CN116026555A - Respiration/blowing air flow resistance testing device - Google Patents

Respiration/blowing air flow resistance testing device Download PDF

Info

Publication number
CN116026555A
CN116026555A CN202310018170.1A CN202310018170A CN116026555A CN 116026555 A CN116026555 A CN 116026555A CN 202310018170 A CN202310018170 A CN 202310018170A CN 116026555 A CN116026555 A CN 116026555A
Authority
CN
China
Prior art keywords
test
cabinet
head die
resistance
resistance testing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310018170.1A
Other languages
Chinese (zh)
Inventor
张浚
张芝星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENZHEN INTERTEK QUALITY TECHNOLOGY SERVICE CO LTD
Original Assignee
SHENZHEN INTERTEK QUALITY TECHNOLOGY SERVICE CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENZHEN INTERTEK QUALITY TECHNOLOGY SERVICE CO LTD filed Critical SHENZHEN INTERTEK QUALITY TECHNOLOGY SERVICE CO LTD
Priority to CN202310018170.1A priority Critical patent/CN116026555A/en
Publication of CN116026555A publication Critical patent/CN116026555A/en
Pending legal-status Critical Current

Links

Images

Abstract

The application provides a breath/insufflation flow resistance testing device comprising: the device comprises a control module, a test module and a cabinet; the test module comprises: the device comprises a servo motor, an air cylinder, a head die and a float flowmeter; the float flowmeter is positioned on a side panel of the cabinet; the servo motor is electrically connected with the cylinder; the air cylinder is communicated with the head die and the float flowmeter, and a channel for communicating the air cylinder with the head die and the float flowmeter is a Y-shaped pipeline. According to the method, the standard head die is adopted, the breathing resistance of the head die is tested before testing, the initial breathing resistance is corrected, meanwhile, the external air source is used, the air source is generated by the air source through the self-contained air cylinder, the problems that the existing equipment is poor in compatibility, two functions of breathing testing and blowing testing cannot be achieved at the same time, the testing result is inaccurate and the like are solved, the measuring result is more accurate, and the testing function is more extensive.

Description

Respiration/blowing air flow resistance testing device
Technical Field
The application relates to the field of airflow resistance testing, in particular to a respiratory/blowing airflow resistance testing device.
Background
Breathing tubes are devices that allow the diver's face to remain in the water and still breathe. The respiratory tube is required to have three aspects of delivery inspection, inspection before use in terms of detection. If the breathing tube is not detected, once the technical parameters are changed and the requirements are not met, the diving and escape effects are greatly reduced, and even the life of a user is endangered.
Most of the existing detection equipment can only test respiratory test or blowing test, cannot have two functions at the same time, has deviation from the actual use state during the test through the direct connection test of the air cylinder and the respiratory tube, cannot be compatible with all products, and the instrument itself can also generate respiratory resistance during the test, thereby having a certain influence on the test result.
Disclosure of Invention
In view of the problem, the present application has been developed to provide a respiratory/insufflation airflow resistance testing device that overcomes or at least partially solves the problem, comprising:
a respiratory/insufflation airflow resistance testing device comprising: the device comprises a control module, a test module and a cabinet; the control module is electrically connected with the test module; the cabinet comprises an upper cabinet and a lower cabinet;
the test module comprises: the device comprises a servo motor, an air cylinder, a head die and a float flowmeter; the servo motor and the air cylinder are arranged in the lower cabinet; the head die is arranged on the surface of the lower cabinet;
the float flowmeter is positioned on a side panel of the cabinet; the servo motor is electrically connected with the cylinder; the air cylinder is communicated with the head die and the float flowmeter, and a channel for communicating the air cylinder with the head die and the float flowmeter is a Y-shaped pipeline.
Preferably, the control module includes: the device comprises a touch screen, a scram button, a buzzer, a starting button and a power switch; the components of the control module are all located on the same side panel of the upper cabinet.
Preferably, electric ball valves are respectively arranged between the bifurcation of the Y-shaped pipeline and the air cylinder as well as between the Y-shaped pipeline and the float flowmeter; the electric ball valve is electrically connected with the control module.
Preferably, the test module further comprises: a pressure relief valve, a duplex member, and a hand slide valve; the pressure relief valve, the duplex member, and the hand slide valve are located within the upper cabinet; the float flowmeter is sequentially communicated with the pressure reducing valve, the duplex member and the hand slide valve;
when the test type is in the blowing resistance test, the hand slide valve is communicated with an external air source.
Preferably, the duplex member includes: a filter, a pressure regulator and an oil mist device; the filter, the pressure regulator and the oil mist device are sequentially communicated; the pressure regulator is communicated with the hand slide valve; the oiler is in communication with the float flow meter.
Preferably, the head mould is provided with a respirator and a pressure sensor; the respirator is arranged at the mouth and nose of the head die, and the pressure sensor is arranged in the head die; the pressure sensor is electrically connected with the control module.
Preferably, the head model is changed according to the target crowd of the sample to be tested.
Preferably, casters and foot cups are arranged below the cabinet.
A breath/blow air flow resistance testing method applied to any of the above air flow resistance testing devices, comprising:
installing a corresponding head die according to a target crowd of a sample to be detected;
the starting device is used for measuring respiratory resistance generated by equipment and the respiratory tract of the head mould and inputting the measured respiratory resistance into the original peak value of the device;
selecting a test type, and setting a test frequency, a cycle number and an upper limit value and a lower limit value of an alarm;
mounting the sample to be tested on the head die;
when the test result exceeds the set upper and lower alarm limit values, the device gives an alarm;
and if no alarm exists and the device runs normally, directly reading the peak value result of the test resistance.
Preferably, the test types include a breath resistance test and a blow resistance; the test device changes the test type by changing the air source.
Preferably, when the test type is selected as the breath resistance test, the air source is a cylinder of the device.
Preferably, when the test type is selected as the blowing resistance test, the air source is an external air source.
The application has the following advantages:
in the embodiment of the application, for the compatibility among the prior art poor, can't possess simultaneously breathing test and two kinds of functions of blowing test and the inaccurate scheduling problem of test result, this application provides a breathe/blowing air current resistance testing arrangement, specifically includes: the device comprises a control module, a test module and a cabinet; the control module is electrically connected with the test module; the cabinet comprises an upper cabinet and a lower cabinet; the test module comprises: the device comprises a servo motor, an air cylinder, a head die and a float flowmeter; the servo motor and the air cylinder are arranged in the lower cabinet; the head die is arranged on the surface of the lower cabinet; the float flowmeter is positioned on a side panel of the cabinet; the servo motor is electrically connected with the cylinder; the air cylinder is communicated with the head die and the float flowmeter, and a channel for communicating the air cylinder with the head die and the float flowmeter is a Y-shaped pipeline. Through adopting the head mould of standard regulation to test the breathing resistance of head mould itself earlier before the test, revise initial breathing resistance, simultaneously, use external air supply and from taking the cylinder to produce the air supply mode, solved that current equipment compatibility is poor, can't possess two kinds of functions of breathing test and blowing test simultaneously and test result inaccurate scheduling problem, reached measuring result more accurate, the effect that test function is more extensive.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description of the present application will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a respiratory/insufflation flow resistance testing device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a respiratory/insufflation flow resistance testing device according to an embodiment of the present disclosure;
fig. 3 is a flowchart illustrating steps of a method for testing resistance to respiratory/blowing air flow according to an embodiment of the present application.
Reference numerals in the drawings of the specification are as follows: 1. a float flow meter; 2. a voltage regulator; 3. a head mold; 4. a respirator; 5. a touch screen; 6. an emergency stop button; 7. a buzzer; 8. a start button; 9. a power switch; 10. a frame; 11. a cylinder; 12. a servo motor; 13. casters; 14. a sample to be tested; 15. a pressure sensor; 16. an electric ball valve; 17. a pressure reducing valve; 18. an oil mist device; 19. a filter; 20. a hand slide valve; 21. and (5) externally connecting an air source.
Detailed Description
In order to make the objects, features and advantages of the present application more comprehensible, the present application is described in further detail below with reference to the accompanying drawings and detailed description. It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The inventors found by analyzing the prior art that: most of the existing detection equipment adopts an air cylinder to connect with the breathing tube for testing, the connection between the detection equipment and the breathing tube is not tight enough during testing, and the state of the breathing tube in actual use cannot be simulated, and the test result can be influenced if the breathing tube is bent. Meanwhile, most of the existing detection devices are directly connected with the breathing tube through the barometer for testing, and therefore products on the market are more in variety, cannot be suitable for all products, are poor in compatibility, and can generate airflow resistance, the results are affected to a certain extent during testing, and the influence on the test results can lead to the problem that the test results are inaccurate.
Referring to fig. 1-2, there is shown a breath/insufflation flow resistance testing device provided in an embodiment of the present application, comprising: the device comprises a control module, a test module and a cabinet; the control module is electrically connected with the test module; the cabinet comprises an upper cabinet and a lower cabinet;
the test module comprises: a servo motor 12, an air cylinder 11, a head die 3 and a float flowmeter 1; the servo motor 12 and the cylinder 11 are arranged in the lower cabinet; the head die 3 is arranged on the surface of the lower cabinet; the float flowmeter 1 is positioned on a side panel of the cabinet; the servo motor 12 is electrically connected with the cylinder 11; the air cylinder 11 is communicated with the head die 3 and the float flowmeter 1, and a channel for communicating the air cylinder 11 with the head die 3 and the float flowmeter 1 is a Y-shaped pipeline.
In the embodiment of the application, for the compatibility among the prior art poor, can't possess simultaneously breathing test and two kinds of functions of blowing test and the inaccurate scheduling problem of test result, this application provides a breathe/blowing air current resistance testing arrangement, specifically includes: the device comprises a control module, a test module and a cabinet; the control module is electrically connected with the test module; the cabinet comprises an upper cabinet and a lower cabinet; the test module comprises: a servo motor 12, an air cylinder 11, a head die 3 and a float flowmeter 1; the servo motor 12 and the cylinder 11 are arranged in the lower cabinet; the head die 3 is arranged on the surface of the lower cabinet; the float flowmeter 1 is positioned on a side panel of the cabinet; the servo motor 12 is electrically connected with the cylinder 11; the air cylinder 11 is communicated with the head die 3 and the float flowmeter 1, and a channel for communicating the air cylinder 11 with the head die 3 and the float flowmeter 1 is a Y-shaped pipeline. Through adopting the head mould 3 of standard regulation to test the breathing resistance of head mould 3 itself earlier before the test, revise initial breathing resistance, simultaneously, use external air supply 21 and from taking cylinder 11 to produce the air supply mode, solved that current equipment compatibility is poor, can't possess two kinds of functions of breathing test and blowing test simultaneously and test result inaccurate scheduling problem, reached measuring result more accurate, the effect that test function is more extensive.
Next, a breath/blow air flow resistance test device in the present exemplary embodiment will be further described.
In an embodiment of the present application, the control module includes: the touch screen 5, the scram button 6, the buzzer 7, the start button 8 and the power switch 9; the components of the control module are all located on the same side panel of the upper cabinet. The touch screen 5 can select the test type, set the test frequency, the cycle number and the upper and lower limit values of the alarm, and after the setting is completed, the start button 8 is pressed to start the test; when the test result exceeds the set alarm upper and lower limit values, the buzzer 7 gives an alarm, and the scram button 6 is pressed to terminate the test.
In an embodiment of the present application, an electric ball valve 16 is respectively arranged between the bifurcation of the Y-shaped pipeline and the cylinder 11 and the float flowmeter 1; the electrically operated ball valve 16 is electrically connected to the control module. The control module controls the test type through the motorized ball valve 16; when the test type is a breath test, the electrically operated ball valve 16 adjacent to the cylinder 11 is opened, and the electrically operated ball valve 16 adjacent to the float flowmeter 1 is closed; when the test type is a blow test, the electrically operated ball valve 16 adjacent to the air cylinder 11 is closed and the electrically operated ball valve 16 adjacent to the float flowmeter 1 is opened.
The float flowmeter 1 is used for measuring the pressure in a pipe line for performing a blowing test.
In an embodiment of the present application, the test module further includes: relief valve 17, duplex and hand slide valve 20; the pressure relief valve 17, the duplex member and the hand slide valve 20 are located within the upper cabinet; the float flowmeter 1 is in communication with the pressure reducing valve 17, the duplex member, and the hand slide valve 20 in sequence; the pressure reducing valve 17 can stabilize the pressure of the air source, so that the air source is in a constant state, and the damage to hardware such as a valve and the like caused by sudden change of the air pressure of the air source is reduced;
when the test type is in the blowing resistance test, the hand slide valve 20 is in communication with an external air source 21. The hand slide valve 20 acts as a gas source switch in the line and when the gas source is off, the gas pressure in the line will be vented.
In one embodiment of the present application, the duplex member includes: a filter 19, a pressure regulator 2 and an oiler 18; the filter 19, the pressure regulator 2 and the oil mist device 18 are communicated in sequence; the pressure regulator 2 is communicated with the hand slide valve 20; the oil mist device 18 communicates with the float flowmeter 1. The filter 19 is used for cleaning the air source, and can filter moisture in the compressed air to prevent the moisture from entering the device along with the air. The pressure regulating valve can limit the highest pressure in the pipeline, and the economical efficiency and the safety of the system guarantee are improved on the premise of ensuring the reliable operation of the system. The oil mist device 18 can lubricate the moving parts of the machine body, lubricate the parts inconvenient to be lubricated, and prolong the service life of the device.
In an embodiment of the present application, the head mold 3 is provided with a respirator 4 and a pressure sensor 15; the respirator 4 is arranged at the mouth and nose of the head die 3, and the pressure sensor 15 is arranged in the head die 3; the pressure sensor 15 is electrically connected to the control module. Wherein the pressure sensor 15 can measure respiratory resistance in the range of 0.01kPa to 50kPa. The head mould 3 can simulate the breathing of a real person by the respirator 4 and the breathing resistance is measured by the pressure sensor 15.
In an embodiment of the present application, the style of the head mold 3 is changed according to the target crowd of the sample 14 to be tested; the head model 3 adopts European adult and child dummy head models 3 specified by standards to simulate actual use conditions, and can aim at breathing tubes of different types and sizes.
In one embodiment of the present application, casters 13 and a foot cup are provided below the cabinet. The height of the castor 13 is higher than the foot cup, and the castor 13 can be folded when the test device does not need to be moved, and the foot cup is used for supporting the test device.
Referring to fig. 3, there is shown a breath/blow air flow resistance testing method applied to the air flow resistance testing device according to any one of the above embodiments, including:
s310, installing a corresponding head model 3 according to a target crowd of a sample 14 to be tested;
s320, starting a device, measuring respiratory resistance generated by equipment and the respiratory tract of the head mould 3, and inputting the measured respiratory resistance into an original peak value of the device;
s330, selecting a test type, and setting a test frequency, a cycle number and upper and lower limit values of an alarm;
s340, mounting the sample 14 to be tested on the head die 3;
s350, when the test result exceeds the set upper and lower alarm limit values, the device gives an alarm;
s360, if no alarm exists and the device runs normally, the test resistance peak value result is directly read.
As described in the step S310, the corresponding head model 3 is installed according to the target crowd of the sample 14 to be tested.
Installing a corresponding head die 3 according to a target crowd of a sample 14 to be detected; the head model 3 adopts European adult and child dummy head models 3 specified by standards to simulate actual use conditions, and can aim at breathing tubes of different types and sizes.
As described in the step S320, the device is started, the respiratory resistance generated by the apparatus itself and the respiratory tract of the head mold 3 is measured, and the measured respiratory resistance is input into the device' S original peak value.
By inputting the measured respiratory resistance on the touch screen 5, the testing device will automatically correct the resistance value generated by the instrument itself.
As described in the step S330, a test type is selected, and a test frequency, a cycle number, and upper and lower limits of the alarm are set.
The test type comprises a breathing air resistance test and a blowing resistance; the testing device changes the testing type by changing an air source; the test frequency may be a breathing frequency or an insufflation frequency, wherein the insufflation frequency may be 0; when the blow frequency is 0, a continuous blow test will be performed.
The sample 14 to be measured is mounted on the head die 3 as described in the step S340.
The sample 14 to be tested is connected with the respirator 4 of the head mould 3.
As shown in the step S350, when the test result exceeds the set alarm upper and lower limit values, the device will send an alarm.
When the test result exceeds the set alarm upper and lower limit values, the buzzer 7 sounds an alarm to remind an operator, the touch screen 5 also generates an alarm prompt, and the operator can stop the test by pressing the scram button 6.
If no alarm is given and the device is operating normally, the peak test resistance result is directly read as in step S360.
If the testing device does not give an alarm and the normal operation is finished, the operator can see the result of the peak test resistance on the touch screen 5.
In one embodiment of the present application, the specific procedure of "the test apparatus changes the test type by changing the air source" may be further described in conjunction with the following description.
When the test type is selected as the breath resistance test, the air source is an air cylinder 11 of the device.
When the test type is selected as the blowing resistance test, the air source is an external air source 21.
While preferred embodiments of the present embodiments have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the present application.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
The above description has been made in detail for a respiratory/blowing air flow resistance testing device provided in the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, the above examples are only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims (12)

1. A respiratory/insufflation airflow resistance testing device, comprising: the device comprises a control module, a test module and a cabinet; the control module is electrically connected with the test module; the cabinet comprises an upper cabinet and a lower cabinet;
the test module comprises: the device comprises a servo motor, an air cylinder, a head die and a float flowmeter; the servo motor and the air cylinder are arranged in the lower cabinet; the head die is arranged on the surface of the lower cabinet;
the float flowmeter is positioned on a side panel of the cabinet; the servo motor is electrically connected with the cylinder; the air cylinder is communicated with the head die and the float flowmeter, and a channel for communicating the air cylinder with the head die and the float flowmeter is a Y-shaped pipeline.
2. The airflow resistance testing device of claim 1, wherein the control module comprises: the device comprises a touch screen, a scram button, a buzzer, a starting button and a power switch; the components of the control module are all located on the same side panel of the upper cabinet.
3. The airflow resistance testing device according to claim 1, wherein electric ball valves are respectively arranged between the bifurcation of the Y-shaped pipeline and the air cylinder and the float flowmeter;
the electric ball valve is electrically connected with the control module.
4. The airflow resistance testing device of claim 1, wherein the testing module further comprises: a pressure relief valve, a duplex member, and a hand slide valve; the pressure relief valve, the duplex member, and the hand slide valve are located within the upper cabinet; the float flowmeter is sequentially communicated with the pressure reducing valve, the duplex member and the hand slide valve;
when the test type is in the blowing resistance test, the hand slide valve is communicated with an external air source.
5. The airflow resistance testing device of claim 4, wherein said duplex member comprises: a filter, a pressure regulator and an oil mist device; the filter, the pressure regulator and the oil mist device are sequentially communicated; the pressure regulator is communicated with the hand slide valve; the oiler is in communication with the float flow meter.
6. The airflow resistance testing device according to claim 1, wherein the head die is provided with a respirator and a pressure sensor; the respirator is arranged at the mouth and nose of the head die, and the pressure sensor is arranged in the head die; the pressure sensor is electrically connected with the control module.
7. The airflow resistance testing device according to claim 1, wherein the head model is changed according to the target population of the sample to be tested.
8. The airflow resistance testing device according to claim 1, wherein casters and foot cups are provided below the cabinet.
9. A breath/blow air flow resistance testing method applied to the air flow resistance testing device according to any one of claims 1 to 8, comprising:
installing a corresponding head die according to a target crowd of a sample to be detected;
the starting device is used for measuring respiratory resistance generated by equipment and the respiratory tract of the head mould and inputting the measured respiratory resistance into the original peak value of the device;
selecting a test type, and setting a test frequency, a cycle number and an upper limit value and a lower limit value of an alarm;
mounting the sample to be tested on the head die;
when the test result exceeds the set upper and lower alarm limit values, the device gives an alarm;
and if no alarm exists and the device runs normally, directly reading the peak value result of the test resistance.
10. The airflow resistance testing method according to claim 9, wherein the test types include a breath resistance test and a blow resistance; the test device changes the test type by changing the air source.
11. The method of claim 10, wherein the air source is a cylinder on-board the device when the test type is selected as the breath air resistance test.
12. The method of claim 10, wherein the air source is an external air source when the test type is selected as the blowing resistance test.
CN202310018170.1A 2023-01-06 2023-01-06 Respiration/blowing air flow resistance testing device Pending CN116026555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310018170.1A CN116026555A (en) 2023-01-06 2023-01-06 Respiration/blowing air flow resistance testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310018170.1A CN116026555A (en) 2023-01-06 2023-01-06 Respiration/blowing air flow resistance testing device

Publications (1)

Publication Number Publication Date
CN116026555A true CN116026555A (en) 2023-04-28

Family

ID=86090925

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310018170.1A Pending CN116026555A (en) 2023-01-06 2023-01-06 Respiration/blowing air flow resistance testing device

Country Status (1)

Country Link
CN (1) CN116026555A (en)

Similar Documents

Publication Publication Date Title
EP2106818B1 (en) System for compensating for pressure drop in a breathing assistance system
US20210022643A1 (en) Method and apparatus for measuring airway resistance and lung compliance
SE503155C2 (en) Methods and apparatus for functional control of breathing apparatus
CN110379252B (en) Vocal music breath exercise device and method
CN219573447U (en) Respiration/blowing air flow resistance testing device
JP6948643B2 (en) Pulmonary function test device
CN116026555A (en) Respiration/blowing air flow resistance testing device
CN106669110A (en) Multifunctional breath training device
US2792828A (en) Apparatus for determining metabolic rates
CN109745604A (en) Mask and pipeline fall off recognition methods
CN212872122U (en) Mask breathing resistance tester
CN115944820B (en) Control method and device for accurately quantifying respirator parameters
CN114983781B (en) Measuring method for real-time dynamic pressure monitoring during pressurization of pressure air sleeve
CN110646148A (en) Respirator check out test set and respirator detecting system
CN110926724A (en) Insulating glove air tightness detector and using method thereof
RU207673U1 (en) Stand for imitation of human external respiration, intended for testing personal protective equipment of the human respiratory system
CN101318048B (en) Automatic correction method for reverse connection of flow transducer of anesthesia apparatus and anesthesia apparatus thereof
CN114358845A (en) Processing method and system for detecting running state of oxygen inhalation equipment
CN216746823U (en) Mouth moves toy tester
CN117906989A (en) Respiratory resistance tester for floating and diving respiratory tube and testing method thereof
CN208985501U (en) A kind of first-aid skills simulated training model
CN217132895U (en) Mask sealing performance detection device
CN213689459U (en) Gas supply reminding device of gas odorous agent on-line monitoring equipment
CN215651107U (en) End-expiratory carbon dioxide simulator
RU206156U1 (en) "Borey" universal mobile unit for continuous air flow

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination