CN113390767A

CN113390767A - Dust detection device and dust detection method

Info

Publication number: CN113390767A
Application number: CN202110595016.1A
Authority: CN
Inventors: 董伟太; 陆鹏; 是蓉珠
Original assignee: Jiangsu Riying Electronics Co ltd
Current assignee: Jiangsu Riying Electronics Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-09-14

Abstract

The invention discloses a dust detection device and a dust detection method, wherein the dust detection device comprises an airflow guide shell, an airflow driving main body, a detection main body and a filtering main body, a detection channel of the airflow guide shell is communicated with at least an air inlet, a detection port and an air outlet, a filtering channel is communicated with the air inlet and the air blowing port, the air blowing port is communicated with the filtering channel and the detection channel, the airflow driving main body drives external gas to enter the airflow guide shell from the air inlet, the detection main body detects the gas entering the detection channel, the filtering main body filters the gas entering the filtering channel, the filtered gas enters the detection channel from the air blowing port, and dust particles in the gas to be detected are prevented from being attached to the inner wall defining the detection channel, so as to improve the detection accuracy of the dust detection device.

Description

Dust detection device and dust detection method

Technical Field

The present invention relates to a dust detection device, and more particularly, to a dust detection device and a dust detection method.

Background

In recent years, the industry is rapidly developed, the air pollution is increasingly serious, the haze weather frequently appears, the attention of people to the air quality is higher and higher, and especially the concentration of PM2.5 in the air becomes an important index for evaluating the quality of the air. PM2.5 can cause damage to the respiratory system and cardiovascular system of human body, cause diseases such as dyspnea, chronic bronchitis, heart disease and the like, and even endanger the life of patients with cardiopulmonary disease. There are also a lot of devices for detecting PM2.5 in the market, and PM2.5 detectors are also widely used in the fields of automobiles, smart home appliances, industrial production, and the like, wherein methods for detecting PM2.5 include gravimetric methods, β -ray absorption methods, laser projection methods, light scattering methods, light absorption techniques, and the like. It is common, for example, to maintain a laser device on one side of an air flow channel through which the gas is guided, the laser device emits a laser beam into the air flow channel, the gas is guided to pass through a region irradiated by the laser beam, dust particles in the gas scatter the laser beam, the transmitted and scattered laser beam is received by a receiving device, and the dust content per unit flow rate of the gas can be calculated based on the intensities of the transmitted light and the scattered light of the laser beam.

However, the existing detection device still has many problems in the using process. Specifically, when the gas passes through the gas flow channel, dust particles in the gas can adhere to the inner wall defining the gas flow channel and also adhere to the surfaces of the laser device and the receiving device, and the detection result of the dust concentration is influenced. Moreover, as the usage time increases, the more dust adheres to the inner wall defining the airflow passage, the surface of the laser device and the surface of the receiving device, and the deviation of the detection result becomes larger and larger.

Therefore, improvement of the existing apparatus for detecting PM2.5 is required to improve the accuracy of detection.

Disclosure of Invention

An object of the present invention is to provide a dust detection device and a dust detection method, wherein the dust detection device can accurately detect the dust content in the outside air.

Another objective of the present invention is to provide a dust detecting device and a dust detecting method, wherein when external air is guided through a detecting channel of the dust detecting device, a detecting body of the dust detecting device detects air in the detecting channel to obtain dust content in the air. And the gas entering the detection channel is difficult to be attached to the inner wall for limiting the detection channel, so that the influence on the detection accuracy of the dust detection device is reduced.

Another object of the present invention is to provide a dust detecting apparatus and a dust detecting method, in which clean gas is continuously blown toward an inner wall defining the detection passage, and dust particles in the gas to be detected are prevented from adhering to the inner wall defining the detection passage.

Another object of the present invention is to provide a dust detecting device and a dust detecting method, wherein a flow of gas guided into the dust detecting device is divided into two parts, one part of the flow of gas directly enters the detecting channel, and the other part of the flow of gas is filtered and blown into the detecting channel, so as to prevent dust particles in the gas in the detecting channel from adhering to the inner wall defining the detecting channel.

Another object of the present invention is to provide a dust detecting device and a dust detecting method, wherein two external air flows enter a filtering channel and the detecting channel of the dust detecting device respectively, and the air entering the filtering channel is filtered and then enters the detecting channel, so as to prevent dust particles in the air in the detecting channel from adhering to the inner wall defining the detecting channel.

Another object of the present invention is to provide a dust detecting apparatus and a dust detecting method, in which the filtered gas is continuously blown not only to the inner wall defining the detection passage but also to the surface of the detection main body, thereby preventing not only dust particles in the gas from adhering to the inner wall defining the detection passage but also dust particles from adhering to the surface of the detection main body.

According to one aspect of the present invention, there is provided a dust detecting apparatus, comprising:

an airflow guiding housing, wherein the airflow guiding housing has at least one air inlet, a detection channel, a detection port, an air outlet, a filtering channel and at least one air blowing port, wherein the detection channel communicates with the air inlet, the detection port and the air outlet, wherein the filtering channel communicates with the air inlet and the air blowing port, and the air blowing port communicates with the filtering channel and the detection channel;

a flow driving body, wherein the flow driving body is mounted to the flow guiding housing, wherein the flow driving body drives external air from the air inlet into the interior of the flow guiding housing;

a detection body, wherein the detection body is mounted to the detection port of the airflow guide housing, and the detection body detects the gas entering the detection channel; and

and the filtering main body is arranged in the filtering channel of the airflow guide shell, the filtering main body filters the air entering the filtering channel, and the filtered air enters the detection channel from the air blowing port.

According to one embodiment of the present invention, a horizontal distance between the air blowing port and the air intake is smaller than a horizontal distance between the detection port and the air intake.

According to one embodiment of the invention, the size of the air blowing opening is smaller than the size of the detection channel.

According to an embodiment of the present invention, the air flow guiding housing has the air inlet and a communicating channel, the communicating channel communicates the air inlet and the filtering channel, a part of the air entering the air flow guiding housing from the air inlet is guided to enter the filtering channel from the communicating channel, and the other part of the air is guided to enter the detecting channel.

According to an embodiment of the present invention, the airflow guiding housing has two spaced air inlets, one of the air inlets is defined as a detecting air inlet, the other air inlet is defined as a filtering air inlet, the detecting air inlet is communicated with the detecting channel, the filtering air inlet is communicated with the filtering channel, external air respectively enters the airflow guiding housing from the detecting air inlet and the filtering air inlet, the air entering the airflow guiding housing from the detecting air inlet directly enters the detecting channel, and the air entering the airflow guiding housing from the filtering air inlet passes through the filtering channel and then enters the detecting channel from the blowing port.

According to one embodiment of the present invention, the size of the filtering intake vent is smaller than the size of the detecting intake vent.

According to one embodiment of the invention, the air blowing openings are implemented in two, two of which are arranged at the bottom of the inner wall delimiting the detection channel.

According to one embodiment of the present invention, the two air blowing ports are disposed opposite to each other or are disposed in a staggered manner.

According to an embodiment of the present invention, the airflow guide housing further has a holding space and a guide passage, the detection body includes a laser emitting unit having a laser emitting surface, and a light processing unit, wherein the holding space is communicated with the detection port, the laser emitting unit is mounted in the holding space with the laser emitting surface facing the detection port, the light processing unit is disposed on an inner wall defining the detection passage, the light processing unit corresponds to the detection port, and the guide passage communicates the filter passage and the holding space.

According to an embodiment of the present invention, the airflow guide housing further has a holding space and at least one partition passage, and the detection body includes a laser emitting unit and a light processing unit, wherein the laser emitting unit has a laser emitting surface, the laser emitting unit is mounted in the holding space with the laser emitting surface facing the detection port, the partition passage communicates the holding space and the detection port, and the partition passage is located between the holding space and the detection port.

According to an embodiment of the present invention, the air flow guide housing further has a guide passage, wherein the guide passage communicates the filter passage and the partition passage.

According to one embodiment of the invention, the air flow guiding housing has at least one flow guiding bevel, wherein the flow guiding bevel extends obliquely from the filter channel to the air blowing opening.

According to one embodiment of the invention, the air flow driving body is arranged at the air inlet.

According to one embodiment of the invention, the airflow driving body is disposed at the air outlet.

According to another aspect of the present invention, there is provided a dust detection method, including the steps of:

(a) driving external air to enter a detection channel of an airflow guide shell from at least one air inlet;

(b) guiding clean gas to blow into the detection channel from at least one blowing port; and

(c) and detecting the dust content in the gas in the detection channel.

According to an embodiment of the present invention, in the step (a), the external air is blown into the air flow guide housing by an air flow driving body.

According to an embodiment of the present invention, in the step (a), the external air is sucked into the air flow guide housing by an air flow driving body.

According to an embodiment of the present invention, before the step (b), a step (d) of filtering the gas entering the gas flow guide housing 10 to obtain clean gas is further included.

According to an embodiment of the present invention, in the step (d), the step (e) further includes the step of splitting the gas entering the gas flow guiding housing from one of the air inlets, wherein a part of the split gas directly enters the detection channel, and another part of the split gas enters a filtering channel from a communication channel for filtering.

According to an embodiment of the present invention, in the step (d), the step (f) further includes the step of guiding the external air into the airflow guiding housing from two air inlets respectively, the air entering the airflow guiding housing from one of the air inlets directly enters the detection channel, and the air entering the airflow guiding housing from the other air inlet enters a filtering channel for filtering.

According to an embodiment of the present invention, said step (c) further comprises the step of (g) introducing clean gas from a guide passage into a holding space provided with a laser emitting unit.

Drawings

Fig. 1 is a schematic perspective view of a dust detection apparatus according to a preferred embodiment of the invention.

Fig. 2 is an exploded view of the dust detection device according to the above preferred embodiment of the present invention.

Fig. 3A is an exploded view of an airflow guiding housing of the dust detecting device according to the above preferred embodiment of the invention.

Fig. 3B is an exploded view of the airflow guide housing of the dust detection apparatus according to the above preferred embodiment of the present invention.

Fig. 4A is a schematic sectional view of the airflow guide housing of the dust detection apparatus according to the above preferred embodiment of the present invention.

Fig. 4B is a schematic sectional view of the airflow guide housing of the dust detection apparatus according to the above preferred embodiment of the present invention.

Fig. 5 is a schematic view of the dust detection device according to the above preferred embodiment of the present invention.

Fig. 6 is an exploded view of the dust detection device according to another preferred embodiment of the invention.

Fig. 7 is a schematic view of the dust detection device according to the above preferred embodiment of the present invention.

Fig. 8 is an exploded view of the dust detection device according to another preferred embodiment of the invention.

Fig. 9 is a schematic view of the dust detection device according to the above preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 5 of the specification, a dust detection device 100 according to a preferred embodiment of the present invention will be described in the following description, wherein the dust detection device 100 can accurately detect the dust concentration in the air. Specifically, the dust detecting device 100 includes an airflow guiding housing 10, the airflow driving body 20, and a detecting body 30, wherein the airflow guiding housing 10 has at least an air inlet 101, a detecting channel 102, a detecting opening 103, and an air outlet 104, and the detecting channel 102 communicates with the air inlet 101, the detecting opening 103, and the air outlet 104. The airflow driving body 20 is attached to the airflow guide housing 10, and the detection body 30 is provided at the detection port 103 of the airflow guide housing 10. The airflow driving body 20 guides external air to enter the detection channel 102 from the air inlet 101, the air leaves the airflow guiding housing 10 from the air outlet 104 after passing through the detection body 30 located at the detection port 103, and the detection body 30 detects dust content in the passing air.

Further, referring to fig. 3A and 3B, the dust detecting device 100 further includes a filter body 40, wherein the airflow guiding housing 10 has a filter channel 105 and at least one blowing opening 106, wherein the filter channel 105 is communicated with the air inlet 101, and the blowing opening 106 is communicated with the filter channel 105 and the detecting channel 106. The filter body 40 is disposed in the filter channel 105, the air entering the airflow guide housing 10 from the air inlet 101 is guided to enter the filter channel 105, the filter channel filters and purifies the air entering the filter channel 105, absorbs dust particles in the air, the purified clean air is blown out from the air blowing port 106 of the airflow guide housing 10, the clean air blows away the dust on the inner wall of the detection channel 102 defined by the airflow guide housing 10, and the detection result of the detection body 30 is prevented from being influenced by the dust on the inner wall of the detection channel 102 defined by the dust when passing through the detection channel 102.

It should be noted that the embodiment of the filter body 40 is not limited, for example, but not limited to, the filter body 40 is implemented as a filter net, gauze, filter cotton, or other filter elements known to those skilled in the art, and the embodiment of the filter body 40 is only an example and is not intended to limit the content and scope of the dust detection apparatus 100 of the present invention.

Further, a horizontal distance between the air blowing port 106 and the air inlet 101 is smaller than a horizontal distance between the detection port 103 and the air inlet 101, that is, the air blowing port 106 is closer to the air inlet 101, after the air entering the detection channel 102 from the air inlet 101 passes through the air blowing port 106, the air passes through the detection main body 30, and the clean air blown out from the air blowing port 106 is continuously blown to the inner wall defining the detection channel 102, so that the air to be detected cannot be adsorbed on the inner wall defining the detection channel 102. In this way, the detection result of the detection subject 30 is advantageously improved.

Furthermore, the air blowing port 106 is located on one side of the detection port 103, the air blowing port 106 is close to the detection port 103, and the air blown out from the air blowing port 106 is blown to the detection main body 30, so that the dust particles attached to the surface of the detection main body 30 can be taken away by the clean air blown out from the air blowing port 106, and the dust particles attached to the surface of the detection main body 30 are reduced, so as to improve the detection accuracy of the detection main body 30.

The airflow guiding housing 10 further has a mounting channel 107, wherein the mounting channel 107 is connected to the air inlet 101, the detecting channel 102, the detecting opening 103 and the air outlet 104. The gas guiding body 20 is held in the assembly channel 107, and external gas flow enters the gas flow guiding housing 10 from the air inlet 101 under the action of the gas guiding body 20, and the gas flow driving body 20 drives the gas flow in the gas flow guiding housing 10.

Referring to fig. 1 to 7, in some specific embodiments of the present invention, the mounting opening of the mounting channel 107 is the air outlet 104, that is, the air flow driving body 20 is disposed at the air outlet 104, and the air flow driving body 20 sucks external air into the air inlet 101 by forming a negative pressure at the outer side of the air outlet 104 and guides the air flowing inside the air flow guiding housing 10. Under the action of the airflow driving body 20, the external air sequentially passes through the air inlet 101, the detection channel 102, the detection port 103, and the assembly channel 107, and then leaves the airflow guiding housing 10 from the air outlet 104. And the external air passes through the air inlet 101, the filtering channel 105, the air blowing port 106, the detecting channel 102, the detecting port 103, and the assembling channel 107 in sequence under the action of the air flow driving body 20, and then leaves the air flow guiding housing 10 from the air outlet 104. The external air passes through the airflow driving main body 20 after being detected, so that dust attached to the surface of the airflow driving main body 20 is prevented from entering the detection passage 102 along with the external air.

Alternatively, referring to fig. 8 and 9, the mounting opening of the mounting passage 107 is the air inlet 101, the airflow driving body 20 is disposed at the air inlet 101, and the airflow driving body 20 blows external air from the air inlet 101 into the interior of the airflow guide housing 10 by forming a negative pressure at the outer side of the air inlet 101. Under the action of the airflow driving body 20, the external air sequentially passes through the assembly channel 107, the air inlet 101, the detection channel 102, and the detection port 103, and then leaves the airflow guiding housing 10 from the air outlet 104. And the external air passes through the assembling channel 107, the air inlet 101, the filtering channel 105, the air blowing port 106, the detecting channel 102 and the detecting port 103 in sequence under the action of the air flow driving body 20, and then leaves the air flow guiding housing 10 from the air outlet 104.

It should be noted that the specific implementation of the airflow driving body 20 is not limited, for example, but not limited to, the airflow driving body 20 is implemented as a fan, a negative pressure generator or other devices known to those skilled in the art.

In this particular embodiment of the dust detection apparatus 100 according to the present invention, the air inlet 101 of the air flow guide housing 10 is implemented as one, and the air entering the air flow guide housing 10 from the air inlet 101 is respectively guided into the filter channel 105 and the detection channel 102.

Specifically, referring to fig. 3B to 4B, the airflow guide housing 10 further has a communication channel 108, wherein the communication channel 108 communicates the filtering channel 105 and the detecting channel 102, and the communication channel 108 is close to the air inlet 101. A flow of gas entering the gas guiding housing 10 from the air inlet 101 is divided into two parts, i.e., dust, wherein a part of the gas enters the filtering channel 105 through the communicating channel 108, is filtered and purified by the filtering main body 40 disposed in the filtering channel 105, is blown into the detecting channel 102 from the air blowing port 106, passes through the detecting port 103, and then leaves the gas flow guiding housing 10 from the air outlet 104; another part of the gas flows along the detection channel 102, and after passing through the detection port 103, leaves the gas flow guiding housing 10 from the air outlet 104.

That is, both ends of the filter passage 105 communicate with the detection passage 102 through the communication passage 108 and the air blowing port 106, respectively.

Further, the cross-sectional dimensions of the communication channel 108 and the air blowing opening 106 are small and much smaller than the cross-sectional dimensions of the air inlet 101 and the detection channel 108, so that only a small portion of the air flow entering the air flow guide housing 10 from the air inlet 101 is distributed into the filtering channel 105 for filtering and purifying and then blown out from the air blowing opening 106. Most of the gas entering the air inlet 101 directly enters the detection channel 102 for detection. In this way, the filtered gas not only prevents dust particles in the detected gas from being attached to the inner wall of the gas guide housing 10, but also the influence of a small amount of the filtered gas on the detection result is negligible.

Referring to fig. 6 to 7, in an embodiment of the present invention, the air inlets 101 of the airflow guiding housing 10 are implemented as two air inlets 101, two air inlets 101 are spaced apart from each other, and define one of the air inlets 101 as a detecting air inlet 1011, the other air inlet 101 as a filtering air inlet 1012, the detecting air inlet 1011 is connected to the detecting channel 102, and the filtering air inlet 1012 is connected to the filtering channel 105. Under the action of the airflow driving body 20, two air streams in an external environment respectively enter the inside of the airflow guiding housing 10 from the detecting air inlet 1011 and the filtering air inlet 1012, the airflow entering the inside of the airflow guiding housing 10 from the detecting air inlet 1011 sequentially passes through the detecting channel 102 and the detecting port 103 and then leaves the airflow driving body 20 from the air outlet 104, after the airflow entering the inside of the airflow guiding housing 10 from the filtering air inlet 101 enters the filtering channel 105, the filtering body 40 filters and purifies the airflow, and after the filtered clean air enters the detecting channel 102 from the air blowing port 106 and passes through the detecting port 103, the filtered clean air leaves the airflow guiding housing 10 from the air outlet 104.

That is, the filter passage 105 communicates with the detection passage 102 only through the air blowing port 106.

Further, the sizes of the filtering air inlet 101 and the air blowing opening 106 directly communicated with the filtering channel 105 are far smaller than the sizes of the detecting air inlet 101 and the detecting channel 102 directly communicated with the detecting channel 102. Thus, the gas entering the filter channel 105 from the filter inlet 101 is much less than the gas entering the detection channel 102 directly from the detection inlet 101 under the action of the airflow driving body 20. That is, the amount of air blown from the air blowing port 106 to the detection channel 102 is much less than the amount of air directly entering the detection channel 102 from the detection air inlet 101. In this way, the filtered gas can not only prevent dust particles in the detected gas from attaching to the inner wall of the gas guide housing 10, but also the influence of a small amount of filtered gas on the detection result is small and can be ignored.

In a specific embodiment of the present invention, the number of the air blowing openings 106 is implemented as two, and two air blowing openings 106 are formed at two opposite sidewalls defining the sensing passage 102. That is, the gas entering the filtering passage 105 is filtered by two dust streams, and enters the detecting passage 102 through the two air blowing ports 106. Optionally, the air blowing openings 106 are oppositely arranged, that is, the distances from the two air blowing openings 106 to the detection opening 103 are consistent. Alternatively, the two air blowing openings 106 are arranged in a staggered manner, that is, the distances from the two air blowing openings 106 to the detection opening 103 are not the same.

Preferably, the air blowing opening 106 is formed at the bottom of two opposite side walls defining the detection channel 102, and the clean gas blown out from the air blowing opening 106 can prevent not only the dust particles in the gas to be detected from being attached to the two opposite side walls defining the detection channel 102, but also the dust particles in the gas to be detected from being attached to the bottom wall defining the detection channel 102.

In another specific embodiment of the present invention, the number of the air blowing openings 106 is implemented as three, wherein two air blowing openings 106 are formed at two opposite side walls defining the sensing passage 102, and the other air blowing opening 106 is formed at a bottom wall defining the sensing passage 102. The clean gas blown out from the air blowing port 106 can prevent dust particles in the gas to be detected from being attached to the side walls and the bottom wall defining the detection passage 102.

It should be noted that the specific number and the specific distribution of the air blowing openings 106 are only examples, and should not be construed as limiting the content and scope of the dust detection apparatus 100 according to the present invention. In other embodiments of the present invention, the number of the air blowing openings 106 may be one, four or other numbers.

In this particular embodiment of the dust detection device 100 according to the present invention, the air flow guide housing 10 of the dust detection device 100 has at least one flow guide slope 109, wherein the flow guide slope 109 extends obliquely from the filter passage 105 to the air blowing opening 106, and the flow guide slope 109 is held on one side of the air blowing opening 106. Under the action of the airflow driving body 20, the clean air filtered by the filtering body 40 enters the detection channel 102 from the air blowing opening 106 orderly and smoothly along the drainage slope 109.

The airflow guide housing 10 further has a holding space 110, wherein the holding space 110 is communicated with the detection port 103, the detection body 30 is disposed in the holding space 110, and the detection body 30 detects the gas passing through the detection port 103.

Preferably, the detecting body 30 includes a laser emitting unit 31 and a light processing unit 32, wherein the laser emitting unit 31 has a laser emitting surface 310, wherein the laser emitting unit 31 is installed in the holding space 110 with the laser emitting surface 310 facing the detecting opening 103, the light processing unit 32 is disposed on an inner wall defining the detecting channel 102, and the light processing unit 32 is opposite to the detecting opening 103. The laser emitting unit 31 emits a laser beam towards the detection port 103, the laser beam reaches the detection channel 102 after passing through the detection port 103, the laser beam irradiates the dust particles in the gas in the detection channel 102 to be scattered, the light processing unit 32 collects the scattered laser beam, and the content of the dust particles in the gas passing through the detection channel 102 can be obtained after the laser beam is analyzed and processed.

It should be noted that the specific embodiment of the detecting body 30 is not limited, and the detecting body 30 can detect the dust particles in the gas passing through the detecting channel 102 by a laser projection method, a light scattering method, a light absorption method, a beta ray absorption method or other methods known to those skilled in the art. Also, it should be understood by those skilled in the art that the specific embodiment of the detecting body 30 is only an example, and is not intended to limit the content and scope of the dust detecting device 100.

Referring to fig. 3A and 3B, the gas flow guiding housing 10 further has two partition channels 111 communicating with each other, wherein the partition channels 111 communicate the holding space 110 and the detection port 103, wherein the partition channels 111 are located between the holding space 110 and the detection port 103, increasing the distance between the laser emitting surface 310 of the laser emitting unit 31 and the detection port 103, and the gas entering the partition channels 111 is easy to generate a vortex flow to facilitate blocking dust particles in the gas from adhering to the laser emitting surface 310 of the laser emitting unit 31. Preferably, the two separation channels 111 have a cross-section in the shape of a gourd.

Referring to fig. 3B, 4B and 5, in this particular embodiment of the present invention, the air flow guiding housing 10 further has a guiding passage 112, wherein the guiding passage 112 communicates the filtering passage 105 and the separating passage 111, and the guiding passage 112 is adjacent to the laser emitting surface 310 of the laser emitting unit 31. The filtered clean gas in the filtering channel 105 is continuously blown into the separating channel 111 from the guiding channel 112, so that dust in the gas to be detected is reduced to be close to the laser emitting surface 310 of the laser emitting unit 31, and the cleanness of the laser emitting surface 310 of the laser emitting unit 31 is maintained. In addition, the clean gas entering the separation channel 111 from the guide channel 112 continuously blows out the gas to be detected entering the separation channel 111 from the detection port 103, so as to ensure the cleanness of the laser emitting surface 310.

The dust detecting apparatus 100 further includes a containing body 50, wherein the containing body 50 includes an upper housing 51 and a lower housing 52, the upper housing 51 has an air inlet opening 501 and an air outlet opening 502, wherein the upper housing 51 is mounted on the lower housing 52, and a containing space 503 is formed between the upper housing 51 and the lower housing 52. The airflow guide housing 10 is held in the accommodation space 503 in such a manner that the intake opening 101 and the exhaust opening 102 correspond to the intake opening 501 and the exhaust opening 502 of the upper housing 51, respectively.

The accommodating body 50 of the dust detecting device 100 further includes at least one fitting 53, wherein the fitting 50 is disposed on the lower housing 52, and the dust detecting device 100 can be fixed at a use position by the fitting 50. It should be noted that the embodiment of the assembly member 53 is not limited, and the assembly member 53 can be fixed to the using position by, but not limited to, hanging, clamping, magnetic attraction, screwing, snapping, etc.

The dust detecting device 100 further includes a circuit body 60, wherein the circuit body 60 is mounted in the accommodating space 503 of the accommodating body 50, and wherein the circuit body 60 is communicated with the airflow guiding body 20 and the detecting body 30.

The dust detection device 100 further includes a communication body 70, the accommodating body 50 has a mounting opening 504 communicating with the accommodating space 503, wherein the communication body 70 is held at the mounting opening 504 in a manner of being communicably connected to the circuit body 60, and the dust detection device 100 can exchange data with an external electric device through the communication body 70. For example, when an external electric device is communicably connected to the communication main body 70, the electric device may acquire detection data and the like of the detection main body 30.

In another aspect of the present invention, a dust detection method according to a preferred embodiment of the present invention will be described in the following description, wherein the dust detection method comprises the steps of:

(a) driving external air from at least one of the air inlets 101 into the detection channel 102 of the airflow guiding housing 10;

(b) directing clean gas from at least one of said blowing ports 106 into said detection channel 102; and

(c) the dust content in the gas in the detection channel 102 is detected.

Specifically, in one specific embodiment of the present invention, in the step (a), the external air is blown into the air flow guiding housing 10 by the air flow driving body 20. Alternatively, in the step (a), the external air is sucked into the air flow guide housing 10 by the air flow driving body 20.

In a specific embodiment of the present invention, step (d) is further included before step (b): the gas entering the gas flow guide housing 10 is filtered to obtain clean gas. Specifically, in the step (d), the filter body 40 held in the filter passage 105 filters the gas entering the filter passage 105 by absorption, interception, or the like to obtain clean gas.

In a specific embodiment of the present invention, in the step (d), the step (e) further includes a step of splitting the gas entering the gas flow guiding housing 10 from one of the air inlets 101, wherein a part of the split gas directly enters the detecting channel 102, and another part of the split gas enters the filtering channel 105 from the communicating channel 108 for filtering.

In another specific embodiment of the present invention, in the step (d), the step (f) further includes the step of guiding the external air into the airflow guide housing 10 from two air inlets 101, respectively, the air entering the airflow guide housing 10 from one of the air inlets 101 directly enters the detection channel 101, and the air entering the airflow guide housing 10 from the other air inlet 101 enters the filtering channel 105 for filtering.

In the step (c), the dust particles in the gas passing through the detection channel 102 are detected by the detection body 30 through a laser projection method, a light scattering method, a light absorption method, a beta ray absorption method or other methods known to those skilled in the art.

In a specific embodiment of the present invention, step (g) of guiding clean gas from a guiding channel 112 to blow into a holding space 110 provided with a laser emitting unit 31 is further included before step (c) to reduce dust particles contained in the gas to be detected from approaching the laser emitting surface 310 of the laser emitting unit 31.

It will be appreciated by persons skilled in the art that the above embodiments are only examples, wherein features of different embodiments may be combined with each other to obtain embodiments which are easily conceivable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A dust detection device, comprising:

2. The dust detecting device of claim 1, wherein a horizontal distance between the air blowing port and the air inlet is smaller than a horizontal distance between the detecting port and the air inlet.

3. The dust detecting device according to claim 2, wherein a size of the air blowing port is smaller than a size of the detecting passage.

4. A dust detecting device according to claim 2, wherein the airflow guide housing has one of the air inlet and a communicating passage, the communicating passage communicates the air inlet and the filtering passage, a part of the air entering the airflow guide housing from the air inlet is guided to enter the filtering passage from the communicating passage, and another part of the air is guided to enter the detecting passage.

5. The dust detecting device of claim 2, wherein the airflow guiding housing has two spaced air inlets, defining one of the air inlets as a detecting air inlet and the other air inlet as a filtering air inlet, the detecting air inlet is connected to the detecting channel, the filtering air inlet is connected to the filtering channel, external air enters the airflow guiding housing from the detecting air inlet and the filtering air inlet, the air entering the airflow guiding housing from the detecting air inlet directly enters the detecting channel, and the air entering the airflow guiding housing from the filtering air inlet passes through the filtering channel and then enters the detecting channel from the blowing port.

6. The dust testing device of claim 5, wherein the size of the filtering air inlet is smaller than the size of the testing air inlet.

7. The dust detecting device according to claim 3, wherein the air blowing port is implemented in two, and the two air blowing ports are provided at a bottom of an inner wall defining the detection passage.

8. The dust detecting device according to claim 7, wherein the two air blowing ports are disposed to be opposed to each other or are disposed to be displaced.

9. The dust detecting device according to any one of claims 1 to 8, wherein the airflow guide housing further has a holding space and a guide passage, the detecting body includes a laser emitting unit having a laser emitting surface, and a light processing unit, wherein the holding space is communicated with the detecting port, the laser emitting unit is mounted in the holding space with the laser emitting surface facing the detecting port, the light processing unit is provided in an inner wall defining the detecting passage, the light processing unit corresponds to the detecting port, and the guide passage communicates the filter passage and the holding space.

10. The dust detecting device according to any one of claims 1 to 8, wherein the airflow guide housing further has a holding space and at least one partition passage, the detecting body includes a laser emitting unit and a light processing unit, wherein the laser emitting unit has a laser emitting surface, the laser emitting unit is mounted in the holding space with the laser emitting surface facing the detection port, the partition passage communicates the holding space and the detection port, and the partition passage is located between the holding space and the detection port.

11. The dust detecting device of claim 10, wherein the airflow guide housing further has a guide passage, wherein the guide passage communicates the filter passage and the partition passage.

12. The dust detecting device according to any one of claims 1 to 8, wherein the airflow guide housing has at least one flow guide slope, wherein the flow guide slope extends obliquely from the filter passage to the air blowing port.

13. The dust detecting device according to any one of claims 1 to 8, wherein the air flow driving body is provided at the air inlet.

14. The dust detecting device according to any one of claims 1 to 8, wherein the airflow driving body is disposed at the air outlet.

15. A dust detection method is characterized by comprising the following steps:

(c) and detecting the dust content in the gas in the detection channel.

16. A dust detecting method according to claim 15, wherein in the step (a), the outside air is blown into the air flow guide housing by an air flow driving body.

17. The dust detecting method according to claim 15, wherein in the step (a), the outside air is sucked into the air flow guide housing by an air flow driving body.

18. The dust detection method according to any one of claims 15 to 17, further comprising a step (d) of: the gas entering the gas flow guide housing 10 is filtered to obtain clean gas.

19. A dust detecting method according to claim 18, wherein in the step (d), the method further includes a step (e) of splitting the gas entering the gas flow guiding housing from one of the air inlets, wherein a part of the split gas directly enters the detecting channel, and another part of the split gas enters a filtering channel from a communicating channel for filtering to obtain clean gas.

20. A dust detecting method according to claim 18, wherein in the step (d), the method further includes the step (f) of guiding outside air into the airflow guiding housing from two air inlets respectively, wherein the air entering the airflow guiding housing from one of the air inlets directly enters the detecting channel, and the air entering the airflow guiding housing from the other air inlet enters a filtering channel for filtering to obtain clean air.

21. A dust detecting method according to claim 18, further comprising a step of (g) blowing clean gas from a guide passage into a holding space provided with a laser emitting unit before said step (c).