CN201298154Y

CN201298154Y - Embedded boiler controller

Info

Publication number: CN201298154Y
Application number: CNU2008201064903U
Authority: CN
Inventors: 高峰; 王富强; 刘淑明; 夏士涛; 杨静涛; 杨宝栓; 王伟; 窦海平; 高志颖
Original assignee: HEBEI HUAXIN BOILER GROUP CO Ltd
Current assignee: HEBEI HUAXIN BOILER GROUP CO Ltd
Priority date: 2008-11-11
Filing date: 2008-11-11
Publication date: 2009-08-26
Anticipated expiration: 2018-11-11

Abstract

The utility model discloses an embedded boiler controller, which comprises a control unit, a switching power supply which is connected with a control unit, a liquid crystal display screen and a keyboard which is used for setting parameters. The control unit comprises a control chip and a peripheral circuit thereof, a power supply circuit, a liquid crystal display screen connection circuit, a keyboard interface circuit, a switching input circuit, a temperature measurement circuit and a switching output circuit; wherein, the control chip is provided with 100 pins and A / D and D / A conversion pins; and the power supply circuit is connected with the control chip. The utility model automatically controls the fuel, gas and coal boiler, realizes the accident alarm and interlock protection function and the measurement of two temperature signals with high accuracy, has the data display function with the liquid crystal display screen, judges the changes of the operating parameters of the boiler, controls the start-stop of the AC motor, and further realizes the safety protection and automatic control of the boiler. The utility model has the advantages of small volume and compact structure, is directly arranged on the boiler control cabinet, and reduces the manufacturing cost of the boiler.

Description

Embedded boiler controller

Technical field

The utility model relates to the automaton that a kind of boiler is used, and refers in particular to the Embedded controller of a kind of fuel oil, combustion gas, coal-burning boiler.

Background technology

At present the control to large-sized boiler generally all is to adopt computer control, and various Monitoring Data are input in the computing machine, by computing machine the operation conditions of boiler is monitored, and realizes the functions such as startup, operation, interlocking, warning of boiler.Disclosing a kind of multifunctional pot furnace controller as Chinese patent application 91111660.5 is can be indoor by using the multifunctional pot furnace controller of the every function of system controlled by computer boiler.This controller comprises radio remote controller, an indoor controller and is located at master controller on the boiler; Control method to boiler is directly to control or control from the function select signal and the control signal of radio remote controller by the indoor controller reception by boiler master controller, this controller also can show such as room temperature, the cumulative time of design temperature, time set and selected various functions meet fault and also can report to the police automatically.But computing machine needs the layout of some complex apparatus and line, can increase the manufacturing cost of boiler, and the structure of this technology is more complicated also, and volume ratio is huger.

And for miniature boiler, because control variable is few, so controller is just simple in structure, major part all is to adopt electrical control cabinet directly to control on the market now.But then there is the high shortcoming of failure rate in the electric product that electrical control cabinet adopted with respect to system controlled by computer, break down easily, the difficult requirement of satisfying boiler safety stable operation.

The utility model content

The utility model technical issues that need to address provide a kind of miniature embedded boiler controller; it can be applicable to the automatic control of fuel oil, combustion gas, coal-burning boiler; can realize temperature signal measurement and data presentation function; the operational factor of judging boiler changes; the start and stop of control motor; realize accident alarming and interlock protection function, guarantee the safety of boiler.

For solving the problems of the technologies described above, technical solution adopted in the utility model is:

Embedded boiler controller is made of the keyboard that carries out parameter setting, Switching Power Supply, liquid crystal display, control module.Keyboard is non-encoder matrix keyboard, and Switching Power Supply is the power supply with direct current 12V and two kinds of outputs of 5V, and the dot matrix 128 * 64 of liquid crystal display can realize that character shows; Control module comprises C8051F020 control chip and peripheral circuit thereof and the power circuit that is connected with the C8051F020 control chip, liquid crystal display connecting circuit, keyboard interface circuit, switching value input circuit, temperature measuring circuit, switching value output circuit.

The concrete syndeton of control chip of the present utility model and peripheral circuit and each circuit is: control chip U1 adopts to be had 100 pins and carries mould/number and the C8051F020 chip of D/A switch pin, and the

1,2,3,4 of control chip U1 links to each other with DLL (dynamic link library) J7 and reset circuit respectively;

10,13,38,63,89 ground connection of U1; The

11,14,28,37,64,90 of U1 links to each other with the 3.3V positive source; The

12,15,16,17 of U1 links to each other with capacitor C 3, the C4 of parallel connection respectively, the other end ground connection of capacitor C 3, C4; The

18,19 of U1 links to each other with output signal end AD-T1, the AD-T2 of two-way temperature measuring circuit; The pin 26,27 of U1 is connected with crystal oscillating circuit; The 39th～46 pin of U1 links to each other with the switching value input circuit; The pin 54～49 of U1 is connected with keyboard interface circuit; The pin 72～65 of U1 is as data transmission interface and resistance row PR1; The pin 48 of U1, pin 78,79 and pin 91,92 link to each other with the joint J10 of liquid crystal display connecting circuit; The pin 88～85 of U1 is connected with the switching value output circuit; All the other pins of U1 are standby pin, do not connect element.

The concrete connected mode of control chip of the present utility model and peripheral circuit is: the

1,2,3,4 of U1 links to each other with the

5,4,7,6 of DLL (dynamic link library) J7 respectively; The pin 2 of U1 links to each other with resistance R 1 again, and the other end of R1 is connected with the positive pole of 3.3V power supply.The pin 1 of DLL (dynamic link library) J7 links to each other with the 3.3V power supply, and the pin of

J7

2,3,9 links to each other with ground; The pin 5 of U1 and resistance R 15, capacitor C 2, resistance R 14,3.3V power supply form the reset circuit of U1.Crystal oscillating circuit is made up of capacitor C 5, C6, resistance R 19, crystal oscillator Y2 (Y222.1184M crystal oscillator), and the capacitor C 5 of series connection, C6 and resistance R 19, crystal oscillator Y2 are connected in parallel, ground connection between capacitor C 5, the C6.

The concrete syndeton of keyboard interface circuit of the present utility model is: the pin 54,53,52,51,50,49 of U1 is defined as P30, P31, P32, P33, P34, P35, the

1,2,3 of code translator U3 links to each other with P30, P31, P32 respectively, link to each other with resistance R 7, R8, R9 respectively again, the other end of resistance R 7, R8, R9 links to each other with the positive pole of 5V power supply again;

4,5,8 ground connection of U3,

6 and 16 connects the 5V power supply; Resistance R 5, R6, R10 link to each other with the 5V power supply.The other end of resistance R 5, R6, R10 links to each other with pin P35, P34, P33, and links to each other with resistance R 13, R12, R11 respectively; Resistance R 13, R12, R11 link to each other with the

8,9,10 of joint J1; The

15,14,13,12,11,10,9 of U3 links to each other with 1,2,3,4,5,6,7 of J1.

The concrete syndeton of power circuit of the present utility model is: the 12V power supply positive and negative electrode of Switching Power Supply links to each other with the

1,2 of joint J17 or J14 respectively.Filter capacitor C17 in parallel, C7, C8, C16, C15, C20, C21 between the

1,2 of joint J17, J14; Simultaneously, the positive and negative electrode of the 5V power supply of Switching Power Supply links to each other with 1,2 of joint J3, connects the light emitting diode D2 of resistance R 23, a power supply indicative function between the

joint J3 pin

1,2; In addition, filter capacitor C11 also in parallel, C12, C18, C22, C23 between the

joint J3 pin

1,2; By connecting three terminal regulator U7, can obtain direct current 3.3V power supply (VDD3.3V); Filter capacitor C13 in parallel, C14, C24, C25, C26, C15 between the

2,1 of U7.

The concrete syndeton of liquid crystal display connecting circuit of the present utility model is: the pin 72,71,70,69,68,67,66,65 of U1 is defined as D0, D1, D2, D3, D4, D5, D6, D7, the pin 78,79 of U1 is defined as LCD-CD, LCD-CE, the pin 91,92 of U1 is defined as WR-S, RD-S, and the pin 88,87,86,85 of U1 is defined as P50, P51, P52, P53.The

2,3,4,5,6,7,8,9 of eight same-phase three-state transceiver U6 links to each other with D0, D1, D2, D3, D4, D5, D6, D7; The pin 20 of U6 connects the positive pole of 5V power supply, and pin 19 links to each other with LCD-CE, and pin 1 links to each other with RD-S; The

18,17,16,15,14,13,12,11 of U6 is defined as LCDD0, LCDD1, LCDD2, LCDD3, LCDD4, LCDD5, LCDD6, LCDD7, and continuous with the

2,3,4,5,6,7,8,9 of resistance row RP3, the pin 1 of resistance row RP3 links to each other with the positive pole of 5V power supply; Simultaneously,

2,18 ground connection of liquid crystal display joint J10,

3,19 connects the positive pole of 5V power supply, is connected potentiometer R20 between the

4 and 20, and R20 connects the positive pole of 5V power supply again; The

5,6 of joint J10 connects WR-S, RD-S, and

7,8,9 connects LCD-CE, LCD-CD, LCDRST; The

10,11,12,13,14,15,16,17 of joint J10 connects LCDD0, LCDD1, LCDD2, LCDD3, LCDD4, LCDD5, LCDD6, LCDD7.

The concrete syndeton of switching value input circuit of the present utility model is: the pin 2 of joint J11,4,6,8,10,12,14,16 ground connection,

1,3,5,7,9,11,13,15 respectively with photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, the pin 2 of U15 links to each other, resistance R 24, R25, R26, R27, R28, R29, R30, the end of R31 links to each other with the positive pole of 12V power supply, the other end respectively with light emitting diode D3, D4, D5, D6, D7, D8, D9, D10 links to each other, light emitting diode D3, D4, D5, D6, D7, D8, D9, the other end of D10 and photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, the pin 1 of U15 links to each other; The pin 39,40,41,42,43,44,45,46 of U1 is respectively defined as P27, P26, P25, P24, P23, P22, P21, P20 as the switching value input pin, and the pin 4 of photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, U15 links to each other with P20, P21, P22, P23, P24, P25, P26, P27 respectively; The pin 4 of photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, U15 links to each other with 2,3,4,5,6,7,8,9 of resistance row RP4 respectively again, and the pin 1 of resistance row RP4 links to each other with the pin 2 of joint J4; The pin 3 of joint J4 connects the positive pole of 5V power supply, pin 1 ground connection; Pin 3 ground connection of photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, U15.

The concrete syndeton of temperature measuring circuit of the present utility model is: the pin 1 of joint J8 links to each other with a lead-in wire (PT3A) of thermal resistance (PT100), and another root lead-in wire of thermal resistance links to each other with pin 2, and ground connection; PT3A links to each other with resistance R 71, filter capacitor C27 and amplifier LM358 again, the positive pole of another termination 5V power supply of R71, the other end ground connection of C27; Amplifier adopts LM358, U34A, U34B are made up of the relevant pin of LM358, the pin 8 of U34A connects the positive pole of 5V power supply, pin 4 ground connection, the pin 3 of U34A links to each other with PT3A, resistance R 71, capacitor C 27, pin 2 links to each other with potentiometer R82, and the other end of R82 links to each other with resistance R 83, the other end ground connection of R83; Be parallel with capacitor C 28, resistance R 72 between the

2,1 of U34A, the pin 1 of U34A links to each other with resistance R 73, another termination capacitor C 29 of R73 and the pin 5 of U34B, the other end ground connection of capacitor C 29; The pin 6 of U34B links to each other with resistance R 84, and the other end of R84 links to each other with capacitor C 31 with ground; The pin 7 of U34B links to each other with resistance R 75, and R75 links to each other with the other end of capacitor C 31; Parallel resistance R74, capacitor C 30, potentiometer R85 between the

6,7 of U34B; The voltage of resistance R 75 is defined as AD-T1, is connected with the pin 18 of control chip.

The concrete syndeton of switching value output circuit of the present utility model is: the pin 1 connecting resistance R44 of photoelectrical coupler U25, the positive pole of another termination 5V power supply of R44; The pin 2 of U25 connects the output pin 88 (output pin 88 of U1 is defined as P50) of control chip U1; The pin 4 of U25 connects the positive pole of 12V power supply, the pin 1 of pin 3 connecting resistance R58 and eightfold Darlington phase inverter U30, the other end ground connection of R58; The pin 18 of eightfold Darlington phase inverter U30 is defined as OUT1, links to each other the positive pole of another termination 12V power supply of coil with the coil of relay Z1; The coil two ends of relay Z1 are connected in parallel to the light emitting diode D18 and the resistance R 40 of diode D17 and series connection; Contact N, the O1 of relay Z1 links to each other with the pin of

joint J2

7,1.

Owing to adopted technique scheme, the obtained technical progress of the utility model is:

The utility model is Embedded boiler controller, and its volume is little, compact conformation, and the layout of complex apparatus and line such as do not need to use a computer can reduce the manufacturing cost of boiler.It adopts the C8051F020 control chip with 100 pin; carry mould/number and D/A switch pin on the chip; can realize that analog quantity input and output function are by writing control program; the output state of output pin is changed; can realize temperature signal measurement and data presentation function, thereby realize automatic control function, judge that the operational factor of boiler changes; the start and stop of control motor realize accident alarming and interlock protection function.It can be applicable to the automatic control of fuel oil, combustion gas, coal-burning boiler, guarantees the safety of boiler, satisfies the control needs of most of Industrial Boiler.

Temperature circuit of the present utility model has adopted two-stage to amplify and software segments linearization structure, the voltage amplification to 0 at thermal resistance two ends～5V, pass through the A/D translation interface of control chip then, convert magnitude of voltage to digital quantity, in control program, divide at PT100 on the basis of kilsyth basalt, pass through piecewise-linear techniques, can calculate the temperature value corresponding, realize the temperature survey function, can improve the measuring accuracy of temperature with this magnitude of voltage.The utility model has designed keyboard interface circuit, and in conjunction with the built-in FLASH storer of single-chip microcomputer C8051F020, can revise the numerical value of controlled variable, has saved external memorizer, still can satisfy the requirement of Industry Control, has improved the stability of product.

Description of drawings

Fig. 1 is the connection diagram of C8051F020 control chip of the present utility model and its peripheral circuit and other circuit;

Fig. 2 is keyboard interface circuit of the present utility model, potential circuit, liquid crystal display connecting circuit figure;

Fig. 3 is switching value input circuit figure of the present utility model;

Fig. 4 is temperature measuring circuit figure of the present utility model, and the two-way temperature measurement circuit has drawn among the figure;

Fig. 5 is switching value output circuit figure of the present utility model;

Fig. 6 is total attachment structure synoptic diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further details:

Embedded boiler controller is made of keyboard, Switching Power Supply, liquid crystal display, control module.Keyboard is non-encoder matrix keyboard, adopts 7 * 3 matrixes, has 21 buttons, and each button occupies the point of crossing of unique row and row, by rank scanning, judges the state of button, can realize the parameter setting function.Switching Power Supply is selected the power supply that direct current 12V and two kinds of outputs of 5V can be provided for use, is the outsourcing product.The dot matrix 128 * 64 of liquid crystal display can realize that character shows, is the outsourcing product.Control module is made up of control chip and peripheral circuit, power circuit, liquid crystal display connecting circuit, keyboard interface circuit, switching value input circuit, temperature measuring circuit, switching value output circuit seven parts.

Control chip and peripheral circuit are as shown in Figure 1.Control chip U1 is the C8051F020/2 chip, 100 pins are arranged, be set at pin 1～100 successively, carry mould/number and D/A switch pin, can realize that analog quantity input and output function are by writing control program, the output state of output pin is changed, thereby realize automatic control function.

Wherein, control

chip U1 pin

1,2,3,4 links to each other with the

5,4,7,6 of DLL (dynamic link library) J7 respectively.The pin 2 of control chip U1 links to each other with resistance R 1 again, and the other end of R1 is connected with the positive pole of 3.3V power supply.The pin 1 of DLL (dynamic link library) J7 links to each other with the 3.3V power supply, and the pin of

J7

2,3,9 links to each other with ground.The pin 5 of control chip U1 and resistance R 15, capacitor C 2, resistance R 14,3.3V power supply form the reset circuit of U1.

The

10,13,38,63,89 of control chip U1 links to each other with ground, and the

11,14,28,37,64,90 of U1 links to each other with the 3.3V positive source.The

12,15,16,17 of control chip U1 links to each other with capacitor C 3, C4 respectively, the other end ground connection of capacitor C 3, C4; The

18,19 of U1 links to each other with output signal end AD-T1, the AD-T2 of two-way temperature measuring circuit; The pin 26,27 of U1 is connected with crystal oscillating circuit, and crystal oscillating circuit is made up of capacitor C 5, C6, resistance R 19, crystal oscillator Y2 (Y222.1184M crystal oscillator), and the capacitor C 5 of series connection, C6 and resistance R 19, crystal oscillator Y2 are connected in parallel, ground connection between capacitor C 5, the C6.

The pin 39,40,41,42,43,44,45,46 of control chip U1 is respectively defined as P27, P26, P25, P24, P23, P22, P21, P20, as the switching value input pin, and with Fig. 3 in the switching value input circuit in photoelectrical coupler U15, U14, U13, U12, U11, U10, the pin of U9, U8 link to each other; The pin 48 of U1 is defined as LCD-RST, links to each other with the pin 9 of liquid crystal display joint J10 among Fig. 2, and liquid crystal display is resetted; The pin 54,53,52,51,50,49 of U1 is defined as P30, P31, P32, P33, P34, P35, and respectively with Fig. 2 in keyboard interface circuit in the

1,2,3 of code translator U3 link to each other with resistance R 10, R6, R5; The pin 72,71,70,69,68,67,66,65 of U1 is defined as D0, D1, D2, D3, D4, D5, D6, D7, be used as data transmission interface, be connected with the

2,3,4,5,6,7,8,9 of resistance row PR1, the pin 1 of resistance row PR1 connects the 5V direct supply; It is continuous with the

7,8 of liquid crystal display joint J10 that the pin 78,79 of U1 is defined as LCD-CD, LCD-CE; The pin 91,92 of U1 is defined as WR-S, RD-S, links to each other with the

5,6 of J10 among Fig. 2; The pin 88,87,86,85 of U1 is defined as photoelectrical coupler U25, the U26 among P50, P51, P52, P53 and Fig. 5, the pin 2 of U27, U28 is connected the output of gauge tap amount.All the other pins of U1 do not connect element.

Above-mentioned keyboard interface circuit as shown in Figure 2.Wherein the

1,2,3 of code translator U3 links to each other with P30, P31, P32 respectively, links to each other with resistance R 7, R8, R9 respectively again, and the other end of resistance R 7, R8, R9 links to each other with the positive pole of 5V power supply;

4,5,8 ground connection of U3,

6 and 16 connects the 5V power supply.Resistance R 5, R6, R10 link to each other with the 5V power supply, and the other end of resistance R 5, R6, R10 links to each other with pin P35, P34, P33, and link to each other with resistance R 13, R12, R11; Resistance R 13, R12, R11 link to each other with the

8,9,10 of joint J1.The

15,14,13,12,11,10,9 of code translator U3 links to each other with 1,2,3,4,5,6,7 of J1.The different output states of P30, P31, P32 (high and low level), can make a pin output low level among Y0, Y1, Y2, Y3, Y4, Y5, the Y6, and other 6 pins output high level, and judge the state of P33, P34, P35, whether can discern keyboard thus is pressed, according to the button situation, and utilize the built-in FLASH storer of single-chip microcomputer C8051F020/2, can carry out the setting and the storage of controlled variable.

Power circuit also is plotted in as among Fig. 2, and the 12V power supply positive and negative electrode of Switching Power Supply links to each other with the

1,2 of joint J17 or J14.Shunt capacitance C17, C7, C8, C16, C15, C20, C21 between the

1,2 of joint J17, J14, these electric capacity strobe.The positive and negative electrode of the 5V power supply of Switching Power Supply links to each other with 1,2 of joint J3, connects resistance R 25, light emitting diode D2 between the

1,2, can play the power supply indicative function.Shunt capacitance C11, C12, C18, C22, C23 play filter action between the pin 1,2.Shunt capacitance C13, C14, C24, C25, C26, C15 can play filter action between the

2,1 of U7.By connecting three terminal regulator U7, can obtain direct current 3.3V power supply (VDD3.3V).

The liquid crystal display connecting circuit also is plotted among Fig. 2, and the

2,3,4,5,6,7,8,9 of eight same-phase three-state transceiver U6 links to each other with D0, D1, D2, D3, D4, D5, D6, D7.The pin 20 of U6 connects the positive pole of 5V power supply, and pin 19 links to each other with LCD-CE, and pin 1 links to each other with RD-S.The

2,3,4,5,6,7,8,9 of resistance row RP3, the pin 1 of resistance row RP3 links to each other with the positive pole of 5V power supply.Simultaneously,

2,18 ground connection of liquid crystal display joint J10,

4 and 20, and R20 connects the positive pole of 5V power supply again.Can regulate the display effect of liquid crystal display by the resistance of regulator potentiometer.The

5,6 of joint J10 connects WR-S, RD-S, and

7,8,9 connects LCD-CE, LCD-CD, LCDRST, realizes the control of read-write sequence.The

10,11,12,13,14,15,16,17 of joint J10 connects LCDD0, LCDD1, LCDD2, LCDD3, LCDD4, LCDD5, LCDD6, LCDD7.When the pin 19 of U6, when pin 1 is distinguished low level, high level, the state of

18,17,16,15,14,13,12,11 is identical with

2,3,4,5,6,7,8,9 respectively, can carry out data transmission to liquid crystal display like this.

The switching value input circuit as shown in Figure 3.The pin 2 of joint J11 among the figure, 4,6,8,10,12,14,16 ground connection,

1,3,5,7,9,11,13,15 respectively with photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, the pin 2 of U15 links to each other, resistance R 24, R25, R26, R27, R28, R29, R30, the end of R31 links to each other with the positive pole of 12V power supply, the other end respectively with light emitting diode D3, D4, D5, D6, D7, D8, D9, D10 links to each other, light emitting diode D3, D4, D5, D6, D7, D8, D9, the other end of D10 and photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, the pin 1 of U15 links to each other.The pin 4 of photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, U15 links to each other with P20, P21, P22, P23, P24, P25, P26, P27 respectively.The pin 4 of photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, U15 links to each other with 2,3,4,5,6,7,8,9 of resistance row RP4 respectively again, and the pin 1 of resistance row RP4 links to each other with the pin 2 of joint J4.The pin 3 of joint J4 connects the positive pole of 5V power supply, pin 1 ground connection.When circuit need connect low level or high level, can be with the pin short circuit of joint J4.Pin 3 ground connection of photoelectrical coupler U8, U9, U10, U11, U12, U13, U14, U15.When joint J11 corresponding pin (as 1 and 2,3 and 4 etc.) when connecting, the light emitting diode conducting of photoelectrical coupler is connected triode, and the pin of photoelectrical coupler 4 becomes low level by high level, the state of pin 4 inputs to the relevant pin of control chip as the switching value input signal.

Temperature measuring circuit has been drawn the two-way temperature measuring circuit as shown in Figure 4 among the figure.The pin 1 of joint J8 among the figure links to each other with a lead-in wire (PT3A) of thermal resistance (PT100), and another root lead-in wire of thermal resistance links to each other with pin 2, and ground connection.PT3A links to each other with resistance R 71 again, the positive pole of another termination 5V power supply of R71.PT3A links to each other with capacitor C 27 with R71, and the other end ground connection of C27 strobes.Amplifier adopts LM358, and U34A, U34B are made up of the relevant pin of LM358.The pin 8 of U34A connects the positive pole of 5V power supply, pin 4 ground connection.The pin 3 of U34A links to each other with PT3A, resistance R 71, capacitor C 27, and pin 2 links to each other with potentiometer R82, and the other end of R82 links to each other with resistance R 83, the other end ground connection of R83.Between the

2,1 of U34A, shunt capacitance C28, resistance R 72.The pin 1 of U34A links to each other with resistance R 73, another termination capacitor C 29 of R73 and the pin 5 of U34B, the other end ground connection of capacitor C 29.The pin 6 of U34B links to each other with resistance R 84, and the other end of R84 links to each other with capacitor C 31 with ground.The pin 7 of U34B links to each other with resistance R 75, and R75 links to each other with the other end of capacitor C 31.Parallel resistance R74, capacitor C 30, potentiometer R85 between the

6,7 of U34B.The voltage of resistance R 75 is defined as AD-T1, is connected with the pin 18 of control chip.This circuit amplifies through two-stage, the voltage amplification to 0 at thermal resistance two ends～5V, pass through the A/D translation interface of control chip then, convert magnitude of voltage to digital quantity, in control program, divide at PT100 on the basis of kilsyth basalt, pass through piecewise-linear techniques, can calculate the temperature value corresponding, realize the temperature survey function with this magnitude of voltage.The second road temperature measuring circuit structure is identical with above-mentioned situation with principle, narration no longer one by one shown in figure four the latter halfs.

The switching value output circuit as shown in Figure 5.This product design 4 way switch amount output circuits, now introduce the first via, the road is identical therewith with principle for other structure of three tunnel, just the symbol difference of the electric elements among the figure.The pin 1 connecting resistance R44 of photoelectrical coupler U25, the positive pole of another termination 5V power supply of R44.The pin 2 of U25 connects the output pin 88 (being defined as P50) of control chip.The pin 4 of U25 connects the positive pole of 12V power supply, the pin 1 of pin 3 connecting resistance R58 and eightfold Darlington phase inverter U30, the other end ground connection of R58.The pin 18 of U30 is defined as OUT1, links to each other the positive pole of another termination 12V power supply of coil with the coil of relay Z1.The coil two ends of relay Z1 light emitting diode D18 in parallel and resistance R 40, the coil two ends are parallel diode D17 again.Contact N, the O1 of relay Z1 links to each other with the pin of joint J2 7,1.When P50 was high level, the light emitting diode of photoelectrical coupler U25 did not have electric current to pass through, and was off state between the

3,4, the pin 1 of U30 is a low level, and OUT1 is a high level, therefore, the coil of relay Z1 can not adhesive, is off-state between contact N, the O1.When P50 was low level, the light emitting diode of photoelectrical coupler U25 had electric current to pass through, and was communicated with between the

3,4, and the pin 1 of U30 is a high level, and OUT1 is a low level, and therefore, the coil adhesive of relay Z1 is connected state between contact N, the O1.So just can realize electric switch control.

Claims

1, a kind of embedded boiler controller, comprise control module and the Switching Power Supply that is connected with control module, liquid crystal display, keyboard, it is characterized in that: control module comprises having 100 pins and carry the control chip (U1) of mould/number and D/A switch pin and peripheral circuit and the power circuit that is connected with control chip, liquid crystal display connecting circuit, keyboard interface circuit, switching value input circuit, temperature measuring circuit, switching value output circuit.

2, embedded boiler controller according to claim 1, it is characterized in that described control chip and peripheral circuit thereof with the concrete syndeton of each circuit are: preceding four pins of control chip link to each other with DLL (dynamic link library) respectively, a pin reset circuit links to each other, be correspondingly provided with five pin ground connection, six pins that link to each other with the 3.3V positive source in the control chip, four filter capacitors that are connected with back in parallel ground connection are respectively arranged in the pin of control chip, and two pins connect crystal oscillating circuit; Two pins of control chip link to each other with the output signal end of two-way temperature measuring circuit, eight pins link to each other with the switching value input circuit, six pins are connected with keyboard interface circuit, five pins link to each other with the liquid crystal display connecting circuit, four pins are connected with the switching value output circuit, and eight pins link to each other with resistance row as data transmission interface; All the other pins of control chip do not connect element.

3, according to claim 1 or 2 described embedded boiler controllers, the peripheral circuit that it is characterized in that described control chip comprises reset circuit, crystal oscillating circuit, DLL (dynamic link library) circuit, control chip (U1) with the connected mode of peripheral circuit is: the pin of control chip (U1) (1,2,3,4) links to each other with the pin (5,4,7,6) of DLL (dynamic link library) (J7) respectively, the pin (1) of DLL (dynamic link library) (J7) and the pin (2) of control chip (U1) all link to each other with the 3.3V power supply, all the other pins of DLL (dynamic link library) (J7) (2,3,9) ground connection; A pin (5) of control chip (U1) is connected with the reset circuit that resistance (R14, R15), electric capacity (C2), 3.3V power supply are formed; Two pins (26,27) of control chip (U1) are connected with the crystal oscillating circuit of being made up of electric capacity (C5, C6), resistance (R19), crystal oscillator (Y2).

4, according to claim 1 or 2 described embedded boiler controllers, it is characterized in that described keyboard interface circuit comprises the code translator (U3) that links to each other respectively with the respective pins (54,53,52) of control chip (U1), be connected with resistance (R7, R8, R9) respectively on the pin (1,2,3) of the code translator (U3) that links to each other with control chip (U1), two pins (6 and 16) of the other end of resistance (R7, R8, R9) and code translator (U3) all positive pole with the 5V power supply link to each other, three pins (4,5,8) ground connection of code translator (U3); The other pin of code translator (U3) is connected with joint (J1), is provided with three tunnel resistance (R5 and R13, R6 and R12, R10 and R11) that link to each other with control chip (U1) between pin that code translator (U3) links to each other with the positive pole of 5V power supply and the joint (J1).

5, according to claim 1 or 2 described embedded boiler controllers, it is characterized in that described power circuit comprise be connected Switching Power Supply the 12V power supply just, filter capacitor (C17 in parallel between the negative pole, C7, C8, C16, C15, C20, C21), with the 5V power supply of Switching Power Supply just, negative pole connects three terminal regulator (U7), the 5V power supply just, be connected with resistance (R23) and light emitting diode (D2) and the filter capacitor (C11 in parallel that connects between negative pole and three terminal regulator (U7) grounding pin (1) and the input pin (3) with resistance and light emitting diode, C12, C18, C22, C23), filter capacitor (C13 in parallel between the grounding pin (1) of three terminal regulator (U7) and output pin (2), C14, C24, C25, C26, C15).

6, according to claim 1 or 2 described embedded boiler controllers, it is characterized in that described liquid crystal display connecting circuit comprises corresponding eight same-phase three-state transceivers (U6) that are connected with the pin of control chip (U1), be connected with resistance row (RP3), liquid crystal display joint (J10) on eight same-phase three-state transceivers (U6), liquid crystal display joint (J10) is provided with the pin of the pin of ground connection and the positive pole that connects the 5V power supply and the pin that is connected potentiometer (R20); Eight same-phase three-state transceivers (U6) are provided with anodal pin and the grounding pin that connects the 5V power supply, and all the other pins are defined as and liquid crystal display, control chip (U1) corresponding interface.

7, according to claim 1 or 2 described embedded boiler controllers, it is characterized in that described switching value input circuit comprises eight photoelectrical couplers (U8, U9, U10, U11, U12, U13, U14, U15), a pin (1) of each photoelectrical coupler links to each other with the positive pole of resistance with the 12V power supply by light emitting diode respectively, and a pin (4) of each photoelectrical coupler is corresponding continuous with respective pins that is defined as switching value input pin control chip (U1) and resistance row's (RP4) pin respectively; The pin of each photoelectrical coupler (3) ground connection.

8, according to claim 1 or 2 described embedded boiler controllers, it is characterized in that described temperature measuring circuit comprises the amplifier (LM358) that the electric capacity (C27) of resistance (R71) by connecing the 5V positive source, ground connection links to each other with thermal resistance, be connected with resistance, filter capacitor and potentiometer between the output terminal of the first order amplifier (U34A) of amplifier (LM358) and the input end of second level amplifier (U34B), be connected with the resistance (R75) that is connected with the pin of control chip (U1) on the amplifier input terminal of the second level.

9, according to claim 1 or 2 described embedded boiler controllers, it is characterized in that described switching value output circuit comprises eightfold Darlington phase inverter (U30), four tunnel photoelectrical coupler and the relays that are connected with the 12V positive source respectively that are connected with eightfold Darlington phase inverter (U30) respective pins, a pin of every road photoelectrical coupler also connects the positive pole of 5V power supply by resistance, another pin connects control chip (U1), and eightfold Darlington phase inverter (U30) passes through resistance eutral grounding with the contact of photoelectrical coupler; The coil two ends of every road relay are connected in parallel to the light emitting diode and the resistance of diode and series connection.