Pyrolysis particle sensor with long service life

Abstract

The pyrolysis particle sensor comprises a shell, an air inlet is formed in one side of the bottom end of the shell, a lower detection cavity is formed in one side of the bottom in the shell, an upper detection cavity is formed in one side of the top in the shell, and a temperature and humidity detector is fixedly installed at the bottom of one side of the inner wall of the lower detection cavity; a compound detector is fixedly mounted in the middle of one side of the inner wall of the lower detection cavity, a heating resistor is fixedly mounted at the top of one side of the inner wall of the lower detection cavity, a laser transmitter is fixedly mounted at one end of one side of the inner wall of the upper detection cavity, and a photoelectric detector is fixedly mounted at the other end of one side of the inner wall of the upper detection cavity; according to the pyrolytic particle sensor with the long service life, disclosed by the utility model, a plurality of index parameters in fire development are detected by the sensor, so that rapid response to pyrolytic particles is achieved, a fire can be found in an early stage of fire development, and the pyrolytic particle sensor can be applied to fire early warning scenes with high requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of fire detection, in particular to a long-life pyrolysis particle sensor. Background Technique

[0002] Fire detection is a system that monitors and identifies fire risks through technical means and promptly responds and notifies relevant personnel.

[0003] However, the existing fire detection methods have the following disadvantages:

[0004] (1) Existing fire alarms rely on smoke alarms. There are mainly two principles for smoke alarms. One is the ion sensor, and the other is the photoelectric sensor. However, both of these solutions require a large amount of smoke to trigger the alarm, and the aerodynamic diameter of the smoke particles required is in a relatively large range, so the alarm is often not timely enough.

[0005] (2) Existing fire detection sensors often set up fans to flow air for detection. However, the fan is a mechanical moving structure with a lifespan of about 3 to 5 years, resulting in a low overall lifespan of the product and poor environmental resistance of the product. Content of the Utility Model

[0006] The purpose of the utility model is to provide a long-life pyrolysis particle sensor to solve the existing problems mentioned in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A long-life pyrolysis particle sensor, including a housing. One side of the bottom end of the housing is provided with an air inlet. One side of the bottom inside the housing is provided with a lower detection cavity. One side of the top inside the housing is provided with an upper detection cavity. The bottom of one side of the inner wall of the lower detection cavity is fixedly installed with a temperature and humidity detector. The middle of one side of the inner wall of the lower detection cavity is fixedly installed with a compound detector. The top of one side of the inner wall of the lower detection cavity is fixedly installed with a heating resistor. One end of one side of the inner wall of the upper detection cavity is fixedly installed with a laser emitter. The other end of one side of the inner wall of the upper detection cavity is fixedly installed with a photoelectric detector. One side of the top end of the housing is provided with an air outlet.

[0008] When using a long-life pyrolysis particle sensor of this technical solution, the sensor detects multiple index parameters during the development of a fire to achieve a rapid response to pyrolysis particles, can detect a fire in the early stage of fire development, and can be applied to fire warning scenarios with high requirements.

[0009] As a preferred technical solution of the utility model, one side of the bottom of the front of the housing is fixedly connected with a connector interface. The connector interface plays an electrical connection role.

[0010] As a preferred technical solution of the present utility model, the housing includes a front shell and a rear shell, and the rear shell is fixedly installed on the back of the front shell by bolts. The front shell and the rear shell can be disassembled for the maintenance of internal components.

[0011] As a preferred technical solution of the present utility model, convex strips are fixedly connected to both sides of the rear shell, and mounting holes are provided at the top and bottom of the convex strips. The mounting holes on the convex strips are used for fixedly installing the sensor.

[0012] As a preferred technical solution of the present utility model, the temperature and humidity detector, the compound detector, and the photoelectric detector are electrically connected to an external upper computer.

[0013] As a preferred technical solution of the present utility model, a fluorescent sticker is attached to the top of the front of the housing. The fluorescent sticker is provided to quickly find the position of the sensor in dim light.

[0014] As a preferred technical solution of the present utility model, a fireproof coating is applied to the surface of the housing. The fireproof coating is provided to improve the high-temperature resistance and flame retardancy of the sensor.

[0015] As a preferred technical solution of the present utility model, a wear-resistant coating is applied to the surface of the fireproof coating. The provided wear-resistant coating makes the surface of the sensor housing not easily worn.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] 1. By detecting multiple index parameters during the development of a fire, the sensor can achieve a rapid response to pyrolysis particles, can detect a fire in the early stage of the fire development, and can be applied to fire warning scenarios with high requirements;

[0018] 2. The sensor drives the surrounding air flow to diffuse upward through the heating resistor for detection. After replacing the fan with the heating resistor, the mechanical movement structure is removed, effectively increasing the overall life of the product and making the product more resistant to the environment. Description of the Drawings

[0019] Figure 1 is a three-dimensional view of the present utility model;

[0020] Figure 2 is a cross-sectional view of the present utility model;

[0021] Figure 3 is a partial cross-sectional view of the housing of the present utility model;

[0022] Figure 4 is a circuit diagram of the present utility model;

[0023] Figure 5This is the software schematic diagram of the present utility model.

[0024] In the figure: 1. Outer shell; 101. Front shell; 102. Rear shell; 2. Air inlet; 3. Temperature and humidity detector; 4. Compound detector; 5. Heating resistor; 6. Laser emitter; 7. Photoelectric detector; 8. Air outlet; 9. Rib; 10. Mounting hole; 11. Lower detection cavity; 12. Upper detection cavity; 13. Connector interface; 14. Fluorescent sticker; 15. Fireproof coating; 16. Wear-resistant coating. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-5 , the present utility model provides a long-life pyrolysis particle sensor, including an outer shell 1. An air inlet 2 is provided on one side of the bottom end of the outer shell 1. A lower detection cavity 11 is provided on one side of the inner bottom of the outer shell 1. An upper detection cavity 12 is provided on one side of the inner top of the outer shell 1. A temperature and humidity detector 3 is fixedly installed at the bottom of one side of the inner wall of the lower detection cavity 11. A compound detector 4 is fixedly installed in the middle of one side of the inner wall of the lower detection cavity 11. A heating resistor 5 is fixedly installed at the top of one side of the inner wall of the lower detection cavity 11 for diffusing air flow. A laser emitter 6 is fixedly installed at one end of one side of the inner wall of the upper detection cavity 12. A photoelectric detector 7 is fixedly installed at the other end of one side of the inner wall of the upper detection cavity 12 for detection. An air outlet 8 is provided on one side of the top end of the outer shell 1 for air circulation.

[0027] During use, by installing a heating resistor 5 at an appropriate temperature in the air duct of the sensor, when the sensor starts to work, the heating resistor 5 generates heat, driving the surrounding air flow to diffuse upward. The air flow enters from the air inlet 2 at the lower part of the sensor. The air entering the sensor passes through the temperature and humidity detector 3, the compound detector 4, and the photoelectric detector 7 in sequence, so as to detect the temperature and humidity, compound components, and solid particle components in the air. Finally, the air is discharged from the air outlet 8 at the upper part of the sensor. After analyzing the contents of several components, the sensor compares with the air in the normal state and finally outputs the content of pyrolysis particles in the air.

[0028] One side of the bottom of the front of the housing 1 is fixedly connected with a connector interface 13 for electrical connection. The temperature and humidity detector 3, the compound detector 4, and the photoelectric detector 7 are electrically connected to an external upper computer. The surface of the housing 1 is coated with a fireproof coating 15, and the surface of the fireproof coating 15 is coated with a wear-resistant coating 16 to improve the protection performance.

[0029] During use, the connector interface 13 on the sensor plays a role in electrical connection. The silicone rubber coating on the sensor housing 1 can improve the high-temperature resistance and flame retardancy performance, and the polytetrafluoroethylene wear-resistant coating 16 on the surface has better wear resistance, which can extend the service life.

[0030] The housing 1 includes a front shell 101 and a rear shell 102. The rear shell 102 is fixedly installed on the back of the front shell 101 through bolts and can be disassembled. Convex strips 9 are fixedly connected to both sides of the rear shell 102. Installation holes 10 are opened at the top and bottom of the convex strips 9 for installation. A fluorescent sticker 14 is attached to the top of the front of the housing 1 to facilitate the identification of the position.

[0031] During use, the sensor is installed in the fire alarm device by using fasteners in the installation holes 10 on the convex strips 9. The set fluorescent sticker 14 facilitates quickly finding the position of the sensor during maintenance in dim light, and the housing 1 of the sensor can be disassembled to facilitate the inspection and replacement of internal components.

[0032] In specific use, for a long-life pyrolysis particle sensor of the present utility model, a heating resistor 5 at an appropriate temperature is installed at the air duct of the sensor. When the sensor starts to work, the heating resistor 5 generates heat, driving the surrounding air flow to diffuse upward. The air flow at the lower air inlet 2 of the sensor enters. The air entering the sensor passes through the temperature and humidity detector 3, the compound detector 4, and the photoelectric detector 7 in sequence, so as to detect the temperature and humidity, compound components, and solid particle components in the air. Finally, the air is discharged from the upper air outlet 8 of the sensor. After analyzing the contents of several components, the sensor compares with the air in the normal state and finally outputs the content of pyrolysis particles in the air. After replacing the fan with the heating resistor 5, the mechanical movement structure is removed, effectively increasing the overall life of the product and making the product more resistant to the environment. This sensor detects suspended particulate matter based on the laser principle, with a wider detection range, capable of detecting extremely small particles invisible to the human eye in the air, and more sensitively distinguishing the tiny particles released by high-temperature pyrolysis; the sensor can detect volatile organic compounds, covering a variety of compound components that can diffuse in the air, avoiding false alarms caused by the sensor detecting fire from a single dimension; the sensor determines whether the sampled gas contains high-temperature particles after pyrolysis and combustion by detecting the thermal energy change of the air flow flowing through the air duct, comprehensively collects and optimizes the data through its own algorithm, and comprehensively analyzes the entire environmental change situation to achieve accurate early warning of fire and the pre-fire stage. The sensor filters and amplifies the multiple collected parameters to obtain an electrical signal that can be processed by the MCU, uses an algorithm to screen and compare multiple data, and combines the parameters of the normal environment to analyze and process abnormal situations, and finally outputs the fire warning index.

[0033] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A long-life pyrolytic particle sensor, comprising a housing (1), characterized in that: An air inlet (2) is provided on one side of the bottom end of the shell (1), a lower detection chamber (11) is provided on one side of the bottom inside the shell (1), an upper detection chamber (12) is provided on one side of the top inside the shell (1), a temperature and humidity detector (3) is fixedly mounted on the bottom of one side of the inner wall of the lower detection chamber (11), a compound detector (4) is fixedly mounted on the middle of one side of the inner wall of the lower detection chamber (11), a heating resistor (5) is fixedly mounted on the top of one side of the inner wall of the lower detection chamber (11), a laser emitter (6) is fixedly mounted on one end of one side of the inner wall of the upper detection chamber (12), a photoelectric detector (7) is fixedly mounted on the other end of one side of the inner wall of the upper detection chamber (12), and an air outlet (8) is provided on one side of the top end of the shell (1).

2. A long-life pyrolytic particle sensor according to claim 1, characterized in that: A connector interface (13) is fixedly connected to one side of the bottom of the front side of the housing (1).

3. A long-life pyrolytic particle sensor according to claim 1, characterized in that: The housing (1) comprises a front housing (101) and a rear housing (102), and the rear side of the front housing (101) is fixedly mounted with bolts to the rear side of the front housing (101).

4. A long-life pyrolytic particle sensor according to claim 3, characterized in that: Both sides of the rear shell (102) are fixedly connected with convex strips (9), and the top and bottom of the convex strips (9) are provided with mounting holes (10).

5. The long-life pyrolytic particle sensor according to claim 1, characterized in that: The temperature and humidity detector (3), the compound detector (4) and the photoelectric detector (7) are electrically connected to an external host computer.

6. A long-life pyrolytic particle sensor according to claim 1, characterized in that: A fluorescent sticker (14) is attached to the top of the front side of the housing (1).

7. The long-life pyrolytic particle sensor according to claim 1, characterized in that: The surface of the housing (1) is coated with a fireproof coating (15).

8. A long-life pyrolytic particle sensor according to claim 7, characterized in that: The surface of the fireproof coating (15) is coated with a wear-resistant coating (16).

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