Lung function detection system

Abstract

The embodiment of the invention relates to a lung function detection system which comprises a trolley used for bearing all functional modules of the detection system; the ventilation module comprises a valve body and a valve element, and the valve element is switched to be connected or disconnected with a valve body channel through actions so as to form different ventilation paths; the airway resistance module is configured to detect airway resistance parameters in the breathing process; the digital handle comprises a flow velocity tube provided with a total pressure channel, a static pressure channel and a sampling channel, the digital handle is configured to be selectively installed on the ventilation module or the airway resistance module, the breathing pressure is obtained through the total pressure channel and the static pressure channel in the breathing test process, and a corresponding gas sample is collected through the sampling channel; wherein the ventilation module is installed on the trolley through the first mechanical arm, the air channel resistance module is installed on the trolley through the second mechanical arm, and the digital handle is detachably connected to the trolley, the ventilation module or the air channel resistance module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, and in particular to a lung function detection system. BACKGROUND

[0002] In the field of medical detection, lung function detection is a core means for diagnosing respiratory diseases and evaluating lung function status, and is widely used in clinical diagnosis, rehabilitation monitoring, physical examination screening and other scenarios.

[0003] The existing lung function detection equipment generally has problems such as scattered function modules, fixed installation, poor adaptability, etc. On the one hand, the ventilation module and the airway resistance detection module are independent devices that need to be manually transported and spliced, which is cumbersome and can affect the detection accuracy due to connection errors. On the other hand, the equipment is fixed in position and cannot be adjusted according to the height of the subject, the difference between sitting and standing, etc., resulting in unnatural breathing posture of the subject during detection, which in turn affects the accuracy of the detection data.

[0004] However, the inventors have found that the related art at least has the following technical problems: the existing lung function detection equipment has low operation efficiency, limited detection accuracy, and narrow application scenarios in clinical applications, and cannot meet the needs of the medical industry for efficient, accurate, and multifunctional lung function detection equipment. SUMMARY

[0005] An object of the present application is to provide a lung function detection system to at least solve the above problems.

[0006] To achieve the above object, some embodiments of the present application provide a lung function detection system, comprising:

[0007] A trolley for carrying various function modules of the detection system;

[0008] A ventilation module comprising a valve body and a valve core, the valve core switches the connection and disconnection of the valve body channel through action to form different ventilation paths;

[0009] An airway resistance module configured to detect airway resistance parameters during breathing;

[0010] A digital handle comprising a flow rate tube with a total pressure channel, a static pressure channel, and a sampling channel, the digital handle being configured to be selectively installed on the ventilation module or the airway resistance module, and during the breathing test, the digital handle obtains breathing pressure through the total pressure channel and the static pressure channel, and collects corresponding gas samples through the sampling channel;

[0011] The ventilation module is installed on the trolley through a first mechanical arm, the airway resistance module is installed on the trolley through a second mechanical arm, and the digital handle is detachably connected to the trolley, the ventilation module, or the airway resistance module.

[0012] Compared with the related art, in the scheme provided by the embodiment of the application, the integration and bearing of each functional module are realized by the trolley, the spatial positions of the ventilation module and the airway resistance module are adjusted by the first mechanical arm and the second mechanical arm respectively, and the detection requirements of different subjects are adapted; the digital handle can be selectively installed on the ventilation module or the airway resistance module, and synchronous realization of the respiratory pressure collection and the gas sample collection is realized; the technical problems of the low integration, poor adaptability, single detection dimension and narrow adaptive scene of the existing lung function detection equipment are solved, and an efficient, accurate and multifunctional lung function detection system is provided. BRIEF DESCRIPTION OF DRAWINGS

[0013] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document. These example are not intended to limit the application, but rather to clarify and make specific the present application. The drawings are not necessarily drawn to scale, except as otherwise noted. The drawings are intended to be illustrative, and not limiting of the application.

[0014] Figure 1 is a structural schematic diagram of a detection system provided by the embodiment of the disclosure;

[0015] Figure 2 is a structural schematic diagram of the detection system from another perspective provided by the embodiment of the disclosure;

[0016] Figure 3 is a structural schematic diagram of the detection system from another perspective provided by the embodiment of the disclosure;

[0017] Figure 4 is a structural schematic diagram of a ventilation device provided by the embodiment of the disclosure;

[0018] Figure 5 is a structural schematic diagram of the ventilation device from another perspective provided by the embodiment of the disclosure;

[0019] Figure 6 is a structural schematic diagram of the ventilation device from another perspective provided by the embodiment of the disclosure;

[0020] Figure 7 is a partial structural schematic diagram of the ventilation device provided by the embodiment of the disclosure;

[0021] Figure 8 is a cross-sectional schematic diagram of a valve body and a piston type valve core provided by the embodiment of the disclosure;

[0022] Figure 9 is a partial schematic diagram of the ventilation device from another perspective provided by the embodiment of the disclosure;

[0023] Figure 10 is a structural schematic diagram of a piston type valve core provided by the embodiment of the disclosure;

[0024] Figure 11Figure 1 is a cross-sectional view of a piston valve according to an embodiment of the present disclosure;

[0025] Figure 12 Figure 2 is a structural view of an airway resistance device according to an embodiment of the present disclosure;

[0026] Figure 13 Figure 3 is an exploded view of the airway resistance device according to an embodiment of the present disclosure;

[0027] Figure 14 Figure 4 is another exploded view of the airway resistance device according to an embodiment of the present disclosure;

[0028] Figure 15 Figure 5 is a partial view of the airway resistance device according to an embodiment of the present disclosure;

[0029] Figure 16 Figure 6 is another partial view of the airway resistance device according to an embodiment of the present disclosure;

[0030] Figure 17 Figure 7 is a partial cross-sectional view of the airway resistance device according to an embodiment of the present disclosure;

[0031] Figure 18 Figure 8 is a structural view of a digital handle according to an embodiment of the present disclosure;

[0032] Figure 19 Figure 9 is another structural view of the digital handle according to an embodiment of the present disclosure;

[0033] Figure 20 Figure 10 is another structural view of the digital handle according to an embodiment of the present disclosure;

[0034] Figure 21 Figure 11 is a structural view of a flow rate tube according to an embodiment of the present disclosure;

[0035] Figure 22 Figure 12 is a partial view of the digital handle according to an embodiment of the present disclosure;

[0036] Figure 23 Figure 13 is a structural view of the flow rate tube according to an embodiment of the present disclosure;

[0037] Figure 24 Figure 14 is a cross-sectional view of the flow rate tube according to an embodiment of the present disclosure;

[0038] Figure 25 Figure 15 is another cross-sectional view of the flow rate tube according to an embodiment of the present disclosure;

[0039] Figure 26 Figure 16 is a structural view of a motion flow meter according to an embodiment of the present disclosure;

[0040] Figure 27is an explosion schematic view of a motion flowmeter provided by an embodiment of the present disclosure;

[0041] Figure 28 is a structural schematic view of a base of a motion flowmeter provided by an embodiment of the present disclosure;

[0042] Figure 29 is an explosion schematic view of a motion flowmeter provided by an embodiment of the present disclosure;

[0043] Figure 30 is a structural schematic view of a base provided by an embodiment of the present disclosure;

[0044] Figure 31 is Figure 30 is a cross-sectional structural schematic view of A-A in FIG. 8;

[0045] Figure 32 is Figure 30 is a cross-sectional structural schematic view of B-B in FIG. 8;

[0046] Figure 33 is Figure 30 is a cross-sectional structural schematic view of C-C in FIG. 8;

[0047] Figure 34 is a use state schematic view of a digital handle and a ventilation device of a detection system provided by an embodiment of the present disclosure;

[0048] Figure 35 is a use state schematic view of a digital handle and an airway resistance device of a detection system provided by an embodiment of the present disclosure.

[0049] Reference signs:

[0050] 10: valve body; 101: first channel; 102: second channel; 103: step structure; 104: positioning part; 20: demand valve; 30: piston valve core; 301: valve core body; 3011: sealing flange; 3012: accommodating cavity; 3013: mounting part; 3014: first threaded hole; 302: one-way valve core; 3021: guide rod; 3022: first stop part; 3023: first connecting part; 3024: intercepting plate; 3025: guide inclined surface; 3026: first hollow part; 3027: first connecting fitting part; 303: spring; 304: silica gel film layer; 305: linear bearing; 401: motor; 402: screw rod; 50: first electric control board; 60: first support frame; 601: top plate; 6011: first annular groove; 6012: first sealing ring; 6013: positioning fitting part; 602: bottom plate; 603: sealing structure; 701: limiting plate; 702: fixed block; 7021: sliding groove; 80: first shell; 801: air vent; 802: connecting port; 90: T-shaped pipe; 901: first connecting pipe; 9011: second annular groove; 902: second connecting pipe; 100: terminal resistance device; 1002: second stop part; 1003: through port; 1004: second connecting part; 1005: second threaded hole; 110: oscillator; 120: second shell; 1201: air vent; 130: end cover; 1301: avoiding port; 1302: opening; 140: second support frame; 150: control board; 160: flange plate; 170: connecting plate; 1801: through port; 190: clamping space; 200: second sealing ring; 210: pipe body; 2101: inlet section; 2102: contraction section; 2103: measurement section; 2104: diffusion section; 2105: horizontal flow section; 2106: main channel; 2107: sample collection hole; 2108: sampling channel; 2109: absolute pressure collection hole; 2110: pressure channel; 220: measurement element; 2201: total pressure tapping hole; 2202: static pressure tapping hole; 2203: total pressure channel; 22031: total pressure channel port; 2204: static pressure channel; 22041: static pressure channel port; 230: grid; 240: mounting seat; 250: handle shell; 2501: accommodating cavity; 2502: mounting support; 2601: base; 2602: bottom inner shell; 26021: first accommodating groove; 26022: second hollow part; 2603: upper cover; 26031: second accommodating groove; 2604: clamping piece; 2605: sealing gasket; 270: first pressure sensor; 280: base; 2801: total pressure transmission channel; 28011: total pressure branch channel; 2802: static pressure transmission channel; 28021: static pressure branch channel; 2803: sampling transmission channel; 2804: total pressure connecting port; 2805: static pressure connecting port; 2806: total pressure connecting channel; 2807: static pressure connecting channel; 2808: first clamping arm;2809: second clamping arm; 2810: bearing part; 2811: passage part; 290: mounting gasket; 300: cover; 310: second pressure sensor; 320: vehicle body; 3201: electrical interface; 330: traveling wheel; 340: gas analysis module; 350: first mechanical arm; 360: second mechanical arm; 370: display module; 380: controller. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0052] The terms “first”, “second”, and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion.

[0053] In the embodiments of the present disclosure, the terms “upper”, “lower”, “inner”, “middle”, “outer”, “front”, “back” and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term “upper” can also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0054] In addition, the terms “set”, “connected”, “fixed” should be broadly understood. For example, “connected” can be fixed connection, detachable connection, or integral structure; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0055] Unless otherwise specified, the term “a plurality of” means two or more.

[0056] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the preceding and following objects. For example, A / B represents: A or B.

[0057] The term "and / or" is a description of the association relationship between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, three relationships.

[0058] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0059] In combination with Figures 1 to 35 The embodiment of the present disclosure provides a lung function detection system, which comprises a trolley, a ventilation module, an airway resistance module and a digital handle.

[0060] The trolley is used to carry each functional module of the detection system; the ventilation module comprises a valve body 10 and a valve core, the valve core switches the on-off of the channel of the valve body 10 through action to form different ventilation paths; the airway resistance module is configured to detect airway resistance parameters in the breathing process to assist in judging the degree of airway patency; the digital handle comprises a flow rate tube with a total pressure channel 2203, a static pressure channel 2204 and a sampling channel 2108, and the digital handle is configured to be selectively installed on the ventilation module or the airway resistance module, to obtain the breathing pressure through the total pressure channel 2203 and the static pressure channel 2204 in the breathing test process, and to collect the corresponding gas sample through the sampling channel 2108; wherein the ventilation module is installed on the trolley through a first mechanical arm 350, the airway resistance module is installed on the trolley through a second mechanical arm 360, and the digital handle is detachably connected to the trolley, the ventilation module or the airway resistance module.

[0061] The lung function detection system provided by the embodiment of the present disclosure realizes the collaborative technical effects of functional integration, operation flexibility, detection accuracy and scene adaptation from the overall system level through the structural combination of the trolley, the ventilation module, the airway resistance module, the digital handle and the double mechanical arms.

[0062] The existing lung function detection equipment generally has the problem of independent separation of ventilation, resistance detection and other modules, which needs to be manually transported and spliced, and multiple devices need to be operated in cooperation, which not only occupies a large space and has a complicated operation process, but also is easy to cause the detection accuracy to decrease due to the connection error between the modules (such as pipeline leakage and asynchronous signal).

[0063] The embodiment integrates the core components such as the ventilation module, the airway resistance module and the digital handle in the same carrier through the structure design of the trolley unified bearing and the directional installation of the double mechanical arms. On the one hand, the trolley provides a stable installation reference and protection space for each module, avoiding the problems of component loss and environmental interference (such as dust affecting the sensor) caused by scattered placement. On the other hand, the first mechanical arm 350 and the second mechanical arm 360 respectively fix the ventilation module and the airway resistance module, ensuring the stability of the relative position between the modules, reducing the displacement of the modules caused by airflow impact and personnel touching, and reducing the influence of connection error on detection data from the root. Finally, the integration effect of "1+1>2" is realized: without manual splicing of independent devices, the preparation time before detection is shortened, the cooperation between modules is improved, the problem of asynchronous data of multiple devices is avoided, and the foundation is laid for subsequent multi-parameter joint analysis.

[0064] In addition, the existing equipment is mostly fixed structure, which cannot be flexibly adjusted according to the height of the subject (adult / child), posture (sitting / standing), and detection item (routine ventilation / resistance detection), resulting in unnatural breathing posture of the subject (such as bending over and looking up), and limited detection scene (such as only single item detection can be completed). The combination of the first mechanical arm 350, the second mechanical arm 360, the detachable digital handle and the multi-path ventilation module can adjust the module height, angle and distance according to the physiological characteristics of the subject, ensure the natural alignment of the interface and the mouth and nose, and avoid respiratory airflow disturbance. The ventilation module can adapt to different ventilation test scenes such as vital capacity and forced expiration by switching the airway on-off through the valve core without replacing the hardware. The design of the digital handle selectively installed in the ventilation / resistance module can meet the needs of ventilation parameter collection (cooperating with the ventilation module) and resistance-gas dual parameter collection (cooperating with the resistance module), realizing one machine with multiple uses. The digital handle can be detachably connected to the trolley, which can be conveniently stored when idle, reducing space occupation, and facilitating cleaning and disinfection (such as sterilization of the sampling channel), adapting to the health needs of high frequency, continuous detection of multiple patients in the clinic. The detection system provided by the embodiment can cover multiple scenes from children to adults, from outpatient screening to inpatient diagnosis, from rest to pre-exercise evaluation.

[0065] In addition, the core requirement of lung function detection is to obtain accurate and related parameters (such as pressure, resistance, and gas composition), and the existing equipment has problems such as single parameter (only flow rate), asynchronous collection (pressure and gas detection separately), and multiple error sources (pipeline leakage and unstable reference). The digital handle in the detection system provided in the embodiment integrates three channels of total pressure, static pressure, and sampling, can synchronously collect respiratory pressure (used for calculating flow rate / flow) and gas samples, avoids time difference caused by separate collection of multiple devices, and ensures the correlation of pressure-gas parameters; the airway resistance module is specially designed for resistance parameters to provide core data dimensions for detection and fill the gap of missing resistance parameters of conventional equipment; the modules are integrated on the trolley, data can be transmitted to the controller 380 through a unified path, and data basis is provided for joint analysis of multiple parameters (such as the correlation between resistance and gas concentration change), to avoid data islands.

[0066] During the respiratory test, one end of the flow rate pipe of the digital handle is connected to the ventilation module or the airway resistance module, then the subject holds the digital handle and holds the other end of the flow rate pipe close to the mouth and nose to breathe, the total pressure channel 2203 collects the total pressure of the airflow, the static pressure channel 2204 collects the static pressure of the airflow, the pressure sensor converts the pressure signal into an electrical signal and transmits it to the controller 380, and the flow rate and flow of the airflow are calculated; at the same time, the sampling channel 2108 collects the gas sample in the breathing process by negative pressure suction (the negative pressure is provided by the gas analysis module 340), and the sample is transported to the gas analysis module 340 for detection. When the digital handle is not needed, it can be hung on the storage rack on the trolley (the storage rack is integrally formed with the vehicle body 320 and located on one side of the vehicle body 320) through the hook to achieve convenient storage.

[0067] Optionally, the ventilation module includes a ventilation valve with a valve body 10 and a piston valve core 30. The valve body 10 has a T-shaped channel, the T-shaped channel of the valve body 10 is composed of a first channel 101 and a second channel 102 connected in communication, the piston valve core 30 is configured to selectively block the second channel 102 or make the second channel 102 unidirectionally conductive; a demand valve 20, one end of which is in communication with the first channel 101 of the valve body 10, and the other end is configured to communicate with an external gas source; in the case that the connection pipeline of the demand valve 20 and the external gas source is in a conductive state, the piston valve core 30 makes the second channel 102 unidirectionally conductive to realize gas exchange test; in the case that the connection pipeline of the demand valve 20 and the external gas source is in a disconnected state, the piston valve core 30 blocks the second channel 102 to realize oral pressure test; or, the piston valve core 30 moves away from the second channel 102 to realize conventional ventilation test.

[0068] The ventilation device provided by the embodiment provides a double-path basis of a first channel 101 (main flow passage) and a second channel 102 (control passage) for air flow for the T-shaped channel of the ventilation valve, and the demand valve 20 provides a precise trigger signal for the action of the piston valve core 30 through on-off control with the external gas source, and the two form a closed-loop cooperation of passage guarantee-gas source control-valve core response. When the pipeline is connected, the piston valve core 30 makes the second channel 102 unidirectionally connected, at this time, the demand valve 20 stably supplies air, the T-shaped channel guides the air flow to flow in the preset direction (the second channel 102 exhales), and the unidirectional connection function prevents reverse interference, and the three cooperates to guarantee the air flow stability and data accuracy of the gas exchange test; when the pipeline is disconnected, the piston valve core 30 can switch to block the second channel 102 or be away from the second channel 102 according to the demand, the former realizes pressure leakage-free through the sealing cooperation of the piston valve core 30 and the second channel 102, and meets the pressure maintaining demand of the oral cavity pressure test, and the latter guarantees the smoothness of the air flow of the conventional ventilation through the cooperation of the opening of the second channel 102 and the flow of the first channel 101, and finally realizes the full coverage adaptation of a single device to three core scenes. In the gas exchange test, the external gas source can be oxygen or diffused gas. The demand valve 20 can be a submersible two-stage head component.

[0069] Compared with the traditional multi-device switching or manual adjustment scheme, the embodiment takes the pipeline on-off as the only trigger condition, without additional sensing modules or complex control programs, forming a direct control cooperation of gas source state-valve core action-working condition switching. This cooperative logic simplifies the operation process on the one hand, and the user only needs to control the on-off of the external gas source pipeline to complete the function switching, without the need to repeatedly adjust the valve core position or replace the test components, greatly reducing the operation complexity; on the other hand, it reduces the potential fault points of the control link, avoids the function failure caused by the conflict of multiple trigger conditions, sensing signal error or manual operation error, and at the same time, the selective blocking / conducting action of the piston valve core 30 to the second channel 102 has a clear mechanical feedback, ensuring the stability of the structure state under each working condition.

[0070] Optionally, the first channel 101 is arranged through, and the axis of the first channel 101 is arranged perpendicularly to the axis of the second channel 102.

[0071] Optionally, the valve body 10 is configured to form a stepped structure 103 at the end of the first channel 101 away from the demand valve 20, and the stepped structure 103 is configured to be used for plug-in cooperation with an external ventilation component.

[0072] Optionally, the piston valve core 30 makes the second channel 102 unidirectionally connected in the direction from the inside of the ventilation valve to the outside, to allow the air flow to flow from the valve body 10 to the external environment through the second channel 102.

[0073] Optionally, the piston valve core 30 comprises: a valve core body 301, one end of which extends radially to form a sealing flange 3011, the valve core body 301 is internally configured with an accommodating cavity 3012 extending in the axial direction, and the accommodating cavity 3012 forms an opening 1302 on the end face of the sealing flange 3011; a one-way valve core 302, comprising a guide rod 3021 and a cutoff plate 3024 arranged at the end of the guide rod 3021, the guide rod 3021 is axially inserted into the accommodating cavity 3012 of the valve core body 301, and the cutoff plate 3024 is located outside the opening 1302 of the sealing flange 3011 and is arranged opposite to the second channel 102; a spring 303 arranged in the accommodating cavity 3012, one end of which abuts against the bottom wall of the accommodating cavity 3012, and the other end abuts against the end of the guide rod 3021 away from the cutoff plate 3024, so as to apply an elastic force to the guide rod 3021 in the direction of the second channel 102, and drive the cutoff plate 3024 to move in the direction of the second channel 102.

[0074] The spring 303 applies an elastic force to the guide rod 3021 in the direction of the second channel 102, so that the cutoff plate 3024 always maintains abutting state with the outlet of the second channel 102 when there is no gas flow pressure, and ensures the initial sealing effect of the second channel 102; when the gas flow pressure overcomes the elastic force, the cutoff plate 3024 can quickly separate from the second channel 102 to realize conduction, which not only guarantees the reliability of the one-way conduction function, but also improves the response sensitivity of the one-way valve core 302 to the change of gas flow pressure.

[0075] For example, when the piston valve core 30 makes the second channel 102 one-way conductive, the cutoff plate 3024 of the one-way valve core 302 abuts against the outlet of the second channel 102 of the valve body 10, and the one-way valve core 302 separates from the sealing flange 3011 of the valve core body 301 under the elastic force of the spring 303; at this time, the gas flow of the first channel 101 flows from the first channel 101 to the second channel 102, and exerts a pressure on the cutoff plate 3024 of the one-way valve core 302 abutting at the outlet of the second channel 102 in the direction of the outside of the breather valve, so as to separate the cutoff plate 3024 from the second channel 102, thereby making the gas flow flow out from the second channel 102 to the outside of the breather valve.

[0076] For example, when the piston valve core 30 blocks the second channel 102, the cutoff plate 3024 of the one-way valve core 302 abuts against the outlet of the second channel 102 of the valve body 10, and the valve core body 301 continues to move in the direction of the second channel 102 under the driving of the driving device, until the sealing flange 3011 of the valve core body 301 abuts against and exerts pressure on the cutoff plate 3024 of the one-way valve core 302, so as to avoid the gas flow in the second channel 102 from pushing the one-way valve core 302 to move away from the second channel 102, thereby realizing the sealing and blocking of the second channel 102.

[0077] By moving the valve core body 301 in the direction of the second channel 102 under the driving of the driving device, the sealing flange 3011 abuts against the blocking plate 3024 of the one-way valve core 302 and exerts pressure, forming a double-sealing structure 603 of the valve core body 301 and the one-way valve core 302. Compared with single blocking, the sealing effect of the second channel 102 is greatly enhanced, and the sealing failure caused by the airflow in the second channel 102 pushing the one-way valve core 302 away from the second channel 102 is completely avoided, so that no pressure leakage occurs during oral cavity pressure testing, and the testing accuracy is improved.

[0078] Optionally, in the radial direction of the valve core body 301, the cross-sectional outer contour of the blocking plate 3024 covers the cross-sectional outer contour of the sealing flange 3011, and the cross-sectional area of the blocking plate 3024 is greater than or equal to the cross-sectional area of the sealing flange 3011. In this way, when the sealing flange 3011 of the valve core body 301 exerts pressure on the blocking plate 3024, the pressure can uniformly act on the abutting surface of the blocking plate 3024 and the outlet of the second channel 102.

[0079] Optionally, the plate surface of the blocking plate 3024 away from the second channel 102 is provided with a silica gel film layer 304, which is configured to enhance the sealing effect of the blocking plate 3024 and the outlet of the second channel 102, and the outer contour of the silica gel film layer 304 covers at least the outer contour of the blocking plate 3024.

[0080] The silica gel film layer 304 has good elasticity and sealing property, can fill the small gap between the blocking plate 3024 and the outlet of the second channel 102, and ensures that the abutting area of the blocking plate 3024 and the outlet of the second channel 102 is covered by the silica gel film layer 304.

[0081] Optionally, the edge of the blocking plate 3024 facing the second channel 102 is configured with a guide inclined surface 3025, which is configured to guide and assist the alignment of the blocking plate 3024 and the outlet of the second channel 102.

[0082] Optionally, the blocking plate 3024 is configured with a plurality of first hollow parts 3026 uniformly distributed along the axis thereof, which are configured to reduce the weight of the blocking plate 3024 or assist the airflow circulation.

[0083] Optionally, the guide rod 3021 slides along the inner wall of the accommodating cavity 3012 of the valve core body 301, and the guide rod 3021 and the accommodating cavity 3012 of the valve core body 301 adopt a clearance fit to ensure the smoothness of the axial sliding of the guide rod 3021 along the accommodating cavity 3012, avoid the sliding jamming problem caused by too tight fit, and ensure that the blocking plate 3024 can timely act according to the change of airflow pressure during gas exchange testing.

[0084] Optionally, a linear bearing 305 is sleeved outside the guide rod 3021 and embedded in the accommodating cavity 3012 of the valve body 10 main body to reduce the sliding friction between the guide rod 3021 and the inner wall of the accommodating cavity 3012 and ensure the coaxial sliding of the guide rod 3021.

[0085] Optionally, the end of the guide rod 3021 away from the intercepting plate 3024 forms a first stop 3022, the outer diameter of the first stop 3022 is greater than the inner diameter of the linear bearing 305, and the first stop 3022 cooperates with the end face of the linear bearing 305 to prevent the linear bearing 305 from falling off from the end of the guide rod 3021 away from the intercepting plate 3024.

[0086] Optionally, the end face of the first stop 3022 away from the intercepting plate 3024 abuts against the end of the spring 303 to achieve the axial positioning of the spring 303 in the accommodating cavity 3012.

[0087] Optionally, the guide rod 3021 and the intercepting plate 3024 are detachably connected. For example, the intercepting plate 3024 and the guide rod 3021 form a nested fitting structure. Specifically, the end of the guide rod 3021 close to the intercepting plate 3024 forms a first connecting part 3023, and the side of the intercepting plate 3024 facing the guide rod 3021 is configured with a first connecting fitting part 3027 adapted to the first connecting part 3023, and the first connecting part 3023 and the first connecting fitting part 3027 are connected by nesting to form a nested fitting structure.

[0088] Optionally, a first driving device is in driving connection with the piston valve core 30 to drive the piston valve core 30 to move in the direction towards the second passage 102 to block the second passage 102 or to move in the direction away from the second passage 102 to unblock.

[0089] The first driving device provides power for the movement of the piston valve core 30, realizes the automatic movement of the piston valve core 30 in the direction towards / away from the second passage 102, ensures that the piston valve core 30 can accurately reach the position of blocking the second passage 102 or the position of unblocking, and avoids the problems of incomplete blocking or unblocking due to improper manual operation force / position.

[0090] Optionally, the outer side wall of the valve core body 301 of the piston valve core 30 is outwardly convex to form a mounting portion 3013, and the mounting portion 3013 is provided with a first threaded hole 3014 arranged in the axial direction of the valve core body 301; the first driving device comprises a motor 401 and a screw rod 402, the screw rod 402 is arranged in the first threaded hole 3014, and the motor 401 drives the screw rod 402 to rotate around the axis of the motor 401 and drives the piston valve core 30 to reciprocate in the axial direction of the valve core body 301 through the screw rod 402 and the threaded hole 3014 of the valve core body 301; wherein the outer side wall of the valve core body 301 is provided with a limiting structure for limiting the circumferential rotation of the valve core body 301, so that the valve core body 301 cannot reciprocate in the axial direction when the valve core body 301 rotates with the screw rod 402.

[0091] Optionally, the first electric control board 50 is electrically connected with the motor 401 of the driving device to control the start, stop, rotation speed and rotation direction of the motor 401, and further control the motion state of the piston valve core 30, which is especially suitable for scenarios requiring remote control or program control (such as automatically switching the test / ventilation function through a preset program); and ensures that the piston valve core 30 can adjust the action parameters according to different test / ventilation requirements (such as rapid plugging for oral cavity pressure test and slow un-plugging for regular ventilation). The first electric control board 50 is electrically connected with the controller 380 of the detection system.

[0092] Optionally, the first support frame 60 is detachably connected with the ventilation valve; wherein the valve body 10 is arranged on the top plate 601 of the first support frame 60, the top plate 601 is provided with a first through hole 1801 coaxial and communicating with the second channel 102; the piston valve core 30 is located in the first support frame 60, and when the piston valve core 30 moves towards the second channel 102, the edge of the piston valve core 30 is sealingly abutted against the inner side wall of the first through hole 1801 of the top plate 601 to plug the second channel 102.

[0093] Optionally, the top plate 601 is provided with a first annular groove 6011 circumferentially surrounding the first through hole 1801 at the inner wall of the first through hole 1801, and the first annular groove 6011 is embedded with a first sealing ring 6012; when the piston valve core 30 plugs the second channel 102, the edge of the piston valve core 30 abuts against the first sealing ring 6012 to enhance the sealing effect between the first through hole 1801 and the piston valve core 30.

[0094] Optionally, the outer side wall of the valve body 10 is provided with a positioning portion 104 at the outlet of the second channel 102, and the side of the top plate 601 facing the valve body 10 is provided with a positioning matching portion 6013 matched with the positioning portion 104, and the positioning portion 104 and the positioning matching portion 6013 are connected through concave-convex matching to limit the relative position of the valve body 10 and the top plate 601.

[0095] Optionally, the positioning portion 104 and the positioning matching portion 6013 are both stepped, and the stepped surfaces of the two are in contact with each other. The stepped structure makes the contact area of the positioning portion 104 and the positioning matching portion 6013 larger, and the positioning is more stable, avoiding the positioning deviation caused by the too small contact area; the stepped surfaces in contact with each other can form multiple axial and radial limits, further limiting the relative movement of the valve body 10 and the top plate 601. In addition, the stepped surface in contact can form a sealing auxiliary effect, reducing the risk of air leakage from the gap between the valve body 10 and the top plate 601.

[0096] Optionally, a sealing structure 603 (such as a first sealing ring 6012) is arranged at the contact position of the positioning portion 104 and the positioning matching portion 6013 to prevent air leakage from the gap between the positioning portion 104 and the positioning matching portion 6013.

[0097] Optionally, the driving device and the first support frame 60 are detachably connected. For example, the bottom plate 602 of the first support frame 60 is provided with a second through hole 1801, the motor 401 of the driving device is fixedly connected to the side of the bottom plate 602 away from the top plate 601 by bolts or buckles, and the end of the screw rod 402 away from the motor 401 is threadedly connected to the mounting portion 3013 of the piston valve core 30 after penetrating through the second through hole 1801.

[0098] Optionally, the limiting structure includes a limiting plate 701 and a fixing block 702. The limiting plate 701 is detachably connected to the valve core body 301 by bolts, and the fixing block 702 is directly or indirectly fixed to the bottom plate 602 of the first support frame 60. The fixing block 702 is provided with a sliding groove 7021 extending along the axial direction of the valve core body 301. The end of the limiting plate 701 away from the valve core body 301 is inserted into the sliding groove 7021 and slides along the sliding groove 7021 to limit the rotation of the valve core body 301 around its axis, and to ensure the stable reciprocating movement of the valve core body 301 in the axial direction.

[0099] Optionally, it further includes a first housing 80, which defines a containing cavity 3012 for accommodating the breather valve, the demand valve 20, the first support frame 60, the driving device and the first electric control board 50. The side wall of the first housing 80 is provided with a plurality of breather holes 801. When the piston valve core 30 is away from the second passage 102 of the valve body 10, the second passage 102 is connected to the external environment in sequence through the first through hole 1801 of the top plate 601, the internal space of the first support frame 60 and the breather holes 801, to realize normal ventilation.

[0100] The vent hole 801 of the side wall of the first shell 80 can make the second channel 102 sequentially communicate with the external environment through the first through hole 1801 of the top plate 601, the internal space of the first support frame 60 and the external environment when the piston valve core 30 is away from the second channel 102, provide an airflow flow path for the conventional ventilation test, ensure that the airflow can smoothly enter and exit the device during the conventional ventilation, and guarantee the ventilation effect; at the same time, the vent hole 801 can assist in heat dissipation inside the device, avoid the accumulation of heat generated by long-time work of internal components (such as the motor 401 and the first electric control board 50), and improve the working stability of the device.

[0101] Optionally, the side wall of the first shell 80 is also provided with a connecting port through which a connecting pipeline of the demand valve 20 and an external gas source is arranged. The connecting port provides a dedicated through channel for the connecting pipeline of the demand valve 20 and the external gas source, ensuring the stability and safety of the pipeline connection.

[0102] Optionally, the digital handle includes a handle assembly and a flow rate tube, and the flow rate tube is detachably connected with the handle assembly; the handle assembly includes a handle shell 250, which limits a receiving cavity 2501, and a first pressure sensor 270 is installed in the receiving cavity 2501; a fixed cover 300 is connected with the handle shell 250, and the fixed cover 300 is used for detachably fixing the flow rate tube.

[0103] The detachable connection between the flow rate tube and the handle assembly makes them be able to be processed, maintained or replaced separately (for example, when the flow rate tube is damaged, only the flow rate tube needs to be replaced, without replacing the entire handle), thereby reducing the use and maintenance cost; at the same time, different specifications of the flow rate tube (such as different pipe diameters of the measurement section 2103) can be replaced according to the measurement requirements, thereby improving the application range of the digital handle.

[0104] The first pressure sensor 270 and a circuit board are installed in the receiving cavity 2501 of the handle shell 250 of the handle assembly, so as to realize the integrated integration of the measurement element 220 (flow rate tube) and signal acquisition (first pressure sensor 270), without the need of an additional independent sensor, thereby simplifying the overall structure of the equipment, improving the portability, and being suitable for mobile measurement scenes (such as on-site detection and handheld operation). The fixed cover 300 is specially used for detachably fixing the flow rate tube, so as to ensure that the flow rate tube will not be displaced during the measurement process (such as shaking during handheld operation).

[0105] The functions of the first pressure sensor 270 in the embodiment include but are not limited to measuring the pressure difference between the total pressure channel 2203 and the static pressure channel 2204 and measuring the absolute pressure value of the pressure channel 2110.

[0106] Optionally, the accommodating cavity 2501 of the handle shell 250 is provided with an axially extending sensor mounting bracket 2502, and the bracket is provided with a mounting groove matched with the outer shape of the first pressure sensor 270 and the differential pressure sensor, and the inner wall of the mounting groove is provided with a conductive contact point, and the sensor is in contact with the conductive contact point to realize electrical connection, and the bottom of the bracket is provided with a heat dissipation rib.

[0107] Optionally, the inner wall of the accommodating cavity 2501 of the handle shell 250 is provided with an axially extending cable clamping groove for fixing the cable connected between the sensor and an external device, and the outlet end of the cable clamping groove is provided with a waterproof sealing ring.

[0108] Optionally, the fixed cover 300 comprises: a base 2601 which is a semicircular member and is arranged at the top of the handle shell 250 and is configured with a second through opening 1801 which is in communication with the accommodating cavity 2501 of the handle shell 250; and an inner bottom shell 2602 which is detachably connected to the inside of the base 2601 and defines a first accommodating groove 26021 matched with the outer shape of the flow rate tube, and the bottom wall of the first accommodating groove 26021 is configured with a second hollow part 26022 for avoiding the mounting seat 240 of the flow rate tube, so that the connecting pipe or the quick connector is connected with the total pressure channel 2203, the static pressure channel 2204, and the sampling channel 2108 of the sample collection hole 2107, the pressure channel 2110 of the absolute pressure collection hole 2109 which pass through the mounting seat 240.

[0109] The semicircular base 2601 is arranged at the top of the handle shell 250, and the second through opening 1801 thereof realizes the channel communication between the accommodating cavity 2501 (sensor) and the flow rate tube (such as the total pressure channel 2203, the static pressure channel 2204 and the sensor interface), thereby providing a channel for pressure signal transmission.

[0110] Optionally, the fixed cover 300 further comprises: an upper cover 2603 which is clamped with the base 2601 or the inner bottom shell 2602, and the upper cover 2603 defines a second accommodating groove 26031 matched with the outer shape of the flow rate tube, so as to limit and fix the flow rate tube.

[0111] The upper cover 2603 is clamped with the base 2601 / inner bottom shell 2602, and the second accommodating groove 26031 of the upper cover 2603 cooperates with the first accommodating groove 26021 to form a complete flow rate tube fixing space, thereby limiting and fixing the flow rate tube from the top and bottom sides, and further improving the fixing stability of the flow rate tube.

[0112] Optionally, the fixed cover 300 further comprises: a clamping member 2604 arranged at the second hollow part 26022 of the inner bottom shell 2602, and the inner side wall of the clamping member 2604 is matched with the outer side wall of the mounting seat 240, and the clamping member 2604 is used to clamp the outer side wall of the flow rate tube for fixation; and the edge of the second accommodating groove 26031 of the upper cover 2603 forms a nested limiting structure with the top of the clamping member 2604.

[0113] The edge of the second accommodating groove 26031 of the upper cover 2603 and the nesting structure of the top of the clamping piece 2604 form multi-dimensional limiting (up-down direction - the upper cover 2603 and the bottom inner shell 2602; radial direction - the clamping piece 2604), which further improves the fixing reliability of the flow rate tube, and simultaneously realizes the position linkage of the upper cover 2603 and the clamping piece 2604 through the nesting cooperation, thereby simplifying the installation and positioning process.

[0114] Optionally, the sealing gasket 2605 is arranged between the clamping piece 2604 and the flow rate tube, and is used to seal the connecting pipeline or quick connector of the flow rate tube connected with the first pressure sensor 270 and the analyzer.

[0115] Optionally, the flow rate tube comprises: a tube body 210, which is a hollow tubular structure, and sequentially comprises an inlet section 2101, a contraction section 2102, a measurement section 2103 and a diffusion section 2104 along the fluid flow direction, and the inner cavities of the inlet section 2101, the contraction section 2102, the measurement section 2103 and the diffusion section 2104 are communicated to form a main channel 2106 for fluid flow; a measurement element 220, which is arranged in the measurement section 2103 of the tube body 210, and has a front end face facing the inlet section 2101 and a rear end face away from the inlet section 2101, the front end face is provided with a total pressure tapping hole 2201, and the rear end face or the outer peripheral wall is provided with a static pressure tapping hole 2202; wherein, the measurement element 220 is internally provided with a total pressure channel 2203 and a static pressure channel 2204 which are independent of each other and extend in parallel, the total pressure channel 2203 is communicated with the total pressure tapping hole 2201 and extends to the outside of the measurement element 220 to connect the first pressure sensor 270, and the static pressure channel 2204 is communicated with the static pressure tapping hole 2202 and extends to the outside of the measurement element 220 to connect the first pressure sensor 270, the total pressure signal and the static pressure signal are transmitted through the total pressure channel 2203 and the static pressure channel 2204 respectively, and are used to calculate the differential pressure or flow rate of the fluid.

[0116] The flow rate tube provided by the embodiment forms a main channel 2106 in line with the law of fluid mechanics through the segmented design of the tube body 210 including an inlet section 2101, a contraction section 2102, a measurement section 2103, and a diffusion section 2104. The contraction section 2102 can accelerate and straighten the fluid, and the diffusion section 2104 can reduce the fluid flow rate to reduce energy loss and provide a stable flow field environment for accurate measurement. The front end surface total pressure tapping hole 2201 and the rear end surface / outer peripheral wall static pressure tapping hole 2202 of the measurement element 220 respectively collect total pressure and static pressure, and are matched with the internal independent parallel total pressure channel 2203 and the static pressure channel 2204 to avoid mutual interference of the two pressure signals in the transmission process and ensure the accuracy of the pressure signal transmission. The pressure signal is transmitted to the external first pressure sensor 270 through the independent channel to directly acquire the fluid pressure parameter without complex conversion structure, simplify the measurement process, and improve the usability and measurement efficiency of the flow rate tube.

[0117] Optionally, the fluid flow direction in the main channel 2106 is along the axis direction of the tube body 210, flowing from the inlet section 2101 to the diffusion section 2104, ensuring that the flow path of the fluid in the tube body 210 is adapted to the segmented structure (inlet section 2101-contraction section 2102-measurement section 2103-diffusion section 2104) of the tube body 210, avoiding unstable flow field caused by chaotic fluid flow direction, and ensuring the normal performance of the functions (acceleration and straightening, pressure acquisition, and speed reduction) of the contraction section 2102, the measurement section 2103, and the diffusion section 2104.

[0118] Optionally, the axis of the tube body 210 is the central axis of the main channel 2106. The coincidence of the axis of the tube body 210 and the central axis of the main channel 2106 ensures that the inner walls of the sections (inlet section 2101, contraction section 2102, measurement section 2103, and diffusion section 2104) of the tube body 210 are symmetrically distributed around the center of the main channel 2106, so that the fluid flowing in the main channel 2106 will not produce directional flow due to channel eccentricity, reducing flow field disturbance and ensuring uniform flow rate distribution of the fluid in the measurement section 2103.

[0119] Optionally, the contraction section 2102 is a tapered tube section gradually narrowing in the axial direction of the tube body 210 from the inlet section 2101 to the measurement section 2103; and / or, the diffusion section 2104 is a tapered tube section gradually widening in the axial direction of the tube body 210 from the measurement section 2103 away from the inlet section 2101.

[0120] The taper structure gradually narrowing from the inlet section 2101 to the measuring section 2103 in the axial direction can perform gradient acceleration on the entering fluid, so that the fluid forms a stable flow field with a certain flow rate before entering the measuring section 2103. The taper structure gradually widening from the measuring section 2103 to the side away from the inlet section 2101 in the axial direction can perform gradient deceleration on the fluid passing through the measuring section 2103, reduce the energy loss of the fluid due to too high flow rate, and reduce the vortex phenomenon of the fluid at the outlet of the pipe body 210, thereby avoiding the reverse interference of the vortex on the flow field of the upstream measuring section 2103.

[0121] Optionally, the measuring section 2103 is a straight pipe section connected between the contraction section 2102 and the diffusion section 2104.

[0122] The measuring section 2103 is arranged as a straight pipe section connected between the contraction section 2102 and the diffusion section 2104, so that the fluid can form a uniform and stable laminar flow state in the measuring section 2103 after being accelerated in the contraction section 2102, thereby avoiding the fluctuation of the flow rate of the fluid due to the irregular shape of the channel; the straight channel structure also facilitates the fixed installation of the measuring element 220, and ensures that the pressure tapping hole position of the measuring element 220 is accurate and maintains a preset angle with the flow direction of the fluid.

[0123] Optionally, the taper of the contraction section 2102 is 30°-60°, the taper of the diffusion section 2104 is 30°-60°, the minimum inner diameter of the contraction section 2102 is consistent with the inner diameter of the measuring section 2103, and the maximum inner diameter of the diffusion section 2104 is not less than the inner diameter of the inlet section 2101.

[0124] The minimum inner diameter of the contraction section 2102 is consistent with the inner diameter of the measuring section 2103, so as to ensure that there is no stepwise mutation when the fluid enters the measuring section 2103 from the contraction section 2102, thereby avoiding the flow field disturbance caused by the sudden change of the inner diameter of the channel; the maximum inner diameter of the diffusion section 2104 is not less than the inner diameter of the inlet section 2101, so as to enable the fluid decelerated by the diffusion section 2104 to be smoothly discharged, reduce the flow resistance at the outlet, and further reduce the risk of flow field disorder.

[0125] Optionally, the pipe body 210 further comprises a straight flow section 2105 connected to the diffusion section 2104, and the straight flow section 2105 is located on the side of the diffusion section 2104 away from the measuring section 2103; wherein the straight flow section 2105 is a straight pipe section, which can further straighten the fluid decelerated by the diffusion section 2104.

[0126] Optionally, the measuring element 220 is a flat member, the flat surface of the measuring element 220 is parallel to the fluid flow direction in the main passage 2106, and the axis of the measuring element 220 is perpendicular to the axis of the pipe body 210. The flat measuring element 220 can reduce the cross-sectional dimension thereof in the main passage 2106, reduce the obstruction to the fluid flow, reduce the vortex generated by the element, and further reduce the flow resistance; meanwhile, the directional arrangement can ensure that the total pressure tapping hole 2201 of the front end surface is directly opposite to the fluid incoming direction, and meet the fluid mechanics requirements for total pressure acquisition.

[0127] Optionally, the ratio of the thickness dimension of the measuring element 220 along the radial direction of the pipe body 210 to the width dimension along the axial direction of the pipe body 210 is 1:3-1:10, which further optimizes the flat structure of the measuring element 220, while ensuring the structural strength of the element (sufficient support is provided in the width direction), maximally reduces the dimension in the thickness direction, reduces the obstruction area to the fluid flow, and reduces the flow field disturbance.

[0128] Optionally, the two ends of the measuring element 220 are fixed to the inner wall of the measuring section 2103, and a gap for fluid flow is left between the outer peripheral wall of the measuring element 220 and the inner wall of the measuring section 2103. Optionally, the measuring element 220 and the measuring section 2103 are fixed by welding, threaded connection, fixed connection or one-piece forming.

[0129] Optionally, the opening 1302 of the total pressure tapping hole 2201 is in the same direction as the fluid flow direction in the main passage 2106, so as to form a stagnation point at the total pressure tapping hole 2201 and acquire the total pressure of the fluid. The fluid forms a stagnation point (the fluid velocity is reduced to zero) at the total pressure tapping hole 2201, and the acquired pressure is the total pressure (stagnation point pressure) of the fluid at this time, which meets the principle requirements for total pressure acquisition in fluid mechanics, and avoids that the acquired pressure contains the flow velocity component due to the deviation of the opening 1302.

[0130] Optionally, the front end surface where the total pressure tapping hole 2201 is located is flush with the outlet end of the contraction section 2102 of the pipe body 210, or is located in the contraction section 2102; and / or, the rear end surface where the static pressure tapping hole 2202 is located is flush with the inlet end of the diffusion section 2104 of the pipe body 210, or is located in the diffusion section 2104. The total pressure can be acquired after the fluid accelerates through the contraction section 2102, before entering the measuring section 2103 or just after entering the measuring section 2103, and the static pressure can be acquired after the fluid passes through the measuring section 2103, before decelerating through the diffusion section 2104 or just after entering the diffusion section 2104, at which time the fluid has completed the preliminary rectification and the flow velocity is stable, and more accurate total pressure data and static pressure data can be acquired.

[0131] Optionally, the side wall of the measuring section 2103 is provided with a sample collection hole 2107, which is connected to the gas analyzer through a sampling channel 2108 extending to the outside of the pipe body 210, for collecting a fluid sample.

[0132] The sample collection hole 2107 is provided in the side wall of the measuring section 2103 and connected to the gas analyzer through the sampling channel 2108, so that the flow rate pipe can collect a fluid sample for composition analysis at the same time of measuring the fluid pressure difference / flow rate, realizing the integration of "flow rate measurement and sample analysis", without the need of setting an independent sample collection device, simplifying the equipment structure, improving the detection efficiency, and being suitable for scenarios requiring simultaneous acquisition of fluid flow rate and composition information (such as gas detection and fluid quality monitoring).

[0133] Optionally, the pipe wall of the measuring section 2103 is also provided with an absolute pressure collection hole 2109, which is connected to the first pressure sensor 270 through a pressure channel 2110 extending to the outside of the pipe body 210, for collecting the absolute pressure of the fluid. In combination with the previously acquired total pressure and static pressure data, the pressure parameters of the fluid can be more comprehensively mastered; at the same time, the absolute pressure data can be used as an auxiliary parameter for flow rate calculation, further improving the accuracy of flow rate calculation.

[0134] Optionally, the sample collection hole 2107 and the absolute pressure collection hole 2109 are respectively located on the two sides of the measuring element 220 and distributed along the radial direction of the pipe body 210. The sample collection hole 2107 and the absolute pressure collection hole 2109 are respectively located on the two sides of the measuring element 220, which can avoid mutual interference during the collection process and ensure independent and stable operation of the two collection functions.

[0135] Optionally, it further includes a grid 230, which is a grid-shaped member located at the end of the inlet section 2101 of the pipe body 210, formed by a plurality of groups of mutually perpendicular grid bars to form regular grid channels, can pre-straighten the fluid entering the pipe body 210, filter large particle impurities in the fluid (to avoid blockage of the main channel 2106 or damage to the measuring element 220), and at the same time break the irregular vortex of the fluid, so that the fluid enters the inlet section 2101 in a more uniform and stable state.

[0136] Optionally, further comprising: a mounting seat 240 arranged along the outer circumferential surface of the measuring section 2103 of the pipe body 210 and corresponding to the position of the measuring element 220; wherein the total pressure channel 2203, the static pressure channel 2204 of the measuring element 220, and the sampling channel 2108 of the sample collection hole 2107 and the pressure channel 2110 of the absolute pressure collection hole 2109 all penetrate the mounting seat 240, for connecting with the external first pressure sensor 270 or gas analyzer, realizing integrated management of each channel, avoiding pipeline confusion caused by scattered arrangement of channels, and facilitating subsequent connection with external sensors or analyzers. The arrangement of the mounting seat 240 provides a unified connection interface position for external equipment, without the need for directly processing complex connection structures on the pipe body 210, thereby simplifying the pipe body 210 processing technology.

[0137] Optionally, the end surface of the mounting seat 240 away from the pipe body 210 is trapezoidal, for guiding the installation angle and position. The trapezoidal end surface can serve as a visual and physical guiding structure during installation, and the operator can judge the orientation and angle of the mounting seat 240 through the hypotenuse or base of the trapezoid, quickly positioning the connection position of the external sensor or pipeline, avoiding misalignment of channel docking due to installation angle deviation, and being particularly suitable for on-site rapid installation scenarios.

[0138] Optionally, the outer end of the total pressure channel 2203, the static pressure channel 2204, and the sampling channel 2108 of the sample collection hole 2107 and the pressure channel 2110 of the absolute pressure collection hole 2109 is provided with a threaded interface or a quick plug connector, for sealed connection with the pipeline of the first pressure sensor 270 or the analyzer.

[0139] Optionally, the first mechanical arm 350 and / or the second mechanical arm 360 has multiple degrees of freedom, and the spatial position of the ventilation module and the airway resistance module is adjusted through the degrees of freedom to adapt to different subjects. By adjusting the position of the ventilation module and the airway resistance module through the multi-degree-of-freedom mechanical arm, subjects of different heights and postures (sitting / standing) can be adapted, avoiding unnatural breathing postures caused by fixed equipment positions and improving the accuracy of detection data.

[0140] The multi-degree-of-freedom design (such as translation along X / Y / Z axes and rotation around axes) of the first mechanical arm 350 and the second mechanical arm 360 can accurately adjust the height, front-to-back distance, and angle of the ventilation module and the airway resistance module according to the height (adult / child), posture (sitting / standing), and body size of the subject, ensure that the module interfaces are aligned with the mouth and nose positions of the subject, avoid unnatural breathing postures (such as bending over and looking up) caused by fixed equipment positions, reduce respiratory airflow disturbance, and improve the accuracy of detection data.

[0141] Optionally, the airway resistance module comprises: a T-shaped tube having a first connecting tube 901 and a second connecting tube 902 in communication with each other, the first connecting tube 901 is connected with the flow rate tube of the digital handle at one end away from the second connecting tube 902; a terminal resistor 100 arranged at the end of the second connecting tube 902 away from the first connecting tube 901; and an oscillator 110 arranged at the side of the first connecting tube 901 away from the digital handle and in communication with the airflow channel of the first connecting tube 901, the oscillator 110 is configured to superimpose a pulse signal on the respiratory airflow of the subject.

[0142] The first connecting tube 901 of the T-shaped tube is sealingly connected with the flow rate tube of the digital handle, avoiding pressure data distortion caused by air leakage, and ensuring that the pressure signal collected by the digital handle can truly reflect the pressure change in the airway; the terminal resistor 100 at the end of the second connecting tube 902 provides a stable reference resistance, so that the system can calculate the airway resistance parameter by comparing the actual resistance with the reference resistance. The oscillator 110 superimposes a pulse signal on the respiratory airflow, which can amplify the pressure fluctuation caused by the change of airway resistance (such as greater attenuation amplitude of the pulse signal when the airway is narrow), so that the digital handle can capture subtle resistance differences more clearly, especially suitable for detecting early airway lesions (such as mild asthma), and improving the recognition ability of the detection system to subclinical state.

[0143] Optionally, the airway resistance module further comprises: a second housing 120, which defines a cavity for accommodating the T-shaped tube, the terminal resistor 100 and the oscillator 110; wherein the side wall of the second housing 120 is provided with a vent 1201 corresponding to the passage of the terminal resistor 100, so as to communicate the T-shaped tube with the external environment through the passage of the terminal resistor 100.

[0144] The T-shaped tube serves as the airflow center, receives the respiratory airflow of the subject through the first connecting tube 901, and simultaneously enables the vibration pressure generated by the oscillator 110 to be accurately superimposed on the respiratory airflow through the airflow channel in communication with the oscillator 110, so as to generate a composite signal of the respiratory airflow and the vibration pressure; the composite airflow is divided into the second connecting tube 902 (simulating the physiological resistance of the human body) through the T-shaped tube, and a stable terminal resistance is formed by the terminal resistor 100, which provides a necessary resistance reference for analyzing the impedance of the respiratory system; the three are cooperated through the path of airflow transmission-signal superposition-resistance effect, which fully covers the core needs of signal loading-resistance feedback in respiratory detection, and ensures that the impedance characteristics of the respiratory system can be calculated through pressure and flow analysis.

[0145] This embodiment establishes a clear respiratory airflow transmission path through interconnected first connecting tube 901 and second connecting tube 902. The end of the first connecting tube 901 furthest from the second connecting tube 902 is specifically connected to the subject's breathing end via a digital handheld device or motion flow meter, ensuring stable reception of respiratory airflow and preventing a chaotic airflow transmission path. A terminal resistance is formed at the end of the second connecting tube 902 furthest from the first connecting tube 901. By pre-setting this terminal resistance, it can be superimposed on the subject's respiratory system resistance, providing a crucial reference for subsequent separation and calculation of the subject's own respiratory resistance. This ensures accurate capture of changes in respiratory airflow resistance, providing resistance data support for assessing respiratory organ obstruction.

[0146] The second outer shell 120 integrates and fixes the T-tube, oscillator 110, and terminal resistance 100 through the receiving cavity 3012. Through the corresponding design of the side wall vent 1201 and the terminal resistance 100 passage, a complete flow loop is formed between the airflow inside the T-tube, the terminal resistance 100, the vent 1201, and the external environment. This prevents airflow stagnation from causing abnormal pressure, ensures the stability of airflow pressure and flow parameters during the detection process, and provides a reliable data basis for accurate analysis.

[0147] Optionally, the flow area of ​​the first connecting pipe 901 is larger than that of the second connecting pipe 902. By differentiating the flow areas of the first connecting pipe 901 and the second connecting pipe 902, a reasonable airflow acceleration or pressure change can be formed when the airflow flows from the first connecting pipe 901 to the second connecting pipe 902, which can meet the airflow resistance detection requirements of the terminal resistance device 100.

[0148] Optionally, a second annular groove 9011 is formed on the inner sidewall of the opening of the first connecting pipe 901 away from the second connecting pipe 902. A second sealing ring is embedded in the second annular groove 9011 to achieve a seal between the pipe opening and the mating component. Preferably, the inner annular surface of the second sealing ring protrudes from the inner sidewall of the opening of the first connecting pipe 901.

[0149] Optionally, the terminal resistance device 100 has a hollow main structure with a through-flow channel inside; wherein, the end of the terminal resistance device 100 away from the second connection port is provided with a mesh element to create a preset resistance to airflow. This preset resistance serves as a known reference and can be superimposed with the subject's respiratory system resistance to form analyzable resistance data. Optionally, the mesh element can be a target stainless steel mesh.

[0150] Optionally, the terminal resistance 100 is sleeved on the opening of the second connecting pipe 902, and the end of the terminal resistance 100 extends from the inner edge of the flow channel toward the axial direction to form a second stop portion 1002 with a through opening 1003; wherein, the mesh element is disposed between the opening of the second connecting pipe 902 and the second stop portion 1002 for fixation.

[0151] The second stop 1002, which extends from the end of the terminal resistance device 100, cooperates with the opening of the second connecting pipe 902 to form a clamping space 190, fixing the mesh component between the two. This allows for stable installation of the mesh component without additional fixing components, simplifying the assembly structure and preventing the mesh component from shifting during the testing process, thus ensuring the stability of the preset resistance.

[0152] Optionally, the flow area of ​​the through-hole 1003 is less than or equal to the flow area of ​​the second connecting pipe 902.

[0153] Optionally, the outer side wall of the terminal resistance device 100 is provided with an outwardly protruding second connecting part 1004, and a second threaded hole 1005 is provided through the second connecting part 1004, which is connected to the flow channel of the terminal resistance device 100.

[0154] Optionally, the second threaded hole 1005 is connected to the flow channel of the terminal resistance device 100, which can serve as an auxiliary passage or detection interface for airflow. This facilitates the connection of external pressure sensors and other components to monitor the airflow parameters in the channel in real time, expanding the detection function of the device. At the same time, it can also realize the diversion or adjustment of airflow when necessary, improving the flexibility of the device.

[0155] Optionally, it also includes: an end cap 130, which is detachably connected to the second housing 120 to close the receiving cavity 3012; wherein the end cap 130 has an opening 1302 for the port of the first connecting tube 901 to pass through, and the port of the first connecting tube 901 protrudes from the outer surface of the end cap 130 after passing through the opening 1302.

[0156] Optionally, the side wall of the end cap 130 is provided with a clearance opening 1301 so that when the end cap 130 is detachably connected to the second housing 120, the clearance opening 1301 is used to provide clearance for the terminal resistance device 100.

[0157] Optionally, it further includes: a second support frame 140, disposed within the receiving cavity 3012 of the second housing 120; a control board 150, located within the receiving cavity 3012 of the second housing 120, and electrically connected to the oscillator 110; wherein the control board 150 and the oscillator 110 are detachably connected to the second support frame 140, and the control board 150 and the T-shaped tube are respectively distributed on both sides of the oscillator 110.

[0158] Optionally, at the end of the T-shaped tube where the first connecting tube 901 and the second connecting tube 902 are connected, a flange 160 is formed by extending radially outward along the first connecting tube 901, and the flange 160 is detachably connected to the second support frame 140.

[0159] Optionally, the flange 160 is coaxially arranged with the first connecting pipe 901. Optionally, it also includes a connecting plate 170, coaxially arranged with the flange 160, the connecting plate 170 being configured to connect the flange 160 and the second support frame 140; wherein the connecting plate 170 has a through port 1801, the through port 1801 being used to connect the oscillator 110 and the first connecting pipe 901.

[0160] Optionally, it also includes a gas analysis module 340, which is connected to the sampling channel 2108 of the digital handheld device via a pipeline, for detecting and analyzing the components of the collected gas samples; wherein the gas analysis module 340 is located inside the trolley. The gas analysis module 340 is connected to the sampling channel 2108 of the digital handheld device, and can simultaneously detect key components in the respiratory gas (such as CO2 and O2 concentrations). Combined with the pressure and flow rate data collected by the digital handheld device, it can realize the linkage assessment of lung function and gas exchange efficiency (such as judging alveolar ventilation function through changes in CO2 concentration), providing a more comprehensive basis for clinical diagnosis (such as differentiating between obstructive pulmonary disease and restrictive pulmonary disease).

[0161] The gas analysis module 340 is integrated into the middle mounting area of ​​the trolley and fixed to the trolley body 320 with bolts. Heat dissipation holes are provided on the outside of the module to prevent overheating during operation. The gas analysis module 340 includes a gas sampling pump, a gas filter, an infrared gas sensor (for detecting CO2 concentration), and an electrochemical sensor (for detecting O2 concentration). These components are connected sequentially via pipelines. During detection, the gas sampling pump generates negative pressure, drawing in the gas sample from the digital handheld sampling channel 2108. After impurities are filtered out by the gas filter, the sample passes sequentially through the infrared gas sensor and the electrochemical sensor. The sensors convert the gas concentration signal into an electrical signal, which is transmitted to the controller 380. The controller 380 processes the signal and displays the gas component concentration data (such as CO2 concentration and O2 concentration) through the display module 370.

[0162] Optionally, it also includes: a motion flow meter, detachably connected to the ventilation module or airway resistance module, used to perform routine pulmonary function tests. The motion flow meter is specifically designed for routine pulmonary function tests (such as vital capacity and forced vital capacity), and its detachable connection allows the testing system to flexibly switch between professional airway resistance testing and routine pulmonary function screening, eliminating the need to purchase two separate devices and reducing equipment investment costs for medical institutions. Installation of the motion flow meter does not require modification of the core system structure (only the digital handle needs to be disassembled for connection), allowing medical staff to quickly complete module replacement.

[0163] Optionally, the motion flow meter includes: a velocity tube and a base 280. The total pressure channel 2203 of the velocity tube communicates with the total pressure tapping hole 2201 and extends radially along the tube body 210 to the outer wall of the tube body 210 to form a total pressure channel opening 22031. The static pressure channel 2204 communicates with the static pressure tapping hole 2202 and extends radially along the tube body 210 to the outer wall of the tube body 210 to form a static pressure channel opening 22041. The base 280 has an internally constructed total pressure transmission channel 2801 and static pressure transmission channel 2802, which are independently configured. The pressure transmission channel 2801 is connected to the total pressure channel port 22031, and the static pressure transmission channel 2802 is connected to the static pressure channel port 22041. The side wall of the substrate is provided with a total pressure connection port 2804 connected to the total pressure transmission channel 2801 and a static pressure connection port 2805 connected to the static pressure transmission channel 2802. The total pressure connection port 2804 and the static pressure connection port 2805 are directly and sealed to the two detection ends of the second pressure sensor 310, respectively, so as to calculate the pressure difference or flow rate of the fluid in the velocity tube by collecting the total pressure signal and the static pressure signal.

[0164] The flow meter provided in this embodiment achieves an integrated design of the total pressure and static pressure tapping structure with the flow tube by fixing a measuring element 220 inside the tube body 210 of the flow tube and constructing independent total pressure channels 2203 and static pressure channels 2204 inside the measuring element 220. This avoids the problems of external pressure tapping components being susceptible to fluid impact and complicated installation. The total pressure channel 2203 extends radially along the tube body 210 to the outer side wall to form a total pressure channel opening 22031, and the static pressure channel 2204 similarly forms a static pressure channel opening 22041. Furthermore, the independent total pressure transmission channels 2801 and static pressure transmission channels 2802 inside the base 280 are connected to the corresponding channel openings, ensuring that the total pressure signal and static pressure signal are communicated. The transmission process is independent and interference-free, effectively avoiding pressure signal distortion caused by channel crossflow. The total pressure connection port 2804 and static pressure connection port 2805 on the side wall of the base 280 are directly and sealed to the two detection ends of the second pressure sensor 310, eliminating the need for additional transfer pipelines. On the one hand, this simplifies the connection structure between the motion flow meter and the second pressure sensor 310, reduces assembly complexity, and reduces the overall size design. On the other hand, the direct sealed connection reduces connection nodes, reduces the risk of pressure signal leakage during the transfer process, and further ensures the reliability of the detection data. Finally, by accurately collecting the total pressure and static pressure signals, the pressure difference or flow rate of the fluid in the flow velocity pipe can be accurately calculated.

[0165] Optionally, the total pressure connection port 2804 and the static pressure connection port 2805 are located on the same side wall of the base 280, so that the two detection ends of the second pressure sensor 310 can be connected on the same side of the base 280 without the need for installation operations across both sides of the base 280, which greatly simplifies the installation layout of the second pressure sensor 310 and reduces the space occupied by the installation.

[0166] Optionally, the total pressure connection port 2804 and the static pressure connection port 2805 are staggered to effectively avoid structural interference when the two connection ports are connected to the detection end of the second pressure sensor 310.

[0167] Optionally, the total pressure transmission channel 2801 includes at least two total pressure branch channels 28011, and the total pressure branch channels 28011 are connected to the total pressure connection port 2804 in a one-to-one correspondence; the static pressure transmission channel 2802 includes at least two static pressure branch channels 28021, and the static pressure branch channels 28021 are connected to the static pressure connection port 2805 in a one-to-one correspondence; by synchronously acquiring two sets of pressure signals, dual-channel detection and data comparison calibration of fluid pressure difference or flow rate can be achieved.

[0168] Optionally, the distance from the axis of at least one total pressure branch channel 28011 to the axis of the total pressure transmission channel 2801 is greater than the distance from the axis of another total pressure branch channel 28011 to the axis of the total pressure transmission channel 2801. By differentiating the axial distances between the total pressure branch channel 28011 and the total pressure transmission channel 2801, the position of the total pressure connection port 2804 on the base 280 can be flexibly adjusted, enabling the adaptation of second pressure sensors 310 of different sizes and with different installation interface layouts. This avoids installation interference caused by multiple total pressure connection ports 2804 being too concentrated in one location, and optimizes the space utilization of the side wall of the base 280.

[0169] Similarly, the distance from the axis of at least one static pressure branch channel 28021 to the axis of the static pressure transmission channel 2802 is greater than the distance from the axis of the other static pressure branch channel 28021 to the axis of the static pressure transmission channel 2802.

[0170] Optionally, the axis of the total pressure channel port 22031 is located between the two total pressure branch channels 28011. Preferably, the axis of the total pressure channel port 22031 is located on the symmetrical center line of the two total pressure branch channels 28011. This allows for a uniform distribution of the total pressure signal between the two total pressure branch channels 28011, avoiding excessive deviation in the dual-channel total pressure detection data.

[0171] Similarly, the axis of the static pressure channel port 22041 is located between the two static pressure branch channels 28021. Preferably, the axis of the static pressure channel port 22041 is located on the symmetrical center line of the two static pressure branch channels 28021.

[0172] Optionally, the base 280 also has a total pressure connection channel 2806 for connecting the total pressure channel port 22031 and the total pressure transmission channel 2801; the axis of the total pressure connection channel 2806 is located between the two total pressure branch channels 28011. Preferably, the axis of the total pressure connection channel 2806 is located on the symmetrical center line of the two total pressure branch channels 28011.

[0173] The configuration of the total pressure connection channel 2806 provides a transition structure for the connection between the total pressure channel port 22031 and the total pressure transmission channel 2801. In particular, when there is a deviation in the installation position between the flow tube and the base 280, the size or angle of the total pressure connection channel 2806 can be adjusted to achieve adaptation, thereby improving the flexibility of the connection between the two.

[0174] Similarly, the base 280 also has a static pressure connection channel 2807 to connect the static pressure channel port 22041 and the static pressure transmission channel 2802. The axis of the static pressure connection channel 2807 is located between the two static pressure branch channels 28021. Preferably, the axis of the static pressure connection channel 2807 is located on the symmetrical center line of the two static pressure branch channels 28021. The setting of the static pressure connection channel 2807 improves the flexibility of the connection between the static pressure channel port 22041 and the static pressure transmission channel 2802, and facilitates the setting of the sealing structure 603. Its axis is located between the two static pressure branch channels 28021 (especially the symmetrical center line), which can realize the uniform distribution of static pressure signals, ensure the consistency of dual-channel static pressure detection data, and further improve the overall detection accuracy.

[0175] Optionally, the axis of the total pressure channel port 22031 / total pressure connection channel 2806 is perpendicular to the axis of the total pressure transmission channel 2801, and the axis of the static pressure channel port 22041 / static pressure connection channel 2807 is perpendicular to the axis of the static pressure transmission channel 2802.

[0176] The vertical axis relationship allows the total pressure channel port 22031 / total pressure connection channel 2806 and total pressure transmission channel 2801 to form a compact right-angle layout. Similarly, this applies to the static pressure channel port 22041 / static pressure connection channel 2807 and static pressure transmission channel 2802. This can effectively shorten the overall length of the channel, reduce the space occupied inside the base 280, and make the structure of the base 280 more compact.

[0177] Optionally, the axis of the total pressure branch channel 28011 is perpendicular to the axis of the total pressure transmission channel 2801, and the axis of the static pressure branch channel 28021 is perpendicular to the axis of the static pressure transmission channel 2802.

[0178] Optionally, the main pressure channel port 22031 is connected to the main pressure connection channel 2806 via a pipeline, and the static pressure channel port 22041 is connected to the static pressure connection channel 2807 via a pipeline. For example, the pipeline can be a rigid pipe, with both ends inserted into the main pressure channel port 22031 and the main pressure connection channel 2806 respectively.

[0179] Optionally, the base 280 is also provided with a sampling transmission channel 2803, which is connected to the sampling channel 2108 and the sampling transmission channel 2803, and is connected to the gas analyzer.

[0180] Optionally, the base 280 has a first clamping arm 2808 and a second clamping arm 2809 on its surface facing the flow tube. The inner walls of the first clamping arm 2808 and the second clamping arm 2809 are adapted to the outer surface of the flow tube to restrict and fix the flow tube. At the same time, the clamping fixation does not require additional mounting holes on the flow tube, avoiding damage to the structural integrity of the flow tube and ensuring the strength of the flow tube and the stability of fluid delivery.

[0181] Optionally, the base 280 includes an L-shaped support portion 2810 and a channel portion 2811. The support portion 2810 is used to contact the flow tube to support and fix the flow tube. The channel portion 2811 is used to construct a total pressure transmission channel 2801, a static pressure transmission channel 2802, a total pressure connection port 2804, a static pressure connection port 2805, a total pressure connection channel 2806, a static pressure connection channel 2807, and a sampling transmission channel 2803. The second pressure sensor 310 is fixed on the side wall of the channel portion 2811.

[0182] Optionally, it also includes: a mounting gasket 290, disposed between the support portion 2810 and the flow tube, and provided corresponding to the mounting seat 240 of the flow tube, to seal the connection between the flow tube and the base 280.

[0183] Optionally, it also includes: a housing 300, which is detachably connected to the base 280 and encloses a chamber with the base 280 for accommodating the second pressure sensor 310 and the circuit board.

[0184] Optionally, the housing 300 can be detachably connected to both the support portion 2810 and the channel portion 2811 of the base 280, with the housing 300 covering the inner wall where the support portion 2810 and the channel portion 2811 intersect. The detachable connection between the housing 300 and the support portion 2810 and the channel portion 2811 makes the housing 300 more securely fixed, maintaining its protective state even under equipment vibration or minor external impact, further enhancing the overall protective reliability of the equipment.

[0185] Optionally, the trolley includes: a body 320 that encloses an installation cavity for installing functional components of the detection system; the installation cavity of the body 320 is arranged in layers, each layer corresponding to a door panel with an independent switch for storing different types of items; wherein, the first robotic arm 350 and the second robotic arm 360 are respectively fixed to the body 320 through a detachable connection structure.

[0186] The vehicle body 320 is made of high-strength alloy material, which encloses and forms a closed installation cavity. The installation cavity is divided into functional zones and adopts a layered layout (such as the upper layer is the installation area for the controller 380 and display module 370, the middle layer is the installation area for the gas analysis module 340, and the lower layer is the storage area for spare parts). Each layer is equipped with a door panel with an independent switch (the door panel is connected by hinges and equipped with a magnetic latch to ensure the sealing of the installation cavity when closed, so as to prevent dust from entering and affecting the life of the components), so as to realize the classified storage and protection of different types of items.

[0187] The outer wall of the trolley is equipped with a standardized installation interface. The base 2601 of the first robotic arm 350 and the second robotic arm 360 is detachably connected to this interface by bolts, which facilitates the installation, disassembly and maintenance of the robotic arms.

[0188] Optionally, it also includes an electrically connected display module 370 and a controller 380, both of which are located on the trolley. The controller 380 is configured to establish a signal connection with the functional modules of the detection system, and the display module 370 is used to display the working parameters and detection data of each functional module.

[0189] The controller 380 is equipped with multiple input and output interfaces, which are electrically connected to the motor 401 of the ventilation module, the oscillator 110 of the airway resistance module, the pressure sensor of the digital handle, the sensor of the gas analysis module 340, the pressure sensor of the motion flow meter, and the ECG module, respectively. It is used to receive the detection data of each module and send control commands to adjust the working status of each module. The controller 380 also has a data storage unit inside.

[0190] The display module 370 can be a touch screen, electrically connected to the controller 380, and fixedly mounted on the trolley. The display content includes, but is not limited to: the working parameters of each functional module (such as the position of the robotic arm, the frequency of the oscillator 110, and the speed of the sampling pump), real-time detection data (such as respiratory pressure, airflow velocity, and gas concentration), and detection result reports (such as airway resistance value, vital capacity value, and electrocardiogram waveform). It also supports touch operation, allowing users to input subject information (such as name, age, height, and weight), select detection items, and start or stop detection through the display screen.

[0191] Optionally, the side wall of the vehicle body 320 is provided with multiple electrical interfaces 3201, each of which is electrically connected to the controller 380. The electrical interfaces 3201 are used to realize the expansion connection of external devices.

[0192] The side wall of the vehicle body 320 has multiple electrical interfaces 3201 (including USB interface, Type-C interface, RS485 communication interface, and power interface). All electrical interfaces 3201 are electrically connected to the controller 380 through wires, and can be expanded to connect external devices (such as printers, data storage servers, and additional physiological parameter sensors) to realize the export, storage and collaborative operation of detection data.

[0193] Optionally, it also includes: an electrocardiogram module, electrically connected to the controller 380, for detecting electrocardiogram changes in the subject during exercise, so as to achieve a comprehensive assessment and test of human cardiopulmonary function.

[0194] The ECG module detects ECG changes during exercise. Combined with the system's existing pulmonary function parameters (such as airway resistance and vital capacity), it can achieve a linked assessment of cardiac and pulmonary functions (such as judging whether myocardial blood supply is affected by pulmonary function during exercise through changes in the ST segment of the ECG). It is especially suitable for the diagnosis of exercise-induced asthma and cardiopulmonary insufficiency, filling the gap in cardiac function detection when pulmonary function is not tested alone.

[0195] Traditional pulmonary function tests are mostly performed at rest, while the ECG module supports exercise state detection (such as when used with an exercise treadmill), which can simulate real-life scenarios (such as the cardiopulmonary response during a patient's daily activities), making the test results closer to the actual physiological state and improving the accuracy of clinical diagnosis (such as detecting exercise-induced pulmonary function abnormalities that are not apparent at rest).

[0196] The ECG module is electrically connected to the controller 380. The ECG data it collects can be stored and displayed synchronously with the pulmonary function data (such as displaying ECG waveforms and airflow velocity curves on the same time axis), which facilitates medical staff to analyze the temporal correlation of changes in cardiopulmonary function (such as whether ECG abnormalities occur synchronously with increased airway resistance) and improves the efficiency of result interpretation.

[0197] The ECG module includes at least ECG electrode pads (3-lead or 12-lead, made of silver / silver chloride) and a signal acquisition box (with built-in amplifier and filter). The ECG electrode pads are connected to the signal acquisition box via wires, and the signal acquisition box is electrically connected to the controller 380 via a USB interface. Before the test, the ECG electrode pads are attached to the designated position on the subject's chest. The subject can perform a breathing test while in motion (such as walking or jogging, which can be used in conjunction with an exercise treadmill). The ECG module acquires the ECG signal, which is amplified and filtered by the signal acquisition box and then transmitted to the controller 380. The controller 380 synchronously displays and stores the ECG data and pulmonary function test data (such as airway resistance and gas concentration) to achieve a comprehensive assessment of cardiopulmonary function.

[0198] Optionally, the trolley is equipped with wheels 330 at its bottom, each wheel having a braking mechanism for moving and fixing the trolley. Each of the four corners of the trolley body 320 has a wheel 330 made of polyurethane (which is quiet and wear-resistant), and each wheel 330 is equipped with a braking mechanism (such as a foot-operated brake pad; when pressed, the brake pad engages with the wheel rim to fix the trolley and prevent displacement during testing). This allows the trolley to be pushed to a designated position and fixed in place according to the testing scenario requirements.

[0199] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims, and the foregoing embodiments should be considered exemplary and non-limiting.

Claims

1. A lung function testing system, characterized in that, include: The trolley is used to carry the various functional modules of the testing system; The ventilation module includes a valve body and a valve core. The valve core switches the connection and disconnection with the valve body channel through an action to form different ventilation paths. The airway resistance module is configured to detect airway resistance parameters during breathing. The digital handpiece includes a flow tube with a total pressure channel, a static pressure channel and a sampling channel. The digital handpiece is configured to be selectively installed on a ventilation module or an airway resistance module. During a breathing test, the breathing pressure is obtained through the total pressure channel and the static pressure channel, and the corresponding gas sample is collected through the sampling channel. The ventilation module is mounted on the trolley via the first robotic arm, the airway resistance module is mounted on the trolley via the second robotic arm, and the digital handle is detachably connected to the trolley, the ventilation module, or the airway resistance module.

2. The lung function testing system according to claim 1, characterized in that, The first and / or second robotic arms have multiple degrees of freedom, which can be used to adjust the spatial position of the ventilation module and the airway resistance module to suit different subjects.

3. The lung function testing system according to claim 1, characterized in that, The airway resistance module includes: The T-shaped tube has a first connecting tube and a second connecting tube that are interconnected, and the end of the first connecting tube away from the second connecting tube is connected to the flow tube of the digital handle; A terminal resistance device is located at the end of the second connecting pipe away from the first connecting pipe; An oscillator is located on the side of the first connecting tube away from the digital handle and is connected to the airflow channel of the first connecting tube. The oscillator is configured to superimpose a pulse signal onto the subject's respiratory airflow.

4. The lung function testing system according to claim 1, characterized in that, Also includes: The gas analysis module is connected to the sampling channel of the digital handheld device via a pipeline, and is used to detect and analyze the components of the collected gas samples. The gas analysis module is located inside the trolley.

5. The lung function testing system according to claim 1, characterized in that, Also includes: The exercise flow meter, which can be detachably connected to the ventilation module or airway resistance module, is used to perform routine pulmonary function tests.

6. The lung function testing system according to claim 1, characterized in that, Also includes: The electrocardiogram (ECG) module, located on the trolley, is used to detect changes in the subject's ECG during exercise, in order to achieve a comprehensive assessment and testing of the human cardiopulmonary function.

7. The lung function testing system according to any one of claims 1 to 6, characterized in that, It also includes an electrically connected display module and controller, both of which are located on the trolley. The controller is configured to establish a signal connection with the functional modules of the detection system, and the display module is used to display the working parameters and detection data of each functional module.

8. The lung function testing system according to claim 1, characterized in that, The trolleys include: The vehicle body encloses a mounting cavity for installing the functional components of the detection system; the mounting cavity is divided into layers, each with a door panel with an independent switch to store different types of items. The first and second robotic arms are fixed to the vehicle body via detachable connection structures.

9. The lung function testing system according to claim 8, characterized in that, The side wall of the vehicle body has multiple electrical interfaces, each of which is electrically connected to the controller. These interfaces are used to enable the expansion connection of external devices.

10. The lung function testing system according to claim 1, characterized in that, The trolley is equipped with wheels at the bottom, and the wheels are equipped with a braking mechanism to enable the trolley to move and be fixed.

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