Gas circuit switching device of expectoration machine and expectoration system

Abstract

The invention provides an air path switching device of an expectoration machine and an expectoration system. The air path switching device of the expectoration machine comprises a shell and a valve element, a cavity is formed in the shell, and the valve element is movably arranged in the cavity and can be driven by external force to be switched among a first valve position, a second valve position and a third valve position. Wherein the shell is provided with an air inlet, an air outlet, a patient communication port and an external communication port; the valve element comprises a body, partition plates and an exhaust port communicating hole, wherein the partition plates and the exhaust port communicating hole are arranged on the body. The partition plates divide the cavity into a plurality of branch cavities. Under different valve positions, different communicating ports can be communicated through the exhaust port communicating hole or the branch cavity, so that the purpose of switching air paths of the expectoration machine under different modes is achieved. According to the gas path switching device of the expectoration machine, the branch cavities serve as communicating channels between the different communicating openings, the smoothness of gas flowing is guaranteed, and the gas buffering effect is achieved; the whole air path switching device is simple and efficient in structure, and the manufacturing cost of the expectoration machine can be reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an air circuit switching device for an expectoration machine. In addition, the present invention also relates to a expectoration system. Background technique [0002] Coughing is one of the important defense mechanisms of the human body. It prevents poisonous gas, bacteria and other harmful substances or various foreign substances from entering the airway; it keeps the airway unobstructed by discharging inhaled foreign substances or airway secretions out of the airway. [0003] For healthy people, breathing and coughing are the basic functions; for some critically ill patients, when their respiratory system is impaired, basic breathing functions and coughing are difficult to complete independently. For example, in patients with radiculopathy or restrictive lung disease with symptoms of respiratory muscle paralysis and low cough function, foreign substances may cause pneu...

AI Technical Summary

Problems solved by technology

In order to realize the switching of the internal gas circuit, most of the existing expectoration machines have designed a complex gas circuit switching structure and control system, resulting in high manufacturing costs and complicated manufacturing processes of the expectoration machine; and increased medical costs.

[0007] At the same time, due to the complex structure of the internal air circuit, the flow path of the air flow becomes longer, which is prone to the problem of large flow loss; in addition, in order to produce the high-frequency oscillation effect of the respiratory air flow, it is necessary to increase the air flow switching structure based on the existing complexity. High-frequency oscillation device, which further increases the design and manufacturing difficulty of the expectoration machine

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