CN203719098U - Precise temperature control electric heating sleeve - Google Patents
Precise temperature control electric heating sleeve Download PDFInfo
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- CN203719098U CN203719098U CN201320835088.XU CN201320835088U CN203719098U CN 203719098 U CN203719098 U CN 203719098U CN 201320835088 U CN201320835088 U CN 201320835088U CN 203719098 U CN203719098 U CN 203719098U
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- resistance
- triode
- electric heating
- operational amplifier
- diode
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Abstract
The utility model discloses a precise temperature control electric heating sleeve, which comprises an electric heating sleeve, a control circuit and a temperature measuring module, wherein the temperature measuring module is connected with the input end of the control circuit through a flexible data wire, the control end of the control circuit is connected with a heating module arranged under a heating hole of the electric heating sleeve, and the temperature measuring module comprises a thermosensitive diode. The precise temperature control electric heating sleeve has the advantages that the thermosensitive diode in a smaller size is put into heating medicine liquid, the temperature of the located temperature point can be precisely measured, and the precise temperature control is realized; the temperature measuring module is connected with the control circuit through the flexible data wire, the electric heating sleeve can adapt to various heating vessels, and inconvenience caused by temperature indicator replacement is reduced.
Description
Technical field
The utility model relates to a kind of electric heater unit, specifically a kind of accurate temperature controlling electric heating cover.
Background technology
At present, although the widely used heating jacket in laboratory can be realized electron temperature-control function, but they can only control the temperature of heating module, because internal fluid heat conduction is inhomogeneous, the temperature of heating module often differs larger with medicine temperature, so, this heating jacket of artificially adjusting the temperature of heating module by observing thermometer, cannot accurately control the temperature of heated medicine, causes heating-up temperature inaccuracy, easily there is side reaction and make product impure, even cause danger.
Summary of the invention
The deficiency existing for overcoming above-mentioned prior art, the utility model provides a kind of accurate temperature controlling electric heating cover, and it not only can accurately measure the temperature of heating medicine, and can automatically control the temperature of heating medicine.
The technical scheme in the invention for solving the technical problem is: a kind of accurate temperature controlling electric heating cover, comprise electric heating cover and control circuit, it is characterized in that, also comprise temperature measurement module, described temperature measurement module is connected with the input of control circuit by data wire, and the control end of described control circuit is connected with the heating module that is arranged on electric heating cover bottoming hole below;
Described temperature measurement module comprises thermal diode D1, described control circuit comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, adjustable resistance RW1, adjustable resistance RW2, diode D2, triode Q1, triode Q2, triode Q3 and operational amplifier A 1, and described heating module comprises heating resistor RL;
Wherein, the negative pole of described thermal diode D1 is connected with the positive pole of diode D2 with one end of resistance R 1, one end of adjustable resistance RW1, the other end of described adjustable resistance RW1 is connected with one end of resistance R 2 with adjustable end, and the other end of described resistance R 2 is connected with the base stage of triode Q1 with one end of resistance R 3; The colelctor electrode of described triode Q1 is connected with the inverting input of operational amplifier A 1 with the negative pole of diode D2, and the emitter stage of triode Q1 is connected with one end of resistance R 4; The in-phase input end of described operational amplifier A 1 is connected with the adjustable end of adjustable resistance RW2, and output is connected with one end of resistance R 7; The two ends of described adjustable resistance RW2 are connected with one end of resistance R 6 with one end of resistance R 5 respectively, the other end of described resistance R 7 is connected with the base stage of triode Q2, the emitter stage of described triode Q2 is connected with the base stage of triode Q3, and the emitter stage of described triode Q3 is connected with one end of heating resistor RL; The colelctor electrode of the colelctor electrode of the positive power source terminal of the other end of the other end of described resistance R 1, resistance R 5, operational amplifier A 1, triode Q2 and triode Q3 accesses respectively 15V power supply terminal and is connected, and the other end of the other end of the positive pole of described thermal diode D1, resistance R 3, the other end of resistance R 4, the other end of resistance R 6, the negative power end of operational amplifier A 1 and heating resistor RL is connected with ground terminal respectively.
Preferably, described data wire adopts flexible data line.
Preferably, described thermal diode D1 adopts germanium diode.
Preferably, described operational amplifier A 1 adopts UA741 operational amplifier.
The beneficial effects of the utility model are that the utility model, by the thermal diode of small volume being put into heating medicine liquid, can accurately be measured the temperature of place temperature spot, realizes accurate temperature controlling; Temperature measurement module is connected with control circuit by flexible data line, can allow this electric heating cover adapt to various heating vessels, has reduced the inconvenience of changing thermometer.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is circuit diagram of the present utility model.
In Fig. 1,1 electric heating cover, 2 control circuits, 3 temperature measurement modules, 4 data wires, 5 bottoming holes, 6 heating modules, 7 flasks.
The specific embodiment
As shown in Figure 1, a kind of accurate temperature controlling electric heating cover of the present utility model, it comprises electric heating cover 1, control circuit 2 and temperature measurement module 3, described temperature measurement module 3 is connected with the input of control circuit 2 by flexible data line 4, and the control end of described control circuit 2 is connected with the heating module 6 that is arranged on electric heating cover bottoming hole 5 belows.
As shown in Figure 2, temperature measurement module 3 described in the utility model comprises thermal diode D1, described control circuit 2 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, adjustable resistance RW1, adjustable resistance RW2, diode D2, triode Q1, triode Q2, triode Q3 and operational amplifier A 1, and described heating module 6 comprises heating resistor RL; The negative pole of described thermal diode D1 is connected with the positive pole of diode D2 with one end of resistance R 1, one end of adjustable resistance RW1, the other end of described adjustable resistance RW1 is connected with one end of resistance R 2 with adjustable end, and the other end of described resistance R 2 is connected with the base stage of triode Q1 with one end of resistance R 3; The colelctor electrode of described triode Q1 is connected with the inverting input of operational amplifier A 1 with the negative pole of diode D2, and the emitter stage of triode Q1 is connected with one end of resistance R 4; The in-phase input end of described operational amplifier A 1 is connected with the adjustable end of adjustable resistance RW2, and output is connected with one end of resistance R 7; The two ends of described adjustable resistance RW2 are connected with one end of resistance R 6 with one end of resistance R 5 respectively, the other end of described resistance R 7 is connected with the base stage of triode Q2, the emitter stage of described triode Q2 is connected with the base stage of triode Q3, and the emitter stage of described triode Q3 is connected with one end of heating resistor RL; The colelctor electrode of the colelctor electrode of the positive power source terminal of the other end of the other end of described resistance R 1, resistance R 5, operational amplifier A 1, triode Q2 and triode Q3 accesses respectively 15V power supply terminal and is connected, and the other end of the other end of the positive pole of described thermal diode D1, resistance R 3, the other end of resistance R 4, the other end of resistance R 6, the negative power end of operational amplifier A 1 and heating resistor RL is connected with ground terminal respectively.Wherein, described thermal diode D1 adopts germanium diode, and described operational amplifier A 1 adopts UA741 operational amplifier.
The utility model utilizes thermal diode that temperature signal is transformed into the signal of telecommunication, thereby has effectively realized the feedback of temperature to heater circuit, with this, controls the switch of heating module, realizes the control to temperature.During use, take and prepare sodium cinnamate and describe as example, first the flask 7 that adds 1.0g potash, 7ml acetic anhydride and 2.5ml benzaldehyde is placed in bottoming hole 5, the end of temperature measurement module 3 (being germanium thermal diode) is placed in flask 7 and submerged below liquid level, start electric heating cover 1 and utilize heating module 6 to heat, setting 130 ℃ of expection heating-up temperatures is reference voltage.Start after heating, because fluid temperature is lower than design temperature, negative terminal voltage is lower than reference voltage, circuit turn-on, and heating module starts heating.After being heated to design temperature, negative terminal voltage is higher than reference voltage, circuit automatic cut-off, and heating module stops heating, guarantees that fluid temperature is constant no longer to change on design temperature.Because the germanium diode temperature range adopting is between 77-300 ℃, has not only guaranteed the accurate temperature controlling of temperature domain of walker in ± 0.1 ℃, and met general laboratory and add heat request.
The above is preferred embodiment of the present utility model; for those skilled in the art; not departing under the prerequisite of the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection domain of the present utility model.
Claims (4)
1. an accurate temperature controlling electric heating cover, comprise electric heating cover and control circuit, it is characterized in that, also comprise temperature measurement module, described temperature measurement module is connected with the input of control circuit by data wire, and the control end of described control circuit is connected with the heating module that is arranged on electric heating cover bottoming hole below;
Described temperature measurement module comprises thermal diode D1, described control circuit comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, adjustable resistance RW1, adjustable resistance RW2, diode D2, triode Q1, triode Q2, triode Q3 and operational amplifier A 1, and described heating module comprises heating resistor RL;
Wherein, the negative pole of described thermal diode D1 is connected with the positive pole of diode D2 with one end of resistance R 1, one end of adjustable resistance RW1, the other end of described adjustable resistance RW1 is connected with one end of resistance R 2 with adjustable end, and the other end of described resistance R 2 is connected with the base stage of triode Q1 with one end of resistance R 3; The colelctor electrode of described triode Q1 is connected with the inverting input of operational amplifier A 1 with the negative pole of diode D2, and the emitter stage of triode Q1 is connected with one end of resistance R 4; The in-phase input end of described operational amplifier A 1 is connected with the adjustable end of adjustable resistance RW2, and output is connected with one end of resistance R 7; The two ends of described adjustable resistance RW2 are connected with one end of resistance R 6 with one end of resistance R 5 respectively, the other end of described resistance R 7 is connected with the base stage of triode Q2, the emitter stage of described triode Q2 is connected with the base stage of triode Q3, and the emitter stage of described triode Q3 is connected with one end of heating resistor RL; The colelctor electrode of the colelctor electrode of the positive power source terminal of the other end of the other end of described resistance R 1, resistance R 5, operational amplifier A 1, triode Q2 and triode Q3 accesses respectively 15V power supply terminal and is connected, and the other end of the other end of the positive pole of described thermal diode D1, resistance R 3, the other end of resistance R 4, the other end of resistance R 6, the negative power end of operational amplifier A 1 and heating resistor RL is connected with ground terminal respectively.
2. a kind of accurate temperature controlling electric heating cover according to claim 1, is characterized in that, described data wire adopts flexible data line.
3. a kind of accurate temperature controlling electric heating cover according to claim 1, is characterized in that, described thermal diode D1 adopts germanium diode.
4. a kind of accurate temperature controlling electric heating cover according to claim 1, is characterized in that, described operational amplifier A 1 adopts UA741 operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835088.XU CN203719098U (en) | 2013-12-17 | 2013-12-17 | Precise temperature control electric heating sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835088.XU CN203719098U (en) | 2013-12-17 | 2013-12-17 | Precise temperature control electric heating sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203719098U true CN203719098U (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320835088.XU Expired - Fee Related CN203719098U (en) | 2013-12-17 | 2013-12-17 | Precise temperature control electric heating sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203719098U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713218A (en) * | 2013-12-17 | 2015-06-17 | 马琳 | Accurate temperature-control electric heating jacket |
-
2013
- 2013-12-17 CN CN201320835088.XU patent/CN203719098U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713218A (en) * | 2013-12-17 | 2015-06-17 | 马琳 | Accurate temperature-control electric heating jacket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20141217 |
|
| EXPY | Termination of patent right or utility model |