CN221859954U - A small oxygen concentrator calibration device - Google Patents

Abstract

The application provides a calibration device of a small-sized oxygenerator, which belongs to the technical field of oxygenerator calibration equipment and comprises the following components: the oxygen outlet of the oxygenerator is connected with the main flow meter so as to detect the gas flow in the air inlet pipeline through the main flow meter, namely the flow of oxygen produced by the oxygenerator; the dew point detection pipeline and the physicochemical parameter detection pipeline are simultaneously communicated with the discharge end of the main flowmeter, so that the prepared oxygen flows to the dew point meter and the gas content detector respectively, the dew point value of the prepared oxygen is detected through the dew point meter, namely the moisture content of the oxygen is detected, and the component content of the prepared oxygen is detected through the gas content detector, namely the concentration of the oxygen is detected; the pipeline design is carried out aiming at the characteristics and technical indexes of the small-sized oxygen generator, the oxygen generator is connected with the calibration device once, so that unified metering of the whole set of device detection equipment can be realized, the inconvenience of carrying each independent detection equipment respectively is avoided, the testing efficiency is improved, and the portable oxygen generator has good portability.

Description

A small oxygen concentrator calibration device

Technical Field

The present application belongs to the technical field of oxygen concentrator calibration equipment, and specifically relates to a small oxygen concentrator calibration device.

Background Art

Medical oxygen concentrators are classified as Class II medical devices in the country. The performance and calibration of small oxygen concentrators must meet the relevant requirements of JJF 1891-2021 "Calibration Specifications for Medical Molecular Sieve Oxygen Concentrators". Therefore, before using the small oxygen concentrator, the technical indicators of the small oxygen concentrator need to be calibrated according to the requirements in the "Calibration Specifications".

When calibrating the technical indicators of traditional medical oxygen concentrators, it is generally achieved by carrying multiple sets of independent general detection equipment to measure the technical indicators of oxygen taken out by the oxygen concentrator respectively. However, this calibration system is too cumbersome and is only applicable to fixed large medical oxygen concentrators. In addition, the technical indicators of small oxygen concentrators are different from those of large oxygen concentrators. The existing calibration system is difficult to directly and quickly and effectively detect the technical indicators of portable small oxygen concentrators.

Utility Model Content

The present application aims to solve at least one of the technical problems existing in the prior art or related art.

In view of this, according to an embodiment of the present application, a small oxygen concentrator calibration device is proposed, including: an air inlet interface, an air inlet pipeline, a dew point detection pipeline and a physical and chemical parameter detection pipeline; the inlet end of the air inlet interface is detachably connected to the oxygen outlet of the oxygen concentrator; the inlet end of the air inlet pipeline is connected to the discharge end of the air inlet interface, and the air inlet pipeline includes a main flow meter, which is used to detect the flow rate of the gas in the air inlet pipeline; the inlet end of the dew point detection pipeline is connected to the first discharge end of the main flow meter, and the dew point detection pipeline includes a dew point meter, which is used to detect the moisture content of the gas in the dew point detection pipeline; the inlet end of the physical and chemical parameter detection pipeline is connected to the second discharge end of the main flow meter, and the physical and chemical parameter detection pipeline includes a gas content detector, which is at least used to detect the oxygen concentration in the gas in the physical and chemical parameter detection pipeline.

In a feasible implementation, the dew point detection pipeline also includes a dew point flowmeter and a dew point meter switch valve, the inlet end of the dew point flowmeter is connected to the first discharge end of the main flowmeter, the discharge end of the dew point flowmeter is connected to the inlet end of the dew point switch valve, and the discharge end of the dew point switch valve is connected to the inlet end of the dew point meter.

In a feasible implementation, the physical and chemical parameter detection pipeline also includes a physical and chemical flow meter and a stop valve, the gas content detector includes an analyzer and an oxygen analyzer, the inlet end of the physical and chemical flow meter is connected to the second outlet end of the main flow meter, the outlet end of the physical and chemical flow meter is connected to the inlet end of the stop valve, the outlet end of the stop valve is connected to the inlet end of the analyzer, and the outlet end of the analyzer is connected to the inlet end of the oxygen analyzer.

In a feasible implementation, the small oxygen generator calibration device also includes: an emptying pipeline; the emptying pipeline includes an emptying valve and an emptying interface, the inlet end of the emptying valve is connected to the third discharge end of the main flow meter, and the discharge end of the emptying valve is connected to the emptying interface.

In a feasible implementation manner, the small oxygen generator calibration device also includes: a control mainboard, a touch screen, a computer and a power supply bus; the control mainboard is electrically connected to the main flow meter, the dew point meter and the gas content detector; the touch screen is electrically connected to the control mainboard; the computer is electrically connected to the touch screen; the power supply bus is electrically connected to the main flow meter, the dew point meter, the gas content detector and the touch screen.

In a feasible implementation, the small oxygen generator calibration device also includes: an outer box, a liner block and a panel; the liner block is embedded in the outer box, and a plurality of first receiving grooves and a plurality of second receiving grooves are provided on the liner block, and the flow meter, dew point meter, and gas content detector are fixed in the first receiving grooves; the panel is fixed in the outer box, and the panel covers the liner block, and a plurality of mounting ports are provided on the panel, and the mounting ports correspond one to one with the second receiving grooves, and the dew point flow meter, physical and chemical flow meter, dew point meter switch valve, stop valve, drain valve, touch screen and computer are embedded in the corresponding second receiving grooves after passing through the mounting ports.

In a feasible implementation manner, the small oxygen generator calibration device also includes: a fixing seat, a threaded hole and a locking piece; the dew point flow meter and the physical and chemical flow meter are fixedly connected to the fixing seat, the fixing seat includes a mounting plate and a support plate, the mounting plate is provided with a first mounting hole, the support plate is vertically arranged with the mounting plate, and the support plate is provided with a second mounting hole; the threaded hole is arranged on the panel; after the locking piece passes through the first mounting hole, the locking piece is threadedly connected to the threaded hole; or after the locking piece passes through the second mounting hole, the locking piece is threadedly connected to the threaded hole.

In a feasible implementation, a flow calibration sensor module is provided in the main flow meter, and the flow calibration sensor module includes a laminar pressure difference sensor, a pressure sensor and a temperature sensor; a moisture content calibration module is provided in the dew point meter, and the moisture content calibration module includes a thin film capacitive dew point analyzer; a gas component content calibration module is provided in the analyzer, and the gas component content calibration module includes an infrared gas detector; an oxygen concentration calibration module is provided in the oxygen analyzer, and the oxygen concentration calibration module includes a plasma flow oxygen sensor.

Compared with the prior art, the small oxygen generator calibration device of the present application has the following beneficial effects:

The small oxygen generator calibration device provided in the embodiment of the present application includes an air inlet interface, an air inlet pipeline, a dew point detection pipeline and a physical and chemical parameter detection pipeline; the oxygen outlet of the oxygen generator is connected to the main flow meter to detect the gas flow in the air inlet pipeline, that is, to detect the oxygen flow produced by the oxygen generator; the dew point detection pipeline and the physical and chemical parameter detection pipeline are connected to the discharge end of the main flow meter at the same time, so that the produced oxygen flows to the dew point meter and the gas content detector respectively, and then the dew point value of the produced oxygen is detected by the dew point meter, that is, the moisture content of the oxygen is detected, and then the dew point value of the produced oxygen is detected by the dew point meter. The gas content detector detects the component content of the produced oxygen, that is, the concentration of oxygen; the pipeline is designed specifically according to the characteristics of small oxygen output flow and low pressure of small oxygen concentrators and the technical indicators of small oxygen concentrators, so that the small oxygen concentrator and the calibration device can be connected at one time, and the test "gas source" can be provided uniformly, which can not only realize the unified measurement of the detection equipment of the whole set of devices, avoid the inconvenience of carrying each independent detection equipment separately, improve the test efficiency, have good portability, but also realize the separate measurement of each independent detection equipment, and ensure the flexibility of measurement of the measuring equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

FIG1 is a schematic diagram of a small oxygen generator calibration device according to an embodiment of the present application;

FIG2 is a schematic structural diagram of a small oxygen generator calibration device according to an embodiment of the present application;

FIG3 is a schematic diagram of the gas circuit control of a small oxygen generator calibration device according to an embodiment of the present application;

FIG4 is a schematic structural diagram of an outer box of a small oxygen generator calibration device according to an embodiment of the present application;

FIG5 is a schematic structural diagram of a liner block of a small oxygen generator calibration device according to an embodiment of the present application;

FIG6 is a schematic structural diagram of a fixing base of a small oxygen generator calibration device according to an embodiment of the present application;

The corresponding relationship between the reference numerals and component names in FIGS. 1 to 6 is as follows:

10. Air inlet interface; 11. Air inlet pipeline; 12. Dew point detection pipeline; 13. Physical and chemical parameter detection pipeline; 14. Exhaust pipeline; 15. Control main board; 16. Touch screen; 17. Computer; 18. Power supply bus; 19. Outer box; 20. Liner; 21. Panel; 22. First accommodating groove; 23. Second accommodating groove; 24. Mounting port; 25. Fixed seat; 26. Locking piece; 27. First mounting hole; 28. Second mounting hole; 111. Main flow meter; 121. Dew point meter; 122. Dew point flow meter; 123. Dew point meter switch valve; 131. Analyzer; 132. Oxygen analyzer; 133. Physical and chemical flow meter; 134. Stop valve; 141. Exhaust valve; 142. Exhaust interface.

DETAILED DESCRIPTION

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

As shown in FIG1 , according to an embodiment of the present application, a small oxygen concentrator calibration device is proposed, comprising: an air inlet interface 10, an air inlet pipeline 11, a dew point detection pipeline 12 and a physicochemical parameter detection pipeline 13; the inlet end of the air inlet interface 10 is detachably connected to the oxygen outlet of the oxygen concentrator; the inlet end of the air inlet pipeline 11 is connected to the outlet end of the air inlet interface 10, and the air inlet pipeline 11 comprises a main flow meter 111, which is used to detect the flow rate of the gas in the air inlet pipeline 11; the inlet end of the dew point detection pipeline 12 is connected to the first outlet end of the main flow meter 111, and the dew point detection pipeline 12 comprises a dew point meter 121, which is used to detect the moisture content of the gas in the dew point detection pipeline 12; the inlet end of the physicochemical parameter detection pipeline 13 is connected to the second outlet end of the main flow meter 111, and the physicochemical parameter detection pipeline 13 comprises a gas content detector, which is at least used to detect the oxygen concentration in the gas in the physicochemical parameter detection pipeline 13.

The small oxygen generator calibration device provided in the embodiment of the present application includes an air inlet interface 10, an air inlet pipeline 11, a dew point detection pipeline 12 and a physical and chemical parameter detection pipeline 13; the oxygen outlet of the oxygen generator is connected to the main flow meter 111, so that the gas flow in the air inlet pipeline 11 is detected by the main flow meter 111, that is, the oxygen flow produced by the oxygen generator is detected; the dew point detection pipeline 12 and the physical and chemical parameter detection pipeline 13 are simultaneously connected to the discharge end of the main flow meter 111, so that the produced oxygen flows to the dew point meter 121 and the gas content detector respectively, and then the dew point value of the produced oxygen is detected by the dew point meter 121, that is, the dew point value of the produced oxygen is detected. The moisture content of oxygen is detected, and then the component content of the produced oxygen is detected by a gas content detector, that is, the concentration of oxygen is detected; according to the characteristics of small oxygen output flow and low pressure of small oxygen concentrators and the technical indicators of small oxygen concentrators, targeted pipeline design is carried out, so that the small oxygen concentrator and the calibration device can be connected once, multiple technical indicators can be detected, and the test "gas source" can be uniformly provided, which can not only realize the unified measurement of the detection equipment of the whole set of devices, avoid the inconvenience of carrying each independent detection equipment separately, improve the test efficiency, have good portability, but also realize the separate measurement of each independent detection equipment, and ensure the flexibility of measurement of the measuring equipment.

As shown in Figures 1 to 3, in a feasible implementation, the dew point detection pipeline 12 also includes a dew point flowmeter 122 and a dew point meter switch valve 123, the inlet end of the dew point flowmeter 122 is connected to the first outlet end of the main flowmeter 111, the outlet end of the dew point flowmeter 122 is connected to the inlet end of the dew point switch valve, and the outlet end of the dew point switch valve is connected to the inlet end of the dew point meter 121.

In this technical solution, a dew point flowmeter 122 and a dew point meter switch valve 123 are arranged between the inlet end of the dew point meter 121 and the first discharge end of the main flowmeter 111, so as to control the connection or disconnection of the dew point detection pipeline 12 with the first discharge end of the main flowmeter 111 through the dew point meter switch valve 123; when it is necessary to detect the dew point value of oxygen, the physical and chemical parameter detection pipeline 13 is maintained, the dew point meter switch valve 123 is opened, so that the dew point detection pipeline 12 is unobstructed, and then the oxygen flow is accurately fine-tuned through the dew point flowmeter 122 to meet the characteristics of small oxygen output flow and low pressure of the small oxygen generator, which is helpful to improve the accuracy of the dew point meter 121 in detecting the small oxygen generator and ensure the adaptability to the calibration of the small oxygen generator; when it is necessary to detect the oxygen concentration, the dew point meter switch valve 123 is closed to connect the physical and chemical parameter detection pipeline 13 with the dew point meter 121.

As shown in Figures 1 to 3, in a feasible implementation manner, the physical and chemical parameter detection pipeline 13 also includes a physical and chemical flowmeter 133 and a stop valve 134, the gas content detector includes an analyzer 131 and an oxygen analyzer 132, the inlet end of the physical and chemical flowmeter 133 is connected to the second outlet end of the main flowmeter 111, the outlet end of the physical and chemical flowmeter 133 is connected to the inlet end of the stop valve 134, the outlet end of the stop valve 134 is connected to the inlet end of the analyzer 131, and the outlet end of the analyzer 131 is connected to the inlet end of the oxygen analyzer 132.

In this technical solution, a physicochemical flowmeter 133 and a stop valve 134 are arranged between the inlet end of the analyzer 131 and the second outlet end of the main flowmeter 111, so as to control the connection or disconnection between the physicochemical parameter detection pipeline 13 and the second outlet end of the main flowmeter 111 through the stop valve 134; when it is necessary to detect the content of components in oxygen, the dew point meter switch valve 123 is closed, and the stop valve 134 is opened to make the physicochemical parameter detection pipeline 13 unblocked, and the oxygen content is detected by the oxygen analyzer 132 to detect the oxygen concentration, and the content of other components in oxygen is detected by the analyzer 131, and the flow rate of oxygen is accurately fine-tuned by the physicochemical flowmeter 133 to meet the characteristics of small oxygen output flow rate and low pressure of the small oxygen generator, which is helpful to improve the accuracy of the calibration of the analyzer 131 and the oxygen analyzer 132 for the small oxygen generator, and ensure the adaptability of the calibration of the small oxygen generator.

Furthermore, the analyzer 131 is a CO/CO ₂ integrated analyzer to detect the CO content and CO ₂ content in the produced oxygen.

As shown in FIG. 1 and FIG. 3 , in a feasible implementation manner, the small oxygen generator calibration device further includes: an emptying pipeline 14; the emptying pipeline 14 includes an emptying valve 141 and an emptying interface 142, the inlet end of the emptying valve 141 is connected to the third discharge end of the main flow meter 111, and the discharge end of the emptying valve 141 is connected to the emptying interface 142.

In this technical solution, the exhaust pipeline 14 is connected to the third discharge end of the main flow meter 111, so that the air intake pipeline 11 and the exhaust pipeline 14, the dew point detection pipeline 12 and the physical and chemical parameter detection pipeline 13 form a "one inlet and three outlets" structure. When detecting the flow parameters of the small oxygen concentrator, the exhaust pipeline 14 is used as an oxygen flow test pipeline to achieve the function of one-time access to the oxygen concentrator and multi-indicator detection, which reduces the difficulty of operation and improves the detection efficiency; the excess gas except the sampled gas can be discharged through the exhaust interface 142 through the exhaust pipeline 14 to maintain the balance of the internal pressure of the calibration device, ensure that the calibration device can work normally and extend its service life; at the same time, the gas flow of the exhaust pipeline 14 is fine-tuned through the exhaust valve 141 to maintain the stability of the oxygen flow in the calibration device, so that the flow in the calibration device maintains the original value of the small oxygen concentrator, thereby helping to improve the accuracy and effectiveness of the detection results of the oxygen flow, dew point value, CO content, _CO2 content and oxygen concentration of the small oxygen concentrator.

As shown in Figures 1 and 2, in a feasible implementation, the small oxygen generator calibration device also includes: a control mainboard 15, a touch screen 16, a computer 17 and a power supply bus 18; the control mainboard 15 is electrically connected to the main flow meter 111, the dew point meter 121 and the gas content detector; the touch screen 16 is electrically connected to the control mainboard 15; the computer 17 is electrically connected to the touch screen 16; the power supply bus 18 is electrically connected to the main flow meter 111, the dew point meter 121, the gas content detector and the touch screen 16.

In this technical solution, the power supply bus 18 provides unified power supply for the electrical components inside the calibration device; the control main board 15 is connected to the touch screen 16 via the serial port so as to control the control main board 15 to perform system operation through the touch screen 16; the main flow meter 111, the dew point meter 121, the analyzer 131 and the oxygen analyzer 132 are connected in series with the control main board 15 via the serial port, and various test results are collected through the control main board 15; the control main board 15 is connected to the computer 17 via a serial communication cable so as to upload the test results collected by the control main board 15 to the database set in the computer 17, thereby realizing the functions of saving, statistics, analysis, query, export and various printing of the test results, and effectively integrating the control system and the data analysis database system, so that the function of the calibration device is improved from pure inspection to data statistics and analysis of the test results while detecting, thereby improving the flexibility and continuity of data collection and facilitating use.

It is understandable that each detection instrument is provided with a sensor, which collects the technical indicators of oxygen produced by the small oxygen generator detected by the instrument, transmits them to the control main board 15, and then displays each technical indicator of oxygen through the touch screen 16.

As a preferred solution, users can implement remote monitoring of calibration devices at dispersed sites through Internet of Things technology to facilitate remote monitoring and management of oxygen generator equipment.

As shown in Figures 4 and 5, in a feasible implementation, the small oxygen generator calibration device also includes: an outer box 19, a liner block 20 and a panel 21; the liner block 20 is embedded in the outer box 19, and a plurality of first receiving grooves 22 and a plurality of second receiving grooves 23 are provided on the liner block 20, and the main flow meter, the dew point meter 121, and the gas content detector are fixed in the first receiving groove 22; the panel 21 is fixed in the outer box 19, and the panel 21 covers the liner block 20, and a plurality of mounting ports 24 are provided on the panel 21, and the mounting ports 24 correspond to the second receiving grooves 23 one by one, and the dew point flow meter 122, the physical and chemical flow meter 133, the dew point meter switch valve 123, the stop valve 134, the drain valve 141, the touch screen 16 and the computer 17 are embedded in the corresponding second receiving groove 23 after passing through the mounting ports 24.

In this technical solution, after the outer box 19 is opened, the panel 21 is exposed. The dew point flow meter 122, the physical and chemical flow meter 133, the dew point meter switch valve 123, the stop valve 134, the drain valve 141 and the touch screen 16 are arranged on the panel 21, so as to facilitate the quick operation of the calibration device; the panel 21 is fixed on the liner 20, and the main flow meter, dew point meter 121, the analyzer 131 and the dew point meter 121 that do not need to be directly operated are installed in the first installation groove of the liner 20, so that the liner 20 can be used to shockproof and fix the instruments; the top of the liner 20 is covered by the panel 21 to protect the instruments, and the instruments are connected by pipelines and integrated inside the outer box 19, so that the calibration device has good portability, avoids the inconvenience of carrying each independent detection equipment separately, and is particularly suitable for the calibration of portable small oxygen generators.

Furthermore, the panel 21 is also provided with an auxiliary receiving groove, in which auxiliary accessories such as a hose for connecting a small oxygen concentrator to the air inlet interface 10, a power cord of a computer 17, a serial communication cable, etc. are placed, which is convenient to carry and use.

As shown in Figures 2 and 6, in a feasible implementation, the small oxygen generator calibration device also includes: a fixing seat 25, a threaded hole and a locking member 26; the dew point flowmeter 122 and the physical and chemical flowmeter 133 are fixedly connected to the fixing seat 25, the fixing seat 25 includes a mounting plate and a support plate, the mounting plate is provided with a first mounting hole 27, the support plate is vertically arranged with the mounting plate, and the support plate is provided with a second mounting hole 28; the threaded hole is arranged on the panel 21; after the locking member 26 passes through the first mounting hole 27, the locking member 26 is threadedly connected to the threaded hole; or after the locking member 26 passes through the second mounting hole 28, the locking member 26 is threadedly connected to the threaded hole.

In this technical solution, the dew point flowmeter 122 and the physicochemical flowmeter 133 are installed on the fixing seat 25, and the locking piece 26 fastens the fixing seat 25 to the panel 21 through the first mounting hole 27; when the dew point test and the component content test are performed on oxygen, the dew point flowmeter 122 and the physicochemical flowmeter 133 need to remain in a vertical state. At this time, the locking piece 26 is removed from the first mounting hole 27 to make the support plate fit the panel 21, and then the locking piece 26 is passed through the second mounting hole 28 and threadedly connected to the panel 21 to vertically fix the fixing seat 25 on the panel 21, and then the dew point flowmeter 122 and the physicochemical flowmeter 133 are vertically fixed on the panel 21, so as to ensure the accuracy of the adjustment of the dew point flowmeter 122 and the physicochemical flowmeter 133, thereby improving the accuracy of the dew point detection and the oxygen component content detection.

In a feasible implementation, a flow calibration sensor module is provided in the main flow meter 111, and the flow calibration sensor module includes a laminar pressure difference sensor, a pressure sensor and a temperature sensor; a moisture content calibration module is provided in the dew point meter 121, and the moisture content calibration module includes a thin film capacitive dew point analyzer 131; a gas component content calibration module is provided in the analyzer 131, and the gas component content calibration module includes an infrared gas detector; an oxygen concentration calibration module is provided in the oxygen analyzer 132, and the oxygen concentration calibration module includes a plasma flow oxygen sensor.

In this technical solution, in order to meet the special conditions of plateau environment applications and the accuracy requirements specified in the calibration specifications, a laminar mass flowmeter based on the laminar mass flow detection principle was selected as the flow calibration module. The module has a built-in laminar pressure difference sensor, and cooperates with a high-precision pressure sensor and a temperature sensor to achieve real-time data compensation. It has the characteristics of good adaptability to plateau environments, small size, and high stability. Changes in plateau environmental air pressure and temperature will cause measurement results to drift. An oxygen sensor based on the plasma flow detection principle was selected as the oxygen concentration calibration module. The module has a built-in plateau altitude self-calibration curve, has good adaptability to plateau environments, and has the characteristics of small size, light weight, and long service life. The thin film capacitive dew point analyzer 131 was selected as the moisture content calibration module. The module has the characteristics of good adaptability to plateau environment, small size and high stability. The carbon monoxide/carbon dioxide gas detector based on the infrared detection principle was selected as the carbon monoxide/carbon dioxide content calibration module. The infrared detection principle has good adaptability to the special environment of the plateau. Laminar mass flowmeter, plasma oxygen sensor, thin film capacitive dew point analyzer 131, infrared gas detector and other equipment that adapt well to changes in air pressure and temperature are selected as core calibration modules. The adaptability of the device to the plateau environment is improved in terms of detection principles and technologies. The design for the special environment of the plateau is particularly suitable for plateau troops.

As a preferred solution, the control motherboard 15 is provided with a sensor accuracy self-calibration module. When the performance of the device is in doubt during actual use on the plateau, the control motherboard 15 can use the standard gas, high-precision flow generator, etc. in the calibration module to self-calibrate the sensor accuracy and perform on-site confirmation and calibration of the calibration device.

It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims (8)

1. A small-sized oxygen generator calibration device, characterized in that the small-sized oxygen generator calibration device comprises:

The inlet end of the air inlet interface is detachably connected with the oxygen outlet of the oxygenerator;

The inlet end of the air inlet pipeline is communicated with the outlet end of the air inlet interface, and the air inlet pipeline comprises a main flow meter which is used for detecting the flow of the air in the air inlet pipeline;

The inlet end of the dew point detection pipeline is communicated with the first outlet end of the main flowmeter, and the dew point detection pipeline comprises a dew point meter which is used for detecting the moisture content of the gas in the dew point detection pipeline;

The inlet end of the physical and chemical parameter detection pipeline is communicated with the second outlet end of the main flowmeter, and the physical and chemical parameter detection pipeline comprises a gas content detector which is at least used for detecting the oxygen concentration in the gas in the physical and chemical parameter detection pipeline.

2. The calibration device for a miniature oxygenerator of claim 1, wherein:

The dew point detection pipeline further comprises a dew point flowmeter and a dew point meter switch valve, wherein the inlet end of the dew point flowmeter is communicated with the first outlet end of the main flowmeter, the outlet end of the dew point flowmeter is communicated with the inlet end of the dew point meter switch valve, and the outlet end of the dew point meter switch valve is communicated with the inlet end of the dew point meter.

3. A calibration device for a miniature oxygenerator as set forth in claim 2 wherein:

The gas content detector comprises an analyzer and an oxygen analyzer, wherein the inlet end of the physical and chemical flowmeter is communicated with the second outlet end of the main flowmeter, the outlet end of the physical and chemical flowmeter is communicated with the inlet end of the stop valve, the outlet end of the stop valve is communicated with the inlet end of the analyzer, and the outlet end of the analyzer is communicated with the inlet end of the oxygen analyzer.

4. A calibration device for a miniature oxygenerator according to claim 3, the calibration device of the small-sized oxygenerator is characterized by further comprising:

The emptying pipeline comprises an emptying valve and an emptying connector, the inlet end of the emptying valve is communicated with the third discharge end of the main flow meter, and the discharge end of the emptying valve is communicated with the emptying connector.

5. A calibration device for a miniature oxygenerator according to claim 4, the calibration device of the small-sized oxygenerator is characterized by further comprising:

the control main board is electrically connected with the main flowmeter, the dew point meter and the gas content detector;

the touch screen is electrically connected with the control main board;

the computer is electrically connected with the touch screen;

The power supply row is electrically connected with the main flowmeter, the dew point meter, the gas content detector and the touch screen.

6. A calibration device for a miniature oxygenerator according to claim 5, the calibration device of the small-sized oxygenerator is characterized by further comprising:

An outer case;

the lining block is embedded into the outer box, a plurality of first accommodating grooves and a plurality of second accommodating grooves are formed in the lining block, and the flowmeter, the dew point meter and the gas content detector are fixed in the first accommodating grooves;

The panel, the panel is fixed in the outer box, the panel covers on the pad, be provided with a plurality of installing port on the panel, the installing port with second holding tank one-to-one, dew point flowmeter the physicochemical flowmeter, dew point meter ooff valve the stop valve the exhaust valve the touch-sensitive screen with the computer passes behind the installing port imbeds corresponding in the second holding tank.

7. A calibration device for a miniature oxygenerator according to claim 6, the calibration device of the small-sized oxygenerator is characterized by further comprising:

The dew point flowmeter and the physicochemical flowmeter are fixedly connected to the fixing base, the fixing base comprises a mounting plate and a supporting plate, the mounting plate is provided with a first mounting hole, the supporting plate is perpendicular to the mounting plate, and the supporting plate is provided with a second mounting hole;

a threaded hole provided on the panel;

The locking piece is in threaded connection with the threaded hole after penetrating through the first mounting hole; or after the locking piece passes through the second mounting hole, the locking piece is in threaded connection with the threaded hole.

8. A calibration device for a miniature oxygenerator as set forth in claim 3 wherein:

A flow calibration sensor module is arranged in the main flowmeter and comprises a laminar flow differential pressure sensor, a pressure sensor and a temperature sensor;

The dew point meter is internally provided with a moisture content calibration module, and the moisture content calibration module comprises a thin film capacitance dew point analyzer;

A gas component content calibration module is arranged in the analyzer, and the gas component content calibration module comprises an infrared gas detector;

An oxygen concentration calibration module is arranged in the oxygen analyzer and comprises a plasma flow oxygen sensor.