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

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Problems solved by technology

[0005] The invention provides a gas flow meter to solve the problems in the prior art that only low flow veloci

Method used

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Example Embodiment

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

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Abstract

A gas flowmeter, comprising: an outer shell, an air inlet pipe, a rectifying sleeve, a top cover and a connector, the air inlet pipe is arranged inside the outer shell, and an annular portion between the outer shell and the air inlet pipe is formed with a A plurality of return air passages extending in the axial direction of the air pipeline, the top cover is connected to the upper end of the outer shell, and an installation space is formed between the top cover, the outer shell and the end of the air intake pipe, and the rectifier is arranged in the installation space; the connection The device is connected to the lower end of the outer casing; the fairing sleeve includes a main channel and a plurality of sub-flow channels connected with the main channel, and the plurality of sub-flow channels are set and communicated with a plurality of return air channels one by one. The outlet end is connected; a flow sensor is arranged in one of the multiple return air passages. The invention can use a smaller size space to obtain a larger flow measurement range and has a larger turndown 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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