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
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[0020] 1. Example 1: An example of a numerically 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 simply and intuitively, 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 change caused by the unit opening change. 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] The valve opening and flow rate magnification M are shown in Table 1:
[0023] Table 1 Magnification M
[0024] Opening
[0025] 2. Micro DC motor (2), approved power 0.3W, = voltage 6.0V, speed 3rpm~76rpm, torque 0.9NM;
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Example Embodiment
[0037] Example 2: Setting of main technical parameters in the control unit (1) of the numerically controlled oxygen inhaler prepared by the present invention
[0038] The technical parameters are set in the control unit (1) of the numerical control oxygen inhaler (A) prepared in Example 1. The setting equipment includes: 0MPa~0.6MPa adjustable pressure gauge (B), accuracy 2.5; standard Flow meter (C), accuracy level 1; oxygen source, terminal air supply pressure not less than 0.3MPa; flow regulating valve (D), upper computer (E), install ProLinkII software; ambient temperature: 20℃±5℃.
[0039] 1. Valve opening and corresponding flow value coefficient setting
[0040] (1) such as figure 2 As shown, a pressure-resistant catheter ≥ 0.4 MPa is used to connect the air source connector (10) of the digitally controlled oxygen inhaler (A) with the pressure regulator valve (B) and the oxygen source in sequence;
[0041] (2) The oxygen output port (9) of the digitally controlled oxygen inhal...
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