Air sampling probe with self-cleaning function

Abstract

The utility model discloses an air sampling probe with a self-cleaning function. The air sampling probe with the self-cleaning function comprises a shell, a sensor is installed in the shell, and a self-cleaning mechanism is installed on the shell; the self-cleaning mechanism comprises an annular air duct formed in the shell, a top outlet of the annular air duct surrounds the top of the sensor, an air duct is installed on one side of the shell and communicated with the annular air duct, and a fan is installed in the air duct. According to the air sampling probe with the self-cleaning function provided by the utility model, the shell and the sensor are arranged, and the self-cleaning mechanism comprising the air duct, the fan and the annular air duct is arranged on the shell, so that floating ash on the surface of the sensor can be conveniently cleaned, and the detection precision of the sensor is prevented from being influenced by the floating ash.

Description

Technical Field

[0001] This utility model relates to the field of air sampling probe technology, and in particular to an air sampling probe with self-cleaning function. Background Technology

[0002] Air sampling probes act as the "nerve endings" of human interaction with the atmospheric environment, their core value lying in transforming intangible air quality into quantifiable data. Through the synergy of multi-stage filtration, sensor arrays, and intelligent algorithms, they can accurately capture target substances such as PM2.5, VOCs (volatile organic compounds), and pathogenic microorganisms from complex environments, achieving a detection accuracy of one part per trillion (ppt level). This capability enables humanity to achieve "cellular-level diagnosis" of air pollution for the first time.

[0003] Air sampling probes typically require dust covers or similar protective shields to filter out large particles in the air. However, fine particles can still pass through the dust cover and contaminate the sensor surface of the air sampling probe, potentially leading to decreased sensor sensitivity and less accurate detection.

[0004] Therefore, it is necessary to provide an air sampling probe with a self-cleaning function to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the existing technology, this utility model provides an air sampling probe with self-cleaning function, which can easily clean the floating dust on the sensor surface.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An air sampling probe with self-cleaning function includes: a housing, a sensor installed inside the housing, a self-cleaning mechanism installed on the housing, the self-cleaning mechanism including an annular air duct opened inside the housing, the top outlet of the annular air duct surrounding the top of the sensor, a duct installed on one side of the housing, the duct communicating with the annular air duct, and a fan installed inside the duct.

[0008] Preferably, the outer shell is a double-layer shell.

[0009] Preferably, a flow guide surface is provided on the inner wall of the outer casing.

[0010] Preferably, the housing has a mounting cavity, and the sensor is installed inside the mounting cavity.

[0011] Preferably, a switch is installed on the housing, and the switch is connected to the fan.

[0012] Preferably, a dust filter is installed on the outside of the fan.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) By setting up a housing and a sensor, and setting up a self-cleaning mechanism including a wind duct, a fan and an annular air duct on the housing, the present invention can easily clean the floating dust on the surface of the sensor and prevent the sensor from being affected by floating dust.

[0015] (2) By setting an inwardly bent guide surface on the inner wall of the outer shell, this utility model can guide air to blow towards the sensor and increase the wind speed, which is beneficial to improving the cleaning speed of the sensor.

[0016] (3) This utility model can facilitate the installation and fixation of the sensor by opening an installation cavity inside the outer shell;

[0017] (4) By installing a switch on the outer casing, this utility model can conveniently control the start and stop of the fan manually;

[0018] (5) By installing a dustproof net on the outside of the fan, this utility model can filter the air entering the air duct, which is beneficial to improving the service life of the sensor. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the air sampling probe with self-cleaning function provided by this utility model;

[0020] Figure 2 for Figure 1 A partial structural diagram of an air sampling probe with self-cleaning function is shown.

[0021] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.

[0022] The corresponding names of the attached figures are: 1-shell, 2-air duct, 3-fan, 4-sensor, 5-annular air duct, 6-air inlet / outlet, 7-guide surface, 8-mounting cavity, 9-switch. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0024] Example 1:

[0025] like Figure 1-3As shown, the air sampling probe with self-cleaning function provided by this utility model includes: a housing 1, which is a double-layered housing, with a sensor 4 used by the air sampling probe installed inside the housing 1, and a self-cleaning mechanism installed on the housing 1. The self-cleaning mechanism includes an annular air duct 5 opened inside the housing 1, which is located in the space between the inner and outer layers of the housing 1. The top outlet of the annular air duct 5 surrounds the top of the sensor 4. A wind duct 2 is installed on one side of the housing 1, which is connected to the annular air duct 5. A fan 3 is installed inside the wind duct 2. In use, the housing 1 is installed inside a dustproof guide cover. Large particles in the air are filtered through the dustproof guide cover, and then the air enters the dustproof guide cover. The sensor 4 can detect the air and then send the information to the host. The host analyzes the information and outputs the analysis results. The above process is consistent with the operation process of existing air sampling probes, and its detailed process will not be described here. When the surface of sensor 4 is contaminated with fine particles, potentially affecting its detection accuracy, fan 3 can be activated. Fan 3 blows air into the air duct 2, creating positive pressure that forces the air into the annular air duct 5. This positive pressure then causes the air to exit from the top of the annular air duct 5 and blow towards the surface of sensor 4, expelling surface dust from the sensor 4 through the air inlet 6 at the top of the housing 1, thus achieving self-cleaning of the sensor surface. It is worth noting that fan 3 can be controlled intermittently using a timer or PLC. Furthermore, fan 3 can be reversed to allow air to enter the housing 1 through the air inlet 6. Sensor 4 can then detect the incoming air. Simultaneously, the negative pressure and high-speed airflow within the housing 1 prevent surface dust from easily accumulating on the sensor 4 surface.

[0026] By setting up a housing 1 and a sensor 4, and by setting a self-cleaning mechanism on the housing 1 including a wind duct 2, a fan 3 and an annular air duct 5, the surface dust of the sensor 4 can be easily cleaned, preventing the sensor 4 from being affected by the surface dust.

[0027] Example 2:

[0028] like Figure 3 As shown, in this embodiment, a guide surface 7 is provided on the inner wall of the outer casing 1. The guide surface 7 is located at the top air outlet of the annular air duct 5. The top of the guide surface 7 tapers inward and smoothly transitions to the air inlet / outlet 6. In use, when the air blown out by the annular air duct 5 blows onto the guide surface 7, it is guided by the guide surface 7, causing the airflow to turn inward, thereby blowing the air toward the surface of the sensor 4. Furthermore, due to the inward bending of the guide surface 4, the distance between the sensor 4 and the inner wall of the outer casing 1 is reduced, thereby increasing the airflow speed and making it easier to blow away the floating dust on the surface of the sensor 4, which is beneficial to improving the cleaning speed.

[0029] By providing an inwardly bent airflow guide surface 7 on the inner wall of the housing 1, air can be guided towards the sensor 4 and the wind speed can be increased, which is beneficial to improving the cleaning speed of the sensor 4.

[0030] Example 3:

[0031] like Figure 2 As shown, in this embodiment, an installation cavity 8 is provided inside the housing 1, and the sensor 4 is fixedly installed inside the installation cavity 8, with its data cable extending from the tail of the housing 1.

[0032] By opening an installation cavity 8 inside the housing 1, the sensor 4 can be easily installed and fixed.

[0033] Example 4:

[0034] like Figure 2 As shown, in this embodiment, a switch 9 is installed on the housing 1. The switch 9 is connected to the fan 3, which can manually start and stop the air fan 3. This structural design is suitable for handheld air detection devices. When in use, the housing is held to sample and detect the air. When it is necessary to clean the dust on the surface of the sensor 4, the switch 9 can be pressed manually to power on the fan 9 and start it, thereby cleaning the dust on the surface of the sensor 4.

[0035] By installing switch 9 on the housing 1, the start and stop of fan 3 can be easily controlled manually.

[0036] Example 5:

[0037] In this embodiment, a dust filter is installed on the outside of the fan 3. The dust filter uses different specifications depending on the usage environment and can filter dust in the air. When the fan 3 is turned on, the outside air enters the air duct 2 after being filtered by the dust filter. This prevents large dust particles from re-entering the annular air duct 5 and avoids large dust particles from impacting the sensor 4 at high speed, which would accelerate the wear of the sensor 4 or even damage it, thereby effectively extending the service life of the sensor 4.

[0038] By installing a dust filter on the outside of the fan 3, the air entering the air duct 2 can be filtered, which helps to improve the service life of the sensor 4.

[0039] Working principle: When in use, if the surface of sensor 4 is contaminated by fine particles, which may affect its detection accuracy, the fan 3 can be started. When the fan 3 starts, it blows air into the air duct 2. The positive pressure of the air in the air duct 2 causes the air to enter the annular air duct 5. The positive pressure of the air in the annular air duct 5 causes the air to be blown out from the top of the annular air duct 5 and blown towards the surface of sensor 4. The floating dust on the surface of sensor 4 is blown out from the air inlet 6 at the top of the outer shell 1, realizing the self-cleaning operation of the sensor surface.

[0040] Alternatively, by controlling the fan 3 to reverse, air can be introduced into the housing 1 through the air inlet 6. The sensor 4 can detect the incoming air. At the same time, due to the negative pressure inside the housing 1 and the high-speed airflow, dust is less likely to remain on the surface of the sensor 4, which can effectively reduce the possibility of the sensor 4 being covered by dust.

Claims

1. An air sampling probe with self-cleaning function, characterized in that, include: A housing (1) is provided, a sensor (4) is installed inside the housing (1), and a self-cleaning mechanism is installed on the housing (1). The self-cleaning mechanism includes an annular air duct (5) opened inside the housing (1), the top outlet of the annular air duct (5) surrounds the top of the sensor (4), a duct (2) is installed on one side of the housing (1), the duct (2) is connected to the annular air duct (5), and a fan (3) is installed inside the duct (2).

2. The air sampling probe with self-cleaning function according to claim 1, characterized in that, The outer shell (1) is a double-layer shell.

3. The air sampling probe with self-cleaning function according to claim 1, characterized in that, A flow guide surface (7) is provided on the inner wall of the outer shell (1).

4. The air sampling probe with self-cleaning function according to claim 1, characterized in that, The housing (1) has an installation cavity (8) inside, and the sensor (4) is installed in the installation cavity (8).

5. The air sampling probe with self-cleaning function according to claim 1, characterized in that, A switch (9) is installed on the housing (1), and the switch (9) is connected to the fan (3).

6. The air sampling probe with self-cleaning function according to claim 1, characterized in that, A dustproof net is installed on the outside of the fan (3).

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