CN103199776B - Direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber - Google Patents
Direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber Download PDFInfo
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- CN103199776B CN103199776B CN201310136587.4A CN201310136587A CN103199776B CN 103199776 B CN103199776 B CN 103199776B CN 201310136587 A CN201310136587 A CN 201310136587A CN 103199776 B CN103199776 B CN 103199776B
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Abstract
The invention discloses direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside a kind of air conditioning chamber, comprise fixed partial pressure circuit and fixed partial pressure point deenergizing; Fixed partial pressure circuit comprises resistance R 17, adjustable resistance ZW1, electric capacity EC6 and positive-negative-positive triode Q1; A fixed partial pressure point deenergizing comprises photoelectrical coupler U9; Triode Q1 is by connect+15V of resistance R 17 power supply, should+15V power supply and triode Q1 base stage between an electrochemical capacitor EC5 in parallel; One end after adjustable resistance ZW1 and electric capacity EC6 are connected in parallel is connected between resistance R 17 and triode Q1; Photoelectrical coupler U9 is connected with the basis set of triode Q1; Photoelectrical coupler U9 is also connected with the outdoor DC fan motor rotating-speed control circuit of air-conditioning system. Direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber of the present invention, having can be to any speed regulating control of indoor and outdoor fan electromotor, obtain better heating effect, can also improve the advantage such as safety in operation and reliability of outdoor motor.<!--1-->
Description
Technical field
The present invention relates to direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside a kind of air conditioning chamber.
Background technology
The heating capacity of constant speed air-conditioning and the noise problem of alternating current generator are perplexing technical staff in the industry always, make constant speedThe behaviour in service of air-conditioner is not fully up to expectations. Existing fixed speed air conditioner, it is indoor, outdoor fan motor mostly adopts and exchanges senseAnswer motor, and outdoor motor mostly is one grade of rotating speed control, although can there be stable turning under the rated power supply of 220V, 50HzSpeed, but along with the variation of voltage, also will there is fluctuation on a large scale in its rotating speed, while causing line voltage high, outdoor motor noiseExcessive; And in the time that line voltage is low, outdoor motor rotating speed is too low, radiating effect is poor. Though minority high energy efficiency fixed speed air conditioner blower fanSo adopted DC brushless motor, but often only outdoor fan motor adopt DC brushless motor, and its control is very simple, onlyProvide a fixing driving voltage to direct current generator. Cause the electromagnetic sound of common fixed speed air conditioner heating effect and alternating current generatorBe difficult to solve, even if the high energy efficiency constant speed air-conditioning of above-mentioned employing DC brushless motor is only also the entirety at constant speed air-conditioning alwaysIn efficiency, promote to some extent, and not fully up to expectations aspect heating effect, particularly high and low temperature heating effect, high temperature heats situationUnder, owing to having adopted the method control system load of opening outer blower fan, cause heating capacity fluctuation very large, heating effect is undesirable,And waste of energy is very big. In low-temperature heating situation, because outer blower fan adopts one grade of rotating speed, can not convert rotating speed, it is common fixed to causeThe low-temperature heating effect of speed air-conditioner is poor, and frosting is more, and the time that effectively heats is short. This situation has greatly affected air-conditioningThe result of use of result of use, particularly winter.
Summary of the invention
The present invention is the weak point existing in above-mentioned prior art for avoiding, and provides direct current generator outside a kind of air conditioning chamber to consolidateDetermine rotating speed and adjustable rotating speed commutation circuit, with the security of operation to any speed regulating control of outdoor fan motor, raising outdoor motorProperty and reliability.
The present invention be technical solution problem by the following technical solutions.
Direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber, its design feature is to comprise fixed partial pressureCircuit and fixed partial pressure are divided deenergizing; Described fixed partial pressure circuit comprises resistance R 17, adjustable resistance ZW1, electric capacity EC6 and positive-negative-positiveTriode Q1; A described fixed partial pressure point deenergizing comprises photoelectrical coupler U9; Described triode Q1 is by connect+15V of resistance R 17Power supply, an electrochemical capacitor EC5 in parallel between be somebody's turn to do+15V power supply and triode Q1 base stage; Described adjustable resistance ZW1 and electric capacity EC6 are alsoOne end after connection connects is connected between resistance R 17 and triode Q1, after described adjustable resistance ZW1 and electric capacity EC6 are connected in parallelOther end ground connection; An output of described photoelectrical coupler U9 is connected with the basis set of described triode Q1 by resistance R 18Connect, another output of described photoelectrical coupler U9 is by connect+15V of resistance R 20 power supply; One of described photoelectrical coupler U9Individual input end grounding, the outdoor DC fan motor rotating speed control of another input of described photoelectrical coupler U9 and air-conditioning systemCircuit processed is connected.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1) direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber of the present invention, due to outdoor fan electricityMachine has adopted DC brushless motor, because outdoor motor fixed partial pressure resistance has adopted adjustable resistance ZW1, makes it applicable to appointingThe system what rotating speed requires. Because fixed rotating speed and the adjustable rotating speed of outdoor motor control circuit of the present invention can arbitrarily switch, againCan be in the time that closed loop rotation speed control loop damage, outdoor fan continues normal work.
2) direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber of the present invention, due at fixed partial pressure electricityIn road, be provided with electrochemical capacitor EC5, make in the time switching on power, the motor driven voltage of fixed partial pressure circuit output is slowly executedBe added in outdoor motor MOTOR2 upper, to avoid damaging motor, solved common air-conditioning DC motor control circuit simple, motor is easyThe disadvantage of damaging, safety in operation and the reliability of raising outdoor motor.
Direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber of the present invention, make the output of fixed partial pressure circuitMotor driven voltage to be slowly applied to outdoor motor MOTOR2 upper, to avoid damaging motor, can be any to outdoor fan motorSpeed regulating control, obtains better heating effect, can also carry out arbitrarily the control of outdoor motor fixed rotating speed and closed-loop drive controlCollocation, improves the convenience of product development.
Brief description of the drawings
Fig. 1 is the refrigeration system schematic diagram of air-conditioning system of the present invention.
Fig. 2 is the indoor DC fan motor rotating-speed control circuit schematic diagram of air-conditioning system of the present invention.
Fig. 3 is outdoor DC fan motor rotating-speed control circuit schematic diagram A (the first circuit list of air-conditioning system of the present inventionUnit).
Fig. 4 is outdoor DC fan motor rotating-speed control circuit schematic diagram B (the second circuit list of air-conditioning system of the present inventionUnit).
Fig. 5 is outdoor direct current generator fixed rotating speed of the present invention and adjustable rotating speed commutation circuit schematic diagram.
Fig. 6 is that the indoor motor speed governing voltage Vsp1 of air-conditioning system of the present invention cuts off circuit theory diagrams.
Fig. 7 is that the outdoor motor speed governing voltage Vsp2 of air-conditioning system of the present invention cuts off circuit theory diagrams.
Fig. 8 is the temperature sensing circuit schematic diagram of the indoor coil of air-conditioning system of the present invention.
Fig. 9 is the overall control circuit schematic diagram of air-conditioning system of the present invention.
Figure 10 is the conversion chart of the outdoor motor temperature-rotation speed relation of air-conditioning system of the present invention.
Label in Fig. 1～Figure 10: 1 compressor, 2 outdoor unit heat exchangers, 3 aerofoil fans, 4 indoor set heat exchangers, 5 first maosTubule, 6 axial-flow fans, 7 cross valves, 8 electric heaters, 9 gas-liquid separators, 10 check valves, 11 first stop valves, 12 second cut-offsValve, 13 second capillaries.
Below pass through detailed description of the invention, and the invention will be further described by reference to the accompanying drawings.
Detailed description of the invention
Referring to Fig. 5, direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber, comprise fixed partial pressure circuit andFixed partial pressure is divided deenergizing; Described fixed partial pressure circuit comprises resistance R 17, adjustable resistance ZW1, electric capacity EC6 and positive-negative-positive triodeQ1; A described fixed partial pressure point deenergizing comprises photoelectrical coupler U9; Described triode Q1 is by connect+15V of resistance R 17 power supply,An electrochemical capacitor EC5 in parallel between be somebody's turn to do+15V power supply and triode Q1 base stage; Described adjustable resistance ZW1 and electric capacity EC6 are in parallel to be connectedOne end after connecing is connected between resistance R 17 and triode Q1, another after described adjustable resistance ZW1 and electric capacity EC6 are connected in parallelOne end ground connection; An output of described photoelectrical coupler U9 is connected with the basis set of described triode Q1 by resistance R 18, instituteState another output of photoelectrical coupler U9 by connect+15V of resistance R 20 power supply; One of described photoelectrical coupler U9 is defeatedEnter to hold ground connection, the outdoor DC fan motor rotating speed control electricity of another input of described photoelectrical coupler U9 and air-conditioning systemRoad is connected.
Fig. 5 is outdoor direct current generator fixed rotating speed and adjustable rotating speed commutation circuit, by fixed partial pressure circuit and fixed partial pressureDivide deenergizing to form. Described fixed partial pressure circuit is made up of resistance R 17, adjustable resistance ZW1, electric capacity EC6, positive-negative-positive triode Q1;Divide the executive component of deenergizing using photoelectrical coupler U9 as fixed partial pressure. In parallel between+15V power end and triode Q1 base stageAn electrochemical capacitor EC5, makes in the time switching on power, and makes the motor driven voltage of fixed partial pressure circuit output slowly be applied to chamberOuter motor MOTOR2 is upper, to avoid damaging motor. )
Direct current generator fixed rotating speed and adjustable rotating speed commutation circuit (Fig. 5) and Fig. 3, Fig. 4, Fig. 7 outside air conditioning chamber of the present inventionDeng the control circuit that has formed together complete outdoor motor MOTOR2, wherein the power supply of outdoor control panel is by indoor control panelThe control of outer blower fan signal control relay, dock to facilitate with common electric-controlled plate. CN2 in Fig. 3 and the CN4 in Fig. 4 have phaseCorresponding terminal, can link together two parts circuit diagram after corresponding terminal is connected, and in figure, two Node B are connectedConnect, three node C are connected, the circuit diagram of complete, as shown in Figure 9.
When the connector CN2 of indoor control panel is connected with the connector CN4 on outdoor control panel after connection, microcontroller U4The pwm pulse waveform of PWM mouth output, be connected to the 2nd pin (shown in Fig. 3) of photoelectrical coupler U5, light through phase inverter U3, R7Coupling U5 the 3rd pin output is connected to U9 (shown in Fig. 5) the 1st pin through R16, from U9 the 3rd pin output, gives electric capacity EC7 charging, makes three utmost pointsThe base voltage of pipe Q1 is higher than emitter voltage, and PN junction is reverse-biased, and triode Q1 ends, and has cut off the Vsp2 of outdoor motor MOTOR2Fixed partial pressure circuit.
DC brushless motor Air-condition system control circuit comprises microcontroller U4, indoor DC fan motor rotating speed control electricityRoad, outdoor DC fan motor rotating-speed control circuit, outdoor direct current generator fixed rotating speed of the present invention and adjustable rotating speed switch electricityRoad, indoor motor speed governing voltage cut off circuit, outdoor motor speed governing voltage cuts off circuit and temperature sensing circuit; Described indoor straightFlow fan motor rotation-speed control circuit, outdoor DC fan motor rotating-speed control circuit and temperature sensing circuit all with described micro-controlDevice processed is connected; Described indoor motor speed governing voltage cuts off circuit and is connected with described indoor DC fan motor rotating-speed control circuitConnect, described outdoor motor speed governing voltage cuts off circuit and outdoor direct current generator fixed rotating speed and adjustable rotating speed commutation circuit all and instituteStating outdoor DC fan motor rotating-speed control circuit is connected;
Described outdoor DC fan motor rotating-speed control circuit comprises the first circuit unit and second circuit unit, describedOne circuit unit comprises plug connector CN2, and described second circuit unit comprises plug connector CN4;
The circuit board of described DC brushless motor Air-condition system control circuit is divided into outdoor control panel and indoor control panel; InstituteState first of microcontroller U4, indoor DC fan motor rotating-speed control circuit, outdoor DC fan motor rotating-speed control circuitCircuit unit, indoor motor speed governing voltage cut off circuit and temperature sensing circuit is arranged on described indoor control panel, described chamberThe second circuit unit of outer DC fan motor rotating-speed control circuit, outdoor direct current generator fixed rotating speed and adjustable rotating speed switch electricityRoad and outdoor motor speed governing voltage cut off circuit and are arranged on described outdoor control panel; Described outdoor control panel and indoor control panelBetween be connected with plug connector CN4 by plug connector CN2.
DC brushless motor air-conditioning system comprises indoor set, off-premises station and control circuit, and its control circuit, comprises microcontrollerThe circuit such as device U4, brushless electric machine air-conditioning system outdoor motor control circuit of the present invention. The schematic diagram of indoor set and off-premises station is shown inShown in Fig. 1. Described indoor set comprises indoor set heat exchanger 4, electric heater 8 and axial-flow fan 6; One of described indoor set heat exchanger 4End is connected with the first stop valve 11, and the other end of described indoor set heat exchanger 4 is connected with the second stop valve 12;
Described off-premises station comprises outdoor unit heat exchanger 2, compressor 1, aerofoil fan 3, the first capillary 5, cross valve 7, gasLiquid/gas separator 9 and check valve 10; Described compressor 1 is connected with the first port of described cross valve 7, of described cross valve 7Two ports are connected with described the first stop valve 11, and the 3rd port of described cross valve 7 is connected with described gas-liquid separator 9,The 4th port of described cross valve 7 is connected with one end of described outdoor unit heat exchanger 2, another of described outdoor unit heat exchanger 2End is connected with one end of described the first capillary 5, one end phase of the other end of described the first capillary 5 and described check valve 10Connect, the other end of described check valve 10 is connected with described the second stop valve 12; One side setting of described outdoor unit heat exchanger 2There is aerofoil fan 3; The motor of the motor of described axial-flow fan 6 and described aerofoil fan 3 is brshless DC motor; Described indoorThe motor of axial-flow fan 6 of machine and the motor of the aerofoil fan of described off-premises station 3 are respectively by two control panel controls.
Described off-premises station also comprises the second capillary 13; Described check valve 10 is in parallel and is connected with the second capillary 13. AsFig. 1 is a kind of air-conditioning system of applying DC brushless motor of the present utility model, by indoor set, off-premises station, refrigeration system andCorresponding control circuit forms. When refrigeration, low pressure, low-temperature refrigerant steam in refrigeration system are sucked by compressor 1, compressedAfter superheated steam for high pressure, high temperature, drain into outdoor unit heat exchanger 2; The outdoor air that simultaneously outside fan 3 the sucks chamber of flowing throughOuter machine heat exchanger 2, takes away cold-producing medium liberated heat, makes the refrigerant vapour of high pressure, high temperature be condensed into highly pressurised liquid. High pressure liquidBody flows into indoor set heat exchanger 4 through the first capillary 5 step-down coolings, and evaporates under corresponding low pressure, draws ambient heat;Simultaneously indoor fan 6 constantly enters between the fin of indoor set heat exchanger 4 room air to carry out heat exchange, and by after heat releaseThe gas turning cold is sent to indoor. So, indoor-outdoor air constantly circulates, and reaches the object that reduces temperature. While heating, utilizeThe compression condensation heat of refrigeration system heats room air, low pressure, low-temperature refrigerant liquid evaporation endothermic in evaporimeter, andHigh-temperature high-pressure refrigerant gas is heat release condensation in condenser. When heating, heat pump changes the circulation of cold-producing medium by cross valve 7Direction, becomes the condenser while heating, originally refrigeration work as the indoor set heat exchanger of evaporimeter while making original refrigeration workThe outdoor unit heat exchanger of Shi Zuowei condenser becomes the evaporimeter while heating, and refrigeration system is in outdoor heat absorption like this, indoor heat release,The object that realization heats. Electric heater 8 is for as assisted heating device.
Indoor, outdoor fan all adopts DC brushless motor, by two control panel controls, by closed-loop control, makes respectivelyStable and the influence by voltage not of motor speed control, noise is little; High temperature heats, under low-temperature heating operating mode, air-conditioner heat effectFruit is better. Outdoor motor adopts independent control circuit, and the fixed rotating speed of outdoor motor and adjustable rotating speed can arbitrarily be switched,Again can be in the time that closed loop rotation speed control loop damage, outdoor fan continues normal work.
As the integrated circuit figure that Fig. 9 is control circuit of the present invention, the circuit diagram of Fig. 9 combines the circuit of Fig. 2～Fig. 8Figure, the circuit board of this control circuit is separated into two control panels: an indoor control panel and an outdoor control panel. To indoor,Outdoor fan motor all adopts DC brushless motor, and is provided with rotating-speed control circuit. When only needing outdoor motor, system adoptsDirect current generator and while only needing a fixed rotating speed, in original control system, then increases so outdoor control panel,Without former control system is done to any change, and because outdoor motor fixed partial pressure resistance has adopted adjustable resistance ZW1, make it canBe applicable to the system of any rotating speed requirement. And when so outdoor control panel being added to indoor control panel in the present invention and correspondingAfter line, can carry out the control of closed loop rotating speed to outdoor motor. Due to the fixed rotating speed of outdoor motor control circuit of the present invention andAdjustable rotating speed can arbitrarily switch, again can be in the time that closed loop rotation speed control loop damage, and outdoor fan continues normal work. Solve generalThe predicament of the corresponding a kind of new motor of system requirements of logical fixed speed air conditioner, make this invention control circuit applicability and canAssociativity is strengthened greatly, greatly shortens product development cycle, improves heating effect and job stability and reliability.
Described indoor DC fan motor rotating-speed control circuit comprises resistance R 1～R6, electric capacity EC1～EC2, capacitor C 1, anti-Phase device U3, photoelectrical coupler U1, photoelectrical coupler U2 and voltage-stabiliser tube Z1; The PWM output port of described microcontroller U4 is logical successivelyCross phase inverter U3 and be connected with the input of photoelectrical coupler U1 with resistance R 4, an output of described photoelectrical coupler U1 is logicalCross connect+15V of resistance R 3 power supply, another output of described photoelectrical coupler U1 is connected to turning of indoor DC fan motorVelocity modulation joint Vsp1 mouth, the link being in parallel between described capacitor C 1, electric capacity EC1, resistance R 1 and voltage-stabiliser tube Z1 after connectingBe connected between the rotational speed regulation Vsp1 mouth and photoelectrical coupler U1 of indoor DC fan motor, described capacitor C 1, electric capacity EC1,Another link ground connection being in parallel between resistance R 1 and voltage-stabiliser tube Z1 after connecting; The rotating speed of described indoor DC fan motorFeedback port FG1 is connected with an input of described photoelectrical coupler U2, another input of described photoelectrical coupler U2By connect+15V of resistance R 2 power supply; An output of described photoelectrical coupler U2 is connected with microcontroller U4 by resistance R 5Connect; One end that described resistance R 6 and electric capacity EC2 are in parallel after connecting is connected between resistance R 5 and microcontroller U4, described resistanceThe other end ground connection that R6 is in parallel after being connected with electric capacity EC2. Described indoor DC fan motor MOTOR1 and described indoor direct currentBetween fan motor rotational speed control circuit, be connected by plug connector CN1, on described CN1, include Vdm1, GND1, Vcc1,The splicing ear such as Vsp1 and FG1.
As shown in Figure 2, indoor DC fan motor rotating-speed control circuit, by speed feedback circuit and motor-drive circuit structureBecome. Speed feedback circuit is made up of elements such as resistance R 2, R5, R6, photoelectrical coupler U2 and electric capacity EC2. Motor-drive circuit bagDraw together the element compositions such as R1, R3, R4, photoelectrical coupler U1, electric capacity EC1, capacitor C 1, phase inverter U3 and voltage-stabiliser tube Z1.
Described speed feedback circuit is using the built-in Hall element of indoor DC fan motor as motor speed detection signal,The FG1 mouth of plug connector CN1 by indoor DC fan motor is sampled to photoelectrical coupler U2 input, through photoelectrical coupler U2Output, is input to microcontroller U4 via resistance R 5, R6, electric capacity EC2 composition signal transformation circuit. With phase inverter U3 and photoelectricity couplingClose device U1 as the executive component of controlling motor speed. The tach signal that microcontroller U4 basis detects, in real time regulation outputTo the pulse signal frequency of phase inverter U3. The pulse of photoelectrical coupler U1 output forms via resistance R 1, electric capacity EC1, C1 againSignal transformation circuit, forms motor driven voltage Vsp1 stably, is applied on indoor motor MOTOR1.
The PWM output port of microcontroller U4 is first exported the pwm pulse waveform of a little dutycycle, through phase inverter U3,By photoelectrical coupler, U1 exports, and the DC voltage that forms certain amplitude after resistance R 1, electric capacity EC1, C1 shaping filter is added to chamberThe rotational speed regulation Vsp1 mouth of interior motor M OTOR1, and it is electric to prevent that Vsp1 overtension from damaging at Vsp1 mouth, voltage-stabiliser tube Z1 to be setMachine. When after indoor fan motor running, 12 pulses of Hall element HALL output of electric machine built-in/turn, send into speed feedback mouthFG1, then through photoelectrical coupler U2 isolation output, be shaped as square wave by resistance R 5, R6, electric capacity EC2, send into microcontroller U4 outsideMiddle fracture, microcontroller U4 counts the pulse of sending into, thereby realizes the measurement to wind speed. And with microcontroller U4 insideThe umber of pulse of the corresponding rotating speed of setting compares, and adjusts the dutycycle of PWM ripple. Change by dutycycle can be controlled Vsp1The magnitude of voltage of mouth, thereby the rotating speed of motor M OTOR1 in control room.
The first circuit unit of described outdoor DC fan motor rotating-speed control circuit also comprises photoelectrical coupler U5, photoelectricityCoupler U6, resistance R 7～R9, phase inverter U3 and electric capacity EC3; The output of described photoelectrical coupler U5 and described plug connector CN2Terminal Vsp be connected, the input of described photoelectrical coupler U5 is connected to microcontroller by resistance R 7 and phase inverter U3 successivelyOn the PWM output port of device U4; Two inputs of described photoelectrical coupler U6 respectively with the terminal FG of described plug connector CN2 andTerminal OUT-is connected, and the output of described photoelectrical coupler U6 is connected with microcontroller U4 by resistance R 8; Described resistanceOne end that R9 and electric capacity EC3 are in parallel after connecting is connected between resistance R 8 and microcontroller U4, described resistance R 9 and electric capacity EC3The other end ground connection being in parallel after connecting;
The second circuit unit of described outdoor DC fan motor rotating-speed control circuit also comprises resistance R 11～R16, electric capacityEC4, capacitor C 2, photoelectrical coupler U7, photoelectrical coupler U8 and voltage-stabiliser tube Z2, described outdoor DC fan motor rotating speed control electricityThe second circuit unit on road is connected with described outdoor DC fan motor MOTOR2 by plug connector CN3; Described plug connector CN4Terminal Vsp be connected with the input of photoelectrical coupler U7 by resistance R 16, an output of described photoelectrical coupler U7By connect+15V of resistance R 14 power supply, another output of described photoelectrical coupler U7 is connected to outdoor DC fan motorRotational speed regulation Vsp2 mouth; The company being in parallel between described capacitor C 2, electric capacity EC4, resistance R 11 and voltage-stabiliser tube Z2 after connectingConnect end and be connected between the rotational speed regulation Vsp2 mouth and photoelectrical coupler U7 of outdoor DC fan motor, described capacitor C 2, electric capacityAnother link ground connection being in parallel between EC4, resistance R 11 and voltage-stabiliser tube Z2 after connecting; Described outdoor DC fan motorSpeed feedback mouth FG2 be connected with an input of photoelectrical coupler U8 by resistance R 13, described photoelectrical coupler U8'sAnother input connection+15V power supply; One end connection+15V power supply of described resistance R 12, the other end of described resistance R 12 connectsBe connected between the speed feedback mouth FG2 and described resistance R 13 of described outdoor DC fan motor; One of described photoelectrical coupler U8Individual output is by connect+15V of resistance R 15 power supply, another output of described photoelectrical coupler U8 and described plug connector CN4Terminal FG be connected.
As Fig. 3, Fig. 4 are respectively two circuit units of outdoor DC fan motor rotating-speed control circuit, these two circuitUnit has formed outdoor motor rotating-speed control circuit jointly, its basic control principle and the control of above-mentioned indoor DC fan motor rotating speedThe general principle of circuit processed is identical, and circuit structure is also similar. In order to make the present invention obtain better applicability, and by outdoor motorControl circuit is divided into indoor (i.e. the first circuit unit, shown in Fig. 3), outdoor (being second circuit unit, shown in Fig. 4) two parts,The respective terminal of the plug connector of two circuit units can realize the connection of circuit after connecting by wire.
The plug connector CN2 of described the first circuit unit and described second circuit unit comprise that plug connector CN4 includes 4 endsSon: Vsp, FG, OUT-and IN-. The terminal of the same names of these two plug connectors is connected by wire, can be by connectorCN2 is connected with CN4, thereby outdoor control panel can be connected with indoor control panel. The control of outdoor DC fan motor rotating speedCircuit, the sampling element using photoelectrical coupler U6, U8 that can Isolation input output as outdoor motor tach signal, with can be everyFrom photoelectrical coupler U5, the U7 of input/output terminal as the performer of rotating speed of controlling outdoor motor MOTOR2.
Described plug connector CN3 also comprises terminal Vdm2 and terminal GND2; Described terminal Vdm2 successively by diode D1 andFuse F1 is connected with+310V power supply, and described terminal GND2 is successively by LED 1 and resistance R 10 and+310VPower supply is connected. Can show by LED 1 whether outdoor motor MOTOR2 switches on power, by fuse F1 coupleOutdoor motor MOTOR2 implements protection.
Described indoor motor speed governing voltage cuts off circuit and comprises the first dividing potential drop shaping circuit, the first DC voltage testing circuitCut off circuit with Vsp1 voltage; The first dividing potential drop shaping circuit is made up of resistance R 21, resistance R 22 and electric capacity EC8; The first direct currentPress testing circuit to comprise voltage-stabiliser tube Z3, resistance R 23 and triode Q2; Vsp1 voltage cuts off circuit and comprises resistance R 24～R26, opensClose triode Q3, wherein switch triode Q3 cuts off the executive component of circuit as Vsp1 voltage.
Fig. 6 is that indoor motor MOTOR1 speed governing voltage Vsp1 cuts off circuit, forms the by resistance R 21, R22 and electric capacity EC8One dividing potential drop shaping circuit, via voltage-stabiliser tube Z3, triode Q2 conduct+310V voltage detector component. Using switch triode Q3 asVsp1 voltage cuts off the executive component of circuit. When prominent chance power-off, before the Vdm1 and the cut-out of Vcc1 voltage of motor M OTOR1, first cutDisconnected Vsp1 voltage, to protect indoor direct current generator MOTOR1 not damaged.
Described outdoor motor speed governing voltage cuts off circuit and comprises the second dividing potential drop shaping circuit, the second DC voltage testing circuitCut off circuit with Vsp2 voltage; The second dividing potential drop shaping circuit is made up of resistance R 27, resistance R 28 and electric capacity EC9; The second direct currentPress testing circuit to comprise voltage-stabiliser tube Z4, resistance R 29 and triode Q4; Vsp2 voltage cuts off circuit and comprises resistance R 30～R32, opensClose triode Q5, wherein switch triode Q5 cuts off the executive component of circuit as Vsp2 voltage.
Fig. 7 is that outdoor motor MOTOR2 speed governing voltage Vsp2 cuts off circuit, and its basic control principle is with indoor DC fanMotor rotation-speed control circuit. Via voltage-stabiliser tube Z4, triode Q4 conduct+310V voltage detector component. Do with switch triode Q5For the executive component of Vsp2 voltage cut-out circuit. When prominent chance power-off, cut off at Vdm2 and the Vcc2 voltage of outdoor motor MOTOR2Before, first cut off Vsp2 voltage, to protect outdoor direct current generator MOTOR2 not damaged.
Described temperature sensing circuit comprises thermistor RT1, divider resistance R33 and commutation capacitor EC10; Described temperature-sensitive electricityOne end connection+5V power supply of resistance RT1, the other end of described thermistor RT1 connects microcontroller U4; Described divider resistance R33And commutation capacitor EC10 be in parallel connect after one end be connected between described thermistor RT1 and microcontroller U4, described pointThe other end ground connection that piezoresistance R33 is in parallel after being connected with commutation capacitor EC10.
Fig. 8 is temperature sensing circuit, the coil temperature sensor RT1 of indoor machine evaporation is set, with described coil temperatureThe temperature detection signal of sensor RT1 is as the changeover control signal of outdoor motor different rotating speeds shelves.
Fig. 2 and Fig. 6 have formed complete indoor motor MOTOR1 control circuit, the A node in A node and Fig. 6 in Fig. 2Be connected. Normally in service when air-conditioning, dash forward while meeting the situation of power-off, due to the characteristic of Switching Power Supply, indoor motor MOTOR1'sThe Vc voltage of Vcc1 voltage and microcontroller U4 all can keep just can disappearing for several seconds, and the Vdm1 voltage of indoor motor MOTOR1Meeting slow decreasing, in these several seconds, declines because the decline of Vdm1 causes the rotating speed of indoor motor MOTOR1, thereby makes microcontrollerDevice U4 detects that the umber of pulse of the feedback of indoor motor MOTOR1 reduces, and microcontroller U4 can strengthen the dutycycle of output PWM ripple,Cause Vsp1 voltage to raise, abnormal duty very likely causes the driver module of direct current generator MOTOR1 inside to damageBad. And cut off circuit, effectively head it off by motor M OTOR1 speed governing voltage Vsp1 is set. As Vdm1 voltage+310VWhen normal, resistance R 21, R22 and electric capacity EC8 composition dividing potential drop shaping circuit, make voltage-stabiliser tube Z3, triode Q2 conducting, triodeQ3 cut-off, does not affect Vsp1 voltage, does not affect the normal work of motor. And in power-off, when+310V voltage drop is to a certain extentTime, the voltage of getting in resistance R 22 is during lower than the voltage stabilizing value of voltage-stabiliser tube Z3, triode Q2 cut-off, and triode Q3 saturation conduction,Before the Vc voltage dead electricity of the Vcc1 voltage of motor M OTOR1 and microcontroller U4, Vsp1 mouth voltage is led because triode Q3 is saturatedLogical, voltage drop is to 0V, thereby guarantee direct current generator MOTOR1 is not damaged.
Fig. 3, Fig. 4, Fig. 5, Fig. 7 formed the control circuit of complete outdoor motor MOTOR2, wherein outdoor control panelPower supply, by the outer blower fan signal control relay control of indoor control panel, is docked to facilitate with common electric-controlled plate. In Fig. 3CN2 has corresponding terminal with the CN4 in Fig. 4, after corresponding terminal is connected, two parts circuit diagram can be connected to oneRise, in figure, two Node B are connected, and three node C are connected, the circuit diagram of complete, as shown in Figure 9.
After outdoor control panel powers on, the connector CN4 on connector CN2 and the outdoor control panel of indoor control panel is notWhen connection, the bleeder circuit output voltage that+15V voltage forms via resistance R 17, adjustable resistance ZW1, electric capacity EC6 is to positive-negative-positiveThe emitter-base bandgap grading of triode Q1, the base stage of triode Q1 is passed through resistance R 18, R19 and electric capacity EC7 ground connection, PN junction positively biased, triode Q1 leadsLogical, the voltage that bleeder circuit is got is added to the Vsp2 mouth of outdoor motor MOTOR2, and motor M OTOR2 is turned round by a fixed rotating speed.+ 15V slowly charges to electric capacity EC5 by resistance R 18, R19, makes slowly conducting of triode Q1, is applied to the voltage of Vsp2 mouthSlowly increase, thereby make slowly at the uniform velocity starting of motor M OTOR2, the setting of electric capacity EC5, makes after Vsp2 voltage in motor M OTOR2Vdm2 and Vcc2 voltage apply, meet the control requirement of direct current generator, can effectively protect direct current generator MOTOR2 not damaged.The setting of adjustable resistance ZW1, can make outdoor control panel of the present invention adapt to the rotating speed of arbitrary system requirements, and needn't redesignControl panel and motor.
When the connector CN2 of indoor control panel is connected with the connector CN4 on outdoor control panel after connection, microcontroller U4The pwm pulse waveform of PWM mouth output, be connected to the 2nd pin (shown in Fig. 3) of photoelectrical coupler U5, light through phase inverter U3, R7Coupling U5 the 3rd pin output is connected to U9 (shown in Fig. 5) the 1st pin through R16, from U9 the 3rd pin output, gives electric capacity EC7 charging, makes three utmost pointsThe base voltage of pipe Q1 is higher than emitter voltage, and PN junction is reverse-biased, and triode Q1 ends, and has cut off the Vsp2 of outdoor motor MOTOR2Fixed partial pressure circuit.
Meanwhile, the pwm pulse waveform of the PWM mouth output of microcontroller U4, is connected to photoelectric coupling through phase inverter U3, R7The 2nd pin (shown in Fig. 3) of device U5, optocoupler U5 the 3rd pin output is connected to U7 (shown in Fig. 4) the 1st pin through R16, defeated from U7 the 3rd pinGo out, the DC voltage that forms certain amplitude after resistance R 11, electric capacity EC4, C2 (shown in Fig. 4) shaping filter is added to outdoor motorThe rotational speed regulation Vsp2 mouth of MOTOR2, and voltage-stabiliser tube Z2 is set to prevent Vsp2 overtension damage motor at Vsp2 mouth, work as chamberAfter external fan motor M OTOR2 running, built-in 12 pulses of Hall element HALL output of motor M OTOR2/turn, send into rotating speed anti-Feedback mouthful FG2, then isolate output through photoelectrical coupler U8 (shown in Fig. 4), U6 (shown in Fig. 3), by resistance R 8, R9, electric capacity EC3 (Fig. 3Shown in) be shaped as square wave, send into microcontroller U4 external interrupt mouth, microcontroller U4 counts the pulse of sending into, and carries outThe measurement of the rotating speed of outdoor fan motor MOTOR2, thereby the measurement of the wind speed of realization to outdoor fan. By outdoor fan motorThe umber of pulse of the corresponding rotating speed of the rotating speed of MOTOR2 and microcontroller U4 inner setting compares, and adjusts the dutycycle of PWM ripple.Can control the magnitude of voltage of Vsp2 mouth by the change of dutycycle, thus the rotating speed of control room external fan motor M OTOR2. Fig. 7 instituteShow, electric machine speed regulation voltage Vsp2 cuts off circuit, when power-off, before the Vdm2 and the cut-out of Vcc2 voltage of motor, first cuts off Vsp2 electricityPress, to protect direct current generator MOTOR2 not damaged.
Shown in Fig. 8, by coil temperature sensor is set on indoor set heat exchanger, 5V voltage is by NTC temperature-sensitiveResistance and R33 dividing potential drop, EC10 shaping, voltage stabilizing, be converted to voltage change by the variation of NTC thermistor RT1 resistance, output direct currentVoltage signal is to the AD mouth of microcontroller U4. Microcontroller U4 carrys out the indoor heat exchange of perception by AD conversion, collection to this voltageThe variation of actuator temperature, in air-conditioning heating situation, in the time that heat exchange temperature changes, according to temperature-rotating speed transformational relation table of Figure 10,Rotating speed to outdoor motor is controlled. In the time of temperature rise, while being more than or equal to T3, outdoor fan rotating speed is lowered one grade, extremelySP3, while being more than or equal to T5, outdoor fan rotating speed is lowered one grade again, and to SP2, while being more than or equal to T6, outdoor fan rotating speed is adjusted toSP1; In the time that temperature declines, while being less than T4, outdoor fan rotating speed raises one grade, and to SP2, while being less than T2, outdoor fan rotating speed againRaise one grade, to SP3, while being less than T1, outdoor fan rotating speed is adjusted to SP4.
In temperature rise process, if while being more than or equal to T7, for preventing that compressor from, because of high load capacity " chaser ", turn-offing chamberThe power supply of outer control panel, once turn-off after the power supply of outdoor control panel, for giving the time of a decline of system loading, needs to controlTemperature drops to while being less than or equal to T1, then allow outdoor control panel again electric, repeat above-mentioned wind speed control procedure.
In concrete enforcement, more gear outdoor motor rotating speed can also be set again, according to variations in temperature, in the time of low-temperature heating,Promote rotating speed, in the time that high temperature is processed, reduce rotating speed. Reach the time that always effectively heats while promoting low-temperature heating, promote high temperature and heatTime the object of heating capacity.
Split wall-mounted type air conditioner KFRd-32GW/051-N1, KFRd-32GW/052-N1, KFRd-32GW/053-N1,While experiment on KFRd-32GW/054-N1 (1 grade of efficiency, EER=3.6) type, indoor demonstration adopt respectively LED module,Two kinds of display modes of LED lamp. According to experiment, refrigeration system is used original KFRd-32GW/054-E1 (2 grades of efficiencies, EER=3.4) system, does not do to change. When normal work, outdoor motor MOTOR2 rotating speed is arranged on 820 revs/min, indoor fanMOTOR1, outdoor fan MOTOR2 all adopt DC brushless motor, adopt indoor, outdoor two control panels, and outdoor control panel is logicalThe outer blower fan control relay power supply of crossing indoor control panel, outdoor motor MOTOR2 carries out closed-loop control by indoor control panel,After preventing that closed-loop control circuit from damaging, air-conditioning cisco unity malfunction, adjusts the adjustable resistance ZW1 in fixed partial pressure circuit,Reach certain Vsp2 voltage, making fixed rotating speed is 820 revs/min.
Heat in process, in the time of temperature rise, while being more than or equal to 44 DEG C, outdoor fan rotating speed is lowered one grade, to 720 turning/Minute; While being more than or equal to 46 DEG C, outdoor fan MOTOR2 rotating speed is lowered one grade again, to 500 revs/min; While being more than or equal to 46 DEG C,Outdoor fan MOTOR2 rotating speed is adjusted to 300 revs/min; In the time that temperature declines, while being less than 45 DEG C, on outdoor fan MOTOR2 rotating speedAdjust one grade, to 500 revs/min; While being less than 43 DEG C, outdoor fan MOTOR2 rotating speed raises one grade again, to 700 revs/min; Be less than41 DEG C time, outdoor fan MOTOR2 rotating speed is adjusted to 820 revs/min.
In temperature rise process, if while being more than or equal to 50 DEG C, for preventing that compressor is because of high load capacity " chaser ", turn-offThe power supply of outdoor control panel, once turn-off after the power supply of outdoor control panel, for giving the time of a decline of system loading, needs controlTemperature processed drops to while being less than or equal to 41 DEG C, then allow outdoor control panel again electric, repeat above-mentioned wind speed control procedure.
Evidence, on the basis of former KFRd-32GW/054-E1 system, directly Energy Efficiency Ratio EER is risen to 3.6 withUpper, and by maximum heating capacity, by original average heating capacity 3200W, (while heating high load capacity, outer blower fan frequent start-stop, causes and heatsAmount fluctuation) bring up to 4600W. COP when high temperature heats is by originally significantly having improved winter heating's performance and environmental suitability.Product cost with do not adopt the KFRd-32GW/05-N1 type cost of direct current generator suitable, but reduced the volume of outer machine, reduceThe consumption such as copper, aluminium, all have very large improvement at packaging, cost of transportation, noise, aspect of performance. Marketing, respond well.
The invention is not restricted to the above description to embodiment, the content that those skilled in the art disclose according to the present invention,Improvement and the amendment that on basis of the present invention, needn't carry out through creative work all should be within protection scope of the present invention.
Claims (2)
1. direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber, is characterized in that, comprise fixed partial pressure circuit andFixed partial pressure is divided deenergizing; Described fixed partial pressure circuit comprises resistance R 17, adjustable resistance ZW1, electric capacity EC6 and positive-negative-positive triodeQ1; A described fixed partial pressure point deenergizing comprises photoelectrical coupler U9; Described triode Q1 is by connect+15V of resistance R 17 power supply,An electrochemical capacitor EC5 in parallel between be somebody's turn to do+15V power supply and triode Q1 base stage; Described adjustable resistance ZW1 and electric capacity EC6 are in parallel to be connectedOne end after connecing is connected between resistance R 17 and triode Q1, another after described adjustable resistance ZW1 and electric capacity EC6 are connected in parallelOne end ground connection; An output of described photoelectrical coupler U9 is connected with the base stage of described triode Q1 by resistance R 18, instituteState another output of photoelectrical coupler U9 by connect+15V of resistance R 20 power supply; One of described photoelectrical coupler U9 is defeatedEnter to hold ground connection, the outdoor DC fan motor rotating speed control electricity of another input of described photoelectrical coupler U9 and air-conditioning systemRoad is connected;
Described outdoor DC fan motor rotating-speed control circuit comprises the first circuit unit and second circuit unit, described the first electricityUnit, road comprises plug connector CN2, and described second circuit unit comprises plug connector CN4; Described the first circuit unit and described secondBetween circuit unit, be connected with plug connector CN4 by plug connector CN2; Described outdoor DC fan motor rotating-speed control circuitThe first circuit unit also comprises photoelectrical coupler U5, photoelectrical coupler U6, resistance R 7～R9, phase inverter U3 and electric capacity EC3; DescribedThe output of the pin 3 of photoelectrical coupler U5 is connected with the terminal Vsp of described plug connector CN2, described photoelectrical coupler U5'sThe input of pin 2 is connected on the PWM output port of microcontroller U4 by resistance R 7 and phase inverter U3 successively; Described photoelectricityTwo inputs of coupler U6 are connected with terminal OUT-with the terminal FG of described plug connector CN2 respectively, described photoelectric couplingThe output of device U6 is connected with central processing unit U4 by resistance R 8; After described resistance R 9 and electric capacity EC3 are in parallel and are connectedOne end is connected between resistance R 8 and microcontroller U4, the other end ground connection that described resistance R 9 is in parallel after being connected with electric capacity EC3;
The second circuit unit of described outdoor DC fan motor rotating-speed control circuit also comprise resistance R 11～R16, electric capacity EC4,Capacitor C 2, photoelectrical coupler U7, photoelectrical coupler U8 and voltage-stabiliser tube Z2, described outdoor DC fan motor rotating-speed control circuitSecond circuit unit is connected with described outdoor DC fan motor MOTOR2 by plug connector CN3; The end of described plug connector CN4Sub-Vsp is connected with the input of photoelectrical coupler U7 by resistance R 16, and an output of described photoelectrical coupler U7 passes throughConnect+15V of resistance R 14 power supply, another output of described photoelectrical coupler U7 is connected to turning of outdoor DC fan motorVelocity modulation joint Vsp2 mouth; The link being in parallel between described capacitor C 2, electric capacity EC4, resistance R 11 and voltage-stabiliser tube Z2 after connectingBe connected between the rotational speed regulation Vsp2 mouth and photoelectrical coupler U7 of outdoor DC fan motor, described capacitor C 2, electric capacity EC4,Another link ground connection being in parallel between resistance R 11 and voltage-stabiliser tube Z2 after connecting; Turning of described outdoor DC fan motorSpeed feedback port FG2 is connected with an input of photoelectrical coupler U8 by resistance R 13, another of described photoelectrical coupler U8Individual input connection+15V power supply; One end connection+15V power supply of described resistance R 12, the other end of described resistance R 12 is connected toBetween the speed feedback mouth FG2 and described resistance R 13 of described outdoor DC fan motor; One of described photoelectrical coupler U8 is defeatedGo out end by connect+15V of resistance R 15 power supply, another output of described photoelectrical coupler U8 and the end of described plug connector CN4Sub-FG is connected.
2. direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber according to claim 1, is characterized in that,Described plug connector CN3 also comprises terminal Vdm2 and terminal GND2; Described terminal Vdm2 is successively by diode D1 and fuse F1Be connected with+310V power supply, described terminal GND2 is connected with+310V power supply by LED 1 and resistance R 10 successivelyConnect.
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| CN103199776B true CN103199776B (en) | 2016-05-25 |
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| CN104728148A (en) * | 2013-12-24 | 2015-06-24 | 罗禛美 | Control system and method for intelligent energy-saving fan |
| CN105042766B (en) * | 2015-06-29 | 2017-09-15 | 美的集团武汉制冷设备有限公司 | Method for controlling outdoor fan of air-conditioner and control device |
| CN106054077A (en) * | 2016-07-08 | 2016-10-26 | 珠海格力电器股份有限公司 | Speed regulation voltage switching circuit and power strip |
| CN107062518B (en) * | 2017-01-09 | 2020-02-07 | 广东美的制冷设备有限公司 | Air conditioner control method and control device |
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| US6695046B1 (en) * | 1997-02-18 | 2004-02-24 | Hoffman Controls Corp. | Variable speed fan motor control for forced air heating/cooling system |
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| CN203166817U (en) * | 2013-04-18 | 2013-08-28 | 中国扬子集团滁州扬子空调器有限公司 | Fixed rotating speed and adjustable rotating speed switching circuit of outdoor direct-current motor of air conditioner |
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| US6695046B1 (en) * | 1997-02-18 | 2004-02-24 | Hoffman Controls Corp. | Variable speed fan motor control for forced air heating/cooling system |
| CN1477471A (en) * | 2002-08-23 | 2004-02-25 | 全汉企业股份有限公司 | Fan rotating speed contral circuit |
| CN200983567Y (en) * | 2006-08-04 | 2007-11-28 | 李劲 | High current brushless electromotor controller |
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Address after: 239000 No. 585, Shanghai Road, Chengdong Industrial Park, Chuzhou economic and Technological Development Zone, Anhui Patentee after: Anhui Yangzi Air Conditioning Co., Ltd Address before: 239000 No. 585, Shanghai Road, Chengdong Industrial Park, Chuzhou economic and Technological Development Zone, Anhui Patentee before: CHINA YANGZI GROUP CHUZHOU YANGZI AIR CONDITIONER Co.,Ltd. |
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