Pump and method for expansion elasticity of pump membrane

Abstract

A pump comprising a pump housing member (1) having a chamber (21) with inner walls and an open end having a first area (25), the pump housing member (1) comprises an enlarged surface surrounding the open end of the chamber (21). The pump further comprises a second pump housing member (5) and a membrane element (32) with a second area (27). The membrane element (32) has a first central section having a third area (28) with same size as the first area (25) of the open end of the chamber (21). The membrane element (32) is arranged on the pump housing element (1) with the first central section positioned over the open end, forming a sealed chamber. A portion of the membrane element (32) is slidably clamped between the enlarged surface and the second pump housing member (5).

Description

technical field [0001] The present invention relates generally to the field of diaphragm pumps. The invention particularly relates to a diaphragm pump used as a sampling pump in patient monitoring, respiratory monitoring, and anesthesia monitoring equipment, especially in medical ventilation monitoring and gas analyzers for monitoring patient respiratory gas components. Background technique [0002] The diaphragm pump has the advantages of simple structure, compactness and good sealing. Therefore, diaphragm pumps are widely used in medical equipment and biochemical analysis as sampling pumps for fluid analysis. In the field of medical ventilation monitoring, the gas measurement module analyzes the gas collected by the diaphragm pump from the patient's breathing circuit, and monitors the composition of the gas in the patient's breathing circuit in real time to obtain the patient's status. At present, gas measurement modules tend to be miniaturized and have better stability ...

AI Technical Summary

Problems solved by technology

(The outer edge of the film in this case is not fixed) This design limits the elastic deformation capacity of the film and also limits the stroke length of the film

The pump area limits the maximum pump pressure of the diaphragm pump (because the pump area and the pump force will jointly limit the maximum pump pressure) and fatigue life

Another problem is that when the flat membrane is matched to the concave or flat surface of the cavity, noise will be generated, at the same time, the stroke will stop immediately to generate mechanical vibration

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