CN2814557Y - Semiconductor thermoelectric effect teaching demonstration instrument - Google Patents
Semiconductor thermoelectric effect teaching demonstration instrument Download PDFInfo
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- CN2814557Y CN2814557Y CN 200520026202 CN200520026202U CN2814557Y CN 2814557 Y CN2814557 Y CN 2814557Y CN 200520026202 CN200520026202 CN 200520026202 CN 200520026202 U CN200520026202 U CN 200520026202U CN 2814557 Y CN2814557 Y CN 2814557Y
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- chilling plate
- semiconductor chilling
- heating radiator
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- demonstration instrument
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Abstract
The utility model relates to a kind of semiconductor heat electrical effect demonstration instrument for teaching.Mainly form by high and low temperature display module, amp gauge, voltage meter, semiconductor chilling plate, heating radiator, thin resistive heater, Switching Power Supply etc.Semiconductor chilling plate, aluminium cup fasten as one by long spiro nail with heating radiator with insulation material insulation back and are fixed in the housing, thin resistive heater and heat-insulating block fasten as one by short screw and heating radiator, and the position that contacts with semiconductor chilling plate at the top of the bottom of aluminium cup and heating radiator is equipped with thermopair.Adopt the modular converter of semiconductor chilling plate, can demonstrate paltie effect and Seebeck effect, when the demonstration paltie effect, can show the temperature value of voltage, current value and the cold and hot end at semiconductor chilling plate two ends as thermoelectric effect.Can clearly illustrate the height of the size and the temperature of thermoelectromotive force, electric current at the demonstration Seebeck effect.On this basis, can also demonstrate ultimate principle and rules such as hot machine, refrigeration machine, the first law of thermodynamics and second law simultaneously.
Description
Technical field
The utility model relates to the instruments used for education of a kind of physics calorifics aspect, specifically is meant semiconductor heat electrical effect demonstration instrument for teaching.
Background technology
Thermoelectric effect is meant the general name that the thermal effect that caused by electric current and the temperature difference cause electrical effect, generally comprises paltie effect (Peltier) and Sai Beike (Seebeck) effect.When electric current passes through the node of two kinds of different conductors, near node, will produce temperature variation, a node turns cold, and another node heating is paltie effect; Two node temperature will produce thermoelectromotive force in the loop not simultaneously in the closed-loop path that two kinds of different conductors constitute, and is Seebeck effect.At present, in physics and thermal technology's teaching, thermoelectric effect does not have special instrument to demonstrate these experiments intuitively.For paltie effect, generally be to pass to direct current to semiconductor chilling plate, know the temperature difference in semiconductor chilling plate cold junction and hot junction with feel,, can not determine the size of semiconductor chilling plate both end voltage, electric current and the height of cold and hot end temperature although this method is simple and convenient; For Seebeck effect, generally be to demonstrate with the simple mechanism that the metallic thermocouple of several nodes constitutes, the thermoelectromotive force that this method produces is too little, only is the millivolt level, DeGrain.
Summary of the invention
The purpose of this utility model provides a kind of semiconductor heat electrical effect demonstration instrument for teaching device, this instrument can be demonstrated paltie effect and Seebeck effect, when the demonstration paltie effect, can show the voltage and current size at semiconductor chilling plate two ends and the height of cold and hot end temperature, can clearly illustrate the height of the size and the temperature of thermoelectromotive force and electric current at the demonstration Seebeck effect, on this basis, can also demonstrate thermodynamics ultimate principle and rules such as hot machine, refrigeration machine, the first law of thermodynamics and second law.
Fig. 1 is an external structure synoptic diagram of the present utility model.Lamp socket 10 and bulb 11 are positioned at the left upper end at rectangle housing 2 tops, and lamp socket 10 can be positioned over the position that is suitable for observing, and also detachably place.Cover plate 1 is positioned at the right-hand member at housing 2 tops, front portion at housing 2, left upper end is a voltage meter 9, the lower-left end is an amp gauge 8, upper right side is a low temperature display module 3, be high temperature display module 5 below it, bottom righthand side is Seebeck effect switch 6 and paltie effect switch 7, at housing 2 right flanks air inlet 4 is arranged.Fig. 2 is a structural profile synoptic diagram of the present utility model.Semiconductor chilling plate 15, taper aluminium cup 12 usefulness insulation materials 13 insulation backs fasten as one by long spiro nail 17 with heating radiator 16 and are fixed in the housing 2.Thin resistive heater 19 and heat-insulating block 20 fasten as one by short screw 18 and heating radiator.Bottom at aluminium cup 12 is equipped with thermopair 14 with the position that heating radiator 16 tops contact with semiconductor chilling plate 15.Semiconductor chilling plate 15 can be selected the semiconductor chilling plate of any TEC1 model more than maximum temperature difference electric current 3.0A, operating voltage 12V, the refrigeration work consumption 20W.The specification of bulb 11 is 3.8V, 0.02～0.3A.Switching Power Supply 23 is fixed in the left surface of shell 2, a fan 22 is installed below it, and there are air inlet 4 and air outlet 21 in the side of shell.Switching Power Supply 23 is converted to alternating current in the direct current of 12V, 1～3A.
Description of drawings
Fig. 1 is an external structure synoptic diagram of the present utility model.
Fig. 2 is a structural profile synoptic diagram of the present utility model.
Fig. 3 is circuit theory diagrams of the present utility model.
In the drawings: the 1-cover plate; The 2-housing; 3-low temperature display module; The 4-air inlet; 5-high temperature display module; 6-Seebeck effect switch; 7-paltie effect switch; The 8-amp gauge; The 9-voltage meter; The 10-lamp socket; The 11-bulb; 12-aluminium cup; The 13-insulation material; The 14-thermopair; The 15-semiconductor chilling plate; The 16-heating radiator; The 17-long spiro nail; The 18-short screw; The 19-thin resistive heater; The 20-heat-insulating block; The 21-air outlet; The 22-fan; The 23-Switching Power Supply.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As accompanying drawing 2, shown in Figure 3, inject tap water at first for taper aluminium cup 12, cover cover plate 1.Insert civil power, be converted to the direct current of 12V, 1～3A through Switching Power Supply 22.
The demonstration Seebeck effect: close paltie effect switch 7, connect Seebeck effect switch 6, thin resistive heater 18 begins heating, heat is passed to the hot junction of semiconductor chilling plate 15 by conductive force through heating radiator 16.Aluminium cup 12 keeps lower temperature owing to inside fills tap water, makes the cold junction of semiconductor chilling plate 15 also keep lower temperature by conductive force.All scribble one deck conduction estersil between the upper and lower end face of semiconductor chilling plate 15 and heating radiator 16 and the thin resistive heater 18, make the head temperature of heating radiator 16, the bottom temp of aluminium cup 12 equates substantially with the hot junction and the cold junction temperature of semiconductor chilling plate 15 respectively, therefore, the temperature of semiconductor chilling plate 15 cold and hot ends can show through low temperature display module 3 and high temperature display module 5 by thermopair 14, can dynamically show the temperature of semiconductor chilling plate 15 cold and hot ends this moment at any time, and then calculate the numerical value of the concrete temperature difference, also can avoid the heating-up temperature in hot junction too high simultaneously.Along with the foundation gradually of the semiconductor chilling plate 15 cold and hot end temperature difference, bulb 11 is also light gradually, and the magnitude of voltage at bulb 11 two ends is read by voltage meter 9, and the current value that flows through is read by amp gauge 8.Adjusting gauge tap 6 makes the hot-side temperature of semiconductor chilling plate 15 be no more than 100 ℃, tap water in the aluminium cup 12 can be changed at any time, make the cold junction of semiconductor chilling plate 15 keep relatively low temperature, keep certain temperature difference this moment, brightness by bulb 11 changes, and can clearly demonstrate the Seebeck effect of semiconductor chilling plate 15.Fan 22 is opened in Seebeck effect demonstration finishing back, can finish this experimentation when the temperature of high temperature display module 5 is reduced to below 50 ℃.
The demonstration paltie effect: unload lamp socket 10 and bulb 11, close Seebeck effect switch 6, connect paltie effect switch 7, Switching Power Supply 22 is given semiconductor chilling plate 15 input dc powers, and the cold junction of semiconductor chilling plate 15 begins refrigeration, and the hot junction begins heat release.Put into the cold that an amount of tap water absorbs semiconductor chilling plate 15 cold junctions in the taper aluminium cup 12; Start fan 22 simultaneously, the heat in semiconductor chilling plate 15 hot junctions is discharged by heating radiator 16.The magnitude of voltage at semiconductor chilling plate 15 two ends is read by voltage table 9, the current value that passes through is read by amp gauge 8, the cold and hot end temperature of semiconductor chilling plate 15 shows through low temperature display module 3 and high temperature display module 5 by thermopair 14, calculates concrete temperature approach thus.Adjust gauge tap 7 and make the hot-side temperature of semiconductor chilling plate 15 be no more than 100 ℃, refrigeration was better when the tap water in the aluminium cup 12 kept a small amount of, and this moment, the paltie effect of semiconductor chilling plate 15 was clearly demonstrated out.Fan 22 should be opened after the paltie effect demonstration finishes always, when the temperature of high temperature display module 5 is reduced to below 50 ℃, this experimentation can be finished.
In the demonstration Seebeck effect, also demonstrating the ultimate principle of hot machine, promptly semiconductor chilling plate 15 absorbs heat from high temperature heat source (thin resistive heater 18), and externally acting (bulb 11 is shinny, electric work) is simultaneously to low-temperature heat source (aluminium cup 12) heat release.The height of efficiency of heat engine, the size that depends on external acting and what the ratio that absorbs heat.
In the demonstration Seebeck effect, also demonstrating the ultimate principle of the first law of thermodynamics, be semiconductor chilling plate 15 externally do work (bulb 11 is shinny, electric work) how much equal heat that semiconductor chilling plate 15 two ends absorb from high temperature heat source (thin resistive heater 18) and difference to low-temperature heat source (aluminium cup 12) liberated heat.When the temperature at semiconductor chilling plate 15 two ends was identical, when promptly the temperature difference was zero, semiconductor chilling plate 15 became single source, amp gauge 8 and voltage meter 9 readings are zero, bulb 11 does not work, and illustrating does not have electric work to produce, and promptly satisfies Kelvin's saying of the second law of thermodynamics.
In the demonstration paltie effect, also demonstrated the ultimate principle of refrigeration machine, be semiconductor chilling plate 15 to low-temperature heat source (aluminium cup 12) output cold, simultaneously must consumed work (Switching Power Supply 22 provides electric work), and to high temperature heat source (heating radiator 16) discharge heat.
The utility model advantage and beneficial effect are to adopt semiconductor chilling plate as the modular converter of pyroelectric effect, structure Simply, easy to operate, Seebeck effect and paltie effect can be demonstrated well, and hot machine, system can be demonstrated Thermodynamics basic principle and the rules such as cold machine, the first law of thermodynamics and second law.
Claims (6)
1. semiconductor heat electrical effect demonstration instrument for teaching, by cover plate (1), housing (2), low temperature display module (3), high temperature display module (5), amp gauge (8), voltage meter (9), lamp socket (10), bulb (11), switch (6,7), semiconductor chilling plate (15), aluminium cup (12), heating radiator (16), thermopair (14), thin resistive heater (19), fan (22), Switching Power Supply (23) is formed, it is characterized in that lamp socket (10) and bulb (11) place the top of housing (2), semiconductor chilling plate (15), aluminium cup (12) fastens as one by long spiro nail (17) with heating radiator (16) with insulation material (13) insulation back and is fixed in the housing (2), thin resistive heater (19) and heat-insulating block (20) fasten as one by short screw (18) and heating radiator, and the position that contacts with semiconductor chilling plate (15) at the top of the bottom of aluminium cup (12) and heating radiator (16) is equipped with thermopair (14).
2. according to the described semiconductor thermoelectric effect demonstration instrument of claim 1, it is characterized in that described Switching Power Supply (23) is converted to alternating current in the direct current of 12V, 1～3A.
3. according to the described semiconductor thermoelectric effect demonstration instrument of claim 1, it is characterized in that described semiconductor chilling plate (15) can select the semiconductor chilling plate of the above any TEC1 model of maximum temperature difference electric current 3.0A, operating voltage 12V, refrigeration work consumption 20W.
4. according to the described semiconductor thermoelectric effect demonstration instrument of claim 1, the specification that it is characterized in that described bulb (11) is 3.8V, 0.02～0.3A.
5. according to the described semiconductor thermoelectric effect demonstration instrument of claim 1, it is characterized in that described lamp socket (10) is placed on the top of housing (2), also can be placed on other position, also detachably place.
6. according to the described semiconductor thermoelectric effect demonstration instrument of claim 1, it is characterized in that a Draw off valve is arranged at the bottom of described aluminium cup (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520026202 CN2814557Y (en) | 2005-06-20 | 2005-06-20 | Semiconductor thermoelectric effect teaching demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520026202 CN2814557Y (en) | 2005-06-20 | 2005-06-20 | Semiconductor thermoelectric effect teaching demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2814557Y true CN2814557Y (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520026202 Expired - Fee Related CN2814557Y (en) | 2005-06-20 | 2005-06-20 | Semiconductor thermoelectric effect teaching demonstration instrument |
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| Country | Link |
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| CN (1) | CN2814557Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196947A (en) * | 2013-04-01 | 2013-07-10 | 上海理工大学 | Thermoelectric performance measuring device and measuring method of thermoelectric refrigeration chip |
| CN103927925A (en) * | 2014-04-28 | 2014-07-16 | 蚌埠市创新科普产品工程研究中心有限公司 | Semi-conductor refrigerating demonstrator |
| CN108281073A (en) * | 2018-03-26 | 2018-07-13 | 河南师范大学 | A kind of physics teaching thermoelectric electromagnet demonstrator |
| CN111696413A (en) * | 2019-03-14 | 2020-09-22 | 浙江赛美克电子科技有限公司 | Peltier physical effect and Seebeck physical effect demonstration teaching aid |
-
2005
- 2005-06-20 CN CN 200520026202 patent/CN2814557Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196947A (en) * | 2013-04-01 | 2013-07-10 | 上海理工大学 | Thermoelectric performance measuring device and measuring method of thermoelectric refrigeration chip |
| CN103927925A (en) * | 2014-04-28 | 2014-07-16 | 蚌埠市创新科普产品工程研究中心有限公司 | Semi-conductor refrigerating demonstrator |
| CN108281073A (en) * | 2018-03-26 | 2018-07-13 | 河南师范大学 | A kind of physics teaching thermoelectric electromagnet demonstrator |
| CN111696413A (en) * | 2019-03-14 | 2020-09-22 | 浙江赛美克电子科技有限公司 | Peltier physical effect and Seebeck physical effect demonstration teaching aid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |