Float flowmeter

Abstract

A float flowmeter is characterized in that the float flowmeter comprises a flowmeter body, the flowmeter body being provided with an inner shell, an outer shell, a gas inlet and a gas outlet, the outer shell surrounding the inner shell, and gas sequentially passing through the gas inlet, the inner shell, the outer shell and the gas outlet and flowing through the flowmeter body; a floater, locatedin the containing space in the inner shell and can move in the flow meter body under the action of gas passing through the flow meter body, and the floater being provided with a magnetic part; and a Hall element, located on the side wall of the inner shell of the flow meter body and used for detecting the position of the magnetic part of the floater.

Description

technical field [0001] The present application relates to a gas flow measuring device, in particular to a device for digitally collecting oxygen flow at the bedside of a hospital. Background technique [0002] At present, there are two main types of devices on the market for measuring oxygen flow at the patient's bedside, one is a mechanical float flowmeter, and the other is an electronic oxygen flowmeter: [0003] The first type is the mechanical oxygen flowmeter, which uses a mechanical device to estimate the instantaneous gas flow rate by a simple scale scale, which cannot achieve accurate measurement results, especially for small flow gas. Even more, it cannot realize the purpose of digital measurement and digital management, and cannot meet the requirements of the era of digital hospitals. [0004] The second type is the heating type thermistor bridge flow sensor, which adopts a heating wire in the gas circuit and installs thermistors on both sides. When the air flow p...

AI Technical Summary

Problems solved by technology

[0003] The first type is the mechanical oxygen flowmeter, which uses a mechanical device to estimate the instantaneous gas flow rate by a simple scale scale, which cannot achieve accurate measurement results, especially for small flow gas.

It can't even realize the purpose of digital measurement and digital management, and can't meet the requirements of the era of digital hospitals

[0004] The second type is the heating type thermistor bridge flow sensor, which adopts a heating wire in the gas circuit and installs thermistors on both sides. When the air flow passes through, the resistance of the thermistor in the bridge changes, resulting The bridge is unbalanced, the output sampling voltage is obtained, and the oxygen flow rate at the reaction site changes. This device consumes a lot of power and has high manufacturing costs, so it is not suitable for general promotion.

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