WO2016140019A1 - 熱式流量センサ - Google Patents
熱式流量センサ Download PDFInfo
- Publication number
- WO2016140019A1 WO2016140019A1 PCT/JP2016/053667 JP2016053667W WO2016140019A1 WO 2016140019 A1 WO2016140019 A1 WO 2016140019A1 JP 2016053667 W JP2016053667 W JP 2016053667W WO 2016140019 A1 WO2016140019 A1 WO 2016140019A1
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- WIPO (PCT)
- Prior art keywords
- sensor
- heat flux
- transfer element
- pipe
- heat transfer
- Prior art date
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Classifications
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- 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
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- 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
- G01F1/6847—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow where sensing or heating elements are not disturbing the fluid flow, e.g. elements mounted outside the flow duct
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/01—Manufacture or treatment
Definitions
- the present invention relates to a thermal flow sensor that detects the flow rate of a measurement medium flowing in a pipe.
- this thermal flow sensor includes a first temperature sensor, a heat transfer element, and a second temperature sensor.
- the first temperature sensor detects the temperature of the measurement medium flowing in the pipe by detecting the temperature of the pipe.
- the heat transfer element is disposed downstream of the first temperature sensor in the flow direction of the measurement medium, and exchanges heat with the measurement medium (pipe).
- the second temperature sensor detects the temperature of the outside air. Note that the first temperature sensor is disposed sufficiently away from the heat transfer element so as not to be affected by the temperature of the heat transfer element in the pipe that exchanges heat.
- the temperature of the outside air is detected by the second temperature sensor, and the heat flux between the heat transfer element and the pipe is calculated based on the temperature of the outside air. Then, the flow rate of the measurement medium is calculated using the heat flux and the temperature of the measurement medium detected by the first temperature sensor.
- the thermal flow sensor disclosed in Patent Document 1 detects the temperature of the outside air and calculates (ie, estimates) the heat flux between the heat transfer element and the pipe based on the temperature of the outside air. There is a problem that it is easy to decrease.
- an object of the present invention is to provide a thermal flow sensor that can suppress a decrease in detection accuracy.
- One aspect of the thermal flow sensor includes a first temperature sensor that detects a temperature of a measurement medium flowing through a passage in a pipe by detecting a temperature at a predetermined portion of an outer wall surface of the pipe, and a first temperature sensor. It is arranged on the outer wall surface of the pipe in a state of being separated from the temperature sensor, and by heating or cooling the outer wall surface of the pipe, a heat transfer element that exchanges heat with the measurement medium and a heat transfer element on the outer wall surface of the pipe.
- a second temperature sensor that detects the temperature of the heated or cooled portion and a control unit that performs predetermined processing are provided.
- a heat flux sensor for detecting a heat flux between the heat transfer element and the pipe is disposed between the heat transfer element and the outer wall surface of the pipe, and the control unit is detected by the first temperature sensor.
- the flow rate of the measurement medium is detected based on the detected temperature, the temperature detected by the second temperature sensor, and the heat flux detected by the heat flux sensor.
- the heat flux sensor is arranged between the heat transfer element and the outer wall surface of the pipe, and the heat flux between the heat transfer element and the pipe is directly detected by the heat flux sensor. For this reason, it can suppress that the detection accuracy of a heat flux falls, and can suppress that the detection accuracy of the flow volume of a measurement medium falls.
- FIG. 4 is a cross-sectional view taken along line IV-IV in FIGS. 2 and 3.
- FIG. 5 is a cross-sectional view taken along line VV in FIGS. 2 and 3.
- FIG. 6 is a schematic diagram which shows the arrangement structure of the thermal type flow sensor in 2nd Embodiment of this invention. It is the top view which looked at the heat flux sensor shown in FIG. 6 from the back surface protection member side.
- FIG. 9 is a cross-sectional view taken along line IX-IX in FIGS. 7 and 8. It is the top view which looked at the heat flux sensor in 3rd Embodiment of this invention from the back surface protection member side. It is the top view which looked at the heat flux sensor shown in FIG. 10 from the surface protection member side.
- FIG. 12 is a cross-sectional view taken along line XII-XII in FIGS. 10 and 11. It is sectional drawing of the heat-transfer element and heat flux sensor in 4th Embodiment of this invention. It is a schematic diagram which shows the arrangement structure of the thermal type flow sensor in 5th Embodiment of this invention.
- the thermal flow sensor of the present embodiment detects the flow rate of the measurement medium flowing in the pipe 10, and as shown in FIG. 1, the first temperature sensor 20 and the second temperature sensor 30 that detect the temperature, A heat flux sensor 40 that detects the heat flux, a heat transfer element 50 that heats the pipe 10, and a control unit 60 are provided.
- the pipe 10 is made of a metal member such as SUS, and has a passage 11 through which a measurement medium flows.
- the flow direction of the measurement medium flowing in the pipe 10 will be described from the left side to the right side.
- the first temperature sensor 20 and the second temperature sensor 30 are composed of a thermistor or the like, and are arranged on the outer wall surface of the pipe 10 in a state of being separated from each other.
- the first temperature sensor 20 is disposed upstream of the second temperature sensor 30 in the flow direction of the measurement medium (left side in FIG. 1).
- the first temperature sensor 20 and the second temperature sensor 30 are connected to the control unit 60, and output a detection signal corresponding to the temperature on the outer wall surface of the pipe 10 in the arranged portion to the control unit 60.
- the first temperature sensor 20 detects the temperature of the portion of the outer wall surface of the pipe 10 that is not heated by the heat transfer element 50, and the second temperature sensor 30 transmits the temperature of the outer wall surface of the pipe 10.
- the temperature of the part heated by the thermal element 50 is detected. That is, the first temperature sensor 20 is disposed upstream of the second temperature sensor 30 in the flow direction of the measurement medium and is sufficiently separated from the second temperature sensor 30 (heat transfer element 50).
- the heat flux sensor 40 is disposed on the second temperature sensor 30 and connected to the control unit 60. Although specifically described later, a heat transfer element 50 is disposed on the heat flux sensor 40, and a detection signal corresponding to the heat flux between the heat transfer element 50 and the pipe 10 is sent to the control unit 60. Output.
- the configuration of the heat flux sensor 40 of the present embodiment will be specifically described.
- the heat flux sensor 40 is formed by integrating the insulating base material 100, the back surface protection member 110, and the surface protection member 120.
- the first and second interlayer connection members 130 and 140 are alternately connected in series.
- the rear surface protection member 110 is omitted for easy understanding.
- the insulating base material 100 is composed of a planar rectangular thermoplastic resin film represented by polyetheretherketone (PEEK), polyetherimide (PEI), and liquid crystal polymer (LCP).
- PEEK polyetheretherketone
- PEI polyetherimide
- LCP liquid crystal polymer
- the first and second via holes 101 and 102 of the present embodiment are formed in a cylindrical shape having a constant diameter from the front surface 100a to the back surface 100b of the insulating base material 100 (FIGS. 4 and 5). Reference), and may be formed in a tapered shape whose diameter decreases from the front surface 100a toward the back surface 100b. Further, the first and second via holes 101 and 102 may be formed in a tapered shape whose diameter decreases from the back surface 100b toward the front surface 100a, or may be formed in a rectangular tube shape.
- a first interlayer connection member 130 is disposed in the first via hole 101, and a second interlayer connection member 140 is disposed in the second via hole 102.
- the first and second interlayer connection members 130 and 140 are alternately arranged on the insulating base material 100.
- the first and second interlayer connection members 130 and 140 are made of different metals so as to exhibit the Seebeck effect.
- the first interlayer connecting member 130 includes a metal compound (solid-sintered) in which a powder of a Bi—Sb—Te alloy constituting P-type maintains a crystal structure of a plurality of metal atoms before sintering. Sintered alloy).
- the second interlayer connecting member 140 is a metal compound (solid-phase sintered) in which the Bi-Te alloy powder constituting the N-type maintains a predetermined crystal structure of a plurality of metal atoms before sintering. Sintered alloy).
- the electromotive voltage can be increased by using a metal compound that is solid-phase sintered so as to maintain a predetermined crystal structure as the first and second interlayer connection members 130 and 140.
- the back surface protection member 110 is disposed on the back surface 100 b of the insulating base material 100.
- the back surface protection member 110 is configured by a planar rectangular thermoplastic resin film represented by, for example, polyether ether ketone (PEEK), polyether imide (PEI), and liquid crystal polymer (LCP).
- PEEK polyether ether ketone
- PEI polyether imide
- LCP liquid crystal polymer
- the back surface protection member 110 has the same planar shape as the insulating base material 100, and a plurality of back surface patterns 111 in which copper foil or the like is patterned on the one surface 110 a side facing the insulating base material 100 are separated from each other. It is formed as follows.
- Each back pattern 111 is appropriately electrically connected to the first and second interlayer connection members 130 and 140, respectively.
- first interlayer connection member 130 and one second interlayer connection member 140 when one adjacent first interlayer connection member 130 and one second interlayer connection member 140 are set as a set 150, the first, The second interlayer connection members 130 and 140 are connected to the same back surface pattern 111. That is, the first and second interlayer connection members 130 and 140 of each set 150 are electrically connected via the back surface pattern 111.
- one first interlayer connection member 130 and one second interlayer connection member 140 that are adjacent along the longitudinal direction X of the insulating base material 100 form a set 150.
- the surface protection member 120 is disposed on the surface 100 a of the insulating base material 100.
- the surface protection member 120 is configured by a planar rectangular thermoplastic resin film represented by, for example, polyetheretherketone (PEEK), polyetherimide (PEI), and liquid crystal polymer (LCP).
- PEEK polyetheretherketone
- PEI polyetherimide
- LCP liquid crystal polymer
- the surface protection member 120 has the same planar shape as the insulating base material 100, and a plurality of copper foils or the like patterned on the one surface 120 a side facing the insulating base material 100.
- the surface pattern 121 and the two connection patterns 122 are formed so as to be separated from each other. Each surface pattern 121 and the two connection patterns 122 are appropriately electrically connected to the first and second interlayer connection members 130 and 140, respectively.
- the first interlayer connection member 130 of one set 150 and the second of the other set 150 in the set 150 adjacent to the longitudinal direction X of the insulating base material 100, the first interlayer connection member 130 of one set 150 and the second of the other set 150.
- the interlayer connection member 140 is connected to the same surface pattern 121. That is, the first and second interlayer connection members 130 and 140 are electrically connected via the same surface pattern 121 across the set 150.
- the first and second interlayer connection members 130, 140 that are adjacent along the direction Y orthogonal to the longitudinal direction X are basically at the outer edge of the insulating base material 100.
- the adjacent first and second interlayer connecting members 130 and 140 are the same so that those connected in series via the front surface pattern 121 and the back surface pattern 111 are folded in the longitudinal direction X of the insulating base material 100. It is connected to the surface pattern 121.
- the first and second interlayer connection members 130 and 140 are the ends of the serially connected members as described above.
- the member 130 and the second interlayer connection member 140 on the upper right side of the drawing are connected to the connection pattern 122.
- the heat transfer element 50 is disposed on the heat flux sensor 40, and a portion facing the heat transfer element 50 (portion located immediately below) is shown as a region A in FIG. 3.
- the two connection patterns 122 are drawn out to the outside of the region A at the ends opposite to the sides connected to the first and second interlayer connection members 130 and 140, respectively.
- a portion facing the heat transfer element 50 portion located immediately below is shown as region A.
- the surface protection member 120 is formed with a contact hole 160 that exposes the end of the connection pattern 122 drawn to the outside of the region A.
- the heat flux sensor 40 can be electrically connected to the control unit 60 through the contact hole 160.
- the above is the configuration of the heat flux sensor 40 in the present embodiment.
- the electromotive force generated in the first and second interlayer connection members 130 and 140 alternately connected in series changes. Therefore, the electromotive voltage is output to the control unit 60 as a detection signal.
- the thickness direction Z of the heat flux sensor 40 is the stacking direction of the insulating base material 100, the surface protection member 120, and the back surface protection member 110.
- Such a heat flux sensor 40 is manufactured by a so-called PALAP (registered trademark) manufacturing method, although not particularly illustrated. That is, first, the first and second via holes 101 and 102 are formed in the insulating base material 100, and the conductive paste constituting the first and second interlayer connection members 130 and 140 in the first and second via holes 101 and 102 is formed. Fill. Next, the back surface protection member 110 on which the back surface pattern 111 is formed, and the front surface protection member 120 on which the surface pattern 121 and the connection pattern 122 are formed are prepared.
- PALAP registered trademark
- the back surface protection member 110, the insulating base material 100, and the surface protection member 120 are laminated in order so that the conductive paste filled in the first and second via holes 101 and 102 appropriately contacts the surface pattern 121 and the back surface pattern 111.
- a laminated body is configured. Then, while heating a laminated body, it pressurizes in the lamination direction (thickness direction Z), and while integrating the back surface protection member 110, the insulating base material 100, and the surface protection member 120, it is 1st, 2nd interlayer from an electrically conductive paste. It is manufactured by configuring the connection members 130 and 140.
- the said heat flux sensor 40 is on 2nd temperature sensor 30 (outer wall surface of the piping 10) via the heat conductive member 70 arrange
- the heat conductive member 70 is made of a heat conductive material such as grease or gel sheet and has flexibility, and is disposed along the outer wall surface of the pipe 10 and opposite to the pipe 10. The side has a shape (surface) along the pipe 10.
- the heat flux sensor 40 is disposed via the heat conductive member 70 so that the back surface protection member 110 side becomes the heat conductive member 70 side and no gap (space) is formed between the pipe 10 and the outer wall surface.
- the heat conductive member 70 is disposed so as to completely seal between the heat flux sensor 40 and the outer wall surface of the pipe 10 (second temperature sensor 30).
- the heat flux sensor 40 is flexible because the insulating base material 100, the surface protection member 120, and the back surface protection member 110 are made of a thermoplastic resin as described above. For this reason, it arrange
- the heat transfer element 50 is configured by an electric heater or the like that generates heat when energized, and is disposed on the heat flux sensor 40.
- the heat transfer element 50 is disposed on the outer wall surface of the pipe 10 such that the heat flux sensor 40 is disposed between the heat transfer element 50 and the outer wall surface of the pipe 10.
- the heat transfer element 50 heats the portion facing the heat transfer element 50 on the outer wall surface of the pipe 10 and the vicinity of the portion via the heat flux sensor 40, the heat conductive member 70, and the second temperature sensor 30. As a result, heat is exchanged with the measurement medium.
- the second temperature sensor 30 detects the temperature of the portion heated by the heat transfer element 50 on the outer wall surface of the pipe 10, and the heat flux sensor 40 detects between the heat transfer element 50 and the outer wall surface of the pipe 10.
- the heat flux of is detected directly.
- the 1st temperature sensor 20 is arrange
- the heat transfer element 50 has a rectangular shape in which the planar shape dimension is smaller than that of the heat flux sensor 40 as shown in FIGS. And when it sees from the lamination direction of the said heat transfer element 50 and the heat flux sensor 40, the heat transfer element 50 is arrange
- a heat insulating member 80 made of glass wool or urethane foam is disposed so as to cover the first temperature sensor 20 and the second temperature sensor 30, the heat flux sensor 40, the heat transfer element 50, and the heat conductive member 70. Yes.
- the heat insulating member 80 an annular member that covers the first temperature sensor 20 and the second temperature sensor 30, the heat flux sensor 40, the heat transfer element 50, the heat conductive member 70, and the pipe 10 is illustrated.
- the first temperature sensor 20 and the second temperature sensor 30, the heat flux sensor 40, the heat transfer element 50, the heat conductive member 70, and the one that covers only a predetermined portion of the pipe 10 where these are arranged may be used. .
- the control unit 60 is configured using a CPU, various memories constituting the storage means, peripheral devices, and the like.
- the control unit 60 performs a predetermined process to detect the flow rate of the measurement medium flowing in the passage 11 of the pipe 10. Specifically, when detection signals detected by the first temperature sensor 20, the second temperature sensor 30, and the heat flux sensor 40 are input, the measurement medium that flows in the passage 11 of the pipe 10 using these detection signals. Detect the flow rate.
- the control unit 60 corresponds to the control unit of the present invention.
- the thermal flow sensor As described above, when the heat transfer element 50 generates heat, a portion (a portion located immediately below) of the pipe 10 facing the heat transfer element 50 and the vicinity of the portion are heated. Then, the heat generated in the heat transfer element 50 is transmitted to the pipe 10 via the heat flux sensor 40 (the heat flux passes through the heat flux sensor 40). Therefore, a detection signal corresponding to the heat flux passing through the heat flux sensor 40 is output from the heat flux sensor 40 to the control unit 60. That is, the heat flux between the heat flux sensor 40 and the outer wall surface of the pipe 10 is directly detected by the heat flux sensor 40.
- a detection signal corresponding to the temperature of the portion of the outer wall surface of the pipe 10 that is not heated by the heat transfer element 50 is output from the first temperature sensor 20 to the control unit 60. Then, a detection signal corresponding to the temperature of the portion of the outer wall surface of the pipe 10 that is heated by the heat transfer element 50 is output from the second temperature sensor 30 to the control unit 60.
- the heat flux detected by the heat flux sensor 40 is Q
- the heat transfer rate from the pipe 10 to the measurement medium is h
- the temperature of the measurement medium is T1
- the temperature of the portion of the outer wall surface of the pipe 10 that is not heated by the heat transfer element 50 can be regarded as being equal to the temperature of the measurement medium. That is, the first temperature sensor 20 detects the temperature T1 of the measurement medium.
- the control unit 60 first calculates the heat transfer coefficient h using the detected heat flux Q, the temperature T1 of the measurement medium, and the wall surface temperature T2 of the heated portion. Further, since the heat transfer rate h and the flow rate of the measurement medium have a correlation, the flow rate is calculated from the correlation between the calculated heat transfer rate h and the flow rate of the measurement medium. And the flow volume of a measurement medium is calculated by calculating (multiplication) based on the cross-sectional area of the piping 10 which is a regulation value, and the flow velocity of a measurement medium. As described above, the flow rate of the measurement medium is calculated.
- the heat transfer element 50 has a rectangular shape in which the planar shape dimension is smaller than that of the heat flux sensor 40.
- the heat transfer element 50 is disposed so as to be located in the heat flux sensor 40 when viewed from the stacking direction (thickness direction Z) of the heat transfer element 50 and the heat flux sensor 40. For this reason, it can further suppress that the detection accuracy of the heat flux sensor 40 falls.
- the heat transfer element 50 has a rectangular shape whose planar shape dimension is smaller than that of the heat flux sensor 40.
- the heat transfer element 50 is disposed so as to be located in the heat flux sensor 40 when viewed from the stacking direction (thickness direction Z) of the heat transfer element 50 and the heat flux sensor 40. For this reason, since the heat generated in the heat transfer element 50 passes through the heat flux sensor 40 evenly, it is possible to suppress a decrease in detection accuracy.
- a heat conductive member 70 is arranged between the heat flux sensor 40 and the pipe 10 so as not to form a gap (space). For this reason, the heat generated in the heat transfer element 50 is uniformly transmitted to the pipe 10 through the heat flux sensor 40 and the heat conductive member 70. As a result, it can suppress that the detection accuracy of the heat flux sensor 40 falls. Further, the heat generated in the heat transfer element 50 is evenly transmitted to the pipe 10 via the heat flux sensor 40 and the heat conductive member 70. As a result, it is possible to suppress an error between the temperature of the heated portion on the outer wall surface of the pipe 10 and the heat flux passing through the heat flux sensor 40.
- the heat flux sensor 40 is disposed between the heat transfer element 50 and the outer wall surface of the pipe 10, and the heat flux between the heat transfer element 50 and the pipe 10 is converted into the heat flux sensor. 40 is directly detected. For this reason, it can suppress that the detection accuracy of a heat flux falls, and can suppress that the detection accuracy of the flow volume of a measurement medium falls.
- the heat transfer element 50 has a rectangular shape whose planar shape is smaller than that of the heat flux sensor 40. Further, the heat transfer element 50 is disposed so as to be positioned in the heat flux sensor 40 when viewed from the stacking direction (thickness direction Z) of the heat transfer element 50 and the heat flux sensor 40. For this reason, the heat generated in the heat transfer element 50 passes through the heat flux sensor 40 evenly. As a result, it is possible to suppress a decrease in detection accuracy of the heat flux sensor 40 as compared with a case where the end portion forming the outer shape of the heat transfer element 50 protrudes from the heat flux sensor 40.
- the heat flux sensor 40 is directly disposed on the outer wall surface of the pipe 10. That is, in the present embodiment, the heat conductive member 70 is not disposed between the heat flux sensor 40 and the pipe 10.
- the second temperature sensor 30 is disposed in the vicinity of the heat flux sensor 40. Specifically, the second temperature sensor 30 is not disposed in a portion facing the heat transfer element 50 on the outer wall surface of the pipe 10. However, the 2nd temperature sensor 30 is arrange
- the 2nd temperature sensor 30 is a location which can detect the temperature of the part heated with the heat transfer element 50 in the outer wall surface of the piping 10, the part which opposes the heat transfer element 50 in the outer wall surface of the pipe 10 It does not need to be arranged. Further, when the second temperature sensor 30 is arranged in this way, the heat flux sensor 40 can be arranged directly on the pipe 10, so that the heat conductive member 70 need not be arranged, and the number of parts can be reduced. Can be achieved.
- the second temperature sensor 30 is integrated with the heat flux sensor 40 as shown in FIGS. Specifically, the second temperature sensor 30 is disposed between the insulating base material 100 and the back surface protection member 110 and is located in the region A. In FIG. 7, the rear surface protection member 110 is omitted for easy understanding. In FIG. 8, the surface protection member 120 is omitted for easy understanding. Further, although FIGS. 7 and 8 are not sectional views, the first and second interlayer connection members 130 and 140 and a third interlayer connection member 170 described later are hatched.
- the third via hole 103 similar to the first and second via holes 101 and 102 is formed in the insulating base material 100. Similar to the first and second interlayer connection members 130 and 140, a third interlayer connection member 170 made of sintered metal is disposed in the third via hole 103. The third via hole 103 is formed so as to expose the second temperature sensor 30, and the third interlayer connection member 170 is disposed so as to be electrically connected to the second temperature sensor 30.
- connection patterns 123 similar to the connection pattern 122 are formed on the surface protection member 120.
- the connection pattern 123 the end opposite to the side connected to the third interlayer connection member 170 is drawn to the outside of the region A.
- the surface protection member 120 is formed with a contact hole 161 that exposes the end portion of the extracted connection pattern 123, as with the contact hole 160.
- the heat flux sensor 40 can be electrically connected to the control unit 60 through the contact hole 161.
- the configuration of the third interlayer connection member 170 may be the same as that of the first and second interlayer connection members 130 and 140, but the third interlayer connection member 170 is connected to the second temperature sensor 30 and the connection pattern. As long as it can be electrically connected to 123, it can be changed as appropriate.
- the back surface protection member 110 side of the heat flux sensor 40 is opposed to the outer wall surface of the pipe 10. It is directly arranged on the outer wall surface of the pipe 10.
- the second temperature sensor 30 and the heat flux sensor 40 are integrated. Therefore, when attaching the 2nd temperature sensor 30 and the heat flux sensor 40 to the outer wall surface of the piping 10, the said 1st Embodiment is suppressed, suppressing that the position shift of the 2nd temperature sensor 30 and the heat flux sensor 40 generate
- the first temperature sensor 20 is integrated with the heat flux sensor 40 together with the second temperature sensor 30. Specifically, the first temperature sensor 20 is disposed between the insulating base material 100 and the back surface protection member 110 so as to be located outside the region A.
- the first temperature sensor 20 is disposed outside the region A and at a position sufficiently separated from the region A so as not to be affected by the heat transfer element 50.
- the back surface protection member 110 is omitted for easy understanding.
- the surface protection member 120 is omitted for easy understanding.
- 10 and 11 are not cross-sectional views, but the first to third interlayer connection members 130, 140, 170 and a fourth interlayer connection member 180 described later are hatched.
- a fourth via hole 104 similar to the first to third via holes 101 to 103 is formed. Similar to the first to third interlayer connection members 130, 140, and 170, a fourth interlayer connection member 180 that is a sintered metal is disposed in the fourth via hole 104. The fourth via hole 104 is formed so as to expose the first temperature sensor 20, and the fourth interlayer connection member 180 is disposed so as to be electrically connected to the first temperature sensor 20.
- connection patterns 124 similar to the connection patterns 122 and 123 are formed on the surface protection member 120.
- connection pattern 124 the end opposite to the side connected to the fourth interlayer connection member 180 is drawn out of the region A.
- a contact hole 162 that exposes the end of the drawn connection pattern 124 is formed.
- the electrical connection with the control unit 60 can be achieved through the contact hole 162.
- the fourth interlayer connection member 180 may have the same configuration as the first and second interlayer connection members 130 and 140. However, the fourth interlayer connection member 180 can be appropriately changed as long as it can electrically connect the first temperature sensor 20 and the connection pattern 124.
- the back surface protection member 110 side of the heat flux sensor 40 is the outer wall surface in the pipe 10.
- the first temperature sensor 20 is disposed upstream of the second temperature sensor 30 in the flow direction of the measurement medium.
- the 1st temperature sensor 20, the 2nd temperature sensor 30, and the heat flux sensor 40 are integrated. Therefore, when attaching the 1st temperature sensor 20, the 2nd temperature sensor 30, and the heat flux sensor 40 to the outer wall surface of the piping 10, the position shift of the 1st temperature sensor 20, the 2nd temperature sensor 30, and the heat flux sensor 40 generate
- the heat transfer element 50 includes an insulating substrate 200, a back surface protection member 210, a back surface pattern 211, a surface protection member 220, a surface pattern 221, a connection pattern 222, and first and second interlayer connection members 230 and 240.
- the basic configuration of the heat transfer element 50 is the same as that of the heat flux sensor 40 described with reference to FIGS.
- the surface protection member 220 is formed with a contact hole 260 that exposes an end portion of the connection pattern 222.
- heat transfer element 50 When such a heat transfer element 50 is energized from the control unit 60 via the connection pattern 222, it is radiated (heated) from one surface side of the back surface protection member 210 side and the surface protection member 220 side, and the other side Heat is absorbed (cooled) on the surface side. That is, the heat transfer element 50 of the present embodiment uses the Peltier effect. In addition, such a heat transfer element 50 can set heating and cooling by adjusting an energization direction. Therefore, heating and cooling can be changed by adjusting the energization direction according to the application. That is, in the heat transfer element 50 of the present embodiment, the outer wall surface of the pipe 10 can be heated or cooled with a common element. The above is the configuration of the heat transfer element 50 in the present embodiment.
- the heat flux sensor 40 and the heat transfer element 50 are integrated so that the surface protection member 120 of the heat flux sensor 40 and the back surface protection member 210 of the heat transfer element 50 face each other.
- the heat flux sensor 40 and the heat transfer element 50 are formed on a common substrate including the back surface protection member 110, the insulating base material 100, the surface protection member 120, the back surface protection member 210, the insulating base material 200, and the surface protection member 220. And are formed.
- FIG. 13 is a view corresponding to a cross section of a portion different from that in FIG. 4, and the heat flux sensor 40 is formed so as to penetrate the heat transfer element 50 in a cross section different from that in FIG.
- the connection pattern 122 is exposed through the contact hole (not shown).
- the heat flux sensor 40 can be electrically connected to the control unit 60 through the contact hole.
- the planar shape dimension of the heat flux sensor 40 and the planar shape dimension of the heat transfer element 50 are equal.
- the heat transfer element 50 has a heat flux. It can be said that it is located in the sensor 40.
- Such a heat flux sensor 40 and the heat transfer element 50 include a back surface protection member 110 that constitutes the heat flux sensor 40, an insulating base material 100, a surface protection member 120, a back surface protection member 210 that constitutes the heat transfer element 50, and an insulation base.
- the material 200 and the surface protection member 220 are laminated in order to form a laminate, and the laminate is integrally manufactured by applying pressure while heating.
- the heat flux sensor 40 and the heat transfer element 50 are integrated. Therefore, when the heat flux sensor 40 and the heat transfer element 50 are attached to the pipe 10, the same effect as that of the first embodiment can be achieved while suppressing the occurrence of positional deviation between the heat flux sensor 40 and the heat transfer element 50. Obtainable.
- the surface protection member 120 of the heat flux sensor 40 and the back surface protection member 210 of the heat transfer element 50 are configured by different members, but the surface protection member 120 of the heat flux sensor 40 and The back surface protection member 210 of the heat transfer element 50 may be shared.
- the first temperature sensor 20 is disposed apart from the second temperature sensor 30 (heat transfer element 50) in the circumferential direction of the pipe 10.
- FIG. 14 is a schematic plan view of the pipe 10 as viewed from the outer wall surface side, in which the heat insulating member 80 is omitted.
- the first temperature sensor 20 can detect the temperature of the portion of the outer wall surface of the pipe 10 that is not heated by the heat transfer element 50. 30 (heat transfer element 50) is sufficiently spaced apart.
- the first temperature sensor 20 is arranged so as to be separated from the heat transfer element 50 in the circumferential direction of the pipe 10. Therefore, when the annular heat insulating member 80 is disposed so as to cover the first temperature sensor 20 and the second temperature sensor 30, the heat flux sensor 40, the heat transfer element 50, and the pipe 10 in the circumferential direction, The length in the flow direction can be shortened. As a result, the usage amount of the heat insulating member 80 as a whole can be reduced.
- the configuration of the heat flux sensor 40 is not limited to that described above, and may be a configuration of a heat flux sensor using a thermopile, for example.
- the heat transfer element 50 may cool the outer wall surface of the pipe 10.
- the 2nd temperature sensor 30 demonstrated what was arrange
- the 2nd temperature sensor 30 is the heat flux sensor 40, and the thing. It only needs to be integrated.
- the second temperature sensor 30 may be integrated with the heat flux sensor 40 by being disposed on the opposite side of the back surface protection member 110 from the insulating base material 100 side.
- the first temperature sensor 20 has been described as being disposed between the insulating substrate 100 and the back surface protection member 110, but the first temperature sensor 20 is the heat flux sensor 40. It only has to be integrated.
- the first temperature sensor 20 may be integrated with the heat flux sensor 40 by being disposed on the side of the back surface protection member 110 opposite to the insulating substrate 100 side.
- the second temperature sensor 30 may not be integrated with the heat flux sensor 40.
- the above embodiments can be combined as appropriate.
- the second embodiment may be combined with the third and fourth embodiments, and the second temperature sensor 30 may be disposed outside the region A.
- the second embodiment may be combined with the fifth and sixth embodiments, and the second temperature sensor 30 may be disposed in the vicinity of the portion facing the heat transfer element 50 on the outer wall surface of the pipe 10.
- the third and fourth embodiments may be combined with the fifth and sixth embodiments, and the heat flux sensor 40, the first temperature sensor 20, and the second temperature sensor 30 may be integrated as appropriate.
- the fifth embodiment may be combined with the sixth embodiment so that the heat flux sensor 40 and the heat transfer element 50 are integrated. Further, combinations of the above embodiments may be combined as appropriate.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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- Manufacturing & Machinery (AREA)
- Measuring Volume Flow (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
本発明の第1実施形態について説明する。本実施形態の熱式流量センサは、配管10内を流れる測定媒体の流量を検出するものであり、図1に示すように、温度を検出する第1温度センサ20および第2温度センサ30と、熱流束を検出する熱流束センサ40と、配管10を加熱する伝熱素子50と、制御部60とを備えている。
本発明の第2実施形態について説明する。本実施形態は、第1実施形態に対して第2温度センサ30の配置箇所を変更したものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明の第3実施形態について説明する。本実施形態は、第1実施形態に対して第2温度センサ30と熱流束センサ40とを一体化したものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明の第4実施形態について説明する。本実施形態は、第3実施形態に対して第1温度センサ20も熱流束センサ40と一体化したものであり、その他に関しては第3実施形態と同様であるため、ここでは説明を省略する。
本発明の第5実施形態について説明する。本実施形態は、第1実施形態に対して熱流束センサ40と伝熱素子50とを一体化したものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明の第6実施形態について説明する。本実施形態は、第1実施形態に対して第1温度センサ20の配置箇所を変更したものであり、その他に関しては第1実施形態と同様であるため、ここでは説明を省略する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
11 通路
20 第1温度センサ
30 第2温度センサ
40 熱流束センサ
50 伝熱素子
60 制御部
Claims (7)
- 配管(10)における外壁面のうちの所定箇所の温度を検出することによって前記配管内の通路(11)を流れる測定媒体の温度を検出する第1温度センサ(20)と、
前記第1温度センサと離間した状態で前記配管の外壁面上に配置され、前記配管の外壁面を加熱または冷却することにより、前記測定媒体と熱の授受を行う伝熱素子(50)と、
前記配管の外壁面における前記伝熱素子によって加熱または冷却された部分の温度を検出する第2温度センサ(30)と、
所定の処理を行う制御部(60)と、を備え、
前記伝熱素子と前記配管の外壁面との間には、前記伝熱素子と前記配管との間の熱流束を検出する熱流束センサ(40)が配置されており、
前記制御部は、前記第1温度センサで検出された温度、前記第2温度センサで検出された温度、前記熱流束センサで検出された熱流束に基づいて、前記測定媒体の流量を検出することを特徴とする熱式流量センサ。 - 前記伝熱素子は、前記熱流束センサと前記伝熱素子との積層方向から視たとき、前記熱流束センサ内に位置していることを特徴とする請求項1に記載の熱式流量センサ。
- 前記熱流束センサは、熱可塑性樹脂にて構成される絶縁基材(100)に厚さ方向(Z)に貫通する複数の第1、第2ビアホール(101、102)が形成されていると共に、前記第1、第2ビアホールに互いに異なる金属で形成された第1、第2層間接続部材(130、140)が埋め込まれ、かつ、前記絶縁基材の表面(100a)に表面パターン(121)が形成されていると共に、前記表面と反対側の裏面(100b)に裏面パターン(111)が形成され、前記第1、第2層間接続部材が前記表面パターンおよび前記裏面パターンを介して交互に直列接続された構成とされていることを特徴とする請求項1または2に記載の熱式流量センサ。
- 前記第2温度センサは、前記熱流束センサと一体化されていることを特徴とする請求項3に記載の熱式流量センサ。
- 前記第1温度センサは、前記熱流束センサと一体化されていることを特徴とする請求項3または4に記載の熱式流量センサ。
- 前記伝熱素子は、熱可塑性樹脂にて構成される絶縁基材(200)に厚さ方向(Z)に貫通する複数の第1、第2ビアホール(201、202)が形成されていると共に、前記第1、第2ビアホールに互いに異なる金属で形成された第1、第2層間接続部材(230、240)が埋め込まれ、かつ、前記絶縁基材の表面(200a)に表面パターン(221)が形成されていると共に、前記表面と反対側の裏面(200b)に裏面パターン(211)が形成され、当該第1、第2層間接続部材が前記表面パターンおよび前記裏面パターンを介して交互に直列接続された構成とされており、前記熱流束センサと一体化されていることを特徴とする請求項3ないし5のいずれか1つに記載の熱式流量センサ。
- 前記第1温度センサは、前記伝熱素子と前記配管の周方向に離間して配置されることを特徴とする請求項1ないし6のいずれか1つに記載の熱式流量センサ。
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CN201680013067.6A CN107430019B (zh) | 2015-03-02 | 2016-02-08 | 热式流量传感器 |
EP16758714.6A EP3267162A4 (en) | 2015-03-02 | 2016-02-08 | Thermal flow rate sensor |
US15/554,112 US10458825B2 (en) | 2015-03-02 | 2016-02-08 | Thermal flow-rate sensor |
KR1020177024486A KR101902828B1 (ko) | 2015-03-02 | 2016-02-08 | 열식 유량 센서 |
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EP3267162A4 (en) | 2018-04-11 |
KR101902828B1 (ko) | 2018-10-01 |
US10458825B2 (en) | 2019-10-29 |
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JP6380168B2 (ja) | 2018-08-29 |
JP2016161415A (ja) | 2016-09-05 |
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US20180038722A1 (en) | 2018-02-08 |
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CN107430019A (zh) | 2017-12-01 |
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