CN101887278A

CN101887278A - Multipurpose thermostat controller

Info

Publication number: CN101887278A
Application number: CN 201010157767
Authority: CN
Inventors: 周玉林
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-28
Filing date: 2010-04-28
Publication date: 2010-11-17

Abstract

At present, peasants always use a simple method to provide a heat source for poultry hatch or strains cultivation and the like in countryside, which commonly has the problems of not easy control of temperature in a thermostat, low rate of breed, high production cost and the like. A multipurpose thermostat controller provided in the invention has the advantages of convenient use and installation, simple circuit structure, reliable working property, low manufacture cost and the like, is suitable for works of peasants in poultry hatch, edible mushroom strain cultivation, artificial breeding and the like, is free from the influences of factors of environmental temperature, temperature control, manual care, fireproof safety and the like on the traditional works, and greatly improves the rate of breed. The temperature control range of the thermostat is 15-45 DEG C, and the constant temperature precision reaches +/-0.5 DEG C. The technology of the invention can be used for developing as a single product, used as an updating and upgrading device controlling the temperature of a breeding box made by a peasant locally, and also used as a configuration combination of the breeding box to be matched and developed in the breeding box.

Description

Multipurpose thermostat controller

Technical field

The invention belongs to the electron controls technology field, relate to a kind of multipurpose thermostat controller, it is applicable to work such as rural area poultry hatching, edible fungus species cultivation, artificial breeding.

Background technology

At present, the rural area poultry hatching still has peasant household using band lampshade kerosene lamp as thermal source, and what condition was good uses common electric blanket instead as heating arrangement.There are lower, the outstanding problems such as cost height, labour intensity are big, fire prevention hidden danger of brooding of incubation rate in non-uniform temperature, wayward in their ubiquity incubators.Therefore, along with the rural electricity consumption problem generally is resolved, be necessary to develop a kind of easy to install, circuit structure simple, the controller of reliable working performance, incubator electronics A.T.C that cost of manufacture is cheap.Thermostat controller can be widely used in particular job such as poultry hatches, edible fungus species cultivation, artificial breeding, and these work in the past that can solve are subjected to the influence of factors such as environment temperature, temperature control, artificial treatment.

Below describe a kind of correlation technique content of multipurpose thermostat controller in detail.

Summary of the invention

Goal of the invention and beneficial effect: multipurpose thermostat controller is applicable to that peasant household's individuality is engaged in work such as poultry hatching, artificial breeding, bacterial classification cultivation.The Thermostat Temperature Control scope is 15 ℃～45 ℃, the constant temperature precision reaches ± and 0.5 ℃.

Technology of the present invention both can be used as independent product and had developed, and as upgrading, the replacement device of peasant household's local method Brooding cases control temperature, the configuration that also can be used as incubator is combined to carries out supporting exploitation in the case.

Circuit is formed: the 12V pulsation stabilized voltage supply of multipurpose thermostat controller is by dropping resistor R1, and silicon rectifier diode D2 rectification and voltage stabilizing diode D1 form.The Zhang Zhen that speeds swings circuit and is made of resistance R 2, R3, potentiometer RP, thermistor RT, capacitor C 1 and unijunction transistor BG1.Load circuit and heated condition indicating circuit are made up of DC current Table A, heating element RL and light emitting diode D5, resistance R 5.

Principle of work: when constant temperature the temperature inside the box is lower than setting value, the resistance of thermal resistor RT is less, forming the Zhang Zhen that speeds by unijunction transistor BG1, to swing the phasing degree of the pulse voltage that circuit produces less, this pulse is also less by the pilot angle that isolating transformer BT triggers one-way SCR VT, so the higher DC voltage of controllable silicon output is powered to heating element RL, constant temperature the temperature inside the box rises rapidly.Along with the rising of the temperature inside the box, thermistor RT heated resistance increases gradually, and the pilot angle of VT increases thereupon, and the RL heating power reduces gradually.When the temperature inside the box closed on preset temperature, the RT resistance was step evolution and increases, and the heating power of RL reduces to enter keeping warm mode because of what VT kept electric current.The resistance of regulator potentiometer RP can be set needed temperature in the constant temperature oven.

Description of drawings

Accompanying drawing is a multipurpose thermostat controller circuit working schematic diagram.

Temperature-sensing probe RT in the accompanying drawing is the linear PTC thermal resistor; The components and parts ground connection of mentioning among the figure is the N end of the zero line of finger civil power.

Embodiment

Accompanying drawing and description of drawings to specifications are further described correlation technique of the present invention with the following Examples below.

Multipurpose thermostat controller is made up of following several partial circuits:

The 12V pulsation stabilized voltage supply (need not filtering) of multipurpose thermostat controller is by dropping resistor R1, and silicon rectifier diode D2 rectification and voltage stabilizing diode D1 form.The Zhang Zhen that speeds swings circuit and is made of R2, R3, RP, thermistor RT, C1 and unijunction transistor BG1.Load circuit and heated condition indicating circuit are made up of DC current Table A, heating element RL and light emitting diode D5, resistance R 5.

Annexation in the multipurpose thermostat controller circuit between components and parts:

1.12V the pulsation stabilized voltage supply is by dropping resistor R1, silicon rectifier diode D2 and voltage stabilizing diode D1 form.One end of resistance R 1 connects the L end of civil power live wire by power switch SW, the positive pole of another termination D2 of R1, positive pole of stabilized voltage supply output terminal (VCC) by D2 with constitute the plus earth of D1 (that is: the N that connects the civil power zero line holds) after the negative pole of D1 links to each other.

2. the Zhang Zhen that speeds swings circuit and is made of resistance R 2, potentiometer RP, thermistor RT, capacitor C 1, resistance R 3 and unijunction transistor BG1.The end of RP meets VCC by resistance R 2, the lever arm of RP and the other end of RP connect the end of RT respectively, the end of the other end difference C1 of RT and the E pin of BG1, the other end ground connection of C1, the B2 pin of BG1 meets VCC by resistance R 3, the B1 pin of BG1 connects the negative pole of elementary end of isolating transformer BT and D3, the other end ground connection that the positive pole of D3 and BT are elementary respectively.

3. thyristor gating circuit is made up of the secondary of isolating transformer BT and silicon rectifier diode D4.The positive pole of the secondary termination D4 of isolating transformer BT, the negative pole order of D4 be to the control utmost point of controllable silicon VT, the negative electrode of another termination VT of BT level and the anode of DC current Table A.

4. load circuit and heated condition indicating circuit are made up of DC current Table A, heating element RL and light emitting diode D5, resistance R 5.The anode order of DC current Table A is to the negative electrode of controllable silicon VT, and the negative terminal of reometer A connects the end of heating element RL and an end of resistance R 5 respectively, positive pole, the other end of RL and the minus earth of D5 of the other end sending and receiving light diode D5 of R5.

The selection of components and parts:

The components and parts of constant temperature control circuit are selected and technical parameter, and 150W is an example with load (heating element) RL power.

The temperature-sensing probe RT that the thermostat controller circuit is used selects the linear PTC thermistor for use, and the resistance in the time of 15 ℃ is about: 500 Ω ± 2%; 15 ℃～45 ℃ whens test, nonlinearity erron: ± 0.3%, temperature-coefficient of electrical resistance is 2.10%/℃, thermal time constant is less than 30S.Potentiometer RP requires the select tape latch mechanism.If the space in the constant temperature oven allows, the power of the resistance in the circuit can all be selected the 1W metalfilmresistor.

Components and parts title and major parameter

The element code name	The components and parts title	Technical parameter	Quantity	Explanation
The element code name	The components and parts title	Technical parameter	Quantity	Explanation	??BG1	Unijunction transistor	??BT33F	1
??VT	One-way SCR	??3CT3A	1		??BG1	Unijunction transistor	??BT33F	1
??VT	One-way SCR	??3CT3A	1		??D1	Voltage stabilizing diode	??1W、12V	1

The element code name	The components and parts title	Technical parameter	Quantity	Explanation
The element code name	The components and parts title	Technical parameter	Quantity	Explanation	??D2	??1N4007	Plastic packaging, 1A/1000V	1
??D3、D4	1N4001 (silicon rectifier diode)	Plastic packaging, 1A/50V	2		??D2	??1N4007	Plastic packaging, 1A/1000V	1
??D3、D4	1N4001 (silicon rectifier diode)	Plastic packaging, 1A/50V	2		??D5	Red light emitting diodes	??Φ5、LED	1	The heated condition indication
??RT	The linear PTC thermistor	Resistance is about: 500 Ω	1	Temperature-sensing probe	??D5	Red light emitting diodes	??Φ5、LED	1	The heated condition indication
??RT	The linear PTC thermistor	Resistance is about: 500 Ω	1	Temperature-sensing probe	??BT	Isolating transformer	Iron core power 1W, 5V	1	Coil turn 1: 1
??RP	Potentiometer	WW POT, 270 Ω	1	Tight mechanism with lock	??BT	Isolating transformer	Iron core power 1W, 5V	1	Coil turn 1: 1
??RP	Potentiometer	WW POT, 270 Ω	1	Tight mechanism with lock	??R1、R5	Resistance	??1/2W、10KΩ	2	Current-limiting resistance
??R2	Resistance	??1/8W、2KΩ	1	Metalfilmresistor	??R1、R5	Resistance	??1/2W、10KΩ	2	Current-limiting resistance
??R2	Resistance	??1/8W、2KΩ	1	Metalfilmresistor	??R3	Resistance	??1/8W、430Ω	1	Metalfilmresistor
??R4	Resistance	??1/4W、51Ω	1	Metalfilmresistor	??R3	Resistance	??1/8W、430Ω	1	Metalfilmresistor
??R4	Resistance	??1/4W、51Ω	1	Metalfilmresistor	??C1	Electric capacity	??0.47μF/400V	1	Electric capacity of the dacron
??C2	Electric capacity	Electric capacity of the dacron 0.1 μ F	1		??C1	Electric capacity	??0.47μF/400V	1	Electric capacity of the dacron
??C2	Electric capacity	Electric capacity of the dacron 0.1 μ F	1		??RL	Heating element	Peak power: 150W	1	Electric furnace heating wire or PTC
??A	The pointer direct current reometer	Range 1～2A	1		??RL	Heating element	Peak power: 150W	1	Electric furnace heating wire or PTC
??A	The pointer direct current reometer	Range 1～2A	1		Terminal	Connect AC power	Terminal meets 220V	1 group	Solderable
??SW	Regular tap		1		Terminal	Connect AC power	Terminal meets 220V	1 group	Solderable

Make and circuit debugging:

In order to simplify the structure of thyristor gating circuit, trigger circuit use coil ratio is 1: 1 a isolating transformer.

Circuit working schematic diagram in the accompanying drawing to specifications, all the welding correctness and the welding quality of components and parts in the check circuit are confirmed can enter the debug phase that powers on after errorless.

The installation position of temperature-sensing probe should be determined according to structure, volume size and the personal experience of constant temperature oven.Miniature constant temperature case temperature-sensing probe should be installed in hatches between thing and the heating element RL; Large Box should be installed near the inflow point of hot blast.Concrete installation site conveniently is a principle to help all even personnel operation of the temperature inside the box.

When environment temperature below 15 ℃ the time, preset temperature is made as: T1=15 ℃, and temporary transient mark the temperature inside the box reference position, value is regulated the position of RP then; In the time of T2=45 ℃, heating element RL quits work immediately, writes down the geometric position of RP rotation rapidly.When then finding out the temperature inside the box: T1=15 ℃, heating element RL is in the position of outage substantially.Regulate RP through repeated multiple times like this, progressively find out also the temperature inside the box of all RP knob scale correspondences of mark.So far, the debugging work of controller circuitry is finished.

Claims

1. multipurpose thermostat controller is swung circuit, thyristor gating circuit, load circuit and heated condition indicating circuit and is formed by pulse stabilized voltage supply, the Zhang Zhen that speeds of 12V, and it is characterized in that: thyristor gating circuit is 1: 1 isolating transformer with primary and secondary coil ratio.

2. multipurpose thermostat controller according to claim 1, it is characterized in that: 12V pulsation stabilized voltage supply is by dropping resistor (R1), silicon rectifier diode (D2) and voltage stabilizing diode (D1) are formed, the end of R1 connects (L) end of civil power live wire by power switch (SW), the positive pole of another termination D2 of R1, positive pole of stabilized voltage supply output terminal (VCC) by D2 with constitute the plus earth of D1 after the negative pole of D1 links to each other.

3. multipurpose thermostat controller according to claim 1, it is characterized in that: the Zhang Zhen that speeds swings circuit by resistance (R2), potentiometer (RP), thermistor (RT), electric capacity (C1), resistance (R3) and unijunction transistor (BG1) are formed, the end of RP meets VCC by resistance R 2, the lever arm of RP and the other end of RP connect the end of RT respectively, the other end of RT connects the E pin of BG1 and the end of C1 respectively, the other end ground connection of C1, the B2 pin of BG1 meets VCC by resistance R 3, the B1 pin of BG1 connects negative pole, the other end that BT is elementary and the plus earth of D3 of elementary end of isolating transformer (BT) and D3 respectively.

4. multipurpose thermostat controller according to claim 1, it is characterized in that: thyristor gating circuit is made up of the secondary and silicon rectifier diode (D4) of isolating transformer (BT), the positive pole of the secondary termination D4 of BT, the negative pole of D4 connects the control utmost point of controllable silicon (VT), the negative electrode of another termination VT of BT level and the anode of DC ammeter (A).

5. multipurpose thermostat controller according to claim 1, it is characterized in that: load circuit and heated condition indicating circuit are made up of DC ammeter (A), heating element (RL) and resistance (R5), light emitting diode (D5), the negative electrode of the positive termination controllable silicon VT of reometer A, the negative terminal of reometer A connects the end of RL and the end of R5 respectively, positive pole, the other end of RL and the minus earth of D5 of another termination D5 of R5.