CN110455428B - Pulsating heat pipe temperature difference sensor and method using magnetic liquid as working medium - Google Patents
Pulsating heat pipe temperature difference sensor and method using magnetic liquid as working medium Download PDFInfo
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- CN110455428B CN110455428B CN201910785406.8A CN201910785406A CN110455428B CN 110455428 B CN110455428 B CN 110455428B CN 201910785406 A CN201910785406 A CN 201910785406A CN 110455428 B CN110455428 B CN 110455428B
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils
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Abstract
The invention relates to a pulsating heat pipe temperature difference sensor and a method using magnetic liquid as a working medium, belonging to the technical field of temperature difference sensors. The device comprises a pulsating heat pipe, working medium magnetic liquid and non-magnetic gas which are communicated in a single loop, wherein the working medium magnetic liquid and the non-magnetic gas are filled in a central cavity of the pulsating heat pipe at intervals; the outer wall cladding of the middle part of the pulsating heat pipe of single loop intercommunication is provided with the heat preservation and the heat preservation is located induction coil's the outside, fills between heat preservation and the pulsating heat pipe and is equipped with the packing heat insulation layer. The device has low cost and simple structure, and the temperature difference measurement between different materials is realized by utilizing the induced current generated by the magnetic liquid through the induction coil to generate induced voltage, thereby being safe and reliable.
Description
Technical Field
The invention relates to a pulsating heat pipe temperature difference sensor and a method using magnetic liquid as a working medium, belonging to the technical field of temperature difference sensors.
Background
At present, devices for measuring temperature difference comprise a thermocouple gauge, a Beckman type differential thermometer, an IC temperature sensor and the like, and the temperature difference devices have some defects in chemical production, including the conditions of low precision and unreliability of the thermocouple and the thermistor; the temperature measuring range of the Beckman thermometer is limited; the IC temperature sensor needs an external power supply and is used in a more complicated situation.
Disclosure of Invention
The invention provides a pulsating heat pipe temperature difference sensor and a method using magnetic liquid as a working medium, aiming at the problem of a temperature difference sensor in the prior art, the invention discloses a single-loop closed-loop pulsating heat pipe filled with a magnetic liquid working medium, a section of induction coil wound on the pulsating heat pipe and an external load loop connected with the induction coil; when the temperature difference is generated between the cold end and the hot end of the pulsating heat pipe, a magnetic liquid working medium in the pulsating heat pipe is pushed to flow, and when the magnetic liquid passes through an induction coil on the pulsating heat pipe, induced current is generated on the induction coil due to different magnetic fluxes of the magnetic liquid at different positions; the induced current can be connected with an external temperature sensor to detect the temperature difference of certain reaction materials in chemical reaction.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a pulsating heat pipe temperature difference sensor using magnetic liquid as a working medium comprises a pulsating heat pipe 1, a working medium magnetic liquid 2 and a non-magnetic gas which are communicated in a single loop, wherein the working medium magnetic liquid 2 and the non-magnetic gas are filled in a central cavity of the pulsating heat pipe 1 at intervals, an induction coil 7 is wound on the outer wall of the middle part of the pulsating heat pipe 1, and the induction coil 7 is externally connected with a load circuit 8 to form an electric loop; the outer wall cladding of the middle part of the pulsating heat pipe 1 of single loop intercommunication is provided with the heat preservation 5 and the heat preservation 5 is located the outside of induction coil 7, fills between heat preservation 5 and the pulsating heat pipe 1 and is equipped with and fills heat insulation 6.
Further, the length that I, II, the pulse of violently managing II are violently managed to the pulse I, the pulse standpipe I, the pulse is violently managed II, the pulse standpipe II and is communicated in proper order and form "returning" style of calligraphy single loop structure.
Or, pulsation heat pipe 1 is including the pulsation violently manage I, the pulsation violently manages II, the pulsation violently manages III, the pulsation violently manages IV, pulsation standpipe I, pulsation arc pipe II, pulsation arc pipe III, the pulsation violently manages I, the pulsation violently manages II, the pulsation violently manages III, the pulsation violently manages IV parallel arrangement and the pulsation violently manages III, the pulsation violently manages IV and is located the pulsation violently between pipe I and the pulsation violently pipe II, the pulsation violently manages I and the pulsation violently manages II parallel arrangement, the pulsation violently manages I and the pulsation violently manages II and communicate through pulsation standpipe I, the pulsation violently manages I, the pulsation arc pipe I, the pulsation violently manages III, the pulsation violently manages II, the pulsation violently pipe IV, the pulsation arc.
And the induction coil 7 is wound at the middle part of the pulsating transverse pipe II.
The distance between the end of the induction coil 7 and the end of the pulsating transverse pipe II is 1/4-1/5 of the length of the pulsating transverse pipe II.
The diameter of the pulsating heat pipe 1 is 0.5 mm-3 mm, and the lengths of the working medium magnetic liquid 2 in the pulsating heat pipe 1 are randomly distributed.
Furthermore, the temperature difference display is a voltmeter, and the electronic trigger is a trigger switch.
The heat preservation layer 5 and the filling heat insulation layer 6 are detached and replaced at any time according to different reaction materials.
The pulsating heat pipe temperature difference sensor using magnetic liquid as working medium can be directly integrated and installed in a storage tank or a reactant material pool, and heat insulation layers made of different materials or pulsating heat pipes made of different materials can be used according to different conditions of actual production during processing and use.
The pulsating heat pipe temperature difference sensing method with magnetic liquid as a working medium adopts a pulsating heat pipe temperature difference sensor with magnetic liquid as a working medium, and comprises the following specific steps:
(1) two ends of a pulsating heat pipe temperature difference sensor, which are not coated with an insulating layer, of the pulsating heat pipe are respectively arranged in a material A and a material B, and a pulsating transverse pipe I and a pulsating transverse pipe II of the pulsating heat pipe are positioned on the same horizontal plane;
(2) the materials A and B respectively transfer heat to the working medium magnetic liquid in the pulsating heat pipe to enable the working medium magnetic liquid to expand and partially gasify, the working medium magnetic liquid in the pulsating heat pipe is heated unevenly due to the temperature difference between the materials A and B, and the pressure difference between the pulsating heat pipe end of the material A and the pulsating heat pipe end of the material B is increased by the working medium magnetic liquid sections which are distributed randomly, so that the working medium magnetic liquid is pushed to pulsate irregularly;
(3) the working medium magnetic liquid flows through an induction coil of the pulsating transverse pipe II to generate induction current and provide electric energy for an external load circuit, the current flows through a temperature signal sensor, a signal amplifier, an electronic trigger, a one-way crystal diode, an alarm, a switch and a temperature difference display, the temperature signal sensor converts a temperature difference signal into an electric signal, the current reduces errors caused by time delay on temperature test through a capacitor, the electric signal is amplified by the signal amplifier, and then the temperature difference between the material A and the material B is displayed by the temperature difference display; when the voltage exceeds a preset value, the electronic trigger is triggered to be closed, and the current triggers the alarm to give an alarm through the one-way diode.
The invention has the beneficial effects that:
(1) the invention relates to a single-loop closed-loop pulsating heat pipe filled with a magnetic liquid working medium, a section of induction coil wound on the pulsating heat pipe and an external load loop connected with the induction coil; when the temperature difference is generated between the cold end and the hot end of the pulsating heat pipe, a magnetic liquid working medium in the pulsating heat pipe is pushed to flow, and when the magnetic liquid passes through an induction coil on the pulsating heat pipe, induced current is generated on the induction coil due to different magnetic fluxes of the magnetic liquid at different positions; the induced current can be connected with an external temperature sensor to detect the temperature difference of certain reaction materials in chemical reaction;
(2) the invention can be integrated in a material pool or a storage tank in chemical production, is reliable to use and does not need external energy supply. The integrated miniaturized pulsating heat pipe is used for one-step molding, the heat insulation layer and the filling material can be disassembled and assembled at any time, and the device is convenient to use; the method is applied to controlling the temperature difference of reaction materials in the industrial production or chemical process production process.
Drawings
FIG. 1 is a schematic structural diagram of a pulsating heat pipe temperature difference sensor using magnetic liquid as a working medium in example 1;
FIG. 2 is a schematic view of a pulsating heat pipe structure according to embodiment 1;
FIG. 3 is a schematic view of a pulsating heat pipe structure according to embodiment 2;
FIG. 4 is a schematic diagram of the pulsating heat pipe, the induction coil, and the load circuit;
FIG. 5 is a schematic diagram of the combination of the pulsating heat pipe, the insulating layer 5 and the filling and insulating layer 6;
FIG. 6 is a load circuit diagram;
in the figure: 1-pulsating heat pipe, 2-magnetic liquid, 3-material A, 4-material B, 5-insulating layer, 6-filling heat insulating layer, 7-induction coil and 8-load circuit.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1: as shown in fig. 1-2 and 4-6, a pulsating heat pipe temperature difference sensor using magnetic liquid as a working medium comprises a pulsating heat pipe 1, a working medium magnetic liquid 2 and a non-magnetic gas which are communicated with a single loop, wherein the working medium magnetic liquid 2 and the non-magnetic gas are filled in a central cavity of the pulsating heat pipe 1 at intervals, an induction coil 7 is wound on the outer wall of the middle part of the pulsating heat pipe 1, and the induction coil 7 is externally connected with a load circuit 8 to form an electric loop; the outer wall of the middle part of the single-loop communicated pulsating heat pipe 1 is coated with a heat insulation layer 5, the heat insulation layer 5 is positioned on the outer side of the induction coil 7, and a filling heat insulation layer 6 is filled between the heat insulation layer 5 and the pulsating heat pipe 1;
the pulsating heat pipe 1 comprises a pulsating transverse pipe I, a pulsating transverse pipe II, a pulsating vertical pipe I and a pulsating vertical pipe II, wherein the pulsating transverse pipe I and the pulsating transverse pipe II are arranged in parallel; the lengths of the pulsation transverse pipe I, the pulsation vertical pipe I, the pulsation transverse pipe II and the pulsation vertical pipe II are equal, and the pulsation transverse pipe I, the pulsation vertical pipe I, the pulsation transverse pipe II and the pulsation vertical pipe II are sequentially communicated to form a 'return' type single-loop structure (see figure 2);
the induction coil 7 is wound on the middle part of the pulsating transverse pipe II;
the distance between the end of the induction coil 7 and the end of the pulsating transverse pipe II is 1/4-1/5 of the length of the pulsating transverse pipe II.
The diameter of the pulsating heat pipe 1 is 0.5 mm-3 mm, and the lengths of the working medium magnetic liquid 2 in the pulsating heat pipe 1 are randomly distributed.
The load circuit 8 comprises a protection resistor, a temperature signal sensor, a capacitor, a signal amplifier, an electronic trigger, a one-way crystal diode, an alarm, a switch and a temperature difference display, wherein two ends of the induction coil 7 are a positive end and a negative end, the positive end and the negative end are serially connected with the protection resistor to form an electric loop I, the positive end is connected with the temperature signal sensor, the other end of the temperature signal sensor is respectively connected with the signal amplifier and the capacitor, the other end of the capacitor is connected with the negative end to form an electric loop II, the other end of the signal amplifier is respectively connected with the temperature difference display and the electronic trigger, the temperature difference display is connected with the negative end to form an electric loop III, and the other end of the electronic trigger is sequentially connected with the one-way crystal diode, the alarm, the switch and the negative end;
the temperature difference display is a voltmeter, and the electronic trigger is a trigger switch;
the heat-insulating layer 5 and the filling heat-insulating layer 6 are detached and replaced at any time according to different reaction materials;
the pulsating heat pipe temperature difference sensor using magnetic liquid as working medium can be directly integrated and installed in a storage tank or a reactant material pool, and heat insulation layers made of different materials or pulsating heat pipes made of different materials can be used according to different conditions of actual production during processing and use.
The pulsating heat pipe temperature difference sensing method with magnetic liquid as a working medium adopts a pulsating heat pipe temperature difference sensor with magnetic liquid as a working medium, and comprises the following specific steps:
(1) two ends of a pulsating heat pipe temperature difference sensor, which are not coated with an insulating layer, of the pulsating heat pipe are respectively arranged in a material A3 and a material B4, and a pulsating transverse pipe I and a pulsating transverse pipe II of the pulsating heat pipe are positioned on the same horizontal plane;
(2) the materials A3 and B4 respectively transfer heat to the working medium magnetic liquid in the pulsating heat pipe to enable the working medium magnetic liquid to expand and be partially gasified, the working medium magnetic liquid in the pulsating heat pipe is heated unevenly due to the temperature difference between the materials A3 and B4, and the pressure difference between the pulsating heat pipe end of the material A3 and the pulsating heat pipe end of the material B4 is increased by the randomly distributed working medium magnetic liquid segments to push the working medium magnetic liquid to pulsate irregularly;
(3) the working medium magnetic liquid flows through an induction coil of the pulsating transverse pipe II to generate induction current and provide electric energy for an external load circuit, the current flows through a temperature signal sensor, a signal amplifier, an electronic trigger, a one-way crystal diode, an alarm, a switch and a temperature difference display, the temperature signal sensor converts a temperature difference signal into an electric signal, the current reduces errors caused by time delay on temperature test through a capacitor, the electric signal is amplified by the signal amplifier, and then the temperature difference between the material A3 and the material B4 is displayed by the temperature difference display; when the voltage exceeds a preset value, the electronic trigger is triggered to be closed, and the current triggers the alarm to give an alarm through the one-way diode.
Example 2: the pulsating heat pipe temperature difference sensor using magnetic liquid as a working medium in the embodiment is basically the same as that in embodiment 1, and the difference is that: 1 structure difference of pulsation heat pipe, it is specific, pulsation heat pipe 1 violently manages I including the pulsation, the pulsation violently manages II, the pulsation violently manages III, the pulsation violently manages IV, pulsation standpipe I, pulsation arc pipe I, the pulsation arc pipe II, the pulsation violently manages I, the pulsation violently manages II, the pulsation violently manages III, the pulsation violently manages IV parallel arrangement and the pulsation violently manage III, the pulsation violently manages IV and is located the pulsation violently between I and the pulsation violently pipe II, the pulsation violently manages I and the pulsation violently manages II parallel arrangement, the pulsation violently manages I and the pulsation violently manages II and communicate through pulsation standpipe I, the pulsation violently manages I, the pulsation arc pipe I, the pulsation violently manages III, the pulsation arc pipe II, the pulsation arc pipe IV, the pulsation violently manages III, the pulsation standpipe I communicates in proper order and forms.
Example 3: monitoring the reaction of the industrial production of the ethyl acetate by adopting the pulsating heat pipe temperature difference sensor which takes the magnetic liquid as the working medium in the embodiment 1;
(1) two ends of a pulsating heat pipe temperature difference sensor, which are not coated with a heat insulation layer, of the pulsating heat pipe are respectively arranged inside an ethanol storage tank A (with the temperature of 35-40 ℃) and an acetic acid storage tank B (with the temperature of 55-65 ℃), and a pulsating transverse pipe I and a pulsating transverse pipe II of the pulsating heat pipe are positioned on the same horizontal plane;
(2) the ethanol storage tank A and the acetic acid storage tank B respectively transfer heat to the working medium magnetic liquid in the pulsating heat pipe to enable the working medium magnetic liquid to expand and partially gasify, the working medium magnetic liquid in the pulsating heat pipe is heated unevenly due to the temperature difference between the ethanol storage tank A and the acetic acid storage tank B, and the pressure difference between the pulsating heat pipe end of the ethanol storage tank A and the pulsating heat pipe end of the acetic acid storage tank B is increased by the working medium magnetic liquid sections which are distributed randomly to push the working medium magnetic liquid to pulsate irregularly;
(3) the working medium magnetic liquid flows through an induction coil of the pulsating transverse pipe II to generate induction current and provide electric energy for an external load circuit, the current flows through a temperature signal sensor, a signal amplifier, an electronic trigger, a one-way crystal diode, an alarm, a switch and a temperature difference display, the temperature signal sensor converts a temperature difference signal into an electric signal, the current reduces errors caused by time delay on temperature test through a capacitor, the electric signal is amplified by the signal amplifier, and the temperature difference (15-25 ℃) between an ethanol storage tank A and an acetic acid storage tank B is displayed by the temperature difference display; when the temperature difference exceeds 25 ℃, the voltage exceeds a preset value, the electronic trigger is triggered to be closed, the current triggers the alarm through the one-way diode to alarm, and the temperature difference monitoring of the ethanol and the acetic acid is realized; when the temperature difference is within a proper range (15-25 ℃), the reaction raw materials (ethanol and acetic acid) in the two storage tanks can be added into the reaction kettle for reaction.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes and modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (9)
1. The utility model provides an use pulsation heat pipe temperature difference sensor of magnetic fluid as working medium which characterized in that: the pulse heat pipe comprises a pulse heat pipe (1), working medium magnetic liquid (2) and non-magnetic gas which are communicated in a single loop, wherein the working medium magnetic liquid (2) and the non-magnetic gas are filled in a central cavity of the pulse heat pipe (1) at intervals, an induction coil (7) is wound on the outer wall of the middle part of the pulse heat pipe (1), and the induction coil (7) is externally connected with a load circuit (8) to form an electric loop; the outer wall of the middle part of the pulsating heat pipe (1) communicated with the single loop is coated with a heat insulation layer (5), the heat insulation layer (5) is positioned on the outer side of the induction coil (7), and a filling heat insulation layer (6) is filled between the heat insulation layer (5) and the pulsating heat pipe (1);
load circuit (8) is including protective resistor, temperature signal sensor, electric capacity, signal amplifier, electronic trigger, one-way crystal diode, the alarm, the switch, the difference in temperature display, induction coil (7) both ends are positive terminal and negative pole end, positive terminal and negative pole end are established ties and are provided with protective resistor and form electric circuit I, the positive terminal is connected with temperature signal sensor, signal amplifier and electric capacity are connected respectively to temperature signal sensor's the other end, the other end and the negative pole end of electric capacity are connected and are formed electric circuit II, temperature difference display and electronic trigger are connected respectively to signal amplifier's the other end, temperature difference display and negative pole end are connected and are formed electric circuit III, electronic trigger's the other end in proper order with one-way crystal diode, the alarm, the switch, negative pole end connection forms electric circuit IV.
2. The pulsating heat pipe temperature difference sensor using magnetic liquid as working medium according to claim 1, wherein: pulsation heat pipe (1) violently manages I including the pulsation, the pulsation violently manages II, pulsation standpipe I, pulsation standpipe II, and the pulsation violently manages I and the pulsation violently manages II parallel arrangement, and pulsation standpipe I and II parallel arrangement of pulsation standpipe, pulsation violently manage I, pulsation standpipe I, the pulsation violently manages II, the pulsation standpipe II communicates in proper order.
3. The pulsating heat pipe temperature difference sensor using magnetic liquid as working medium according to claim 1, wherein: pulsation heat pipe (1) violently manages I including the pulsation, the pulsation violently manages II, the pulsation violently manages III, the pulsation violently manages IV, pulsation standpipe I, pulsation arc pipe II, pulsation arc pipe III, the pulsation violently manages I, the pulsation violently manages II, the pulsation violently manages III, the pulsation violently manages IV parallel arrangement and the pulsation violently manages III, the pulsation violently manages IV and is located the pulsation violently between pipe I and the pulsation violently pipe II, I and the pulsation violently manage II parallel arrangement are violently managed to the pulsation, I and the pulsation violently manage II and communicate through I intercommunication of pulsation standpipe, the pulsation violently manages I, the pulsation arc pipe I, the pulsation violently manages III, the pulsation arc pipe II, the pulsation violently manages IV, the pulsation arc pipe III.
4. The pulsating heat pipe temperature difference sensor using magnetic liquid as a working medium according to claim 2 or 3, wherein: and the induction coil (7) is wound at the middle part of the pulsating transverse pipe II.
5. The pulsating heat pipe temperature difference sensor using magnetic liquid as a working medium according to claim 2 or 3, wherein: the distance between the end of the induction coil (7) and the end of the pulsating transverse pipe II is 1/4-1/5 of the length of the pulsating transverse pipe II.
6. The pulsating heat pipe temperature difference sensor using magnetic liquid as a working medium according to claim 2, wherein: the length that I, pulsation standpipe II were violently managed in the pulsation equals, and I, pulsation standpipe II are violently managed in the pulsation, pulsation standpipe II communicate formation "return" style of calligraphy single loop structure in proper order.
7. The pulsating heat pipe temperature difference sensor using magnetic liquid as working medium according to claim 1, wherein: the diameter of the pulsating heat pipe (1) is 0.5 mm-3 mm, and the lengths of the working medium magnetic liquid (2) in the pulsating heat pipe (1) are randomly distributed.
8. The pulsating heat pipe temperature difference sensor using magnetic liquid as working medium according to claim 7, wherein: the temperature difference display is a voltmeter, and the electronic trigger is a trigger switch.
9. The pulsating heat pipe temperature difference sensing method taking magnetic liquid as a working medium is characterized in that the pulsating heat pipe temperature difference sensor taking the magnetic liquid as the working medium in claim 1 is adopted, and the method comprises the following specific steps:
(1) two ends of a pulsating heat pipe temperature difference sensor, which are not coated with an insulating layer, of the pulsating heat pipe are respectively arranged in a material A and a material B, and a pulsating transverse pipe I and a pulsating transverse pipe II of the pulsating heat pipe are positioned on the same horizontal plane;
(2) the materials A and B respectively transfer heat to the working medium magnetic liquid in the pulsating heat pipe to enable the working medium magnetic liquid to expand and partially gasify, the working medium magnetic liquid in the pulsating heat pipe is heated unevenly due to the temperature difference between the materials A and B, and the pressure difference between the pulsating heat pipe end of the material A and the pulsating heat pipe end of the material B is increased by the working medium magnetic liquid sections which are distributed randomly, so that the working medium magnetic liquid is pushed to pulsate irregularly;
(3) the working medium magnetic liquid flows through an induction coil of the pulsating transverse pipe II to generate induction current and provide electric energy for an external load circuit, the current flows through a temperature signal sensor, a signal amplifier, an electronic trigger, a one-way crystal diode, an alarm, a switch and a temperature difference display, the temperature signal sensor converts a temperature difference signal into an electric signal, the current reduces errors caused by time delay on temperature test through a capacitor, the electric signal is amplified by the signal amplifier, and then the temperature difference between the material A and the material B is displayed by the temperature difference display; when the voltage exceeds a preset value, the electronic trigger is triggered to be closed, and the current triggers the alarm to give an alarm through the one-way diode.
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| CN206001963U (en) * | 2016-08-30 | 2017-03-08 | 惠安东风服装有限公司 | A kind of parallel flow pulsation heat tube |
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| US20080073066A1 (en) * | 2006-09-21 | 2008-03-27 | Foxconn Technology Co., Ltd. | Pulsating heat pipe with flexible artery mesh |
| CN205945481U (en) * | 2016-06-05 | 2017-02-08 | 洛阳文森科技有限公司 | Difference in temperature magnetic current body generator of pulsing |
| CN107883799A (en) * | 2017-08-22 | 2018-04-06 | 南昌大学 | Module combined type pulsating heat pipe |
| CN108199560A (en) * | 2017-12-13 | 2018-06-22 | 南京工业大学 | Thermoelectric conversion device of pulsating heat pipe filled with magnetic liquid |
| CN109945703A (en) * | 2019-02-28 | 2019-06-28 | 北京建筑大学 | Phase-change microcapsule fluid pulsation heat pipe and its system |
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