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Flow control module capable of automatically correcting valve opening

A valve opening and flow control technology, applied in the direction of respirators, etc., can solve the problems of large volume, unacceptable and popularized use in hospitals, and low control accuracy

Active Publication Date: 2015-09-16
XIAN WINZISS MEDICAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, buoy-type oxygen inhalers (float flowmeters) are still commonly used in domestic hospitals. The advantages are simple structure, low cost and durability, but its disadvantages are also obvious. It is generally inconvenient to adjust the flow rate (manual adjustment knob, unstable buoy drift) , Large measurement error (caused by changes in air supply pressure), data cannot be stored, etc.
The clinical application of the buoy type oxygen inhaler has not been updated for decades, which seriously deviates from the rapid development of medical instruments in recent years, and the trend of electronic and intelligentization of medical instruments. The reason is that the electronic flow rate of the core component of the intelligent oxygen inhaler Control valves and flow sensors have high precision requirements (the national industry standard YY1107-2003 requires the flow error not to exceed 4%), while the electronic flow control valves and flow sensors that have been on the market are large in size, high in price, and low in control accuracy. Electronic flow control valves that meet the requirements are more expensive and cannot meet the actual production needs of intelligent oxygen inhalers. Therefore, many technical solutions cannot be implemented in actual production, or after implementation, the hospital cannot accept and promote them because of the high price of the products.

Method used

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  • Flow control module capable of automatically correcting valve opening
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Embodiment one: the example of the digitally controlled oxygen inhaler prepared by the present invention

[0021] Since the calculation of technical parameters such as valve opening and flow coefficient is relatively complicated, in order to illustrate simple and intuitive examples, this embodiment uses a valve whose flow characteristic is a linear structural characteristic as an example. The linear characteristic refers to the relative flow and relative opening of the valve. The degree is in a linear relationship, that is, the time constant of the flow rate change caused by the change of the unit opening degree. The relative throttling area of ​​the valve is in a linear relationship with the relative opening; determine the calculated flow rate Qλmax=10L / min, Qmin=0.1L / min;

[0022] Valve opening and flow magnification M are shown in Table 1:

[0023] Table 1 Magnification M

[0024] opening

10％

20％

30％

40％

50％

60％

70％

80％ ...

Embodiment 2

[0037] Embodiment two: main technical parameter setting in the numerically controlled oxygen inhaler control unit (1) prepared by the present invention

[0038] In the numerically controlled oxygen inhaler (A) control unit (1) prepared in Example 1, the technical parameters are respectively set in the following manner, and the setting equipment includes: 0MPa~0.6MPa adjustable pressure gauge (B), with an accuracy of 2.5 grades; standard Flow meter (C), precision grade 1; oxygen source, terminal air supply pressure not less than 0.3MPa; flow regulating valve (D), upper computer (E), installed ProLinkII software; ambient temperature: 20°C±5°C.

[0039] 1. Valve opening and corresponding flow value coefficient setting

[0040] (1) if figure 2 As shown, use a conduit with a pressure resistance ≥ 0.4MPa to connect the gas source connector (10) of the digitally controlled oxygen inhaler (A) with the pressure stabilizing valve (B) and the oxygen gas source in sequence;

[0041] (2...

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Abstract

The invention relates to a flow control module capable of automatically correcting valve opening. The flow control module is mainly formed by a control unit (1), a DC (Direct Current) motor (2), a valve seat (3), valve core (4), a sealing ring (5), a transmission piece (6), a pressure sensor (7) and an oxygen passage (8). The flow control module disclosed by the invention has the advantages that output flow of oxygen is set, metered and controlled by adopting the valve opening, the manufacturing cost of a CNC (Computer Numerical Control) type oxygen inhalator is reduced, the valve opening is dynamically corrected and adjusted, oxygen output can be more accurate and more stable than the oxygen output of a traditional oxygen inhalator, and the flow control module can be widely used in all kinds of CNC type oxygen inhalator products.

Description

Technical field [0001] The invention relates to a flow control module capable of automatically correcting the opening of a valve, belonging to flow control components in oxygen inhalers used by medical institutions. Background technique [0002] Oxygen inhaler is an essential tool for adjusting and observing oxygen flow during oxygen therapy. Flow regulating valve and flow meter are the two core components of oxygen inhaler. Flow regulating valve is mainly used for opening / closing and flow adjustment of oxygen. The meter is used to observe the real-time flow value. At present, buoy-type oxygen inhalers (float flowmeters) are still commonly used in domestic hospitals. The advantages are simple structure, low cost and durability, but its disadvantages are also obvious. It is generally inconvenient to adjust the flow rate (manual adjustment knob, unstable buoy drift) , Large measurement error (caused by changes in air supply pressure), data cannot be stored and other shortcomi...

Claims

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Application Information

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IPC IPC(8): A61M16/20
Inventor 阮雪红陈旭良
Owner XIAN WINZISS MEDICAL GRP CO LTD
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