Air inlet system of detection equipment, control method of air inlet system and detection equipment

Abstract

The invention discloses an air inlet system of detection equipment, the detection equipment and a control method of the air inlet system.The air inlet system of the detection equipment comprises a pipeline assembly, a first filtering assembly and a second filtering assembly, and the pipeline assembly is provided with a first air channel and a second air channel which are connected in parallel; the pipeline assembly is configured to control airflow to selectively pass through the first air channel and / or the second air channel; the first filter assembly is arranged in the first air channel and comprises an automatic filter membrane replacing device; the second filtering assembly is arranged on the second air channel. According to the air inlet system of the detection equipment, the pipeline assembly which can be selectively communicated with the first air channel and the second air channel is arranged, and the filter assemblies are arranged in the first air channel and the second air channel, so that the flexibility during application can be improved; therefore, gas is continuously filtered, and the filtering efficiency and the filtering effect are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment, and in particular to an air intake system of a detection device, a detection device, and a control method of the air intake system. Background Art

[0002] The gas analyzer uses a filter membrane to filter particles in the air at the air inlet, which is in direct contact with the outside air. Therefore, after a period of use, the particles deposited on the filter membrane will increase the pressure of the system and affect the flow pressure value of the system. At this time, a new filter membrane must be replaced. When replacing the filter membrane, you need to unscrew the fixed cover of the air filter; remove the air filter paper holder and replace the clean filter membrane. In general, the air filter of each device needs to be replaced once a week, which increases the cost of using the instrument, and when replacing the filter membrane, it is necessary to stop working, which reduces the air filtration efficiency. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide an air intake system of a detection device with a pipeline assembly, which can improve the flexibility during filtering and improve the filtering efficiency.

[0004] Another object of the present invention is to provide a detection device, comprising the aforementioned air intake system.

[0005] Another object of the present invention is to provide an air intake method for an air intake system of a detection device, which is used for the aforementioned air intake system.

[0006] According to an embodiment of the present invention, the air intake system of the detection device includes: a pipeline assembly, a first filter assembly and a second filter assembly, the pipeline assembly having a first airway and a second airway connected in parallel, and the pipeline assembly is configured to control the airflow to selectively pass through the first airway and / or the second airway; the first filter assembly is arranged in the first airway, and the first filter assembly includes an automatic filter membrane replacement device; the second filter assembly is arranged in the second airway.

[0007] The air intake system of the detection equipment according to the embodiment of the present invention can improve flexibility in application by providing a pipeline component that can selectively connect the first airway and the second airway, and filter components are provided in the first airway and the second airway. When the membrane of one of the filter components is replaced, the other airway is connected to achieve uninterrupted filtering of the gas, thereby improving filtering efficiency and filtering effect.

[0008] In addition, the air intake system of the detection device according to the above embodiment of the present invention may also have the following additional technical features:

[0009] In some examples of the present invention, the pipeline assembly includes a reversing device, which has an inlet, a first outlet, and a second outlet. The reversing device is configured to control the inlet to selectively connect the first outlet and / or the second outlet, the first outlet is connected to the inlet of the first filter assembly, and the second outlet is connected to the inlet of the second filter assembly.

[0010] In some examples of the present invention, the automatic filter membrane replacement device includes a mounting seat and a membrane changing mechanism, the mounting seat has an air flow channel extending along a first direction, and the membrane changing mechanism is configured to drive the filter membrane to move along a second direction to control different positions of the filter membrane to separate the air flow channel, and the first direction is perpendicular to the second direction.

[0011] In some examples of the present invention, the membrane changing mechanism includes a first rotating wheel and a second rotating wheel, the first rotating wheel and the second rotating wheel are arranged on opposite sides of the mounting seat along the second direction, and the axes of the first rotating wheel and the second rotating wheel extend along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0012] In some examples of the present invention, the film changing mechanism includes a storage wheel, a collection wheel and a tensioning wheel, the storage wheel is sleeved on the first rotating wheel, the collection wheel is sleeved on the second rotating wheel, and the tensioning wheel is arranged between the storage wheel and the mounting seat and / or the collection wheel and the mounting seat.

[0013] In some examples of the present invention, the first rotating wheel and / or the second rotating wheel are connected to a first motor along the third direction.

[0014] In some examples of the present invention, the tensioning wheel includes a first roller, a second roller and a third roller, the first roller and the second roller are arranged on opposite sides of the mounting seat along the second direction, the first roller and the storage wheel are arranged at intervals along the first direction, and the second roller and the third roller are arranged at intervals along the first direction with the collecting wheel.

[0015] In some examples of the present invention, the mounting base includes a first part and a second part, and the first part and the second part can detachably clamp the filter membrane; the first part has a first cavity, and the second part has a second cavity, and the first cavity and the second cavity are connected to construct the airflow channel.

[0016] In some examples of the present invention, the automatic filter membrane replacement device further includes a first pressure detector and a second pressure detector, wherein the first pressure detector is connected to the first chamber, and the second pressure detector is connected to the second chamber.

[0017] In some examples of the present invention, the automatic filter membrane replacement device also includes a grayscale detector for detecting the color of the filter membrane, the grayscale detector is arranged in the first part and connected to the first cavity, and the grayscale detector is opposite to the filter membrane along the first direction.

[0018] In some examples of the present invention, the second portion includes a first half, a second half, and an elastic member, the first half and the second half are connected along the first direction, and the elastic member is supported between the first half and the second half.

[0019] In some examples of the present invention, the mounting base includes a second motor, and the first portion and / or the second portion is connected to the second motor.

[0020] In some examples of the present invention, the second part is provided with a support net for preventing the filtering membrane and a seal, and the seal constructs a sealing structure between the outer periphery of the support net and the inner wall of the second part.

[0021] In some examples of the present invention, the second filter component is configured as a fixed filter component.

[0022] In some examples of the present invention, the air intake system further includes a first check valve, which is disposed in the first air passage and located downstream of the first filter assembly.

[0023] In some examples of the present invention, the air intake system further includes a second check valve, which is disposed in the second air passage and located downstream of the second filter assembly.

[0024] The detection device according to the embodiment of the present invention includes the aforementioned air intake system.

[0025] According to the detection equipment of the embodiment of the present invention, by applying the aforementioned air intake system, the filter membrane of the detection equipment can be automatically replaced, and the detection equipment can work uninterruptedly during the membrane replacement, which is beneficial to improving the working efficiency and filtering effect of the detection equipment and reducing the cost of manual maintenance.

[0026] A control method for an air intake system of a detection device according to an embodiment of the present invention is used for the aforementioned air intake system, and the method includes: obtaining a filter membrane replacement signal of the first filter component; according to the filter membrane replacement signal, controlling the pipeline component to disconnect the first airway and connect the second airway, and controlling the filter membrane automatic replacement device to replace the filter membrane; after determining that the filter membrane automatic replacement device has completed the filter membrane replacement, controlling the pipeline component to connect the first airway and disconnect the second airway.

[0027] According to the control method of the air intake system of the detection device of the embodiment of the present invention,

[0028] In some examples of the present invention, the air intake system includes a pressure detector, and the control method further includes: the air intake system obtains an initial pressure parameter value and a current pressure parameter value of the filter membrane; if the difference between the initial pressure parameter value and the current pressure parameter value is greater than or equal to a preset value, a filter membrane replacement signal for the first filter component is generated.

[0029] In some examples of the present invention, the air intake system includes a grayscale detector, and the control method further includes: the air intake system obtains an initial grayscale parameter value L0 and a current grayscale parameter value L1 of the filter membrane; if the initial grayscale parameter value L0 and the current grayscale parameter value L1 satisfy L1≤1 / 2*L0, a filter membrane replacement signal for the first filter component is generated.

[0030] In some examples of the present invention, the method further includes: obtaining a start signal of an intake system of the detection device; and controlling the automatic filter membrane replacement device to replace the filter membrane according to the start signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of an air intake system of a detection device in some embodiments of the present invention (showing a state where the reversing device is connected to the first air passage);

[0032] Figure 2 is a schematic diagram of an air intake system of a detection device in some embodiments of the present invention (showing a state where the reversing device is connected to the second air passage);

[0033] Figure 3 is a front view of an air intake system of a detection device in some embodiments of the present invention;

[0034] Figure 4 is a schematic diagram of the structure of an air intake system of a detection device in some embodiments of the present invention;

[0035] Figure 5 is a cross-sectional view of an air intake system of a detection device in some embodiments of the present invention;

[0036] Figure 6 is a rear view of an air intake system of a detection device in some embodiments of the present invention;

[0037] Figure 7 It is a partial structural assembly diagram of the air intake system of the detection device in some embodiments of the present invention (showing the mounting base and the ash detection detector).

[0038] Reference numerals:

[0039] 100, air intake system; 10, control panel; 110, first air passage; 120, second air passage; 13, reversing device; 103, inlet; 101, first outlet; 102, second outlet; 105, air outlet; 20, first filter assembly; 21, mounting seat; 210, air flow channel; 211, first part; 201, first cavity; 212, second part; 202, second cavity; 2121, first half; 2122, second half; 2123, elastic member; 2124, fixing member; 213, fixing plate; 214, second motor; 215, support net; 216, seal; 22, membrane changing mechanism; 221, first rotating wheel; 222, second rotating wheel; 223, storage wheel; 224, collecting wheel; 225, first roller; 226, second roller; 227, third roller; 228, first motor; 23, first pressure detector; 24, second pressure detector; 25, grayscale detector; 31, first check valve; 32, second check valve; 40, second filter assembly; 51, grating; 52, optical coupler; 200, filter membrane. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0041] Combination Figure 1 and Figure 2 The air intake system 100 of the detection device according to the embodiment of the present invention comprises: a pipeline component, a first filter component 20 and a second filter component 40, the pipeline component has a first airway 110 and a second airway 120 connected in parallel, and the pipeline component is configured to control the airflow to selectively pass through the first airway 110 and / or the second airway 120; the first filter component 20 is arranged in the first airway 110; and the second filter component 40 is arranged in the second airway 120. Specifically, the pipeline component can selectively connect the first airway 110 or the second airway 120, thereby, the pipeline component connects the first airway 110 and closes the second airway 120, and the gas can flow into the first airway 110 and be filtered by the first filter component 20 inside, and the pipeline component can also connect the second airway 120 and close the first airway 110, and the gas can flow into the second airway 120 and be filtered by the second filter component 40 inside. Alternatively, the pipeline component simultaneously connects the first airway 110 and the second airway 120, so that the gas can be filtered by the first filter component 20 and the second filter component 40 at the same time. In this way, the flexibility of air intake can be improved, and it can be flexibly adjusted according to actual application conditions.

[0042] More specifically, the first filter assembly 20 includes an automatic replacement device for the filter membrane 200, that is, the first filter assembly 20 can realize automatic replacement of the filter membrane 200. Specifically, after the filter membrane 200 has been used for a period of time, the particles deposited on the filter membrane 200 will increase the pressure of the system and affect the flow pressure value of the system. In order to improve the filtering efficiency and filtering effect, it is often necessary to replace a new filter membrane 200. By setting an automatic replacement device, the filter membrane 200 can be automatically replaced without disassembling the device for manual replacement, thereby reducing maintenance costs and improving filtering efficiency. Therefore, under normal circumstances, the pipeline component can be connected to the first airway 110 to allow more gas to flow through the first filter component 20 in the first airway 110 for filtration, and when the first filter component 20 needs to change the membrane, the first airway 110 can be disconnected and the second airway 120 can be connected. Therefore, when the first filter component 20 changes the membrane, the gas can be filtered through the second filter component 40 of the second airway 120. After the membrane change of the first filter component 20 is completed, the pipeline component can disconnect the second airway 120 and connect the first airway 110. Therefore, during the membrane change of the filter component, the gas can also be continuously filtered, which is beneficial to improve the filtration efficiency.

[0043] According to the air intake system 100 of the detection equipment according to the embodiment of the present invention, by providing a pipeline component that can selectively connect the first air duct 110 and the second air duct 120, and filtering components are provided in the first air duct 110 and the second air duct 120, the flexibility in application can be improved. When the membrane of one of the filter components is replaced, the other air duct is connected to realize uninterrupted filtering of the gas, thereby improving the filtering efficiency and filtering effect.

[0044] Optionally, at least one of the first filter assembly 20 and the second filter assembly 40 may include an automatic replacement device for the filter membrane 200. In other words, the second filter assembly 40 may also include an automatic replacement assembly for the filter membrane 200. In this way, when the filtering efficiency needs to be improved, the first airway 110 and the second airway 120 may be opened at the same time, and both the first filter assembly 20 and the second filter assembly 40 perform filtering to improve the filtering efficiency.

[0045] According to the air intake system 100 of the detection device of the embodiment of the present invention, the first filter assembly 20 includes an automatic replacement device for the filter membrane 200, and the second filter assembly 40 includes a fixed filter device, which can improve the filtering efficiency while simplifying the structure and reducing the operating cost. Specifically, when the filter membrane 200 is replaced, it is necessary for professionals to perform manual operation, which consumes a lot of manpower and material resources, and when the filter membrane 200 is replaced, the detection device cannot work, resulting in reduced filtering efficiency and increased operating costs. By setting an automatic replacement device in the first filter assembly 20, the filter membrane 200 can be automatically replaced without manual operation, which is conducive to reducing operating costs. In addition, when the filter membrane 200 is replaced, the air intake can be switched to the fixed filter device for uninterrupted filtering. Since the filter membrane 200 automatic replacement device can replace the membrane quickly, it can generally be replaced within thirty seconds to one minute, and it takes a period of time to replace it again. Therefore, the actual use of the second filter assembly 40 for filtering and the amount of gas passing through are small. In this way, the replacement cycle of the second filter assembly 40 will be greatly extended. Therefore, the second filter assembly 40 is set as a fixed filter, which will not affect the filtering efficiency and filtering effect. In actual application, the second filter assembly 40 may be replaced simultaneously with the first filter assembly 20, or the replacement cycle of the second filter assembly 40 may be longer.

[0046] Combination Figure 1 and Figure 6 In some embodiments of the present invention, the pipeline assembly includes a reversing device 13, the reversing device 13 has an inlet 103, a first outlet 101 and a second outlet 102, and the reversing device 13 is configured to control the inlet 103 to selectively connect the first outlet 101 and / or the second outlet 102, the first outlet 101 is connected to the inlet of the first filter assembly 20, and the second outlet 102 is connected to the inlet of the second filter assembly 40. Specifically, the reversing device 13 can connect the inlet 103 and the first outlet 101, so that the gas enters from the inlet 103 and then flows out from the first outlet 101 and enters the first filter assembly 20 for filtering. The reversing device 13 can connect the inlet 103 and the second outlet 102, so that the gas enters from the inlet 103 and then flows out from the second outlet 102 and enters the second filter assembly 40 for filtering. Alternatively, the reversing device 13 can connect the inlet 103, the first outlet 101 and the second outlet 102 at the same time, so that the first filter assembly 20 and the second filter assembly 40 can filter the gas at the same time. The reversing device 13 can also disconnect the inlet 103 from the first outlet 101 and the second outlet 102 at the same time to suspend the filtering operation.

[0047] Optionally, the reversing device 13 can be a reversing valve, such as a three-way valve, or two switch valves, etc. For example, the reversing device 13 can include a first switch valve that can connect or disconnect the inlet 103 and the first outlet 101, and a second switch valve that connects or disconnects the inlet 103 and the second outlet 102, so as to achieve flexible adjustment of the flow path between the inlet 103 and the first outlet 101 and the second outlet 102.

[0048] Further, in some embodiments of the present invention, in combination Figure 1 and Figure 2 The automatic filter membrane replacement device includes a mounting seat 21 and a membrane replacement mechanism 22. The mounting seat 21 has an airflow channel 210 extending along a first direction. The membrane replacement mechanism 22 is configured to drive the filter membrane 200 to move along a second direction to control different positions of the filter membrane 200 to separate the airflow channel 210. The first direction is perpendicular to the second direction. Specifically, the mounting seat 21 can be used to assemble and fix the filter membrane 200. The airflow channel 210 in the mounting seat 21 is connected to the first airway 110. The airflow channel 210 extends along the first direction. The filter membrane 200 extends along the second direction and is arranged in the airflow channel 210. Therefore, the gas in the first airway 110 can enter the airflow channel 210 and pass through the filter membrane 200 for filtration. When the filter membrane 200 needs to be replaced, the filter membrane 200 moves in a direction perpendicular to the extension of the airflow channel 210, which can facilitate the movement of the filter membrane 200 and facilitate spatial arrangement.

[0049] In some embodiments of the present invention, Figure 5 The membrane changing mechanism 22 includes a first rotating wheel 221 and a second rotating wheel 222. The first rotating wheel 221 and the second rotating wheel 222 are arranged on opposite sides of the mounting seat 21 along the second direction, and the axes of the first rotating wheel 221 and the second rotating wheel 222 extend along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. Thus, the opposite ends of the filter membrane 200 along the second direction can be connected to the first rotating wheel 221 and the second rotating wheel 222 respectively. When the first rotating wheel 221 and the second rotating wheel 222 rotate, one of the first rotating wheel 221 and the second rotating wheel 222 rotates to release a new filter membrane 200 or a blank filter membrane 200, and the other rotates to retract an old filter membrane 200 or a used filter membrane 200, thereby realizing automatic membrane changing.

[0050] It should be noted that the first direction can refer to Figure 3 The up and down directions in the second direction can refer to Figure 3 The left and right directions in the third direction can refer to Figure 4 The front-to-back direction is not limited to this.

[0051] Specifically, combined Figure 1 and Figure 5In some embodiments of the present invention, the membrane replacement mechanism 22 includes a storage wheel 223 and a collection wheel 224, wherein the storage wheel 223 is sleeved on the first rotating wheel 221, and the collection wheel 224 is sleeved on the second rotating wheel 222. That is, the storage wheel 223 and the collection wheel 224 can be detachably connected to the first rotating wheel 221 and the second rotating wheel 222, and the filter membrane 200 can be wound on the storage wheel 223. After the storage wheel 223 is installed on the first rotating wheel 221, the first rotating wheel 221 rotates to gradually release the filter membrane 200, and when the second rotating wheel 222 rotates, the collection wheel 224 can roll up the filter membrane 200. In actual application, the storage wheel 223 can be an independent product. After the filter membrane 200 on the storage wheel 223 is exhausted, a new storage wheel 223 can be manually replaced, and the collection wheel 224 wound with the used filter membrane 200 can be recycled, thereby extending the replacement cycle of the first filter assembly 20, simplifying the membrane replacement operation, and bringing convenience to the operation and maintenance of the equipment.

[0052] More specifically, combined with Figure 6 In some embodiments of the present invention, at least one of the first rotating wheel 221 and the second rotating wheel 222 may be connected to the first motor 228 to drive the rotating wheel to rotate, and the first motor 228 is connected to the rotating wheel along the third direction. For example, the first rotating wheel 221 and the second rotating wheel 222 may both be connected to the motor, or the first motor 228 may be only provided at the rotating wheel corresponding to the collecting wheel 224, so that the collecting wheel 224 is rotated to rotate, and the collecting wheel 224 winds the filter membrane 200 on the collecting wheel 224, and the driving force of the collecting wheel 224 drives the filter membrane 200 to move in the direction of the collecting wheel 224, thereby driving the storage wheel 223 to rotate to release the blank filter membrane 200 wound on the storage wheel 223, thereby realizing the automatic replacement and automatic collection of the filter membrane 200, and facilitating the simplification of the structure.

[0053] Furthermore, the membrane changing mechanism 22 also includes a tensioning wheel, which is arranged between the storage wheel 223 and the mounting seat 21 and / or the collection wheel 224 and the mounting seat 21, and can maintain the tension between the two opposite sides of the filter membrane 200 along the second direction and the collection wheel 224 and the storage wheel 223, thereby improving the stability of the membrane changing mechanism 22 during operation, which is beneficial to improving the transmission efficiency and keeping the filter membrane 200 in a flat state.

[0054] Furthermore, the tension wheel may include multiple ones to improve the structural stability. Figure 4 and Figure 5The tensioning wheel may include a first roller 225, a second roller 226 and a third roller 227. The first roller 225 and the second roller 226 are arranged on opposite sides of the mounting seat 21 along the second direction. The first roller 225 and the storage wheel 223 are arranged at intervals along the first direction. The second roller 226 and the third roller 227 are arranged at intervals along the first direction with the collection wheel 224. That is, two rollers are arranged between the collection wheel 224 and the mounting seat 21. The two rollers are arranged at intervals along the first direction and staggered along the second direction. In this way, after the filter membrane 200 is removed from the mounting seat 21, it can first pass through the second roller 226 and then pass through the third roller 227 and then be wound on the collection wheel 224. The filter membrane 200 forms a "Z"-shaped structure between the second roller 226 and the third roller 227, which can improve the tensioning effect and the stability of the collection filter membrane 200. The first roller 225 provided between the storage wheel 223 and the mounting seat 21 can also ensure that the filter membrane 200 can enter the mounting seat 21 stably and smoothly.

[0055] Combination Figure 3 The bottom of the first roller 225 and the second roller 226 are both located at the same horizontal line as the installation position of the filter membrane 200 in the mounting seat 21, thereby, the filter membrane 200 can be smoothly moved into or out of the mounting seat 21, and the top of the third roller 227 is located at the same horizontal line as the bottom of the collecting wheel 224, thereby, the stability of the filter membrane 200 when it is rolled into the collecting wheel 224 can be improved.

[0056] Combination Figure 4 and Figure 5 In some embodiments of the present invention, the mounting seat 21 includes a first portion 211 and a second portion 212. The first portion 211 and the second portion 212 can detachably clamp the filter membrane 200. When the operating system is running, the filter membrane 200 can be clamped to improve the filtering effect, and when the filter membrane 200 needs to be replaced, it can be opened to facilitate the movement of the filter membrane 200. Specifically, the first portion 211 has a first cavity 201, and the second portion 212 has a second cavity 202. The first cavity 201 and the second cavity 202 are connected to form an airflow channel 210. When the first portion 211 and the second portion 212 clamp the filter membrane 200, the filter membrane 200 can separate the airflow channel 210, so that the gas needs to be filtered by the filter membrane 200 when it moves from the first cavity 201 to the second cavity 202.

[0057] Combination Figure 4In some embodiments of the present invention, the automatic filter membrane replacement device also includes a first pressure detector 23 and a second pressure detector 24. The first pressure detector 23 is connected to the first cavity 201, and the second pressure detector 24 is connected to the second cavity 202. Thus, the first pressure detector 23 can detect the air pressure of the gas in the first cavity 201, that is, the air pressure of the gas before filtration, and the second pressure detector 24 can detect the air pressure of the gas in the second cavity 202, that is, the air pressure of the gas after filtration, and then determine the usage status of the filter membrane 200. For example, when the difference between the pressure value detected by the second pressure detector 24 and the pressure value detected by the first pressure detector 23 is greater than or equal to a predetermined value, that is, more particles are accumulated on the filter membrane 200, resulting in a higher system pressure, and the filter membrane 200 replacement operation is performed. At this time, the first part 211 and the second part 212 of the mounting seat 21 can be controlled to separate to loosen the filter membrane 200, and the motor drives the collection wheel 224 to rotate so that the filter membrane 200 is collected, and drives the storage wheel 223 to rotate to release the blank filter membrane 200 to the mounting seat 21, and drives the first part 211 and the second part 212 of the mounting seat 21 to move to clamp the filter membrane 200. Therefore, by arranging the first pressure detector 23 and the second pressure detector 24 on opposite sides of the filter membrane 200, the state before and after gas filtration can be detected, so as to judge the use state of the filter membrane 200, and the detection effect is more accurate, which is conducive to improving the filtration efficiency.

[0058] Specifically, combined Figure 4 and Figure 6 The intake system 100 includes a control board 10, and a first pressure detector 23 includes a first pipe and a first pressure sensor. The first end of the first pipe is connected to the first cavity 201, and the second end is connected to the first pressure sensor. The first end of the first pipe is arranged on one side of the control board 10 along the third direction, and the first pressure sensor can be arranged on the other side of the control board 10 along the third direction to facilitate space arrangement. Similarly, the second pressure detector 24 includes a second pipe and a second pressure sensor. The second end of the second pipe is connected to the second cavity 202, and the second end is connected to the second pressure sensor. The second end of the second pipe is arranged on one side of the control board 10 along the third direction, and the second pressure sensor can be arranged on the other side of the control board 10 along the third direction.

[0059] Combination Figure 5In some embodiments of the present invention, the automatic filter membrane replacement device further includes a grayscale detector 25 for detecting the color of the filter membrane 200. The grayscale detector 25 is disposed in the first portion 211 and communicates with the first cavity 201. The grayscale detector 25 is opposite to the filter membrane 200 along a first direction, and can be convenient for detecting the use status of the filter membrane 200, thereby determining whether a membrane replacement operation is required. Specifically, after the filter membrane 200 has been used for a period of time, the color of the filter membrane 200 will become darker due to the increase of sediment. The grayscale detector 25 can detect the color of the filter membrane 200. When the color of the filter membrane 200 reaches a predetermined value, the filter membrane 200 replacement operation is performed.

[0060] Combination Figure 4 The air intake system 100 may have a pressure detector for detecting pressure and a grayscale detector 25 for detecting the color of the filter membrane 200. When one of the pressure detection value and the grayscale detection value reaches a preset value, the membrane replacement mechanism 22 is controlled to perform a membrane replacement operation to improve reliability. Since the specifications of different filter membranes 200, such as colors, are different, the adaptability of the air intake system 100 can be improved by performing detection through a variety of detection devices. Alternatively, the preset value can be set and adjusted according to filter membranes 200 of different specifications. For example, when installing the filter membrane 200A, the preset membrane replacement parameter is adjusted to a, and when installing the filter membrane 200B, the preset membrane replacement parameter is adjusted to b to improve adaptability. Alternatively, a preset value for replacing the filter membrane 200 is selected according to the parameters and specifications of the filter membrane 200.

[0061] Combination Figure 5 and Figure 7 In some embodiments of the present invention, the second part 212 includes a first half 2121, a second half 2122 and an elastic member 2123. The first half 2121 and the second half 2122 can be connected along a first direction by a fixing member 2124. The elastic member 2123 is supported between the first half 2121 and the second half 2122. Thus, the elastic member 2123 can be supported between the first half 2121 and the second half 2122. The elastic member 2123 extends along the first direction. The elastic force of the elastic member 2123 can provide support force for the second part 212 when the second part 212 clamps the filter membrane 200, thereby improving the clamping effect of the mounting seat 21, which is beneficial to ensure that all gases are filtered through the filter membrane 200.

[0062] Further, in some embodiments of the present invention, in combination Figure 6, the mounting base 21 includes a second motor 214, and the first part 211 and / or the second part 212 are connected to the second motor 214. The second motor 214 can be used to drive the first part 211 or the second part 212 to move closer to or away from each other, so as to drive the first part 211 or the second part 212 to clamp or release the filter membrane 200. Specifically, both the first part 211 and the second part 212 can be connected to the motor, or one of them can be connected to the motor. According to the mounting base 21 of the embodiment of the present invention, the second motor 214 is transmission-connected with the second part 212 along a third direction, driving the second part 212 to move closer to or away from the first part 211 along the first direction. Specifically, the intake system 100 also includes a fixing plate 213, and the second motor 214 is fixed to the control board 10 through the fixing plate 213, which is conducive to improving the stability of the connection between the second motor 214 and the mounting base 21.

[0063] Combination Figure 5 In some embodiments of the present invention, the second part 212 is provided with a support net 215 and a seal 216 for preventing the filter membrane 200 from leaking. The support net 215 can improve the stability of the filter membrane 200 after placement, and can also be used when the pressure in the airway is too high. The seal 216 constructs a sealing structure between the outer periphery of the support net 215 and the inner wall of the second part 212, which can improve the sealing effect, prevent gas leakage from passing through the filter membrane 200, and thus improve the filtering effect and the stability of the structure.

[0064] Combination Figure 1 and Figure 2 In some embodiments of the present invention, the air intake system 100 further includes a first check valve 31, which is disposed in the first air passage 110 and is located downstream of the first filter assembly 20. The air intake system 100 further includes a second check valve 32, which is disposed in the second air passage 120 and is located downstream of the second filter assembly 40. The first check valve 31 and the second check valve 32 can prevent gas from flowing back. Specifically, the first check valve 31 is disposed between the first air passage 110 and the gas outlet 105, and the second check valve 32 is disposed between the second air passage 120 and the gas outlet 105. The first check valve 31 allows gas to flow unidirectionally from the downstream of the first filter assembly 20 to the gas outlet 105, and the second check valve 32 allows gas to flow unidirectionally from the downstream of the second filter assembly 40 to the gas outlet 105, thereby improving the stability and reliability of the operation of the air intake system 100.

[0065] The detection device according to the embodiment of the present invention includes the aforementioned air intake system 100, which can realize automatic replacement of the filter membrane 200 of the detection device, and the detection device can work uninterruptedly during the membrane replacement, which is beneficial to improving the working efficiency and filtering effect of the detection device and reducing the cost of manual maintenance.

[0066] Combination Figure 1 and Figure 2 , according to the control method of the air intake system 100 of the detection device of the embodiment of the present invention, used for the aforementioned air intake system 100, the method comprises: obtaining the filter membrane 200 replacement signal of the first filter assembly 20; according to the filter membrane 200 replacement signal, controlling the pipeline assembly to disconnect the first airway 110 and connect the second airway 120, and controlling the filter membrane 200 automatic replacement device to replace the filter membrane 200; after determining that the filter membrane 200 automatic replacement device has completed the replacement of the filter membrane 200, controlling the pipeline assembly to connect the first airway 110 and disconnect the second airway 120. Specifically, since the expected filtering effect cannot be achieved during the membrane replacement, the pipeline assembly can automatically disconnect the first airway 110 and connect the second airway 120 when the first filter assembly 20 is replaced, so that the gas can enter the second airway 120 and be filtered by the second filter assembly 40. When the membrane replacement of the first filter assembly 20 is completed, the pipeline assembly disconnects the second airway 120 and connects the first airway 110, and uses the first filter assembly 20 for filtering.

[0067] More specifically, since the first filter component 20 has an automatic replacement device for the filter membrane 200 that can realize automatic membrane replacement, the first airway 110 can be used as the main channel for filtering the gas. When the membrane of the first filter component 20 is replaced, the control pipeline component switches the gas to the second airway 120 according to the replacement signal of the filter membrane 200. Through the second airway 120 and the second filter component 40, the detection equipment can continue to perform filtering work during the membrane replacement.

[0068] According to the control method of the air intake system 100 of the detection device according to the embodiment of the present invention, the switching between the first airway 110 and the second airway 120 of the pipeline can be automatically controlled by judging the membrane change signal of the filter membrane 200 of the first filter component 20, so that the detection device can continue to perform filtering work during the membrane change, which is beneficial to improve the filtering effect.

[0069] Specifically, in combination with the above, when the filter membrane 200 of the first filter component 20 reaches the replacement standard, the filter membrane 200 replacement signal can be sent to the reversing device 13, the mounting seat 21 and the membrane changing mechanism 22 at the same time, and the reversing device 13 of the pipeline component disconnects the inlet 103 and the first outlet 101, and connects the inlet 103 and the second outlet 102, and the second outlet 102 is connected to the inlet of the second filter component 40. The first part 211 and the second part 212 of the mounting seat 21 are separated to loosen the filter membrane 200, and the collecting wheel 224 of the membrane changing mechanism 22 rotates to roll the used filter membrane 200 into the collecting wheel 224, and the storing wheel 223 releases the blank filter paper to the predetermined position of the mounting seat 21. The first part 211 and the second part 212 of the mounting seat 21 clamp the filter membrane 200, and the filter membrane 200 is automatically replaced, and a completion signal is sent to the reversing device 13, and the reversing device 13 disconnects the inlet 103 and the second outlet 102, and connects the inlet 103 and the first outlet 101, and the first outlet 101 is connected to the inlet of the first filter component 20.

[0070] Furthermore, combined with Figure 6 The air intake system 100 may further include a grating 51 and an optical coupler 52. The grating 51 and the optical coupler 52 may be used to determine the distance or size of movement of the filter membrane 200 to improve the accuracy of automatic membrane replacement. Specifically, the grating 51 may be connected to the first roller 225 along a third direction, and the optical coupler 52 may be connected to the grating 51 along a second direction, thereby achieving precise control of the movement size of the filter membrane 200.

[0071] Optionally, the first motor 228 connected to the collecting wheel 224 or the second rotating wheel 222 may be a stepping motor, which can accurately control the position and speed of the filter membrane 200 movement, thereby improving the accuracy of automatic membrane replacement. Alternatively, the blank filter membrane 200 wound on the storage wheel 223 may be in a continuous form, or the blank filter membrane 200 may have a predetermined size, and two blank filter membranes 200 may have a spacer. The size of the filter membrane 200 and the size of the spacer are input into the control program. When used, the stepping motor moves the filter membrane 200 according to the predetermined size so that the new filter membrane 200 can be exactly located at the predetermined position.

[0072] Combination Figure 1In some embodiments of the present invention, the air intake system 100 includes a pressure detector, and the control method further includes: the air intake system 100 obtains the initial pressure parameter value and the current pressure parameter value of the filter membrane 200; if the difference between the initial pressure parameter value and the current pressure parameter value is greater than or equal to a preset value, a filter membrane 200 replacement signal of the first filter component 20 is generated. Specifically, it can be determined whether the filter membrane 200 needs to be replaced by detecting the pressure. When the pressure value reaches a predetermined value, the automatic replacement device of the filter membrane 200 is controlled to automatically replace the membrane and send a membrane replacement signal to the management component. More specifically, the initial pressure parameter value of the filter membrane 200 is P IV , P IV is the difference between the detection value P2 of the second pressure detector 24 and the detection value P1 of the first pressure detector 23 when a blank filter membrane 200 is placed in the air flow channel 210. That is, P2-P1=P IV

[0073] During the operation of the device, combined with the above, since the first pressure detector 23 and the second pressure detector 24 are connected to the first cavity 201 and the second cavity 202 respectively, the first pressure detector 23 and the second pressure detector 24 can monitor the pressure value in the airflow channel 210 in real time. If the detection pressure of the first pressure detector 23 is P3, the pressure detection value of the second pressure detector 24 is P4, and the difference between P4 and P2 is the current pressure value in the airflow channel 210, P CV (i.e. P4-P2=P CV ), P CV The initial pressure value P of the filter membrane 200 IV When the difference is greater than or equal to 1.5Kpa (kilopascal), P CV -P IV ≥1.5Kpa, control the automatic replacement system of the filter membrane 200 to replace the membrane filter. Specifically, since the pressure of the blank membrane of different filter membranes 200 may be different, the current pressure value minus the initial pressure value can improve the accuracy of pressure detection, which is conducive to judging the use status of the filter membrane 200.

[0074] In some embodiments of the present invention, the air intake system 100 includes a grayscale detector 25, and the control method further includes: the air intake system 100 obtains an initial grayscale parameter value L0 and a current grayscale parameter value L1 of the filter membrane 200; if the initial grayscale parameter value L0 and the current grayscale parameter value L1 satisfy L1≤1 / 2*L0, a filter membrane 200 replacement signal of the first filter assembly 20 is generated. Specifically, the brightness of the blank filter membrane 200 is relatively large, and the test value is relatively large when the grayscale detector 25 detects it. After the filter membrane 200 has been used for a period of time, impurities are attached to the filter membrane 200, causing the color of the filter membrane 200 to darken, and the value detected by the grayscale detector 25 will become smaller. When the value L1 detected by the grayscale detector 25 is less than or equal to half of the blank filter grayscale value L0, the filter membrane 200 automatic replacement device is controlled to perform membrane replacement.

[0075] Since different filter membranes 200 have different grayscale values ​​in a blank state, the accuracy of judging the use state of the filter membrane 200 can be improved by obtaining the difference between the current grayscale and the initial grayscale of the filter membrane 200 for judgment.

[0076] Furthermore, when the air intake system 100 is provided with both a pressure detector and a grayscale detector 25, when one of them satisfies the replacement condition of the filter membrane 200, the automatic replacement device of the filter membrane 200 can be controlled to perform the membrane replacement.

[0077] In some embodiments of the present invention, the method further includes: obtaining a start signal of the air intake system 100 of the detection device; and controlling the automatic replacement device of the filter membrane 200 to replace the filter membrane 200 according to the start signal to ensure the filtering effect.

[0078] The following describes an air intake system 100 of a detection device and a control method thereof according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0079] The ambient air quality monitoring network system is the defense line of my country's ambient air and the thermometer for measuring the vital signs of my country's ecological environment. There are nearly 30,000 ambient air quality monitoring systems in China, and the daily maintenance work is professional and complex; it requires a lot of manpower costs to maintain this system.

[0080] Specifically, maintenance work includes equipment calibration, sampling probe cleaning, diaphragm replacement and other operations. The current status is that equipment calibration can be performed remotely through the network, and the probe cleaning cycle can be extended; diaphragm replacement requires weekly operation and maintenance personnel to go to the site to perform operations. Each person maintains one site every day and three sites every week. The sites are widely distributed across the country, and this part consumes a lot of manpower and material resources.

[0081] The particulate filter membrane of the air station sampling system generally uses a breathable film made of PEFT material with a pore size of 47um. The SO2, NOx, CO, and O3 analyzers use a filter membrane to filter particles in the air at the inlet, which is in direct contact with the outside air. Therefore, after a period of use, the particles deposited on the filter membrane 200 will increase the pressure of the system and affect the flow pressure value of the system. At this time, a new filter membrane 200 must be replaced. The specific operation process is carried out according to the following steps. Unscrew the fixed cover of the air filter; remove the air filter membrane holder (the plastic connector and the intake pipe are still fixed on it); replace the clean filter membrane. The filter membrane is in sheet form and one piece is used each time. In accordance with the national requirements for operation and maintenance, the air filter of each device needs to be replaced once a week.

[0082] In order to extend the replacement cycle of the analyzer filter membrane from weekly replacement to once a year or even longer, a filter membrane 200 automatic replacement device is added between the sampling main pipe and the analyzer as a primary filter. After the ambient air is sucked into the sampling tube by the sampling fan, it passes through the filter membrane 200 automatic replacement device to filter out dust and then enters each gas analyzer for detection.

[0083] According to the air intake system 100 of the embodiment of the present invention, the incoming gas is divided into two paths. During normal sampling, it passes through the three-way solenoid valve and then the roll filter paper to reach the outlet; when the particulate matter on the filter paper is too enriched, the pressure detector detects that the pressure difference between the two ends of the filter paper reaches the set threshold or the grayscale detector 25 detects that the color of the filter paper becomes darker than the set threshold, and the filter paper replacement operation is performed. At this time, the three-way solenoid valve is switched to the fixed filter. At this time, the gas is replaced through the filter membrane of the fixed filter, and the roll filter membrane moves the used filter membrane to the left and moves the blank filter membrane to the sampling port; after replacing the blank filter membrane, the three-way solenoid valve is switched back to the air path where the roll filter membrane is located, which takes 30 seconds. In this way, the filtering effect is ensured, and the cycle of the operation and maintenance personnel going to the site to replace the membrane can be extended to ensure a one-year replacement cycle.

[0084] The specific operation process is as follows:

[0085] 1. Turn on the equipment, and the three-way solenoid valve switches to allow gas to flow out of the fixed filter channel. When changing the paper tape for the first time, record the pressure difference P of the blank paper tape. IV , grayscale detection value L0, switch the three-way solenoid valve to the main channel or the first airway 110 (the membrane replacement process takes 30s).

[0086] 2. Continue to pump air.

[0087] 3. The pressure difference sensor (ALL Sensors 5PSI-D1 4V-MINI) detects that the pressure difference between the two ends of the paper tape exceeds P CV≥1.5Kpa, or when the grayscale detector 25 (composed of a white light diode and a photoresistor) detects that the brightness is L1≤1 / 2*L0, the second paper tape replacement is performed.

[0088] 4. Switch the three-way solenoid valve to allow the gas to flow out of the fixed filter channel. Replace the paper tape for the second time and record the pressure difference P of the blank paper tape. IV , grayscale detection value L0, and switch the three-way solenoid valve to the main channel through the first airway 110 (the membrane replacement process takes 30s).

[0089] Optionally, the automatic membrane replacement device of the filter membrane 200 of the first filter assembly 20 can be a roll filter paper, or a filter membrane 200 automatic replacement module, the filter membrane 200 automatic replacement module includes a plate body, and a plurality of filter modules are arranged on the plate body, the plurality of filter modules are connected in parallel, and the plurality of filter modules include a plurality of filter membranes 200 connected in series. Thus, the filter membrane 200 automatic replacement module can be connected to a plurality of detection devices, and each filter module corresponds to a detection device, thereby facilitating the improvement of detection efficiency.

[0090] For example, the automatic replacement module of the filter membrane 200 may include 16 filter membranes, which are divided into four groups of filter modules and connected to four gas analyzers, that is, each analyzer corresponds to 4 filter membranes. The device is linked with the quality control instrument and automatically replaces the filter membrane once a week. At the same time, each analyzer has its own filter to form a secondary filtration. In this way, the filtering effect is ensured, and the cycle of the operation and maintenance personnel going to the site to replace the membrane can be extended, ensuring unattended operation for one month.

[0091] In the description of the present invention, it is necessary to understand that the terms "length", "up", "down", "front", "back", "left", "right", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0093] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0096] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An air intake system (100) of a detection device, characterized in that: include: A pipeline assembly, the pipeline assembly having a first air channel (110) and a second air channel (120) connected in parallel to each other, the pipeline assembly being configured to control air flow to selectively pass through the first air channel (110) and / or the second air channel (120); A first filter assembly (20), the first filter assembly (20) being arranged in the first air passage (110), the first filter assembly (20) comprising an automatic replacement device for a filter membrane (200); A second filter component (40), wherein the second filter component (40) is disposed in the second air passage (120).

2. The air intake system (100) of the detection device according to claim 1, characterized in that: The pipeline assembly comprises a reversing device (13), the reversing device (13) having an inlet (103), a first outlet (101) and a second outlet (102), the reversing device (13) being configured to control the inlet (103) to selectively connect the first outlet (101) and / or the second outlet (102), the first outlet (101) being connected to the inlet of the first filter assembly (20), and the second outlet (102) being connected to the inlet of the second filter assembly (40).

3. The air intake system (100) of the detection device according to claim 1, characterized in that: The automatic filter membrane replacement device comprises a mounting seat (21) and a membrane replacement mechanism (22), wherein the mounting seat (21) has an air flow channel (210) extending along a first direction, and the membrane replacement mechanism (22) is configured to drive the filter membrane (200) to move along a second direction so as to control different positions of the filter membrane (200) to separate the air flow channel (210), and the first direction is perpendicular to the second direction.

4. The air intake system (100) of the detection device according to claim 3, characterized in that: The membrane changing mechanism (22) comprises a first rotating wheel (221) and a second rotating wheel (222), wherein the first rotating wheel (221) and the second rotating wheel (222) are arranged on opposite sides of the mounting seat (21) along a second direction, and the axes of the first rotating wheel (221) and the second rotating wheel (222) extend along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

5. The air intake system (100) of the detection device according to claim 4, characterized in that: The film changing mechanism (22) comprises a storage wheel (223), a collection wheel (224) and a tension wheel, wherein the storage wheel (223) is sleeved on the first rotating wheel (221), the collection wheel (224) is sleeved on the second rotating wheel (222), and the tension wheel is arranged between the storage wheel (223) and the mounting seat (21) and / or between the collection wheel (224) and the mounting seat (21); and / or The first rotating wheel (221) and / or the second rotating wheel (222) are connected to a first motor (228) along the third direction.

6. The air intake system (100) of the detection device according to claim 5, characterized in that: The tensioning wheel comprises a first roller (225), a second roller (226) and a third roller (227); the first roller (225) and the second roller (226) are arranged on opposite sides of the mounting seat (21) along the second direction; the first roller (225) and the storage wheel (223) are arranged at intervals along the first direction; the second roller (226) and the third roller (227) and the collecting wheel (224) are arranged at intervals along the first direction.

7. The air intake system (100) of the detection device according to claim 3, characterized in that: The mounting seat (21) comprises a first part (211) and a second part (212), wherein the first part (211) and the second part (212) can detachably clamp the filter membrane (200); the first part (211) has a first cavity (201), and the second part (212) has a second cavity (202), and the first cavity (201) and the second cavity (202) are connected to form the airflow channel (210).

8. The air intake system (100) of the detection device according to claim 7, characterized in that: The automatic filter membrane replacement device further comprises a first pressure detector (23) and a second pressure detector (24), wherein the first pressure detector (23) is connected to the first chamber (201), and the second pressure detector (24) is connected to the second chamber (202); and / or The automatic filter membrane replacement device further comprises a grayscale detector (25) for detecting the color of the filter membrane (200); the grayscale detector (25) is disposed on the first portion (211) and is connected to the first cavity (201); the grayscale detector (25) is opposite to the filter membrane (200) along the first direction.

9. The air intake system (100) of the detection device according to claim 7, characterized in that: The second part (212) comprises a first half (2121), a second half (2122) and an elastic member (2123), the first half (2121) and the second half (2122) are connected along the first direction, and the elastic member (2123) is supported between the first half (2121) and the second half (2122); and / or The mounting base (21) comprises a second motor (214), and the first part (211) and / or the second part (212) are connected to the second motor (214); and / or The second part (212) is provided with a support net (215) for preventing the filtering membrane (200) and a sealing member (216), wherein the sealing member (216) forms a sealing structure between the outer periphery of the support net (215) and the inner wall of the second part (212).

10. The air intake system (100) of the detection device according to claim 1, characterized in that: The second filter component (40) is configured as a fixed filter component; and / or The air intake system (100) further comprises a first check valve (31), wherein the first check valve (31) is arranged in the first air passage (110) and is located downstream of the first filter assembly (20); and / or the air intake system (100) further comprises a second check valve (32), wherein the second check valve (32) is arranged in the second air passage (120) and is located downstream of the second filter assembly (40).

11. A detection device, characterized in that: It comprises an air intake system (100) according to any one of claims 1-10.

12. A control method for an air intake system (100) of a detection device, used for an air intake system (100) according to any one of claims 1 to 10, characterized in that: The method comprises: Obtaining a filter membrane (200) replacement signal of the first filter assembly (20); According to the filter membrane (200) replacement signal, the pipeline component is controlled to disconnect the first airway (110) and connect the second airway (120), and the filter membrane (200) automatic replacement device is controlled to replace the filter membrane (200); After determining that the filter membrane (200) automatic replacement device has completed the replacement of the filter membrane (200), the pipeline component is controlled to connect the first airway (110) and disconnect the second airway (120).

13. The control method of the air intake system (100) of the detection device according to claim 12, characterized in that: The air intake system (100) comprises a pressure detector, and the control method further comprises: the air intake system (100) acquires an initial pressure parameter value and a current pressure parameter value of the filter membrane (200); If the difference between the initial pressure parameter value and the current pressure parameter value is greater than or equal to a preset value, a signal for replacing the filter membrane (200) of the first filter assembly (20) is generated; and / or The air intake system (100) comprises a grayscale detector (25), and the control method further comprises: the air intake system (100) acquires an initial grayscale parameter value L0 and a current grayscale parameter value L1 of the filter membrane (200); If the initial grayscale parameter value L0 and the current grayscale parameter value L1 satisfy L1≤1 / 2*L0, a signal for replacing the filter membrane (200) of the first filter component (20) is generated.

14. The control method of the air intake system (100) of the detection device according to claim 12, characterized in that: The method further comprises: Obtaining a start signal of an air intake system (100) of a detection device; The filter membrane (200) is replaced by controlling the automatic filter membrane replacement device according to the start signal.

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