Intelligent fresh gas flow and oxygen concentration control device for anesthesia machine

A technology of fresh gas and oxygen concentration, applied in respirator and other directions, can solve the problems of unstable gas supply, inability to precisely control the flow of fresh gas and oxygen concentration, low safety, etc., to achieve stable supply, safe and reliable use, and gas flow. Accurate effect of value and oxygen concentration

CN101829386AInactive Publication Date: 2010-09-15张培林
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an intelligent fresh gas flow and oxygen concentration control device for an anesthesia machine, which comprises a gas mixing cavity, an oxygen input channel, a laughing gas input channel, an air input channel and a PLC control system, the oxygen input channel, the laughing gas input channel and the air input channel are respectively communicated with the gas mixing cavity to output fresh gas, the oxygen input channel, the laughing gas input channel and the air input channel are respectively provided with regulating valves controlled by stepping motors, the stepping motors on the three gas input channels are respectively connected with the PLC control system, and the PLC control system controls the stepping motors on the three gas input channels respectively after calculating according to set fresh gas flow and set oxygen concentration, thus regulating the corresponding regulating valves to realize the flow regulation of the three gas input channels. The device has simple structure, steady gas supply and safe and reliable use and can control the fresh gas flow and the oxygen concentration accurately.
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Description

technical field

[0001] The invention relates to a device for controlling fresh gas flow and oxygen concentration of an anesthesia machine, in particular to an intelligent control device for fresh gas flow and oxygen concentration. Background technique

[0002] The anesthetic gas is mixed with oxygen flow, nitrous oxide or air flow through the evaporator to carry the anesthetic agent. The amount of anesthesia is directly proportional to the concentration setting value of the evaporator and the flow rate of fresh gas. The fresh gas flow and oxygen concentration supplied by the traditional anesthesia machine are adjusted by a set of oxygen flowmeters, nitrous oxide or air flowmeters according to a certain flow ratio. The anesthesiologist manually adjusts the flowmeters according to needs. And the defects of inaccurate and unstable oxygen concentration lead to the inaccurate control of the anesthetic gas carried by the fresh gas. The accuracy of the flowmeter in this device is...

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] figure 1 As shown, the fresh gas flow rate and oxygen concentration intelligent control device mainly includes a gas mixing chamber 19 , an oxygen input channel 1 , a laughing gas input channel 2 , an air input channel 3 and a PLC control system 20 . Oxygen input channel 1 is provided with check valve 4, regulating valve 10, filter 13 and flow sensor 16 successively from the intake end, and stepper motor 7 is connected on the regulating valve 10, and the intake end of oxygen input channel 1 is also provided with There is an alarm valve 21, the stepper motor 7 and the flow sensor 16 are all connected to the PLC control system 20; the nitrous oxide input channel 2 is sequentially provided with a check valve 5, a regulating valve 11, a filter 14 and a flow sensor 17 from the intake end, The stepping motor 8 is connected to the regulating valve 11, ...