WO2022052296A1 - 一种热式质量流量计探头 - Google Patents

一种热式质量流量计探头 Download PDF

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Publication number
WO2022052296A1
WO2022052296A1 PCT/CN2020/129048 CN2020129048W WO2022052296A1 WO 2022052296 A1 WO2022052296 A1 WO 2022052296A1 CN 2020129048 W CN2020129048 W CN 2020129048W WO 2022052296 A1 WO2022052296 A1 WO 2022052296A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating element
thermal mass
temperature detection
thermal
detection element
Prior art date
Application number
PCT/CN2020/129048
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
常琰境
彭雄飞
费舍尔 托马斯
Original Assignee
希尔思仪表（深圳）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 希尔思仪表（深圳）有限公司 filed Critical 希尔思仪表（深圳）有限公司
Priority to DE112020000062.1T priority Critical patent/DE112020000062T5/de
Publication of WO2022052296A1 publication Critical patent/WO2022052296A1/zh

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/14—Casings, e.g. of special material

Definitions

  • the second is a constant temperature differential thermal flowmeter. Its working principle is: the temperature detection element measures the temperature T1 of the fluid, and the heating element is automatically heated to the temperature T2. When a fluid flows through the temperature detection element and the heating element, a part of the heating element The heat will be taken away by the fluid, so that the temperature of the heating element will drop. By automatically adjusting the heating power of the heating element, the temperature difference between the temperature detection element and the heating element will remain unchanged. The faster the fluid flows, the more heat it takes away. The greater the heating power of the heating element, the greater the fluid mass flow rate can be measured as a function of the fluid flow rate and the power increase of the heating element.
  • the temperature detection element includes a second substrate and a temperature sensor attached to the back of the second substrate, and the front surface of the second substrate constitutes the lower end surface of the temperature detection element.
  • the connection between the thermal mass flowmeter probe 100 and the controller and the technical solution of how to realize flow detection belong to the prior art, and will not be repeated here.
  • the lower end surface of the heating element 10 and the lower end surface of the temperature detection element 20 are both perpendicular to the axial direction of the connecting shaft 200, which means that the lower end surface of the heating element 10 and the lower end surface of the temperature detection element 20 are both perpendicular to the axis of the connecting shaft 200.
  • the central axis 101 of the connecting shaft 200 is vertical.
  • the heating element 10 and the temperature detection element 20 of the thermal mass flowmeter probe in the present application are both disposed at the inner lower end of the housing 30 and the lower end face is perpendicular to the axial direction of the connecting shaft 200.
  • the thermal mass flowmeter probe is vertical
  • the lower end face of the heating element 10 is parallel to the flow direction of the measured medium, and the fluid can flow on the lower end faces of the heating element 10 and the temperature detection element 20. Therefore, the heating element 10 and the temperature detection element 20 are subjected to At the same time of good protection, it can also be in good thermal contact with the fluid, thereby improving the measurement accuracy of the thermal mass flowmeter probe 100 .
  • the heating element 10 is thermally isolated from the temperature detection element 20, which reduces the influence of the heating element 10 on the temperature detection element 20, so that the fluid temperature measurement is more accurate, and therefore the flow measurement is more accurate.
  • an adapter plate 40 is provided in the housing 30 , and a plurality of conductive pins 41 are inserted into the adapter plate 40 , and one end of the plurality of conductive pins 41 is connected to the The heater 12 or/and the temperature sensor 22 are connected, and the other end is connected to the controller through a lead wire. Understandably, when the heater 12 and the temperature sensor 22 are both resistance temperature sensors, the conductive pin 41 is connected to the heater 12 and the temperature sensor 22, and the conductive pin 41 is electrically connected to the controller through the lead wire; and When the temperature sensor 22 is a digital temperature sensor, the digital temperature sensor is directly electrically connected to the controller through lead wires.
  • the heater 12 and the temperature sensor 22 are fixed by welding through the adapter plate 40 , and the information detected by the heater 12 or the temperature sensor 22 is transmitted to the controller through the conductive pins 41 .
  • the adapter board 40 in this embodiment facilitates the circuit connection between the controller, the heater 12 and the temperature sensor 22 .
  • the connecting shaft 200 and the upper casing 31 are made of metal, the connecting shaft 200 and the upper casing 31 are integrally formed, and the upper casing 31 and the lower casing 32 are threadedly connected.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
PCT/CN2020/129048 2020-09-11 2020-11-16 一种热式质量流量计探头 WO2022052296A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112020000062.1T DE112020000062T5 (de) 2020-09-11 2020-11-16 Thermische Massendurchflussmessersonde

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010953184.9 2020-09-11
CN202010953184.9A CN111947727A (zh) 2020-09-11 2020-09-11 一种热式质量流量计探头

Publications (1)

Publication Number Publication Date
WO2022052296A1 true WO2022052296A1 (zh) 2022-03-17

Family

ID=73356316

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/129048 WO2022052296A1 (zh) 2020-09-11 2020-11-16 一种热式质量流量计探头

Country Status (3)

Country Link
CN (1) CN111947727A (de)
DE (1) DE112020000062T5 (de)
WO (1) WO2022052296A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113108856B (zh) * 2021-04-14 2022-05-27 合肥工业大学 一种纯硬件电路的恒功率型热式质量流量计及其标定方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885938A (en) * 1988-12-16 1989-12-12 Honeywell Inc. Flowmeter fluid composition correction
US5311447A (en) * 1991-10-23 1994-05-10 Ulrich Bonne On-line combustionless measurement of gaseous fuels fed to gas consumption devices
US5780737A (en) * 1997-02-11 1998-07-14 Fluid Components Intl Thermal fluid flow sensor
US5913250A (en) * 1997-10-29 1999-06-15 Fluid Components Intl Pressure compensated thermal flow meter
CN1260039A (zh) * 1997-07-29 2000-07-12 气体控制有限公司 气量计
US20010032503A1 (en) * 1999-03-18 2001-10-25 Wolfgang Schrittenlacher Thermal flow-rate sensor and method for determining the flow rate of a fluid
CN1405535A (zh) * 2002-11-06 2003-03-26 徐长祥 线上流量计的再校验方法
CN101165462A (zh) * 2006-10-18 2008-04-23 株式会社岛津制作所 热式质量流量计
CN101421592A (zh) * 2003-08-14 2009-04-29 流体元件国际公司 动态混合气体流量计
CN201514246U (zh) * 2009-09-23 2010-06-23 伊玛精密电子（苏州）有限公司 插入式热式液体质量流量计
CN102519527A (zh) * 2011-12-16 2012-06-27 哈尔滨四远测控技术有限责任公司 热式恒功率气体流量计

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885938A (en) * 1988-12-16 1989-12-12 Honeywell Inc. Flowmeter fluid composition correction
US5311447A (en) * 1991-10-23 1994-05-10 Ulrich Bonne On-line combustionless measurement of gaseous fuels fed to gas consumption devices
US5780737A (en) * 1997-02-11 1998-07-14 Fluid Components Intl Thermal fluid flow sensor
CN1260039A (zh) * 1997-07-29 2000-07-12 气体控制有限公司 气量计
US5913250A (en) * 1997-10-29 1999-06-15 Fluid Components Intl Pressure compensated thermal flow meter
US20010032503A1 (en) * 1999-03-18 2001-10-25 Wolfgang Schrittenlacher Thermal flow-rate sensor and method for determining the flow rate of a fluid
CN1405535A (zh) * 2002-11-06 2003-03-26 徐长祥 线上流量计的再校验方法
CN101421592A (zh) * 2003-08-14 2009-04-29 流体元件国际公司 动态混合气体流量计
CN101165462A (zh) * 2006-10-18 2008-04-23 株式会社岛津制作所 热式质量流量计
CN201514246U (zh) * 2009-09-23 2010-06-23 伊玛精密电子（苏州）有限公司 插入式热式液体质量流量计
CN102519527A (zh) * 2011-12-16 2012-06-27 哈尔滨四远测控技术有限责任公司 热式恒功率气体流量计

Also Published As

Publication number Publication date
DE112020000062T5 (de) 2022-08-18
CN111947727A (zh) 2020-11-17

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