CN203366158U - Temperature control circuit - Google Patents
Temperature control circuit Download PDFInfo
- Publication number
- CN203366158U CN203366158U CN 201320096571 CN201320096571U CN203366158U CN 203366158 U CN203366158 U CN 203366158U CN 201320096571 CN201320096571 CN 201320096571 CN 201320096571 U CN201320096571 U CN 201320096571U CN 203366158 U CN203366158 U CN 203366158U
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- China
- Prior art keywords
- resistance
- capacitor
- temperature
- circuit
- dressing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an adjustable temperature control circuit, which aims at realizing required stepless temperature regulation and control for a pill/tablet dressing machine. The temperature control circuit has the principles that when the circuit is electrified, temperature of a dressing-pan heater BY is relatively low, resistance of a thermistor RT is relatively high, potential of a capacitor C5 is relatively high, a unijunction transistor V2 oscillates in advance to make a conduction angle of a bidirectional silicon controlled rectifier V3 move forwards, and current passing through the dressing-pan heater BY correspondingly increases so that the dressing-pan heater BY reaches a set temperature value as soon as possible; and when the dressing-pan heater BY reaches the set temperature value, the resistance of the thermistor RT decreases, the current passing through the dressing-pan heater BY decreases, and the temperature gradually decreases; and thus, the goal of automatic control for constant temperature is achieved. The temperature control circuit is simple in structure, can effectively control the quality of dressed products, is smooth in the regulation process, and can prolong service life of electric-appliance elements.
Description
Technical field
The utility model relates to a kind of adjustable temperature control circuit, and this circuit can be realized temperature required stepless regulated of pill, tablet seed-coating machine.
Background technology
At present, seed-coating machine common in prior art mostly is constant or manual fine-tuning to the Temperature Setting in the dressing process, and the temperature control scope is generally at 140-60 ℃.It is feasible that general pill and tablet carry out dressing in this temperature range, but for the medicament that contains heat-sensitive substance, the temperature control scope of above-mentioned routine can cause volatility, a large amount of losses of thermal sensitivity composition in medicament, and then the finished medicament quality is impacted.
The utility model content
Defect for seed-coating machine temperature control difficulty in prior art, the utility model provides a kind of automatic control circuit that can step-less adjustment seed-coating machine temperature, and break through the temperature control scope of seed-coating machine routine, the loss of volatilization and heat-sensitive substance in the reduction medicament, all even component content is accurate to guarantee outward appearance, and then guarantees that finished medicament reaches quality index.
Principle of the present utility model is: the commutation diode V that model is identical
d1, V
d2, V
d3, V
d4the common bridge rectifier circuit V that forms
d, capacitor C
2with stabilivolt V
d5give triode V after filtering voltage regulation
1the working power of 18V is provided.Pass through again capacitor C
4filtering, stabilivolt V
d6after voltage stabilizing, for whole temperature-adjusting circuit provides the operating voltage of 15V.Unijunction transistor V
2with potentiometer RP
1, resistance R
4, potentiometer R
p2, resistance R
5forming an oscillator of speeding, is bidirectional triode thyristor V
3the control trigger pulse.Thermistor R
tfor thermometric.During just energising, coating pan heating arrangement BY temperature is lower, thermistor R
tresistance is larger, capacitor C
5current potential is higher, charging rate diminishes, unijunction transistor V
2vibration in advance makes bidirectional triode thyristor V
3the conduction angle reach, flow through the corresponding increase of electric current of coating pan heating arrangement BY, makes it reach as early as possible the predetermined temperature setting value.When the temperature of coating pan heating arrangement BY reaches desired temperature, thermistor R
tresistance diminishes, and the electric current that flows through coating pan electric heater unit BY diminishes, and temperature reduces gradually, thereby reaches the control purpose of automatic constant-temperature.This circuit is controlled the size of SCR Trigger Angle by trigger circuit, regulate and control the controlled silicon conducting degree.Conduction angle small thyristor conducting just few, just many voltage with crossing of the large conducting of conduction angle is just large.Whole temperature adjusting process is level and smooth, the purpose of accomplishing stepless temperature regulating.
Particular content of the present utility model is: an end of K switch is connected with the end of insurance BX, the other end and the resistance R of insurance BX
1and capacitor C
1one end of the parallel circuit formed and the end of coating pan heating arrangement BY are connected in parallel, resistance R
1and capacitor C
1the other end access bridge rectifier circuit V of the parallel circuit formed
dan input end; Bridge rectifier circuit V
din the two ends adjacent with this input end be output terminal, wherein an output head anode and capacitor C
2positive pole, triode V
1collector connect, another output terminal and capacitor C
2negative pole, capacitor C
3negative pole, stabilivolt V
d5anode, capacitor C
4negative pole, stabilivolt V
d6anode, thermistor R
tan end, capacitor C
5an end and the not dotted end of pulse transformer B be connected in parallel; Capacitor C
3positive pole and stabilivolt V
d5negative electrode, resistance R
2an end and triode V
1base stage link together; Capacitor C
4positive pole and resistance R
2the other end, triode V
1emitter, resistance R
3an end, resistance R
7an end be connected in parallel; Resistance R
3the other end and stabilivolt V
d6negative electrode, potentiometer R
p1an end, resistance R
5an end be connected; Potentiometer R
p1the other end and resistance R
4series connection, resistance R
7the other end and potentiometer R
p2series connection; Resistance R
4the other end and thermistor R
tthe other end, diode V
d7positive pole be connected; Potentiometer R
p2the other end and unijunction transistor V
2penetrate the level, diode V
d7negative electrode, capacitor C
5the other end be connected; Unijunction transistor V
2the first base stage with the dotted end of pulse transformer B, be connected, unijunction transistor V
2the second base stage and resistance R
5the other end be connected; Bridge rectifier circuit V
din another input end except the other end with K switch is whole circuit access 220V voltage jointly, also and resistance R
6, bidirectional triode thyristor V
3the control utmost point be linked in sequence; Resistance R
6the other end and not dotted end, the bidirectional triode thyristor V of pulse transformer B
3the control utmost point be linked in sequence; Bidirectional triode thyristor V
3the control utmost point with the dotted end of pulse transformer B, be connected, bidirectional triode thyristor V
3the other end with the other end of coating pan heating arrangement BY, be connected.
Further, thermistor R
tselect linearity best results during copper resistance preferably.
The utility model circuit structure is simple, can effectively control the quality of coated product, and adjustment process is level and smooth, can extend the electric elements life-span.
The accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with Figure of description, the utility model is described:
The mechanism of this circuit comprises: the insurance BX that current capacity is 10A (ampere); Current capacity is 15A to 20A (ampere), the K switch of withstand voltage 600V; Capacitor C
1, capacitor C
2, capacitor C
3, capacitor C
4, capacitor C
5, capacitor C wherein
1be the polarity free capacitor of the withstand voltage 600V (volt) of 2 μ F (microfarad), capacitor C
2and capacitor C
3be respectively the electrochemical capacitor of 2 μ F (microfarad) and 100 μ F (microfarad) and the withstand voltage 600V of being (volt), capacitor C
4be the electrochemical capacitor of 100 μ F (microfarad) and withstand voltage 250V (volt), capacitor C
5it is the polarity free capacitor of 0.1～1 μ F (microfarad) and withstand voltage 250V (volt); Specification be 2W (watt) and 2W is above, the cement resistor R of 1M Ω (megaohm)
1, specification be 0.5W (watt), 1K Ω (kilo-ohm) resistance R
2, specification be 0.5W (watt), the resistance R of 510 Ω (Europe)
3, specification be 0.5W (watt), the resistance R of 100 Ω (Europe)
4, specification be 0.5W (watt), the resistance R of 470 Ω (Europe)
5, specification be 0.5W (watt), the resistance R of 20 Ω (Europe)
6, specification be 0.5W (watt), 150K Ω (kilo-ohm) resistance R
7; Bridge rectifier circuit V
dby V
d1, V
d2, V
d3, V
d4four models are the rectification circuit of the commutation diode composition of 1N4007; Stabilivolt V
d5can select the stabilivolt that model is 1N4112, voltage stabilizing value 18V; Stabilivolt V
d6can select model is 1N4744 or 1N4109 stabilivolt, voltage stabilizing value 15V; Diode V
d7selecting model is 1N4001; Triode V
1selecting model is 9013; Unijunction transistor V
2selecting model is BT33; Bidirectional triode thyristor V
3selecting model is BTA26,26A; Potentiometer R
p1selecting model is WXD3-13 or WXD3-43 (10 circles are monotroded, axle sleeve or pressing plate, Φ 25,2W, 100 Ω～1000K Ω); Potentiometer R
p2selecting model is WS16-4 (common individual pen, support are horizontal, 0.5W, Φ 17, Standard resistance range 100 Ω～2.2M Ω); Thermistor R
tselecting model is UC50 (negative temperature coefficient, capacity are 50 Ω); Pulse transformer B selects peakflux density 2000～6000G (Gauss), and Same Name of Ends connects; Coating pan heating arrangement BY, can select suitable dressing heating arrangement according to the needs of producing different preparations.
The connected mode of this temperature-adjusting circuit is: an end of K switch is connected with the end of insurance BX, the other end and the resistance R of insurance BX
1and capacitor C
1one end of the parallel circuit formed and the end of dressing heating arrangement BY are connected in parallel, resistance R
1and capacitor C
1the other end access bridge rectifier circuit V of the parallel circuit formed
dan input end; Bridge rectifier circuit V
din the two ends adjacent with this input end be output terminal, wherein an output head anode and capacitor C
2positive pole, triode V
1collector connect, another output terminal and capacitor C
2negative pole, capacitor C
3negative pole, stabilivolt V
d5anode, capacitor C
4negative pole, stabilivolt V
d6anode, thermistor R
tan end, capacitor C
5an end and the not dotted end of pulse transformer B be connected in parallel; Capacitor C
3positive pole and stabilivolt V
d5negative electrode, resistance R
2an end and triode V
1base stage link together; Capacitor C
4positive pole and resistance R
2the other end, triode V
1emitter, resistance R
3an end, resistance R
7an end be connected in parallel; Resistance R
3the other end and stabilivolt V
d6negative electrode, potentiometer R
p1an end, resistance R
5an end be connected; Potentiometer R
p1the other end and resistance R
4series connection, resistance R
7the other end and potentiometer R
p2series connection; Resistance R
4the other end and thermistor R
tthe other end, diode V
d7positive pole be connected; Potentiometer R
p2the other end and unijunction transistor V
2penetrate the level, diode V
d7negative electrode, capacitor C
5the other end be connected; Unijunction transistor V
2the first base stage with the dotted end of pulse transformer B, be connected, unijunction transistor V
2the second base stage and resistance R
5the other end be connected; Bridge rectifier circuit V
din another input end except the other end with K switch is whole circuit access 220V voltage jointly, also and resistance R
6, bidirectional triode thyristor V
3the control utmost point be linked in sequence; Resistance R
6the other end and not dotted end, the bidirectional triode thyristor V of pulse transformer B
3the control utmost point be linked in sequence; Bidirectional triode thyristor V
3the control utmost point with the dotted end of pulse transformer B, be connected, bidirectional triode thyristor V
3the other end with the other end of coating pan heating arrangement BY, be connected.
The working power of 18V is provided to after capacitor C 2 and stabilivolt VD5 filtering voltage regulation triode V1.Pass through again capacitor C 4 filtering, after stabilivolt VD6 voltage stabilizing, for whole temperature-adjusting circuit provides the operating voltage of 15V.Unijunction transistor V2 and potentiometer RP1, resistance R 4, potentiometer RP2, resistance R 5 form an oscillator of speeding, and are the control trigger pulse of bidirectional triode thyristor V3.Thermistor RT is for thermometric, when selecting the linearity better effects if during copper resistance line preferably.During just energising, coating pan heating arrangement BY temperature is lower, thermistor RT resistance is larger, capacitor C 5 current potentials are higher, charging rate diminishes, unijunction transistor V2 vibrates in advance and makes the reach of bidirectional triode thyristor V3 conduction angle, flow through the corresponding increase of electric current of coating pan electric calorifie installation BY, make it reach as early as possible the predetermined temperature setting value.When the temperature of coating pan electric calorifie installation BY reaches desired temperature, thermistor RT resistance diminishes, and the electric current that flows through coating pan electric calorifie installation BY diminishes, and temperature reduces gradually, thereby reaches the control purpose of automatic constant-temperature.This circuit is controlled the size of SCR Trigger Angle by trigger circuit, regulate and control the controlled silicon conducting degree.Conduction angle small thyristor conducting just few, just many voltage with crossing of the large conducting of conduction angle is just large.Whole temperature adjusting process is level and smooth, the purpose of accomplishing stepless temperature regulating.
Claims (3)
1. a coating pan heated for controlling temperature circuit is characterized in that: an end of K switch connect with the end of insurance BX, insures the other end and the resistance R of BX
1and capacitor C
1one end of the parallel circuit formed and the end of coating pan heating arrangement BY are connected in parallel, resistance R
1and capacitor C
1the other end access bridge rectifier circuit V of the parallel circuit formed
dan input end; Bridge rectifier circuit V
din the two ends adjacent with this input end be output terminal, wherein an output head anode and capacitor C
2positive pole, triode V
1collector connect, another output terminal and capacitor C
2negative pole, capacitor C
3negative pole, stabilivolt V
d5anode, capacitor C
4negative pole, stabilivolt V
d6anode, thermistor R
tan end, capacitor C
5an end and the not dotted end of pulse transformer B be connected in parallel; Capacitor C
3positive pole and stabilivolt V
d5negative electrode, resistance R
2an end and triode V
1base stage link together; Capacitor C
4positive pole and resistance R
2the other end, triode V
1emitter, resistance R
3an end, resistance R
7an end be connected in parallel; Resistance R
3the other end and stabilivolt V
d6negative electrode, potentiometer R
p1an end, resistance R
5an end be connected; Potentiometer R
p1the other end and resistance R
4series connection, resistance R
7the other end and potentiometer R
p2series connection; Resistance R
4the other end and thermistor R
tthe other end, diode V
d7positive pole be connected; Potentiometer R
p2the other end and unijunction transistor V
2penetrate the level, diode V
d7negative electrode, capacitor C
5the other end be connected; Unijunction transistor V
2the first base stage with the dotted end of pulse transformer B, be connected, unijunction transistor V
2the second base stage and resistance R
5the other end be connected; Bridge rectifier circuit V
din another input end except the other end with K switch is whole circuit access 220V voltage jointly, also and resistance R
6, bidirectional triode thyristor V
3the control utmost point be linked in sequence; Resistance R
6the other end and not dotted end, the bidirectional triode thyristor V of pulse transformer B
3the control utmost point be linked in sequence; Bidirectional triode thyristor V
3the control utmost point with the dotted end of pulse transformer B, be connected, bidirectional triode thyristor V
3the other end with the other end of coating pan heating arrangement BY, be connected.
2. temperature-adjusting circuit as claimed in claim 1, is characterized in that thermistor R
tfor copper resistance.
3. temperature-adjusting circuit as claimed in claim 1 or 2, is characterized in that: bridge rectifier circuit V
dthe commutation diode that is 1N4007 by four models forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320096571 CN203366158U (en) | 2013-02-25 | 2013-02-25 | Temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320096571 CN203366158U (en) | 2013-02-25 | 2013-02-25 | Temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203366158U true CN203366158U (en) | 2013-12-25 |
Family
ID=49813900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320096571 Expired - Fee Related CN203366158U (en) | 2013-02-25 | 2013-02-25 | Temperature control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203366158U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106228788A (en) * | 2016-08-31 | 2016-12-14 | 张志军 | A kind of input equipment for multimedia teaching |
-
2013
- 2013-02-25 CN CN 201320096571 patent/CN203366158U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106228788A (en) * | 2016-08-31 | 2016-12-14 | 张志军 | A kind of input equipment for multimedia teaching |
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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: 20131225 Termination date: 20180225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |