Air channel system of pilot type control belt intelligent PEEP (positive end expiratory pressure) breathing machine

Abstract

The invention relates to an air channel system of a pilot type control belt intelligent PEEP (positive end expiratory pressure) breathing machine. The air channel system is communicated with a user through an external interface, a communication pipeline and a Peep value (PEEP) and comprises an oxygen communication pipeline, a reduced pressure pump (REG1), an oxygen flow regulation valve (NV1), an air communication pipeline, an air inlet single-way valve (DV1), an air flow regulating valve (NV2) and a Venturi device (WENTURI), wherein the reduced pressure pump (REG1) and the oxygen flow regulation valve (NV1) are arranged on the oxygen communication pipeline; the air inlet single-way valve (DV1) and the air flow regulating valve (NV2) are arranged on the air communication pipeline; the output end of the Venturi device (WENTURI) is communicated with the external interface through a main pipeline, the input end of the Venturi device (WENTURI) is communicated with the oxygen communication pipeline, the bypass of the Venturi device (WENTURI) is communicated with the air communication pipeline; Peep valve controls a branch air channel as well as a proportion solenoid valve (PSOL1) and a safety solenoid valve (SOV1) which are arranged on the branch air channel; and the outlet end of the proportion solenoid valve (PSOL1) is communicated with the pneumatic control end of the Peep valve, the inlet end of the safety solenoid valve (SOV1) is communicated with the oxygen communication pipeline, and the air discharge end of the safety solenoid valve (SOV1) is communicated with the Venturi device (WENTURI). The air channel system is high in work stability, long in working life, continuous and adjustable in PEEP, high in safety coefficient and low in air consumption.

Description

technical field [0001] The invention relates to medical electronics, in particular to a pilot-operated intelligent ventilator gas circuit system capable of accurate control, higher safety factor and low gas consumption. Background technique [0002] A ventilator is a device that can replace, control or change a person's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce breathing work consumption, and save heart reserve capacity. It must have the following four basic functions: inflate the lungs, convert inhalation to exhalation, expel alveolar gas, and convert exhalation to inhalation, and repeat in turn. Therefore, the corresponding must have: ⑴ can provide the power to transport gas, instead of the work of human respiratory muscles; ⑵ can produce a certain breathing rhythm, including breathing frequency and breath-inhalation ratio, to replace the function of the human respiratory central nervous system to control the breathing ...

AI Technical Summary

Problems solved by technology

When the Peep increases abnormally, the work required for exhalation increases, causing difficulty in exhaling, which may lead to the risk of suffocation and increase the work of breathing

[0004] At present, the ventilator adopts the control method in which the air supply control solenoid valve is connected in series in front of the intake flow regulating valve. Therefore, the ventilation diameter of the air supply control solenoid valve needs to be large enough to be used in a high-pressure environment, and it needs to be opened and closed repeatedly. Air supply control solenoid valve has high requirements and short service life

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