Respiratory capacity checking device for comprehensive detector of respirator
By designing a breathing volume verification device, using components such as expiratory check valves, inhalation check valves and airbags, the problem of inconvenience of self-calibration of the respirator detector is solved, and efficient and accurate self-calibration is achieved to ensure the stability and accuracy of the detector.
Patent Information
- Application Number
- CN202422622703.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The existing comprehensive respirator detector lacks convenient self-checking methods during use, which makes it difficult to ensure the stability and accuracy of the test and the failure to detect equipment performance degradation in time.
A breathing air volume verification device is designed. By setting up components such as exhalation check valves, inhalation check valves, airbags and solenoid valves, the unstable airflow is converted into a stable airflow suitable for flow tests, and the exhalation gas is buffered through the airbag to reduce errors, and only the exhaled air volume is measured, and the airflow direction is controlled using a solenoid valve.
It improves the convenience of self-checking and the accuracy of testing, ensures that the detector maintains stable testing capabilities within one year, reduces test errors, and avoids interference from the inhaled airflow on the measurement results.
Smart Images
Figure CN223216933U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a breathing volume verification device of a comprehensive respirator detector, belonging to the calibration field of special equipment inspection devices. Background Art
[0002] The comprehensive respirator tester has a function of simulating human breathing (simulating artificial lungs). The breathing volume set in the tester has been adjusted, confirmed and calibrated by the upper-level metrology department before leaving the factory. However, as the main testing instrument in the respirator testing industry, it is an important testing instrument with a high frequency of use. Therefore, the testing capability of various parameters of the tester needs to be well maintained, which is the stability in metrology.
[0003] Furthermore, from a normal calibration cycle perspective, factory calibration is only performed once, at the time of shipment. Unless there are major faults later, equipment users generally won't return the equipment for calibration. Therefore, this calibration is only a basic factory calibration, making it inconvenient for users to perform later. Calibration by the higher-level metrology department also has a fixed calibration cycle, typically one year, which users must perform to ensure the stability of their testing instruments.
[0004] In order to ensure high testing capabilities at any time within one year, users are required to conduct planned and periodic self-calibration within one year. Through this self-calibration, it is possible to promptly discover whether the equipment maintains its testing capabilities. If problems arise, timely measures can be taken (return to the factory or send to the next-level metrology department for calibration), thereby ensuring the testing capabilities and level of the testing organization.
[0005] Therefore, this verification device is designed and manufactured. Utility Model Content
[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a respiratory volume verification device for a comprehensive respirator detector, which allows the user to perform self-calibration, thereby ensuring the performance of the detector.
[0007] The breathing gas volume verification device of the respirator comprehensive detector described in the utility model includes a gas volume test pipeline, one end of the gas volume test pipeline is an external machine interface, and the other end is a gas outlet, an exhalation one-way valve is provided at the end of the gas volume test pipeline close to the external machine interface, an inhalation port is provided between the exhalation one-way valve and the external machine interface, and an inhalation one-way valve is provided at the inhalation port; a flow meter is provided at the end of the gas volume test pipeline close to the gas outlet, and an air bag is provided on the gas volume test pipeline before the flow meter.
[0008] The volume of air consumed during breathing includes the volume required for a single exhalation or inhalation. This verification device verifies the volume of air consumed during exhalation, with exhaled air serving as the primary test subject. Respiratory airflow differs from normal test flow, which is a continuous, fluctuating flow with directionality. This means the airflow through the flow meter is unidirectional, while the airflow during inhalation and exhalation is in opposite directions. If the forward direction is positive and the reverse direction is negative, then, since breathing has a stable respiratory rate, if the flow meter is directly connected to the pipeline, the measured value will rapidly switch between positive and negative. Since the flow meter also captures data at a certain frequency, capturing data that fluctuates significantly over a short period of time can result in significant error. Therefore, this verification device is designed to convert unstable airflow into a stable flow suitable for acquisition by the flow meter, reducing errors and measuring only the exhaled air volume. It uses two one-way valves, with the inlet directly drawing in air and the exhaled air connected to the subsequent pipeline for flow acquisition.
[0009] Due to the large volume of exhaled gas and the short duration of exhalation, the flowmeter's diameter is smaller than the inner diameter of the exhalation tube due to accuracy issues. This causes breath holding during exhalation, with some gas compressed in the trachea and not passing through the flowmeter. Consequently, the exhaled gas cannot be fully exhaled and pass through the flowmeter, resulting in low test data. Therefore, an air bag is connected in parallel in front of the flowmeter to act as a buffer. When the detector inhales, the air pump in the verification device slowly pumps the gas in the bag into the flowmeter for measurement.
[0010] A solenoid valve is provided on the gas volume test pipeline preceding the airbag, and a pressure controller is provided between the solenoid valve and the exhalation one-way valve. The pressure controller is electrically connected to the solenoid valve to provide feedback control over the solenoid valve. The pressure controller is used to control the solenoid valve. When the pressure in the pipeline increases during exhalation, the pressure controller outputs a signal to control the solenoid valve to open, allowing gas to flow through, and closes during inhalation. The solenoid valve opens during exhalation and closes during inhalation in response to breathing movements. When inhaling, the detector is used to block the exhalation pipeline to prevent the gas in the airbag from entering the left pipeline, which would cause the test data to be smaller and introduce errors.
[0011] A flow regulating valve is provided on the gas volume test pipeline between the air bag and the flow meter to adjust the flow of the exhalation pipeline to achieve a measurable amount within the accuracy range of the flow meter.
[0012] Preferably, the flow regulating valve is a manual ball valve.
[0013] The gas flow test line is located within the box, with the external unit interface and gas outlet located at either end. The flow meter display is mounted on the box. The entire line is designed to connect within the box, with the inlet on the left side connected to the respirator integrated tester via a hose. The outlet on the right side directly vents to the atmosphere.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] The respiratory volume verification device for the comprehensive respirator detector described in the present invention improves the convenience of self-calibration: the verification device allows users of the comprehensive respirator detector to perform self-calibration without returning to the factory, which greatly improves the convenience of calibration. Users can perform calibration in a planned and periodic manner within one year as needed to ensure that the detector always maintains its testing capabilities. Enhanced test accuracy and stability: by designing an exhalation one-way valve and an inhalation one-way valve, as well as components such as an air bag and a solenoid valve, the verification device can convert unstable airflow into a stable airflow suitable for collection by a flow test device, thereby reducing test errors. At the same time, only the exhaled air volume is measured, avoiding the interference of the airflow during inhalation on the test results. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural principle diagram of the present utility model.
[0017] In the figure: 1. External unit interface; 2. Inhalation port; 3. Inhalation check valve; 4. Exhalation check valve; 5. Pressure controller; 6. Solenoid valve; 7. Gas volume test line; 8. Air bag; 9. Flow regulating valve; 10. Flow meter; 11. Gas outlet; 12. Box. DETAILED DESCRIPTION
[0018] The present invention will be further described below with reference to specific embodiments.
[0019] However, the description of the present invention is merely an embodiment of structural and even functional description, and the scope of rights of the present invention is not limited by the embodiments described herein.
[0020] For example, multiple embodiments may have various modifications and various forms, and it should be understood that the scope of rights of the present invention includes equivalents that can implement the technical idea.
[0021] like Figure 1 As shown, this embodiment is implemented through the following technical solutions: it includes a gas volume test pipeline 7, one end of which is an external unit interface 1 and the other end is a gas outlet 11. The gas volume test pipeline 7 is located in a box 12, with the external unit interface 1 and the gas outlet 11 respectively provided at both ends of the box 12. The display screen of the flow meter 10 is provided on the box 12. An exhalation check valve 4 is provided at the end of the gas volume test pipeline 7 near the external unit interface 1, an inhalation port 2 is provided between the exhalation check valve 4 and the external unit interface 1, and an inhalation check valve 3 is provided at the inhalation port 2. A flow meter 10 is provided at the end of the gas volume test pipeline 7 near the gas outlet 11, and an air bag 8 is provided on the gas volume test pipeline 7 before the flow meter 10.
[0022] A solenoid valve 6 is installed on the gas volume test line 7 before the airbag 8. A pressure controller 5 is installed between the solenoid valve 6 and the exhalation check valve 4. The pressure controller 5 is electrically connected to the solenoid valve 6 and provides feedback control of the solenoid valve 6. A flow control valve 9 is installed on the gas volume test line 7 between the airbag 8 and the flow meter 10. In this embodiment, the flow control valve 9 is a manual ball valve.
[0023] The utility model can convert unstable airflow into stable airflow suitable for collection by flow test device, reduce errors, and only measure the exhaled gas volume. Two one-way valves are used, and the air intake directly inhales air, and the exhaled gas is connected to the subsequent pipeline for flow collection. Since the amount of exhaled gas is large and the time is short, the flow meter has a smaller diameter than the inner diameter of the exhalation pipeline due to accuracy issues. There is a breath-holding phenomenon during exhalation, and part of the gas volume is compressed in the trachea and does not pass through the flow meter. The exhaled gas cannot be completely exhaled and pass through the flow meter, resulting in small test data. Therefore, an air bag is connected in parallel in front of the flow meter for buffering. When the detector inhales, the air pump of the verification device slowly pumps the gas in the air bag into the flow meter for measurement.
[0024] Of course, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equivalent changes and improvements made by ordinary technicians in this technical field within the essential scope of the present invention should all fall within the scope of the patent of the present invention.
Claims
1. A breathing volume verification device for a comprehensive respirator detector, characterized in that: The invention comprises a gas volume test pipeline (7), one end of the gas volume test pipeline (7) is an external machine interface (1), and the other end is a gas outlet (11); an exhalation check valve (4) is provided at the end of the gas volume test pipeline (7) close to the external machine interface (1); an inhalation port (2) is provided between the exhalation check valve (4) and the external machine interface (1); and an inhalation check valve (3) is provided at the inhalation port (2); a flow meter (10) is provided at the end of the gas volume test pipeline (7) close to the gas outlet (11), and an air bag (8) is provided on the gas volume test pipeline (7) before the flow meter (10).
2. The respiratory volume verification device of the comprehensive respirator detector according to claim 1, characterized in that: A solenoid valve (6) is provided on the gas volume test pipeline (7) before the air bag (8), and a pressure controller (5) is provided between the solenoid valve (6) and the exhalation one-way valve (4). The pressure controller (5) is electrically connected to the solenoid valve (6) to perform feedback control on the solenoid valve (6).
3. The respiratory volume verification device of the comprehensive respirator detector according to claim 1, characterized in that: A flow regulating valve (9) is provided on the gas volume test pipeline (7) between the air bag (8) and the flow meter (10).
4. The respiratory volume verification device of the comprehensive respirator detector according to claim 3, characterized in that: The flow regulating valve (9) is a manual ball valve.
5. The respiratory volume verification device of the comprehensive respirator detector according to claim 1, characterized in that: The gas volume test pipeline (7) is located in the box (12), the external machine interface (1) and the gas outlet (11) are respectively arranged at two ends of the box (12), and the display screen of the flow meter (10) is arranged on the box (12).