Airway detection device

Abstract

The invention discloses an airway detection device, which comprises a sensor outer cover, a sensor inner cover and a sensor outer cover, wherein the sensor outer cover comprises a front airway; the air filtering cotton is arranged at the air inlet end of the front air channel and used for filtering air moisture and particle impurities; the sensor assembly is arranged at the gas outlet end of the front gas channel and used for detecting gas concentration and components; the sealing foam is arranged between the sensor outer cover and the sensor assembly in a filling manner and is used for enabling gas to enter the sensor assembly to prevent side leakage; the fan assembly comprises a rear air channel and is used for regulating and controlling the gas flow during preheating and working of the sensor assembly according to the gas concentration and sensitivity; the metal hose comprises a middle air passage and is used for adjusting a measurable range and a measurement angle; wherein the front air passage, the middle air passage and the rear air passage are sequentially communicated to form a detection air passage. The device can be flexibly bent to adjust the measurable range and the measurement angle, and the gas filtering cotton is adopted to filter out air moisture and particulate impurities, so that the impact influence on the sensor during sampling is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to an airway detection device. Background Art

[0002] Portable gas detector is a portable gas detection tool, which is mainly used to detect the type and concentration of gas in the environment. This instrument uses gas sensors to detect the composition and content of the target gas, and has a wide range of application scenarios, such as industrial safety, environmental monitoring, emergency rescue and other fields. Portable gas detectors are of great significance to ensure industrial production safety, environmental protection and public safety.

[0003] The working principle of portable gas detectors mainly relies on different technologies and sensors to detect different gases. The working principles of portable gas detectors are diverse, including natural diffusion collection, multiple sensor technologies, optical principles, laser technology and PID sensor technology, etc. These technologies together ensure that the instrument can accurately and efficiently detect various gases.

[0004] Commonly used portable gas detectors can be divided into diffusion type gas detectors and pump suction type gas detectors according to their air intake methods. Their specific application scenarios are as follows:

[0005] (1) Diffusion gas detectors are suitable for open occasions, such as open workshops. They can be worn on the body and continuously, in real time, and accurately display the concentration of toxic and harmful gases on site. This instrument can be installed on workers so that they can understand the gas concentration in the surrounding environment at any time to ensure safety. Diffusion gas detectors are also equipped with vibration alarm accessories to avoid not being able to hear the sound alarm in a noisy environment, and are equipped with computer chips to record data and provide specific guidance for workers' health and safety.

[0006] (2) Pump-type gas detectors are suitable for entering confined spaces for testing, such as reaction tanks, storage tanks, sewers or other underground pipelines. Before personnel enter these spaces, they must be tested to ensure safety. Pump-type gas detectors can actively extract samples for testing through the action of a pump, which improves the efficiency and accuracy of testing.

[0007] At present, most of the pump-suction gas detectors on the market use the traditional air pump motor combined with a metal hard tube to perform gas sampling. The disadvantages of this method are poor measurement stability, complex structure, large size, heavy mass, high power consumption, high noise, high cost, short life, no gas filtering device, the probe cannot be bent and cannot be used flexibly, and it is impossible to achieve special requirements such as small flow or fine sampling. Moreover, this method has a great impact on the impact of sensor sampling, and is prone to defects such as erroneous sampling that leads to false alarms of the detector. Summary of the invention

[0008] In order to overcome the above technical problems, the present invention discloses an airway detection device.

[0009] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0010] An airway detection device, the device being electrically connected to a leak detector;

[0011] The device comprises:

[0012] a sensor housing including a front airway;

[0013] Gas filter sponge, which is arranged at the air inlet end of the front airway and is used to filter out air moisture and particulate impurities;

[0014] A sensor assembly, which is arranged at the gas outlet end of the front airway and is used to detect gas concentration and composition;

[0015] Sealing foam, which is filled and arranged between the sensor cover and the sensor assembly, and is used to allow gas to enter the sensor assembly and prevent side leakage;

[0016] A fan assembly including a rear air passage for regulating the gas flow rate during preheating and operation of the sensor assembly according to gas concentration and sensitivity;

[0017] A metal hose, which includes a middle air passage and is connected to the sensor housing and the fan assembly, and is used to adjust the measurable range and the measuring angle;

[0018] Wherein, the front airway, the middle airway and the rear airway are connected in sequence to form a detection airway.

[0019] The above-mentioned airway detection device, wherein the sensor cover includes an air inlet cover and an air outlet cover that are integrally formed, and the cross-sectional diameter of the sensor cover gradually increases from the air inlet cover to the air outlet cover, and the front airway passes through the center of the sensor cover and connects the air inlet cover and the air outlet cover;

[0020] A filter sponge installation groove is arranged on the air intake cover around the front air passage, and the gas filter sponge is arranged in the filter sponge installation groove;

[0021] A foam installation groove is arranged on the air outlet cover part around the front air passage, and the sealing foam is installed in the foam installation groove and abuts against the sensor component.

[0022] The above-mentioned airway detection device, wherein the sensor assembly includes a sensor, a sensor plate and a sensor seat, and the sensor is arranged corresponding to the front airway;

[0023] The sensor is electrically connected to the sensor plate and is installed in the metal hose through the sensor seat.

[0024] The above-mentioned airway detection device, wherein the sensor board includes a circuit board and an end pin positioning seat, the end pin positioning seat is provided with a plurality of end pin fixing grooves for fixing the sensor end pins, the end pins of the sensor are installed in the end pin fixing grooves and are electrically connected to the circuit board;

[0025] The circuit board is electrically connected with a warning light.

[0026] The above-mentioned airway detection device, wherein the sensor seat comprises an integrally formed seat body, and a first mounting edge and a second mounting edge respectively extending from two ends of the seat body;

[0027] A first mounting groove for positioning the sensor is formed between the first mounting edge and the seat body, and a foolproof positioning groove for foolproofly fixing the sensor is provided in the first mounting groove;

[0028] A second mounting groove for positioning the end foot positioning seat is formed between the second mounting periphery and the seat body;

[0029] A plurality of groups of end pin avoidance through holes for inserting the end pins of the sensor are arranged through the seat body, and the end pin avoidance through holes are arranged corresponding to the end pin fixing grooves.

[0030] The above-mentioned airway detection device, wherein a plurality of groups of abutting and stabilizing protrusions and a plurality of groups of locking buckles are extended and arranged on the second installation edge, and the abutting and stabilizing protrusions and the locking buckles are arranged alternately;

[0031] A plurality of locking through holes are arranged through the circuit board;

[0032] The abutting and stabilizing protrusion abuts against the circuit board, and the locking buckle and the locking through hole are detachably arranged.

[0033] The above-mentioned airway detection device, wherein the metal hose comprises a hose body, and a first butt end and a second butt end arranged at both ends of the hose body;

[0034] The first docking end comprises a first receiving groove for receiving the sensor assembly, and a first locking thread structure is arranged around the first receiving groove;

[0035] The second docking end comprises a first docking seat, the first docking seat is provided with a fixing annular protrusion for fixing the fan assembly, and a stop annular protrusion for limiting the docking assembly position is provided between the first docking seat and the hose body.

[0036] The above-mentioned detection airway device, wherein the fan assembly comprises a fan cover, a fan and a fan airtight pad, an airflow adjustment cavity is formed between the fan cover and the fan airtight pad, and the fan is arranged in the airflow adjustment cavity;

[0037] The fan cover comprises a second docking seat, the second docking seat is provided with a fastening annular groove corresponding to the fastening annular protrusion, the first docking seat is inserted into the second docking seat, and the fastening annular protrusion is fastened in the fastening annular groove to achieve docking assembly;

[0038] A waterproof ring is arranged between the fixing annular protrusion and the fixing annular groove.

[0039] The above-mentioned airway detection device, wherein the device further comprises an annular light guide ring, wherein the annular light guide ring comprises an integrally formed light guide end, and a third butt end and a fourth butt end arranged at both ends of the light guide end;

[0040] A second receiving groove for receiving the sensor assembly is provided through the light guide end, and the light guide end is provided corresponding to the warning light;

[0041] The third docking end includes a mounting boss, and the air outlet cover portion is adaptively provided with a mounting groove corresponding to the mounting boss;

[0042] The fourth butt end includes a second locking thread structure adapted to match the first locking thread structure.

[0043] The above-mentioned airway detection device, wherein the device further comprises an MCU processor, and the MCU processor is electrically connected to the fan and the warning light respectively;

[0044] The MCU processor controls the warning light in a single line via the MW1838EA protocol.

[0045] The beneficial effects of the present invention are as follows: the detection airway device of the present invention innovatively cooperates with the metal hose and fan assembly for gas sampling, realizes bending at any angle to adjust the measurable range and measurement angle, and is provided with a gas filter sponge at the front end of the detection airway to effectively filter out air moisture and particulate impurities, reduce the impact on the sensor during sampling, avoid problems such as erroneous sampling leading to false alarms of the detector, extend the service life of the sensor, achieve the advantages of low noise and low power consumption, and is suitable for special sampling requirements such as small flow or fine sampling. Secondly, the sealing foam sponge is used to allow the gas to be tested to enter the sensor assembly to prevent side leakage, effectively improving the detection sensitivity and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0047] Figure 1 It is a schematic diagram of the structure of the present invention;

[0048] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0049] Figure 3 It is an explosion schematic diagram of the present invention;

[0050] Figure 4 It is a three-dimensional schematic diagram of the sensor seat in the present invention;

[0051] Figure 5 is a three-dimensional schematic diagram of a sensor plate in the present invention;

[0052] Figure 6 It is a three-dimensional schematic diagram of the metal hose in the present invention. DETAILED DESCRIPTION

[0053] The present invention is further described below by means of specific embodiments to make the technical solution of the present invention easier to understand and grasp, rather than to limit the present invention.

[0054] Example: See Figures 1 to 6 , this embodiment provides an airway detection device, the device is electrically connected to a leak detector;

[0055] The device comprises:

[0056] A sensor housing 1 including a front airway;

[0057] Gas filter sponge 2, which is arranged at the air inlet end of the front airway and is used to filter out air moisture and particulate impurities;

[0058] A sensor assembly 3, which is arranged at the gas outlet end of the front airway and is used to detect gas concentration and composition;

[0059] A sealing foam 4 is filled and arranged between the sensor cover 1 and the sensor assembly 3 to prevent gas from entering the sensor assembly 3 and preventing side leakage;

[0060] A fan assembly 5, comprising a rear air passage, for regulating the gas flow rate of the sensor assembly 3 during preheating and operation according to gas concentration and sensitivity;

[0061] A metal hose 6, which includes a middle air passage and is connected to the sensor housing 1 and the fan assembly 5, and is used to adjust the measurable range and the measuring angle;

[0062] Wherein, the front airway, the middle airway and the rear airway are connected in sequence to form a detection airway.

[0063] Specifically, the metal hose 6 and the fan assembly 5 are innovatively used in combination for gas sampling, and can be bent at any angle to adjust the measurable range and the measuring angle. A gas filter sponge 2 is provided at the front end of the detection airway to effectively filter out moisture and particulate impurities in the air, reduce the impact on the sensor 31 during sampling, avoid problems such as erroneous sampling leading to false alarms of the detector, extend the service life of the sensor 31, achieve the advantages of low noise and low power consumption, and be suitable for special sampling requirements such as small flow or fine sampling. Secondly, the sealing foam sponge 4 is used to allow the gas to be measured to enter the sensor assembly 3 to prevent leakage, thereby effectively improving the detection sensitivity and reliability.

[0064] Preferably, the sensor cover 1 includes an air inlet cover and an air outlet cover that are integrally formed, and the cross-sectional diameter of the sensor cover 1 gradually increases from the air inlet cover to the air outlet cover, and the front air duct runs through the center of the sensor cover 1 and connects the air inlet cover and the air outlet cover;

[0065] A filter sponge installation groove is arranged on the air intake cover around the front air passage, and the gas filter sponge 2 is arranged in the filter sponge installation groove;

[0066] A foam installation groove is provided in the air outlet cover portion around the front air passage, and the sealing foam 4 is installed in the foam installation groove and abuts against the sensor assembly 3 .

[0067] Specifically, the sensor cover 1 is used to form the sealed front airway and protect the sensor assembly 3 and the sealing foam 4 to improve the stability and reliability of gas detection;

[0068] The sensor cover 1 is made of ABS plastic (or other types of plastic) or metal material, and its surface is processed by electroplating, electrophoresis or spraying.

[0069] Specifically, the gas filter sponge 2 is made of sponge material (including polyurethane, polyether, polyvinyl alcohol, polyester and other materials), but is not limited to sponge. It can also be a waterproof breathable membrane (the main component is tetrafluoroethylene polymer) and other materials to filter out air moisture and particulate impurities to protect the sensor 31 from damage or failure and extend the life of the sensor 31.

[0070] Specifically, the sealing foam 4 is made of foam material, including polyethylene foam, polyester foam, rubber foam, etc., and is used to allow gas to enter the interior of the sensor component 3 and prevent gas leakage from bypassing, thereby causing a decrease in detection sensitivity or detection failure.

[0071] Preferably, the sensor assembly 3 includes a sensor 31, a sensor plate 32 and a sensor seat 33, and the sensor 31 is arranged corresponding to the front airway;

[0072] The sensor 31 is electrically connected to the sensor plate 32 and is installed in the metal hose 6 through the sensor seat 33; specifically, the sensor 31 can be selected according to the corresponding type and type for application according to different gas detection needs. The sensor 31 is used to detect gas concentration and composition. The goal is to convert gas information into electrical signals or other forms of information output to meet the requirements of information transmission, processing, storage, display, recording and control.

[0073] Preferably, the sensor board 32 includes a circuit board 321 and an end foot positioning seat 322, wherein the end foot positioning seat 322 is provided with a plurality of end foot fixing grooves for fixing the end feet of the sensor 31, and the end feet of the sensor 31 are installed in the end foot fixing grooves and are electrically connected to the circuit board 321;

[0074] The circuit board 321 is electrically connected to a warning light 323 .

[0075] Specifically, the sensor board 32 is made of FR-4 or other types of circuit board 321 materials, and is used to provide electrical connection for the sensor 31 and fix the sensor seat 33;

[0076] The warning light 323 is a color warning colorful light, model SMD / 1615 / RGB (full color), but not limited to this model, and is used to display three warning colors of red, orange and yellow according to the detected gas concentration to warn the user.

[0077] Preferably, the sensor seat 33 includes an integrally formed seat body 331, and a first mounting edge 332 and a second mounting edge 333 extending from two ends of the seat body 331, respectively.

[0078] A first mounting groove for positioning the sensor 31 is formed between the first mounting edge 332 and the seat body 331 , and a foolproof positioning groove 334 for foolproofly fixing the sensor 31 is provided in the first mounting groove;

[0079] A second mounting groove for positioning the end foot positioning seat 322 is formed between the second mounting edge 333 and the seat body 331;

[0080] A plurality of groups of end pin avoidance through holes 335 for inserting the end pins of the sensor 31 are arranged through the seat body 331 , and the end pin avoidance through holes 335 are arranged corresponding to the end pin fixing grooves.

[0081] Specifically, the sensor seat 33 is made of ABS plastic, and other types of plastics may also be used, with no limitation on material type or color, and is used to fix the sensor 31 and prevent the sensor 31 from being inserted in reverse, causing malfunctions.

[0082] Preferably, a plurality of groups of abutting and stabilizing protrusions 336 and a plurality of groups of locking buckles 337 are extended from the second mounting edge 333, and the abutting and stabilizing protrusions 336 and the locking buckles 337 are alternately arranged, so as to effectively improve the assembly stability of the circuit board 321 and the sensor seat 33;

[0083] A plurality of locking through holes 324 are provided through the circuit board 321;

[0084] The abutting and stabilizing protrusion 336 abuts against the circuit board 321 , and the locking buckle 337 and the locking through hole 324 are detachably arranged, so as to improve the convenience of assembling the circuit board 321 and the sensor seat 33 .

[0085] Specifically, when the sensor 31 is assembled in the first mounting groove and the circuit board 321 is assembled on the second mounting groove, the end foot of the sensor 31 is fixed in the end foot fixing groove through the end foot avoidance through hole 335, the abutting and stabilizing protrusion 336 abuts against the circuit board 321, and the locking buckle 337 is locked in the locking through hole 324 to complete the assembly operation of the sensor component 3.

[0086] Preferably, the metal hose 6 includes a hose body 61, and a first butt end 62 and a second butt end 63 disposed at both ends of the hose body 61;

[0087] The first docking end 62 includes a first receiving groove for receiving the sensor assembly 3, and a first locking thread structure is arranged around the first receiving groove;

[0088] The second docking end 63 includes a first docking seat, the first docking seat is provided with a fixing annular protrusion 64 for fixing the fan assembly 5, and a stop annular protrusion 65 for limiting the docking assembly position is provided between the first docking seat and the hose body 61.

[0089] Specifically, the metal hose 6 is used to support the sensor 31, extend the measurable range and adjust the measuring angle of the sensor 31, wherein the hose body 61 is wrapped with a steel wire spring and a stainless steel outer layer, and the outermost layer is made of insulating materials such as thermoplastic tubes, and the first docking end 62 and the second docking end 63 are both made of aluminum alloy or copper alloy.

[0090] Preferably, the fan assembly 5 comprises a fan cover 51, a fan 52 and a fan airtight pad 53, an airflow regulating cavity is formed between the fan cover 51 and the fan airtight pad 53, and the fan 52 is disposed in the airflow regulating cavity;

[0091] The fan cover 51 includes a second docking seat, the second docking seat is provided with a fastening annular groove corresponding to the fastening annular protrusion 64, the first docking seat is inserted into the second docking seat, and the fastening annular protrusion 64 is fastened in the fastening annular groove to achieve docking assembly;

[0092] A waterproof ring 54 is provided between the fixing annular protrusion 64 and the fixing annular groove.

[0093] Specifically, the fan cover 51 is made of ABS plastic, and can also be made of other types of plastic or metal, and the material type is not limited, and is used to fix the fan 52 and form the airflow adjustment cavity with negative pressure with the fan 52;

[0094] The fan 52 is not limited to the axial flow fan 52, and may also be other types of fans 52 (such as centrifugal fans 52, ion fans 52 and other blower fans 52). The fan 52 is a core component of the airway system, and its function is to generate a flow-controllable negative pressure on the detection airway, provide a power source for the inhalation of the gas, and adjust and control the preheating of the sensor 31 and the gas flow during operation according to the gas concentration and sensitivity.

[0095] The fan airtight pad 53 is made of silicone rubber, but is not limited to silicone rubber, and is used to seal the periphery of the fan 52 so that the fan 52 generates sufficient negative pressure to supply the detection airway.

[0096] Preferably, the device further comprises an annular light guide ring 7, wherein the annular light guide ring 7 comprises an integrally formed light guide end, and a third butt end and a fourth butt end arranged at both ends of the light guide end;

[0097] A second receiving groove for receiving the sensor assembly 3 is provided through the light guide end, and the light guide end is provided corresponding to the warning light 323;

[0098] The third docking end includes a mounting boss, and the air outlet cover portion is adaptively provided with a mounting groove corresponding to the mounting boss;

[0099] The fourth butt end includes a second locking thread structure adapted to match the first locking thread structure.

[0100] Specifically, the annular light guide ring 7 is made of frosted PC plastic material, but is not limited to this material, and can also be made of other materials such as organic glass material, and is used to transmit the warning color of the warning light 323 to warn the user.

[0101] Preferably, the device further comprises an MCU processor, and the MCU processor is electrically connected to the fan 52 and the warning light 323 respectively; specifically, the MCU processor controls the rotation speed of the fan 52 through pulse width modulation (PWM), and repeatedly adjusts to the most ideal rotation speed (air flow and flow rate) according to the concentration of the detected gas and the sensitivity characteristics of the sensor 31; during the gas detection process, the detected gas enters the detection airway, and the sensor 31 converts it into an electrical signal after detection, which is displayed and alarmed after being processed by the MCU processor;

[0102] The MCU processor controls the warning light 323 via a single line of the MW1838EA protocol.

[0103] The control method of the airway detection device of the present invention comprises the following steps:

[0104] Step 1, adjusting the angle and position of the metal hose 6 according to the emission position of the gas to be tested, so that the air inlet end of the front airway enters the gas to be tested;

[0105] Step 2, the leak detector is powered on, the sensor 31 is turned on and enters a 60s preheating procedure; wherein, in order to allow the sensor 31 to preheat quickly and fully, the MCU processor does not start the fan 52 in the first 30s, and when the preheating time reaches 30s, the MCU processor starts the fan 52, at which time the speed of the fan 52 is controlled by the MCU processor through pulse width modulation (PWM) to repeatedly adjust to the most ideal speed according to the concentration of the gas to be detected and the sensitivity characteristics of the sensor 31;

[0106] Step 3, when the preheating time reaches 30 seconds, the MCU processor starts the fan 52, and due to the negative pressure, the gas to be measured is filtered by the gas filter sponge 2 and flows into the front airway of the sensor housing 1;

[0107] Step 4, the filtered gas to be tested enters the sensor assembly 3 along the front airway, and at this time the sealing foam 4 effectively prevents the gas from leaking through the bypass;

[0108] Step 5, the gas flowing through the sensor assembly 3 flows along the middle air passage of the metal hose 6 into the fan assembly 5 and is discharged;

[0109] Step 6, after the 60-second preheating operation is completed, the leak detector enters the standby detection state. At this time, the gas to be tested enters the detection airway again, and the sensor component 3 detects the concentration and composition of the gas and converts it into an electrical signal. After being processed by the MCU processor, it is displayed and an alarm is sounded. The warning color of the warning light 323 is transmitted and emitted by the annular light guide ring 7.

[0110] The airway detection device of the present invention and the traditional pump suction device were tested for sensitivity, noise, power consumption, service life parameters and cost. The detailed test results are shown in Table 1:

[0111] Table 1 Comparison test results

[0112]

[0113]

[0114] The detection airway device of the present invention innovatively cooperates with the metal hose and fan assembly to perform gas sampling, realizes bending at any angle to adjust the measurable range and measurement angle, and is provided with a gas filter sponge at the front end of the detection airway to effectively filter out air moisture and particulate impurities, reduce the impact on the sensor during sampling, avoid problems such as erroneous sampling leading to false alarms of the detector, extend the service life of the sensor, achieve the advantages of low noise and low power consumption, and is suitable for special sampling requirements such as small flow or fine sampling. Secondly, the sealing foam sponge is used to allow the gas to be tested to enter the sensor assembly to prevent leakage, effectively improving the detection sensitivity and reliability.

[0115] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present invention by using the technical means and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be covered by the protection scope of the present invention.

Claims

1. An airway detection device, characterized in that: The device is electrically connected to the leak detector; The device comprises: a sensor housing including a front airway; Gas filter sponge, which is arranged at the air inlet end of the front airway and is used to filter out air moisture and particulate impurities; A sensor assembly, which is arranged at the gas outlet end of the front airway and is used to detect gas concentration and composition; Sealing foam, which is filled and arranged between the sensor cover and the sensor assembly, and is used to allow gas to enter the sensor assembly and prevent side leakage; A fan assembly including a rear air passage for regulating the gas flow rate during preheating and operation of the sensor assembly according to gas concentration and sensitivity; A metal hose, which includes a middle air passage and is connected to the sensor housing and the fan assembly, and is used to adjust the measurable range and the measuring angle; Wherein, the front airway, the middle airway and the rear airway are connected in sequence to form a detection airway.

2. The airway detection device according to claim 1, characterized in that: The sensor cover includes an air inlet cover and an air outlet cover which are integrally formed, and the cross-sectional diameter of the sensor cover gradually increases from the air inlet cover to the air outlet cover, and the front air passage passes through the center of the sensor cover and communicates with the air inlet cover and the air outlet cover; A filter sponge installation groove is arranged on the air intake cover around the front air passage, and the gas filter sponge is arranged in the filter sponge installation groove; A foam installation groove is arranged on the air outlet cover part around the front air passage, and the sealing foam is installed in the foam installation groove and abuts against the sensor component.

3. The airway detection device according to claim 2, characterized in that: The sensor assembly includes a sensor, a sensor plate and a sensor seat, and the sensor is arranged corresponding to the front airway; The sensor is electrically connected to the sensor plate and is installed in the metal hose through the sensor seat.

4. The airway detection device according to claim 3, characterized in that: The sensor board includes a circuit board and an end pin positioning seat, wherein the end pin positioning seat is provided with a plurality of end pin fixing grooves for fixing the end pins of the sensor, and the end pins of the sensor are installed in the end pin fixing grooves and are electrically connected to the circuit board; The circuit board is electrically connected with a warning light.

5. The airway detection device according to claim 4, characterized in that: The sensor seat comprises an integrally formed seat body, and a first mounting edge and a second mounting edge respectively extending from two ends of the seat body; A first mounting groove for positioning the sensor is formed between the first mounting edge and the seat body, and a foolproof positioning groove for foolproofly fixing the sensor is provided in the first mounting groove; A second mounting groove for positioning the end foot positioning seat is formed between the second mounting periphery and the seat body; A plurality of groups of end pin avoidance through holes for inserting the end pins of the sensor are arranged through the seat body, and the end pin avoidance through holes are arranged corresponding to the end pin fixing grooves.

6. The airway detection device according to claim 5, characterized in that: A plurality of groups of abutting and stabilizing protrusions and a plurality of groups of locking buckles are extended and arranged on the second installation edge, and the abutting and stabilizing protrusions and the locking buckles are arranged alternately; A plurality of locking through holes are arranged through the circuit board; The abutting and stabilizing protrusion abuts against the circuit board, and the locking buckle and the locking through hole are detachably arranged.

7. The airway detection device according to claim 6, characterized in that: The metal hose comprises a hose body, and a first butt end and a second butt end arranged at both ends of the hose body; The first docking end comprises a first receiving groove for receiving the sensor assembly, and a first locking thread structure is arranged around the first receiving groove; The second docking end comprises a first docking seat, the first docking seat is provided with a fixing annular protrusion for fixing the fan assembly, and a stop annular protrusion for limiting the docking assembly position is provided between the first docking seat and the hose body.

8. The airway detection device according to claim 7, characterized in that: The fan assembly comprises a fan cover, a fan and a fan airtight pad, an airflow regulating cavity is formed between the fan cover and the fan airtight pad, and the fan is arranged in the airflow regulating cavity; The fan cover comprises a second docking seat, the second docking seat is provided with a fastening annular groove corresponding to the fastening annular protrusion, the first docking seat is inserted into the second docking seat, and the fastening annular protrusion is fastened in the fastening annular groove to achieve docking assembly; A waterproof ring is arranged between the fixing annular protrusion and the fixing annular groove.

9. The airway detection device according to claim 8, characterized in that: The device further comprises an annular light guide ring, wherein the annular light guide ring comprises an integrally formed light guide end, and a third butt joint end and a fourth butt joint end arranged at two ends of the light guide end; A second receiving groove for receiving the sensor assembly is provided through the light guide end, and the light guide end is provided corresponding to the warning light; The third docking end includes a mounting boss, and the air outlet cover portion is adaptively provided with a mounting groove corresponding to the mounting boss; The fourth butt end includes a second locking thread structure adapted to match the first locking thread structure.

10. The airway detection device according to claim 9, characterized in that: The device further comprises an MCU processor, and the MCU processor is electrically connected to the fan and the warning light respectively; The MCU processor controls the warning light in a single line via the MW1838EA protocol.

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