Output concentration control device of anesthesia evaporator

Abstract

An output concentration control device of an anesthesia evaporator comprises an outer magnetic yoke, an inner magnetic yoke, a magnet, coils, a valve seat, guide columns, a pull rod, a reset spring and a valve element. The inner magnetic yoke is located in an inner cavity of the outer magnetic yoke. The magnet is arranged on the wall of the inner cavity of the outer magnetic yoke. The coil is located between the inner magnetic yoke and the magnet. A gas inlet is formed in one side of the valve seat. A gas outlet is formed in the other side, opposite to the gas inlet, of the valve seat. A gas loading inlet is formed in the bottom of the valve seat. The upper portion of the valve seat is connected with the bottom of the outer magnetic yoke. The pull rod, the reset spring and the valve element are located in the valve seat. Two guide holes communicated with the valve seat are formed in the bottom of the outer magnetic yoke. The guide columns are movably arranged in the guide holes. The upper ends of the guide columns are connected with the coil. The lower ends of the guide columns are connected with the pull rod. The pull rod is connected with the upper end of the valve element through the reset spring. The lower end of the valve element is located in a valve opening in the bottom of the valve seat.

Description

technical field [0001] The invention belongs to the technical field of anesthesia evaporator manufacturing in medical equipment, and in particular relates to a control device for outputting the concentration of anesthesia mixed gas from an anesthesia evaporator. Background technique [0002] The concentration output control of the anesthesia vaporizer is in a key position in the entire anesthesia vaporizer. The principle of the concentration output control device of the anesthesia vaporizer is as follows: figure 1 As shown, an air inlet 51, a carrier gas port 53, and a gas outlet 52 are usually provided, and the gas flow direction is as follows: figure 1 indicated by the arrow in the middle. After the input gas enters through the air inlet, a part of the gas is directly output from the gas outlet, and the other part of the gas enters the anesthetic volatilization chamber 54 through the carrier gas inlet 53, and the anesthetic gas is carried out through the carrier gas outl...

AI Technical Summary

Problems solved by technology

The concentration output control of the traditional anesthesia vaporizer, that is, the opening and closing of the carrier gas port adopts a mechanical structure, which belongs to the open-loop control technology. It cannot achieve dynamic compensation control for changes in flow, pressure and other factors, and the actual output accuracy and stability are not perfect.

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