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Calibration method and system for Venturi device

A calibration method, Venturi technique, applied in respirator etc.

Active Publication Date: 2015-09-30
深圳市普博医疗科技股份有限公司
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a calibration method and system for a venturi device, aiming at the problem that there is currently no effective method to enable the ventilator to quickly reach the pressure or flow rate of the preset parameters

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  • Calibration method and system for Venturi device
  • Calibration method and system for Venturi device
  • Calibration method and system for Venturi device

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] Venturi effect: This effect is manifested in the phenomenon that the fluid velocity or flow increases when the restricted flow passes through the reduced flow section, and the flow rate is inversely proportional to the flow section. According to Bernoulli's law, the increase of flow rate is accompanied by the decrease of fluid pressure, which is the common Venturi phenomenon.

[0025] When gas or liquid flows in the Venturi tube, at the narrowest point of the tube, the dynamic pressure (velocity head) reaches the maximum value, and the static pressure (rest pressure) reaches the minimum valu...

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Abstract

The invention is applicable to the field of Venturi devices, and provides a calibration method for a Venturi device. The method comprises steps as follows: A, voltage output quantities are evenly and equally divided into multiple groups of voltage control quantities, and a corresponding air output quantity is controlled by each group of voltage control quantities to flow into a Venturi system module; B, pressure values, air flow values and oxygen concentration values of each air output quantity passing through the Venturi system module under conditions of different resistance values are acquired; C, a four-dimensional correlation chart is formed according to the values; D, according to the four-dimensional correlation chart, rest parameters are acquired through partial parameters of the voltage control quantities, the pressure values, the air flow values and the oxygen concentration values. According to the four-dimensional correlation chart acquired with the method, with the adoption of an equal ratio calculation method, back calculation of the required voltage control quantities is realized according to required pressure and flow, or oxygen concentration is calculated according to the current voltage control quantity, pressure and flow, and the pressure or the flow velocity of set parameters can be realized quickly with the method.

Description

technical field [0001] The invention belongs to the field of Venturi devices, in particular to a calibration method and system for a Venturi device. Background technique [0002] The function of the ventilator is to supply air to the patient according to the parameters set by the doctor, because when the flow rate passes through the Venturi device, it will produce a Venturi effect. It is the use of the generated suction to control the output gas and oxygen concentration, which brings benefits. At the same time, it also changes the relationship between the voltage control amount, flow rate and pressure of the Venturi device. In order for the ventilator to accurately and quickly reach the set Therefore, it is necessary to correct the Venturi device with changed characteristics, but there is currently no effective method to enable the ventilator to quickly reach the pressure or flow rate of the preset parameters. Contents of the invention [0003] The technical problem to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/00
Inventor 邹庭赖春红
Owner 深圳市普博医疗科技股份有限公司
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