A hand-held oxygen analyzer

Abstract

This utility model belongs to the technical field of gas analysis instruments, specifically disclosing a handheld oxygen analyzer, including a housing. The housing houses a display module, a main control board module, and a detection module for detecting oxygen concentration and flow rate. Both the display module and the detection module are electrically connected to the main control board module. The detection module transmits the detected oxygen concentration and flow rate information to the main control board module, and the display module displays the gas flow rate and oxygen concentration detected by the detection module. A charging interface is located on one side of the housing, and the detection module has an air inlet and an air outlet, both of which penetrate the housing. This utility model improves measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of gas analysis instrument technology, specifically to a handheld oxygen analyzer. Background Technology

[0002] Handheld oxygen analyzers, with their portable design and real-time monitoring capabilities, play a vital role in industrial production, medical emergencies, and environmental monitoring. These devices can quickly and accurately detect oxygen concentrations, providing crucial data support for these fields.

[0003] However, current handheld oxygen analyzers on the market still face numerous technical bottlenecks: measurement accuracy needs improvement; precise flow feedback is impossible; battery life is insufficient; charging efficiency is low; they are prone to clogging and contamination; and the human-machine interface is not user-friendly. These problems not only affect the safety of industrial production but may also lead to serious consequences due to data errors in medical emergency scenarios, necessitating urgent technological improvements and optimizations. Utility Model Content

[0004] This invention provides a handheld oxygen analyzer, the purpose of which is to improve measurement accuracy.

[0005] This utility model is achieved through the following technical solution: a handheld oxygen analyzer includes a housing, within which are a display module, a main control board module, and a detection module for detecting oxygen concentration and oxygen flow rate. Both the display module and the detection module are electrically connected to the main control board module. The detection module can transmit the detected oxygen concentration and flow rate information to the main control board module, and the display module can display the gas flow rate and oxygen concentration detected by the detection module. A charging interface is provided on one side of the housing, and the detection module has an air inlet and an air outlet, both of which penetrate the housing.

[0006] Compared with existing technologies, this solution has the following advantages and beneficial effects: In this solution, the detection module is directly electrically connected to the main control board module. The detection module integrates flow and concentration detection modules, forming a complete link with the main control board module for flow and concentration acquisition, data processing, and display feedback. Flow and concentration data are synchronously transmitted to the main control board module, processed by its internal algorithm, and dynamically displayed on the display module. This solves the problem of traditional equipment only measuring concentration without flow feedback, and improves the accuracy and reliability of oxygen concentration measurement. Furthermore, this solution enables real-time monitoring of gas flow, providing more comprehensive data analysis capabilities. In oxygen delivery scenarios, it can simultaneously monitor whether the concentration meets the standard and whether the flow rate is stable, avoiding production safety hazards caused by abnormal flow (such as a sudden drop in flow due to pipeline leakage); in medical oxygen supply scenarios, it can accurately reflect the actual oxygen flow rate of patients, assisting medical staff in adjusting the parameters of oxygen supply equipment and improving the accuracy of treatment.

[0007] The air inlet and outlet are directly connected to the detection module, resulting in a short gas transmission path with no dead corners in the pipeline. After the test is completed, residual gas can be quickly discharged through reverse purging, avoiding cross-contamination between different batches of test gases and solving the accuracy deviation problem caused by long gas paths and a lot of residue in traditional equipment.

[0008] Furthermore, the detection module includes a detection housing and an oxygen concentration sensor and a flow sensor installed inside the detection housing. A gas channel for gas flow is provided inside the detection housing. The oxygen concentration sensor and the flow sensor are both installed in the gas channel. The inlet and the outlet are respectively connected to the two ends of the gas channel.

[0009] Beneficial effects: The gas channel within the detection housing provides a directional path for gas flow. The gas path formed by the inlet, gas channel, and outlet reduces the residence time of gas within the device, avoiding detection delays caused by traditional non-directional gas paths. The oxygen concentration sensor and flow sensor are directly installed within the gas channel, allowing direct contact with the gas to be detected without complex pipeline transmission, reducing signal attenuation and further improving the accuracy of concentration and flow detection. This specifically addresses the issues of insufficient measurement accuracy and inaccurate flow feedback in the background technology. The detection housing provides an independent protective space for the sensors, preventing electromagnetic interference from other modules inside the housing (such as the main control board) from affecting sensor readings.

[0010] Furthermore, the oxygen concentration sensor is a 3D ion flow oxygen sensor, and the flow sensor is a high-precision thermal flow sensor.

[0011] Beneficial effects: This solution employs a 3D ion flow oxygen sensor, which expands the gas contact area through a three-dimensional electrode structure, enabling more accurate capture of oxygen molecules compared to traditional planar electrode sensors. The high-precision thermal flow sensor in this solution, relying on the principle of heat conduction, can capture minute changes in gas flow in real time and quickly synchronize changes in gas flow rate.

[0012] Furthermore, both the air inlet and the air outlet are equipped with filters, and the filters, the air inlet, and the air outlet are all detachable and connectable.

[0013] Beneficial effects: The filters at the air inlet and outlet can intercept dust, water vapor, and impurities in the gas, preventing impurities from entering the gas channel of the detection module, preventing blockage of the oxygen concentration sensor and flow sensor, ensuring long-term stable operation of the sensors, and reducing detection interruptions or data deviations caused by blockage. The filter screen is detachably connected to both the air inlet and outlet, allowing for manual removal of the filter screen for cleaning or replacement without disassembling the equipment or using specialized tools. This makes maintenance simple and efficient, significantly reducing maintenance time and costs. Furthermore, an air inlet head and an air outlet head are respectively connected to the air inlet and the air outlet, and the air inlet head and the air outlet head are respectively threadedly connected to the air inlet and the air outlet.

[0014] Beneficial effects: This design uses threaded connections for both the air inlet and outlet heads, making connection and operation simpler and more convenient, and facilitating faster disassembly. Compared to snap-fit ​​or plug-in methods, the threaded engagement is tighter, effectively resisting vibrations and impacts from hand-held movement and minor collisions. This prevents gas leaks or poor airflow caused by loose gas interfaces, ensuring a stable gas flow through the gas channel during detection and providing a stable gas environment for accurate sensor detection.

[0015] Furthermore, both the air inlet and the air outlet have stepped hole structures on their inner sides, and the filter screen is located in the stepped holes. Tightening the air inlet head and the air outlet head can respectively press the corresponding filter screen.

[0016] Beneficial effects: The stepped hole structure in the air inlet and outlet provides precise positioning space for the filter screen, which can limit the filter screen from shifting or deforming during gas flow; at the same time, tightening the air inlet or outlet head can directly press the filter screen, forming a double fixation of stepped hole limit and interface pressing, avoiding the displacement problem caused by airflow impact or equipment vibration that is common with traditional filter screens that are only fixed by clips. This ensures that the filter screen always covers the air path, continuously intercepts impurities, and ensures the anti-clogging effect of the detection module.

[0017] Furthermore, the filter screen is a stainless steel filter screen.

[0018] Beneficial effects: Stainless steel has high hardness and wear resistance, and can withstand the clamping force when tightening the air inlet or outlet head, avoiding the deformation and damage caused by squeezing of traditional plastic or cotton filters; at the same time, its corrosion resistance can be adapted to industrial environments containing acid and alkali gases, medical environments with humidity, etc., and it is not corroded by water vapor and corrosive impurities. Its service life is longer than that of ordinary filters, which can reduce the frequency of replacement and maintenance and reduce long-term use costs.

[0019] Furthermore, the display module includes a display panel, which is mounted on the front of the housing.

[0020] Beneficial effects: The display panel is mounted on the front of the housing, which is consistent with the user's natural line of sight when holding the device. Data such as oxygen concentration, flow rate, and battery level can be clearly read without deliberately adjusting the grip posture. It avoids the problems of viewing angle deviation and glare that are caused by traditional side-mounted or back-mounted panels. It is especially suitable for scenarios that require rapid data acquisition, such as medical emergency and industrial inspection, and improves information reading efficiency.

[0021] Furthermore, a battery module is also provided inside the housing, which is connected to the main control board module, and the battery module integrates a fast charging chip.

[0022] Beneficial effects: This solution can provide long-term power support for the analyzer, and the battery module in this solution integrates a fast charging chip, which can realize fast charging function and improve the convenience of use.

[0023] Furthermore, the housing includes a front cover and a rear cover, which are detachably connected.

[0024] Beneficial effects: The housing in this design consists of a front cover and a rear cover, which are detachably connected. This allows for easy access to all internal modules by simply removing the connection between the front and rear covers when the analyzer malfunctions, such as when the battery needs replacement due to aging or the detection module needs calibration. This eliminates the need to damage the housing. For example, when replacing the battery module, the battery can be quickly inserted or removed by opening the front cover without disassembling the entire device. When inspecting the display panel, the wiring can be checked or the panel replaced by removing the front cover. This avoids the problems of integrated housings requiring complete disassembly for maintenance and easily damaged components, significantly shortening maintenance time and lowering the maintenance threshold. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of one embodiment of a handheld oxygen analyzer according to the present invention. Figure 2 This is a perspective view of another embodiment of a handheld oxygen analyzer according to the present invention; Figure 3 This is a three-dimensional exploded view of an embodiment of a handheld oxygen analyzer according to the present invention; Figure 4 This is an exploded view of an embodiment of a handheld oxygen analyzer according to the present invention, taken from the front view. Figure 5 This is a perspective view of an embodiment of a handheld oxygen analyzer according to the present invention, taken from a low angle. Figure 6 This is a cross-sectional view of an embodiment of a handheld oxygen analyzer according to the present invention.

[0026] The attached diagram shows the markings and corresponding component names: 1. Housing; 11. Front cover; 12. Rear cover; 13. Flathead screw; 14. Countersunk screw; 15. Cap; 2. Detection module; 200. Gas channel; 201. Oxygen concentration sensor; 202. Flow sensor; 203. Detection housing; 3. Battery module; 4. Display module; 401. Contact piece; 5. Main control board module; 6. Air inlet; 7. Air outlet; 8. Power switch; 9. Charging port; 10. Filter. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0028] As one embodiment of this application, such as Figures 1-4 As shown, this embodiment provides a handheld oxygen analyzer, including a housing 1. The housing 1 is provided with a display module 4, a main control board module 5, and a detection module 2 for detecting oxygen concentration and oxygen flow rate. The display module 4 and the detection module 2 are both electrically connected to the main control board module 5. The detection module 2 can transmit the detected oxygen concentration information and flow rate information to the main control board module 5. The display module 4 can display the gas flow rate and oxygen concentration detected by the detection module 2. like Figure 2 As shown, a charging interface 9 is provided on one side of the housing 1. The charging interface 9 is connected to the main control board module 5. The charging interface 9 can provide power to the entire analyzer. The detection module 2 is provided with an air inlet and an air outlet, both of which pass through the housing 1.

[0029] In one embodiment, combined Figure 6 As shown, the detection module 2 includes a detection housing 203 and an oxygen concentration sensor 201 and a flow sensor 202 installed inside the detection housing 203. A gas channel 200 for gas flow is provided inside the detection housing 203. The oxygen concentration sensor 201 and the flow sensor 202 are both installed inside the gas channel 200. The inlet and outlet are respectively located at the two ends of the gas channel 200. In this embodiment, the gas channel 200 is L-shaped, so that the inlet and outlet are distributed on the adjacent sides of the detection housing 203.

[0030] In this embodiment, the oxygen concentration sensor 201 is a 3D ion flow oxygen sensor, and the flow sensor 202 is a high-precision thermal flow sensor 202.

[0031] In one embodiment, combined Figure 6 As shown, a filter screen 10 is provided at both the air inlet and the air outlet. The filter screen 10 can be detachably connected to both the air inlet and the air outlet. Specifically, an air inlet head 6 and an air outlet head 7 are respectively connected to the air inlet and the air outlet, and the air inlet head 6 and the air outlet head 7 are respectively threaded to the air inlet and the air outlet. One end of the air inlet head 6 extends out of the outer side of the housing 1, and one end of the air outlet head 7 passes through the housing 1 and is flush with the outer side of the housing 1.

[0032] In this embodiment, both the air inlet and the air outlet are provided with stepped hole structures on their inner sides. The filter screen 10 is located in the stepped holes. Tightening the air inlet head 6 and the air outlet head 7 can respectively press the corresponding filter screen 10.

[0033] In this embodiment, the filter screen 10 is a stainless steel filter screen 10, that is, it is made of stainless steel high-precision filter material, which can effectively filter dust, water vapor and other impurities in the air.

[0034] In this embodiment, the filter screen 10, the air inlet head 6, and the air outlet head 7 are detachably connected to the air inlet and air outlet, which facilitates cleaning and replacement.

[0035] In one embodiment, combined Figure 3 and Figure 4 As shown, the housing 1 also has a battery module 3 inside, which is connected to the main control board module 5. The battery module 3 integrates a fast charging chip. In this embodiment, the battery module 3 is equipped with a large-capacity lithium battery (capacity not less than 10000mAh) to provide long-term power support for the device, and uses a fast charging chip to achieve fast charging function.

[0036] In one embodiment, combined Figures 1-4 As shown, the display module 4 includes a display panel, which is a high-definition display panel that supports touch operation. It can display information such as gas flow rate, oxygen concentration, and battery power in real time, and supports functions such as parameter setting, data query, and detection mode switching. The display panel is mounted on the front of the housing 1 for easy viewing. The display module 4 also includes a drive circuit and contact pieces 401, such as... Figure 4 As shown, one end of the contact piece 401 in the display module 4 is connected to the drive circuit, and the other end is connected to the main control board module 5. The drive circuit converts the digital signals (such as binary data of oxygen concentration) transmitted by the main control board into drive signals that can be recognized by the display panel, and displays them through the display panel.

[0037] In one embodiment, such as Figure 1 and Figure 3 As shown, in this embodiment, a power switch 8 is also provided on one side of the housing 1. The power switch 8 is directly connected in series in the main power supply circuit between the battery module 3 and the main control board module 5, and is used to control the power supply of the entire analyzer.

[0038] In one embodiment, such as Figure 3 and Figure 4 As shown, the housing 1 includes a front cover 11 and a rear cover 12, which are detachably connected. Specifically, in this embodiment, the display module 4 is fixed to the front cover 11 by screws, and the front cover 11 and the rear cover 12 are fixed together by two flathead screws 13 and two countersunk screws 14.

[0039] In one embodiment, such as Figure 4 and Figure 5 As shown, in this embodiment, four hidden holes are provided on the back cover 12 to accommodate countersunk screws 14 and flathead screws 13 respectively. Rubber caps 15 are placed on the nuts of countersunk screws 14 and flathead screws 13. The caps 15 are located in the hidden holes. This can protect and shield the screws, and at the same time make the appearance more beautiful.

[0040] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A handheld oxygen analyzer, comprising a housing, characterized in that, The housing contains a display module, a main control board module, and a detection module for detecting oxygen concentration and oxygen flow rate. Both the display module and the detection module are electrically connected to the main control board module. The detection module can transmit the detected oxygen concentration and flow rate information to the main control board module, and the display module can display the gas flow rate and oxygen concentration detected by the detection module. A charging interface is provided on one side of the housing, and an air inlet and an air outlet are provided on the detection module, both of which penetrate the housing.

2. The handheld oxygen analyzer according to claim 1, characterized in that, The detection module includes a detection housing and an oxygen concentration sensor and a flow sensor installed inside the detection housing. A gas channel for gas flow is provided inside the detection housing. The oxygen concentration sensor and the flow sensor are both installed in the gas channel. The inlet and the outlet are respectively connected to the two ends of the gas channel.

3. A handheld oxygen analyzer according to claim 2, characterized in that, The oxygen concentration sensor is a 3D ion flow oxygen sensor, and the flow sensor is a high-precision thermal flow sensor.

4. A handheld oxygen analyzer according to claim 2, characterized in that, Both the air inlet and the air outlet are equipped with filters, and the filters, the air inlet and the air outlet are detachable and connectable.

5. A handheld oxygen analyzer according to claim 4, characterized in that, An air inlet head and an air outlet head are respectively connected to the air inlet and the air outlet head, and the air inlet head and the air outlet head are respectively threaded to the air inlet and the air outlet head.

6. A handheld oxygen analyzer according to claim 5, characterized in that, Both the air inlet and the air outlet have stepped hole structures on their inner sides. The filter screen is located in the stepped hole. Tightening the air inlet head and the air outlet head can respectively press the corresponding filter screen.

7. A handheld oxygen analyzer according to claim 4, characterized in that, The filter screen is a stainless steel filter screen.

8. A handheld oxygen analyzer according to claim 1, characterized in that, The display module includes a display panel, which is mounted on the front of the housing.

9. A handheld oxygen analyzer according to claim 1, characterized in that, The housing also contains a battery module, which is connected to the main control board module and integrates a fast charging chip.

10. A handheld oxygen analyzer according to any one of claims 1-9, characterized in that, The housing includes a front cover and a rear cover, which are detachably connected.

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