Particulate matter detection device, detection method thereof, and purification apparatus

Abstract

The present application relates to the field of particulate matter detection, and discloses a particulate matter detection device, a detection method thereof and a purification equipment, comprising: a light transmission sheet; a light source for generating light and irradiating the light transmission sheet; a ventilation assembly for guiding particulate matter in air to the light transmission sheet, the particulate matter blocking at least part of the light; and a detector configured to detect pixel units on the light transmission sheet. Thus, the particulate matter guided to the light transmission sheet can be accurately identified by the detector, thereby realizing accurate determination of the particulate matter and significantly improving the accuracy and resolution of particulate matter detection.

Description

Technical Field

[0001] This invention relates to the field of particulate matter detection, and in particular to a particulate matter detection device, detection method, and purification equipment. Background Technology

[0002] Traditional particulate matter detection methods typically employ the following approach: a fan generates airflow to draw particulate matter into a sensor detection chamber, a laser illuminates the particulate matter to generate scattered light, a photosensitive element receives the scattered light, and the particle size is determined based on the intensity of the scattered light.

[0003] The aforementioned laser scattering method, due to the limited dynamic range of a single light source, struggles to operate effectively across a very large particle size range. It cannot fully cover the particle size range of interest, and can only detect particles ranging from 0.3 μm to 10 μm in size, acquiring only the particle size dimension. With increasingly complex air environments, many air pollutants, such as pollen, dust mites, dander, and pet hair, have particle sizes larger than 10 μm. Traditional particulate sensors are no longer sufficient to meet current air quality monitoring needs. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a particulate matter detection device and its detection method, as well as a purification device, which can achieve accurate measurement of particulate matter and significantly improve the accuracy and resolution of particulate matter detection.

[0005] To solve the above-mentioned technical problems, the present invention provides a particulate matter detection device, comprising:

[0006] Translucent sheet;

[0007] A light source, used to generate light and illuminate the light-transmitting sheet;

[0008] A ventilation assembly for directing airborne particulate matter to the light-transmitting sheet, the particulate matter blocking at least a portion of the light;

[0009] The detector is configured to detect pixel units on the light-transmitting sheet.

[0010] In a first aspect, the particulate matter detection device provided by the present invention further includes:

[0011] A processor is configured to acquire the characteristics and / or total quantity value of the particulate matter through the detection signal of the detector.

[0012] On the other hand, in the particulate matter detection device provided by the present invention, the processor is also used to distinguish the types of particulate matter based on the obtained contour features and particle size of the particulate matter.

[0013] On the other hand, the particulate matter detection device provided by the present invention further includes:

[0014] The controller is electrically connected to both the ventilation component and the processor, and is used to regulate the wind speed of the ventilation component and send the wind speed value of the ventilation component to the processor.

[0015] The processor is further configured to detect the concentration of the particulate matter based on the total number of the particulate matter and the wind speed of the ventilation component.

[0016] On the other hand, in the particulate matter detection device provided by the present invention, the controller is used to reduce the airflow speed of the ventilation component when the concentration of the particulate matter fed back by the processor exceeds the maximum concentration threshold; and to increase the airflow speed of the ventilation component when the concentration of the particulate matter fed back by the processor is less than the minimum concentration threshold.

[0017] On the other hand, in the particulate matter detection device provided by the present invention, the ventilation component is located near the airflow inlet of the particulate matter detection device;

[0018] The light source is positioned between the ventilation assembly and the light-transmitting sheet.

[0019] To address the aforementioned technical problems, the present invention also provides a detection method for a particulate matter detection device, comprising:

[0020] The light source produces light and shines onto the light-transmitting sheet;

[0021] The ventilation assembly directs airborne particles toward the light-transmitting sheet, and the particles block at least part of the light.

[0022] The detector detects the pixel units on the light-transmitting sheet.

[0023] On the other hand, the detection method of the particulate matter detection device provided by the present invention further includes:

[0024] The processor acquires the characteristics and / or total quantity value of the particulate matter through the detection signal of the detector.

[0025] On the other hand, the detection method of the particulate matter detection device provided by the present invention further includes:

[0026] The controller regulates the airflow speed of the ventilation component and sends the airflow speed value of the ventilation component to the processor;

[0027] The processor detects the concentration of the particulate matter based on the total number of particulate matter and the wind speed of the ventilation component.

[0028] To address the aforementioned technical problems, the present invention also provides a purification device, comprising: the particulate matter detection device provided by the present invention, a filter screen disposed at the airflow outlet of the particulate matter detection device, and a fan component on the side of the filter screen away from the particulate matter detection device.

[0029] As can be seen from the above technical solution, the particulate matter detection device provided by the present invention includes: a light-transmitting sheet; a light source for generating light and illuminating the light-transmitting sheet; a ventilation assembly for guiding airborne particulate matter to the light-transmitting sheet, wherein the particulate matter blocks at least part of the light; and a detector configured to detect pixel units on the light-transmitting sheet.

[0030] The beneficial effects of the present invention are that the particulate matter detection device provided by the present invention replaces the laser tube and photosensitive element in the existing solution with a light source, a light-transmitting plate and a detector. The light source generates light and illuminates the light-transmitting plate. The ventilation component guides the particulate matter in the air to the light-transmitting plate. The particulate matter will block at least part of the light. The detector can detect the pixel units on the light-transmitting plate. In this way, the particulate matter guided to the detector can be accurately identified by the detector, thereby realizing the accurate measurement of particulate matter, significantly improving the accuracy and resolution of particulate matter detection, and can realize the accurate detection of particulate matter larger than 10μm, thus getting rid of the problem of limited dynamic range of laser scattering scheme.

[0031] Furthermore, the present invention also provides a corresponding detection method and purification equipment for particulate matter detection devices, which have the same or corresponding technical features as the particulate matter detection devices mentioned above, further making the particulate matter detection devices more practical. The detection method and purification equipment have corresponding advantages. Attached Figure Description

[0032] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the particulate matter detection device provided in an embodiment of the present invention;

[0034] Figure 2 This is a flowchart of the detection method of the particulate matter detection device provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the purification device provided in an embodiment of the present invention.

[0036] In this array, 1 is the ventilation component, 2 is the light source, 3 is the light-transmitting sheet, 4 is the processor, A is the airflow inlet of the particulate matter detection device, B is the airflow outlet of the particulate matter detection device, 5 is the filter, 6 is the fan component, C is the airflow inlet of the purification equipment, and D is the airflow outlet of the purification equipment. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0038] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 This is a schematic diagram of the structure of a particulate matter detection device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the particulate matter detection device includes: a ventilation assembly 1, a light source 2, a light-transmitting sheet 3, and a detector;

[0039] Light source 2 is used to generate light and illuminate the light-transmitting sheet 3;

[0040] Ventilation component 1 is used to guide airborne particles to light-transmitting sheet 3, where the particles block at least part of the light;

[0041] The detector is configured to detect pixel units on the light-transmitting sheet 3.

[0042] In the particulate matter detection device provided in this embodiment of the invention, the laser tube and photosensitive element in the existing solution can be replaced with a light source 2, a light-transmitting plate 3, and a detector. The light source 2 generates light and illuminates the light-transmitting plate 3. The ventilation component 1 guides the particulate matter in the air to the light-transmitting plate 3. The particulate matter will block at least part of the light. The detector detects the pixel units on the light-transmitting plate 3. In this way, the particulate matter guided to the light-transmitting plate 3 can be accurately identified by the detector, realizing accurate measurement of particulate matter, significantly improving the accuracy and resolution of particulate matter detection, and enabling accurate detection of particulate matter larger than 10μm, thus overcoming the problem of limited dynamic range of laser scattering schemes. It should be noted that the ventilation component 1 of the present invention can be a fan, which can guide the particulate matter in the air to the surface of the light-transmitting plate 3. The light source 2 can be a light-emitting diode (LED) light source, or other light sources, as long as they can generate light. The detector is a device used to convert light signals into electrical signals. The light-transmitting plate 3 can contain high-density small-sized pixel units, each of which can independently detect the transmission and obstruction of light, thereby working in conjunction with the detector to realize image display. The particulate matter is guided by the airflow to the surface of the light-transmitting sheet 3, blocking at least part of the pixel unit. The detector can detect the pixel unit on the light-transmitting sheet 3; the accurate measurement of the particulate matter is achieved based on the light intensity change signal on the detected pixel unit.

[0043] In some optional embodiments, the particulate matter detection device provided by the present invention may include:

[0044] Translucent sheet 3;

[0045] Light source 2 is used to generate light and illuminate the light-transmitting sheet 3;

[0046] Ventilation component 1 is used to guide airborne particles to light-transmitting sheet 3, where the particles block at least part of the light;

[0047] The detector is configured to receive light passing through the light-transmitting sheet 3.

[0048] It is understood that in the above embodiments, the light-transmitting sheet 3 may include a color filter (CF) and / or a microlens; the detector may include a photoelectric sensor, such as a photodiode (PD), etc. The light-transmitting sheet 3 and the detector may be stacked to form a pixel unit of an image sensor, such as a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor.

[0049] In the above embodiment, the particles guided by the ventilation component 1 will block at least part of the light. The light is received by the detector after passing through the light-transmitting sheet 3. In this way, the particles guided to the light-transmitting sheet 3 can be accurately identified by the detector, realizing accurate measurement of particles, significantly improving the accuracy and resolution of particle detection, and enabling accurate detection of particles larger than 10μm, thus overcoming the problem of limited dynamic range of laser scattering schemes.

[0050] In some optional embodiments, the particulate matter detection device provided by the present invention may include:

[0051] Light source 2 is used to generate light signals;

[0052] Ventilation component 1 is used to guide airborne particles to detector 3, where the particles block at least part of the light signal;

[0053] Detector 3 is configured to receive the optical signal.

[0054] It is understood that in the above embodiments, the detector 3 may include a photoelectric sensor, such as a photodiode (PD), and the detector may include pixel units.

[0055] Understandably, light source 2 is used to generate light signals, and detector 3 can be a device used to sense changes in light intensity and convert the light signals into electrical signals. It contains high-density, small-sized pixel units and can be a complementary metal-oxide-semiconductor (CMOS) image sensor, a charge-coupled device (CCD) image sensor, or other detectors. Particles are guided by the airflow to the surface of detector 3, blocking at least some of the pixel units and thus at least some of the light signals. Detector 3 can then accurately measure the particles based on the light signals detected from the pixel units.

[0056] In the above embodiment, the particles guided by the ventilation component 1 will block at least part of the light signal. The light signal is guided to the detector 3. The detector 3 can accurately measure the particles based on the light signal affected by the particles, which significantly improves the accuracy and resolution of particle detection and enables accurate detection of particles larger than 10μm, thus overcoming the problem of limited dynamic range of laser scattering schemes.

[0057] In some optional embodiments, the particulate matter detection device provided by the present invention may include:

[0058] Translucent sheet 3;

[0059] Light source 2 is used to generate light signals;

[0060] Ventilation component 1 is used to guide airborne particles to light-transmitting sheet 3, where the particles block at least part of the light signal;

[0061] A detector is used to receive light signals transmitted through the light-transmitting sheet 3.

[0062] It is understood that in the above embodiments, the light-transmitting sheet 3 may include a simple optical lens without pixel units. Its main function is to allow light signals to pass through or to filter and refract light. The detector described above can be a device used to sense changes in light intensity and convert light signals into electrical signals. It contains high-density, small-sized pixel units and can be a complementary metal-oxide-semiconductor (CMOS) image sensor, a charge-coupled device (CCD) image sensor, or other detectors. After the light signal passes through the light-transmitting sheet 3, the detector can receive the light signal transmitted through the light-transmitting sheet 3 and use the pixel units to achieve specific image display or information processing functions.

[0063] In the above embodiment, after the light source 2 generates a light signal, the light signal passes through the light-transmitting sheet 3. The particles guided by the ventilation component 1 block at least part of the light signal. The detector receives the light signal transmitted through the light-transmitting sheet 3 and can accurately measure the particles based on the light signal affected by the particles, significantly improving the accuracy and resolution of particle detection. Furthermore, it can accurately detect particles larger than 10 μm, overcoming the limitation of dynamic range inherent in laser scattering schemes. Moreover, the light-transmitting sheet 3 facilitates cleaning, avoiding frequent cleaning operations on the detector.

[0064] Furthermore, in a specific implementation, the particulate matter detection device provided in the embodiments of the present invention may further include: a processor 4, which can be used to acquire the characteristics and / or total quantity value of particulate matter through the detection signal of the detector.

[0065] In implementation, processor 4 can characterize particulate matter features based on the light intensity change signal on the pixel unit. The particulate matter features acquired by processor 4 can include contour features, particle size, etc.

[0066] Furthermore, in a specific implementation, in the particulate matter detection device provided in the embodiments of the present invention, the processor 4 can also be used to distinguish the types of particulate matter based on the obtained contour features and particle size of the particulate matter.

[0067] In practice, the processor 4 can distinguish the types of particulate matter based on the obtained contour features and particle size.

[0068] Furthermore, in a specific implementation, the particulate matter detection device provided in the embodiments of the present invention may further include: a controller, which is electrically connected to the ventilation component 1 and the processor 4 respectively, for regulating the wind speed of the ventilation component 1 and sending the wind speed value of the ventilation component 1 to the processor 4.

[0069] In practice, the controller can dynamically adjust the airflow speed of the ventilation component 1 according to the application scenario. When the ventilation component 1 draws in and guides airborne particles to the light-transmitting sheet 3, the processor 4 can send corresponding instructions to the controller under different application scenarios. After receiving the corresponding instructions, the controller can adjust the airflow speed of the ventilation component 1 to adapt to different application scenarios and send the airflow speed value to the processor 4, thereby enabling the processor 4 to ensure that the concentration of particulate matter can be detected.

[0070] Furthermore, the processor 4 can also be used to detect the concentration of particulate matter based on the total number of particulate matter and the wind speed of the ventilation component 1.

[0071] In practice, the detector can transmit the signals from the detected pixel units to the processor after a unit of time. The processor can analyze the detection signals from the blocked pixel units in the light-transmitting sheet 3 within a unit of time to obtain the shape characteristics and total quantity of particles within that unit of time. Then, the processor 4 can obtain the concentration of particles of different sizes in the air based on the total quantity of particles obtained within a unit of time and the wind speed of the ventilation component 1 within a unit of time.

[0072] In practical applications, the unit time can be set to 1 second, 1 minute, 1 hour, or other time periods; no specific limitation is made here. The processor 4 can calculate the particulate matter concentration by dividing the total number of particles acquired by the product of the wind speed of the ventilation component 1 and the size of the air inlet. The product of the wind speed of the ventilation component 1 and the size of the air inlet can be understood as the airflow rate. Dividing the total number of particles acquired by the detector per unit time by the airflow rate per unit time allows for the determination of the concentration of particles of various sizes.

[0073] This invention provides more accurate data support for air quality monitoring by real-time monitoring and analysis of particulate matter concentration in the user's environment.

[0074] Furthermore, in a specific implementation, in the particulate matter detection device provided in the embodiments of the present invention, the controller can be used to reduce the wind speed of the ventilation component 1 when the particulate matter concentration fed back by the processor 4 exceeds the maximum concentration threshold; and to increase the wind speed of the ventilation component 1 when the particulate matter concentration fed back by the processor 4 is less than the minimum concentration threshold.

[0075] In implementation, the controller can dynamically adjust the airflow speed of ventilation component 1 based on the comparison between the particulate matter concentration fed back by processor 4 and the concentration threshold. This concentration threshold includes a maximum concentration threshold and a minimum concentration threshold. Specifically, when the particulate matter concentration fed back by processor 4 is greater than the maximum concentration threshold, processor 4 can send a reduction command to the controller, which adjusts the airflow speed of ventilation component 1 to decrease to between the maximum and minimum concentration thresholds. Conversely, when the particulate matter concentration fed back by processor 4 is less than the minimum concentration threshold, processor 4 can send a reduction command to the controller, which adjusts the airflow speed of ventilation component 1 to increase to between the maximum and minimum concentration thresholds. In this way, by controlling the airflow speed of ventilation component 1, the detection of ultra-low or ultra-high concentration particulate matter can be achieved, while maintaining the proper functioning of the system.

[0076] It should be added that, in this invention, after a unit of time or when the sensor pixel unit is largely blocked and affects detection, the surface of the light-transmitting sheet 3 can be cleaned by high-speed airflow to avoid affecting the accuracy of subsequent detection.

[0077] Furthermore, in a specific implementation, in the particulate matter detection device provided in the embodiments of the present invention, the ventilation component 1 can be located near the airflow inlet A of the particulate matter detection device; the light source 2 is disposed between the ventilation component 1 and the light-transmitting sheet 3.

[0078] In implementation, such as Figure 1 As shown, the particulate matter detection device provided in this embodiment of the invention includes a housing. The top of the housing has an airflow inlet A for the particulate matter detection device, and the bottom of the housing has an airflow outlet B for the particulate matter detection device. A ventilation assembly 1, a light source 2, a light-transmitting sheet 3, a detector, a processor 4, and a controller are all disposed inside the housing. The ventilation assembly 1 is closest to the airflow inlet A. The light source 2 is disposed on the side of the ventilation assembly 1 away from the airflow inlet A, and the light-transmitting sheet 3 is disposed on the side of the light source 2 away from the ventilation assembly 1. That is, the light source 2 is disposed between the ventilation assembly 1 and the light-transmitting sheet 3, which ensures that all the light generated by the light source 2 can illuminate the light-transmitting sheet 3, unaffected by the ventilation assembly 1. The specific positions of the processor 4 and the controller inside the housing are not limited.

[0079] In the above embodiments, the particulate matter detection device has been described in detail. Based on the same inventive concept, the embodiments of the present invention also provide a detection method for the particulate matter detection device and corresponding embodiments for purification equipment.

[0080] Figure 2 This is a flowchart illustrating the detection method of the particulate matter detection device provided in this embodiment of the invention. The detection method of the particulate matter detection device provided in this embodiment is as follows: Figure 2 As shown, the specific steps include:

[0081] S201, The light source generates light and illuminates the light-transmitting sheet.

[0082] In possible implementations, the light source can be a light-emitting diode (LED) light source or other light sources, as long as they can generate light and illuminate the surface of the light-transmitting sheet.

[0083] S202, The ventilation component directs airborne particles to the light-transmitting sheet, where the particles block at least part of the light.

[0084] In a possible implementation, the ventilation component can be a fan that directs airborne particles to the surface of the detector. This causes the particles to block at least some of the light, thereby obscuring at least a portion of the pixel units of the light-transmitting sheet. The detector, a device for sensing changes in light intensity and converting light signals into electrical signals, comprises high-density, small-sized pixel units and can be a complementary metal-oxide-semiconductor image sensor, a charge-coupled device image sensor, or other detectors.

[0085] S203, The detector detects the pixel units on the light-transmitting film.

[0086] In the detection method of the particulate matter detection device provided in the embodiments of the present invention, by executing the above steps S201 to S203, light is generated by a light source and irradiated onto a light-transmitting sheet. A ventilation component guides particulate matter in the air to the light-transmitting sheet. The particulate matter will block at least part of the light. The detector detects the pixel units on the light-transmitting sheet. In this way, all particulate matter guided to the light-transmitting sheet can be accurately identified by the detector, thereby achieving accurate measurement of particulate matter, significantly improving the accuracy and resolution of particulate matter detection, and enabling accurate detection of particulate matter larger than 10 μm, thus overcoming the problem of limited dynamic range of laser scattering schemes.

[0087] Since the embodiments of the detection method section correspond to the embodiments of the particulate matter detection device section, please refer to the description of the embodiments of the particulate matter detection device section for the embodiments of the detection method section, and will not be repeated here. Furthermore, it has the same beneficial effects as the particulate matter detection device mentioned above.

[0088] Furthermore, in a specific implementation, the detection method of the particulate matter detection device provided in the embodiments of the present invention may further include: the processor acquiring the characteristics and / or total quantity value of particulate matter through the detection signal of the detector.

[0089] Furthermore, in a specific implementation, the detection method of the particulate matter detection device provided in the embodiments of the present invention may further include: the controller regulating the wind speed of the ventilation component and sending the wind speed value of the ventilation component to the processor; the processor detecting the concentration of particulate matter based on the total number of particulate matter and the wind speed value of the ventilation component.

[0090] In the above steps, the controller adjusts the airflow speed of the ventilation component, which may specifically include: when the particulate matter concentration fed back by the processor exceeds the maximum concentration threshold, the controller reduces the airflow speed of the ventilation component 1; when the particulate matter concentration fed back by the processor is less than the minimum concentration threshold, the controller increases the airflow speed of the ventilation component 1.

[0091] For more detailed information on the working process of each of the above steps, please refer to the relevant content disclosed in the foregoing embodiments, which will not be repeated here.

[0092] Based on the same inventive concept, embodiments of the present invention also provide a purification device, including the above-mentioned particulate matter detection device, a filter screen disposed at the airflow outlet of the particulate matter detection device, and a fan component on the side of the filter screen away from the particulate matter detection device.

[0093] Figure 3 This is a schematic diagram of the purification equipment provided in an embodiment of the present invention. Figure 3 As shown, the purification equipment may include the aforementioned particulate matter detection device, a filter 5 disposed at the airflow outlet D of the particulate matter detection device, and a fan component 6 on the side of the filter away from the particulate matter detection device. The purification equipment includes a housing with an airflow inlet C at the top and an airflow outlet D at the bottom. The airflow inlet A of the particulate matter detection device is located near the airflow inlet C of the purification equipment. The particulate matter detection device, filter 5, and fan component 6 are all disposed inside the purification equipment housing. Specifically, the particulate matter detection device may be fixed to one side of the purification equipment housing. The airflow outlet D of the particulate matter detection device faces the filter 5 of the purification equipment, while the fan component 6 may be disposed near the airflow outlet D of the purification equipment; that is, the filter 5 may be disposed between the particulate matter detection device and the fan component 6.

[0094] Since the principle by which this purification device solves the problem is similar to that of the aforementioned particulate matter detection device, the implementation of this purification device can be referred to the implementation of the particulate matter detection device, and the repeated parts will not be described again.

[0095] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0096] Finally, it should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising," "including," and "having," and any other variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. In this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0097] For the foregoing embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0098] Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on these embodiments without inventive effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add to, delete from, or otherwise adjust the features of the various embodiments of the present invention as appropriate without conflict or inventive effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions are also within the scope of protection of the present invention.

[0099] The particulate matter detection device, detection method, and purification equipment provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this invention, and are not intended to limit the scope of protection of the invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A particulate matter detection device, characterized in that, include: Translucent sheet; A light source, used to generate light and illuminate the light-transmitting sheet; A ventilation assembly for directing airborne particulate matter to the light-transmitting sheet, the particulate matter blocking at least a portion of the light; The detector is configured to detect pixel units on the light-transmitting sheet.

2. The particulate matter detection device according to claim 1, characterized in that, Also includes: A processor is configured to acquire the characteristics and / or total quantity value of the particulate matter through the detection signal of the detector.

3. The particulate matter detection device according to claim 2, characterized in that, The processor is also used to distinguish the types of particles based on the obtained contour features and particle size of the particles.

4. The particulate matter detection device according to claim 2, characterized in that, Also includes: The controller is electrically connected to both the ventilation component and the processor, and is used to regulate the wind speed of the ventilation component and send the wind speed value of the ventilation component to the processor. The processor is further configured to detect the concentration of the particulate matter based on the total number of the particulate matter and the wind speed of the ventilation component.

5. The particulate matter detection device according to claim 4, characterized in that, The controller is configured to reduce the airflow speed of the ventilation component when the concentration of the particulate matter fed back by the processor exceeds a maximum concentration threshold, and to increase the airflow speed of the ventilation component when the concentration of the particulate matter fed back by the processor is less than a minimum concentration threshold.

6. The particulate matter detection device according to claim 1, characterized in that, The ventilation assembly is located near the airflow inlet of the particulate matter detection device; The light source is positioned between the ventilation assembly and the light-transmitting sheet.

7. A detection method for a particulate matter detection device, characterized in that, include: The light source produces light and shines onto the light-transmitting sheet; The ventilation assembly directs airborne particles toward the light-transmitting sheet, and the particles block at least part of the light. The detector detects the pixel units on the light-transmitting sheet.

8. The detection method of the particulate matter detection device according to claim 7, characterized in that, Also includes: The processor acquires the characteristics and / or total quantity value of the particulate matter through the detection signal of the detector.

9. The detection method of the particulate matter detection device according to claim 8, characterized in that, Also includes: The controller regulates the airflow speed of the ventilation component and sends the airflow speed value of the ventilation component to the processor; The processor detects the concentration of the particulate matter based on the total number of particulate matter and the wind speed of the ventilation component.

10. A purification device, characterized in that, include: The particulate matter detection device according to any one of claims 1 to 6 includes a filter screen disposed at the airflow outlet of the particulate matter detection device and a fan component on the side of the filter screen away from the particulate matter detection device.

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