A nitric oxide breath analyser

Abstract

The application belongs to the technical field of medical apparatuses, and discloses a nitric oxide breath analyzer, which comprises a front shell, a rear shell assembly and a gas conveying assembly. The front shell has display and human-computer interaction functions. The rear shell assembly comprises a rear shell and a detection structure arranged on the rear shell and used for detecting the content of nitric oxide. The rear shell is arranged on the front shell and forms an installation cavity together with the front shell. The gas conveying assembly is arranged in the installation cavity. The gas conveying assembly can adjust the flow of the detected gas and is arranged in communication with the detection structure, so that the detected gas enters the detection structure through the gas conveying assembly, thereby realizing the modular design of the nitric oxide breath analyzer. Different functional components are located at different positions, thereby reducing the assembly difficulty of the nitric oxide breath analyzer, reducing the assembly cost of the nitric oxide breath analyzer, and further reducing the production cost of the nitric oxide breath analyzer.

Description

Technical Field

[0001] This application belongs to the technical field of medical devices, specifically relating to a nitric oxide breath analyzer. Background Technology

[0002] With the development of medical technology, nitric oxide breath analyzers are increasingly used in the detection of respiratory inflammation. They can reflect the inflammation status of different parts of the patient by detecting parameters such as FeNO50, FeNO200, CaNO, and FnNO. The FeNO50 parameter can reflect the inflammation status of the large airways, the FeNO200 parameter can reflect the inflammation status of the small airways, the CaNO parameter can reflect the inflammation status of the alveoli, and the FnNO parameter can reflect the inflammation status of the upper airways, mainly the nasal cavity and sinuses.

[0003] When measuring the parameters of FeNO50, sampling is required at an oral-exhalation flow rate of 50 mL / s; when measuring the parameters of FeNO200, sampling is required at an oral-exhalation flow rate of 200 mL / s; and the parameters of CaNO are obtained by calculation after detecting FeNO50 and FeNO200. When measuring FnNO, sampling is required by drawing air from one nostril at a constant flow rate of 10 mL / s. Therefore, different parameters require different sampling flow rates and sampling methods for measurement.

[0004] Currently, nitric oxide breath analyzers typically consist of a housing and electronic components housed within it. Due to the large number of electronic components and the fact that their distribution within the housing is limited by its shape, different functional electronic components are often arranged in an interwoven manner. This increases the assembly difficulty and cost of the nitric oxide breath analyzer, as well as the maintenance difficulty and cost. Utility Model Content

[0005] This application provides a nitric oxide breath analyzer to reduce the assembly cost and maintenance cost of the nitric oxide breath analyzer.

[0006] The technical solution adopted in this application is as follows:

[0007] A nitric oxide breath analyzer includes:

[0008] The front housing has display and human-computer interaction functions;

[0009] A rear housing assembly, the rear housing assembly including a rear housing and a detection structure disposed on the rear housing for detecting nitric oxide content, the rear housing being disposed on the front housing and forming a mounting cavity together with the front housing;

[0010] A gas delivery assembly is disposed within the mounting cavity. The gas delivery assembly is capable of adjusting the flow rate of the gas to be detected and is connected to the detection structure so that the gas to be detected enters the detection structure via the gas delivery assembly.

[0011] By adopting the above technical solution, when using the nitric oxide breath analyzer of this application, the gas to be tested enters the gas delivery assembly so that the gas delivery assembly adjusts the flow rate of the gas to be tested. The gas to be tested after the flow rate is adjusted enters the detection structure, and then the detection structure detects the nitric oxide content in the gas to be tested, thereby judging the patient's respiratory inflammation based on the nitric oxide content in the gas to be tested.

[0012] Because the detection structure in this application is located in the rear housing, and the gas delivery assembly is located in the mounting cavity formed by the rear and front housings, a modular design of the nitric oxide breath analyzer is achieved. This allows components with different functions to be located in different positions, avoiding the situation where components with different functions are arranged in an overlapping manner inside the nitric oxide breath analyzer. This reduces the assembly difficulty of the nitric oxide breath analyzer, thereby reducing the assembly cost and production cost. At the same time, it reduces the maintenance difficulty of the nitric oxide breath analyzer, achieving the effect of facilitating maintenance and reducing maintenance costs.

[0013] Optionally, the gas delivery assembly includes a flow detector, a first on / off valve connected to the flow detector, a flow stabilizer connected to the flow detector, a second on / off valve connected to the flow stabilizer, a gas storage chamber connected to the second on / off valve, and a third on / off valve connected to the gas storage chamber. Both the first on / off valve and the third on / off valve are capable of communicating with the outside.

[0014] By adopting the above technical solution, when collecting the gas to be detected at a flow rate of 200 mL / s, the first on-off valve, the second on-off valve, and the third on-off valve are all in the open state, so that the gas to be detected can enter the flow detector at a flow rate of 200 mL / s. Then, the flow detector detects the flow rate of the gas to be detected. Then, part of the gas to be detected after flowing through the flow detector is discharged to the outside through the first on-off valve, and the remaining part of the gas to be detected enters the gas storage chamber through the flow stabilizer and the second on-off valve. As the gas to be detected continues to enter the gas storage chamber, the gas originally in the gas storage chamber is discharged to the outside through the third on-off valve. When the gas to be detected is collected, the first on-off valve, the second on-off valve, and the third on-off valve are closed, so that the gas to be detected is stored in the gas storage chamber, thus completing the collection of the gas to be detected at a flow rate of 200 mL / s.

[0015] When collecting gas samples at a flow rate of 50 mL / s, the first on / off valve is closed, while the second and third on / off valves are open. This allows the gas to enter the flow detector at a flow rate of 50 mL / s, enabling the flow detector to detect the gas flow rate. After passing through the flow detector, the gas enters the storage chamber via the flow stabilizer and the second on / off valve. As the gas continues to enter the storage chamber, the existing gas in the storage chamber is discharged to the outside via the third on / off valve. Once the gas collection is complete, the second and third on / off valves are closed, allowing the gas to be stored in the storage chamber, thus completing the collection of gas samples at a flow rate of 50 mL / s.

[0016] Because the first on / off valve is open when collecting the gas being tested at a flow rate of 200 mL / s, the patient's expiratory resistance is reduced. This ensures that the patient can exhale the gas at a flow rate of 200 mL / s, improving the accuracy of FeNO200 parameter detection. This allows for accurate assessment of the patient's small airway inflammation using a nitric oxide breath analyzer. Furthermore, it improves the smoothness of the patient's exhalation, reducing the difficulty for the patient to exhale the gas at a flow rate of 200 mL / s, thus enhancing the patient's testing experience.

[0017] Furthermore, since the third shut-off valve is open when sampling the gas being tested at flow rates of 200 mL / s and 50 mL / s, residual gas in the pipeline and gas storage chamber can be expelled, thereby improving the sampling effect of the gas being tested at flow rates of 200 mL / s and 50 mL / s, and thus improving the detection accuracy of FeNO200 and FeNO50 parameters.

[0018] Optionally, the gas delivery assembly further includes a fourth on / off valve connected to the gas storage chamber, the fourth on / off valve being able to communicate with the outside.

[0019] By adopting the above technical solution, when the gas to be detected stored in the gas storage chamber enters the detection structure, the fourth shut-off valve is in the open state, thereby connecting the gas storage chamber to the outside through the fourth shut-off valve. This ensures the smooth flow of the gas to be detected in the gas storage chamber into the detection structure, while reducing the workload of the fluid pump that pumps the gas to be detected in the gas storage chamber. As a result, the nitric oxide breath analyzer can be equipped with a fluid pump with lower power, which reduces the manufacturing cost of the nitric oxide breath analyzer and reduces the noise generated by the nitric oxide breath analyzer during operation, thereby further improving the patient's testing experience.

[0020] Meanwhile, in this application, by opening the fourth shut-off valve when the gas to be detected in the gas storage chamber enters the detection structure, compared to the scheme that requires opening the first and second shut-off valves when the gas to be detected in the gas storage chamber enters the detection structure, the flow path of external gas entering the gas storage chamber is shortened, thereby reducing the resistance when the gas to be detected in the gas storage chamber enters the detection structure. This can also achieve the effect of reducing the workload of the fluid pump, and further enable the configuration of a lower power fluid pump for the nitric oxide breath analyzer.

[0021] Optionally, the gas delivery assembly further includes a base, which includes a bottom cover and a top cover disposed above the bottom cover. The bottom cover and the top cover are joined together to form the gas storage chamber. The flow detector, the first on / off valve, the flow stabilizer, the second on / off valve, the third on / off valve, and the fourth on / off valve are all disposed on the top cover.

[0022] By adopting the above technical solution, since the bottom cover and top cover are spliced ​​together to form a gas storage chamber, a gas storage chamber is formed inside the base. The flow detector, the first on / off valve, the flow stabilizer, the second on / off valve, the third on / off valve, and the fourth on / off valve are all located on the top cover, thereby integrating other components of the gas delivery assembly into the base. This increases the flexibility of the base and allows for easier assembly of the gas delivery assembly. Other components can be assembled into the base first, and then the gas delivery assembly can be installed into the mounting cavity, reducing the assembly difficulty and improving the assembly efficiency of the nitric oxide breath analyzer. Furthermore, during maintenance, the entire gas delivery assembly can be removed from the mounting cavity, reducing maintenance difficulty and improving maintenance efficiency.

[0023] Optionally, the detection structure includes a fifth on / off valve connected to the gas storage chamber, a fluid pump connected to the fifth on / off valve, and a detector connected to the fluid pump. The detector is capable of detecting the content of nitric oxide and is connected to the outside environment.

[0024] By adopting the above technical solution, when detecting FeNO50 or FeNO200 parameters, the fourth and fifth shut-off valves are opened and the fluid pump is started, so that the gas to be detected stored in the gas storage chamber enters the detector through the fifth shut-off valve and the fluid pump under the action of the fluid pump, thereby enabling the detection of FeNO50 or FeNO200 parameters of the gas to be detected in the detector. After the gas to be detected is detected, it is directly discharged from the detector.

[0025] When detecting FnNO parameters, the second and fifth shut-off valves are opened and the fluid pump is started, which creates negative pressure in the tubing inside the nitric oxide breath analyzer. This allows the gas from the patient's nasal cavity to enter the detector through the flow detector, flow stabilizer, second shut-off valve, gas storage chamber, fifth shut-off valve, and fluid pump, thereby enabling the detector to detect the FnNO parameters in the gas being tested.

[0026] Optionally, the detector includes a humidity and temperature detector in communication with the fluid pump and a nitric oxide detector in communication with the humidity and temperature detector.

[0027] By adopting the above technical solution, since the detector includes a humidity and temperature detector connected to the fluid pump and a nitric oxide detector connected to the humidity and temperature detector, the nitric oxide breath analyzer can correct the nitric oxide value according to temperature and humidity, thereby further improving the accuracy of nitric oxide detection and thus enabling a more accurate assessment of the patient's inflammation status.

[0028] Optionally, the rear housing has a receiving cavity on the side opposite to the front housing, and the nitric oxide detector is detachably connected to the receiving cavity.

[0029] By adopting the above technical solution, since the nitric oxide detector can be detachably connected to the accommodating cavity, it is possible to facilitate the replacement of the nitric oxide detector, thereby extending the service life of the nitric oxide breath analyzer and ensuring the detection accuracy of the nitric oxide breath analyzer, while also reducing the user's operating costs.

[0030] Optionally, the accommodating cavity is provided with fixing ribs, which are located on opposite sides of the nitric oxide detector to compress and fix the nitric oxide detector.

[0031] By adopting the above technical solution, the nitric oxide detector is fixed by the compression of the fixing rib in this application, which on the one hand ensures the stability of the nitric oxide detector and thus ensures the working stability of the nitric oxide breath analyzer, and on the other hand, facilitates the disassembly and assembly of the nitric oxide detector, thereby improving the user experience.

[0032] Optionally, the nitric oxide detector includes a housing, a detector body disposed inside the housing, a circuit board disposed inside the housing, and a battery disposed on the circuit board. The detector body is electrically connected to the circuit board, and the battery is electrically connected to the circuit board to provide power to the detector body. The housing is provided with a communication port communicating with the humidity and temperature detector, and a first sealing ring is provided at the communication port between the housing and the detector body.

[0033] By adopting the above technical solution, the nitric oxide detector has a battery, thus eliminating its reliance on an external power source. This allows the nitric oxide detector to still detect nitric oxide levels even without an external power source. Furthermore, the presence of a first sealing ring between the outer casing and the detector body at the connection point increases the seal between them, preventing external gas from entering the casing through the gap and preventing leakage of the detected gas from the casing through the same gap. This ensures the accuracy of nitric oxide detection and enables the accurate assessment of a patient's inflammation status using a nitric oxide breath analyzer.

[0034] Optionally, the humidity and temperature detector is provided with a second sealing ring, which is fitted over the outside of the housing.

[0035] By adopting the above technical solution, since the humidity and temperature detector is equipped with a second sealing ring located on the outside of the housing, the sealing between the humidity and temperature detector and the nitric oxide detector is increased on the one hand to ensure the accuracy of nitric oxide content detection, and on the other hand, the stability of the nitric oxide detector is increased to further ensure the normal operation of the nitric oxide breath analyzer.

[0036] Optionally, the outer shell is provided with a handle groove on both opposite sides, and the cavity wall of the receiving cavity is provided with a fixing rib, and the handle groove and the fixing rib are staggered.

[0037] By adopting the above technical solution, since both sides of the outer shell are provided with hand-holding slots, when disassembling and assembling the nitric oxide detector, the user can press the two opposing hand-holding slots with their hand so that part of the hand can be inserted into the hand-holding slots before disassembling and assembling the nitric oxide detector, thus achieving the effect of facilitating the disassembly and assembly of the nitric oxide detector; furthermore, since the hand-holding slots and the fixing ribs are staggered, the hand-holding slots and the fixing ribs can avoid each other, ensuring that the user's hand can be inserted into the hand-holding slots, thereby further facilitating the user's disassembly and assembly of the nitric oxide detector.

[0038] Optionally, the rear housing assembly further includes a purifier disposed on the rear housing, the purifier being connected to the outside and capable of purifying nitrogen monoxide in the air, and the fifth on / off valve having an air outlet connected to the fluid pump and two air inlets respectively connected to the air storage chamber and the purifier.

[0039] By adopting the above technical solution, when purifying the pipeline between the fifth shut-off valve and the fluid pump, and the pipeline between the fluid pump and the nitric oxide detector, the fifth shut-off valve switches to the position connected to the purifier, the fluid pump is started, and then the outside air enters the purifier under the action of the fluid pump, so that the purifier purifies the nitric oxide in the air. Then the purified air enters the nitric oxide detector through the fifth shut-off valve and the fluid pump and finally exits the nitric oxide detector, so as to achieve the purification of the pipeline between the fifth shut-off valve and the fluid pump, and the pipeline between the fluid pump and the nitric oxide detector. This avoids the gas remaining in the pipeline from affecting the accuracy of the detection of nitric oxide content, and thus enables the nitric oxide breath analyzer to accurately judge the patient's inflammation status.

[0040] Optionally, the rear housing assembly further includes an air socket disposed on the rear housing and a main control board disposed on the rear housing. The main control board is provided with a pressure sensing element, and the air socket has an air inlet and two air outlets respectively connected to a flow detector and the pressure sensing element.

[0041] By adopting the above technical solution, when a patient uses the nitric oxide breath analyzer, the exhalation handle needs to be connected to the air socket, and the patient needs to inhale using the exhalation handle to purify the nitric oxide in the air using the purification unit in the exhalation handle. Then, the patient blows air into the nitric oxide breath analyzer through the exhalation handle.

[0042] By incorporating a pressure sensor connected to the gas socket, the system allows the sensor to detect the internal pressure of the gas socket when the patient inhales through the exhalation handle. Specifically, when the patient inhales through the exhalation handle, the sensor detects a negative pressure inside the gas socket, closing both the first and second shut-off valves. This allows outside air to be purified by the exhalation handle before entering the patient's body. When the patient exhales through the exhalation handle into the nitric oxide breath analyzer, the sensor detects a positive pressure inside the gas socket, opening the second shut-off valve. When measuring the FeNO200 parameter, the first shut-off valve is also opened. However, when measuring the FeNO50 parameter, the first shut-off valve does not need to be opened.

[0043] Optionally, the rear housing is provided with heat dissipation holes and a cooling fan corresponding to the heat dissipation holes, the main control board is located on the side of the heat dissipation holes, and the fluid pump is provided corresponding to the heat dissipation holes.

[0044] By adopting the above technical solution, when the nitric oxide breath analyzer is working, the cooling fan is activated, causing the hot air inside the mounting cavity to be exhausted to the outside of the mounting cavity through the heat dissipation holes opposite to the cooling fan. This creates a negative pressure in the mounting cavity, allowing cold air from the outside to enter the mounting cavity through the heat dissipation holes offset from the cooling fan. Alternatively, cold air from the outside of the mounting cavity can enter the mounting cavity through the heat dissipation holes opposite to the cooling fan, causing the air pressure in the mounting cavity to gradually increase. This allows the hot air inside the mounting cavity to be exhausted through the heat dissipation holes offset from the cooling fan. This achieves the use of external cold air to dissipate heat from the components inside the mounting cavity, thereby reducing the operating temperature of the nitric oxide breath analyzer and enabling it to operate within an optimal temperature range. This extends the continuous working time of the nitric oxide breath analyzer and increases its operational stability.

[0045] Because the main control board is located on the side of the heat dissipation holes, and the fluid pump has corresponding heat dissipation holes, the heat dissipation effect on the main control board and the fluid pump can be improved, so as to ensure that the main control board and the fluid pump operate within the optimal temperature range.

[0046] Optionally, the rear housing is provided with a retaining rib, which extends circumferentially along the cooling fan.

[0047] By adopting the above technical solution, since the rear housing is provided with surrounding ribs that extend along the circumference of the cooling fan, a relatively sealed cavity is formed between the cooling fan and the rear housing. This avoids turbulence in the mounting cavity when the cooling fan is working, ensuring the stability of the airflow inside the mounting cavity and thus improving the heat dissipation effect on the components inside the mounting cavity.

[0048] Optionally, the first on / off valve and the third on / off valve are both located below the main control board, and the fourth on / off valve is located below the cooling fan.

[0049] By adopting the above technical solution, since both the first and third shut-off valves are located below the main control board, when the patient exhales into the gas storage chamber, the gas discharged through the first and third shut-off valves can flow directly to the main control board, so as to use the patient's exhaled gas to dissipate heat from the main control board, thereby further improving the heat dissipation effect of the main control board.

[0050] Since the fourth shut-off valve is located below the cooling fan, when the fluid pump pumps the gas to be detected in the gas storage chamber, the fourth shut-off valve can guide the cold air that enters the installation chamber under the action of the cooling fan to the location of the gas delivery component, thereby improving the heat dissipation effect of the gas delivery component and further ensuring that the nitric oxide breath analyzer can operate within a better temperature range.

[0051] Optionally, the nitric oxide breath analyzer further includes a battery, which is electrically connected to the main control board and is located on the side of the heat dissipation hole.

[0052] By adopting the above technical solution, since the nitric oxide breath analyzer also includes a battery that is electrically connected to the main control board, the battery can be used to power the various components of the nitric oxide breath analyzer, so that the nitric oxide breath analyzer no longer relies solely on an external power source, thereby increasing the flexibility of the nitric oxide breath analyzer. Furthermore, since the battery is located on the side of the heat dissipation vents, the airflow generated by the cooling fan can also be used to dissipate heat from the battery, thereby reducing the battery's operating temperature and extending the battery's continuous power supply time, which in turn extends the continuous working time of the nitric oxide breath analyzer on a single charge.

[0053] Optionally, the mounting cavity has a first cavity and a second cavity located below the first cavity, at least a portion of the detection structure is disposed in the first cavity, and the gas delivery assembly is disposed in the second cavity.

[0054] By adopting the above technical solution, since the gas delivery component contains many parts, resulting in a large weight, placing the gas delivery component in the lower second chamber can lower the center of gravity of the nitric oxide breath analyzer and increase its stability.

[0055] Optionally, at least a portion of the bottom of the rear housing protrudes in a direction away from the front housing, and the rear housing assembly further includes a gas socket located in the first cavity in a portion thereof.

[0056] By adopting the above technical solution, since at least a portion of the bottom of the rear housing protrudes away from the front housing, the space of the second chamber is increased, which facilitates the installation and arrangement of the gas delivery components. On the other hand, the contact area between the bottom of the nitric oxide breath analyzer and the placement platform is increased, thereby further increasing the stability of the breath analyzer. Furthermore, the nitric oxide breath analyzer can be designed with a narrow top and wide bottom structure, which reduces the volume of the nitric oxide breath analyzer compared to a design where the width of the top and bottom are the same.

[0057] Furthermore, since the rear housing assembly also includes an air socket located at least partially in the first chamber, the connection point between the connecting tube to the nitric oxide breath analyzer and the nitric oxide breath analyzer is located at the lower part of the nitric oxide breath analyzer. This avoids the risk of the nitric oxide breath analyzer tipping over due to the connecting tube being pulled, thereby further increasing the stability of the nitric oxide breath analyzer. At the same time, the larger space in the second chamber facilitates the installation of the air socket and shortens the distance between the air socket and the flow detector, thereby shortening the length of the tubing connecting the air socket and the flow detector and reducing the manufacturing cost of the nitric oxide breath analyzer.

[0058] Optionally, the rear housing assembly further includes a purifier located in the second chamber and above the gas delivery assembly, and the detection structure includes a fluid pump located in the lower part of the first chamber.

[0059] By adopting the above technical solution, since the purifier is located in the second chamber and the fluid pump is located at the bottom of the first chamber, the heavier components are brought closer to the bottom of the nitric oxide breath analyzer, thereby further lowering the center of gravity of the nitric oxide breath analyzer and increasing its stability.

[0060] Furthermore, since the fluid pump vibrates when it is working, placing the fluid pump in the lower part of the first chamber can reduce the impact of the fluid pump vibration on the stability of the nitric oxide breath analyzer to a certain extent.

[0061] Optionally, at least a portion of the upper part of the rear housing is recessed toward the side where the front housing is located to form a handheld groove, and the detection structure is located below the handheld groove.

[0062] By adopting the above technical solution, since at least a portion of the upper part of the rear housing is recessed towards the side where the front housing is located to form a handhold groove, the user can place their hand into the handhold groove when moving the nitric oxide breath analyzer, thereby facilitating the user's movement of the nitric oxide breath analyzer; and since the detection structure is located below the handhold groove, the center of gravity of the nitric oxide breath analyzer can be further lowered, thereby further increasing the stability of the nitric oxide breath analyzer.

[0063] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0064] 1. The nitric oxide breath analyzer of this application includes a front housing, a rear housing assembly, and a gas delivery assembly. The front housing has display and human-machine interaction functions. The rear housing assembly includes a rear housing and a detection structure disposed in the rear housing for detecting nitric oxide content. The rear housing is disposed in the front housing and together with the front housing forms an installation cavity. The gas delivery assembly is disposed in the installation cavity. The gas delivery assembly can adjust the flow rate of the gas to be detected and is connected to the detection structure so that the gas to be detected enters the detection structure through the gas delivery assembly. This achieves a modular design of the nitric oxide breath analyzer, allowing components with different functions to be located in different positions, avoiding the situation where components with different functions are arranged in an overlapping manner inside the nitric oxide breath analyzer. This reduces the assembly difficulty of the nitric oxide breath analyzer, thereby reducing the assembly cost and production cost. At the same time, it reduces the maintenance difficulty of the nitric oxide breath analyzer, achieving the effect of facilitating maintenance and reducing maintenance costs.

[0065] 2. The gas delivery assembly in this application includes a flow detector, a first on / off valve connected to the flow detector, a flow stabilizer connected to the flow detector, a second on / off valve connected to the flow stabilizer, a gas storage chamber connected to the second on / off valve, and a third on / off valve connected to the gas storage chamber. Both the first and third on / off valves can be connected to the outside. When sampling the gas to be detected at a flow rate of 200 mL / s and 50 mL / s, the third on / off valve is in the open state, thereby allowing the residual gas in the pipeline and the gas storage chamber to be expelled, so as to improve the sampling effect of the gas to be detected at a flow rate of 200 mL / s and 50 mL / s, and thus improve the detection accuracy of FeNO200 and FeNO50 parameters.

[0066] 3. The gas delivery assembly in this application also includes a fourth on-off valve connected to the gas storage chamber. The fourth on-off valve can communicate with the outside. When the gas to be detected stored in the gas storage chamber enters the detection structure, the fourth on-off valve is in the open state, thereby enabling the gas storage chamber to communicate with the outside through the fourth on-off valve. This ensures the smooth flow of the gas to be detected in the gas storage chamber into the detection structure, while reducing the workload of the fluid pump that pumps the gas to be detected in the gas storage chamber. This allows the nitric oxide breath analyzer to be equipped with a smaller power fluid pump, thereby reducing the manufacturing cost of the nitric oxide breath analyzer and reducing the noise generated by the nitric oxide breath analyzer during operation, further improving the patient's testing experience. Attached Figure Description

[0067] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0068] Figure 1 This is a schematic diagram of the structure of the nitric oxide breath analyzer connected to the exhalation handle in one embodiment of this application;

[0069] Figure 2 This is a schematic diagram of the structure of the nitric oxide breath analyzer connected to the nasal breathing kit in one embodiment of this application;

[0070] Figure 3 This is an explosion diagram of the nitric oxide breath analyzer described in one embodiment of this application;

[0071] Figure 4 This is a schematic diagram of the gas delivery assembly described in one embodiment of this application;

[0072] Figure 5 This is a schematic diagram of the rear shell assembly structure according to one embodiment of this application;

[0073] Figure 6 This is a schematic diagram of the rear shell assembly from another perspective in one embodiment of this application;

[0074] Figure 7 This is a cross-sectional view of the rear shell assembly described in one embodiment of this application;

[0075] Figure 8 This is a schematic diagram of the explosion structure of the nitric oxide detector described in one embodiment of this application;

[0076] Figure 9 This is a schematic diagram of the structure of the rear housing according to one embodiment of this application;

[0077] Figure 10This is a simplified diagram of the detection structure and the gas delivery assembly described in one embodiment of this application;

[0078] Figure 11 The direction of the gas flow is collected when the FeNO50 parameter is detected by the nitric oxide breath analysis described in one embodiment of this application.

[0079] Figure 12 The direction of the gas flow is collected when the FeNO200 parameter is detected by the nitric oxide breath analysis described in one embodiment of this application.

[0080] Figure 13 This describes the flow direction of the gas being detected when the nitric oxide breath analysis detection structure described in one embodiment of this application detects the gas stored in the gas storage chamber.

[0081] Figure 14 This illustrates the gas flow direction during pipeline cleaning in one embodiment of this application.

[0082] Figure 15 This describes the flow direction of the gas being detected when the nitric oxide breath analyzer described in one embodiment of this application detects the FnNO parameter.

[0083] Figure label:

[0084] 1. Front housing; 2. Rear housing assembly; 21. Rear housing; 211. Receiving cavity; 212. Heat dissipation hole; 213. Surrounding rib; 214. Fixing rib; 215. Hand grip groove; 22. Detection structure; 221. Fifth on / off valve; 222. Fluid pump; 223. Humidity and temperature detector; 224. Nitric oxide detector; 225. Second sealing ring; 226. Outer shell; 2261. Communicating port; 2262. Hand grip groove; 2263. Box body; 2264. Cover body; 227. Detection 228. Sensor body; 229. Circuit board; 2271. Battery; 2271. First sealing ring; 23. Purifier; 24. Main control board; 241. Pressure sensing element; 25. Cooling fan; 26. Gas socket; 3. Gas delivery assembly; 31. Flow detector; 32. First on / off valve; 33. Flow stabilizer; 34. Second on / off valve; 35. Base; 36. Third on / off valve; 37. Fourth on / off valve; 4. Battery; 5. Connecting tube; 6. Exhalation handle; 7. Nasal breathing kit. Detailed Implementation

[0085] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0086] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0087] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0088] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0089] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0090] Reference Figures 1 to 15 A nitric oxide breath analyzer is disclosed, comprising a front housing 1, a rear housing assembly 2, and a gas delivery assembly 3. The front housing 1 has display and human-computer interaction functions. The rear housing assembly 2 includes a rear housing 21 and a detection structure 22 disposed on the rear housing 21 for detecting nitric oxide content. The rear housing 21 is disposed on the front housing 1 and together with the front housing 1 forms an installation cavity. The gas delivery assembly 3 is disposed in the installation cavity. The gas delivery assembly 3 can adjust the flow rate of the gas to be detected and is connected to the detection structure 22 so that the gas to be detected enters the detection structure 22 through the gas delivery assembly 3.

[0091] It is understandable that the front housing 1 has a display screen and an operation area. The operation area can be integrated into the display screen, or it can be a button separately located on the front housing 1.

[0092] Specifically, when using the nitric oxide breath analyzer of this application to detect the parameters of FeNO50 or FeNO200, it is necessary to connect the exhalation handle 6, which is connected to the gas delivery assembly 3 through the connecting tube 5, so that the patient can blow air into the gas delivery assembly 3 through the exhalation handle 6; when using the nitric oxide breath analyzer of this application to detect the parameters of FnNO, it is necessary to connect the nasal exhalation kit 7, which is connected to the gas delivery assembly 3 through the connecting tube 5, so that the gas to be detected enters the gas delivery assembly 3 through the nasal exhalation kit 7.

[0093] When using the nitric oxide breath analyzer of this application, the gas to be tested enters the gas delivery assembly 3 so that the gas delivery assembly 3 adjusts the flow rate of the gas to be tested. After the flow rate is adjusted, the gas to be tested enters the detection structure 22, which then detects the nitric oxide content in the gas to be tested, thereby determining the patient's respiratory inflammation based on the nitric oxide content in the gas to be tested.

[0094] Because the detection structure 22 in this application is located in the rear housing 21, and the gas delivery assembly 3 is located in the mounting cavity formed by the rear housing 21 and the front housing 1, a modular design of the nitric oxide breath analyzer is realized. This allows components with different functions to be located in different positions, avoiding the situation where components with different functions are arranged in an interleaved manner inside the nitric oxide breath analyzer. This reduces the assembly difficulty of the nitric oxide breath analyzer, thereby reducing the assembly cost and production cost. At the same time, it reduces the maintenance difficulty of the nitric oxide breath analyzer, making it easier to maintain and reducing the maintenance cost.

[0095] This application does not specifically limit the structure of the gas transmission component 3; preferably, refer to... Figure 4 The gas delivery assembly 3 includes a flow detector 31, a first on / off valve 32 connected to the flow detector 31, a flow stabilizer 33 connected to the flow detector 31, a second on / off valve 34 connected to the flow stabilizer, a gas storage chamber connected to the second on / off valve 34, and a third on / off valve 36 connected to the gas storage chamber. Both the first on / off valve 32 and the third on / off valve 36 can be connected to the outside.

[0096] Understandably, the air inlet of the flow stabilizer 33 is connected to the air outlet of the flow detector 31 via a pipeline, the air inlet of the first on / off valve 32 is connected to the pipeline between the flow stabilizer 33 and the flow detector 31 via a pipeline, and the air inlet of the second on / off valve 34 is also connected to the air outlet of the flow stabilizer 33 via a pipeline.

[0097] It should be noted that the phrase "both the first shut-off valve 32 and the third shut-off valve 36 can be connected to the outside" means that the air outlets of the first shut-off valve 32 and the third shut-off valve 36 are connected to the internal space of the mounting cavity or directly connected to the outside of the mounting cavity.

[0098] Reference Figure 12 When collecting the gas to be detected at a flow rate of 200 mL / s, the first shut-off valve 32, the second shut-off valve 34, and the third shut-off valve 36 are all in the open state, so that the gas to be detected can enter the flow detector 31 at a flow rate of 200 mL / s. Then, the flow detector 31 detects the flow rate of the gas to be detected. Then, part of the gas to be detected after flowing through the flow detector 31 is discharged to the outside through the first shut-off valve 32, and the remaining part of the gas to be detected enters the gas storage chamber through the flow stabilizer 33 and the second shut-off valve 34. As the gas to be detected continues to enter the gas storage chamber, the original gas in the gas storage chamber is discharged to the outside through the third shut-off valve 36. When the gas to be detected is collected, the first shut-off valve 32, the second shut-off valve 34, and the third shut-off valve 36 are closed, so that the gas to be detected is stored in the gas storage chamber, thus completing the collection of the gas to be detected at a flow rate of 200 mL / s.

[0099] Reference Figure 11 When collecting the gas to be detected at a flow rate of 50 mL / s, the first on-off valve 32 is closed, while the second on-off valve 34 and the third on-off valve 36 are open, allowing the gas to enter the flow detector 31 at a flow rate of 50 mL / s. The flow detector 31 then detects the flow rate of the gas. After passing through the flow detector 31, the gas enters the gas storage chamber via the flow stabilizer 33 and the second on-off valve 34. As the gas continues to enter the gas storage chamber, the gas already in the chamber is discharged to the outside via the third on-off valve 36. After the gas collection is completed, the second on-off valve 34 and the third on-off valve 36 are closed, allowing the gas to be stored in the gas storage chamber, thus completing the collection of the gas at a flow rate of 50 mL / s.

[0100] Because the first on / off valve 32 is open when collecting the gas being tested at a flow rate of 200 mL / s, the patient's expiratory resistance is reduced. On the one hand, this ensures that the patient can exhale the gas at a flow rate of 200 mL / s, thereby improving the accuracy of FeNO200 parameter detection. This allows for accurate assessment of the patient's small airway inflammation using a nitric oxide breath analyzer. On the other hand, it improves the smoothness of the patient's exhalation, reducing the difficulty for the patient to exhale the gas at a flow rate of 200 mL / s, thus enhancing the patient's testing experience.

[0101] Furthermore, since the third shut-off valve 36 is open when sampling the gas being tested at flow rates of 200 mL / s and 50 mL / s, residual gas in the pipeline and gas storage chamber can be expelled, thereby improving the sampling accuracy of the gas being tested at flow rates of 200 mL / s and 50 mL / s, and thus improving the detection accuracy of FeNO200 and FeNO50 parameters.

[0102] This application does not specifically limit the structure of the first on / off valve 32, the second on / off valve 34, and the third on / off valve 36. Preferably, the first on / off valve 32, the second on / off valve 34, and the third on / off valve 36 are all solenoid valves to improve the automation level of the nitric oxide breath analyzer. Of course, in other embodiments, all three can also be manual valves.

[0103] This application does not specifically limit the structure of the flow detector 31. Preferably, the flow detector 31 is a flow meter to detect the flow rate of the gas being tested, thereby reducing the manufacturing cost of the nitric oxide breath analyzer. In other embodiments, the flow detector 31 can also be a gas flow sensor or other structures capable of detecting gas flow rate.

[0104] This application does not specify the structure of the flow stabilizer 33. Preferably, the flow stabilizer 33 is a constant flow valve, which allows the gas to be detected to enter the gas storage chamber at a constant flow rate, thereby reducing the manufacturing cost of the nitric oxide breath analyzer. In other embodiments, the flow stabilizer 33 can also be a flow controller or other structures that can keep the gas flow rate constant.

[0105] Furthermore, refer to Figure 4 and Figure 10 The gas delivery assembly 3 also includes a fourth shut-off valve 37 connected to the gas storage chamber, which is capable of communicating with the outside.

[0106] It is understandable that the outlet of the fourth shut-off valve 37 is connected to the gas storage chamber through a pipeline, and the inlet of the fourth shut-off valve 37 is connected to the outside.

[0107] It should be noted that the above-mentioned "fourth shut-off valve 37 can communicate with the outside" means that the air inlet of the fourth shut-off valve 37 is connected to the space inside the mounting cavity or directly connected to the space outside the mounting cavity.

[0108] When the gas to be detected, stored in the gas storage chamber, enters the detection structure 22, the fourth shut-off valve 37 is in the open state, thereby connecting the gas storage chamber to the outside through the fourth shut-off valve 37. This ensures the smooth flow of the gas to be detected from the gas storage chamber into the detection structure 22, while reducing the workload of the fluid pump 222 that pumps the gas to be detected from the gas storage chamber. This allows the nitric oxide breath analyzer to be equipped with a smaller fluid pump 222, which in turn reduces the manufacturing cost of the nitric oxide breath analyzer and reduces the noise generated during operation, further improving the patient's testing experience.

[0109] Meanwhile, in this application, by opening the fourth shut-off valve 37 when the gas to be detected in the gas storage chamber enters the detection structure 22, compared with the scheme that requires opening the first shut-off valve 32 and the second shut-off valve 34 when the gas to be detected in the gas storage chamber enters the detection structure 22, the flow path of external gas entering the gas storage chamber is shortened, thereby reducing the resistance when the gas to be detected in the gas storage chamber enters the detection structure 22. This can also achieve the effect of reducing the workload of the fluid pump 222, and further enable the configuration of a smaller power fluid pump 222 for the nitric oxide breath analyzer.

[0110] This application does not specifically limit the structure of the fourth on / off valve 37. Preferably, the fourth on / off valve 37 is also a solenoid valve to further improve the automation level of the nitric oxide breath analyzer. Of course, in other embodiments, the fourth on / off valve 37 can also be a manual valve.

[0111] This application does not specify the formation method of the gas storage cavity; preferably, refer to... Figure 4 The gas delivery assembly 3 also includes a base 35, which includes a bottom cover and a top cover located above the bottom cover. The bottom cover and the top cover are joined together to form a gas storage chamber. The flow detector 31, the first on / off valve 32, the flow stabilizer 33, the second on / off valve 34, the third on / off valve 36, and the fourth on / off valve 37 are all located on the top cover.

[0112] Understandably, the bottom cover and the top cover are sealed together so that they together form an air storage chamber.

[0113] Since the bottom cover and top cover are joined together to form a gas storage chamber, a gas storage chamber is formed inside the base 35. The flow detector 31, the first on / off valve 32, the flow stabilizer 33, the second on / off valve 34, the third on / off valve 36, and the fourth on / off valve 37 are all located on the top cover. This allows the other components of the gas delivery assembly 3 to be integrated into the base 35. This increases the flexibility of the base 35. Furthermore, when assembling the gas delivery assembly 3, the other components of the gas delivery assembly 3 can be assembled into the base 35 first, and then the gas delivery assembly 3 can be assembled into the mounting cavity. This reduces the assembly difficulty of the gas delivery assembly 3 and improves the assembly efficiency of the nitric oxide breath analyzer. At the same time, when repairing the gas delivery assembly 3, the entire gas delivery assembly 3 can be removed from the mounting cavity, which reduces the repair difficulty of the gas delivery assembly 3 and improves the repair efficiency.

[0114] This application does not specify the sealing connection method for the bottom cover and the top cover. They can be bonded with sealant, ultrasonically welded, or even sealed by setting a sealing ring between them and fixing them with screws.

[0115] This application does not specifically limit the connection method between the second on / off valve 34 and the gas storage chamber. Preferably, the outlet of the second on / off valve 34 is directly fixedly connected to the top cover, and the top cover is provided with a hole structure corresponding to the outlet of the second on / off valve 34 to communicate with the gas storage chamber, thereby realizing the connection between the second on / off valve 34 and the gas storage chamber. This avoids the need to use a pipeline to connect the second on / off valve 34 and the gas storage chamber, thereby reducing the manufacturing cost of the nitric oxide breath analyzer. At the same time, it makes the internal structure of the nitric oxide breath analyzer more regular, further facilitating the maintenance of the nitric oxide breath analyzer. Of course, in other embodiments, the outlet of the second on / off valve 34 can also be connected to the gas storage chamber through a pipeline.

[0116] This application does not specifically limit the connection method between the third shut-off valve 36 and the gas storage chamber. Preferably, the air inlet of the third shut-off valve 36 is directly fixedly connected to the top cover, and the top cover is provided with a hole structure corresponding to the air inlet of the third shut-off valve 36, which communicates with the gas storage chamber. This achieves the connection between the third shut-off valve 36 and the gas storage chamber, thereby avoiding the need to use a pipeline to connect the third shut-off valve 36 and the gas storage chamber. This reduces the manufacturing cost of the nitric oxide breath analyzer and makes the internal structure of the nitric oxide breath analyzer more regular, further facilitating the maintenance of the nitric oxide breath analyzer. Of course, in other embodiments, the air outlet of the third shut-off valve 36 can also be connected to the gas storage chamber through a pipeline.

[0117] This application does not specifically limit the connection method between the fourth shut-off valve 37 and the gas storage chamber. Preferably, the top cover is provided with a connector that connects to the gas storage chamber, and the outlet of the fourth shut-off valve 37 is connected to the connector through a pipeline to achieve the connection between the fourth shut-off valve 37 and the gas storage chamber. This also allows for unrestricted installation of the fourth shut-off valve 37, increasing the flexibility of its placement. Of course, in other embodiments, the outlet of the fourth shut-off valve 37 can also be directly fixed to the top cover, and a perforated structure can be provided on the top cover corresponding to the outlet of the fourth shut-off valve 37.

[0118] The better one is to refer to Figure 4 The second shut-off valve 34 and the third shut-off valve 36 are located at both ends along the length of the gas storage chamber, so that when the gas to be detected enters the gas storage chamber, the gas remaining in the gas storage chamber can be completely expelled from the gas storage chamber by the action of the newly entered gas to be detected.

[0119] This application does not specify the connection method between the base 35 and the mounting cavity. Preferably, the base 35 is fixedly connected to the rear housing 21 by screws to fix the air supply assembly 3 to the mounting cavity, thereby increasing the stability of the air supply assembly 3. Of course, in other embodiments, the base 35 can also be connected to the rear housing 21 or the front housing 1 by snap-fit, sliding connection, or other methods.

[0120] In other embodiments, the front housing 1 or the rear housing 21 is provided with a rib structure, and the rib structure together with the front housing 1 or the rear housing 21 forms an air storage cavity; or, an air bag is provided in the mounting cavity, and the interior of the air bag forms an air storage cavity.

[0121] In other embodiments, the gas delivery assembly 3 may also include only the flow stabilizer 33.

[0122] This application does not specifically limit the detection structure 22; preferably, refer to... Figure 5 The detection structure 22 includes a fifth on / off valve 221 connected to the gas storage chamber, a fluid pump 222 connected to the fifth on / off valve 221, and a detector connected to the fluid pump 222. The detector can detect the content of nitric oxide and is connected to the outside.

[0123] It can be understood that the air inlet of the fifth shut-off valve 221 is also connected to the air storage chamber through a pipeline, the air outlet of the fifth shut-off valve 221 is also connected to the air inlet of the fluid pump 222 through a pipeline, and the air outlet of the fluid pump 222 is also connected to the air inlet of the detector through a pipeline.

[0124] It should be noted that the "detector can detect the content of nitric oxide and is connected to the outside" mentioned above means that the gas outlet of the detector is connected to the outside, that is, the gas entering the detector can be discharged to the outside of the detector through the gas outlet of the detector.

[0125] Reference Figure 13 When detecting the FeNO50 or FeNO200 parameters, the fourth shut-off valve 37 and the fifth shut-off valve 221 are opened and the fluid pump 222 is started, so that the gas to be detected stored in the gas storage chamber enters the detector through the fifth shut-off valve 221 and the fluid pump 222 under the action of the fluid pump 222, thereby enabling the detection of the FeNO50 or FeNO200 parameters of the gas to be detected in the detector. After the gas to be detected is detected, it is directly discharged from the detector.

[0126] Reference Figure 15 When detecting the FnNO parameter, the second shut-off valve 34 and the fifth shut-off valve 221 are opened and the fluid pump 222 is started, which in turn creates a negative pressure in the tubing inside the nitric oxide breath analyzer, so that the gas inside the patient's nasal cavity enters the detector through the flow detector 31, the flow stabilizer 33, the second shut-off valve 34, the gas storage chamber, the fifth shut-off valve 221 and the fluid pump 222, thereby enabling the detector to detect the FnNO parameter in the gas being tested.

[0127] This application does not specifically limit the structure of the fluid pump 222. Preferably, the fluid pump 222 is an air pump to reduce the cost of the fluid pump 222, thereby reducing the manufacturing cost of the nitric oxide breath analyzer. In other embodiments, the fluid pump 222 can also be a gas booster or other structures capable of pumping gas.

[0128] This application does not specifically limit the structure of the detector. Preferably, the detector includes a humidity and temperature detector 223 connected to the fluid pump 222 and a nitric oxide detector 224 connected to the humidity and temperature detector 223.

[0129] Understandably, the humidity and temperature detector 223 can detect the temperature and humidity of the gas being tested, and the nitric oxide detector 224 can detect the nitric oxide content of the gas being tested.

[0130] Since the detector includes a humidity and temperature detector 223 connected to the fluid pump 222 and a nitric oxide detector 224 connected to the humidity and temperature detector 223, the nitric oxide breath analyzer can correct the nitric oxide value according to temperature and humidity, thereby further improving the accuracy of nitric oxide detection and thus enabling a more accurate assessment of the patient's inflammation status.

[0131] This application does not specify the connection method between the nitric oxide detector 224 and the rear housing 21. Preferably, refer to... Figure 6 and Figure 7The rear housing 21 has a receiving cavity 211 on the side opposite to the front housing 1, and the nitric oxide detector 224 is detachably connected to the receiving cavity 211.

[0132] It is understood that the humidity and temperature detector 223 is fixedly connected to the rear housing 21 and located in the mounting cavity.

[0133] Since the nitric oxide detector 224 is detachably connected to the receiving cavity 211, it is easy to replace the nitric oxide detector 224, thereby extending the service life of the nitric oxide breath analyzer and ensuring the detection accuracy of the nitric oxide breath analyzer, while also reducing the user's operating costs.

[0134] This application does not specify the detachable connection method between the nitric oxide detector 224 and the accommodating cavity 211. Preferably, refer to... Figure 6 The accommodating cavity 211 is provided with fixing ribs 214, which are located on opposite sides of the nitric oxide detector 224 to compress and fix the nitric oxide detector 224.

[0135] It is understandable that at least two fixing ribs 214 are provided, and the two fixing ribs 214 are located on opposite sides of the nitric oxide detector 224.

[0136] Since the nitric oxide detector 224 is fixed by the compression of the fixing rib 214 in this application, the stability of the nitric oxide detector 224 is ensured on the one hand, so as to ensure the working stability of the nitric oxide breath analyzer. On the other hand, it facilitates the disassembly and assembly of the nitric oxide detector 224, thereby improving the user experience.

[0137] The better one is to refer to Figure 6 The fixing ribs 214 are arranged in two sets at intervals, and each set of fixing ribs 214 has two opposite ribs, so as to increase the number of compression fixing points of the nitric oxide detector 224, thereby further increasing the stability of the nitric oxide detector 224.

[0138] In other implementation examples, the nitric oxide detector 224 can also be detachably connected to the accommodating cavity 211 by the cooperation of a magnet and an iron sheet. That is, one of the walls of the nitric oxide detector 224 and the accommodating cavity 211 is provided with a magnet, and one of them is provided with an iron sheet that can be magnetically attracted to the magnet.

[0139] Furthermore, refer to Figure 8The nitric oxide detector 224 includes a housing 226, a detector body 227 disposed inside the housing 226, a circuit board 228 disposed inside the housing 226, and a battery 229 disposed on the circuit board 228. The detector body 227 is electrically connected to the circuit board 228, and the battery 229 is electrically connected to the circuit board 228 to provide power to the detector body 227. The housing 226 is provided with a communication port 2261 communicating with a humidity and temperature detector, and a first sealing ring 2271 is provided at the communication port 2261 between the housing 226 and the detector body 227.

[0140] Because the nitric oxide detector 224 has a battery 229, it no longer relies solely on an external power source, enabling it to detect nitric oxide levels even without an external power supply. Furthermore, the presence of a first sealing ring 2271 at the connection port 2261, located between the outer casing 226 and the detector body 227, increases the seal between the detector body 227 and the outer casing 226. This prevents external gas from entering the outer casing 226 through the gap between them and also prevents leakage of the gas being detected inside the outer casing 226 through the gap between the detector body 227 and the outer casing 226. This ensures the accuracy of nitric oxide detection, allowing for precise assessment of the patient's inflammation status using a nitric oxide breath analyzer.

[0141] Furthermore, refer to Figure 7 The humidity and temperature detector 223 is provided with a second sealing ring 225, which is sleeved on the outside of the housing 226. This increases the sealing between the humidity and temperature detector 223 and the nitric oxide detector 224 to ensure the accuracy of nitric oxide content detection. It also increases the stability of the nitric oxide detector 224 to further ensure the normal operation of the nitric oxide breath analyzer.

[0142] Furthermore, refer to Figure 6 The outer shell 226 has a handle groove 2262 on each of its opposite sides, and the cavity wall of the accommodating cavity 211 has a fixing rib 214 on its opposite side. The handle groove 2262 and the fixing rib 214 are staggered.

[0143] Since the outer casing 226 has hand slots 2262 on both opposite sides, when disassembling and assembling the nitric oxide detector 224, the user can press the two opposite hand slots 2262 with their hand so that part of the hand can be inserted into the hand slots 2262 before disassembling and assembling the nitric oxide detector 224. This facilitates the disassembly and assembly of the nitric oxide detector 224. Furthermore, since the hand slots 2262 and the fixing ribs 214 are misaligned, they can avoid each other, ensuring that the user's hand can be inserted into the hand slots 2262. This further facilitates the user's disassembly and assembly of the nitric oxide detector 224.

[0144] The better one is to refer to Figure 6 The hand-holding groove 2262 is located between two adjacent sets of fixing ribs 214, which makes the user hold the nitric oxide detector 224 closer to the middle position in the length direction of the nitric oxide detector 224, so as to further facilitate the disassembly and assembly of the nitric oxide detector 224.

[0145] This application does not specifically limit the structure of the outer casing 226; preferably, refer to... Figure 8 The outer casing 226 includes a housing 2263 and a cover 2264 detachably connected to the housing 2263. The housing 2263 and the cover 2264 together form a receiving cavity. The circuit board 228, battery 229, and detector body 227 are all disposed in the receiving cavity. A connecting port 2261 is provided in the housing 2263. The housing 2263 is provided with a snap-fit ​​groove, and the cover 2264 is provided with a snap-fit ​​rib that can snap-fit ​​with the snap-fit ​​groove. The snap-fit ​​rib and the snap-fit ​​groove are used to achieve a detachable connection between the cover 2264 and the housing 2263, so that the detector body 227 and the battery 229 can be replaced separately, thereby further reducing the user's operating costs. In other embodiments, the outer casing 226 can also be a one-piece structure, and the detector body 227, circuit board, and battery 229 are all installed inside the outer casing 226 through the connecting port 2261.

[0146] In other embodiments, the detector may also include only the nitric oxide detector 224; or, the nitric oxide detector 224 may be fixedly connected to the rear housing 21.

[0147] In other embodiments, the detection structure 22 may also include only a fluid pump 222 and a nitric oxide detector 224.

[0148] Since the nitric oxide content varies in different parts of the body, for example, the FeNO200 parameter may be as low as a single digit, the FeNO50 parameter is usually in the double digits, and the FnNO parameter is in the triple digits; in order to improve the accuracy of the detection of the FeNO200, FeNO50 and FnNO parameters of patients, the following implementation methods can also be adopted.

[0149] In a preferred embodiment, refer to Figure 5 The rear housing assembly 2 also includes a purifier 23 disposed on the rear housing 21. The purifier 23 is connected to the outside and can purify nitrogen monoxide in the air. The fifth shut-off valve 221 has an air outlet connected to the fluid pump 222 and two air inlets connected to the air storage chamber and the purifier 23, respectively.

[0150] Understandably, the air outlet of the purifier 23 is also connected to the air inlet of the fifth shut-off valve 221 through a pipeline. The fifth shut-off valve 221 has one closed state and two open states. When the fifth shut-off valve 221 is in the closed state, it cannot be connected to the air storage chamber or the purifier 23. When the fifth shut-off valve 221 is in one of the open states, it connects the air storage chamber to the fluid pump 222. When the fifth shut-off valve 221 is in the other open state, it connects the purifier 23 to the fluid pump 222.

[0151] Reference Figure 14 When purifying the pipeline between the fifth shut-off valve 221 and the fluid pump 222, and the pipeline between the fluid pump 222 and the nitric oxide detector 224, the fifth shut-off valve 221 switches to a position where the purifier 23 can connect to the fluid pump 222, and the fluid pump 222 is started. Then, the outside air enters the purifier 23 under the action of the fluid pump 222. At the same time, the purifier 23 purifies the nitric oxide in the air. Then, the purified air enters the nitric oxide detector 224 through the fifth shut-off valve 221 and the fluid pump 222 and is finally discharged from the nitric oxide detector 224. This achieves the purification of the pipeline between the fifth shut-off valve 221 and the fluid pump 222, and the pipeline between the fluid pump 222 and the nitric oxide detector 224, thereby avoiding the influence of residual gas in the pipeline on the accuracy of nitric oxide content detection. In this way, the nitric oxide breath analyzer can be used to accurately judge the patient's inflammation status.

[0152] Preferably, the fifth shut-off valve 221 is a three-way solenoid valve to improve the automation level of the nitric oxide breath analyzer.

[0153] This application does not specifically limit the structure of the purifier 23. Preferably, the purifier 23 is a potassium permanganate tank to ensure the purification effect on nitric oxide. In other embodiments, the purifier 23 may also be a molecular sieve or other structures capable of purifying nitric oxide.

[0154] In a preferred embodiment, refer to Figure 5 The rear housing assembly 2 also includes an air socket 26 disposed on the rear housing 21 and a main control board 24 disposed on the rear housing 21. The main control board 24 is provided with a pressure sensing element 241. The air socket 26 has an air inlet and two air outlets respectively connected to the flow detector 31 and the pressure sensing element 241.

[0155] Understandably, the two air outlets of the gas socket 26 are also connected to the flow detector 31 and the pressure sensor 241 respectively through pipelines. The first on / off valve 32, the second on / off valve 34, the third on / off valve 36, the fourth on / off valve 37 and the fifth on / off valve 221 are all electrically connected to the main control board 24 so that they can be controlled by the main control board 24.

[0156] Reference Figure 11 and Figure 12 When a patient uses a nitric oxide breath analyzer to test the FeNO200 or FeNO50 parameters, the exhalation handle 6 needs to be connected to the air socket 26 through the connecting tube 5. The patient needs to inhale using the exhalation handle 6 so that the purification unit in the exhalation handle 6 can purify the nitric oxide in the air. Then, the patient blows air into the nitric oxide breath analyzer through the exhalation handle 6.

[0157] By setting up a pressure sensing element 241, and connecting the pressure sensing element 241 to the air socket 26, the pressure sensing element 241 can detect the air pressure inside the air socket 26 when the patient inhales through the exhalation handle 6. That is, when the patient inhales through the exhalation handle 6, the pressure sensing element 241 detects that the air socket 26 is under negative pressure, at which point the first shut-off valve 32 and the second shut-off valve 34 are closed, allowing outside air to be purified by the exhalation handle 6 before entering the patient's body. When the patient blows air into the nitric oxide breath analyzer through the exhalation handle 6, the pressure sensing element 241 detects that the air socket 26 is under positive pressure, at which point the second shut-off valve 34 is opened. When detecting the FeNO200 parameter, the first shut-off valve 32 is opened simultaneously. However, when detecting the FeNO50 parameter, the first shut-off valve 32 does not need to be opened.

[0158] This application does not specifically limit the structure of the pressure sensing element 241. Preferably, the pressure sensing element 241 is a pressure sensor to reduce the manufacturing cost of the nitric oxide breath analyzer. In other embodiments, the pressure sensing element 241 can also be a vacuum gauge or other structures capable of detecting gas pressure.

[0159] In a preferred embodiment, refer to Figure 5 The rear housing 21 is provided with heat dissipation holes 212 and a cooling fan 25 corresponding to some of the heat dissipation holes 212. The main control board 24 is located on the side of the heat dissipation holes 212, and the fluid pump 222 is provided corresponding to some of the heat dissipation holes 212.

[0160] Understandably, the cooling fan 25 is fixedly connected to the rear housing 21.

[0161] When the nitric oxide breath analyzer is working, the cooling fan 25 is activated, causing the hot air inside the mounting cavity to be exhausted to the outside of the mounting cavity through the heat dissipation holes 212 opposite to the cooling fan 25. This creates a negative pressure in the mounting cavity, allowing cold air from the outside to enter the mounting cavity through the heat dissipation holes 212 that are offset from the cooling fan 25. Alternatively, cold air from the outside of the mounting cavity can enter the mounting cavity through the heat dissipation holes 212 opposite to the cooling fan 25, causing the air pressure in the mounting cavity to gradually increase. This allows the hot air inside the mounting cavity to be exhausted through the heat dissipation holes 212 that are offset from the cooling fan 25. This utilizes the cold air from the outside to dissipate heat from the components inside the mounting cavity, reducing the operating temperature of the nitric oxide breath analyzer and enabling it to operate within an optimal temperature range. This extends the continuous working time of the nitric oxide breath analyzer and increases its operational stability.

[0162] Since the main control board 24 is located on the side of the heat dissipation hole 212, and the fluid pump 222 is provided with a corresponding portion of the heat dissipation hole 212, the heat dissipation effect of the main control board 24 and the fluid pump 222 can be improved, so as to ensure that the main control board 24 and the fluid pump 222 operate within a better temperature range.

[0163] Furthermore, refer to Figure 9 The rear housing 21 is provided with a surrounding rib 213, which extends circumferentially along the cooling fan 25. The inner side of the surrounding rib 213 contacts the outer periphery of the cooling fan 25, thereby forming a relatively sealed cavity between the cooling fan 25 and the rear housing 21. This prevents turbulence from forming in the mounting cavity when the cooling fan 25 is working, ensuring the stability of the airflow inside the mounting cavity and thus improving the heat dissipation effect on the components inside the mounting cavity. At the same time, the surrounding rib 213 can also be used to position the cooling fan 25 to increase the stability of the cooling fan 25.

[0164] Furthermore, the first shut-off valve 32 and the third shut-off valve 36 are both located below the main control board 24, and the fourth shut-off valve 37 is located below the cooling fan 25.

[0165] Since both the first shut-off valve 32 and the third shut-off valve 36 are located below the main control board 24, when the patient exhales into the air storage chamber, the gas discharged through the first shut-off valve 32 and the third shut-off valve 36 can flow directly to the main control board 24, so as to use the patient's exhaled gas to dissipate heat from the main control board 24, thereby further improving the heat dissipation effect of the main control board 24.

[0166] Since the fourth shut-off valve 37 is located below the cooling fan 25, when the fluid pump 222 pumps the gas to be detected in the gas storage chamber, the fourth shut-off valve 37 can guide the cold air that enters the installation chamber under the action of the cooling fan 25 to the location of the gas delivery component 3, so as to improve the heat dissipation effect of the gas delivery component 3, and further ensure that the nitric oxide breath analyzer can work in a better temperature range.

[0167] The better one is to refer to Figure 4 The outlets of the first shut-off valve 32 and the third shut-off valve 36 are both set upwards so that the gas discharged through the first shut-off valve 32 and the third shut-off valve 36 flows directly to the main control board 24; the fourth shut-off valve 37 is located directly below the cooling fan 25 to improve the guiding effect of the fourth shut-off valve 37 on the airflow inside the mounting cavity.

[0168] The better one is to refer to Figure 5 The air inlet of the purifier 23 is located above the air outlets of the first shut-off valve 32 and the third shut-off valve 36 and below the main control board 24. Since the nitric oxide breath analyzer is used to detect the patient's inflammation, the environment in which the nitric oxide breath analyzer is used contains a large amount of nitric oxide. By placing the air inlet of the purifier 23 below the main control board 24 and above the first shut-off valve 32 and the third shut-off valve 26, most of the air entering the purifier 23 comes from the same patient's exhaled air. Compared to a solution where all the air entering the purifier 23 comes from air, this reduces the purification load of the purifier 23, extends the service life of the purifier 23, and ensures the purification effect on nitric oxide in the gas.

[0169] Furthermore, refer to Figure 3 The nitric oxide breath analyzer also includes a battery 4, which is electrically connected to the main control board 24 and is located on the side of the heat dissipation hole 212.

[0170] Since the nitric oxide breath analyzer also includes a battery 4, which is electrically connected to the main control board 24, the battery 4 can be used to power the various components of the nitric oxide breath analyzer, so that the nitric oxide breath analyzer no longer has to rely solely on an external power source, thereby increasing the flexibility of the nitric oxide breath analyzer.

[0171] Furthermore, since the battery 4 is located on the side of the heat dissipation hole 212, the airflow generated by the cooling fan 25 can also be used to dissipate heat from the battery 4, thereby reducing the temperature of the battery 4 during operation, thus extending the continuous power supply time of the battery 4, and further extending the continuous working time of the nitric oxide breath analyzer on a single charge.

[0172] Furthermore, the mounting cavity has a first cavity and a second cavity located below the first cavity, at least a portion of the detection structure 22 is disposed in the first cavity, and the gas delivery assembly 3 is disposed in the second cavity.

[0173] Because the gas delivery assembly 3 contains many components, it is quite heavy. By placing the gas delivery assembly 3 in the lower second chamber, the center of gravity of the nitric oxide breath analyzer can be lowered, thereby increasing the stability of the nitric oxide breath analyzer.

[0174] Furthermore, refer to Figure 5 At least a portion of the bottom of the rear housing 21 protrudes in a direction away from the front housing 1, and the rear housing assembly 2 also includes a gas socket 26 with at least a portion located in the first cavity.

[0175] Because at least a portion of the bottom of the rear housing 21 protrudes away from the front housing 1, it increases the space of the second chamber, facilitating the installation of the gas delivery assembly 3. It also increases the contact area between the bottom of the nitric oxide breath analyzer and the placement platform, thereby further increasing the stability of the breath analyzer. Furthermore, it allows the nitric oxide breath analyzer to have a structure that is narrower at the top and wider at the bottom, which reduces the volume of the nitric oxide breath analyzer compared to a design where the width of the top and bottom are the same.

[0176] Furthermore, since the rear housing assembly 2 also includes an air socket 26 with at least a portion located in the first chamber, the connection point between the connecting tube 5 of the exhalation handle 6 and the nitric oxide breath analyzer is located at the lower part of the nitric oxide breath analyzer. This avoids the risk of the nitric oxide breath analyzer tipping over due to the connecting tube 5 being pulled, thereby further increasing the stability of the nitric oxide breath analyzer. At the same time, the larger space in the second chamber facilitates the installation of the air socket 26 and shortens the distance between the air socket 26 and the flow detector 31, thereby shortening the length of the pipeline connecting the air socket 26 and the flow detector 31 and reducing the manufacturing cost of the nitric oxide breath analyzer.

[0177] Furthermore, refer to Figure 5 The rear housing assembly 2 also includes a purifier 23, which is located in the second chamber and above the gas delivery assembly 3. The detection structure 22 includes a fluid pump 222, which is located in the lower part of the first chamber. This allows the heavier components to be closer to the bottom of the nitric oxide breath analyzer, thereby further lowering the center of gravity of the nitric oxide breath analyzer and increasing its stability.

[0178] Furthermore, since the fluid pump 222 vibrates when it is working, placing the fluid pump 222 in the lower part of the first chamber can reduce the impact of the vibration of the fluid pump 222 on the stability of the nitric oxide breath analyzer to a certain extent.

[0179] Furthermore, refer to Figure 6 At least a portion of the upper part of the rear housing 21 is recessed towards the side where the front housing 1 is located, forming a handhold slot 215. When the user moves the nitric oxide breath analyzer, they can put their hand into the handhold slot 215 to facilitate the movement of the nitric oxide breath analyzer. Furthermore, the detection structure 22 is located below the handhold slot 215, which further lowers the center of gravity of the nitric oxide breath analyzer and increases its stability.

[0180] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0181] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0182] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A nitric oxide breath analyzer, characterized in that, include: The front housing (1) has display and human-computer interaction functions; The rear shell assembly (2) includes a rear shell (21) and a detection structure (22) disposed in the rear shell (21) for detecting the content of nitric oxide. The rear shell (21) is disposed in the front shell (1) and together with the front shell (1) forms an installation cavity. Gas delivery assembly (3) is disposed in the mounting cavity. The gas delivery assembly (3) can adjust the flow rate of the gas to be detected and is connected to the detection structure (22) so that the gas to be detected enters the detection structure (22) through the gas delivery assembly (3).

2. The nitric oxide breath analyzer according to claim 1, characterized in that, The gas delivery assembly (3) includes a flow detector (31), a first on / off valve (32) connected to the flow detector (31), a flow stabilizer (33) connected to the flow detector (31), a second on / off valve (34) connected to the flow stabilizer (33), a gas storage chamber connected to the second on / off valve (34), and a third on / off valve (36) connected to the gas storage chamber. Both the first on / off valve (32) and the third on / off valve (36) can be connected to the outside.

3. The nitric oxide breath analyzer according to claim 2, characterized in that, The gas delivery assembly (3) also includes a fourth on / off valve (37) connected to the gas storage chamber, which is capable of communicating with the outside.

4. A nitric oxide breath analyzer according to claim 3, characterized in that, The gas delivery assembly (3) also includes a base (35), which includes a bottom cover and a top cover located above the bottom cover. The bottom cover and the top cover are joined together to form the gas storage chamber. The flow detector (31), the first on / off valve (32), the flow stabilizer (33), the second on / off valve (34), the third on / off valve (36), and the fourth on / off valve (37) are all located on the top cover.

5. A nitric oxide breath analyzer according to claim 3, characterized in that, The detection structure (22) includes a fifth on / off valve (221) connected to the gas storage chamber, a fluid pump (222) connected to the fifth on / off valve (221), and a detector connected to the fluid pump (222). The detector is capable of detecting the content of nitric oxide and is connected to the outside.

6. A nitric oxide breath analyzer according to claim 5, characterized in that, The detectors include a humidity and temperature detector (223) connected to the fluid pump (222) and a nitric oxide detector (224) connected to the humidity and temperature detector (223).

7. A nitric oxide breath analyzer according to claim 6, characterized in that, The rear housing (21) has a receiving cavity (211) on the side opposite to the front housing (1), and the nitric oxide detector (224) is detachably connected to the receiving cavity (211).

8. A nitric oxide breath analyzer according to claim 7, characterized in that, The accommodating cavity (211) is provided with fixing ribs (214), which are located on opposite sides of the nitric oxide detector (224) to compress and fix the nitric oxide detector (224).

9. A nitric oxide breath analyzer according to claim 7, characterized in that, The nitric oxide detector (224) includes a housing (226), a detector body (227) disposed inside the housing (226), a circuit board (228) disposed inside the housing (226), and a battery (229) disposed on the circuit board (228). The detector body (227) is electrically connected to the circuit board (228), and the battery (229) is electrically connected to the circuit board (228) to provide power to the detector body (227). The housing (226) is provided with a communication port (2261) communicating with the humidity and temperature detector (223). A first sealing ring (2271) is provided at the communication port (2261) between the housing (226) and the detector body (227).

10. A nitric oxide breath analyzer according to claim 9, characterized in that, The humidity and temperature detector (223) is provided with a second sealing ring (225), which is sleeved on the outside of the outer shell (226).

11. A nitric oxide breath analyzer according to claim 9, characterized in that, The outer shell (226) is provided with a hand buckle groove (2262) on both opposite sides, and the cavity wall of the accommodating cavity (211) is provided with a fixing rib (214) on the opposite side. The hand buckle groove (2262) and the fixing rib (214) are misaligned.

12. A nitric oxide breath analyzer according to claim 5, characterized in that, The rear housing assembly (2) also includes a purifier (23) disposed on the rear housing (21). The purifier (23) is connected to the outside and can purify nitrogen monoxide in the air. The fifth on / off valve (221) has an outlet connected to the fluid pump (222) and two inlets connected to the gas storage chamber and the purifier (23) respectively.

13. A nitric oxide breath analyzer according to claim 12, characterized in that, The rear housing assembly (2) also includes an air socket (26) disposed on the rear housing (21) and a main control board (24) disposed on the rear housing (21). The main control board (24) is provided with a pressure sensing element (241). The air socket (26) has an air inlet and two air outlets respectively connected to the flow detector (31) and the pressure sensing element (241).

14. A nitric oxide breath analyzer according to claim 13, characterized in that, The rear housing (21) is provided with heat dissipation holes (212) and a cooling fan (25) provided in a corresponding part of the heat dissipation holes (212). The main control board (24) is located on the side of the heat dissipation holes (212), and the fluid pump (222) is provided in a corresponding part of the heat dissipation holes (212).

15. A nitric oxide breath analyzer according to claim 14, characterized in that, The rear housing (21) is provided with a surrounding rib (213), which extends circumferentially along the cooling fan (25).

16. A nitric oxide breath analyzer according to claim 14, characterized in that, The first on / off valve (32) and the third on / off valve (36) are both located below the main control board (24), and the fourth on / off valve (37) is located below the cooling fan (25).

17. A nitric oxide breath analyzer according to claim 14, characterized in that, The nitric oxide breath analyzer also includes a battery (4), which is electrically connected to the main control board (24) and is located on the side of the heat dissipation hole (212).

18. A nitric oxide breath analyzer according to any one of claims 1-17, characterized in that, The mounting cavity has a first cavity and a second cavity located below the first cavity, at least a portion of the detection structure (22) is disposed in the first cavity, and the gas delivery assembly (3) is disposed in the second cavity.

19. A nitric oxide breath analyzer according to claim 18, characterized in that, At least a portion of the bottom of the rear housing (21) protrudes in a direction away from the front housing (1), and the rear housing assembly (2) also includes an air socket (26) with at least a portion located in the first cavity.

20. A nitric oxide breath analyzer according to claim 18, characterized in that, The rear housing assembly (2) also includes a purifier (23) located in the second chamber and above the gas delivery assembly (3), and the detection structure (22) includes a fluid pump (222) located in the lower part of the first chamber.

21. A nitric oxide breath analyzer according to any one of claims 1-17, characterized in that, At least a portion of the upper part of the rear housing (21) is recessed toward the side where the front housing (1) is located and forms a handhold groove (215), and the detection structure (22) is located below the handhold groove (215).

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