Probe rod type multifunctional sampling device and method for inner surface of air pipe of central air conditioner

Abstract

The invention discloses a feeler lever type multifunctional sampling device for the inner surface of an air pipe of a central air conditioner and a use method of the feeler lever type multifunctional sampling device. The feeler lever type multifunctional sampling device comprises an extension rod assembly, a collection execution assembly, a microorganism sampler and a dust accumulation amount sampler, the device can simultaneously support microorganism sampling and dust accumulation quantity sampling, highly meets the detection requirements of sanitary specifications, solves the problem that only single dust accumulation quantity sampling can be carried out in the prior art, and realizes multiple purposes; through the orthogonal wiping actuator, the clamping control assembly and the driving system, automatic clamping, unfolding, wiping and folding operations of the sampler are realized. The rubbing track, force and speed are uniformly controlled by a mechanical system, so that the inconsistency of manual operation is avoided, and the repeatability and accuracy of sampling are remarkably improved; besides, the sampler is in a folded state in the process of stretching into the air pipe, and is only unfolded at a sampling point through mechanical driving, so that the attachment of pollution sources on the way is effectively avoided, the risk of cross contamination is reduced, and the purity and the analysis accuracy of the sample are ensured.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning duct surface sampling technology, and more specifically, relates to a probe-type multifunctional sampling device and method for the inner surface of centralized air conditioning ducts. Background Technology

[0002] In China, centralized air conditioning systems must undergo annual hygiene testing, conducted in accordance with the "Hygienic Standard for Centralized Air Conditioning and Ventilation Systems in Public Places" (WS 10013-2023). This standard stipulates that centralized air conditioning systems must monitor the supply air (total bacterial count, total fungal count, β-hemolytic streptococci, and inhalable particulate matter (PM10)). Currently, sampling of the inner surfaces of air ducts in centralized air conditioning ventilation systems largely relies on manual operation, which has significant drawbacks, such as: ① Poor safety: Testing personnel must enter the narrow, dark interior of the ducts, posing a personal safety risk. ② Low efficiency: Manual wiping sampling is time-consuming and laborious, and it is difficult to reach deep within large ducts, resulting in insufficient representativeness of sampling points. ③ Poor repeatability and accuracy: The force, speed, and trajectory of manual wiping cannot be standardized, leading to large fluctuations in sampling results and poor comparability. ④ Susceptibility to cross-contamination: Changing sampling tools and operating procedures may introduce human error.

[0003] To address the aforementioned technical issues, Chinese invention patent CN113588331B discloses a centralized air conditioning duct inner surface sampling system, comprising a handheld module and a telescopic rod mounted thereon. The front end of the telescopic rod is extended to a position close to the duct opening, and a posture adjustment module is fixedly installed at the end of the telescopic rod. The first and second adjustment wheels in the handheld module control the drive block servo motor and angle adjustment servo motor in the posture adjustment module, respectively, to adjust the extension length of the adjustment rod and its angle with the horizontal plane. The posture adjustment module is also equipped with a light to illuminate the duct opening area. A sampling module is attached to the end of the adjustment rod. This module uses an upper dust collection box and a lower dust collection box. The lower dust collection box can simultaneously collect dust twice. Finally, the lower dust collection box can be disassembled and weighed, ensuring a sealing effect and preventing incomplete dust collection that could affect the final sampling data. This solves the problems of sampling personnel needing to climb ladders to sample dust from centralized air conditioning duct openings and the potential for sampling errors.

[0004] The aforementioned patented technology overcomes the limitations of traditional sampling methods to some extent, but it still has the following technical problems or areas for improvement. For example, this technical solution can only sample dust accumulation, but centralized air conditioning hygiene testing requires sampling and testing of microorganisms, thus it is not highly compatible with standard testing requirements; during the process of extending the device into the centralized air conditioning duct, the sampling head surface is not protected, leading to the adhesion of contaminants during the process, affecting the accuracy of subsequent analysis. Therefore, it is urgent to propose a probe-type multifunctional sampling device for the inner surface of centralized air conditioning ducts to address the shortcomings of existing technologies. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a probe-type multifunctional sampling device for the inner surface of centralized air conditioning ducts and its usage method. It simultaneously supports microbial sampling and dust accumulation sampling, highly adapting to hygiene standards and testing requirements. This solves the problem of existing technologies only being able to perform single dust accumulation sampling, achieving "one machine for multiple uses." Through an orthogonal wiping actuator, gripping control components, and a drive system, the sampler's automatic gripping, unfolding, wiping, and retraction operations are achieved. The wiping trajectory, force, and speed are uniformly controlled by the mechanical system, avoiding inconsistencies from manual operation and significantly improving sampling repeatability and accuracy. Furthermore, the sampler is in a retracted state during insertion into the duct, unfolding only mechanically at the sampling point, effectively avoiding the adhesion of contaminants along the way, reducing the risk of cross-contamination, and ensuring sample purity and analytical accuracy.

[0006] To achieve the above objectives, according to a first aspect of the present invention, a probe-type multifunctional sampling device for the inner surface of a centralized air conditioning duct includes: The extended rod assembly, the acquisition and execution assembly disposed at the front end of the extended rod assembly, and the microbial sampler and dust accumulation sampler installed in the acquisition and execution assembly; The extension rod assembly includes a grip, an extension control rod whose angle is adjustable and fixed to the front end of the grip, and a connecting rod rotatably connected to the front end of the extension control rod via a rotation driver. The acquisition and execution component includes a main housing rotatably connected to the front end of the connecting rod via a rotary driver, an orthogonal rubbing actuator disposed within the main housing, and a first sampler mounting component and a second sampler mounting component installed within the acquisition and execution component; the first sampler mounting component and the second sampler mounting component are respectively used to mount a microbial sampler and a dust accumulation sampler; The first sampler mounting assembly and the second sampler mounting assembly have the same structure, both including: a carrier loading slot opened in the main housing, a carrier block installed in the carrier loading slot, a magnetic suction part provided on the back of the carrier block, a sampler mounting hole opened in the carrier block, a clamping part provided on the side wall of the sampler mounting hole, and a push-pull block fixed to the side wall of the carrier block.

[0007] Preferably, the orthogonal rubbing actuator includes: The orthogonal lead screw module is fixed inside the main housing, a rubbing drive motor drives the orthogonal lead screw module to move, a lead screw nut block serving as the motion output end of the orthogonal lead screw module, and a clamping control component fixed below the lead screw nut block.

[0008] Preferably, the gripping control component includes: A linear motor is fixed below the lead screw and nut block; a push rod is fixed to the output shaft of the linear motor; grippers are rotatably connected to both sides of the linear motor; a pull block is located at the end of the push rod; an interconnecting transmission rod is sleeved on the push rod; a tension spring is located between the pull block and the interconnecting transmission rod; an intermediate connecting rod is located between the two ends of the interconnecting transmission rod and the grippers; and a friction plate is located at the end of the grippers. A push cylinder is provided between the linear motor and the lead screw and nut block.

[0009] Preferably, the microbial sampler includes: Sampling bottle and sampling rod assembly; the sampling rod assembly includes: a first cap portion fitted onto the mouth of the sampling bottle, a central support rod positioned downwards at the center of the first cap portion, a sampling plate rotatably disposed at the lower end of the central support rod, a sampling cotton pad fixed to the surface of the sampling plate, and a retraction drive assembly for driving the sampling plate to rotate and position along the end of the central support rod.

[0010] Preferably, the retraction / extension drive component includes: The first sliding hole is formed on the surface of the first cover body, the first transmission pressure plate is slidably disposed in the first sliding hole, the slide is formed in the central support rod, the first slide rod is fixed below the center of the first transmission pressure plate and slidably embedded in the slide, the intermediate push rod is disposed between the end of the first slide rod and one side of the sampling plate, and the first return spring is disposed between the first transmission pressure plate and the bottom surface of the first sliding hole.

[0011] Preferably, the microbial sampler includes a sealing ring fixedly disposed on the side wall of the sampling bottle opening.

[0012] Preferably, the dust accumulation sampler includes: a second cover portion, a second sliding hole opened in the second cover portion, an extension hole opened in the side wall of the second sliding hole, a second transmission pressure plate slidably connected in the second sliding hole, an opening and closing claw rotatably connected to the side wall of the extension hole, a second return spring disposed between the second transmission pressure plate and the bottom surface of the second sliding hole, a second sliding rod fixed below the center of the second transmission pressure plate, and a non-woven fabric disposed at the lower end of the opening and closing claw.

[0013] According to a second aspect of the present invention, a method for using a probe-type multifunctional sampling device for the inner surface of a centralized air conditioning duct includes the following steps: S100: First, the operator pre-installs the microbial sampler and the dust accumulation sampler into the carrier block, and then installs the carrier block into the first sampler mounting assembly and the second sampler mounting assembly; S200: Hold the handle and adjust the rotation driver and extension control lever to place the data acquisition and execution component at the air conditioning sampling point; S300: Start the system. The orthogonal rubbing actuator drives the clamping control component below to clamp and pull out the first and second covers of the microbial sampler and the dust sampler in sequence and control their unfolding. The orthogonal screw module drives the sampler to perform rubbing collection.

[0014] Preferably, step S300 further includes the following steps: S311: Under the action of the orthogonal screw module, the gripping control component is driven to move to directly above the first sampler mounting component, and then the push cylinder is extended and the linear motor is pulled back at the same time, so that the gripper opens. S312: When the lower end of the gripper is at the same height as the first cap, the linear motor is extended, and the interconnecting transmission rod moves downward under the downward pull of the tension spring, causing the gripper to clamp the side wall of the first cap; then the push cylinder is lifted to pull the entire sampling rod assembly out of the sampling bottle; S313: Control the linear motor to continue extending, so that the front end of the push rod presses against the first transmission pressure plate in the first sliding hole, and then under the linkage of the first sliding rod and the middle push rod, the sampling plate is flattened, and then the wiping sampling action can be performed. S314: After sampling is completed, the linear motor is first controlled to slowly pull back. Under the return of the first reset spring, the first transmission pressure plate moves upward, thereby driving the sampling plate to close. Then, through the cooperation of the orthogonal screw module, the push cylinder, and the linear motor, the sampling rod assembly is reinstalled into the sampling bottle.

[0015] Preferably, step S300 further includes the following steps: S321: Under the action of the orthogonal screw module, the gripping control component is driven to move to the top of the second sampler mounting component, and then the push cylinder is extended and the linear motor is pulled back at the same time, so that the gripper opens. S322: When the lower end of the gripper is at the same height as the second cover, the linear motor is extended, and the interconnected transmission rod moves downward under the downward pull of the tension spring, causing the gripper to clamp the side wall of the second cover; then the push cylinder is lifted to pull out the dust accumulation sampler as a whole. S323: Control the linear motor to continue extending, so that the front end of the push rod presses against the second transmission pressure plate in the second sliding hole. Then, under the pressure of the second transmission pressure plate and the upper end of the opening and closing claw, the opening and closing claw is unfolded, and the non-woven fabric is flattened for rubbing sampling. S324: After sampling is completed, the linear motor is first slowly pulled back. Under the return of the second reset spring, the second transmission pressure plate moves upward, which in turn drives the opening and closing claws to close. Then, through the cooperation of the orthogonal screw module, the push cylinder, and the linear motor, the dust accumulation sampler is reinstalled into the second sampler mounting assembly.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: 1. This invention provides a probe-type multi-functional sampling device for the inner surface of a centralized air conditioning duct. It simultaneously supports microbial sampling and dust accumulation sampling, highly adaptable to hygiene standards, and solves the problem of existing technologies only being able to perform single dust accumulation sampling, achieving "one machine for multiple uses." Through an orthogonal wiping actuator, gripping control components, and a drive system, the sampler's automatic gripping, unfolding, wiping, and retraction operations are achieved. The wiping trajectory, force, and speed are uniformly controlled by the mechanical system, avoiding inconsistencies from manual operation and significantly improving sampling repeatability and accuracy. Furthermore, the sampler is in a retracted state during insertion into the duct, unfolding only at the sampling point through mechanical drive, effectively avoiding the adhesion of contaminants along the way, reducing the risk of cross-contamination, and ensuring sample purity and analytical accuracy. The microbial sampler is equipped with a sealing ring and sampling bottle, while the dust accumulation sampler uses non-woven fabric and a sealed design to ensure sample integrity during transportation and storage, preventing volatilization or contamination. Overall, this invention, through mechanized and automated design, achieves safe, efficient, accurate, and multifunctional sampling of the inner surface of centralized air conditioning ducts, effectively overcoming the shortcomings of traditional manual sampling and improving the reliability and standardization of hygiene testing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 2 This is a first cross-sectional view of the data acquisition and execution component of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 3 This is a partial enlarged view A of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the overall structure of a microbial sampler for a multifunctional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of a microbial sampler for a multifunctional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the sampling bottle structure of a multifunctional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the sampling rod assembly in the retracted state of a multi-functional sampling device for the inner surface of a central air conditioning duct according to an embodiment of the present invention. Figure 8This is a schematic diagram of the sampling rod assembly structure of a multi-functional sampling device for the inner surface of a central air conditioning duct in an embodiment of the present invention, in a flat state. Figure 9 This is a second cross-sectional view of the data acquisition and execution component of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 10 This is a partial enlarged view (B) of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the dust accumulation sampler folding structure of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the flat structure of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct, according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the orthogonal rubbing actuator structure of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 14 This is a first operating trajectory diagram of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 15 This is a second operating trajectory diagram of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention; Figure 16 This is a third operational trajectory diagram of a multi-functional sampling device for the inner surface of a probe-type centralized air conditioning duct according to an embodiment of the present invention. In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-acquisition execution component, 100-main housing, 110-orthogonal rubbing actuator, 111-rubbing drive motor, 112-orthogonal lead screw module, 113-lead screw nut block, 114-gripping control component, 1141-linear motor, 1142-push rod, 1143-interconnected transmission rod, 1144-tension spring, 1145-intermediate connecting rod, 1146-gripper, 1147-friction plate, 120-first sampler mounting component, 121-carrier loading slot, 122-carrier block, 123-magnetic suction part, 124-push-pull block, 125-clamping part, 130-second sampler mounting component, 2-extend rod assembly, 201-grip, 202- 203-Connecting rod, 204-Rotation driver, 3-Microbial sampler, 301-Sampling bottle, 302-Sampling rod assembly, 3020-First cover, 3021-Extension and retraction drive assembly, 30211-First sliding hole, 30212-First transmission pressure plate, 30213-First return spring, 30214-Slide rail, 30215-First slide rod, 30216-Intermediate push rod, 3022-Central support rod, 3023-Sampling plate, 3024-Sampling cotton pad, 303-Sealing ring, 4-Dust accumulation sampler, 400-Second cover, 401-Second sliding hole, 402-Opening and closing claw, 403-Second transmission pressure plate, 404-Second slide rod, 405-Second return spring, 406-Non-woven fabric. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figures 1-16 As shown in this embodiment of the invention, the multifunctional sampling device for the inner surface of a probe-type centralized air conditioning duct includes: Extending rod assembly 2, acquisition execution assembly 1 disposed at the front end of the extending rod assembly 2, microbial sampler 3 and dust accumulation sampler 4 installed in the acquisition execution assembly 1; The extension rod assembly 2 includes a grip 201, an extension control rod 202 whose angle is adjustable and fixed to the front end of the grip 201, and a connecting rod 203 rotatably connected to the front end of the extension control rod 202 via a rotation driver. The acquisition execution component 1 includes a main housing 100 rotatably connected to the front end of the connecting rod 203 via a rotary driver, an orthogonal rubbing actuator 110 disposed within the main housing 100, and a first sampler mounting component 120 and a second sampler mounting component 130 installed within the acquisition execution component 1; the first sampler mounting component 120 and the second sampler mounting component 130 are respectively used to mount the microbial sampler 3 and the dust accumulation sampler 4. The first sampler mounting assembly 120 and the second sampler mounting assembly 130 have the same structure, both including: a carrier loading groove 121 opened in the main housing 100, a carrier block 122 installed in the carrier loading groove 121, a magnetic suction part 123 provided on the back of the carrier block 122, a sampler mounting hole opened in the carrier block 122, a clamping part 125 provided on the side wall of the sampler mounting hole, and a push-pull block 124 fixed to the side wall of the carrier block 122.

[0023] like Figure 2 As shown, in this embodiment of the invention, the orthogonal friction actuator 110 includes: The orthogonal lead screw module 112 is fixed inside the main housing 100, the rubbing drive motor 111 drives the orthogonal lead screw module 112 to move, the lead screw nut block 113 serves as the movement output end of the orthogonal lead screw module 112, and the clamping control assembly 114 is fixed below the lead screw nut block 113.

[0024] like Figure 13 As shown, in this embodiment of the invention, the clamping control component 114 includes: A linear motor 1141 is fixed below the lead screw nut block 113; a push rod 1142 is fixed to the output shaft of the linear motor 1141; grippers 1146 are rotatably connected to both sides of the linear motor 1141; a pull block is provided at the end of the push rod 1142; an interconnecting transmission rod 1143 is sleeved on the push rod 1142; a tension spring 1144 is provided between the pull block and the interconnecting transmission rod 1143; an intermediate connecting rod 1145 is provided between the two ends of the interconnecting transmission rod 1143 and the grippers 1146; and a friction plate 1147 is provided at the end of the grippers 1146. A push cylinder is provided between the linear motor 1141 and the lead screw nut block 113.

[0025] like Figures 4-8 As shown, in this embodiment of the invention, the microbial sampler 3 includes: The sampling bottle 301 and the sampling rod assembly 302 are included. The sampling rod assembly 302 includes: a first cap portion 3020 that is fitted into the opening of the sampling bottle 301; a central support rod 3022 that is disposed downward at the center of the first cap portion 3020; a sampling plate 3023 that is rotatably disposed at the lower end of the central support rod 3022; a sampling cotton pad 3024 that is fixed to the surface of the sampling plate 3023; and a retraction drive assembly 3021 that drives the sampling plate 3023 to rotate and position along the end of the central support rod 3022.

[0026] like Figure 8 As shown in this embodiment of the invention, the retraction / extension driving component 3021 includes: The first sliding hole 30211 is formed on the surface of the first cover portion 3020; the first transmission pressure plate 30212 is slidably disposed in the first sliding hole 30211; the slide rail 30214 is formed in the central support rod 3022; the first slide rod 30215 is fixed below the center of the first transmission pressure plate 30212 and slidably embedded in the slide rail; the intermediate push rod 30216 is disposed between the end of the first slide rod 30215 and one side of the sampling plate 3023; and the first return spring 30213 is disposed between the first transmission pressure plate 30212 and the bottom surface of the first sliding hole 30211.

[0027] like Figure 4As shown, in this embodiment of the invention, the microbial sampler 3 includes a sealing ring 303 fixedly disposed on the side wall of the sampling bottle 301.

[0028] like Figure 11 As shown, in this embodiment of the invention, the dust accumulation sampler 4 includes: a second cover portion 400, a second sliding hole 401 opened in the second cover portion 400, an extension hole opened in the side wall of the second sliding hole 401, a second transmission pressure plate 403 slidably connected in the second sliding hole 401, an opening and closing claw 402 rotatably connected to the side wall of the extension hole, a second return spring 405 disposed between the second transmission pressure plate 403 and the bottom surface of the second sliding hole 401, a second sliding rod 404 fixed below the center of the second transmission pressure plate 403, and a non-woven fabric 406 disposed at the lower end of the opening and closing claw.

[0029] In this embodiment of the invention, the method of using the probe-type multifunctional sampling device for the inner surface of a centralized air conditioning duct includes the following steps: S100: First, the operator pre-installs the microbial sampler 3 and the dust accumulation sampler 4 into the carrier block, and then installs the carrier block into the first sampler mounting assembly 120 and the second sampler mounting assembly 130. S200: Hold the handle 201 and, by adjusting the rotation driver and extension control lever, place the data acquisition and execution component 1 at the air conditioning sampling point; S300: Start the system. The orthogonal rubbing actuator drives the clamping control component 114 below to clamp and pull out the first cover 3020 and the second cover 400 of the microbial sampler 3 and the dust accumulation sampler 4, and control the unfolding. The orthogonal screw module 112 drives the sampler to perform rubbing collection.

[0030] The S300 further includes the following steps: S311: Under the action of the orthogonal lead screw module 112, the gripping control component 114 is driven to move to directly above the first sampler mounting component 120, and then the push cylinder is controlled to extend, while the linear motor 1141 is controlled to pull back, so that the gripper opens. S312: When the lower end of the gripper is at the same height as the first cover 3020, the linear motor 1141 is extended, and the interconnecting transmission rod 1143 moves downward under the downward pull of the tension spring 1144, driving the gripper 1146 to clamp the side wall of the first cover 3020; then the push cylinder is lifted to pull the entire sampling rod assembly 302 out of the sampling bottle 301. S313: Control the linear motor 1141 to continue extending, so that the front end of the push rod 1142 presses against the first transmission pressure plate 30212 in the first sliding hole 30211, and then under the linkage of the first sliding rod 30215 and the middle push rod 30216, the sampling plate is flattened, and then the wiping sampling action can be performed. S314: After sampling is completed, the linear motor 1141 is first controlled to slowly pull back. Under the rebound of the first reset spring 30213, the first transmission pressure plate 30212 moves upward, thereby driving the sampling plate to close. Then, through the cooperation of the orthogonal screw module, the push cylinder, and the linear motor 1141, the sampling rod group is reinstalled into the sampling bottle 301.

[0031] S321: Under the action of the orthogonal lead screw module 112, the gripping control component 114 is driven to move to the top of the second sampler mounting component 130, and then the push cylinder is extended and the linear motor 1141 is pulled back at the same time, so that the gripper opens. S322: When the lower end of the gripper is at the same height as the second cover 400, the linear motor 1141 is extended, and the interconnecting transmission rod 1143 moves downward under the pull of the tension spring (1144), which drives the gripper 1146 to clamp the side wall of the second cover 400; then the push cylinder is lifted to pull out the dust accumulation sampler 4 as a whole. S323: Control the linear motor 1141 to continue extending, so that the front end of the push rod 1142 presses against the second transmission pressure plate 403 in the second sliding hole 401, and then under the action of the second transmission pressure plate 403 and the upper end of the opening and closing claw, the opening and closing claw is unfolded, and the non-woven fabric is flattened for rubbing sampling. S324: After sampling is completed, the linear motor 1141 is first slowly pulled back. Under the rebound of the second reset spring 405, the second transmission pressure plate 403 moves upward, thereby driving the opening and closing claw to close. Then, through the cooperation of the orthogonal screw module, the push cylinder, and the linear motor 1141, the dust accumulation sampler 4 is reinstalled into the second sampler mounting assembly 130.

[0032] In this embodiment of the invention, both microbial sampling and dust accumulation sampling are supported simultaneously, highly adaptable to the testing requirements of hygiene standards, and solving the problem that existing technologies can only perform single dust accumulation sampling, thus achieving "one machine for multiple uses." Through an orthogonal wiping actuator, gripping control components, and a drive system, the sampler's automatic gripping, unfolding, wiping, and retraction operations are realized. The wiping trajectory, force, and speed are uniformly controlled by the mechanical system, avoiding inconsistencies from manual operation and significantly improving the repeatability and accuracy of sampling. Furthermore, the sampler is in a retracted state during insertion into the duct, unfolding only at the sampling point through mechanical drive, effectively avoiding the adhesion of contaminants along the way, reducing the risk of cross-contamination, and ensuring the purity and accuracy of the sample analysis. The microbial sampler is equipped with a sealing ring and sampling bottle, while the dust accumulation sampler uses non-woven fabric and a sealed design to ensure the integrity of the sample during transportation and storage, preventing volatilization or contamination. Overall, this invention, through mechanized and automated design, achieves safe, efficient, accurate, and multifunctional sampling of the inner surface of centralized air conditioning ducts, effectively overcoming the shortcomings of traditional manual sampling and improving the reliability and standardization of hygiene testing.

[0033] In this embodiment of the invention, the upper, lower, left, and right directions of the inner surface of the central air conditioning duct can be sampled by adjusting the extension rod assembly.

[0034] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A multi-functional sampling device for the inner surface of a centralized air conditioning duct, characterized in that, include: The extension rod assembly (2), the acquisition execution assembly (1) disposed at the front end of the extension rod assembly (2), the microbial sampler (3) and the dust accumulation sampler (4) installed in the acquisition execution assembly (1); The extension rod assembly (2) includes a grip (201), an extension control rod (202) whose angle is adjustable and fixed to the front end of the grip (201), and a connecting rod (203) rotatably connected to the front end of the extension control rod (202) via a rotation driver. The acquisition execution component (1) includes a main housing (100) rotatably connected to the front end of the connecting rod (203) via a rotary driver, an orthogonal friction actuator (110) disposed in the main housing (100), and a first sampler mounting component (120) and a second sampler mounting component (130) installed in the acquisition execution component (1); the first sampler mounting component (120) and the second sampler mounting component (130) are respectively used to mount the microbial sampler (3) and the dust accumulation sampler (4); The first sampler mounting assembly (120) and the second sampler mounting assembly (130) have the same structure, both including: a carrier loading groove (121) opened in the main housing (100), a carrier block (122) installed in the carrier loading groove (121), a magnetic suction part (123) provided on the back of the carrier block (122), a sampler mounting hole opened in the carrier block (122), a clamping part (125) provided on the side wall of the sampler mounting hole, and a push-pull block (124) fixed to the side wall of the carrier block (122).

2. The multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 1, characterized in that, The orthogonal rubbing actuator (110) includes: An orthogonal lead screw module (112) fixed in the main housing (100), a rubbing drive motor (111) that drives the orthogonal lead screw module (112) to move, a lead screw nut block (113) that serves as the output end of the orthogonal lead screw module (112) to move, and a clamping control assembly (114) fixed below the lead screw nut block (113).

3. The multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 2, characterized in that, The gripping control component (114) includes: A linear motor (1141) is fixed below the lead screw nut block (113), a push rod (1142) is fixed to the output shaft of the linear motor (1141), a gripper (1146) is rotatably connected to both sides of the linear motor (1141), a pull block is provided at the end of the push rod (1142), an interconnecting transmission rod (1143) is sleeved on the push rod (1142), a tension spring (1144) is provided between the pull block and the interconnecting transmission rod (1143), an intermediate connecting rod (1145) is provided between the two ends of the interconnecting transmission rod (1143) and the gripper (1146), and a friction plate (1147) is provided at the end of the gripper (1146); a push cylinder is provided between the linear motor (1141) and the lead screw nut block (113).

4. The multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 1, characterized in that, The microbial sampler (3) includes: Sampling bottle (301), sampling rod assembly (302); the sampling rod assembly (302) includes: a first cap part (3020) clamped to the mouth of the sampling bottle (301), a central support rod (3022) disposed downward at the center of the first cap part (3020), a sampling plate (3023) rotatably disposed at the lower end of the central support rod (3022), a sampling cotton pad (3024) fixed to the surface of the sampling plate (3023), and a retraction drive assembly (3021) that drives the sampling plate (3023) to rotate and position along the end of the central support rod (3022).

5. A multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 4, characterized in that, The retraction / extension drive component (3021) includes: The first sliding hole (30211) is opened on the surface of the first cover part (3020), the first transmission pressure plate (30212) is slidably disposed in the first sliding hole (30211), the slide rail (30214) is opened in the central support rod (3022), the first slide rod (30215) is fixed below the center of the first transmission pressure plate (30212) and slidably embedded in the slide rail, the intermediate push rod (30216) is disposed between the end of the first slide rod (30215) and one side of the sampling plate (3023), and the first return spring (30213) is disposed between the first transmission pressure plate (30212) and the bottom surface of the first sliding hole (30211).

6. A multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 5, characterized in that, The microbial sampler (3) includes a sealing ring (303) fixedly disposed on the side wall of the sampling bottle (301).

7. A multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 1, characterized in that, The dust accumulation sampler (4) includes: a second cover (400), a second sliding hole (401) opened in the second cover (400), an extension hole opened on the side wall of the second sliding hole (401), a second transmission pressure plate (403) slidably connected in the second sliding hole (401), a rotatably connected opening and closing claw (402) to the side wall of the extension hole, a second return spring (405) disposed between the second transmission pressure plate (403) and the bottom surface of the second sliding hole (401), a second sliding rod (404) fixed below the center of the second transmission pressure plate (403), and a non-woven fabric (406) disposed at the lower end of the opening and closing claw.

8. A method of using a probe-type multifunctional sampling device for the inner surface of a centralized air conditioning duct, applicable to any one of claims 1 to 7, comprising the following steps: S100: First, the operator pre-installs the microbial sampler (3) and the dust accumulation sampler (4) in the carrier block, and installs the carrier block into the first sampler mounting assembly (120) and the second sampler mounting assembly (130); S200: Hold the handle (201) and place the acquisition execution component (1) at the air conditioning sampling point by adjusting the rotation drive and extension control lever; S300: Start the system. The orthogonal rubbing actuator drives the clamping control component (114) below to clamp and pull out the first cover (3020) and the second cover (400) of the microbial sampler (3) and the dust accumulation sampler (4) and control the unfolding. The orthogonal screw module (112) drives the sampler to perform rubbing collection.

9. A multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 8, characterized in that, The S300 further includes the following steps: S311: Under the action of the orthogonal screw module (112), the clamping control component (114) is driven to move to the top of the first sampler mounting component (120), and then the push cylinder is extended and the linear motor (1141) is pulled back at the same time, so that the gripper opens. S312: When the lower end of the gripper is at the same height as the first cover part (3020), the linear motor (1141) is extended, so that the interconnecting transmission rod (1143) moves downward under the downward pull of the tension spring (1141), driving the gripper (1146) to clamp the side wall of the first cover part (3020); then the push cylinder is lifted to pull the sampling rod assembly (302) out of the sampling bottle (301) as a whole; S313: Control the linear motor (1141) to continue extending, so that the front end of the push rod (1142) presses against the first transmission pressure plate (30212) in the first sliding hole (30211), and then under the linkage of the first sliding rod (30215) and the middle push rod (30216), the sampling plate is flattened, and then the wiping sampling action can be performed. S314: After sampling is completed, the linear motor (1141) is first controlled to slowly pull back. Under the rebound of the first reset spring (30213), the first transmission pressure plate (30212) moves upward, thereby driving the sampling plate to close. Then, through the cooperation of the orthogonal screw module, the push cylinder, and the linear motor (1141), the sampling rod group is reinstalled into the sampling bottle (301).

10. A multi-functional sampling device for the inner surface of a centralized air conditioning duct as described in claim 8, characterized in that, The S300 further includes the following steps: S321: Under the action of the orthogonal screw module (112), the gripping control component (114) is driven to move to the top of the second sampler mounting component (130), and then the push cylinder is extended and the linear motor (1141) is pulled back at the same time, so that the gripper opens. S322: When the lower end of the gripper is at the same height as the second cover (400), the linear motor (1141) is extended, and the interconnecting transmission rod (1143) moves downward under the downward pull of the tension spring (1141), driving the gripper (1146) to clamp the side wall of the second cover (400); then the push cylinder is lifted to pull out the dust accumulation sampler (4) as a whole. S323: Control the linear motor (1141) to continue extending, so that the front end of the push rod (1142) presses against the second transmission pressure plate (403) in the second sliding hole (401), and then under the action of the second transmission pressure plate (403) and the upper end of the opening and closing claw, the opening and closing claw is unfolded, and then the non-woven fabric is flattened for rubbing sampling; S324: After sampling is completed, the linear motor (1141) is first controlled to slowly pull back. Under the rebound of the second reset spring (405), the second transmission pressure plate (403) moves upward, thereby driving the opening and closing claw to close. Then, through the cooperation of the orthogonal screw module, the push cylinder, and the linear motor (1141), the dust accumulation sampler (4) is reinstalled into the second sampler mounting assembly (130).

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