TWM468349U - Front dust separator for air sampling - Google Patents

Description

Front dust separator for air sampling

This creation is about a front dust separator, especially a dust separator that can improve the service life and accurately detect the clogging of the sampling line.

Referring to the first figure, the air sampling device 1 is generally a device that detects or monitors the concentration change of a particular substance or component in the air of a protected area 15 as a substance or component. When the content exceeds a certain value, the air sampling device 1 can issue an alarm, such as an Air Sampling Smoke Detector for early fire warning or a carbon monoxide detector for preventing poisoning. The air sampling device 1 is generally connected to the protected area 15 through a sampling line 14. In operation, the air suction device 11 in the air sampling device 1 such as a fan can extract the air sample in the protected area 15. And passing the air sample through a filtering device 12 to filter out the larger dust particles, and then pushing the air sample to a detecting unit 13 for detection. Taking the smoke detector as an example, the detecting unit 13 generally includes a light-emitting element and a light-receiving element (or light-detecting element), which utilizes the principle that the concentration of the smoke affects the light-receiving element receiving the light-emitting element signal to perform the smoke concentration. Control, the structure and operation principle of the details are well known to those skilled in the art, and will not be described here. In addition, it is worth mentioning that the filtering device 12 can filter out the air sample first. Dust particles (the dust particles are not substances or components to be monitored, so they do not affect The detection accuracy can have the effect of avoiding or reducing the contamination of the detection unit 13 by dust particles.

Referring to the first figure, when the protected area 15 is a poor air quality environment such as a factory, if only the filtering device 12 in the air sampling device 1 is used to filter out dust particles in the air sample, The service life of the filter device 12 is greatly shortened, or the filter device 12 is quickly blocked and the detection is affected. Therefore, a pre-dust filter 2 is disposed on the sampling line 14 at the front end of the air sampling device 1 . The front dust filter 2 is provided with a filter screen 21, whereby the load of the filter device 12 can be alleviated and the service life thereof can be improved. However, the conventional dust filter 2 has the following defects: First, The front dust filter 2 itself also has the problem of easy clogging and reduced service life. Secondly, the air sampling device 1 is usually provided with an air flow sensor for detecting the flow rate of the air sample. In order to monitor whether the sampling line 14 is blocked, if the flow rate measured by the gas detector is too low, it may be impossible to distinguish whether the sampling line 14 itself is blocked or the front dust filter 2 is blocked. In the end, the external dust filter 2 is easily blocked, which has a significant influence on the suction performance of the air suction device 11, so that the sampling line 14 must be appropriately reduced in length during the design phase to compensate for this negative Factors, this will result in limited product usability and inconvenient use, so how to improve the above-mentioned deficiencies, that is, the technical difficulties that the creators of this case want to solve.

In view of the existing dust filter, the service life is shortened due to its easy clogging, and the clogging of the sampling line cannot be correctly detected. Therefore, the purpose of this creation is to develop a sampling line which can be used for an improved life and can be accurately detected. Place the dust separator before clogging.

In order to achieve the above objectives, the author provides a method for air extraction. The front dust separator comprises: a casing, the first flow channel and the second flow channel are respectively disposed inside the casing, and the sampling channel is connected between the second flow channel and the first flow channel Connected to each other, the casing is respectively provided with an air sample inlet and a dust particle discharge port at the front end and the end of the first flow channel; a fan, the fan is disposed in the first flow channel; a gas flu detector, the gas flu test The device is disposed in the first flow channel, and the gas flu detector is located between the air sample inlet and the fan; and a filtering device is disposed in the second flow channel.

By providing a fan in the first flow channel and a dust particle discharge port at the end of the first flow path, the dust particles in the air sample can be effectively discharged, and the burden of the filter device can be greatly reduced to avoid Blocking, and the gas flu detector is provided by the creation, and the gas flu detector is located in front of the filtering device, and the sputum can accurately detect whether the sampling pipeline is blocked, thereby enabling the creation to improve product life and convenience. efficacy.

[Use]

1‧‧‧Air sampling device

11‧‧‧ suction device

12‧‧‧Filter device

13‧‧‧Detection unit

14‧‧‧Sampling line

15‧‧‧protected area

2‧‧‧Pre-dust filter

21‧‧‧ Filter

[this creation]

3‧‧‧Shell

31‧‧‧ Air sample entrance

32‧‧‧Air sample export

33‧‧‧Dust particle discharge

34‧‧‧First runner

341‧‧‧ front end area

342‧‧‧ Backend area

35‧‧‧Second runner

36‧‧‧Sampling port

4‧‧‧Fan

5‧‧‧Filter device

51‧‧‧ coarse filter

52‧‧‧ Medium filter

53‧‧‧ fine filter

6‧‧‧ gas flu detector

7‧‧‧protected area

71‧‧‧Sampling line

8‧‧‧Air sampling device

81‧‧‧Sampling line

82‧‧‧ suction device

83‧‧‧Filter device

84‧‧‧Detection unit

P1‧‧‧ dust particles

P2‧‧‧ side to side

The first picture is a schematic diagram of the action taken.

The second picture is a schematic diagram of the creation.

The third figure is a schematic diagram of the second embodiment of the present creation.

The fourth picture is a schematic diagram of the action of the creation combined with the air sampling device and the sampling pipeline.

Referring to the second figure, the present invention provides a front dust separator for air sampling, comprising: a casing 3, the casing 3 internally separating a first flow passage through which air samples can pass. 34 and a second flow channel 35, the second flow channel 35 is located on the side of the first flow channel 34, and the The second flow path 35 is connected to the first flow path 34 through a sampling port 36. The housing 3 is provided with an air sample inlet 31 at the front end of the first flow path 34. The housing 3 is disposed at the end of the first flow path 34. There is a dust particle discharge port 33, and the casing 3 is provided with an air sample outlet 32 on the side of the second flow path 35, and the sampling port 36 is located between the air sample inlet 31 and the dust particle discharge port 33. Please refer to the fourth figure, the air sample inlet 31 is connected to a sample line 71 of a protected area 7, and the air sample outlet 32 is available to the sampling line 81 of an air sampling device 8. In connection with the above, the connection between the sampling line 71 and the sampling line 81 of the air sampling device 8 is actually the same as that of the prior art (prior art), and in addition, please refer to the third figure, in other feasible implementations. For example, the shape of the first flow path 34 may be linear, which may have the advantage of simple structure; in the embodiment, the first flow path 34 may have an inverted L shape, that is, the first flow path 34 is still Can further include a front that is closer to the air sample inlet 31 The region 341 is opposite to the rear end region 342 of the air sample inlet 31, and the rear end region 342 is located at the side of the front end region 341, wherein the front end region 341 can be rectangular, and the rear end region 342 can be linear; a fan 4, the fan 4 is disposed in the first flow channel 34 of the housing 3. In the embodiment, the fan 4 is more specifically located in the rear end region 342 of the first flow channel 34; 6. The air flow sensor 6 is disposed in the first flow path 34 of the housing 3, and the air flu detector 6 is located between the air sample inlet 31 and the fan 4, in the present embodiment. For example, the gas flu detector 6 is more specifically located in the front end region 341 of the first flow channel 34, and the fan 4 is located on the side of the gas flu detector 6, and, in addition, please refer to the fourth figure. The gas flu detector 6 can be electrically connected to an external central control terminal or an air sampling device 8 so that the user can know the measured value; a filter device 5 is disposed in the second flow path 35 of the casing 3, and preferably, a filter is further disposed in the filter device 5 according to the difference in the size of the dust particles that can be filtered out. a net 51, a middle screen 52 and a fine screen 53, wherein the coarse screen 51 is closer to the sampling port 36, and the fine screen 53 is closer to the air sample outlet 32, wherein the medium filter 52 is located Between the coarse filter screen 51 and the fine filter screen 53; please refer to the second figure and the fourth figure, and the air sample inlet 31 and the air sample outlet 32 are respectively combined with the external sampling line 71 and the air sampling device. 8 The sampling line 81 is connected to each other. The fan 4 is disposed in the first flow path 34 and the dust flow discharge port 33 is disposed at the end of the first flow path 34. When the air sample passes through the fan 4, the fan 4 can pass through. According to the principle of centrifugal force and gravity (inertia), the larger dust particles P1 in the air sample are directly removed from the dust particle discharge port 33, that is, the creation can avoid or reduce the dust particles that are most likely to cause the filter blockage to enter or pass. The filtering device 5, at the same time, the object to be tested P2 in the air sample The smoke particles or carbon monoxide can still smoothly enter the air sampling device 8 through the filtering device 5 because the particles are small, so that the dust particles P1 in the air sample can be separated from the creation. The purpose of entering and contaminating the air sampling device 8 is.

Referring to the second and fourth figures, the fan 4 is disposed in the first flow path 34 and the dust particle discharge port 33 is disposed at the end of the first flow path 34, so that the air sample can be effectively larger. The dust particles P1 are discharged outside the creation, and the burden of the filtering device 5 can be greatly reduced and the clogging thereof can be greatly reduced. The gas flu detector 6 is provided by the present creation, and for the air sample, the flu detector 6 Before the filter device 5 is located, the gas flu detector 6 can be accurately disturbed by the filter device 5 to accurately detect whether the sampling line 71 is clogged. Finally, the filter device 5 of the present invention can be filtered by dust outside the filter. The device 2 is not easy to block, so the suction inside the air sampling device 8 The suction efficiency of the gas device 82 is less affected, so that the length of the sampling line 71 does not need to be reduced, and the flexibility of deployment and configuration of the device can be improved, thereby enabling the creation of the product to improve the service life and ease of use; In addition, by further providing the coarse filter 51, the middle filter 52 and the fine filter 53 in the filter device 5, better dust filtration performance can be achieved, and the interior of the air sampling device 8 can be more effectively alleviated. The burden of the filtering device 83, while at the same time, can better avoid the contamination of the detecting unit 84, thereby enabling the creation of a better dust separation effect.

3‧‧‧Shell

31‧‧‧ Air sample entrance

32‧‧‧Air sample export

33‧‧‧Dust particle discharge

34‧‧‧First runner

341‧‧‧ front end area

342‧‧‧ Backend area

35‧‧‧Second runner

36‧‧‧Sampling port

4‧‧‧Fan

5‧‧‧Filter device

51‧‧‧ coarse filter

52‧‧‧ Medium filter

53‧‧‧ fine filter

6‧‧‧ gas flu detector

Claims (8)

A front dust separator for air sampling, comprising: a casing, wherein a first flow passage and a second flow passage through which air samples can pass are respectively disposed inside the casing, wherein the second flow passage is located at the second flow passage a first flow channel side, and the second flow channel and the first flow channel are connected through a sampling port, and the housing is provided with an air sample inlet at the front end of the first flow channel, and the housing is disposed at the end of the first flow channel a dust particle discharge port, the casing is provided with an air sample outlet on one side of the second flow channel; a fan disposed in the first flow channel of the casing; and a filtering device disposed on the filter device The housing is in its second flow path. The front dust separator for air sampling according to claim 1, wherein the sampling port is located between the air sample inlet and the dust particle discharge port. A pre-dust separator for air sampling as described in claim 1, wherein the first flow path has a linear shape. The front dust separator for air sampling according to claim 1, wherein the first flow path has an inverted L shape, that is, the first flow path further comprises a front end region closer to the air sample inlet; a rear end region that is further away from the inlet of the air sample, and the rear end region is located on one side of the front end region, wherein the front end region is rectangular, and the rear end region is linear. A front dust separator for air sampling as described in claim 4, wherein the fan is located in a rear end region of the first flow path. The pre-dust separator for air sampling according to claim 1, wherein the filter device is further provided according to the difference in the size of the dust particles to be filtered. a coarse filter mesh, a middle filter mesh and a fine filter mesh, wherein the coarse filter mesh is closer to the sampling port, the fine filter mesh is closer to the air sample outlet, and the middle filter mesh is located at the coarse filter mesh and fine Between the filters. The pre-dust separator for air sampling according to any one of claims 1 to 6, further comprising an air flu detector disposed in the casing The first flow channel is located between the air sample inlet and the fan. A front dust separator for air sampling, comprising: a casing, wherein a first flow passage and a second flow passage through which air samples can pass are respectively disposed inside the casing, wherein the second flow passage is located at the second flow passage a first flow channel side, and the second flow channel and the first flow channel are connected through a sampling port, and the housing is provided with an air sample inlet at the front end of the first flow channel, and the housing is disposed at the end of the first flow channel There is a dust particle discharge port, and the casing is provided with an air sample outlet on one side of the second flow channel; a fan is disposed in the first flow channel of the casing; a gas flu detector, the gas flu detector The device is disposed in the first flow channel of the housing, and the air flu detector is located between the air sample inlet and the fan; and a filtering device is disposed in the second flow channel of the housing.