Miniature axial flow type ambient air detection equipment

Abstract

Miniature axial flow type ambient air detection equipment comprises an outer shell, a fixing plate is arranged in the outer shell, a particulate matter sensor module is installed on the side face of the fixing plate, and a turbofan and an axial flow fan are installed in an inner cavity of the outer shell; a controller is installed in the middle of the outer shell, a control port of the controller is connected with the turbofan and the axial flow fan through a control circuit, and the signal output end of the particulate matter sensor module is connected with the signal input end of the controller. A POE connector is installed at the tail end of the outer shell. An end cover is arranged at the front end of the outer shell, an air inlet is formed in the surface of the end cover, and multiple air outlets are formed in the lower surface of the outer shell. According to the utility model, the defects in the prior art are overcome, negative pressure is generated at the front end of the inner cavity of the outer shell through the axial flow fan, PM in external air can be captured into the inner cavity, and a more reliable microscopic negative pressure environment can be maintained in the inner cavity of the outer shell through the turbofan; therefore, the captured air can be measured through the particulate matter sensor module.

Description

Technical Field

[0001] The utility model relates to the technical field of air quality detection, in particular to a micro axial flow type environmental air detection device. Background Art

[0002] With the continuous improvement of people's living standards, according to policy requirements, the demand for environmental monitoring equipment remains strong. After a period of market testing, the basic technology of air pollution monitoring equipment has gradually matured and is about to enter a stage of technology upgrading and equipment optimization.

[0003] In the prior art, most of the ambient air detection equipment still uses traditional manual monitoring, and most of the traditional manual monitoring results are presented in the form of averages. Traditional manual monitoring uses a diffusion gas detector to detect the air in the detection area. Generally, the gas flow in an open environment is relatively large, and the detection of a diffusion gas detector is not very accurate. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a micro axial flow ambient air detection device, which overcomes the deficiencies of the prior art. A negative pressure is generated at the front end of the inner cavity of the outer shell by an axial flow fan, so that PM. / PM in the external air can be captured into the inner cavity. In addition, a turbo fan can be used to ensure that a more reliable microscopic negative pressure environment is maintained at the air inlet at the front end of the outer shell; thereby, the captured air can be measured by the particle sensor module at the air inlet at the front end of the outer shell.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A miniature axial flow ambient air detection device comprises an outer shell, a fixing plate is arranged inside the outer shell, a particle sensor module is installed on the side of the fixing plate, a turbo fan and an axial flow fan are installed in the middle of the inner cavity of the outer shell; a controller is installed in the middle of the outer shell, a control port of the controller is connected to the turbo fan and the axial flow fan through a control circuit, a signal output end of the particle sensor module is connected to a signal input end of the controller, and the controller is connected to a terminal signal through a network communication module; a POE connector is installed at the rear end of the outer shell, the POE connector is connected to the controller through a power supply circuit, and is used to supply power to the particle sensor module, the turbo fan and the axial flow fan;

[0007] An end cover is arranged at the rear end of the outer shell, an air outlet is opened on the surface of the end cover, a plurality of air inlets are arranged on the lower surface of the outer shell, and the particle sensor module, the turbo fan and the axial flow fan are all arranged close to the air inlets.

[0008] Preferably, a groove is provided in the middle of the lower outer surface of the outer shell, a fish fin is provided on the upper surface of the outer shell, a bracket is fixedly sleeved on the outer surface of the outer shell, the bracket is clamped in the groove, and the upper end of the bracket is fixedly connected to the fish fin by bolts.

[0009] Preferably, the outer shell comprises an upper shell and a lower shell, the upper shell and the lower shell are fixed by a snap connection, a bottom cover is provided at the bottom end of the lower shell, and a strip-shaped air outlet is provided on the surface of the bottom cover.

[0010] Preferably, the outer shell is configured as a spindle-shaped shell.

[0011] The utility model provides a micro axial flow type ambient air detection device. It has the following beneficial effects: by controlling the turbo fan and the axial flow fan to open, the axial flow fan can be used to generate negative pressure at the front end of the inner cavity of the outer shell, so that PM. / PM in the external air can be captured and brought into the inner cavity. In addition, through the action of the turbo fan, it can be ensured that a more reliable microscopic negative pressure environment can be maintained at the air inlet at the front end of the outer shell; thus, the captured air can be measured by the particle sensor module in the inner cavity of the outer shell. And by adopting an axial flow structure and cooperating with a bottom-in and back-out sampling design, when the appropriate inner cavity negative pressure is controlled, the suspension speed of the water droplets is greater than the sampling flow rate generated by the negative pressure, thereby effectively avoiding interference from rainy water droplets without adding a heating and dehumidification device, thereby improving equipment reliability and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0013] Figure 1 A schematic diagram of the structure of the utility model;

[0014] Figure 2 A schematic diagram of the structure of the outer shell of the utility model;

[0015] Description of the numbers in the figure:

[0016] 1. Outer shell; 2. Fixing plate; 3. Particle sensor module; 4. Turbofan; 5. Axial fan; 6. Controller; 7. POE connector; 8. End cover; 9. Air outlet; 10. Air inlet; 11. Fin; 12. Bracket; 13. Upper shell; 14. Lower shell; 15. Bottom cover; 16. Groove. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0018] Embodiment 1, as Figure 1 to Figure 2 As shown, a miniature axial flow ambient air detection device comprises an outer shell 1, a fixing plate 2 is arranged inside the outer shell 1, a particle sensor module 3 is installed on the side of the fixing plate 2, a turbo fan 4 and an axial flow fan 5 are installed in the middle of the inner cavity of the outer shell 1; a controller 6 is installed in the middle of the outer shell 1, a control port of the controller 6 is connected to the turbo fan 4 and the axial flow fan 5 through a control circuit, a signal output end of the particle sensor module 3 is connected to a signal input end of the controller 6, and the controller 6 is connected to a terminal signal through a network communication module; a POE connector 7 is installed at the rear end of the outer shell 1, the POE connector 7 is connected to the controller 6 through a power supply circuit, and power supply communication between an external power supply and the controller 6 is realized through the POE connector 7, so as to supply power to the particle sensor module 3, the turbo fan 4 and the axial flow fan 5;

[0019] An end cover 8 is provided at the rear end of the outer shell 1 , an air outlet 9 is opened on the surface of the end cover 8 , a plurality of air inlets 10 are provided on the lower surface of the outer shell 1 , and the particle sensor module 3 , the turbo fan 4 and the axial flow fan 5 are all arranged close to the air inlets 10 .

[0020] Working principle:

[0021] When in use, by controlling the turbofan 4 and the axial flow fan 5 to turn on, the axial flow fan 5 can be used to generate negative pressure in the inner cavity of the outer shell 1, so that PM2.5 / PM10 in the external air can be captured and brought into the inner cavity. In addition, through the action of the turbofan 4, it can be ensured that a more reliable microscopic negative pressure environment can be maintained at the air inlet 10 of the outer shell 1; thus, the captured air can be measured by the particle sensor module 3 in the inner cavity of the outer shell 1. In addition, by adopting an axial flow structure and coordinating a bottom-in and back-out sampling design, when the appropriate inner cavity negative pressure is controlled, the suspension speed of water droplets is greater than the sampling flow rate generated by the negative pressure, thereby effectively avoiding interference from rainy water droplets without adding a heating and dehumidification device, thereby improving equipment reliability and maintenance efficiency.

[0022] During the measurement process, PM2.5 and PM10 are measured by the laser principle. The basic principle is that the laser module generates a specific laser beam. When particles pass through, their signals will be detected by the ultra-high sensitive digital circuit module. The particle count and particle size are obtained by intelligent identification and analysis of the signal data, and the mass concentration is obtained according to professional calibration technology. After the measurement is completed, the measurement data can be transmitted to the terminal through the communication module in the controller 6.

[0023] Embodiment 2, as a further preferred solution of embodiment 1, the outer shell 1 includes an upper shell 13 and a lower shell 14, the upper shell 13 and the lower shell 14 are fixed by snap connection, and a bottom cover 15 is provided at the bottom end of the lower shell 14, and a strip-shaped air outlet is provided on the surface of the bottom cover 15. Therefore, when repairing and maintaining the various parts in the inner cavity of the outer shell 1, the upper shell 13 and the lower shell 14 can be directly disassembled, and the various parts in the inner cavity of the outer shell 1 can be repaired and maintained. After the repair and maintenance is completed, the upper shell 13 and the lower shell 14 can be directly fixed by snap connection, and the whole process is convenient and quick.

[0024] Embodiment 3, as a further preferred solution of embodiment 2, a groove 16 is provided at the middle of the lower outer surface of the outer shell 1, a fish fin 11 is provided on the upper surface of the outer shell 1, a hanger 12 is fixedly sleeved on the outer surface of the outer shell 1, the hanger 12 is clamped in the groove 16, and the upper end of the hanger 12 is fixedly connected to the fish fin 11 by bolts. The hanger 12 can strengthen the fixation between the upper shell 13 and the lower shell 14, and the upper end of the hanger 12 is connected to the fish fin 11 by bolts, so it is also convenient to hang the entire outer shell 1 in a relatively open environment.

[0025] Embodiment 4, as a further preferred solution of embodiment 2, the outer shell 1 is configured as a spindle-shaped shell, thereby effectively reducing the problem of high-altitude wind resistance.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A miniature axial flow ambient air detection device, characterized in that: The invention comprises an outer shell (1), wherein a fixing plate (2) is arranged inside the outer shell (1), a particle sensor module (3) is installed on the side of the fixing plate (2), and a turbofan (4) and an axial flow fan (5) are installed in the middle of the inner cavity of the outer shell (1); a controller (6) is installed in the middle of the outer shell (1), a control port of the controller (6) is connected to the turbofan (4) and the axial flow fan (5) through a control circuit, a signal output end of the particle sensor module (3) is connected to a signal input end of the controller (6), and the controller (6) is connected to a terminal signal through a network communication module; a POE connector (7) is installed at the rear end of the outer shell (1), and the POE connector (7) is connected to the controller (6) through a power supply circuit, and is used to supply power to the particle sensor module (3), the turbofan (4) and the axial flow fan (5); An end cover (8) is provided at the rear end of the outer shell (1), an air outlet (9) is provided on the surface of the end cover (8), a plurality of air inlets (10) are provided on the lower surface of the outer shell (1), and the particle sensor module (3), the turbo fan (4) and the axial flow fan (5) are all arranged close to the air inlets (10).

2. A micro axial flow ambient air detection device according to claim 1, characterized in that: A groove (16) is provided in the middle of the lower portion of the outer surface of the outer shell (1), a fish fin (11) is provided on the upper surface of the outer shell (1), a hanging bracket (12) is fixedly sleeved on the outer surface of the outer shell (1), the hanging bracket (12) is clamped in the groove (16), and the upper end of the hanging bracket (12) is fixedly connected to the fish fin (11) by means of bolts.

3. A micro axial flow ambient air detection device according to claim 1, characterized in that: The outer shell (1) comprises an upper shell (13) and a lower shell (14); the upper shell (13) and the lower shell (14) are fixed by a snap connection; a bottom cover (15) is provided at the bottom end of the lower shell (14); and a strip-shaped air outlet is provided on the surface of the bottom cover (15).

4. A micro axial flow ambient air detection device according to claim 1, characterized in that: The outer shell (1) is configured as a spindle-shaped shell.

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