Mask oxygen concentration testing device and method

Abstract

The invention discloses a mask oxygen concentration testing device and method and relates to the field of testing. The mask oxygen concentration testing device comprises a test bin, an oxygen bottle, an oxygen supply device, a tool clamp, a breathing simulation device and an oxygen concentration detection device, and the tool clamp, the breathing simulation device and the oxygen concentration detection device are arranged in the test bin. The tool clamp is provided with two breathing interfaces communicated with the cavity, the breathing simulation device and the oxygen concentration detection device are connected with the two breathing interfaces respectively, and the oxygen supply device is connected with the oxygen bottle and the oxygen mask respectively; the oxygen supply device is used for conveying oxygen in the oxygen bottle to the cavity at a set flow rate, the breathing simulation device is used for alternately inhaling air from the cavity and exhaling air into the cavity at set pressure and frequency, and the oxygen concentration detection device is used for detecting the oxygen concentration in the cavity at the exhaling tail end of the breathing simulation device. The mask oxygen concentration testing device and method can comprehensively and accurately detect the oxygen concentration when the oxygen mask is worn for breathing.

Description

Technical Field

[0001] The present application relates to the field of testing, and in particular, to a mask oxygen concentration testing device and method. Background Art

[0002] Oxygen masks are devices that are used in conjunction with the oxygen supply system to supply oxygen to passengers as required when the cabin is compromised to ensure passenger safety. In order to ensure the practical safety of oxygen masks, the oxygen supply of oxygen masks needs to be tested to meet usage requirements.

[0003] Currently available oxygen mask oxygen concentration testing devices are unable to accurately and comprehensively test the oxygen concentration of an oxygen mask. Summary of the invention

[0004] The purpose of the present application is to provide a mask oxygen concentration testing device and method, which can comprehensively and accurately detect the oxygen concentration when breathing while wearing an oxygen mask.

[0005] This application is implemented as follows:

[0006] The present application provides a mask oxygen concentration testing device, which includes a test chamber, an oxygen cylinder, an oxygen supply device, and a fixture, a breathing simulation device and an oxygen concentration detection device arranged in the test chamber. The fixture is used to detachably connect the oxygen mask so that a cavity is enclosed between the fixture and the oxygen mask. The fixture is provided with two breathing interfaces connected to the cavity. The breathing simulation device and the oxygen concentration detection device are respectively connected to the two breathing interfaces. The oxygen supply device is respectively connected to the oxygen cylinder and the oxygen mask. The oxygen supply device is used to transport the oxygen in the oxygen cylinder to the cavity at a set flow rate. The breathing simulation device is used to alternately inhale from the cavity and exhale into the cavity at a set pressure and frequency. The oxygen concentration detection device is used to detect the oxygen concentration in the cavity at the exhalation end of the breathing simulation device.

[0007] In some optional embodiments, the breathing simulation device includes a breathing simulation shell with a simulation cavity therein, a piston movably disposed in the simulation cavity, and a driving mechanism for driving the piston to reciprocate along the simulation cavity, the simulation cavity is connected to the breathing interface through a connecting port, the driving mechanism and the breathing simulation shell are respectively connected to a photoelectric switch and a sensor sheet, and the photoelectric switch is electrically connected to an oxygen concentration detection device; when the driving mechanism drives the piston to move to one end away from the breathing interface, the photoelectric switch senses the sensor sheet and controls the oxygen concentration detection device to detect the oxygen concentration in the cavity.

[0008] In some optional embodiments, the driving mechanism includes a screw, a motor for driving the screw to rotate forward and reverse, a screw nut threadedly mounted on the screw, a connecting rod with the screw nut and a piston hinged at both ends, and at least one guide rod. The piston is connected to a sliding sleeve slidably mounted on the guide rod. When the screw nut moves along the screw, it drives the connecting rod to push the piston along the guide rod toward or away from the breathing interface. The photoelectric switch is connected to the connecting rod.

[0009] In some optional embodiments, a display screen electrically connected to the oxygen concentration detection device is further included, and the display screen is used to display the oxygen concentration detected by the oxygen concentration detection device.

[0010] In some optional embodiments, a vacuum pumping device connected to the test chamber is further included, and the vacuum pumping device is used to evacuate the test chamber to a preset pressure.

[0011] The present application also provides a mask oxygen concentration testing method, which is performed using the above-mentioned mask oxygen concentration testing device, comprising the following steps:

[0012] Connect the oxygen mask to the fixture;

[0013] Evacuate the test chamber to the preset pressure;

[0014] Deliver oxygen at a set flow rate to the cavity between the oxygen mask and the fixture;

[0015] Alternately inhale and exhale into the cavity at a set pressure and frequency;

[0016] The oxygen concentration detection device is controlled to detect the oxygen concentration in the cavity at the end of inhaling air from the cavity.

[0017] The beneficial effects of the present application are as follows: the mask oxygen concentration test device provided by the present application includes a test chamber, an oxygen cylinder, an oxygen supply device, and a fixture, a breathing simulation device, and an oxygen concentration detection device arranged in the test chamber; the fixture is used to detachably connect the oxygen mask so that a cavity is enclosed between the fixture and the oxygen mask; the fixture is provided with two breathing interfaces connected to the cavity; the breathing simulation device and the oxygen concentration detection device are respectively connected to the two breathing interfaces; the oxygen supply device is respectively connected to the oxygen cylinder and the oxygen mask; the oxygen supply device is used to deliver the oxygen in the oxygen cylinder to the cavity at a set flow rate; the breathing simulation device is used to alternately inhale from the cavity and exhale into the cavity at a set pressure and frequency; the oxygen concentration detection device is used to detect the oxygen concentration in the cavity at the exhalation end of the breathing simulation device. The mask oxygen concentration test device and method provided by the present application can comprehensively and accurately detect the oxygen concentration when breathing while wearing an oxygen mask. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the mask oxygen concentration test device provided in an embodiment of the present application when testing an oxygen mask;

[0020] Figure 2 This is a schematic diagram of the partial structure of the breathing simulation device in the mask oxygen concentration testing device provided in an embodiment of the present application.

[0021] In the figure: 100, test chamber; 110, oxygen cylinder; 120, oxygen supply device; 130, tooling fixture; 140, oxygen concentration detection device; 150, cavity; 160, breathing interface; 170, display screen; 180, vacuum device; 190, fixing belt; 200, oxygen mask; 300, breathing simulation device; 310, breathing simulation shell; 320, simulation cavity; 330, piston; 340, connection port; 350, photoelectric switch; 360, sensor sheet; 370, screw rod; 380, motor; 390, screw rod nut; 400, connecting rod; 410, guide rod; 420, sleeve; 430, bracket; 440, screw rod seat. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] The features and performance of the mask oxygen concentration testing device and method of the present application are further described in detail below in conjunction with the embodiments.

[0030] like Figure 1 and Figure 2As shown, the embodiment of the present application provides a mask oxygen concentration test device, which includes a test chamber 100, an oxygen cylinder 110, an oxygen supply device 120, and a fixture 130, a breathing simulation device 300 and an oxygen concentration detection device 140 arranged in the test chamber 100. The fixture 130 is used to detachably connect the oxygen mask 200 using a fixing belt 190 so that the fixture 130 and the oxygen mask 200 are enclosed to form a cavity 150. The fixture 130 is provided with two breathing interfaces 160 connected to the cavity 150. The breathing simulation device 300 and the oxygen concentration detection device 140 are respectively connected to the two breathing interfaces 160 through pipelines, and the oxygen supply device 120 is respectively connected to the oxygen cylinder 110 and the oxygen mask 200 through pipelines; the oxygen supply device 120 is used to transport the oxygen in the oxygen cylinder 110 to the cavity 150 at a set flow rate, and the breathing simulation device 300 is used to alternately inhale from the cavity 150 and exhale into the cavity 150 at a set pressure and frequency, and the oxygen concentration detection device 140 is used to detect the oxygen concentration in the cavity 150 at the exhalation end of the breathing simulation device 300.

[0031] Among them, the breathing simulation device 300 includes a breathing simulation shell 310 with a simulation chamber 320, a piston 330 movably arranged in the simulation chamber 320, and a driving mechanism for driving the piston 330 to reciprocate along the simulation chamber 320. A connecting port 340 connected to the simulation chamber 320 is provided on the top of the breathing simulation shell 310, and the connecting port 340 is connected to the breathing interface 160 through a pipeline; the driving mechanism includes a screw rod 370, a motor 380 for driving the screw rod 370 to rotate forward and reverse, a screw rod nut 390 threadedly sleeved on the screw rod 370, a connecting rod 400 and four guide rods 410 respectively hinged at both ends of the screw rod nut 390 and the piston 330, the piston 330 is connected to a sliding sleeve 420 respectively slidably sleeved on each guide rod 410, and the screw rod When the nut 390 moves along the screw rod 370, the connecting rod 400 drives the piston 330 to move along the guide rod 410 toward or away from the breathing interface 160. The connecting rod 400 is connected to the photoelectric switch 350. The bottom of the breathing simulation shell 310 is fixedly connected to the bracket 430. The top of the bracket 430 is connected to the sensor sheet 360. The photoelectric switch 350 is electrically connected to the oxygen concentration detection device 140. The motor 380 is fixedly connected to the bracket 430. The bracket 430 is connected to the screw rod seat 440. The screw rod 370 is rotatably connected to the screw rod seat 440. When the driving mechanism drives the piston 330 to move to the end away from the breathing interface 160, the photoelectric switch 350 senses the sensor sheet 360 and controls the oxygen concentration detection device 140 to detect the oxygen concentration in the cavity 150. The oxygen concentration detection device 140 is connected to the display screen 170 through a signal line. The display screen 170 is used to display the oxygen concentration detected by the oxygen concentration detection device 140. The test chamber 100 is connected to a vacuum pumping device 180 via a pipeline, and the vacuum pumping device 180 is used to evacuate the inside of the test chamber 100 to a preset pressure.

[0032] The embodiment of the present application also provides a mask oxygen concentration test method, which is performed using the above-mentioned mask oxygen concentration test device, and includes the following steps:

[0033] Step 1: Connect the oxygen mask 200 to the fixture 130 to form a cavity 150 between the fixture 130 and the oxygen mask 200, and connect the connection port 340 of the breathing simulation device 300 and the oxygen concentration detection device 140 to the two breathing interfaces 160 of the fixture 130 respectively;

[0034] Step 2: Use the vacuum device 180 to evacuate the test chamber 100 to a preset pressure;

[0035] Step 3: Use the oxygen supply device 120 to deliver the oxygen in the oxygen cylinder 110 to the cavity 150 formed between the oxygen mask 200 and the fixture 130 at a set flow rate;

[0036] Step 4: Control the breathing simulation device 300 to alternately inhale and exhale from the cavity 150 at a set pressure and frequency. Specifically, control the output shaft of the motor 380 to repeatedly rotate forward for a preset time and then reverse for a preset time, thereby driving the screw 370 to rotate forward and reversely, and then driving the screw nut 390 to reciprocate along the screw 370, thereby using the screw nut 390 to drive the hinged connecting rod 400 to reciprocate to drive the piston 330 to reciprocate along the guide rod 410 toward or away from the breathing interface 160, thereby using the piston 330 to periodically exhale air from the connecting port 340 through the breathing interface 160 into the cavity 150 or suck air out of the cavity 150 to simulate human breathing;

[0037] Step 5. When the driving mechanism drives the piston 330 to move to the end for inhalation away from the breathing interface 160, the photoelectric switch 350 senses the sensor sheet 360 and controls the oxygen concentration detection device 140 to detect the oxygen concentration in the cavity 150. The oxygen concentration detected by the oxygen concentration detection device 140 is output to the display screen 170 for display.

[0038] The mask oxygen concentration testing device and method provided in the embodiment of the present application are as follows: after adjusting the test chamber 100 to the required low-pressure test environment, the oxygen mask 200 is fixed to the fixture 130 and the two are enclosed to form a cavity 150 to simulate the occupant wearing the oxygen mask 200, and the two breathing interfaces 160 of the fixture 130 connected to the cavity 150 are respectively connected to the breathing simulation device 300 and the oxygen concentration detection device 140, the breathing simulation device 300 is used to simulate a certain lung tidal volume for breathing, and a photoelectric switch 350 is set in the breathing simulation device 300 to sense the sensor sheet 360 and cooperate with the exhalation end of the breathing simulation device 300 to control the oxygen concentration detection device 140 to detect the oxygen concentration, so as to comprehensively and accurately detect the oxygen concentration when breathing while wearing the oxygen mask.

[0039] The mask oxygen concentration testing device and method provided in the embodiment of the present application can be used to test the oxygen concentration of the respiratory end gas of the occupant's oxygen mask 200 at different altitudes, different lung simulated breathing volumes and different oxygen flow conditions, and has the advantages of simple and reliable equipment, high accuracy, high degree of automation, and accurate and comprehensive test results.

[0040] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A mask oxygen concentration testing device, characterized in that: It includes a test chamber, an oxygen cylinder, an oxygen supply device, and a jig, a breathing simulation device and an oxygen concentration detection device arranged in the test chamber. The jig is used to detachably connect the oxygen mask so that a cavity is enclosed between the jig and the oxygen mask. The jig is provided with two breathing interfaces connected to the cavity. The breathing simulation device and the oxygen concentration detection device are respectively connected to the two breathing interfaces. The oxygen supply device is respectively connected to the oxygen cylinder and the oxygen mask. The oxygen supply device is used to transport the oxygen in the oxygen cylinder to the cavity at a set flow rate. The breathing simulation device is used to alternately inhale from the cavity and exhale into the cavity at a set pressure and frequency. The oxygen concentration detection device is used to detect the oxygen concentration in the cavity at the exhalation end of the breathing simulation device.

2. The mask oxygen concentration testing device according to claim 1, characterized in that: The breathing simulation device includes a breathing simulation shell with a simulation cavity provided therein, a piston movably arranged in the simulation cavity, and a driving mechanism for driving the piston to reciprocate along the simulation cavity. The simulation cavity is connected to the breathing interface through a connecting port, and the driving mechanism and the breathing simulation shell are respectively connected to a photoelectric switch and a sensor sheet, and the photoelectric switch is electrically connected to the oxygen concentration detection device; when the driving mechanism drives the piston to move to one end away from the breathing interface, the photoelectric switch senses the sensor sheet and controls the oxygen concentration detection device to detect the oxygen concentration in the cavity.

3. The mask oxygen concentration testing device according to claim 2, characterized in that: The driving mechanism includes a screw, a motor for driving the screw to rotate forward and reverse, a screw nut threadedly mounted on the screw, a connecting rod and at least one guide rod respectively hinged at both ends of the screw nut and the piston, the piston is connected to a sliding sleeve slidably mounted on the guide rod, when the screw nut moves along the screw, it drives the connecting rod to push the piston along the guide rod toward or away from the breathing interface, and the photoelectric switch is connected to the connecting rod.

4. The mask oxygen concentration testing device according to claim 1, characterized in that: It also includes a display screen electrically connected to the oxygen concentration detection device, and the display screen is used to display the oxygen concentration detected by the oxygen concentration detection device.

5. The mask oxygen concentration testing device according to claim 1, characterized in that: It also includes a vacuum pumping device connected to the test chamber, and the vacuum pumping device is used to vacuum the test chamber to a preset pressure.

6. A mask oxygen concentration testing method, characterized in that: The method is carried out using a mask oxygen concentration test device as described in any one of claims 1 to 5, comprising the following steps: Connect the oxygen mask to the fixture; The test chamber is evacuated to a preset pressure; Deliver oxygen at a set flow rate to the cavity between the oxygen mask and the fixture; alternately inhaling air from the cavity and exhaling air into the cavity at a set pressure and frequency; The oxygen concentration detection device is controlled to detect the oxygen concentration in the cavity at the end of inhaling air from the cavity.

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