light passing through and leaking goes downward in the main body, so there is no need to provide a light-shielding plate,
The reflecting plate covering the upper part of the ultraviolet lamp can prevent the direct light of the lamp from leaking out of the main body. Furthermore, since the ultraviolet lamp is provided directly below the blow grill, it is easier to determine whether the ultraviolet lamp is operating or to replace the lamp.

The ultraviolet lamp (peak wavelength 36) used in the second to fourth embodiments is used.
0 nm) at the measurement point, the UV intensity at the measurement point is 0.001 mW / cm ² or less, which is 0.780 mW / c in the midsummer shade.
m ² , UV intensity under 2 m of white fluorescent lamp in a dark room is 0.
Since it is 001 to 0.002 mW / cm ² , it cannot be particularly strong enough to harm the human body. The ultraviolet lamp used was a black light blue fluorescent lamp, which contains blue visible light, so it is easy to determine whether the ultraviolet lamp is operating or not through a blowout grill. Since there is no need to provide, the cost is reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention. For example, in the present invention, the reflector is provided above or below the ultraviolet lamp. However, the present invention is not particularly limited to this, and the outer or inner surface of the ultraviolet lamp may be half-coated to have the function of the reflector. .

[0038]

Since the air purifying apparatus of the present invention has the above-described structure, the invention according to claim 1 can reduce the thickness of the apparatus body and the size of the deodorizing section, and reduce the odor component from the blower. Since the discharged air containing air is passed through the adsorbent with photocatalyst in a turbulent state, the contact efficiency is improved, and a high deodorizing effect can be obtained.

According to the second aspect of the present invention, since the blow-out grill is made detachable, the small space near the blow-out grill can be effectively used to easily perform maintenance of the deodorizing section, and the dust collecting section can be used. The air once purified is further deodorized and antibacterial treated immediately before the blow-out grill, which is the final treatment stage in the discharge-side ventilation path of the blower, so that it is possible to release more purified air.

According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, of the light emitted from the ultraviolet lamp to the lower surface of the photocatalyst adsorbent, the honeycomb hole of the photocatalyst adsorbent is provided. By providing a light-shielding portion in the blowout grill, it is possible to effectively block direct light that leaks upward from above.

According to a fourth aspect of the present invention, in addition to the effect of the second aspect, the direct light leaking upward through the honeycomb holes of the adsorbent with a photocatalyst is reflected by a reflecting plate or a light shielding plate. Effective shielding, especially in the case of reflectors,
Since the leaked direct light and a part of the light other than the direct light are reflected again on the upper surface of the adsorbent with a photocatalyst, the light leaking out of the main body is suppressed, and the light is effectively used for activating the photocatalyst, and is extremely high. Deodorizing effects can be obtained.

Furthermore, in the invention according to claim 5, in addition to the effect described in claim 2, since the light from the ultraviolet lamp is irradiated from the upper surface of the adsorbent with a photocatalyst, a light shielding plate or the like is not used. Also, there is no possibility that the direct light leaks out of the main body, and since the ultraviolet lamp is provided directly below the blowout grill, it is easier to determine whether the ultraviolet lamp is operating or to replace the lamp.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a basic structure of a first embodiment of an air cleaning device of the present invention.

FIG. 2 is a partially cutaway exploded perspective view showing the first embodiment of the air cleaning device of the present invention.

FIG. 3 is an enlarged schematic cross-sectional view of a main part showing a second embodiment of the deodorizing unit of FIG. 1;

FIG. 4 is an enlarged schematic cross-sectional view of a main part showing a third embodiment of the deodorizing unit in FIG. 1;

FIG. 5 is an enlarged schematic cross-sectional view of a main part showing a fourth embodiment of the deodorizing unit of FIG. 1;

FIG. 6 is a schematic sectional view showing a basic structure of a conventional air purifying device having a light deodorizing function.

FIG. 7 is a schematic cross-sectional view of a case where a miniaturized adsorbent with a photocatalyst is provided in the air cleaning device of FIG. 6;

[Explanation of symbols]

 6 Adsorbent with photocatalyst (deodorizing part) 5 Ultraviolet lamp (excitation source, deodorizing part) 8 Reflector 8a Reflector or light shield 10 Blower 12 Blow grill 13 Dust filter (dust collector) 14 Direct light 15 Light shield

Claims (5)

[Claims] 1. An air purifying apparatus for collecting and purifying dust and the like in the air, wherein a dust collecting portion is arranged on a suction side of a blower, and an excitation source for exciting an adsorbent with a photocatalyst and a photocatalyst is provided on a discharge side. An air purifying device, wherein a deodorizing unit is provided facing the air purifying unit. 2. The air purifying apparatus according to claim 1, wherein the deodorizing section is provided near a clean air blow-off grill, and the blow-off grill is detachably provided. 3. An ultraviolet lamp as an excitation source and a reflecting plate for reflecting light upward are provided below the adsorbent with a photocatalyst, and the shape of the blowout grill is such that direct light from the ultraviolet lamp is not emitted. The air purifying apparatus according to claim 2, wherein: 4. An ultraviolet lamp serving as an excitation source and a reflector for reflecting light upward are provided below the adsorbent with photocatalyst, and direct light from the ultraviolet lamp is supplied between the blowout grill and the adsorbent with photocatalyst. 3. The air purifying apparatus according to claim 2, wherein a plate for reflecting or blocking light is provided. 5. The air purifying apparatus according to claim 2, wherein an ultraviolet lamp serving as an excitation source and a reflecting plate reflecting light downward are provided above the adsorbent with a photocatalyst.