Gas circuit switching device of expectoration machine and expectoration system

• Main Authors: XU LIXIAO, CAO XUEYAN, LIU KANGKANG, LI LUOCHEN, YIN TENGCHAO
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2023
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

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 exp