CN101770678B - Temperature detecting fire alarm device made of thermoelectric materials - Google Patents
Temperature detecting fire alarm device made of thermoelectric materials Download PDFInfo
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- CN101770678B CN101770678B CN201010033610.3A CN201010033610A CN101770678B CN 101770678 B CN101770678 B CN 101770678B CN 201010033610 A CN201010033610 A CN 201010033610A CN 101770678 B CN101770678 B CN 101770678B
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- thermoelectric
- alarm
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- electric transducer
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- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims description 22
- 230000005619 thermoelectricity Effects 0.000 claims description 11
- 229910052797 bismuth Inorganic materials 0.000 claims description 7
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 229910052714 tellurium Inorganic materials 0.000 claims description 4
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052770 Uranium Inorganic materials 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 6
- 230000005678 Seebeck effect Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 description 3
- 230000005676 thermoelectric effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003760 magnetic stirring Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 230000005679 Peltier effect Effects 0.000 description 1
- 230000005680 Thomson effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- ZRHANBBTXQZFSP-UHFFFAOYSA-M potassium;4-amino-3,5,6-trichloropyridine-2-carboxylate Chemical compound [K+].NC1=C(Cl)C(Cl)=NC(C([O-])=O)=C1Cl ZRHANBBTXQZFSP-UHFFFAOYSA-M 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The invention discloses a temperature detecting fire alarm device made of thermoelectric materials, comprising a thermoelectric converter, a signal processing circuit and an alarm, wherein the thermoelectric converter is used for converting variation of the ambient temperature into voltage signals and outputting the voltage signals to the signal processing circuit; the signal processing circuit is used for filtering and comparing the received voltage signals and then driving the alarm to ring, thus realizing alarm on fire; and the alarm is used for sending out an acousto-optic signal to promote alarm. The thermoelectric converter adopts the structure of concatenated thermoelectric pairs. Each group of thermoelectric pairs 5 is equal to a small power supply and that the output voltage is obtained through repeated addition of the voltage of each small power supply can be known according to the power supply concatenation rule in the circuit, thus the fire alarm device is environmentally friendly, without needing transmission parts, and has small system volume and wide temperature application range.
Description
Technical field
The present invention relates to a kind of fire alarm installation, more particularly, refer to a kind of temperature detecting fire alarm device that adopts thermoelectric material to make.
Background technology
Now most of local employed warning system all is smog warning system, but there is too sensitive shortcoming in it, smoke, steams etc. can make alarm equipment alarm, the rate of false alarm that is to say it is too large, and so in the course of time, people have just loosened vigilant, produce general idea for chimes of doom, the problem that therefore solves rate of false alarm just becomes the key of existing fire alarm system.
Need externally fed or use dry cell etc. for the required power supply of smog warning system, if when alarm is not used overlong time after installation, aging circuit can cause to report to the police and lose efficacy.If when adopting dry cell power supply, also can cause the inefficacy of reporting to the police by the long battery failure that causes because of service time.
Summary of the invention
The purpose of this invention is to provide a kind of temperature detecting fire alarm device that adopts thermoelectric material to make, this device utilizes the employed thermoelectric material Bi of heat-electric transducer
2Te
3Inner carrier moving realizes that heat energy and the direct functional material that mutually transforms of electric energy provide the drive source of warning, according to Seebeck effect, the temperature difference that heat-electric transducer exists and the voltage of generation have quantitative relationship C=0.53 Δ T * U, thereby have solved wrong report and inefficacy that existing smoke alarm exists.
A kind of temperature detecting fire alarm device that adopts thermoelectric material to make of the present invention, this device includes heat-electric transducer, signal processing circuit and alarm; Heat-electric transducer converts voltage signal to for the variation with environment temperature and exports to signal processing circuit; Signal processing circuit is carried out the filtering comparison for the voltage signal that receives, and then drives alarm equipment alarm; Alarm is used for sending acoustic and light information, and prompting is reported to the police.
Heat-electric transducer by upper potsherd, lower potsherd and be arranged on upper potsherd and lower potsherd between many groups thermoelectricity to forming, described each group is thermoelectric to being made of the thermoelectric post of P type, the thermoelectric post of N-type, upper electrical conductors and lower electrical conductors, and the thermoelectric post of P type is connected the parallel placement of post and two ends and is connected with lower electrical conductors with upper electrical conductors respectively with N-type.The right number of required thermoelectricity is that the environment temperature of installing according to warning device is relevant with heat-electric transducer output voltage in heat-electric transducer, and the pass of its existence is C=0.53 Δ T * U.
The thermoelectric post selected materials of P type is the Bi of rich bismuth
2+XTe
3Material, wherein X=0.01～0.09.
The thermoelectric post selected materials of N-type is the Bi of rich tellurium
2Te
3+XMaterial, wherein X=0.01～0.09.
The present invention adopts the advantage of the temperature detecting fire alarm device that thermoelectric material makes:
1. this fire alarm installation adopts heat-electric transducer to supply with the required driving signal of alarm, and heat-electric transducer application Novel hot Electricity Functional material bismuth telluride processes, so that the environment for use of fire alarm installation is unrestricted.
2. this fire alarm installation as detection means, has solved wrong report and the inefficacy defective of existing smoke alarm with thermal signal (temperature difference that exists between upper potsherd and the lower potsherd).
3. this fire alarm installation is environment-friendly and energy-efficient, need not drive disk assembly, and volume is little, and Applicable temperature is wide, noiseless during work, pollution-free and make simple.
Description of drawings
Fig. 1 is the structured flowchart that the present invention adopts the temperature detecting fire alarm device that thermoelectric material makes.
Fig. 2 is signal processing circuit schematic diagram of the present invention.
Fig. 3 is the external structure of heat-electric transducer of the present invention.
Fig. 3 A is the cut-away view of heat-electric transducer of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Referring to shown in Figure 1, the temperature detecting fire alarm device that a kind of employing thermoelectric material of the present invention (bismuth telluride) is made, this device includes heat-electric transducer, signal processing circuit and alarm.
Heat-electric transducer converts voltage signal to for the variation with environment temperature and exports to signal processing circuit;
Signal processing circuit is carried out the filtering comparison for the voltage signal that receives, and then drives alarm equipment alarm, thereby realizes the warning of scene of fire.
Alarm is used for sending acoustic and light information, and prompting is reported to the police.
Referring to shown in Figure 2, negative link 2 ground connection of heat-electric transducer, positive link 1 is connected in parallel on capacitor C 1 and the capacitor C 2, then is connected on No. 3 pins of comparer U1, as a comparison the negative terminal of device; On the other hand, the power supply of+5V is realized the dividing potential drop of input supply voltage in turn through resistance R 1, resistance R 2 ground connection by the resistance of regulating resistance R1 and resistance R 2; The power supply of+5V is connected to through resistance R 1 on No. 2 pins of comparer U1, and the magnitude of voltage that No. 2 pins on the comparer U1 obtain is the partial pressure value of resistance R 2; No. 1 pin of comparer U1 is connected the negative pole end ground connection of alarm with the positive terminal of alarm; No. 4 pins of comparer U1 connect+the 5V power supply, No. 11 pin ground connection.In the present invention, the partial pressure value of resistance R 2 also is the threshold value of reporting to the police and exporting, and when heat-electric transducer output voltage is higher than then alarm equipment alarm of this threshold value, does not report to the police otherwise be lower than this threshold value.
In the present invention, comparer U1 selects the LM324 chip, and this LM324 chip is one and includes 4 independently high-gain, frequency compensated operational amplifiers, but both the order power supply used (3～30V), also can connect dual power supply use (± 1.5～± 15V), driving power consumption is low.
In the present invention, shunt capacitance C1 and capacitor C 2 on the positive link 1 of heat-electric transducer are conducive to high frequency clutter and low frequency clutter in filtering heat-electric transducer output voltage signal.
Referring to Fig. 3, shown in Fig. 3 A, heat-electric transducer is by upper potsherd 3, lower potsherd 4 and be arranged on potsherd 3 and lower potsherd 4 between many groups thermoelectricity form 5, described each group thermoelectric to 5 by the thermoelectric post 51 of P type, the thermoelectric post 52 of N-type, upper electrical conductors 53 and lower electrical conductors 54 consist of, the thermoelectric post 51 of P type is connected post 52 parallel placements and two ends and is connected with lower electrical conductors 54 with upper electrical conductors 53 respectively with N-type, upper electrical conductors 53 is connected to the below of potsherd 3, lower electrical conductors 54 is connected to the top of lower potsherd 4, upper potsherd 3 and lower potsherd 4 parallel placements.
Thermoelectric post 52 selected materials of N-type are the Bi of rich tellurium
2Te
3+XMaterial, wherein X=0.01～0.09.
Upper electrical conductors 53 and lower electrical conductors 54 are selected copper sheet, as the voltage signal transmission.
In the present invention, required thermoelectricity is that the environment temperature of installing according to warning device is relevant with heat-electric transducer output voltage to 5 number in heat-electric transducer, the pass of its existence is C=0.53 Δ T * U, C represents thermoelectric to 5 number, Δ T represents the temperature difference between potsherd 3 and the lower potsherd 4, and U represents heat-electric transducer output voltage.During a general heat-electric transducer output 4V voltage, when the temperature between upper potsherd 3 and the lower potsherd 4 was 60 ℃, then required thermoelectricity was 120～150 to 5 number.
The heat of the present invention's design-electric transducer adopts the thermoelectric right structure of series connection, be equivalent to a small power supply because each group is thermoelectric to 5, according to power supply series connection rule in the circuit, output voltage is the stack of each small power supply voltage as can be known, and output voltage just can improve greatly like this.
In the present invention, the bismuth telluride thermoelectric material that heat-electric transducer adopts is to utilize thermoelectric effect, by the material internal carrier moving heat energy and electric energy is intercoupled, mutually changes.Thermoelectric effect refers to the electrical effect general name that the reversible thermal effect that caused by electric current and the temperature difference cause, it comprises three effects that are mutually related: Seebeck effect, Peltier effect and Thomson effect.When there is the temperature difference in different materials two tip nodes, have electromotive force in the loop and exist, this phenomenon is called Seebeck effect or thermoelectric effect, and the electromotive force that produces is called thermoelectromotive force, is also referred to as the Seebeck electromotive force.The Seebeck effect can thermo-electric generation, the hole concentration at high temperature place is than the height at low temperature place, the concentration heat movement speed that has formed the hole also is higher than the low temperature place, spread to the low temperature place in the hole as a result, the semiconductor internal electric field stops the hole to continue to spread to low-temperature end, can tilt by band, the thermoelectromotive force of the difference of two ends Fermi level has appearred equaling, thermoelectromotive force direction to metal electrode is just in time opposite, and the present invention becomes the thermoelectric output power that can improve heat-electric transducer to, a plurality of thermoelectricity to forming thermoelectric pile with the thermoelectric post of P type, the thermoelectric column combination of N-type.
The Bi of step 1, the thermoelectric post 51 rich bismuths of P type processed
2+0.06Te
3Material
(1) with the Te 0.1914g, the BiCl that take by weighing
30.3250g being added to liner with EDTA_2Na 0.7445g is that teflon, volume are in the reactor of 45ml;
(2) then add 25ml DMF (DMF), 10ml absolute ethyl alcohol, and under magnetic stirring apparatus, stir after 2 hours, add again KOH 2.24g, used again magnetic stirrer 1 hour;
(3) reactor is put into chamber type electric resistance furnace and react, kept 24 hours at 140 ℃;
(4) after reaction finishes, respectively with behind deionized water washing, the absolute ethanol washing, behind the centrifugal suction filtration product, and with product baking temperature be 80 ℃ lower dry 60 minutes, obtain the grey black powder.
(5) be to be pressed into block sample under the 10MPa with the grey black powder at pressure;
(6) then block sample is placed the porcelain Noah's ark of atmosphere furnace, pass into nitrogen and get rid of furnace air, suction is to 1Pa, and under nitrogen atmosphere being warming up to 550 ℃ under the 7 ℃/min of heating rate, and behind insulation 5h under this temperature, make the Bi of rich bismuth
2+0.06Te
3Material.
(7) cut according to the right size of thermoelectricity.
The thermoelectric post 51 of P type is of a size of 2mm * 2mm * 4mm.
The Bi of step 2, the thermoelectric post 52 rich telluriums of N-type processed
2Te
3+0.03Material
(1) with the Te 0.1933g, the BiCl that take by weighing
30.3250g being added to liner with EDTA_2Na 0.7445g is that teflon, volume are in the reactor of 45ml;
(2) then add 25ml DMF (DMF), 10ml absolute ethyl alcohol, and under magnetic stirring apparatus, stir after 2 hours, add again KOH 2.24g, used again magnetic stirrer 1 hour;
(3) reactor is put into chamber type electric resistance furnace and react, kept 24 hours at 140 ℃;
(4) after reaction finishes, respectively with behind deionized water washing, the absolute ethanol washing, behind the centrifugal suction filtration product, and with product baking temperature be 80 ℃ lower dry 60 minutes, obtain the grey black powder.
(5) be to be pressed into block sample under the 10MPa with the grey black powder at pressure;
(6) then block sample is placed the porcelain Noah's ark of atmosphere furnace, pass into nitrogen and get rid of furnace air, suction is to 1Pa, and under nitrogen atmosphere being warming up to 550 ℃ under the 7 ℃/min of heating rate, and behind insulation 5h under this temperature, make the Bi of rich tellurium
2Te
3+0.03Material.
(7) cut according to the right size of thermoelectricity.
The thermoelectric post 52 of N-type is of a size of 2mm * 2mm * 4mm.
(1) the upper electrical conductors 53 of step 4 is bonded in the below of upper potsherd 3;
Lower electrical conductors 54 is bonded in the top of lower potsherd 4;
(2) it is a plurality of to be bonded with the thermoelectric post of P type and the thermoelectric post of N-type that step 1 and step 2 make between upper electrical conductors 53 and lower electrical conductors 54, and the thermoelectric post of described P type and the thermoelectric post of N-type are to arrange according to cascaded structure shown in Figure 3;
(3) in order to test prepared heat-electric transducer performance, deviser's A thermopair that above upper potsherd, bonds, bonding B thermopair below lower potsherd 4, the output terminal of two thermopairs is plugged on the digit thermometer; The positive and negative end of multimeter is connected on the positive and negative link of heat-electric transducer (being adjusted on the shelves of direct voltage); Lighted candle below lower potsherd 4; At this moment, digit thermometer can record upper and lower potsherd temperature separately by A, B thermopair; Multimeter can record the output voltage of heat-electric transducer, by the information of voltage that shows on the multimeter, illustrates that the output voltage of this kind heat-electric transducer can satisfy the required working power of comparer.
The warning device of the present invention design in use, the one side of thermoelectric pickup is used for experiencing the hot-fluid that high temperature heat source transmits, another side is done radiating treatment by devices such as heat radiator, can more improve like this sensing function of sensor.Hot-fluid transmits, and upper and lower surface produces certain temperature difference, and according to Seebeck effect, the two ends of wire can produce certain voltage signal, the signal source of Here it is warning device of the present invention.This signal is carried out filtering, and afterwards by a comparer, in case signal source is higher than threshold voltage (regulating R1, R2 can get), integrated transporting discharging is just exported a high level, drives alarm equipment alarm.This threshold voltage can be regulated according to applied environment, is widely used in a lot of environment, and has reduced rate of false alarm.
Claims (1)
1. temperature detecting fire alarm device that adopts thermoelectric material to make, this device includes heat-electric transducer, signal processing circuit and alarm;
Described heat-electric transducer converts voltage signal to for the variation with environment temperature and exports to signal processing circuit;
Described signal processing circuit is carried out the filtering comparison for the voltage signal that receives, and then drives alarm equipment alarm;
Described alarm is used for sending acoustic and light information, and prompting is reported to the police; It is characterized in that:
Described heat-electric transducer by upper potsherd (3), lower potsherd (4) and be arranged on upper potsherd (3) and lower potsherd (4) between many groups thermoelectricity (5) are formed, described each group is thermoelectric to be made of the thermoelectric post (51) of P type, the thermoelectric post (52) of N-type, upper electrical conductors (53) and lower electrical conductors (54) (5), and P type thermoelectricity post (51) is connected the parallel placement of post (52) and two ends and is connected with lower electrical conductors (54) with upper electrical conductors (53) respectively with N-type; Thermoelectric post (51) selected materials of described P type is the Bi of rich bismuth
2+XTe
3Material, wherein X=0.01～0.09; Thermoelectric post (52) selected materials of described N-type is the Bi of rich tellurium
2Te
3+XMaterial, wherein X=0.01～0.09;
Required thermoelectricity is to determine according to the relation between environment temperature and the heat-electric transducer output voltage to the number of (5) in the described heat-electric transducer, be C=0.53 Δ T * U, C represents thermoelectric number to (5), Δ T represents the temperature difference between potsherd (3) and the lower potsherd (4), and U represents heat-electric transducer output voltage;
Negative link 2 ground connection of heat-electric transducer, positive link 1 is connected with an end of capacitor C 1, the other end ground connection of capacitor C 1, positive link 1 is connected with an end of capacitor C 2, the other end ground connection of capacitor C 2, positive link 1 is connected on No. 3 pins of comparer U1 of LM324 chip model, as a comparison the anode of device; On the other hand, the input supply voltage of+5V is in turn through resistance R 1, resistance R 2 ground connection, and the resistance by regulating resistance R1 and resistance R 2 realizes the dividing potential drop to the input supply voltage of described+5V; The power supply of+5V is connected to through resistance R 1 on No. 2 pins of comparer U1, and the magnitude of voltage that No. 2 pins on the comparer U1 obtain is the partial pressure value of resistance R 2; No. 1 pin of comparer U 1 is connected the negative pole end ground connection of alarm with the positive terminal of alarm; No. 4 pins of comparer U1 connect+the 5V power supply, No. 11 pin ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010033610.3A CN101770678B (en) | 2010-01-05 | 2010-01-05 | Temperature detecting fire alarm device made of thermoelectric materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010033610.3A CN101770678B (en) | 2010-01-05 | 2010-01-05 | Temperature detecting fire alarm device made of thermoelectric materials |
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| CN101770678A CN101770678A (en) | 2010-07-07 |
| CN101770678B true CN101770678B (en) | 2013-03-13 |
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| CN201010033610.3A Expired - Fee Related CN101770678B (en) | 2010-01-05 | 2010-01-05 | Temperature detecting fire alarm device made of thermoelectric materials |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102456146A (en) * | 2010-11-02 | 2012-05-16 | 上海中映信息科技有限公司 | Method for guaranteeing uniqueness of digital certificate based on RFID (radio frequency identification device) technology |
| CN102494795B (en) * | 2011-12-19 | 2013-08-14 | 北京航空航天大学 | Passive temperature sensor and test system based on same |
| CN104966374B (en) * | 2015-07-08 | 2018-05-18 | 北京态金科技有限公司 | A kind of low-melting-point metal thermoelectricity fire alarm installation |
| JP6680547B2 (en) * | 2016-01-29 | 2020-04-15 | 日本ドライケミカル株式会社 | Thermocouple type distributed sensor and disaster prevention system |
| CN108305430B (en) * | 2018-02-13 | 2020-12-18 | 清华大学 | Fire early warning system |
| CN112432719B (en) * | 2020-11-06 | 2022-04-15 | 中国空气动力研究与发展中心超高速空气动力研究所 | Thermopile heat flow sensor |
| CN112614296A (en) * | 2020-12-18 | 2021-04-06 | 清华大学 | Tunnel fire detection device and alarm system based on thermoelectric cement-based composite material |
| CN112729574A (en) * | 2021-01-08 | 2021-04-30 | 国网山东省电力公司龙口市供电公司 | Conductor heating automatic monitoring device |
| CN112767630A (en) * | 2021-01-14 | 2021-05-07 | 深圳第三代半导体研究院 | Self-powered fireproof early warning temperature sensing circuit |
| CN114220366B (en) * | 2021-11-09 | 2023-09-01 | 中国民用航空飞行学院 | Guiding device convenient to adjust for civil aviation emergency rescue |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426625Y (en) * | 2000-06-23 | 2001-04-11 | 刘兴仁 | Fire danger temp. monitoring alarm device |
| CN101080824A (en) * | 2004-12-20 | 2007-11-28 | 株式会社东芝 | Thermoelectric conversion module, heat exchanger using same, and thermoelectric power generating system |
-
2010
- 2010-01-05 CN CN201010033610.3A patent/CN101770678B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426625Y (en) * | 2000-06-23 | 2001-04-11 | 刘兴仁 | Fire danger temp. monitoring alarm device |
| CN101080824A (en) * | 2004-12-20 | 2007-11-28 | 株式会社东芝 | Thermoelectric conversion module, heat exchanger using same, and thermoelectric power generating system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平5-63243A 1993.03.12 |
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