CN2898902Y

CN2898902Y - Automatic microcomputer controller

Info

Publication number: CN2898902Y
Application number: CN 200620090529
Authority: CN
Inventors: 权昌学
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-25
Filing date: 2006-04-25
Publication date: 2007-05-09
Anticipated expiration: 2016-04-25

Abstract

The utility model relates to a temperature control switch gear, in particular to an automatic microcomputer controller, which is the preferential temperature control product for electric carpet and electric mattress manufacturer. The utility model comprises a full-wave bridge rectifier circuit for supplying DC power to the control circuit; the input terminal of a double-way photo-coupler switch circuit is connected with the No.1, 2 pin of output terminal of microcomputer chip while the output terminal of the double-way photo-coupler switch circuit is connected with the input terminal of a double-way silicon controlled circuit, the output terminal of the double-way silicon controlled circuit is connected with two sets of heater; the input terminal of the automatic temperature control circuit is connected with No.5,6,7,8 pin of the chip while the output terminal of the automatic temperature control circuit is connected with a thermal resistor; an automatic time control circuit is formed by the microcomputer chip and a microcomputer oscillation circuit comprising a quartz crystal connected with No. 13,14 pin of the input terminal of the microcomputer chip. The utility model can meet the different utilization requirements for making different users to feel warm and comfortable, which obviously improve the effective utilization rate of electric energy and save energy sources; Additionally, the utility model can purify indoor air, and has a function on health care and magnetic therapy, and obviously lower electromagnetic wave level, and benefit the health of users.

Description

Micro computer full automatic temperature controller

Technical field

The utility model relates to a kind of temperature control switchgear, particularly micro computer full automatic temperature controller, is electric blanket and the temperature control auxiliary products that heat mattress production factory first-selection.

Background technology

Electric blanket almost becomes the articles for use of northern China family indispensability, although north of china in winter is indoor heating installation is arranged, but the electric blanket sleep is all liked spreading by general family during sleep, quilt is warm, particularly there is old man's family all the more so, must be extended to so always and stops just can stop using in several months after the heating installation.Therefore, electric blanket becomes one of product that is loved by the people.However commercially available in the past single, double people's electric blanket also exists in using practice process, and effective rate of utilization big such as the temperature difference, that temperature regulating range is little, the waste electric energy is promptly electric is low, can not satisfy the required comfortable warm parts not fully up to expectations such as request for utilization of different people.So its be like this since the temperature control switch of in the past electric blanket be manually and have only two shelves of high and low temperature cause to the user be not overheated be exactly not too hot uncomfortable sensation.Particularly Electric heat matress for double bed is felt heat and another person when just feeling to be fit to as one of them people in use, and this just further exposes the drawback that this kind electric blanket exists.The someone utilizes the temperature control switch of thermistor (temperature) sensor in recent years, though this switch solves the loose problem of electric blanket thermoregulation range, but the temperature difference reaches ± 15 ℃ problem still do not solve, and the temperature difference greatly just is difficult to satisfy the user and had not only basked but also comfortable request for utilization.Design temperature improves for solving the big problem of the temperature difference in some manufacturer when dispatching from the factory, can make electric current excessive like this, has the defective of uneconomical rational utilization of electricity.Electric blanket in the past in use produces and has the electromagnetic wave of harm to eliminate to human body simultaneously.

The utility model content

The problem that the utility model exists at prior art, provide a kind of temperature even, almost there is not the temperature difference, and energy regulated at will, thereby satisfying the different users had not only basked but also comfortable requirement, improve the effective rate of utilization of electric energy, economical rationality electricity consumption and having concurrently purifies air, the electromagnetic health-care physiotherapy function, and can obviously reduce electromagnetic wave and the user is had no adverse effects safe and reliable micro computer full automatic temperature controller.

The technical scheme of the utility model technical solution problem comprises that one provides the full-wave bridge rectifier circuit of direct supply, the input end of two-way optical coupled switch circuit to link to each other with 1,2 pin of the output terminal of microcomputer chip to control circuit, the input end of its output termination two-way SCR control circuit, two groups of well heaters of output termination; The input end of automatic temperature control circuit links to each other with 5,6,7,8 pin of chip, and output terminal links to each other with thermistor; Constitute the full-automatic time control circuit that the microcomputer oscillation circuit is formed by microcomputer chip with the quartz crystal that links to each other with its

input end

13,14 pin.

Described two-way SCR control circuit comprises No. one well heater SCR control circuit, its optocoupler pipe PC ₁6 pin pass through resistance R ₆, bidirectional triode thyristor TR ₃MT ₂The utmost point and contact H ₁Link to each other PC ₁4 pin of pipe pass through resistance R ₉An end and TR ₃Gate pole link to each other R ₉In addition end through MT ₁The utmost point and contact AC ₂Link to each other well heater Re ₁Be serially connected in H ₁And between Hc two contacts, optocoupler pipe PC ₁1 pin link to each other PC with contact VDD ₁2 pin by LED 5, R ₂₁Link to each other with 1 pin of chip; No. two well heater SCR control circuit, its well heater Re ₂Be serially connected in Hc and H ₂Between two contacts, contact H ₂By bidirectional triode thyristor TR ₄MT ₂The utmost point, resistance R ₇With optocoupler pipe PC ₂6 pin link to each other PC ₂4 pin pass through R ₁₀An end and TR ₄Gate pole link to each other R ₁₀In addition end pass through TR ₄MT ₁The utmost point and AC ₂Contact links to each other, optocoupler pipe PC ₂1 pin and VDD join PC ₂2 pin pass through LED ₆, R ₂₂Link to each other with 2 pin of chip.

Described automatic temperature control circuit comprises an output power initialization circuit and adjustment control circuit, and wherein the output power initialization circuit is the potentiometer VR that is linked to each other with the Sc contact with VDD respectively by two ends ₂With VR ₃Form, the centre tap of its this two potentiometers links to each other with 7,8 pin of chip respectively.Trimmer potentiometer SM in the adjustment control circuit ₂One termination VDD, the other end is by last inclined to one side value resistance R ₁₉One the tunnel connects another road of 5 pin of chip through capacitor C ₂₁Link to each other with the Sc contact, constitute a circuit temperature-controlling circuit; The trimmer potentiometer SM that links to each other with VDD by an end ₁, the other end is by last inclined to one side value resistance R ₂₀One the tunnel links to each other with 6 pin of chip, and another road is through capacitor C ₂₂With contact S _CLinking to each other constitutes another circuit temperature-controlling circuit, two thermistor Rt in parallel ₁, Rt ₂One end links to each other with its contact Sc, the other end respectively with contact S ₁, S ₂Link to each other.

Described full-automatic time control circuit comprises a microcomputer chip and the oscillation circuit that constitutes microcomputer by 13,14 pin and the quartz crystal of chip, and 3 pin of its chip pass through switch SW ₅Link to each other with the Sc contact, the VDD point passes through resistance R ₁₈, LED ₄Link to each other with 3 pin of chip, 11 pin, 12 pin link to each other with the VDD point, and 13 pin pass through capacitor C through an end of quartz crystal ₂₀With voltage stabilizing diode D ₁₂Anodal linking to each other, 14 pin pass through capacitor C through the other end of quartz crystal ₁₉With D ₁₂Anodal linking to each other, 18 pin are through LED ₃One end passes through switch SW ₃With D ₁₂Anodal linking to each other.

Also comprise an electromagnetic wave control circuit, its resistance R ₂By potentiometer VR ₁, resistance R ₃Meet AC ₂Point, resistance R ₂Two groups of well heater R of another termination _E1, R _E2Its contact Hc, potentiometer VR ₁Centre tap is by an end, the resistance R of LAMP lamp ₄Connect the ACG/G point, the other end of LAMP lamp passes through resistance R ₅Meet potentiometer VR ₁Shell forms control loop.

Described control circuit comprises that also an anion generator is made up of an astable circuit and 10 voltage doubling rectifing circuits, and an end of the pulse transformer B input in its astable circuit passes through switch SW ₂Link to each other with direct supply, centre tap passes capacitor C ₄With C ₅Between node be plugged on resistance R ₁₅With triode TR ₁Between the collector, R ₁₅The other end and TR ₁Base stage and capacitor C ₃One end links to each other, TR ₁Emitter link to each other C with Vss ₃Another input end, the R of the other end by pulse transformer B ₁₆, C ₆An end and TR ₂Collector link to each other, emitter connects the Vss point, base stage is passed through C ₆, R ₁₆The other end, C ₅, C ₄And R ₁₅The other end be connected to TR ₁Base stage and C ₃Between; The output terminal of pulse transformer B links to each other with two input ends of 10 voltage doubling rectifing circuits respectively, a termination capacitor C ₈, end is through D in addition ₂One end and C ₁₇Link to each other, the output terminal of 10 voltage doubling rectifing circuits links to each other with the effluve pin.

Described control circuit also comprises a myriameter waves SCR control circuit, and the end of its n electromagnetic induction coil Ln links to each other with its contact Hc, and the other end links to each other with contact c, optocoupler pipe PC ₃1 pin link to each other with contact VDD, 2 pin pass through LED ₇, resistance R ₂₃Link to each other with 4 pin of chip, 6 pin pass through resistance R ₈, bidirectional triode thyristor TR ₅MT ₂The utmost point links to each other with contact C, and gate pole is by an end and the optocoupler pipe PC of resistance R 11 ₃4 pin link to each other resistance R ₁₁The other end pass through TR ₅MT ₁The utmost point and AC ₂Link to each other.

The utility model compared with prior art, because adopted that microcomputer chip is controlled automatically, two-way SCR control, circuit such as temperature automatically controlled be provided with negative from taking place and myriameter waves SCR control and suppress a series of technical measures such as electromagnetic wave generation and evidence has temperature arbitrarily adjustable in addition, temperature does not evenly have the temperature difference, as long as setting a certain temperature just can remain on this temperature value, satisfying the different users had simultaneously not only basked but also comfortable different request for utilizations, obviously improve electric energy effective rate of utilization, suppress the consumption of unnecessary idle work electric energy, save the energy; The air in sleep space in simultaneously can also the decontamination chamber, enjoyment Magnetotherapeutic health effect can also obviously reduce electromagnetic wave in the process of snugness sleep, is beneficial to the healthy of user.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Fig. 3 is well heater Re, thermistor R _tAnnexation synoptic diagram with electromagnetic induction coil Ln and control circuit.

Fig. 4 is the temperature automatically controlled make-and-break time cyclic curve of microcomputer figure.

Embodiment

Embodiment of the present utility model 1,2,3 is described in detail in conjunction with the accompanying drawings, but not limit by embodiment.

Control circuit of the present utility model comprises that power unit is that power input voltage is AC220V50H _ZPass through switch SW ₁, through resistance R ₁, capacitor C ₁The filtering step-down is after pass through 3 pin, SW behind the bridge full-wave rectifier ₃Switch directly provides direct supply for anion generator, again through voltage stabilizing diode D ₁₂, capacitor C ₁₈Output is for micro computer time control circuit, myriameter waves delay control circuit 5V power supply after the voltage stabilizing.Described two-way well heater SCR control circuit comprises one group of well heater Re ₁The SCR control circuit, its optocoupler pipe PC ₁6 pin pass through resistance R ₆, bidirectional triode thyristor TR ₃MT ₂The utmost point and contact H ₁Link to each other PC ₁4 pin of pipe pass through resistance R ₉An end and TR ₃Gate pole link to each other R ₉In addition end through TR ₃MT ₁The utmost point and contact AC ₂Link to each other No. one well heater Re ₁Be serially connected in H ₁And between Hc two contacts, PC ₁1 pin meet VDD, PC ₁2 pin pass through LED ₅, resistance R ₂₁Connect 1 pin of chip; No. two well heater SCR control circuit, its two groups of well heater Re ₂Be serially connected in Hc and H ₂Between two contacts, contact H ₂By bidirectional triode thyristor TR ₄MT ₂The utmost point, resistance R ₇With optocoupler pipe PC ₂6 pin link to each other PC ₂4 pin pass through resistance R ₁₀An end and TR ₄Gate pole link to each other R ₁₀The other end through TR ₄MT ₁The utmost point is connected to AC ₂Point, optocoupler pipe PC ₂1 pin meet VDD, 2 pin pass through LED ₆, R ₂₂Connect 2 pin of chip HT46C47.

Described automatic temperature control circuit comprises an output power initialization circuit and adjustment control circuit, and wherein the output power initialization circuit is the potentiometer VR that is linked to each other with Sc with VDD respectively by two ends ₂With VR ₃Form, the centre tap of this two potentiometer links to each other with 7,8 pin of chip respectively; Trimmer potentiometer SM in the adjustment control circuit ₂One termination VDD, the other end is by last inclined to one side value resistance R ₁₉One the tunnel connects 5 pin of chip, and another road is through capacitor C ₂₁Meet SC, constitute one tunnel adjustment temperature-adjusting circuit; Trimmer potentiometer SM ₁An end link to each other with VDD, the other end is by last inclined to one side value resistance R ₂₀, capacitor C ₂₂With S _CPoint links to each other, two thermistor Rt in parallel ₁, Rt ₂One end links to each other with its contact Sc, the other end respectively with S ₁, S ₂Link to each other.6 pin of chip are plugged on R ₂₀With C ₂₂Between and extend to S ₂Point constitutes another road adjustment control circuit; Described full-automatic time control circuit comprises that a HT46C47 microcomputer chip and quartz crystal constitute microcomputer oscillation frequency circuit, and 3 pin of its chip pass through switch SW ₅With contact S _CLink to each other, 5 pin meet S ₁Point, 6 pin meet S ₂Point, 9 pin connect the Sc point, and 10 pin pass through switch SW ₄Connect the Sc point, the VDD point passes through resistance R ₁₈, LED ₄Be plugged on chip 3 pin and switch SW ₅Between, 11,12 pin VDD points link to each other, and 13 pin pass through capacitor C through an end of quartz crystal ₂₀Be plugged on voltage stabilizing diode D ₁₂And between the Sc, 14 pin pass through capacitor C through the other end of quartz crystal ₁₉With D ₁₂Link to each other, 18 pin are through LED ₃One end passes through switch SW ₃With D ₁₂Link to each other.

Comprise that also one negatively is one from generator and is made up of astable circuit and 10 voltage doubling rectifing circuits that an end of the pulse transformer B input in the astable circuit passes through switch SW ₂Link to each other with direct supply, centre tap passes through capacitor C ₄With C ₅Between node be plugged on resistance R ₁₅With triode TR ₁Collector between, another input end of pulse transformer B passes through resistance R ₁₆, capacitor C ₆An end and triode TR ₂Collector link to each other TR ₂Emitter meet V _SSPoint, base stage is passed through capacitor C ₆With resistance R ₁₆The other end, through capacitor C ₅, C ₄And resistance R ₁₅One is terminated at capacitor C ₃With triode TR ₁Base stage between, capacitor C ₃The other end and resistance R ₁₆An end link to each other resistance R ₁₅The other end and triode TR ₁Collector link to each other emitter and V _SSLink to each other, the output terminal of pulse transformer B links to each other with two input ends of 10 voltage doubling rectifing circuits respectively, a termination capacitor C ₈, end is through D in addition ₂One end and C ₁₇Link to each other, the output terminal output 5.5KV high direct voltage of 10 voltage doubling rectifing circuits makes air ionization produce the anion fine-purification air by the high pressure acusector; Also comprise a myriameter waves SCR control circuit, the end of its n electromagnetic induction coil Ln links to each other with its contact Hc, and the other end links to each other with contact C, optocoupler pipe P _C31 pin connect the VDD point, 2 pin are by LED 7, resistance R ₂₃Link to each other with 4 pin of chip, 6 pin pass through resistance R ₈, bidirectional triode thyristor TR ₅MT ₂The utmost point links to each other with the C point, and gate pole passes through resistance R ₁₁An end and optocoupler pipe PC ₃4 pin link to each other R ₁₁The other end pass through TR ₅MT ₁The utmost point meets AC ₂The point; Resistance R in the electromagnetic wave control circuit ₂A termination Hc point, R ₂The other end by potentiometer VR ₁, resistance R ₃Meet AC ₂Point, VR ₁Centre tap pass through resistance R ₄Connect the ACG/G point, VR ₁Shell passes through resistance R ₅, bulb LAMP is connected to VR ₁Centre tap and resistance R ₄Between form to suppress electromagnetic regulating loop.

AC power was passed through A when the utility model used _C1, A _C2Insert, press power switch SW ₁Full-wave bridge rectifier circuit work provides 5V power vd D from circuit for after voltage stabilizing control through output DC behind the step-down rectifier again, passes through switch SW ₃Energized is to low-potential signal of microcomputer chip input, and microcomputer chip is by the frequency programs of setting, and the starting of oscillation of quartz crystal oscillation circuit makes the interior automatic indication mechanism of chip synchronous, and meanwhile first output terminal is given optocoupler control circuit R ₂₁Import an electric signal, make the optical coupled switch circuit turn-on, then bidirectional triode thyristor TR ₃The work of conducting No. one well heater energized, its temperature height is finished by the adjustment control circuit; Temperature control varies with temperature conversion output voltage V 0 by bleeder circuit with the temperature detecting resistance value and varies with temperature and change, A/D by chip converts the temperature value that sets to again, the temperature value control of the time by chip again is converted into electric signal and feeds back to the chip order set, and first output terminal by chip flows to optocoupler PC again ₁The resistance R of control circuit ₂₁A low level signal, bidirectional triode thyristor TR ₃Conducting is through MT ₂The utmost point is by being serially connected in H ₁, the well heater Re between the Hc point ₁Become the delay cycle current supply circuit, do not have the temperature difference and remain on the temperature value that sets always, just go round and begin again later on, its another group well heater Re to guarantee temperature ₂Principle of work is with well heater Re ₁When connecting switch SW ₂The time, the astable circuit work in the anion generator circuit becomes alternating voltage with direct current, keeps apart by pulse transformer and presses output, through capacitor C ₈-C ₁₇, commutation diode D ₂-D ₁₁10 voltage doubling rectifing circuits of forming, output 5.5KV high direct voltage makes air ionization produce the air in anion fine-purification sleep space by the high pressure acusector; As closed SW ₄Switch imports a low-potential signal for 1 pin of chip, and the 3rd defeated end 4 pin of chip are given low-potential signal of myriameter waves optocoupler control loop, make PC ₃The conducting of optocoupler pipe, bidirectional triode thyristor TR simultaneously ₅Conducting promptly is connected on contact C and H _CBetween the control loop work that forms of n electromagnetic induction coil Ln.By potentiometer VR ₁The height of regulating current potential suppresses electromagnetic generation, passes through SW then ₄Switch sets a magnetic therapy work period by chip for a low-potential signal myriameter waves of chip circuit, and the phase is 40 minutes weekly, realizes sleep procedure enjoyment health magnetotherapy.

Claims

1, micro computer full automatic temperature controller, it is characterized in that comprising that one provides the full-wave bridge rectifier circuit of direct supply, the input end of two-way optical coupled switch circuit to link to each other with output terminal 1,2 pin of microcomputer chip to control circuit, the input end of its output termination two-way SCR control circuit, two groups of well heaters of output termination; The input end of automatic temperature control circuit links to each other with 5,6,7,8 pin of chip, and output terminal links to each other with thermistor; The full-automatic time control circuit that the microcomputer oscillation circuit that is made of microcomputer chip and the quartz crystal that links to each other with its input end 13,14 pin is formed.

2, micro computer full automatic temperature controller according to claim 1 is characterized in that described two-way SCR control circuit comprises No. one well heater SCR control circuit, its optocoupler pipe PC ₁6 pin pass through resistance R ₆, bidirectional triode thyristor TR ₃MT ₂The utmost point and contact H ₁Link to each other PC ₁4 pin of pipe pass through resistance R ₉An end and TR ₃Gate pole link to each other R ₉In addition end through MT ₁The utmost point and contact AC ₂Link to each other well heater Re ₁Be serially connected in H ₁And between Hc two contacts, optocoupler pipe PC ₁1 pin link to each other PC with contact VDD ₁2 pin by LED 5, R ₂₁Link to each other with 1 pin of chip; No. two well heater SCR control circuit, its well heater Re ₂Be serially connected in Hc and H ₂Between two contacts, contact H ₂By bidirectional triode thyristor TR ₄MT ₂The utmost point, resistance R ₇With optocoupler pipe PC ₂6 pin link to each other PC ₂4 pin pass through R ₁₀An end and TR ₄Gate pole link to each other R ₁₀In addition end pass through TR ₄MT ₁The utmost point and AC ₂Contact links to each other, optocoupler pipe PC ₂1 pin and VDD join PC ₂2 pin pass through LED ₆, R ₂₂Link to each other with 2 pin of chip.

3, micro computer full automatic temperature controller according to claim 1, it is characterized in that described automatic temperature control circuit comprises an output power initialization circuit and adjustment control circuit, wherein the output power initialization circuit is the potentiometer VR that is linked to each other with the Sc contact with VDD respectively by two ends ₂With VR ₃Form, the centre tap of its this two potentiometers links to each other trimmer potentiometer SM in the adjustment control circuit with 7,8 pin of chip respectively ₂One termination VDD, the other end is by last inclined to one side value resistance R ₁₉One the tunnel connects another road of 5 pin of chip through capacitor C ₂₁Link to each other with the Sc contact, constitute a circuit temperature-controlling circuit; The trimmer potentiometer SM that links to each other with VDD by an end ₁, the other end is by last inclined to one side value resistance R ₂₀One the tunnel links to each other with 6 pin of chip, and another road is through capacitor C ₂₂With contact S _CLinking to each other constitutes another circuit temperature-controlling circuit, two thermistor Rt in parallel ₁, Rt ₂One end links to each other with its contact Sc, the other end respectively with contact S ₁, S ₂Link to each other.

4, micro computer full automatic temperature controller according to claim 1, it is characterized in that described full-automatic time control circuit comprises a microcomputer chip and the oscillation circuit that constitutes microcomputer by 13,14 pin and the quartz crystal of chip, 3 pin of its chip pass through switch SW ₅Link to each other with the Sc contact, the VDD point passes through resistance R ₁₈, LED ₄Link to each other with 3 pin of chip, 11 pin, 12 pin link to each other with the VDD point, and 13 pin pass through capacitor C through an end of quartz crystal ₂₀With voltage stabilizing diode D ₁₂Anodal linking to each other, 14 pin pass through capacitor C through the other end of quartz crystal ₁₉With D ₁₂Anodal linking to each other, 18 pin are through LED ₃One end passes through switch SW ₃With D ₁₂Anodal linking to each other.

5, micro computer full automatic temperature controller according to claim 1 is characterized in that also comprising an electromagnetic wave control circuit, its resistance R ₂By potentiometer VR ₁, resistance R ₃Meet AC ₂Point, resistance R ₂Two groups of well heater R of an other termination _E1, R _E2Its contact Hc, potentiometer VR ₁Centre tap is by an end, the resistance R of LAMP lamp ₄Connect the ACG/G point, the other end of LAMP lamp passes through resistance R ₅Meet potentiometer VR ₁Shell forms control loop.

6, micro computer full automatic temperature controller according to claim 1, it is characterized in that described control circuit comprises that also an anion generator is made up of an astable circuit and 10 voltage doubling rectifing circuits, an end of the pulse transformer B input in its astable circuit passes through switch SW ₂Link to each other with direct supply, centre tap passes capacitor C ₄With C ₅Between node be plugged on resistance R ₁₅With triode TR ₁Between the collector, R ₁₅The other end and TR ₁Base stage and capacitor C ₃One end links to each other, TR ₁Emitter link to each other C with Vss ₃Another input end, the R of the other end by pulse transformer B ₁₆, C ₆An end and TR ₂Collector link to each other, emitter connects the Vss point, base stage is passed through C ₆, R ₁₆The other end, C ₅, C ₄And R ₁₅The other end be connected to TR ₁Base stage and C ₃Between; The output terminal of pulse transformer B links to each other with two input ends of 10 voltage doubling rectifing circuits respectively, a termination capacitor C ₈, end is through D in addition ₂One end and C ₁₇Link to each other, the output terminal of 10 voltage doubling rectifing circuits links to each other with the effluve pin.

7, micro computer full automatic temperature controller according to claim 1, it is characterized in that described control circuit also comprises a myriameter waves SCR control circuit, the end of its n electromagnetic induction coil Ln links to each other with its contact Hc, and the other end links to each other with contact c, optocoupler pipe PC ₃1 pin link to each other with contact VDD, 2 pin pass through LED ₇, resistance R ₂₃Link to each other with 4 pin of chip, 6 pin pass through resistance R ₈, bidirectional triode thyristor TR ₅MT ₂The utmost point links to each other with contact C, and gate pole is by an end and the optocoupler pipe PC of resistance R 11 ₃4 pin link to each other resistance R ₁₁The other end pass through TR ₅MT ₁The utmost point and AC ₂Link to each other.