Gas concentration regulating device

Abstract

The invention provides a gas concentration regulating device comprising a valve plug, a valve body and a valve cover, wherein the valve plug comprises a first section and a second section which are successively connected along the axial direction; the valve body is provided with a cavity body for containing the valve plug, wherein the cavity body comprises a first through hole and a second through hole which are successively communicated along the axial direction; the intersection of the first through hole and the second through hole forms a regulating port; the side wall of the valve body is provided with an A gas vent hole; the valve cover is sheathed in the second through hole; one end of the valve cover, which extends into the second through hole, is provided with a third through hole communicated with B gas; a gas mixing cavity is formed among the side wall of the second through hole, the second section and the valve cover; the side wall of the valve body is provided with the gas outlet hole of the gas mixing cavity; the second section can be arranged in the regulating port and the third through hole in an axially moving mode; the second section and the regulating port form a first ventilation cross section; the second section and the third through hole form a second ventilation cross section; the ventilation areas of the first ventilation cross section and the second ventilation cross section change along with different axial directions of the second section; and the minimum ventilation areas of the first ventilation cross section and the second ventilation cross section are zero.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a gas concentration adjusting device. Background technique [0002] Existing gas concentration regulating device at present, for example A gas is oxygen, B gas is air, and this gas concentration regulating device is an oxygen concentration regulating device, and this device cannot satisfy oxygen concentration from 21% (the oxygen concentration in air is 21%) to 100% sensitive and continuously adjustable requirements, users cannot achieve timely and accurate adjustments. [0003] The inventors have found at least the following problems in the prior art: the gas concentration adjustment device in the prior art cannot adjust the mixing degree of two different gases sensitively and continuously. Contents of the invention [0004] The purpose of the present invention is to provide a gas concentration adjustment device, which can solve the problem that the gas concentration adjustme...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a gas concentration adjustment device, which can solve the problem that the gas concentration adjustment device in the prior art cannot adjust the mixing degree of two different gases sensitively and continuously.

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