CN202394140U - Time-base circuit temperature control timer - Google Patents
Time-base circuit temperature control timer Download PDFInfo
- Publication number
- CN202394140U CN202394140U CN2011205500388U CN201120550038U CN202394140U CN 202394140 U CN202394140 U CN 202394140U CN 2011205500388 U CN2011205500388 U CN 2011205500388U CN 201120550038 U CN201120550038 U CN 201120550038U CN 202394140 U CN202394140 U CN 202394140U
- Authority
- CN
- China
- Prior art keywords
- circuit
- temperature
- resistance
- pin
- alternating current
- 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
Links
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The utility model relates to a time-base circuit temperature control timer which comprises 220V alternating current, a resistance-capacitance voltage reduction and half-wave rectifier circuit, a 12V direct current voltage stabilizing circuit, a temperature sensing probe circuit, a timing circuit and a bidirectional thyristor trigger and heater control circuit. According to the time-base circuit temperature control timer, a 555 time-base circuit and a small number of peripheral elements and components are adopted to form an automatic temperature controller; a timing control circuit is also added for a temperature controller, so that an electric heating power supply can be cut off in time when a temperature sensing probe and the control circuit thereof lose control, and greater harm is avoided. The automatic temperature controller can be used for industrial production, rural electric heating control and the like. The time-base circuit temperature control timer can serve as an upgraded and updated device for the temperature control of a farmer indigenous brooding box.
Description
Technical field
The utility model belongs to electronic technology and temperature control technology field, relates to a kind of time base circuit temperature control timer.
Background technology
At present, rural area poultry hatching ubiquity hatch the temperature inside the box wayward, have that incubation rate is lower, variety of issue such as the cost height of brooding, labour intensity are bigger.Along with the rural electricity consumption problem generally is resolved, develop that a kind of circuit structure is simple, the device of reliable working performance, low preparation cost, automatic control heating-up temperature easy to install is necessary.The described time base circuit temperature control of the utility model timer can be widely used in work such as poultry hatches, edible fungus species cultivation, artificial breeding, and these work in the past that solved receive the influence of factors such as environment temperature, artificial treatment.
The utility model adopts 555 time-base integrated circuits and a small amount of peripheral component to form an Automatic Temperature Control, and this temperature controller also possesses timing function.Just can work reliably with the electric capacity voltage drop method, the circuit component price is low, volume is little, the convenient making.This Automatic Temperature Control can be used for work such as commercial production and rural area electrical heating control.
Below describe the correlation technique content of this time base circuit temperature control timer in implementation process in detail.
The utility model content
Goal of the invention and beneficial effect: time base circuit temperature control timer adopts 555 time base circuits and a small amount of peripheral component to form an Automatic Temperature Control; This controller has also increased timing control circuit; Can effectively prevent when temperature-sensing probe and control circuit thereof are out of control; Can in time cut off the electrical heating power supply, avoid causing bigger harm.This Automatic Temperature Control can be used for work such as commercial production and rural area electrical heating control.The utility model both can be used as the temperature controlled upgrading of peasant household's local method Brooding cases, replacement device.
Circuit working principle: when environment temperature is low; Temperature-sensing probe Rt resistance is big (negative temperature coefficient); The 2 pin voltages of 555 time base circuit IC1 are lower than the 3 pin output high level of 1/3,555 time base circuit IC1 of 12V D.C. regulated power supply voltage, trigger bidirectional thyristor VT conducting; Make electric heater RL connect the 220V alternating current and heat, and the circulation that picks up counting.When temperature-sensing probe Rt place temperature to be higher than setting value and timing circulation also imperfect tense, finishing post-heater RL at timing cycle will be cut off.When thermistor Rt temperature is reduced to setting value when following, can trigger bidirectional thyristor VT conducting once more, connect electric heater RL and heat, reach the temperature purpose of control automatically.
Technical characterictic: time base circuit temperature control timer, comprise that 220V alternating current, resistance-capacitance depressurization and half-wave rectifying circuit, 12V direct current regulation circuit, temperature-sensing probe circuit, timing circuit, bidirectional thyristor trigger and control circuit for heater, its characteristic comprises:
Temperature-sensing probe circuit: form by temperature-sensing probe Rt, potentiometer RP, resistance R 4; The anodal VCC of the end of potentiometer RP and lever arm connection circuit thereof; The end of another termination temperature-sensing probe Rt of potentiometer RP; 2 pin of another termination 555 time base circuit IC1 of temperature-sensing probe Rt and an end of resistance R 4, the zero line side N of another termination 220V alternating current of resistance R 4;
Timing circuit: the end of 5 pin of 555 time base circuit IC1 and 7 pin connecting resistance R2 and the positive pole of electrochemical capacitor C3; The anodal VCC of 4 pin of the other end of resistance R 2 and 555 time base circuit IC1 and 8 pin connection circuits, 1 pin of the negative pole of electrochemical capacitor C3 and 555 time base circuit IC1 meets the zero line side N of 220V alternating current;
Bidirectional thyristor triggers and control circuit for heater: 3 pin that meet 555 time base circuit IC1 behind the control utmost point G series resistor R3 of bidirectional thyristor VT; The second anode T2 of bidirectional thyristor VT meets the zero line side N of 220V alternating current; The first anode T1 of bidirectional thyristor VT connects the end of well heater RL, and the other end of well heater RL links to each other with the live wire end L of 220V alternating current;
Resistance-capacitance depressurization and half-wave rectifying circuit: the end of the anodal connecting resistance R1 of commutation diode D1 and an end of capacitor C 1, the other end of the other end of resistance R 1 and capacitor C 1 links to each other with the live wire end L of 220V alternating current;
The 12V direct current regulation circuit: the positive pole of the negative pole of voltage stabilizing diode DW and electrochemical capacitor C2 connects the negative pole of commutation diode D1; The negative pole of commutation diode D1 links to each other with circuit anode VCC, and the negative pole of the positive pole of voltage stabilizing diode DW and electrochemical capacitor C2 meets the zero line side N of 220V alternating current.
Description of drawings
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a time base circuit temperature control timer.
Embodiment
According to shown in the accompanying drawing 1 with the circuit working schematic diagram of time base circuit temperature control timer and the components and parts technical requirement of description of drawings and the following stated, implement to realize the utility model in conjunction with following examples.
The selection of components and parts and technical parameter thereof
IC1 is 555 time base circuits, and model is NE555; Time base circuit IC1 is 8 pin DIP encapsulation; Each pin function: 1 pin is a dc power cathode, and 2 pin are trigger end, and 3 pin are output terminal, and 4 pin are reset terminal, and 5 pin are control voltage, and 6 pin are thresholding (threshold value), and 7 pin are discharge end, and 8 pin are dc power anode;
Present embodiment adopts the MF12 type or the MF53 type thermistor of negative temperature coefficient, typical resistance 25K Ω.When temperature was low, the thermistor Rt resistance of negative temperature coefficient was bigger.Also can select different resistance negative tempperature coefficient thermistors, in the temperature range of needs control, as long as satisfy experimental formula: Rt+RP=2R4; Bidirectional thyristor VT can select according to the size of heating element RL electric current.
Components and parts title and major parameter
| The element code name | The components and parts title | Technical parameter | Quantity | Explanation |
| VT | Bidirectional thyristor | BT136 or BCR3AM | 1 | |
| D1 | 1N4007 | Plastic packaging, 1A/1000V | 1 | Commutation diode |
| DW | Voltage stabilizing diode | 12V、1W | 1 | Or select 2CW71 |
| Rt | The thermistor of negative temperature coefficient | MF12 type or MF53 type | 1 | Temperature-sensing probe |
| RP | Potentiometer | 2KΩ | 1 | The band scale |
| R1 | Resistance | 1/2W、510KΩ | 1 | Current-limiting resistance |
| R2 | Resistance | 1/8W、510KΩ | 1 | Metalfilmresistor |
| R3 | Resistance | 1/8W、200Ω | 1 | Metalfilmresistor |
| R4 | Resistance | 1/8W、15KΩ | 1 | Metalfilmresistor |
| C1 | Electric capacity | 0.47μF/400V | 1 | Electric capacity of the dacron |
| C2 | Electrochemical capacitor | Capacity 470 μ F/25V | 1 | |
| C3 | Electrochemical capacitor | Capacity 220 μ F/25V | 1 | |
| RL | Well heater | Peak power: 150W | 1 | PTC or electric furnace heating wire |
Circuit production and circuit debugging
The temperature control timer circuit can be installed on the circuit board; Generally do not need debugging, timing is spaced apart 1.1R2 * C3, should select smallerly than the thermal time constant of heating system; But can not be too little, otherwise might because of bidirectional thyristor VT rapidly conducting or by and cause interference.Some can obtain bigger temperature regulating range to potentiometer RP value greatly, but temperature controlled sensitivity meeting descends to some extent.
The circuit of temperature control timer is packed in the small plastic box, and temperature-sensing probe Rt is guided to temperature measurement location with lead get final product.This temperature control timer is applicable to that individuality is engaged in work such as poultry hatching, artificial breeding, bacterial classification cultivation, 25 ℃～45 ℃ of temperature controlling range, and accuracy of temperature control is ± 0.4 ℃.
Claims (1)
1. a time base circuit temperature control timer comprises that 220V alternating current, resistance-capacitance depressurization and half-wave rectifying circuit, 12V direct current regulation circuit, temperature-sensing probe circuit, timing circuit, bidirectional thyristor trigger and control circuit for heater, and its characteristic comprises:
The temperature-sensing probe circuit is made up of temperature-sensing probe Rt, potentiometer RP, resistance R 4; The anodal VCC of the end of potentiometer RP and lever arm connection circuit thereof; The end of another termination temperature-sensing probe Rt of potentiometer RP; 2 pin of another termination 555 time base circuit IC1 of temperature-sensing probe Rt and an end of resistance R 4, the zero line side N of another termination 220V alternating current of resistance R 4;
The end of 5 pin of 555 time base circuit IC1 and 7 pin connecting resistance R2 and the positive pole of electrochemical capacitor C3 in the timing circuit; The anodal VCC of 4 pin of the other end of resistance R 2 and 555 time base circuit IC1 and 8 pin connection circuits, 1 pin of the negative pole of electrochemical capacitor C3 and 555 time base circuit IC1 meets the zero line side N of 220V alternating current;
Connect 3 pin of 555 time base circuit IC1 in bidirectional thyristor triggering and the control circuit for heater behind the control utmost point G series resistor R3 of bidirectional thyristor VT; The second anode T2 of bidirectional thyristor VT meets the zero line side N of 220V alternating current; The first anode T1 of bidirectional thyristor VT connects the end of well heater RL, and the other end of well heater RL links to each other with the live wire end L of 220V alternating current;
An end of the end of the anodal connecting resistance R1 of commutation diode D1 and capacitor C 1 in resistance-capacitance depressurization and the half-wave rectifying circuit, the other end of the other end of resistance R 1 and capacitor C 1 links to each other with the live wire end L of 220V alternating current;
The negative pole of voltage stabilizing diode DW in the 12V direct current regulation circuit and the positive pole of electrochemical capacitor C2 connect the negative pole of commutation diode D1; The negative pole of commutation diode D1 links to each other with circuit anode VCC, and the negative pole of the positive pole of voltage stabilizing diode DW and electrochemical capacitor C2 meets the zero line side N of 220V alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205500388U CN202394140U (en) | 2011-12-25 | 2011-12-25 | Time-base circuit temperature control timer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205500388U CN202394140U (en) | 2011-12-25 | 2011-12-25 | Time-base circuit temperature control timer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202394140U true CN202394140U (en) | 2012-08-22 |
Family
ID=46669051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205500388U Expired - Fee Related CN202394140U (en) | 2011-12-25 | 2011-12-25 | Time-base circuit temperature control timer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202394140U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411385A (en) * | 2011-12-25 | 2012-04-11 | 魏传永 | Time-based circuit temperature control timer |
-
2011
- 2011-12-25 CN CN2011205500388U patent/CN202394140U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411385A (en) * | 2011-12-25 | 2012-04-11 | 魏传永 | Time-based circuit temperature control timer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102183980A (en) | Temperature control timer prepared from time-base circuit | |
| CN202067162U (en) | Temperature control timer made from time base circuit | |
| CN202720527U (en) | Constant temperature controller circuit | |
| CN203597240U (en) | Special geothermal water-saving system for culturing tropical fishes | |
| CN205563313U (en) | Thermistor automatic control temperature control circuit based on 555 timer | |
| CN202394140U (en) | Time-base circuit temperature control timer | |
| CN102411385A (en) | Time-based circuit temperature control timer | |
| CN104834335A (en) | Thermostatic control circuit for fowl egg hatching | |
| CN102411383A (en) | Thermostat controller manufactured by 555 time-base circuit | |
| CN203502862U (en) | Constant temperature controller for culturing farm | |
| CN203207828U (en) | Temperature adjustable electric cooker | |
| CN202995495U (en) | Temperature controller | |
| CN201837907U (en) | Multi-purpose controller for incubator | |
| CN101887278A (en) | Multipurpose thermostat controller | |
| CN102595745A (en) | Automatic supplementary illumination controller for chicken farm | |
| CN209017861U (en) | A kind of dryer | |
| CN204856250U (en) | Simple and easy temperature -control circuit | |
| CN202257317U (en) | Thermostat controller manufactured by using 555 time-base circuit | |
| CN105425855A (en) | Temperature-adjustable electric heating foot warming plate | |
| CN207948546U (en) | A kind of herding livestock automatic water drinking device | |
| CN205848312U (en) | A kind of Intelligent heating and the domestic animal tank of water supply | |
| CN102591380A (en) | Agricultural dual-limit temperature controller | |
| CN202394138U (en) | Controller for agricultural incubator | |
| CN208095594U (en) | A kind of livestock-raising canopy | |
| CN207100196U (en) | Fish jar heater |
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: 20120822 Termination date: 20121225 |