JP2538094Y2 - Flame detector - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a flame detector applicable to fire detection such as a fire alarm, a fire extinguisher or a fire extinguishing system, and particularly to a flame detector installed outdoors. The present invention relates to a heat protection structure of a flame detection device that protects against heating due to direct sunlight and prevents malfunction or failure due to heating.

[Conventional technology and solutions]

2. Description of the Related Art Conventionally, a flame detection device has been put to practical use in order to detect a fire that occurs in a monitoring area when the fire detector is installed outdoors.

Conventional outdoor-installed flame detection device is installed outdoors, especially in the daytime in summer, when exposed to direct sunlight,
The temperature of the flame detector itself rises,
The failure or malfunction of the electronic element has caused the failure or malfunction of the flame detection device itself. Therefore, the object of the present invention is to solve the above-mentioned problem of the failure due to heating, and to prevent the temperature of the inside of the flame detecting device from rising even if it is exposed to direct sunlight, for example. An object of the present invention is to provide a structure of a flame detection device that prevents a failure or malfunction of an element.

[Means for solving the problem]

According to the present invention, in a flame detection device for detecting radiation emitted by a flame generated in a detection area, a rotatable joint that is mounted on a fixed object such as a ceiling or a wall of a building and sets the detection area with respect to a mounting position. A flame detection unit that detects the radiation of the flame, an inner case that stores the flame detection unit, an outer case of a flame detection device that is formed to cover the inner case through a heat insulating gap, A slit is provided in front and rear of the outer case so as to introduce air into a gap between the outer case and the inner case, and a flame detecting device that radiates heat from the slit through the air introduced into the heat insulating gap is provided. The heat conduction is interrupted by the heat insulating layer to suppress the temperature rise in the inner case. Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.

〔Example〕

An embodiment of the flame detecting device according to the present invention will be described with reference to the drawings.

FIG. 1 is an external view of a flame detecting device according to the present invention, FIG. 2 is a front view of the flame detecting device, FIG. 3 is a diagram showing a state where a front cover of the device is removed, and FIG. It is a rear view of a detection apparatus.

Now, referring to the external view of FIG. 1, the flame detection device 1 according to the present invention includes an outer cover 11, an outer case 12, a front cover 13, a mounting base 14, a joint 15, and a detection window 16,
The outer cover 11 and the outer case 12 form an outer case.

FIG. 2 shows a state where the flame detection device is viewed from the front,
FIG. 3 shows a state in which the front cover 13 is removed, and FIG. 4 shows a rear surface of the flame detecting device 1.

As shown in FIG. 3, an electronic circuit section 17 such as a detection section is provided inside the apparatus. Electric and electronic elements connected to the electronic circuit section 17 are housed in an inner case 18.

The flame detection device 1 is attached to a ceiling or a wall of a building provided with a monitoring area by an appropriate attachment means such as a screw via an attachment base 14. The flame detection device 1 can be freely rotated in up, down, left, and right directions by a freely movable joint, and the direction can be set according to a desired detection range. The radiation emitted by the flame generated in the detection area is emitted by the flame detection device 1
From the detection window 16 of the flame detection device 1, and infrared rays and ultraviolet rays are detected by a radiation detection unit (not shown) of the flame detection device 1.

Next, the heat insulation structure of the flame detection device according to the present invention will be described.

As shown in FIG. 3, a gap G is formed between the outer cover 11 and the outer case 12 and the inner case 18 inside the flame detection device 1. Further, as shown in FIG. 2, the front cover 13 is provided with a large number of slit-shaped ventilation holes 13a.

As shown in FIG. 4, ventilation holes 20 are also provided on the back surfaces of the outer cover 11 and the outer case 12.

Since the present flame detection device 1 is often installed outdoors,
Depending on installation conditions, it may receive direct sunlight. When the direct sunlight shines on the outer cover 11 and the outer cover 11 is heated, there is a gap G between the outer cover 11 and the inner case 18, and the air in the gap G performs a heat insulating action to form the outer cover 11.
The heat of 11 is prevented from being directly transferred to the inner case 18, so that the inside of the inner case 18 is not heated. Furthermore, front cover 13, outer cover 11, outer case
Since the vent holes 13a and 20 are provided in the air, the air flows and the heat radiation effect is improved, so that the air inside the flame detecting device 1 is also prevented from being heated. Therefore, the inner case
Electric and electronic elements provided inside 18 can be prevented from malfunctioning or malfunctioning due to thermal damage.

[Effect of the invention]

As is clear from the above description, according to the present invention, even in the case of a flame detection device installed outdoors, it is possible to prevent the temperature inside the device from rising due to direct sunlight, so that the internal electricity due to the temperature rise can be prevented. Since the failure and malfunction of the electronic elements can be prevented, the malfunction and failure of the flame detection device itself can be prevented.

[Brief description of the drawings]

FIG. 1 is an external view of a flame detecting device according to the present invention, FIG. 2 is a front view of the flame detecting device, FIG. 3 is a diagram showing a state where a front cover of the device is removed, and FIG. FIG. 3 is a rear view of the detection device. 1 flame detector, 11 cover, 12 outer case, 18
…… Inner case, G …… Void.

Claims (1)

(57) [Scope of request for utility model registration] A flame detecting apparatus for detecting radiation emitted by a flame generated in a detection area, wherein the joint is mounted on a fixed object such as a ceiling or a wall of a building, and a rotatable joint for setting the detection area with respect to a mounting position. A flame detection unit that detects the radiation of the flame; an inner case that stores the flame detection unit; an outer case of a flame detection device formed to cover the inner case via a heat insulating gap; A flame detection device, wherein slits are provided in front and rear of the outer case so as to introduce air into a gap between a case and the inner case, and heat is radiated from the slits through the air introduced into the heat insulating gap.