Breathing device capable of detecting air-flow differential

Abstract

The invention discloses a breathing device capable of detecting an air-flow differential. The breathing device is connected with a breathing tube and comprises a main machine, a pressure sensor and a connecting device; the main machine comprises a first shell with a communicating part and a first air-flow channel penetrating through the first shell; the pressure sensor is arranged in the main machine and connected with the communicating part; the connecting device is detachably connected between the main machine and the breathing tube and comprises a second air-flow channel, a filter device and an air-flow guiding part, wherein the second air-flow channel is communicated with the first air-flow channel, the filter device is arranged in the second air-flow channel and used for filtering airflow conveyed through the breathing tube, the end of the air-flow guiding part is communicated with the communicating part, and the other end of the air-flow guiding part receives unfiltered airflow; the pressure sensor detects pressure of the unfiltered airflow through the communicating part and the air-flow guiding part. By means of the breathing device, corresponding operation is conducted more accurately according to the airflow produced when a user breathes.

Description

technical field [0001] The present invention relates to a breathing device, especially a breathing device that can directly detect the pressure of the airflow that has not been filtered by the filtering device. Background technique [0002] Continuous positive airway pressure therapy (Continuous Positive Airway Pressure, hereinafter referred to as CPAP) breathing device has been widely used in medical equipment. Breathe easily without obstruction. [0003] The CPAP breathing device is assembled with the user's mask through the breathing tube, and a pressure sensor is installed in the CPAP breathing device. The pressure sensor is used to detect the breathing state of the user, that is, to detect the user's breathing into the CPAP breathing device through the breathing tube. The pressure of the airflow generated during breathing, and the CPAP breathing device provides the correct and continuous pressure for the user to breathe according to the detection results of the pressur...

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Problems solved by technology

[0004] However, since the filter device is arranged in the airflow transmission channel between the CPAP breathing device and the breathing tube, the pressure of the airflow detected by the pressure sensor in the CPAP breathing device is actually the airflow generated by the user breathing through the filter device The pressure after filtration, however, the pressure when the airflow does not pass through the filter device side is actually different from the pressure when the airflow passes through the filter device due to the barrier of the filter device, so the detection result of the pressure sensor is actually affected by the filtration of the filter device. It cannot directly and accurately reflect the pressure of the airflow generated when the user breathes, so the CPAP device will not be able to accurately control the pressure supplied to the user

[0005] In addition, in addition to the pressure detector, some CPAP devices also have a flow resistor and a flow detector. The flow resistor is used to let the airflow flow through, so that the airflow generates a pressure difference between the inlet and outlet of the flow resistor, and the flow rate is detected. The device is used to detect the pressure when the airflow does not pass through the air inlet of the flow resistor and the pressure of the airflow after passing through the air outlet of the flow resistor to calculate the difference between the two pressures, and then calculate the flow rate of the airflow. However, setting the flow resistor will Additional increase in production costs for CPAP devices

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