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Gas flowmeter

A technology of gas flowmeter and airway, which is applied in the direction of volume/mass flow generated by mechanical effects, fluid flow detection by measuring pressure difference, etc., which can solve the problems of long straight pipe section and large volume, and achieve a large range ratio Effect

Pending Publication Date: 2018-03-13
矽翔微机电系统(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a gas flow meter to solve the problems in the prior art that only low flow velocity and small flow can be measured, and the front straight pipe section requires a long length and a large volume

Method used

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Embodiment Construction

[0020] Please refer to figure 1 with figure 2 , the present invention provides a gas flowmeter, comprising: an outer shell 1, an air inlet pipe 2, a rectifier 3, a top cover 4 and a connector 5, the air inlet pipe 2 is arranged inside the outer shell 1, The annular portion between the outer shell 1 and the air intake duct 2 is formed with a plurality of return air passages 6 extending axially along the air intake duct 2 , the top cover 4 and the outer shell 1 The upper end of the upper end is connected, and the installation space is formed between the top cover 4 and the end of the outer casing 1 and the air intake pipe 2, and the fairing 3 is arranged in the installation space; the connector 5 Connected to the lower end of the outer shell 1; the fairing 3 includes a main channel 7 and a plurality of sub-flow channels 8 communicated with the main channel 7, and the plurality of sub-flow channels 8 are connected to the plurality of return air channels 6 are arranged and comm...

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Abstract

The invention discloses a gas flowmeter. The gas flowmeter includes a shell body, a gas inlet pipeline, a rectification sleeve, a top lid and a connector. The gas inlet pipeline is arranged in the shell body, an annular part between the shell body and the gas inlet pipeline is provided with multiple backflow gas passages axially extending along the gas inlet pipeline, the top lid is connected to the upper end of the shell body, the top lid and the end portions of the shell body and the gas inlet pipeline form an installation space, and the rectification sleeve is arranged in the installation space; the connector is connected to the lower end of the shell body; the rectification sleeve comprises a main flow channel and multiple sub flow channels communicated with the main flow channel, thesub flow channels are arranged and communicated with the backflow gas passages in a one-to-one corresponding mode, and the main flow channel is communicated with the outlet end of the gas inlet pipeline; one of the backflow gas passages is internally provided with a flow sensor. By adopting the gas flowmeter, a wide flow measurement range can be achieved with small-sized space, and the gas flowmeter has a high measurement range ratio.

Description

technical field [0001] The invention relates to the field of flow measurement, in particular to a gas flow meter. Background technique [0002] In the field of gas flow detection, there are two types of detection principles: volume flow and mass flow. In the field of mass flow detection, there are two types of detection principles: Coriolis measurement principle and calorimetric mass flow measurement principle. The physical principle of calorimetric mass flow measurement has heat conduction. Distributed measurement principle and golden law measurement principle of heat dissipation effect, thermal mass flow measurement has capillary type, armored type, micro-electromechanical system type and other principles in structural principles. [0003] The capillary thermal mass flowmeter adopts the principle of thermal distributed mass measurement, and two or three sets of thin thermal resistance wires are wound outside the thin-walled measuring tube to form heating and detection elem...

Claims

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Application Information

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IPC IPC(8): G01F1/44
CPCG01F1/44
Inventor 黄立基周昌全代梦颖宿聪邓文红
Owner 矽翔微机电系统(上海)有限公司
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