Expiratory flow detector
A flow detector and flow sensor technology, applied in the field of medical equipment, can solve problems such as poor practicability, sensor failure, and influence on the accuracy of flow detection, and achieve the effects of good practicability, improved accuracy, and elimination of gas eddy currents
Active Publication Date: 2019-03-05
BEIJING AEONMED
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Problems solved by technology
However, in the actual use process, the exhalation state of each patient is very different, and factors such as eddy currents often appear in the exhalation that affect the flow detection, which greatly affects the accuracy of the flow detection.
Moreover, there is a certain degree of humidity in the patient's breath, and the water vapor will condense into water after the temperature drops. If water enters the flow sensor, it will cause inaccurate measurement of the sensor or even sensor failure, which is poor in practicability
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[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0029] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...
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The invention discloses an expiration flow detector. The expiration flow detector comprises an expiration valve element internally provided with a valve cavity, a laminar flow device and a flow sensor. The valve cavity is internally provided with an air resistance part for dividing the valve cavity into a first sub-valve cavity and a second sub-valve cavity, a first channel and a second channel are formed in the expiration valve element, one end of the first channel is communicated with the first sub-valve cavity, and one end of the second channel is communicated with the second sub-valve cavity. The laminar flow device is arranged in the first channel and / or the second channel. The flow sensor is arranged outside the expiration valve element, and the flow sensor is connected with the other end of the first channel and the other end of the second channel. According to the expiration flow detector, the gas eddy phenomenon in the corresponding gas channels is reduced even eliminated through the laminar flow device, the flow detecting accuracy is improved, and practicability is high.
Description
technical field [0001] The invention relates to the field of medical equipment, in particular to an expiratory flow detector. Background technique [0002] At present, the expiratory flow detection method of bypass sampling is widely used. However, in the actual use process, the exhalation state of each patient varies greatly, and factors such as eddy currents often appear in the exhalation that affect the flow detection, which greatly affects the accuracy of the flow detection. Moreover, there is a certain humidity in the patient's breath, and the water vapor will condense into water after the temperature drops. If water enters the flow sensor, it will cause inaccurate measurement of the sensor or even sensor failure, which is poor in practicability. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide an expiratory flow detecto...
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IPC IPC(8): A61B5/087
Inventor 冯丙华王军
Owner BEIJING AEONMED