JPH10309440A - Purifying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify an exhaust gas discharge pipe and sufficiently purify exhaust gas by installing a honeycomb structure body, which has a large number of cell holes coated with a titanium dioxide coating to be radiated with light rays of an ultraviolet lamp, in the inside of a muffler of an automobile. SOLUTION: A honeycomb structure body 4 having a large number of cell holes 4a formed by extrusion molding of clay or a fine ceramic is installed in the inside of a muffler. The inner surface of each cell hole 4a is coated with a thin film of titanium dioxide. Ultraviolet rays are efficiently radiated to the respective cell holes 4a, 4a from an ultraviolet lamp 5 installed in the outer circumference of an exhaust gas pipe 2 in the upstream side of the muffler 3. An inversely turning-back wall 6 is formed in the downstream side of the honeycomb structure body 4 and an exhaust gas passing through the exhaust gas pipe 2 in the direction shown as an arrow is turned back by the inversely turning-back wall 6 and passed through the respective holes 4a, 4a and discharged out of a discharge outlet 8 via an outside route 7. By turning on the ultraviolet lamp 5, NOx and SOx of the exhaust gas passing through the cell holes 4a are efficiently oxidized and decomposed to harmless carbon dioxide gas and other gases by the strongly oxidizing performance of titanium dioxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purifying apparatus for purifying exhaust gas of automobiles and hot water in a bathtub.

[0002]

2. Description of the Related Art Conventionally, a purifying catalyst for purifying exhaust gas of an automobile is provided in an exhaust pipe close to an engine, so that the exhaust pipe becomes complicated and it is difficult to exert a sufficient purifying function. There was a problem that it is.
Further, conventionally, there is a so-called 24-hour bath that can be continuously used without circulating hot water in a bathtub and replacing the hot water, but a purification device provided in the 24-hour bath is provided by a method such as biological filtration. It is a purifying device for purifying hot water, and has problems that it becomes complicated and becomes large.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a compact purifying apparatus capable of effectively purifying exhaust gas and hot water in a bathtub. A first aspect of the present invention is a purifying apparatus for purifying an exhaust gas of an automobile, the purifying apparatus comprising a honeycomb structure having a large number of cell holes coated with titanium dioxide provided in a muffler; The structure comprises an ultraviolet lamp for irradiating light into the cell holes of the structure. Further, a second gist is a purifying device provided in a circulation channel for circulating hot water in a bathtub to purify the hot water, and the purifying device has a number of cell holes coated with titanium dioxide through which the hot water passes. And a UV lamp that irradiates light into the cell holes of the honeycomb structure.

[0004]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional configuration diagram of an exhaust gas purification device of a first embodiment. In FIG.
The honeycomb structure 4 having a large number of cell holes 4a is provided in the muffler 3 at the end of the exhaust pipe 2 of the automobile.
As shown in FIG. 5, is formed by extruding clay or fine ceramic particles from the die 23 of the extruder, cut at a cut surface P of a predetermined size, and then dried and fired. The inventor has developed a ferrule 23 that can produce a general tile clay or tile clay having a cell hole 4a having a thickness of about 0.8 mm and a pitch between cells of about 2.6 mm in a satisfactory manner. The honeycomb structure 4 having the square or square cell holes 4a can be easily formed. Further, it is also possible to form a honeycomb structure 4 made of glass.

The honeycomb structure 4 thus extruded is
The inner surface of each of the cell holes 4a is further coated with a thin film of titanium dioxide. For example, water is added to an alcohol solution of titanium tetraisopropoxide,
A titania sol hydrolyzed using nitric acid as a catalyst is produced, and the honeycomb structure formed in FIG. 5 is immersed in the titania sol, and then dried and fired. The honeycomb structure 4 coated with titanium dioxide in this way is provided inside the muffler 3,
An ultraviolet lamp 5 is provided on the outer periphery of the exhaust pipe 2 on the upstream side of the muffler 3.
Is arranged so that the ultraviolet rays emitted from the ultraviolet lamp 5 can be effectively irradiated into the cell holes 4a, 4a of the honeycomb structure 4, and the downstream side of the honeycomb structure 4 Is formed, and the exhaust gas passing through the exhaust pipe 2 in the direction of the arrow is inverted by the inverting wall 6 so that the exhaust gas is effectively introduced into each of the cell holes 4a, 4a of the honeycomb structure 4. The exhaust gas is discharged from an outlet 8 through an outer passage 7 formed between the outer periphery of the honeycomb structure 4 and the inner periphery of the muffler 3. 5 can also function as a reflector that reflects ultraviolet rays when irradiated.

In such a configuration, the ultraviolet lamp 5 is turned on to irradiate the inside of the cell hole 4a with ultraviolet light, so that NOx in the exhaust gas passing through the cell hole 4a is reduced.
Or SOx or the like is oxidatively decomposed into harmless carbon dioxide gas or the like by the strong oxidizing power of titanium dioxide, so that air pollutants such as NOx are extremely reduced, and exhaust gas can be discharged from the outlet 8. That is, it has been confirmed that by irradiating the coated titanium dioxide with light from the ultraviolet lamp 5, the titanium dioxide thin film acts as a photocatalyst, and can effectively remove air pollutants such as NOx.

Further, in this embodiment, the honeycomb structure 4 can be formed by using general tile clay or tile clay, and the small-diameter cell holes 4a are formed by an inexpensive material. A honeycomb structure 4 having an extremely large surface area can be formed, and titanium dioxide can be effectively coated on each cell hole 4a of the honeycomb structure 4 to manufacture the honeycomb structure 4 at low cost. Muffler 3 is compact to be big
An extremely effective exhaust gas purifying apparatus can be configured by being installed inside the apparatus. If the honeycomb structure 4 is formed of a light-transmitting material such as glass or plastic, it is possible to satisfactorily apply ultraviolet rays to the titanium dioxide coating surface, thereby further improving the function as a photocatalyst. Can be.

Next, FIG. 2 shows a second embodiment, and FIG.
This shows a schematic configuration of a so-called 24-hour bath. A 24-hour bath 10 has a bathtub 11 in which an inlet 11a and an outlet 11b are provided.
An opening is formed, and the suction port 11a and the ejection port 11b are communicated with each other through a circulating water channel 12. In the circulating water channel 12, a filtration filter 13, a pump 14, and a purifying device 1 are provided.
5, a heating device 16 is provided, and by driving the pump 14, the hot water in the bathtub 11 is drawn into the circulating water channel 12 from the suction port 11a, and the filter filter 13 filters the scale, hair, and the like, and Bacteria and the like are removed in the purification device 15, and further heated and maintained in the heating device 16, and hot water is ejected again into the bathtub 11 from the ejection port 11 b and circulated.
The cleaning device 15 in FIG. 3 can have a structure as shown in a schematic sectional view in FIG. 3. In FIG. 3, the cleaning device 15 includes a honeycomb structure 17 having a large number of cell holes 17a therein. The circulating water passage 12 is connected to the purification device 15 so that hot water flowing in the circulating water passage 12 can pass through each cell hole 17 a of the honeycomb structure 17.

As shown in FIG. 5, the honeycomb structure 17 can be extruded from a die 23 of an extruder, is formed of tile clay or tile clay, and has a titanium dioxide surface. And the inner peripheral surface of each cell hole 17a is coated. On the side of the honeycomb structure 17, an ultraviolet lamp 20 is provided in a room surrounded by mirrors 19, 19, 19, and the ultraviolet lamp 20 and the honeycomb structure 17 are separated by a transmission glass 18. The ultraviolet lamp 20 is arranged at a position where the ultraviolet lamp 20 is illuminated to irradiate ultraviolet rays into the cell holes 17a, 17a, 17a. A mirror 19 is also provided on the side of the honeycomb structure 17 opposite to the ultraviolet lamp 20. Ultraviolet rays emitted from the ultraviolet lamp 20 are reflected by the mirrors 19, 19, and 19 to effectively provide the cell holes 17a. , 17a, 17a.

In such a configuration, when the ultraviolet lamp 20 is turned on, each cell hole 17a is irradiated with ultraviolet light, and the titanium dioxide coated with the ultraviolet light generates a strong oxidizing power, and 17a
Strongly oxidatively decomposes substances in the hot water that comes into contact with the inner peripheral surface of the water, preventing the growth of various bacteria, and effectively killing Escherichia coli, especially with its strong oxidizing power, effectively preventing hot water rot You can do it. If the honeycomb structure 17 is formed of a translucent material such as glass or plastic, it is possible to satisfactorily apply ultraviolet rays to the titanium dioxide coating surface, and to further improve the function as a photocatalyst. Can be.

Next, FIG. 4 shows a cross-sectional configuration diagram of the heating device 16 described above. The heating device 16 is connected to the circulation channel 1.
2 and a honeycomb structure 21 inside thereof.
Are provided, and a large number of cell holes 21 are provided in the honeycomb structure 21.
a, 21a, 21a are formed, and each cell hole 21a, 2
The hot water passes through the insides 1 a and 21 a, and a heater 22 is wound around the outer periphery of the honeycomb structure 21. By causing the heater 22 to generate heat, the hot water passing through the inside of the honeycomb structure 21 can be effectively heated by the heater 22, and the heating device 16 having a compact configuration can be obtained.

[0012]

According to the present invention, there is provided a purifying apparatus for purifying exhaust gas of an automobile, the purifying apparatus comprising a honeycomb structure provided in a muffler and having a large number of cell holes coated with titanium dioxide; Since the honeycomb structure is constituted by an ultraviolet lamp that irradiates light into the cell holes, the titanium dioxide coated on the honeycomb structure is irradiated with light by turning on the ultraviolet lamp, whereby Titanium generates a strong oxidizing power, so that NOx and SOx can be effectively removed, and the exhaust gas can be purified very effectively.

[0013] Further, there is provided a purifying device provided in a circulation water channel for circulating hot water in a bathtub to purify the hot water, wherein the purifying device has a honeycomb structure having a large number of cell holes coated with titanium dioxide through which the hot water passes. The body is constituted by an ultraviolet lamp that irradiates light into the cell holes of the honeycomb structure. By illuminating the ultraviolet lamp, light is irradiated into the cell holes, thereby being coated. Titanium dioxide can generate strong oxidizing power to effectively kill various bacteria such as Escherichia coli in the hot water, and has an effect of effectively preventing hot water from decay and purifying the hot water in the bathtub.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional configuration diagram of an exhaust gas purifying apparatus according to a first embodiment.

FIG. 2 is a schematic configuration diagram of a 24-hour bath.

3 is a schematic cross-sectional configuration diagram of the purification device in FIG.

FIG. 4 is a schematic configuration diagram of a heating device in FIG. 2;

FIG. 5 is a perspective configuration diagram showing a state where a honeycomb structure is extruded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exhaust gas purifier 2 Exhaust pipe 3 Muffler 4 Honeycomb structure 4a Cell hole 4b Central hole 5 Ultraviolet lamp 6 Inversion wall 10 24 hour bath 11 Bathtub 12 Circulating water channel 15 Purifier 16 Heating device 17 Honeycomb structure 17a Cell hole 18 Transparent glass Reference Signs List 19 mirror 20 ultraviolet lamp 21 honeycomb structure 21a cell hole 22 heater 23 base

Claims (2)

[Claims] 1. A purifying apparatus for purifying exhaust gas of an automobile, the purifying apparatus comprising a honeycomb structure provided in a muffler and having a large number of cell holes coated with titanium dioxide, and the honeycomb structure. A purifying device comprising an ultraviolet lamp for irradiating light into the cell hole. 2. A purifier for purifying hot water provided in a circulation channel for circulating hot water in a bathtub, wherein the purifier has a honeycomb structure having a plurality of cell holes coated with titanium dioxide through which hot water passes. A purifying apparatus comprising: a body; and an ultraviolet lamp that irradiates light into the cell holes of the honeycomb structure.