Breathing machine and proportional valve

Abstract

The invention provides a breathing machine and a proportional valve. The proportional valve comprises a shell body and a valve seat. The shell body comprises a cavity body, an inlet, an outlet and a valve port are formed in the valve seat, the shell body is connected with the valve seat in a sealing mode, and the inlet is communicated with the valve port. A coil, a first soft magnet, an armature, a first elastic element and a seal cover plate are arranged inside the shell body. The coil is wound on the outer periphery of the first soft magnet, the first magnet is arranged on an axial first side of the armature, the seal cover plate is connected with an axial second side of the armature, the first elastic element is arranged on the second side of the armature, and the first soft magnet drives the armature to enable the surface of the seal cover plate to contact with or separate from the end face of the valve port. Flow control of the proportional valve is realized through the opening and the closing between the seal cover plate and the end face of the valve port, wherein the opening and the closing are controlled in an electromagnetic mode. Therefore, the aging problem of a seal ring when the seal ring is used for sealing does not exist, and the proportional valve has the advantages of being good in sealing effect, high in response speed, low in cost, convenient to repair, and capable of reducing hysteresis phenomenon.

Description

technical field [0001] The invention relates to the field of valves, more specifically, to a ventilator and a proportional valve. Background technique [0002] The ventilator is an auxiliary ventilation device. It connects the inhalation tube and the exhalation tube to the patient at the same time. The patient inhales gas from the inspiratory tube of the ventilator, and then discharges the gas through the exhalation tube. During the use of the ventilator, the patient must be mechanically ventilated. The ventilator can have its own compressor or require an air source with a pressure of not less than 4bar, that is, a valve capable of high-pressure and large-flow proportional control is required to control the ventilation volume. control. For patients who are being treated, the control of ventilation volume is very important (especially infants and critically ill patients). Therefore, it is necessary to accurately control the flow rate of the ventilator and require a fast and ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a ventilator and a proportional valve to solve the problems of poor sealing effect, serious hysteresis, low response speed, high cost, inconvenient maintenance and poor versatility of the proportional valve in the prior art

Images