JPH058479B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a sampling tube type fire detection device equipped with a suction port.

<Prior Art> As a fire detection device using a sampling tube, a smoke tube type smoke detector used in ships and the like as shown in FIG. 2 has been known. This device is installed in each hold.
1, 12, 13 are provided with sampling tubes 21, 22, 23 with one end open, and through these sampling tubes 21, 22, 23, each hold 11, 1
The smoke-containing air of Nos. 2 and 13 was guided to a scattered light type smoke detection section 30 provided at the base end to detect a fire. Note that 40 is a suction device such as a fan, and 51, 52, and 53 are valves. When a fire is detected, the valves 51 to 53 are sequentially closed to detect the hold where the fire has occurred.

<Problems with the prior art> When the temperature and dust are almost the same in all holds, such as in the hold of a cargo ship, such a device cannot be used with a smoke detector with a common fixed sensitivity, or when the hold is high temperature. could be used by providing a common cooling device to the smoke detector.

Furthermore, if this method is used in a fire detection device in a clean room of a semiconductor factory, etc., the smoke detection section can be set to high sensitivity because there is little dust in the clean room itself, so even if there is airflow inside the room, smoke will not be detected. It can be detected early, allowing initial response and reducing losses.

However, manufacturing equipment installed indoors has high internal temperatures and can generate small amounts of combustion products, so to detect fires, a separate small fire detector that can withstand high temperatures is built in. Therefore, the drawback was that the equipment as a whole was expensive.

<Means for Solving the Problems> In view of the above-mentioned drawbacks, the present invention uses a sampling tube system to monitor fires in equipment that generates high temperatures. In this device, a plurality of the above-mentioned sampling tubes are installed, and the other one is installed in a place such as a clean room where there is room temperature and little environmental noise.

<Function> Even if the air inside the manufacturing equipment is heated to a high temperature, the cold air that flows into the sampling tube through the suction port installed in the other clean room cools it down by the time it reaches the smoke detection section, making it impossible to detect smoke. Monitoring and fire detection shall be performed normally without any condensation occurring in the area.

<Example> An embodiment of this invention will be explained with reference to FIG.

In the figure, 1 is a clean room such as a semiconductor factory, and 2 is semiconductor manufacturing equipment such as a burn-in device that is installed in the clean room 1 and generates high temperature inside. It is kept in a clean condition. Reference numeral 51 denotes a sampling pipe whose suction port 61 is provided in the return duct of the clean room 1 and monitors the entire room 1; 52 is a sampling pipe whose suction port 62 is provided in the manufacturing equipment 2; It is connected to a scattered light type smoke detector 8 through a common sampling tube 7. 9 is a suction device such as a fan.

Next, the operation of this device will be explained.

Air in the clean room 1 flows through the suction port 61 and the sampling pipe 51 to the common sampling pipe 7 and then to the smoke detection section 8. Further, the high temperature air inside the semiconductor manufacturing equipment 2 also flows from the suction port 62 through the sampling pipe 52 to the common sampling pipe 7, joins with the air in the cold clean room 1, is cooled, and flows to the smoke detection section 8.

Also, in clean room 1 or equipment 2
If a fire breaks out inside and smoke is generated, the suction ports 61, 6
2 through sampling tubes 51, 52 and the common sampling tube 7 to the smoke detection section 8, where smoke is detected and the occurrence of a fire is notified.

In addition, in the above apparatus, the sampling pipe 51 of the clean room 1 and the sampling pipe 52 of the equipment 2
If the relationship between the suction amounts is set such that the former is large and the latter is small, further cooling and sufficient dew condensation prevention effects can be obtained. Further, the smoke detection section 8 can also be of an ionization type.

<Effects> Since the device of the present invention is configured and operates as described above, it is possible to detect fires in equipment that generates high temperatures using a common sampling pipe type without installing a cooling device in the device. This has the effect of providing an inexpensive fire detection device.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a fire detection device using a sampling tube according to the present invention, and FIG. 2 is a schematic diagram of a conventional fire detection device. 1... Clean room, 2... Semiconductor manufacturing equipment, 3... Ventilation system, 4... Filter, 51, 5
2... Sampling tube, 61, 62... Suction port,
7... common sampling tube, 8... smoke detection section,
9...Suction device.

Claims (1)

[Claims] 1. In a device that detects a fire by guiding smoke-containing air from a room or equipment to a smoke detection unit through a sampling pipe equipped with a suction port, a plurality of the above-mentioned sampling pipes are provided, and one of them is installed in a room or equipment where high temperatures are generated. A fire detection device using a sampling tube, which is characterized by being installed inside the equipment, and the other end being installed in a place with room temperature and low environmental noise, such as a clean room.