JPH11192942A - Railcar air conditioners - Google Patents

Abstract

(57) [Summary] [Object] To sterilize bacteria in a vehicle using a photocatalyst. A punching plate 3 carrying a photocatalyst such as titanium oxide is provided in a duct of an air conditioner, and an ultraviolet transmitting glass is attached to a portion above the punching plate 3 for receiving sunlight. I have. A fluorescent lamp 13 or a luminescence type electric lamp 15 is installed facing the punching plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sterilizing air in a room in which bacteria are floating, and more particularly to a structure of an air conditioner effective for sterilizing a railway vehicle.

[0002]

2. Description of the Related Art Bacteria floating in a vehicle are ventilated by taking in outside air by an indoor blower of an air conditioner, and most of the bacteria are naturally discharged outside the vehicle. Hygiene is maintained by sterilization by such means. However, bacteria that have propagated inside the air conditioner or in the ventilation duct are cleaned and disinfected only every few years unless a bad smell or the like is generated. In recent years, awareness of antibacterial activity has been increasing, and in particular, it is necessary to constantly sterilize railway vehicles, which are public transportation means, to reduce bacteria remaining in the vehicles.

[0003]

The disinfection in the vehicle described above requires manpower and equipment, and in particular, the disinfection in the duct requires a large amount of labor due to a large amount of work.

It is an object of the present invention to kill bacteria by using a photocatalyst.

[0005]

SUMMARY OF THE INVENTION The invention is characterized in that the bacteria in the vehicle can be killed by sunlight or fluorescent or luminescent lamps.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. The outdoor unit (not shown) is disposed adjacent to and integrally with the indoor unit in the longitudinal direction of the vehicle. An air conditioner 1 is mounted on a roof of a vehicle body 10, a room air is sucked from a return port 11 in the vehicle, mixed with fresh air sucked from an outside air inlet 2, and a punching plate carrying a photocatalyst. Sterilized while passing through the opening of the indoor heat exchanger 4
Then, the cool air is blown into the vehicle through the air distribution duct 12 by the indoor blower 5. The punching plate 3 is arranged so as to block the air duct.

As the photocatalyst, titanium oxide, iron oxide, tungsten oxide, nickel oxide and the like are used. These photocatalysts may be converted into a sol liquid and supported on the punching plate 3 by various methods. For example, as a method of supporting the sheet on a punching plate, a method of applying a titanium oxide sol to the surface of the punching plate 3 and then baking the same to apply a semi-permanent life is used.

[0008] Punching plate 3 carrying a photocatalyst
As a light source for irradiating the surface with ultraviolet rays, sunlight is used. In general, an air conditioner mounted on a roof has a heat insulating material attached to an inner surface of a cover in order to prevent heat from entering by sunlight. However, in this embodiment, in order to utilize the ultraviolet rays of sunlight, a part of the cover above the punching plate 3 is cut out, and the ultraviolet transmitting glass 6 is attached. According to this, infrared rays, which are heat rays of sunlight, are cut off, and only ultraviolet rays radiate to the punching plate 3 inside the air conditioner.

Further, a fluorescent lamp 13 is provided in the return duct of the vehicle body so as to face the punching plate 3.
The fluorescent lamp 13 irradiates the punching plate 3 with light. The fluorescent lamp 13 is mainly lit at night. If the fluorescent lamp 13 is controlled in synchronization with the ON / OFF of the vehicle interior lamp 14, there is no need to newly provide a control circuit.

[0010] According to this configuration, sterilization can be performed by sunlight during the daytime. The photocatalyst can be expected to have a deodorizing effect of ammonia and the like in addition to the bactericidal action, and can significantly improve passenger comfort by purifying the air in the vehicle. Since the sunlight enters through the ultraviolet transmitting glass 6, the infrared rays are blocked, and it is possible to prevent an increase in heat in cooling.

At night, the fluorescent lamp 13 is turned on. If the fluorescent lamp 13 is installed at the suction opening of the return air via a gully (facing the grill), it is possible to perform indirect illumination of the room.

The shape of the punching metal 3 is determined from the viewpoint of contact with the return air and resistance. The punching metal 3 can be a member of another shape.

FIG. 2 shows a control circuit for the interior lamp and the fluorescent lamp.
The interior light 14 is turned on and off by the switch 21 from the AC 100 V power supply of the vehicle via the breaker 20.
It is only necessary to connect the fluorescent lamp 13 in parallel with the above. In addition, since the fluorescent lamp 13 is installed in the return duct of the vehicle body, the bulb can be replaced from the return port 11 and maintenance work is facilitated.

Another embodiment is shown in FIG. The basic configuration of the air conditioner is the same as that of FIG. The indoor air is sucked from the return port 11 in the vehicle, mixed with fresh air sucked from the outside air inlet 2, and sterilized while passing through the opening of the punching plate 3 on which the photocatalyst is carried. 4
Then, the cool air is blown into the vehicle through the air distribution duct 12 by the indoor blower 5. Luminol 7, which is a luminous paint, is adhesively applied to the inner surface of the glass directly above the punching plate 3, and the photocatalyst is irradiated with cold light to cause a reaction. Since luminol emits only light without emitting any heat, an increase in the heat load of the air conditioner can be prevented.

In addition, a luminescence type lamp which does not generate heat is also provided in the return duct, and the punching plate 3 is irradiated with auxiliary light from below to further activate the catalytic reaction.

[0016]

According to the present invention as described above,
With a simple structure of arranging a member carrying a photocatalyst in an air duct and irradiating it with sunlight or a fluorescent light or a luminescence type light, bacteria staying in the car can be sterilized, as in the past It does not require much labor.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a vehicle body provided with an air conditioner according to one embodiment of the present invention.

FIG. 2 is a control circuit diagram of a fluorescent lamp of the air conditioner of FIG.

FIG. 3 is a longitudinal sectional view of a main part of a vehicle body provided with an air conditioner according to another embodiment of the present invention.

[Explanation of symbols]

3: punching plate, 4: indoor heat exchanger, 5: indoor blower, 6: ultraviolet transmitting glass, 7: luminol, 13
... fluorescent light, 14 ... car light, 15 ... luminescence type electric light.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroto Yoshimi 794, Higashi-Toyoi, Kazamatsu-shi, Yamaguchi Prefecture Inside the Kasado Plant of Hitachi, Ltd.

Claims (6)

[Claims] 1. A member carrying a photocatalyst is provided in an air duct, and ultraviolet-transmitting glass or glass coated with luminol is disposed at a position facing the member and constituting an outer surface of the air duct. An air conditioner for a railway vehicle, characterized in that: 2. An air conditioner for a railway vehicle according to claim 1, wherein said member is a punching plate arranged so as to block said air duct. 3. The air conditioner for a railway vehicle according to claim 2, wherein an air inlet for fresh air and a suction port for fresh air are provided on the air inflow side of the punching plate. 4. An air conditioner for a railway vehicle, wherein a member carrying a photocatalyst is provided in an air duct, and a fluorescent light or a luminescence type light is provided opposite to said member. 5. An air conditioner for a railway vehicle according to claim 5, wherein said member is a punching plate arranged so as to block said air duct. 6. An air conditioner for a railway vehicle according to claim 5, wherein said fluorescent light or luminescence type electric light and an interior light are connected to a power supply in parallel.