CN208480210U - A kind of circuit unit enabling PCB element constant temperature - Google Patents
A kind of circuit unit enabling PCB element constant temperature Download PDFInfo
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- CN208480210U CN208480210U CN201821320065.4U CN201821320065U CN208480210U CN 208480210 U CN208480210 U CN 208480210U CN 201821320065 U CN201821320065 U CN 201821320065U CN 208480210 U CN208480210 U CN 208480210U
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- constant temperature
- pcb
- heating device
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Abstract
The utility model discloses a kind of circuit units for enabling PCB element constant temperature, including pcb board, heating tube and thermistor, heating tube is fixedly welded on pcb board, heating device T1 is connected in heating tube, element 1 and element 2 are provided on pcb board, element 1 and element 2 are the devices for needing constant temperature, are being placed with thermistor close to the place of element 1 and element 2, thermistor is connected with amplifier N1；The utility model enables the circuit unit of PCB element constant temperature, heating tube is heated using heating device T1, since switching tube switching moments can be lossy, the loss is released in a manner of heat, on-off times are more, the heat of releasing is also more, and so as to heat to pcb board, the electronic component on PCB will also be heated.Place thermistor close to the place of PCB element, the resistance value of thermistor can variation with temperature and change, output adjusting is carried out using amplifier N1, control action is carried out to the switch of heating device T1, to reach thermostat temperature.
Description
Technical field
The utility model relates to a kind of circuit unit, in particular to a kind of circuit unit for enabling PCB element constant temperature.
Background technique
In certain applications, it would be desirable to which component, which works at metastable temperature, guarantees the accurate of measurement
Property, such as feedback amplifier when measurement weak current, since amplification factor is very high, environment temperature slight variation will be right
Measurement accuracy has an immense impact on, and at this moment needs to carry out constant temperature processing to measuring circuit, there is presently no the replies of relative maturity
Scheme；Based on disadvantages described above, we develop a kind of constant-temperature circuit component that can solve disadvantages described above in daily experience.
Utility model content
The technical problems to be solved in the utility model be overcome it is existing to measuring circuit carry out constant temperature processing, there is presently no
The defect of the counte-rplan of relative maturity provides a kind of circuit unit for enabling PCB element constant temperature, to solve the above problems.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution:
The utility model provides a kind of circuit unit for enabling PCB element constant temperature, including pcb board, heating tube and thermistor,
It is fixedly welded with heating tube on pcb board, heating device T1 is connected in heating tube, heating device T1 is separately connected amplifier N1's
4th pin, the 6th pin and the 7th pin are provided with current-limiting resistance on the route of the 4th pin of heating device T1 connection amplifier N1
Control current-limiting resistance R7 is provided on the route of the 6th pin of R8, heating device T1 connection amplifier N1, heating device T1 connection is put
It is provided with power-supply filter C2 on the route of big the 7th pin of device N1, control signal divider resistance R9 is parallel on heating device T1,
Input resistance R3 and input resistance R4 are connected on the 2nd pin and the 3rd pin of amplifier N1, and member is provided on pcb board
Part A and element B, element A and element B are the devices for needing constant temperature, are placed with temperature-sensitive electricity in the place close to element A and element B
Resistance, thermistor connect the 3rd pin and the 7th pin of amplifier N1, and thermistor is connected with divider resistance R5.
As a kind of optimal technical scheme of the utility model, pcb board is using aluminum substrate.
As a kind of optimal technical scheme of the utility model, the connection of input resistance R3 and control signal divider resistance R9
Feedback resistance R6 is provided on route.
As a kind of optimal technical scheme of the utility model, heating device T1 selects MOSFET, is encapsulated as TO-220, outside
Shell aluminum material.
As a kind of optimal technical scheme of the utility model, thermistor uses NTC type 100K resistance.
As a kind of optimal technical scheme of the utility model, current-limiting resistance R8 is that heating speed adjusts resistance.
The utility model beneficial effect achieved is: the utility model enables the circuit unit of PCB element constant temperature, PCB choosing
With aluminium base plate material, so as to thermally conductive, heating tube is heated using heating device T1, since switching tube switching moments can damage
Consumption, the loss are released in a manner of heat, and on-off times are more, and the heat of releasing is also more, so as to be heated to pcb board,
Electronic component on PCB will also be heated.Place NTC thermistor, the resistance value meeting of thermistor in place close to PCB element
Variation with temperature and change, so that actual temperature signal is passed to temperature controller, that is, high-accuracy arithmetic amplification
Device N1 is to carry out output adjusting, that is, carries out control action to the switch of heating device T1, to reach required thermostat temperature.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.
In the accompanying drawings:
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the utility model circuit theory schematic diagram；
Figure label: 1, pcb board；2, heating tube；3, element A；4, thermistor；5, element B.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment: as shown in Figs. 1-2, the utility model provides a kind of circuit unit for enabling PCB element constant temperature, including PCB
Plate 1, heating tube 2 and thermistor 4 are fixedly welded with heating tube 2 on pcb board 1, heating device T1 are connected in heating tube 2,
Heating device T1 is separately connected the 4th pin, the 6th pin and the 7th pin of amplifier N1, heating device T1 connection amplifier N1
It is provided with current-limiting resistance R8 on the route of 4 pins, is provided with control on the route of the 6th pin of heating device T1 connection amplifier N1
Power-supply filter C2, heating device T1 are provided on the route of the 7th pin of current-limiting resistance R7, heating device T1 connection amplifier N1
On be parallel with control signal divider resistance R9, input resistance R3 and input resistance R4 and be connected to the 2nd pin of amplifier N1
On the 3rd pin, element 3A and element B5 are provided on pcb board 1, element A3 and element B5 are the devices for needing constant temperature, are being leaned on
The place of nearly element A3 and element B5 is placed with thermistor 4, and the 3rd pin and the 7th that thermistor 4 connects amplifier N1 draws
Foot changes the temperature for needing temperature by adjusting the resistance value size of divider resistance R5, and stationary temperature range is environment temperature
To 60 DEG C, heating tube 2 is heated using heating device T1, and since switching tube switching moments can be lossy, the loss is with heat
Mode release, on-off times are more, and the heat of releasing is also more, the electronics so as to heat to pcb board 1, on pcb board 1
Element will also be heated.Thermistor 4 is placed close to the place of PCB element, the resistance value of thermistor 4 can variation with temperature
And change, so that it is defeated to carry out that actual temperature signal is passed to temperature controller, that is, high precision operating amplifier N1
It adjusts out, that is, control action is carried out to the switch of heating device T1, to reach required thermostat temperature.
Further, for pcb board 1 using aluminum substrate, heating conduction is more preferable.
Further, heating device T1 selects MOSFET, is encapsulated as TO-220, shell aluminum material, and heating conduction is more preferable.
Further, thermistor 4 uses NTC type 100K resistance, and temperature is higher, and resistance value is lower, and feedback voltage is bigger, bears
With regard to big, the heating device T1 opening time will also shorten feedback regulation dynamics.
Further, current-limiting resistance R8 is that heating speed adjusts resistance, and resistance value is smaller, and thermostatic speed is faster, usually
In 15-30 Ω, constant temperature time is 10-20 minutes.
Specific: the utility model enables the circuit unit of PCB element constant temperature, and heating tube 2 is fixedly welded on pcb board 1,
For pcb board 1 using aluminum substrate, heating conduction is more preferable；Heating device T1 is connected in heating tube 2, heating device T1 is selected
MOSFET is encapsulated as TO-220, and shell aluminum material, heating conduction is more preferable, and what heating device T1 was separately connected amplifier N1 the 4th draws
Foot, the 6th pin and the 7th pin are provided with current-limiting resistance R8 on the route of the 4th pin of heating device T1 connection amplifier N1, limit
Leakage resistance R8 is that heating speed adjusts resistance, and resistance value is smaller, and thermostatic speed is faster, and usually in 15-30 Ω, constant temperature time is
10-20 minutes, control current-limiting resistance R7, heating device are provided on the route of the 6th pin of heating device T1 connection amplifier N1
It is provided with power-supply filter C2 on the route of the 7th pin of T1 connection amplifier N1, control signal point is parallel on heating device T1
Piezoresistance R9, input resistance R3 and input resistance R4 are connected on the 2nd pin and the 3rd pin of amplifier N1.
Element 3A and element B5 are provided on pcb board 1, element A3 and element B5 are the devices for needing constant temperature, close to member
The place of part A3 and element B5 are placed with thermistor 4, and thermistor 4 uses NTC type 100K resistance, and temperature is higher, and resistance value is got over
Low, feedback voltage is bigger, and with regard to big, the heating device T1 opening time will also shorten negative-feedback regu- lation dynamics, and the connection of thermistor 4 is put
The 3rd pin and the 7th pin of big device N1, changes the temperature for needing temperature by adjusting the resistance value size of divider resistance R5, permanent
Fixed temperature range is environment temperature to 60 DEG C, and heating tube 2 is heated using heating device T1, due to switching tube switching moments
Can be lossy, which is released in a manner of heat, and on-off times are more, and the heat of releasing is also more, so as to give pcb board
1 heats, and the electronic component on pcb board 1 will also be heated.Place thermistor 4, thermistor 4 in place close to PCB element
Resistance value can variation with temperature and change, so that actual temperature signal is passed to temperature controller, that is, in high precision
Operational amplifier N1 is to carry out output adjusting, that is, carries out control action to the switch of heating device T1, to reach required
Thermostat temperature.
Finally, it should be noted that the above is only the preferred embodiment of the utility model, it is not limited to practical
It is novel, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all include
It is within the protection scope of the utility model.
Claims (6)
1. a kind of circuit unit for enabling PCB element constant temperature, which is characterized in that including pcb board (1), heating tube (2) and thermistor
(4), it is fixedly welded with heating tube (2) on pcb board (1), heating device T1, heating device T1 difference is connected in heating tube (2)
The 4th pin, the 6th pin and the 7th pin for connecting amplifier N1, on the route of the 4th pin of heating device T1 connection amplifier N1
It is provided with current-limiting resistance R8, control current-limiting resistance R7 is provided on the route of the 6th pin of heating device T1 connection amplifier N1, is added
It is provided with power-supply filter C2 on the route of the 7th pin of thermal device T1 connection amplifier N1, control is parallel on heating device T1
Signal divider resistance R9, input resistance R3 and input resistance R4 are connected on the 2nd pin and the 3rd pin of amplifier N1,
Element A (3) and element B (5) are provided on pcb board, element A (3) and element B (5) are the devices for needing constant temperature, close to element
The place of A and element B are placed with thermistor (4), and thermistor (4) connects the 3rd pin and the 7th pin of amplifier N1, heat
Quick resistance (4) is connected with divider resistance R5.
2. a kind of circuit unit for enabling PCB element constant temperature according to claim 1, which is characterized in that pcb board (1) uses
Be aluminum substrate.
3. a kind of circuit unit for enabling PCB element constant temperature according to claim 1, which is characterized in that input resistance R3 and
It controls and is provided with feedback resistance R6 in the connection line of signal divider resistance R9.
4. a kind of circuit unit for enabling PCB element constant temperature according to claim 1, which is characterized in that heating device T1 choosing
With MOSFET, it is encapsulated as TO-220, shell aluminum material.
5. a kind of circuit unit for enabling PCB element constant temperature according to claim 1, which is characterized in that thermistor (4) makes
With NTC type 100K resistance.
6. a kind of circuit unit for enabling PCB element constant temperature according to claim 1, which is characterized in that current-limiting resistance R8 is
It heats speed and adjusts resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821320065.4U CN208480210U (en) | 2018-08-15 | 2018-08-15 | A kind of circuit unit enabling PCB element constant temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821320065.4U CN208480210U (en) | 2018-08-15 | 2018-08-15 | A kind of circuit unit enabling PCB element constant temperature |
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| Publication Number | Publication Date |
|---|---|
| CN208480210U true CN208480210U (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821320065.4U Active CN208480210U (en) | 2018-08-15 | 2018-08-15 | A kind of circuit unit enabling PCB element constant temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111330059A (en) * | 2020-03-31 | 2020-06-26 | 惠州市顺鑫宏电子科技有限公司 | USB interface low pressure champignon heater |
| CN113993229A (en) * | 2021-11-04 | 2022-01-28 | 南昌三瑞智能科技有限公司 | Electronic speed regulator integrating capacitor temperature control, temperature control method and unmanned aerial vehicle |
-
2018
- 2018-08-15 CN CN201821320065.4U patent/CN208480210U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111330059A (en) * | 2020-03-31 | 2020-06-26 | 惠州市顺鑫宏电子科技有限公司 | USB interface low pressure champignon heater |
| CN113993229A (en) * | 2021-11-04 | 2022-01-28 | 南昌三瑞智能科技有限公司 | Electronic speed regulator integrating capacitor temperature control, temperature control method and unmanned aerial vehicle |
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