CN209842827U - Vertical type backward smoke-sensitive detector labyrinth combining infrared light and blue light - Google Patents

Abstract

The utility model provides a vertical back smoke detector maze of sensory detector of infrared light and blue light combination, measure the chamber and locate including the maze integral type transmitting tube and the receiver tube of labyrinth measurement intracavity, integral type transmitting tube transmission infrared light and blue visible light, the optical axis of integral type transmitting tube with contained angle between the optical axis of receiver tube is the acute angle, thereby the integral type transmitting tube with the light path after the receiver tube constitutes. The vertical backward smoke detector labyrinth combining the infrared light and the blue light has the advantages of scientific design, simple structure, improvement of response capability to various kinds of smoke and reduction of misinformation.

Description

Vertical type backward smoke-sensitive detector labyrinth combining infrared light and blue light

Technical Field

The utility model relates to a smoke detector field, specific theory has related to a vertical back smoke detector maze of infrared light and blue light combination.

Background

Smoke detectors widely used in automatic fire alarm systems include ion smoke detectors and photoelectric smoke detectors. The ion smoke detector has good detection effect on various open fire smoke and can also detect smoldering fire smoke, but because the ion smoke detector is easily influenced by the environment, the false alarm rate is high, and the ion smoke detector contains a low-energy pollution source, the ion smoke detector cannot meet the requirement on green and environment-friendly products, and is basically replaced by a photoelectric smoke detector.

At present, smoke fire detectors sold in the market all adopt a single infrared beam scattering principle, and the detectors with the structure have weak background signals and are easy to manufacture, so the detectors are widely adopted, but the smoke detectors only respond to gray and white smoke with larger particle sizes generated by smoldering wood and cotton ropes, have slow response to black smoke with smaller particle sizes generated by solid and liquid fires, and have particle sizes smaller than 0.4The open fire of the m particles is basically not responded, and non-fire alarm interference factors such as water mist, dust and the like with similar particle sizes to the smoke particles cannot be distinguished. In order to improve the sensitivity of the existing smoke detector to black smoke with small particle size, the mode of reducing the alarm threshold is often adopted, but when smoke interference with light color such as dust, cigarette smoke and the like exists, the detector can generate response output exceeding the alarm threshold due to small smoke concentration, and the phenomenon of false alarm often occurs.

In order to solve the above problems, people are always seeking an ideal technical solution.

Disclosure of Invention

The utility model aims at the not enough of prior art to a design science, simple structure, improvement to the response ability of various smog, reduce the vertical back smoke detector maze of infrared light and blue light combination of wrong report are provided.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is: the utility model provides a smoke detector maze is felt to vertical back of infrared light and blue light combination, includes the labyrinth and measures the chamber and locate integral type transmitting tube and receiver tube in the labyrinth measurement intracavity, integral type transmitting tube transmits infrared light and blue visible light, the optical axis of integral type transmitting tube with contained angle between the optical axis of receiver tube is the acute angle, thereby the integral type transmitting tube with the receiver tube constitutes the back light path.

Basically, the included angle between the optical axis of the integrated transmitting tube and the optical axis of the receiving tube is 10-90 degrees.

Basically, a light screen is arranged between the integrated transmitting tube and the receiving tube.

Basically, install the shield cover on the receiving tube.

Basically, the optical axis of the integral type transmitting tube and the optical axis of the receiving tube are intersected at the center of the labyrinth measuring cavity.

Basically, the distances from the integral type transmitting tube and the receiving tube to the center of the labyrinth measuring cavity are equal, and the center of the labyrinth measuring cavity is positioned above the installation positions of the integral type transmitting tube and the receiving tube.

Basically, the labyrinth measurement cavity is enclosed by labyrinth base and labyrinth lid and closes and form, be provided with the circuit board on the labyrinth base and be used for the installation respectively the integral type transmitting tube with the light seat of receiver tube.

Basically, the labyrinth cover is provided with a protective net, and the mesh size of the protective net is not more than 1 mm.

Basically, the emission of infrared light and blue visible light is controlled by the integral type emission tube by independent control switch respectively.

Basically, the front ends of the integrated transmitting tube and the receiving tube are both provided with lenses.

The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model discloses utilize integral type transmitting tube to launch infrared light sum blue visible light simultaneously, the receiver tube is received and is come from the infrared light sum blue visible light of light path behind the integral type transmitting tube, and blue visible light not only reacts sensitively to the less black smog of particle diameter, and blue visible light sum infrared light stacks in addition, has improved the intensity of light to need not to transfer and hang down the response threshold value, just also eliminated the wrong report phenomenon that this reason leads to.

Blue visible light and infrared light form two groups of light paths, and in the final operation and judgment process, the average value of two groups of data can be taken to judge the dust accumulation degree in the maze, slow-changing dust accumulation is compensated, and a pollution alarm is given out after the dust accumulation degree exceeds the average value.

Drawings

Fig. 1 is a schematic structural diagram of the vertical backward smoke detector labyrinth combined by mid-infrared light and blue light.

FIG. 2 is a schematic diagram of a vertical backward smoke detector labyrinth with combined infrared and blue light in other embodiments.

In the figure: 1. an integral launch tube; 2. a receiving tube; 3. a labyrinth measurement cavity; 4. a light seat; 5. a visor; 31. a labyrinth base; 32. a labyrinth cover.

Detailed Description

The technical solution of the present invention will be described in further detail through the following embodiments.

As shown in figure 1, the vertical backward smoke detector labyrinth combining infrared light and blue light comprises a labyrinth measuring cavity 3, and an integrated transmitting tube 1 and a receiving tube 2 which are arranged in the labyrinth measuring cavity 3, wherein the integrated transmitting tube 1 transmits infrared light and blue visible light, an included angle between an optical axis of the integrated transmitting tube 1 and an optical axis of the receiving tube 2 is an acute angle, and the product effect is best when the included angle is 10-90 degrees, so that the integrated transmitting tube 1 and the receiving tube 2 form a backward light path.

On one hand, the blue visible light is sensitive to the response of smoke particles in the early stage of a fire and open fire with the particle size smaller than 0.4 mu m, the infrared light is sensitive to the response of grey smoke generated by smoldering of wood and cotton ropes, the sensitivity of the blue visible light and the infrared light can be considered at the same time, the fire hazard can be found very early in the early stage of the fire, and the accuracy and the stability of fire detection are improved; on the other hand, the receiving tube 2 receives two groups of backward light, so that the light intensity is improved, and the response capability to smoke is improved by the accumulation of two receiving signals.

In this embodiment, the optical axis of the integrated transmitting tube 1 and the optical axis of the receiving tube 2 intersect at the center of the labyrinth measuring cavity 3, the distances from the integrated transmitting tube 1 and the receiving tube 2 to the center of the labyrinth measuring cavity 3 are equal, and the center of the labyrinth measuring cavity 3 is located above the installation positions of the integrated transmitting tube 1 and the receiving tube 2; the signal received by the receiving tube 2 is more convenient to process due to the regular design.

In other embodiments, as shown in fig. 2, the centers of the integral emission tube 1, the receiving tube 2 and the labyrinth measuring cavity 3 may all be in the same horizontal plane, and in order to reduce the interference phenomenon of non-smoke scattered light, a light shielding plate 5 is disposed between the integral emission tube 1 and the receiving tube 2.

The labyrinth measuring cavity 3 is enclosed by a labyrinth base 31 and a labyrinth cover 32, and the labyrinth base 31 is provided with a circuit board and an optical seat 4 which is respectively used for installing the integrated transmitting tube 1 and the receiving tube 2; the integrated transmitting tube 1 and the receiving tube 2 are arranged on one side of the circuit board, so that interference of received signals can be reduced.

In order to prevent dust and insects from falling into the labyrinth measuring chamber 3, a protective net is arranged on the labyrinth cover 32, and the mesh size of the protective net is not more than 1 mm.

The integrated emission tube 1 is controlled by separate control switches to emit infrared light and blue visible light respectively; specifically, the integral type emission tube 1 possesses three pins, makes the integral type emission tube 1 independently send out blue visible light, independently send out infrared light and send out three kinds of light of mixed light through controlling three pins, adjusts the use as required.

In order to meet the requirements of different installation places, lenses are installed at the front ends of the integrated transmitting tube 1 and the receiving tube 2.

In order to shield the external electromagnetic interference, a shielding cover is installed on the receiving pipe 2.

The working principle is as follows:

the combination of blue visible light and infrared light gives consideration to the sensitivity to white smoke with larger particle size and black smoke with smaller particle size, and improves the accuracy and stability of fire detection.

When the integrated transmitting tube 1 independently transmits blue visible light, the radiation power received by the receiving tube 2 is P_BWhen the integrated transmitting tube 1 independently transmits infrared light, the radiation power received by the receiving tube 2 is P_RAccording to P_BAnd P_RThe ratio of (a) to (b) determines whether there is smoke and what type of smoke, and thus distinguishes between fire and non-fire smoke particles. During normal work, control integral type transmitting tube 1 interval ground emission blue visible light and infrared light, then calculate the radiant power ratio, when judging that there is smog (non-conflagration, like water smoke, dust etc.) really to exist, control integral type transmitting tube 1 sends the mixed light of blue visible light and infrared light, and the radiant power that receiving tube 2 received can superpose, and the current signal reinforcing of output, and then improves the balanced response to various smog, eliminates non-fire alarm misinformation phenomena such as water smoke, dust.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (10)

1. A vertical backward smoke detector maze of infrared light and blue light combination which is characterized in that: measure the chamber and locate including the labyrinth integral type transmitting tube and the receiver tube in the labyrinth measurement intracavity, integral type transmitting tube transmission infrared light sum blue visible light, the optical axis of integral type transmitting tube with contained angle between the optical axis of receiver tube is the acute angle, thereby the integral type transmitting tube with the receiver tube constitutes the backward light path.

2. The combined infrared and blue light vertical backward smoke detector labyrinth according to claim 1, characterized in that: and an included angle between the optical axis of the integrated transmitting tube and the optical axis of the receiving tube is 10-90 degrees.

3. The combined infrared and blue light vertical backward smoke detector labyrinth according to claim 1 or 2, characterized in that: a light screen is arranged between the integrated transmitting tube and the receiving tube.

4. The combined infrared and blue light vertical backward smoke detector labyrinth according to claim 3, characterized in that: and the receiving pipe is provided with a shielding cover.

5. The combined infrared and blue light vertical backward smoke detector labyrinth according to any of claims 1, 2 or 4, characterized in that: and the optical axis of the integrated transmitting tube and the optical axis of the receiving tube are intersected at the center of the labyrinth measuring cavity.

6. The combined infrared and blue light vertical backward smoke detector labyrinth according to claim 5, characterized in that: the integral type launching tube with the receiving tube to the maze measures the distance of chamber center and equals, the center in maze measures the chamber the top of the mounted position of integral type launching tube with the receiving tube.

7. The infrared and blue light combined vertical backward smoke detector labyrinth according to claim 6, characterized in that said labyrinth measuring cavity is enclosed by a labyrinth base and a labyrinth cover, said labyrinth base is provided with a circuit board and a light seat for mounting said integral emission tube and said receiving tube respectively.

8. The infrared and blue light combined vertical backward smoke detector labyrinth according to claim 7, characterized in that a protective net is arranged on the labyrinth cover, and the mesh size of the protective net is not more than 1 mm.

9. The combined infrared and blue light vertical backward smoke detector maze of claim 1, 2, 4, 6, 7, or 8, wherein: the integrated emission tube is controlled by separate control switches to emit infrared light and blue visible light respectively.

10. The combined infrared and blue light vertical backward smoke detector labyrinth according to claim 9, characterized in that: and lenses are arranged at the front ends of the integrated transmitting tube and the receiving tube.