CN106598101A - Constant-temperature control circuit - Google Patents
Constant-temperature control circuit Download PDFInfo
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- CN106598101A CN106598101A CN201510675402.6A CN201510675402A CN106598101A CN 106598101 A CN106598101 A CN 106598101A CN 201510675402 A CN201510675402 A CN 201510675402A CN 106598101 A CN106598101 A CN 106598101A
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Abstract
The invention discloses a constant-temperature control circuit, and the circuit comprises a power circuit, a temperature detection circuit, a reference voltage circuit, a temperature indication circuit, a voltage comparison circuit, and a control execution circuit. The power circuit consists of a power switch, a power transformer, a rectification bridge pile, a filter capacitor, a three-end voltage-stabilizing integrated circuit, a current limiting resistor, and a power indication light-emitting diode. The temperature detection circuit consists of a transistor-type temperature sensor, a resistor, a capacitor, and an N1 in an operational amplifier integrated circuit. The reference voltage circuit consists of a resistor, a potentiometer, a voltage-stabilizing diode, and an N4 in an IC1. The temperature indication circuit consists of a resistor, an internal N2, and a voltmeter PV. The voltage comparison and amplification circuit consists of an N3 in the IC1 and a resistor. The control execution circuit consists of a resistor and a transistor. The control circuit is reasonable in structure design, is wide and precise in temperature control range, and is suitable for various types of industrial and agricultural production aspects.
Description
Technical field
The invention belongs to automation control area, and in particular to a kind of constant temperature control circuit.
Background technology
Industrialized agriculture is one of current most great-hearted new industry, and its medium temperature chamber is then the Type Equipment of industrialized agriculture.Greenhouse is
One kind can change plant growth environment, optimum condition is created for plant growing, extraneous Four seasons change and harsh weather is avoided to it
The place of impact, it has and rationally utilize agricultural resource, preserve the ecological environment, improve the advantages such as agricultural output.Green house control
Technology is current frontier nature research field in the world, and its key technology is that the envirment factors such as temperature, humidity, illumination are acquired
And effectively controlled, the final goal of the technology is to improve control and homework precision.
With agricultural greenhouse scale and the continuous improvement of industrialization level, the multiple temperature to being distributed in certain area coverage are needed
Room or greenhouse group are monitored and control, therefore, monitoring and the control device of multiple greenhouses or greenhouse group are researched and developed, to many
Individual greenhouse is managed tool and is of great significance, and many greenhouses control devices have a good application prospect.
Automatization's timing control circuit complex structure of the prior art, difficult wiring and control complexity, loss is serious, and makes
It is relatively costly, be not suitable for promoting the use of.
The content of the invention
Goal of the invention：The invention aims to solve deficiency of the prior art, there is provided a kind of reasonable in design, temperature
Span of control is wide and a kind of accurate constant temperature control circuit.
Technical scheme：A kind of constant temperature control circuit of the present invention, the control circuit include power circuit, temperature sensing circuit,
Reference voltage circuit, temperature indicator circuit, voltage comparator circuit and control execution circuit；The power circuit by and off switch S,
Mains transformer T, rectifier bridge stack UR, filter capacitor C1, C2, circuit of three-terminal voltage-stabilizing integrated IC2, current-limiting resistor R10
With power supply instruction light emitting diode VL1 compositions；The temperature sensing circuit is by transistor type temperature sensor V1, resistor R1、
The internal N1 compositions of capacitor C3 and operational amplifier integrated circuit IC1 (N1～N4)；The reference voltage circuit is by resistance
Device R4, R5, R8, potentiometer RP1～RP3, the N4 compositions inside Zener diode vs and IC1；The temperature indicates electricity
N2 and voltmeter PV composition inside routing resistance device R2, R3, IC1；The voltage contrasting amplified circuit by IC1 inside
N3 and resistor R6, R7 are constituted；The control execution circuit is by resistor R9, transistor V2, relay K, diode
VD and work indication light diode vL2 compositions.
Further, 3 feet of the circuit of three-terminal voltage-stabilizing integrated IC2 are connected in parallel to rectifier bridge stack UR and filter capacitor C1,
Filter capacitor C2, the circuit of three-terminal voltage-stabilizing integrated IC2 are connected between 1 foot and 2 feet of the circuit of three-terminal voltage-stabilizing integrated IC2
1 foot be connected in series current-limiting resistors R10 and power supply instruction light emitting diode VL1 simultaneously.
Further, the circuit of three-terminal voltage-stabilizing integrated IC2 adopts 78L09 circuit of three-terminal voltage-stabilizing integrated.
Further, the transistor type temperature sensor V1 and resistor R1 respectively with operational amplifier integrated circuit IC1 in
The 3 feet connection of portion N1,4 feet of the N1 are connected with capacitor C3 and are grounded, and 2 feet of the N1 are connected with 1 foot；
Operational amplifier integrated circuit IC1 adopts LM324 type four high guaily unit integrated circuits, transistor type temperature sensor V1 to select
MTS-102 transistor npn npn formula temperature sensors.
Further, 5 feet of the N2 inside operational amplifier integrated circuit IC1 are by potentiometer RP1 and resistor
R4 is connected with 12 feet of the N4 inside operational amplifier integrated circuit IC1, and 12 feet of the N4 are also associated with the pole of voltage stabilizing two
13 feet of pipe VS and resistor R5, the N4 are connected with 14 feet, 14 feet of the N4 be also associated with potentiometer RP2,
RP3 and resistor R8.
Further, 6 feet of the N2 inside operational amplifier integrated circuit IC1 are connected to resistor R2 and R3,
The resistor R3 is also associated with 7 feet of N2, and 7 feet of the N2 are also associated with voltmeter PV.
Further, 9 feet of the N3 inside operational amplifier integrated circuit IC1 are connected with resistor R6, the N3
8 feet and 10 feet between be connected with resistor R7, while 10 feet of N3 are also associated with resistor R8.
Further, 8 feet of the N3 inside operational amplifier integrated circuit IC1 are connected in series with resistor R9 and crystal
The emitter stage of pipe V2, the transistor V2 is connected with relay K and work indication light diode VL2, the relay
K is also connected in parallel to diode VD.
Further, described resistor R1, R4～R10 is from metal film resistor or carbon film resistor；Resistor R2 and
R3 is from the metal film resistor that precision is 1%；Potentiometer RP1～RP3 selects small-sized synthesis membrane potentiometer；C1 and
C2 is from the aluminium electrolutic capacitor that pressure voltage is 16V；C3 is from monolithic capacitor or dacron terylene condenser；VD is selected
1N4001 or 1N4007 type silicon rectifier diodes；Silicon voltage regulator diodes of the VS from 1W, 6V or so；VL1 and VL2
From the light emitting diode of ￠ 5mm, VL1 is redness, and VL2 is green；UR selects the rectifier bridge stack of IA, 50Y,
Also can be with replacement after 4 1N4001 bridge joints；V1 selects MTS-102 transistor npn npn formula temperature sensors；V2 selects 58050
Type silicon PNP transistor；IC1 selects LM324 type four high guaily unit integrated circuits；IC2 is integrated from 78L09 type three-terminal voltage-stabilizings
Circuit；K selects JRX-13F type 9V DC relays；Voltmeters of the PV from 1000mV；T from 3～5W,
Secondary voltage is the mains transformer of 12Y；Ac power switch of the S from 5A, 220V.
Beneficial effect：Present configuration is reasonable in design, and temperature controlling range is wide and accurate, temperature controlling range up to 5-95 DEG C,
And it is whole be capable of achieving unmanned automation mechanized operation temperature control, and formed using integrated chip manufacturing, low manufacture cost and be easily achieved,
Suitable all types of industries and agricultural production aspect are used.
Description of the drawings
Fig. 1 is the structure principle chart of the control circuit of the present invention.
Specific embodiment
A kind of constant temperature control circuit as shown in Figure 1, the control circuit includes power circuit, temperature sensing circuit, reference voltage
Circuit, temperature indicator circuit, voltage comparator circuit and control execution circuit；The power circuit is become by and off switch S, power supply
Depressor T, rectifier bridge stack UR, filter capacitor C1, C2, circuit of three-terminal voltage-stabilizing integrated IC2, current-limiting resistor R10And electricity
Source indication light diode VL1 compositions；The temperature sensing circuit is by transistor type temperature sensor V1, resistor R1, electric capacity
The internal N1 compositions of device C3 and operational amplifier integrated circuit IC1 (N1～N4)；The reference voltage circuit by resistor R4,
R5, R8, potentiometer RP1～RP3, the N4 compositions inside Zener diode vs and IC1；The temperature indicator circuit is by electricity
N2 and voltmeter PV compositions inside resistance device R2, R3, IC1；The voltage contrasting amplified circuit by the N3 inside IC1 and
Resistor R6, R7 are constituted；It is described control execution circuit by resistor R9, transistor V2, relay K, diode VD and
Work indication light diode vL2 compositions.
Further, 3 feet of the circuit of three-terminal voltage-stabilizing integrated IC2 are connected in parallel to rectifier bridge stack UR and filter capacitor C1,
Filter capacitor C2, the circuit of three-terminal voltage-stabilizing integrated IC2 are connected between 1 foot and 2 feet of the circuit of three-terminal voltage-stabilizing integrated IC2
1 foot be connected in series current-limiting resistors R10 and power supply instruction light emitting diode VL1 simultaneously.
Further, the circuit of three-terminal voltage-stabilizing integrated IC2 adopts 78L09 circuit of three-terminal voltage-stabilizing integrated.
Further, the transistor type temperature sensor V1 and resistor R1 respectively with operational amplifier integrated circuit IC1 in
The 3 feet connection of portion N1,4 feet of the N1 are connected with capacitor C3 and are grounded, and 2 feet of the N1 are connected with 1 foot；
Operational amplifier integrated circuit IC1 adopts LM324 type four high guaily unit integrated circuits, transistor type temperature sensor V1 to select
MTS-102 transistor npn npn formula temperature sensors.
Further, 5 feet of the N2 inside operational amplifier integrated circuit IC1 are by potentiometer RP1 and resistor
R4 is connected with 12 feet of the N4 inside operational amplifier integrated circuit IC1, and 12 feet of the N4 are also associated with the pole of voltage stabilizing two
13 feet of pipe VS and resistor R5, the N4 are connected with 14 feet, 14 feet of the N4 be also associated with potentiometer RP2,
RP3 and resistor R8.
Further, 6 feet of the N2 inside operational amplifier integrated circuit IC1 are connected to resistor R2 and R3,
The resistor R3 is also associated with 7 feet of N2, and 7 feet of the N2 are also associated with voltmeter PV.
Further, 9 feet of the N3 inside operational amplifier integrated circuit IC1 are connected with resistor R6, the N3
8 feet and 10 feet between be connected with resistor R7, while 10 feet of N3 are also associated with resistor R8.
Further, 8 feet of the N3 inside operational amplifier integrated circuit IC1 are connected in series with resistor R9 and crystal
The emitter stage of pipe V2, the transistor V2 is connected with relay K and work indication light diode VL2, the relay
K is also connected in parallel to diode VD.
The selection of components and parts：Resistor R1, R4～R10 is from metal film resistor or carbon film resistor；Resistor R2 and
R3 is from the metal film resistor that precision is 1%；Potentiometer RP1～RP3 selects small-sized synthesis membrane potentiometer；C1 and
C2 is from the aluminium electrolutic capacitor that pressure voltage is 16V；C3 is from monolithic capacitor or dacron terylene condenser；VD is selected
1N4001 or 1N4007 type silicon rectifier diodes；Silicon voltage regulator diodes of the VS from 1W, 6V or so；VL1 and VL2
From the light emitting diode of ￠ 5mm, VL1 is redness, and VL2 is green；UR selects the rectifier bridge stack of IA, 50Y,
Also can be with replacement after 4 1N4001 bridge joints；V1 selects MTS-102 transistor npn npn formula temperature sensors；V2 selects 58050
Type silicon PNP transistor；IC1 selects LM324 type four high guaily unit integrated circuits；IC2 is integrated from 78L09 type three-terminal voltage-stabilizings
Circuit；K selects JRX-13F type 9V DC relays；Voltmeters of the PV from 1000mV；T from 3～5W,
Secondary voltage is the mains transformer of 12Y；Ac power switch of the S from 5A, 220V.
The control process of control circuit of the present invention is：
Switch on power switch S, alternating current 220V voltage Jing T blood pressure lowerings, UR rectifications, C1 filtering and IC2 voltage stabilizings after, be IC1,
Reference voltage circuit and control execution circuit provide+9V running voltages, while VL1 is lighted.+ 9V voltage Jing R5 current limlitings VS
The reference voltage of+6V or so is produced after voltage stabilizing, all the way the positive input end Jing after R4, RP1 partial pressure for N2 provides benchmark electricity
Pressure：Another Lu Xianjing N4 Hyblid Buffer Amplifiers, then Jing after RP2, RP3 partial pressure, then Jing R8 add to the positive input end of M,
As the reference voltage of N3.
The voltage drop (Vbe) of V1 emitter junctions changes with the change of ambient temperature.When temperature rises, the conducting internal resistance of V1
Diminish, the voltage drop of emitter junction also reduces, making the output voltage of N1 reduces, the output voltage of N2 is raised, the output electricity of N4
Pressure then declines.
PV is used to refer to the temperature value (sensitivity is 10mV/ DEG C) of V1 detections, if PV instructed voltages value is 250mV,
Then show that temperature is 25 DEG C.
RP3 is used for setting control temperature value；RP2 is used for setting the maximum output voltage of RP3 and (adjusts the resistance of RP2, make
The maximum output voltage of RP3 is IV)；RP1 be used for set N2 positive input ends reference voltage (adjust RP1 resistance,
The normal phase input end voltage for making N2 is 530mV).
When V1 detects design temperature of the ambient temperature less than RP3, N3 outputs low level (about 0.65V) makes V2
Saturation conduction, K energization adhesives, VL2 is lighted, electric heater energization work, ambient temperature is slowly increased.When temperature is raised
During to design temperature, N3 exports low level (about 7.7V) again, ends V2, and K releases, VL2 extinguishes, electric heater
EH power-off and stop heating.Subsequently ambient temperature is again slow declines, and when temperature is down to the design temperature of RP3, K inhales again
Conjunction, EH and electrified regulation.So go round and begin again, make the temperature constant of controlled location near design temperature.
Present configuration is reasonable in design, and temperature controlling range is wide and accurate, and temperature controlling range is up to 5-95 DEG C, and whole process can be real
Existing unmanned automation mechanized operation temperature control, and being formed using integrated chip manufacturing, low manufacture cost and is easily achieved, and is adapted to all kinds of
Industrialization and agricultural production aspect are used.
The above, is only presently preferred embodiments of the present invention, and any pro forma restriction is not made to the present invention, although this
Invention is disclosed above with preferred embodiment, but is not limited to the present invention, any those skilled in the art,
In the range of technical solution of the present invention, become when making a little change using the technology contents of the disclosure above or being modified to equivalent
The Equivalent embodiments of change, as long as being the content without departing from technical solution of the present invention, implement according to the technical spirit of the present invention to more than
Any simple modification, equivalent variations and modification that example is made, still fall within the range of technical solution of the present invention.
Claims (9)
1. a kind of constant temperature control circuit, it is characterised in that：The control circuit includes power circuit, temperature sensing circuit, benchmark electricity
Volt circuit, temperature indicator circuit, voltage comparator circuit and control execution circuit；The power circuit is by and off switch S, power supply
Transformator T, rectifier bridge stack UR, filter capacitor C1, C2, circuit of three-terminal voltage-stabilizing integrated IC2, current-limiting resistor R10 and
Power supply instruction light emitting diode VL1 is constituted；The temperature sensing circuit by transistor type temperature sensor V1, resistor R1,
The internal N1 compositions of capacitor C3 and operational amplifier integrated circuit IC1 (N1～N4)；The reference voltage circuit is by resistance
Device R4, R5, R8, potentiometer RP1～RP3, the N4 compositions inside Zener diode VS and IC1；The temperature is indicated
Circuit is made up of the N2 inside resistor R2, R3, IC1 and voltmeter PV；The voltage contrasting amplified circuit is by IC1
The N3 in portion and resistor R6, R7 are constituted；It is described control execution circuit by resistor R9, transistor V2, relay K, two
Pole pipe VD and work indication light diode VL2 compositions.
2. a kind of constant temperature control circuit according to claim 1, it is characterised in that：The circuit of three-terminal voltage-stabilizing integrated IC2
3 feet be connected in parallel to rectifier bridge stack UR and filter capacitor C1,1 foot and 2 feet of the circuit of three-terminal voltage-stabilizing integrated IC2 it
Between be connected with filter capacitor C2,1 foot of the circuit of three-terminal voltage-stabilizing integrated IC2 is connected in series current-limiting resistors R10 simultaneously
With power supply instruction light emitting diode VL1.
3. a kind of constant temperature control circuit according to claim 1 and 2, it is characterised in that：The circuit of three-terminal voltage-stabilizing integrated
IC2 adopts 78L09 circuit of three-terminal voltage-stabilizing integrated.
4. a kind of constant temperature control circuit according to claim 1, it is characterised in that：The transistor type temperature sensor
V1 is connected respectively with resistor R1 with 3 feet of operational amplifier integrated circuit IC1 inside N1, and 4 feet of the N1 are connected with
Capacitor C3 is simultaneously grounded, and 2 feet of the N1 are connected with 1 foot；Operational amplifier integrated circuit IC1 adopts LM324
Type four high guaily unit integrated circuit, transistor type temperature sensor V1 selects MTS-102 transistor npn npn formula temperature sensors.
5. a kind of constant temperature control circuit according to claim 1, it is characterised in that：Operational amplifier integrated circuit IC1
5 feet of internal N2 are by 12 of the N4 inside potentiometer RP1 and resistor R4 and operational amplifier integrated circuit IC1
Foot connects, and 12 feet of the N4 are also associated with Zener diode VS and resistor R5,13 feet and 14 feet of the N4
Connection, 14 feet of the N4 are also associated with potentiometer RP2, RP3 and resistor R8.
6. a kind of constant temperature control circuit according to claim 1, it is characterised in that：Operational amplifier integrated circuit IC1
6 feet of internal N2 are connected to resistor R2 and R3, and the resistor R3 is also associated with 7 feet of N2, described
7 feet of N2 are also associated with voltmeter PV.
7. a kind of constant temperature control circuit according to claim 1, it is characterised in that：Operational amplifier integrated circuit IC1
9 feet of internal N3 are connected with resistor R6, resistor R7 are connected between 8 feet and 10 feet of the N3, while N3
10 feet be also associated with resistor R8.
8. a kind of constant temperature control circuit according to claim 1, it is characterised in that：Operational amplifier integrated circuit IC1
8 feet of internal N3 are connected in series with resistor R9 and transistor V2, and the emitter stage of the transistor V2 is connected with relay
K and work indication light diode VL2, the relay K are also connected in parallel to diode VD.
9. a kind of constant temperature control circuit according to claim 1, it is characterised in that：Described resistor R1, R4～R10
From metal film resistor or carbon film resistor；Resistor R2 and R3 are from the metal film resistor that precision is 1%；Current potential
Device RP1～RP3 selects small-sized synthesis membrane potentiometer；C1 and C2 are from the aluminium electrolutic capacitor that pressure voltage is 16V；
C3 is from monolithic capacitor or dacron terylene condenser；VD selects 1N4001 or 1N4007 type silicon rectifier diodes；VS is selected
With the silicon voltage regulator diode of 1W, 6V or so；VL1 and VL2 are selectedLight emitting diode, VL1 for redness,
VL2 is green；Rectifier bridge stacks of the UR from IA, 50Y, it is also possible to replace after 4 1N4001 bridge joints；V1 is selected
MTS-102 transistor npn npn formula temperature sensors；V2 selects 58050 type silicon PNP transistors；IC1 selects LM324 types
Four high guaily unit integrated circuit；IC2 selects 78L09 type circuit of three-terminal voltage-stabilizing integrated；K selects JRX-13F type 9V direct current relays
Device；Voltmeters of the PV from 1000mV；T is from 3～5W, the mains transformer that secondary voltage is 12Y；S is selected
The ac power switch of 5A, 220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675402.6A CN106598101A (en) | 2015-10-17 | 2015-10-17 | Constant-temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675402.6A CN106598101A (en) | 2015-10-17 | 2015-10-17 | Constant-temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106598101A true CN106598101A (en) | 2017-04-26 |
Family
ID=58554035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510675402.6A Pending CN106598101A (en) | 2015-10-17 | 2015-10-17 | Constant-temperature control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106598101A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272772A (en) * | 2017-08-03 | 2017-10-20 | 过成康 | A kind of low energy consumption, automatic constant temperature control circuit |
| CN107329508A (en) * | 2017-07-14 | 2017-11-07 | 过成康 | A kind of low energy consumption, high-precision automatic temperature control circuit |
| CN107357339A (en) * | 2017-08-18 | 2017-11-17 | 过成康 | A kind of automation temperature adjustment control circuit with multi-gear adjustment |
| CN107390748A (en) * | 2017-08-03 | 2017-11-24 | 过成康 | A kind of automatic constant temperature control circuit with self-protection function |
| CN107876927A (en) * | 2017-11-17 | 2018-04-06 | 江门市上庆自动化设备有限公司 | A kind of temperature control system of automatic tin welding machine |
-
2015
- 2015-10-17 CN CN201510675402.6A patent/CN106598101A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329508A (en) * | 2017-07-14 | 2017-11-07 | 过成康 | A kind of low energy consumption, high-precision automatic temperature control circuit |
| CN107272772A (en) * | 2017-08-03 | 2017-10-20 | 过成康 | A kind of low energy consumption, automatic constant temperature control circuit |
| CN107390748A (en) * | 2017-08-03 | 2017-11-24 | 过成康 | A kind of automatic constant temperature control circuit with self-protection function |
| CN107357339A (en) * | 2017-08-18 | 2017-11-17 | 过成康 | A kind of automation temperature adjustment control circuit with multi-gear adjustment |
| CN107876927A (en) * | 2017-11-17 | 2018-04-06 | 江门市上庆自动化设备有限公司 | A kind of temperature control system of automatic tin welding machine |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170426 |
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| WD01 | Invention patent application deemed withdrawn after publication |