CN201348836Y - Contrast experiment apparatus for heat convection and heat conduction - Google Patents
Contrast experiment apparatus for heat convection and heat conduction Download PDFInfo
- Publication number
- CN201348836Y CN201348836Y CNU2008201572385U CN200820157238U CN201348836Y CN 201348836 Y CN201348836 Y CN 201348836Y CN U2008201572385 U CNU2008201572385 U CN U2008201572385U CN 200820157238 U CN200820157238 U CN 200820157238U CN 201348836 Y CN201348836 Y CN 201348836Y
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- glass tube
- end glass
- contrast experiment
- thermal convection
- heat conducting
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Abstract
The utility model relates to a contrast experiment apparatus for heat convection and heat conduction, which consists of a glass tube, thermometers, rubber plugs, a small round hole, a syringe and an alcohol burner; wherein the glass tube is bent into three sections, that is, a high-end glass tube, a middle-end glass tube and a low-end glass tube; the high-end glass tube is vertically connected with one end of the middle-end glass tube; the other end of the middle-end glass tube is connected with the low-end glass tube; the thermometers are respectively connected with the high-end glass tube and the low-end glass tube through the rubber plugs; the small round hole is arranged at the juncture between the middle-end glass tube and the low-end glass tube; the syringe is connected with the glass tube through the small round hole; and the alcohol burner is arranged under the middle-end glass tube. The utility model has the advantages that the experiment operation is easy, experiment failure caused by misoperations conducted by students can be reduced, and therefore the experiment is more scientific and authentic.
Description
Technical field
The utility model relates to a kind of experiment device for teaching, is specifically related to a kind of thermal convection and heat conducting contrast experiment's device.
Background technology
The thermal conductivity of empty G﹠W is the content of six grades Oxford Shanghai Edition " science " study, for the knowledge that six grades student can be obtained to be correlated with, must finish water and air in thermal convection and heat conducting comparative experiments by teacher's demonstration or probing into of student.Original experiment: be in vitro to add with a kind of fluid (air or water) at two, respectively thermometer is inserted in the fluid of the bottom of these two test tubes and upper end, insert the test tube bottom of thermometer heats with spirit lamp in the upper end, because convection of heat has taken place fluid, the temperature variation of observing the upper end thermometer is bigger; Again the test tube upper end of bottom insertion thermometer is heated with spirit lamp, be that the energy of thermal motion will transmit gradually towards periphery layer by layer, and heat conduction has taken place owing to exist interaction between the molecule of fluid, just because of empty G﹠W thermal conductivity is poor, observed temperature variation is very little.Experiment effect exists some problems;
1, with same spirit lamp flame respectively in test tube bottom and the heating of test tube upper end, if finish the thermal convection and the heat conduction comparative experiments of gas and liquid, the time that 4 experiments are changed is long.The student is when comparative experiments simultaneously, because the position difference of test tube heating, the amount of the getting difference of liquid, thermometer inserts the degree of depth difference of fluid in vitro, the asynchronism(-nization) of heating, occur the upper end heating sometimes and the temperature of bottom temp meter also raises than very fast phenomenon, directly influence the student and obtain the poor conductor experiment conclusion that empty G﹠W all is a heat.
If 2 compare in test tube bottom and the heating simultaneously of test tube upper end with two spirit lamps, because spirit lamp flame difference, the temperature difference of heating, exist the student too in experimentation, the position difference of test tube heating, the amount of the getting difference of liquid, thermometer are inserted the degree of depth difference of fluid in vitro, can have influence on the experiment conclusion that some classmate obtains too.
The utility model content
The purpose of this utility model makes experiment more convenient in order to solve the problem that comparative experiments should not occur, and experimental period is shorter, and experiment effect is better.
In order to achieve the above object, the technical solution of the utility model is: a kind of thermal convection and heat conducting contrast experiment's device, comprise glass tube, thermometer, rubber stopper, the roundlet hole, needle tubing, spirit lamp, described glass tube is bent into high-end glass tube, three sections of middle-end glass tube and low side glass tubes, the vertical connection with an end of middle-end glass tube of high-end glass tube communicates, the other end of middle-end glass tube is connected with the low side glass tube and communicates, thermometer is connected with the low side glass tube with high-end glass tube respectively by rubber stopper, be provided with a roundlet hole at middle-end glass tube and low side glass tube intersection, needle tubing is connected with glass tube by the roundlet hole, and spirit lamp places the below of middle-end glass tube.
Above-mentioned thermal convection and heat conducting contrast experiment's device, wherein, the length of described glass tube is 80 centimetres, internal diameter is 1.8 centimetres.
Above-mentioned thermal convection and heat conducting contrast experiment's device, wherein, described high-end glass tube is connected with the middle-end glass tube and is " L " type, and described low side glass tube is " U " type, and the mouth of pipe is upwards.
Above-mentioned thermal convection and heat conducting contrast experiment's device, wherein, the diameter in described roundlet hole is 0.5 centimetre.
Above-mentioned thermal convection and heat conducting contrast experiment's device, wherein, the opening part of described high-end glass tube is provided with a groove.
Above-mentioned thermal convection and heat conducting contrast experiment's device, wherein, the length of described high-end glass tube is 30 centimetres, the height of low side glass tube is 18 centimetres.
Above-mentioned thermal convection and heat conducting contrast experiment's device, wherein, described spirit lamp hot spot keeps identical with the distance of two sides temperature meter glass envelope measurement point.
The utility model has the advantages that experimental implementation is easy, the student can save the process of the time participation Inquiry Learning activity of many experiments, not only can be used for student's the experiment of probing into, and can be used for teacher's lecture experiment.According to the device of control variate method design and experimentize, can reduce the failure of an experiment that causes owing to student's misoperation, have more science, credibility.
Description of drawings
Fig. 1 is the structural representation of the utility model thermal convection and heat conducting contrast experiment's device.
Embodiment
Below further specify a kind of better embodiment of the present utility model with reference to the accompanying drawings:
Referring to Fig. 1, glass tube 10 with 1.8 centimetres of long 80 centimetres, internal diameters, be processed into the curved shape structure, be bent into 5 three sections of high-end glass tube 3, middle-end glass tube 4 and low side glass tubes, high-end 3 vertical connections with an end of middle-end glass tube 4 of glass tube communicate, the other end of middle-end glass tube 4 is connected with low side glass tube 5 and communicates, and high-end glass tube 3 is connected with middle-end glass tube 4 and is " L " type, and low side glass tube 5 is " U " type.High-end glass tube 3 (to insert the high a section of the thermometer glass mouth of pipe) is measured convection of heat, and conduction and middle-end glass tube 4 that low side glass tube 5 (to insert the low a section of the thermometer glass mouth of pipe) is measured heat fuse.30 centimetres of high-end glass 3 pipe ranges are opened a groove that communicates with outside air at high-end glass 3 mouths of pipe, the danger that takes place in case when heating volumetric expansion of fluid stopping body produces hypertonia.Low side glass tube 5 is that downward 18 centimeters at horizontal middle-end glass tube 4 other ends curve the U-shaped pipe, and the mouth of pipe upwards.High-end glass tube 3 mouths of pipe and the low side glass 5 pipe mouths of pipe insert the thermometer 1 of band rubber stopper 2 respectively, make between low side glass tube 5 mouths of pipe and the rubber stopper 2 air tightly, and groove makes in the glass tube and communicates with the external world between high-end glass tube 3 mouths of pipe and the rubber stopper 2.And the heating position of adjusting middle-end glass tube 4 keeps identical with the distance of two sides temperature meter glass envelope measurement point, opened one 0.5 centimetre small sircle hole 6 at the low side glass tube 5 and the intersection of middle-end glass tube, can red water have been injected in the middle-end glass tube 4 with the needle tubing 7 of band rubber stopper.
This experimental provision, amount, measuring point that has taken into full account flame temperature, heat time heating time, heating position, fluid etc. may influence many factors of experiment, adopted the method for control variable to design and produce and formed.With the flame heat of same spirit lamp, in glass tube same position heating, the position of heating is identical far from the distance of the thermometer measure point on both sides, the time of heating is identical, just can directly obtain the objective experiment conclusion of comparison by the situation of change of Direct observation two sides temperature meter.
Use thermal convection and heat conduction contrast experiment device, can carry out the thermal convection and the heat conduction comparative experiments of gas, also can carry out liquid heat convection current and heat conduction comparative experiments.If when carrying out air thermal convection and heat conduction comparative experiments, two glass mouths of pipe are separately beyond the Great Wall with the thermometer of rubber stopper in can on-line equipment, be fixed on the iron stand, heat with spirit lamp at the place at the middle-end glass tube, just can compare by observing temperature variation.If when carrying out the thermal convection of water and heat conduction comparative experiments, to in glass tube, add people's water earlier, the method that adds water is to begin from the high-end glass mouth of pipe earlier, when treating that water level is equal with the low side glass mouth of pipe, the thermometer of the band rubber stopper of end portion continues to add water to from the high-end glass mouth of pipe 5 centimeters, the thermometer of the band rubber stopper at high-end position beyond the Great Wall beyond the Great Wall, be fixed on the iron stand and heat, compare.Finish these two experiments relatively, relatively can save 60% experimental period with original experiment.
When the thermal convection of carrying out water and heat conduction contrast experiment device, can inject red water at the middle-end glass tube with the rubber stopper of needle tubing by small sircle hole, when heating, can observe simultaneously the situation that red water flows in glass tube, the liter waterborne of redness is very fast during thermal convection, during heat conduction simultaneously fewer red water diffusion phenomena are arranged also, can intuitively understand hydro-thermal by experiment and transmit situation.(syringe needle that passes rubber stopper needn't be extracted at ordinary times, adds colored water as long as take out syringe.Do the comparative experiments of gas, the colored water needle tubing inserts can not influence experiment.)
The advantage of thermal convection current and heat conduction contrast experiment device maximum is that experimental provision is simple, and experimental implementation is held Easily, the student can save the process of the time participation Inquiry Learning activity of many experiments, not only can be used for The student probes into experiment, and can be used for teacher's lecture experiment. Dress according to the control variate method design Put and test, can reduce the failure of an experiment that causes owing to student's operate miss, have more section The property learned, credibility. This device is Self-made Realia and the learning aid of developing by six grades the content of courses, If be used for the teaching of the relevant heat transfer of junior middle school or senior middle school, all existing than original experimental provision experiment Resemble more obviously, teaching efficiency is better.
Claims (7)
1. a thermal convection and heat conducting contrast experiment's device, it is characterized in that, comprise glass tube (10), thermometer (1), rubber stopper (2), roundlet hole (6), needle tubing (7), spirit lamp (8), described glass tube (10) is bent into high-end glass tube (3), (5) three sections of middle-end glass tube (4) and low side glass tubes, the vertical connection with an end of middle-end glass tube (4) of high-end glass tube (3) communicates, the other end of middle-end glass tube (4) is connected with low side glass tube (5) and communicates, thermometer (1) is connected with low side glass tube (5) with high-end glass tube (3) respectively by rubber stopper (2), be provided with a roundlet hole (6) at middle-end glass tube (4) and low side glass tube (5) intersection, needle tubing (7) is connected with glass tube (10) by roundlet hole (6), and spirit lamp (8) places the below of middle-end glass tube (4).
2. thermal convection as claimed in claim 1 and heat conducting contrast experiment's device is characterized in that the length of described glass tube (10) is 80 centimetres, and internal diameter is 1.8 centimetres.
3. thermal convection as claimed in claim 1 and heat conducting contrast experiment's device is characterized in that, described high-end glass tube (3) is connected with middle-end glass tube (4) and is " L " type, and described low side glass tube (5) is " U " type, and the mouth of pipe upwards.
4. thermal convection as claimed in claim 1 and heat conducting contrast experiment's device is characterized in that the diameter in described roundlet hole (6) is 0.5 centimetre.
5. thermal convection as claimed in claim 1 and heat conducting contrast experiment's device is characterized in that the opening part of described high-end glass tube (3) is provided with a groove.
6. thermal convection as claimed in claim 1 and heat conducting contrast experiment's device is characterized in that the length of described high-end glass tube (3) is 30 centimetres, and the height of low side glass tube (4) is 18 centimetres.
7. thermal convection as claimed in claim 1 and heat conducting contrast experiment's device is characterized in that, described spirit lamp (8) hot spot keeps identical with the distance of two sides temperature meter (1) glass envelope measurement point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201572385U CN201348836Y (en) | 2008-12-17 | 2008-12-17 | Contrast experiment apparatus for heat convection and heat conduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201572385U CN201348836Y (en) | 2008-12-17 | 2008-12-17 | Contrast experiment apparatus for heat convection and heat conduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201348836Y true CN201348836Y (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201572385U Expired - Fee Related CN201348836Y (en) | 2008-12-17 | 2008-12-17 | Contrast experiment apparatus for heat convection and heat conduction |
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| Country | Link |
|---|---|
| CN (1) | CN201348836Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575193A (en) * | 2015-01-13 | 2015-04-29 | 周维保 | Liquid heat conduction test device |
| CN105092634A (en) * | 2015-07-16 | 2015-11-25 | 广州市心德实业有限公司 | Miniature evaporation measurement test apparatus and method for applying same to perform solution evaporation test |
-
2008
- 2008-12-17 CN CNU2008201572385U patent/CN201348836Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575193A (en) * | 2015-01-13 | 2015-04-29 | 周维保 | Liquid heat conduction test device |
| CN105092634A (en) * | 2015-07-16 | 2015-11-25 | 广州市心德实业有限公司 | Miniature evaporation measurement test apparatus and method for applying same to perform solution evaporation test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20101217 |