Constant low-pressure air source adjustment device

Abstract

The invention discloses a constant low-pressure air source adjustment device which comprises an MCU (micro control unit), a motion device, a closed box, an air source distribution device, a valve device and an air source output port, wherein a position sensor unit is used for controlling the motion device to move; the motion device is controlled to cooperate with the closed box to change the volume of fixed air under closed standard atmospheric pressure so as to obtain an expected constant pressure air source; the valve device is used for controlling the closed box to be connected with or separated from the standard atmospheric pressure; the air source distribution unit is used for dividing the air source into three paths of air with the same pressure and supplying the air to an adjustment feedback device, the air source output port and the input and output ports of the closed box; the air source output port has the same air source pressure as the closed box; the air in the air source output port is output when the air source output port is connected with an external sensor; and the outside air is input when the air source output port is communicated with the outside. The constant low-pressure air source adjustment device is applied to an environment in which the constant low-pressure air source needs to be used and the whole air channel is closed, equipment does not need to independently provide the air source, simple and repeated debugging operations of production staffs are reduced, and the constant low-pressure air source adjustment device can be used in limited working environments.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a constant low-pressure gas source regulating device. Background technique [0002] In the production and debugging process of medical equipment such as ventilators and anesthesia machines, it is often necessary to debug pressure sensors, such as pressure calibration, verifying the quality of pressure sensors, etc., due to manual participation and repeated simple debugging work, and human uncertainties, etc. , It is easy to have problems such as low production efficiency and high labor costs in the production process, and unstable product quality. The constant pressure air source adjustment device appears to meet this demand. [0003] The power device in the prior art uses a single high-pressure air source, such as a high-pressure air source device, an air compressor, etc., and forms a closed-loop control system through a pressure sensor and a solenoid valve to achieve a c...

AI Technical Summary

Problems solved by technology

However, this prior art has the following defects: first, due to the characteristics of the solenoid valve itself, the shut-off response time, the system acquisition feedback signal is slow, and the low-pressure air source pressure is unstable when the solenoid valve is turned off; secondly, due to its power unit Using a single high-pressure air source (high-pressure air source device, air compressor, etc.), its consumption cost is relatively expensive; third, the volume of its power unit is relatively large, and it is troublesome to use, and it may also need to provide a separate air source. subject to other conditions

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