Small-sized universal array chamber structure for split type electronic nose

Abstract

The invention discloses a small general array chamber structure for a split electronic nose, which comprises a detection box, an air inlet shunting assembly and an exhaust assembly, and is characterized in that a central container and a plurality of side mounting grooves distributed around a central mounting groove along the circumferential direction are arranged in the detection box. By adopting the small-sized universal array chamber structure for the split type electronic nose, the quick-change gas sensor redundancy detection modules in the side mounting grooves can be conveniently and quickly changed, so that the quick-change gas sensor redundancy detection modules can be quickly changed through the type combination of the universal gas sensor detection module and each quick-change gas sensor redundancy detection module; the method is suitable for detection of different detected targets, and the universality is excellent; meanwhile, the effect of multiple tests can be achieved through one test, the test error is greatly reduced, and the test efficiency is improved; moreover, the chambers are mutually independent and do not interfere with one another, so that the detection precision is further improved; and moreover, the whole structure is extremely compact, the application requirements of miniaturization and modularization are met, the integration level is high, and the portability is good.

Description

Technical Field

[0001] This invention relates to the technical field of devices for testing or analyzing materials by measuring their chemical or physical properties, and more specifically to a small universal array chamber structure for a split-type electronic nose. Background Technology

[0002] An electronic nose, also known as an odor scanner, is a rapidly developing gas detection-based rapid detection instrument. It uses specific sensors and pattern recognition systems to quickly provide overall information about the sample, indicating its implicit characteristics. The core component of an electronic nose is the gas sensor. Gas sensors can be classified into many types based on their operating principles, including metal oxide type, electrochemical type, conductive polymer type, mass type, and photoionization type.

[0003] Due to the varying detection targets or purposes, electronic noses require specific combinations of gas sensors for detection. Therefore, please refer to Chinese patent applications with publication numbers CN119936122A and CN119959474A, etc. Existing electronic noses are dedicated devices, capable of detecting only one type of target or a broad category of targets, and classifying them into smaller subcategories based on the collected information. This results in very poor versatility. Different electronic noses need to be prepared specifically for different detection targets or purposes, incurring huge costs and limiting the application and promotion of electronic noses. Furthermore, existing miniaturized and compact electronic noses lack redundant detection capabilities (redundant arrangement). To meet processing algorithm requirements and ensure detection accuracy, multiple repeated measurements are required, leading to low detection efficiency and poor operational convenience.

[0004] Solving these problems is now a top priority. Summary of the Invention

[0005] To address the technical problem that existing electronic noses are all dedicated testing devices with poor versatility, this invention provides a small universal array chamber structure for split-type electronic noses.

[0006] The technical solution is as follows:

[0007] The first aspect of this application relates to a small universal array chamber structure for a split-type electronic nose, including a detection box. An air intake splitter assembly and an exhaust assembly are respectively installed at both ends of the detection box. The detection box is provided with a central container and a plurality of side mounting slots distributed circumferentially around the central mounting slot. A universal gas sensor detection module is installed in the central container. The universal gas sensor detection module and the central container together form a universal sensor detection chamber that connects the air intake splitter assembly and the exhaust assembly. Each of the side mounting slots is equipped with a quick-change redundant gas sensor detection module. Each quick-change redundant gas sensor detection module and its corresponding side mounting slot together form a quick-change sensor detection chamber that connects the air intake splitter assembly and the exhaust assembly. A quick-change sealing plate that can be detachably covered at the opening of the corresponding side mounting slot is installed on the outer wall of the detection box.

[0008] The above-described small universal array chamber structure for a split-type electronic nose utilizes a universal sensor detection chamber with a built-in universal gas sensor detection module and multiple quick-change sensor detection chambers with built-in redundant quick-change gas sensor detection modules. The universal gas sensor detection module, which is versatile and requires minimal replacement, is installed in the central container. The redundant quick-change gas sensor detection modules, which need to be adaptively adjusted for different detection targets, are installed in the quick-change sensor detection chambers surrounding the universal sensor detection chamber. Furthermore, the easily removable quick-change sealing plates allow for convenient quick-change of the redundant quick-change gas sensor detection modules in the side mounting slots. This simple and convenient operation, combined with the universal gas sensor detection module and the various redundant quick-change gas sensor detection modules, forms a modular sensor array capable of accurately analyzing different target gases. This adaptable array is suitable for detecting various targets, offering excellent versatility and making this electronic nose a complete system. This universal device, applicable to various inspected targets, significantly reduces the investment cost of electronic noses, facilitating their application, promotion, and widespread adoption. Simultaneously, it allows for identical type and parameter settings for redundant detection modules of quick-change gas sensors in two or more quick-change sensor detection chambers. This means a single test can achieve the equivalent of multiple redundant tests, satisfying the data acquisition requirements of the processing algorithm, obtaining high-precision detection results, and significantly improving testing efficiency and operational convenience. Furthermore, the universal gas sensor detection module and each redundant quick-change gas sensor detection module are located in their own independent chambers, eliminating interference and further enhancing detection accuracy. Moreover, the gas to be tested is guided to each detection chamber of the detection box by the inlet diversion assembly, and then discharged by the exhaust assembly after detection. The overall structure is extremely compact, meeting the requirements of miniaturization and modularization, with high integration and excellent portability. Attached Figure Description

[0009] Figure 1This is a schematic diagram of a small universal array chamber structure;

[0010] Figure 2 This is a cross-sectional view of the small universal array chamber structure when using the quick-change gas sensor redundant detection module in Implementation 1.

[0011] Figure 3 This is a schematic diagram of the small universal array chamber structure after removing the quick-change sealing plate when using the quick-change gas sensor redundant detection module in Implementation 1.

[0012] Figure 4 for Figure 3 A schematic diagram of the structure after removing the quick-change gas sensor circuit board;

[0013] Figure 5 for Figure 4 A schematic diagram of the structure after removing the rubber gasket pressure plate and sealing gasket;

[0014] Figure 6 This is a cross-sectional view of the small universal array chamber structure when using the redundancy detection module of the fast-changing gas sensor in Implementation 2.

[0015] Figure 7 This is a schematic diagram of the small universal array chamber structure after removing the quick-change sealing plate when using the quick-change gas sensor redundant detection module in Implementation 2.

[0016] Figure 8 This is a schematic diagram of the volume adjustment component.

[0017] Figure 9 This is a schematic diagram of the structure of the central container. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0019] like Figures 1-9 As shown, a small universal array chamber structure for a split-type electronic nose mainly includes a detection box 1 and an air intake splitting assembly 2 and an exhaust assembly 3 respectively installed at the front and rear ends of the detection box 1.

[0020] The testing box 1 includes a central container 1a and multiple side mounting slots 1b, which are circumferentially distributed around the central mounting slot 1a. In this embodiment, each side mounting slot 1b is recessed into the circumferential side wall of the testing box 1 surrounding the central mounting slot 1a. Simultaneously, quick-change sealing plates 8 are installed on the outer wall of the testing box 1, each capable of being detachably covered at the opening of its corresponding side mounting slot 1b. Therefore, opening the quick-change sealing plate 8 exposes the corresponding side mounting slot 1b. Taking the overall structure of the testing box 1 as a cuboid as an example, the intake splitter assembly 2 and the exhaust assembly 3 are respectively located at both ends of the testing box 1. The remaining four circumferential side walls of the testing box 1 are all recessed to form side mounting slots 1b, which are covered by quick-change sealing plates 8. Thus, the testing box 1 contains one central container 1a and four side mounting slots 1b. By installing and removing the quick-change sealing plates 8, the equipment and components in the side mounting slots 1b can be easily operated, replaced, and maintained.

[0021] In this embodiment, a universal gas sensor detection module 4 is installed in the central container 1a. The universal gas sensor detection module 4 and the central container 1a together form a universal sensor detection chamber 1a1 that connects the intake diversion assembly 2 and the exhaust assembly 3. Quick-change gas sensor redundant detection modules 5 are installed in the side mounting slots 1b. Each quick-change gas sensor redundant detection module 5 and the corresponding side mounting slot 1b together form a quick-change sensor detection chamber 1b1 that connects the intake diversion assembly 2 and the exhaust assembly 3.

[0022] Therefore, in this embodiment, the universal gas sensor detection module 4, which is versatile and does not require frequent replacement, is installed in the central container 1a (replacing it is relatively troublesome). The quick-change gas sensor redundant detection module 5, which requires adaptive adjustment for different detection targets, is installed in the quick-change sensor detection chamber 1b1 located around the universal sensor detection chamber 1a1. By setting up a quick-change sealing plate 8 that is easy to install and remove, the quick-change gas sensor redundant detection module 5 in the side mounting slot 1b can be quickly replaced. The operation is simple and convenient. Thus, by combining the universal gas sensor detection module 4 with the various quick-change gas sensor redundant detection modules 5, a modular sensor array capable of accurately analyzing different target gases is formed, which is suitable for the detection of different targets and has excellent versatility. This makes the electronic nose a universal device applicable to different targets, which greatly reduces the investment cost of the electronic nose and is conducive to the application, promotion and popularization of the electronic nose. Meanwhile, the type and parameters of the redundant detection modules 4 of the quick-change gas sensors in two or more quick-change sensor detection chambers 1b1 can be set to be exactly the same, so that a single test can detect space 9b1, which is equivalent to the effect of multiple redundant tests. This not only meets the data acquisition requirements of the processing algorithm and obtains high-precision detection results, but also greatly improves the testing efficiency and the convenience of the detection operation.

[0023] Furthermore, the general-purpose gas sensor detection module 4 and each quick-change gas sensor redundant detection module 5 are located in their own independent chambers to detect the gas without any interference between them, thereby further improving the detection accuracy. Moreover, the gas to be tested is guided by the inlet diversion component 2 to each detection chamber of the detection box 1, and after the detection is completed, the gas is discharged by the exhaust component 3. The overall structure is extremely compact, meeting the application requirements of miniaturization and modularization, with high integration and good portability.

[0024] Different quick-change gas sensor redundant detection modules 5 have different requirements for detection space; a reasonable detection space volume can effectively improve detection accuracy. Therefore, please refer to... Figure 2 and Figure 6 Each quick-change sensor detection chamber 1b1 is equipped with a volume adjustment component 6 for adjusting the volume of the quick-change sensor detection chamber 1b1. By setting the volume adjustment component 6, the volume of the quick-change sensor detection chamber 1b1 can be adaptively adjusted according to the different targets being detected and the needs of the current quick-change gas sensor redundant detection module 5, thereby not only improving the detection accuracy, but also further enhancing the versatility of the small universal array chamber structure (electronic nose).

[0025] In this embodiment, each quick-change sensor detection chamber 1b1 has a volume adjustment section with the same width at each position. The volume adjustment component 6 is installed in the volume adjustment section so that the volume adjustment component 6 can maintain good airtightness when adjusting the volume of the quick-change sensor detection chamber 1b1.

[0026] Specifically, each volume adjustment assembly 6 includes a slider mounting plate 6a installed at one end of the corresponding volume adjustment section along its length, and a volume adjustment slider 6b slidably mounted on the slider mounting plate 6a along the length of the volume adjustment section. The mounting end face and the outer edges on both sides in the width direction of the slider mounting plate 6a are fixedly connected to the cavity wall of the corresponding volume adjustment section without gaps. That is, the slider mounting plate 6a is fixedly installed at one end of the volume adjustment section along its length, and extends along the length of the volume adjustment section. Furthermore, there are no gaps between the mounting end (inner end) and the outer edges on both sides in the width direction of the slider mounting plate 6a and the cavity wall of the corresponding volume adjustment section. The volume adjustment slider 6b is slidably mounted on the outer end of the slider mounting plate 6a along its length direction, and its bottom surface and the outer edges on both sides in the width direction are slidably fitted to the cavity wall of the corresponding volume adjustment section without gaps.

[0027] Therefore, when it is necessary to reduce the volume of the quick-change sensor detection chamber 1b1, the volume adjustment slider 6b slides away from the slider mounting plate 6a (slides outward); when it is necessary to increase the volume of the quick-change sensor detection chamber 1b1, the volume adjustment slider 6b slides towards the slider mounting plate 6a (slides inward). This design not only allows for flexible adjustment of the volume of the quick-change sensor detection chamber 1b1 by sliding the volume adjustment slider 6b, but also ensures good airtightness.

[0028] Furthermore, the bottom surface of the volume adjustment slider 6b and the outer edges of both sides in the width direction are equipped with a sealing layer that is interference-fitted with the cavity wall of the corresponding volume adjustment section. This not only ensures good airtightness, but also makes it difficult for the volume adjustment slider 6b to slide under gas pressure (the volume adjustment slider 6b will only slide when a large force is applied by a person). This allows the volume of the sensor detection chamber 1b1 to remain stable after it has been filled, further improving the recognition accuracy.

[0029] Further, please see Figure 2 , Figure 5 and Figure 8 The volume adjustment section has recessed guide grooves 1b3 extending along its length on both sides of the groove wall in the width direction. The outer edges of both sides of the volume adjustment slider 6b in the width direction have sliding guide ribs 6b2 that are adapted to the corresponding guide grooves 1b3. Each sliding guide rib 6b2 is slidably embedded in its corresponding guide groove 1b3, effectively improving the stability and reliability of the volume adjustment slider 6b's forward and backward sliding. The outer wall of the sliding guide rib 6b2 also has a sealing layer that is interference-fitted with the corresponding guide groove 1b3, with the effect described above.

[0030] Furthermore, one or both sides of the guide slide 1b3 are provided with adjustment scales distributed along its length (not shown in the figure), so that the operator can accurately know the adjusted volume of the quick-change sensor detection chamber 1b1 according to the adjustment scale position of the volume adjustment slider 6b, which not only improves the convenience of operation, but also enhances the accuracy of volume adjustment.

[0031] Furthermore, a support boss 6b1 is formed on the bottom of the volume adjustment slider 6b away from the slider mounting plate 6a. The outer circumferential edge of the support boss 6b1 has a sealing layer that is interference-fitted with the cavity wall of the corresponding volume adjustment section. This not only ensures good airtightness, but also makes it difficult for the volume adjustment slider 6b to slide under gas pressure. This allows the volume of the sensor detection chamber 1b1 to remain stable after it has been filled. At the same time, it reduces the contact area between the volume adjustment slider 6b and the cavity wall of the volume adjustment section, thus avoiding jamming.

[0032] A detection groove is formed in the middle of the bottom of the side mounting groove 1b. At least two circuit board mounting seats 1b2 are provided at the bottom of the side mounting groove 1b surrounding the detection groove. The quick-change gas sensor redundant detection module 5 has the following two implementation methods:

[0033] Quick-change gas sensor redundant detection module 5 Implementation method 1: Please refer to Figures 2-5 The quick-change gas sensor redundant detection module 5 includes a quick-change gas sensor circuit board 5a, a sealing gasket 5b, and a gasket pressure plate 5c. The quick-change gas sensor circuit board 5a is detachably mounted on all circuit board mounting bases 1b2 (typically using screws or clips). The sealing gasket 5b covers the opening of the detection groove, and the gasket pressure plate 5c presses the sealing gasket 5b firmly against the bottom of the detection groove. The sealing gasket 5b and the detection groove together form a quick-change sensor detection chamber 1b1. At least one dedicated gas sensor 5a1 is integrated on the side of the quick-change gas sensor circuit board 5a closest to the detection groove. The dedicated gas sensor 5a1 is a conventional gas sensor, such as a metal oxide gas sensor.

[0034] The sealing gasket 5b has sealing through holes 5b1 that are adapted to each dedicated gas sensor 5a1. The gasket pressure plate 5c is located on the side of the sealing gasket 5b away from the bottom of the side mounting groove 1b. The gasket pressure plate 5c is detachably connected to the bottom of the side mounting groove 1b (usually by screws or clips). The gasket pressure plate 5c has clearance through holes 5c1 that are adapted to each dedicated gas sensor 5a1. The diameter of each sealing through hole 5b1 is smaller than the diameter of the corresponding clearance through hole 5c1. Each dedicated gas sensor 5a1 passes through the corresponding clearance through hole 5c1 and sealing through hole 5b1 in sequence and then extends into the quick-change sensor detection chamber 1b1. Each dedicated gas sensor 5a1 is interference-fitted with the hole wall of the corresponding sealing through hole 5b1.

[0035] Therefore, by designing that the diameter of the sealing through-hole 5b1 is smaller than the diameter of the corresponding clearance through-hole 5c1 and that each dedicated gas sensor 5a1 is press-fitted with the wall of the corresponding sealing through-hole 5b1, the detection part of the dedicated gas sensor 5a1 can be inserted into the quick-change sensor detection chamber 1b1 while ensuring the airtightness of the quick-change sensor detection chamber 1b1.

[0036] Quick-change gas sensor redundant detection module 5, implementation method 2: Please refer to Figure 6 and Figure 7The quick-change gas sensor redundant detection module 5 includes a gas detection thin-film sensor 5d and a thin-film sensor pressure plate 5e. The gas detection thin-film sensor 5d is a thin-film gas sensor, which is a gas detection instrument based on metal oxide semiconductor material and belongs to the category of semiconductor gas sensors. The gas detection thin-film sensor 5d covers the opening of the detection groove. The thin-film sensor pressure plate 5e is used to press the gas detection thin-film sensor 5d tightly against the bottom of the detection groove. The gas detection thin-film sensor 5d and the detection groove together form a quick-change sensor detection chamber 1b1. The thin-film sensor pressure plate 5e is located on the side of the gas detection thin-film sensor 5d away from the bottom of the side mounting groove 1b and is detachably connected to the bottom of the side mounting groove 1b (usually by screws or clips). The quick-change gas sensor redundant detection module 5 with this implementation can ensure that the quick-change sensor detection chamber 1b1 has excellent airtightness.

[0037] Please see Figure 2 , Figure 6 and Figure 7 The central container 1a has a sensor mounting port on the side near the exhaust assembly 3. The universal gas sensor detection module 4 includes a universal gas sensor circuit board 4a that covers the sensor mounting port. The universal gas sensor circuit board 4a and the central container 1a together form a universal sensor detection chamber 1a1. At least one universal gas sensor 4b extending into the universal sensor detection chamber 1a1 is integrated on the side of the universal gas sensor circuit board 4a near the central container 1a. This not only ensures the reliable installation of the universal gas sensor detection module 4, but also allows the universal gas sensor detection module 4 to be replaced. However, the replacement steps are more complicated than those of the quick-change gas sensor redundant detection module 5.

[0038] Furthermore, the universal sensor detection chamber 1a1 is divided into a diffusion space 1a11 and a detection space 1a12 by a centrally located air distribution plate 1a2. The air distribution plate 1a2 has an array of small holes 1a21. The diffusion space 1a11 includes an expansion section 1a111 that gradually increases in size from the air inlet of the universal sensor detection chamber 1a1 and a stable section 1a112 that extends from the end of the expansion section 1a111 away from the air inlet to the air distribution plate 1a2. The expansion section 1a111 has a conical structure, and the stable section 1a112 has a cylindrical structure. The universal gas sensor 4b is located in the detection space 1a12, and the detection space 1a12 is connected to the air outlet of the universal sensor detection chamber 1a1. With this structure, the gas being tested, after entering the detection chamber 1a1 of the universal sensor, can first diffuse rapidly in the expansion section 1a111 of the conical structure, then achieve a relatively stable state in the stable section 1a112 of the cylindrical structure, and then enter the detection space 1a12 through the array of small holes 1a21 on the air distribution plate 1a2. This results in extremely high uniformity of the gas being tested filling the detection space 1a12, which can effectively improve the detection accuracy of the universal gas sensor 4b.

[0039] Please see Figures 1-7 The air intake splitter assembly 2 includes a front housing 2a connected to the detection housing 1, an air intake connector 2b installed on the side of the front housing 2a away from the detection housing 1, and a gas distributor 2c installed on the side of the front housing 2a close to the detection housing 1. The front housing 2a has an air intake channel 2a1 connecting the air intake connector 2b and the gas distributor 2c. The gas distributor 2c integrates exhaust ports 2c1 corresponding to the universal sensor detection chamber 1a1 and the quick-change sensor detection chamber 1b1, respectively. Each exhaust port 2c1 is connected to the air intake port of the corresponding universal sensor detection chamber 1a1 or the air intake port of the quick-change sensor detection chamber 1b1 through a pipeline. Therefore, the gas to be tested enters from the air intake connector 2b and is then guided into the universal sensor detection chamber 1a1 and each quick-change sensor detection chamber 1b1 by the gas distributor 2c and the corresponding pipeline, which is simple and reliable.

[0040] The exhaust assembly 3 includes a rear housing 3a connected to the detection box 1 and several exhaust connectors 3b installed on the side of the rear housing 3a away from the detection box 1. Each exhaust connector 3b is connected to the corresponding universal sensor detection chamber 1a1 or quick-change sensor detection chamber 1b1 through an exhaust channel 3c provided in the rear housing 3a. Therefore, the gas to be detected in the universal sensor detection chamber 1a1 and each quick-change sensor detection chamber 1b1 is guided to the exhaust connector 3b by the corresponding exhaust channel 3c and then discharged by the exhaust connector 3b, which is simple and reliable.

[0041] Meanwhile, a detection control circuit board 7 is installed in the rear housing 3a. This detection control circuit board 7 is electrically connected to the general gas sensor detection module 4 and each quick-change gas sensor redundant detection module 5. The detection control circuit board 7 can control the general gas sensor detection module 4 and each quick-change gas sensor redundant detection module 5 to detect the gas being tested, process the detection information of the general gas sensor detection module 4 and each quick-change gas sensor redundant detection module 5, and transmit the processed information to the outside.

[0042] In this embodiment, the test box 1, the intake split assembly 2, and the exhaust assembly 3 all adopt a split structure to facilitate the maintenance and replacement of internal equipment and electrical components. Specifically, the test box 1, the intake split assembly 2, and the exhaust assembly 3 are all plate structures connected by dedicated connectors.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A small universal array chamber structure for a split-type electronic nose, comprising a detection chamber, characterized in that: The detection box has an intake splitter assembly and an exhaust assembly installed at both ends. The detection box contains a central container and multiple side mounting slots distributed circumferentially around the central mounting slot. A universal gas sensor detection module is installed in the central container. The universal gas sensor detection module and the central container together form a universal sensor detection chamber that connects the intake splitter assembly and the exhaust assembly. Each of the side mounting slots has a quick-change redundant gas sensor detection module installed. Each quick-change redundant gas sensor detection module and its corresponding side mounting slot together form a quick-change sensor detection chamber that connects the intake splitter assembly and the exhaust assembly. The outer wall of the detection box is equipped with quick-change sealing plates that can be detachably covered at the opening of the corresponding side mounting slot.

2. The small universal array chamber structure according to claim 1, characterized in that: Each of the quick-change sensor detection chambers is equipped with a volume adjustment component for adjusting the volume of the quick-change sensor detection chamber.

3. The small universal array chamber structure according to claim 2, characterized in that: Each of the quick-change sensor detection chambers has a volume adjustment section of the same width at each position. Each volume adjustment component includes a slider mounting plate installed at one end of the corresponding volume adjustment section along its length and a volume adjustment slider that can be slidably mounted on the slider mounting plate along the length of the volume adjustment section. The mounting end face and the outer edges on both sides in the width direction of the slider mounting plate are fixedly connected to the cavity wall of the corresponding volume adjustment section without gaps. The bottom surface and the outer edges on both sides in the width direction of the volume adjustment slider are slidably fitted to the cavity wall of the corresponding volume adjustment section without gaps.

4. The small universal array chamber structure according to claim 3, characterized in that: The bottom surface of the volume adjustment slider and the outer edges of both sides in the width direction are provided with a sealing layer that is interference-fitted with the cavity wall of the corresponding volume adjustment section.

5. The small universal array chamber structure according to claim 1, characterized in that: A detection groove is formed by a recess in the middle of the bottom of the side mounting slot. The bottom of the side mounting slot has at least two circuit board mounting seats surrounding the detection groove. The quick-change gas sensor redundant detection module includes a quick-change gas sensor circuit board detachably mounted on all circuit board mounting seats, a sealing gasket covering the opening of the detection groove, and a gasket pressure plate for pressing the sealing gasket firmly against the bottom of the detection groove. The sealing gasket and the detection groove together form the quick-change sensor detection chamber. At least one [missing information - likely a device or component] is integrated on the side of the quick-change gas sensor circuit board closest to the detection groove. Each gas sensor has a sealing gasket with a sealing through-hole adapted to each gas sensor. The gasket pressure plate is located on the side of the sealing gasket away from the bottom of the side mounting groove and is detachably connected to the bottom of the side mounting groove. The gasket pressure plate has a clearance through-hole adapted to each gas sensor. The diameter of each sealing through-hole is smaller than the diameter of the corresponding clearance through-hole. Each gas sensor passes through the corresponding clearance through-hole and sealing through-hole in sequence and extends into the quick-change sensor detection chamber. Each gas sensor is interference-fitted with the wall of the corresponding sealing through-hole.

6. The small universal array chamber structure according to claim 1, characterized in that: A detection groove is formed in the middle of the bottom of the side mounting slot. The quick-change gas sensor redundant detection module includes a gas detection thin film sensor covering the opening of the detection groove and a thin film sensor pressure plate for pressing the gas detection thin film sensor against the bottom of the detection groove. The gas detection thin film sensor and the detection groove together form the quick-change sensor detection chamber. The thin film sensor pressure plate is located on the side of the volume detection thin film sensor away from the bottom of the side mounting slot and is detachably connected to the bottom of the side mounting slot.

7. The small universal array chamber structure according to claim 1, characterized in that: The central container has a sensor mounting port on the side near the exhaust assembly. The universal gas sensor detection module includes a universal gas sensor circuit board that covers the sensor mounting port. The universal gas sensor circuit board and the central container together form the universal sensor detection chamber. At least one universal gas sensor extending into the universal sensor detection chamber is integrated on the side of the universal gas sensor circuit board near the central container.

8. The small universal array chamber structure according to claim 7, characterized in that: The universal sensor detection chamber is divided into a diffusion space and a detection space by a centrally located air distribution plate. The air distribution plate has an array of small holes. The diffusion space includes an expansion section that gradually increases in size from the air inlet of the universal sensor detection chamber and a stable section that extends from the end of the expansion section away from the air inlet to the air distribution plate. The expansion section has a conical structure, and the stable section has a cylindrical structure. The universal gas sensor is located in the detection space, and the detection space is connected to the air outlet of the universal sensor detection chamber.

9. The small universal array chamber structure according to claim 1, characterized in that: The exhaust assembly includes a rear housing connected to the detection box and several exhaust connectors installed on the side of the rear housing away from the detection box. Each exhaust connector is connected to a corresponding general-purpose sensor detection chamber or quick-change sensor detection chamber through an exhaust channel in the rear housing. A detection control circuit board is installed in the rear housing, and the detection control circuit board is electrically connected to the general-purpose gas sensor detection module and each quick-change gas sensor redundant detection module.

10. The small universal array chamber structure according to claim 1, characterized in that: The air intake splitter assembly includes a front housing connected to the detection box, an air intake connector installed on the side of the front housing away from the detection box, and a gas distributor installed on the side of the front housing close to the detection box. The front housing has an air intake channel connecting the air intake connector and the gas distributor. The gas distributor integrates exhaust ports that correspond one-to-one with the general sensor detection chamber and the quick-change sensor detection chamber, respectively. Each exhaust port is connected to the air intake port of the corresponding general sensor detection chamber or the air intake port of the quick-change sensor detection chamber through a pipeline.

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