CN1079149C - Microcomputer controller for frequency-conversion air-conditioning system - Google Patents
Microcomputer controller for frequency-conversion air-conditioning system Download PDFInfo
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- CN1079149C CN1079149C CN 98120150 CN98120150A CN1079149C CN 1079149 C CN1079149 C CN 1079149C CN 98120150 CN98120150 CN 98120150 CN 98120150 A CN98120150 A CN 98120150A CN 1079149 C CN1079149 C CN 1079149C
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Abstract
The present invention relates to a microcomputer controller of an air conditioner with variable frequency. The controller is composed of a control part of an indoor machine, a control part of an outdoor machine, and a remote controller, wherein the control part of the outdoor machine is provided with a defrosting electromagnetic valve, and an indoor fan is driven by a DC brushless motor of a non-position sensor; indoor control and outdoor control adopt a communication mode that the optical coupling of an electric current loop isolates strong electricity; a power source of the outdoor machine is controlled by a main control chip of the indoor machine; the remote controller is provided with an indoor temperature sensor and a low voltage detection circuit. The controller of the air conditioner of the present invention realizes the control of the high-efficient energy saving of the air conditioner with variable frequency, and the comfort ability of indoor environment.
Description
The present invention relates to a kind of microcomputer controller for frequency-conversion air-conditioning system, belong to technical field of automatic control.
In traditional frequency-conversion air-conditioning system, because two single-chip microcomputer distances of indoor and outdoor machine are far away, if the SCI with two single-chip microcomputers directly links to each other with lead, will introduce electromagnetic interference signal from this lead, and because of two leads will be closely parallel with the N and the L line of civil power inevitably, can provide approach for the introducing of some interference (as power frequency 50Hz noise), prevent electromagnetic interference so in the scheme of communication, must consider method such as isolation.
Traditional air-conditioning system indoor machine fan motor adopts tap single-phase AC motor or PG motor more.The tap single-phase AC motor switches by relay realizes motor gear box, its simplicity of design, and cost is very low, but the ac motor volume is bigger, and noise is bigger during running, and motor efficiency is low, and relay adhesive noise was bigger when wind speed switched.
The objective of the invention is to design a kind of microcomputer controller for frequency-conversion air-conditioning system, make the capacity variable range of controlled air-conditioning system wide, noise is low, vibration is little, realized the comfortableness control of the energy-efficient and indoor environment of frequency-conversion air-conditioning system.
The microcomputer controller for frequency-conversion air-conditioning system of the present invention's design, form by off-premises station control section, indoor set control section and liquid crystal remote controller three parts, the off-premises station control section comprises single-chip microcomputer, current transformer, temperature sensor, frequency-changeable compressor, rectification and power model and motor, and the indoor set control section comprises that single-chip microcomputer, temperature sensor, remote control receive power supply and telecommunication circuit.The off-premises station control section also comprises the defrosting magnetic valve, and the off-premises station control section also comprises dc brushless motor.Indoor set control section and off-premises station control section are the electric current loop communication, indoor control section single-chip microcomputer+5V power supply and off-premises station control section single-chip microcomputer+5V isolated from power, and the electric current loop power supply is made up of R130, VD110, D101, C123.Electric current loop and indoor and outdoor two single-chip microcomputer electric power systems are isolated and are made up of PC201, PC202, PC101, PC102 photoelectricity combined device.The power supply of off-premises station control section is by the Single-chip Controlling of indoor set control section, and control circuit comprises single-chip microcomputer IC201, driver IC 203 and function relay K 201.
In the air-conditioner controller of the present invention's design, remote controller comprises single-chip microcomputer IC1, LCD, operation keyboard, power amplifier and infrared emission, indoor temperature transmitter TH401 and battery voltage detection circuit, temperature sensor TH401 and single-chip microcomputer IC1, divider resistance R403 form indoor temperature measurement circuit, and battery voltage detection circuit comprises single-chip microcomputer IC1, Zener diode Z and divider resistance R401.
The microcomputer controller for frequency-conversion air-conditioning system of the present invention's design, the forceful electric power communication modes that has adopted electric current loop light mat to isolate between indoor set, the off-premises station has been eliminated the influence of electromagnetic interference to communication.Saved an Industrial Frequency Transformer and a rectifying and wave-filtering element that relative cost is very high, made two connections between the indoor unit and outdoor unit be reduced to one simultaneously.After adopting position-sensor-free DC Brushless Motor Control technology in the indoor set of the present invention, speed-regulating range width and position-sensor-free and non-damageable advantage that can abundant sharp DC Brushless Motor, realized infinitely variable speeds, low noise, the high-efficiency operation of air-conditioning system indoor set blower fan, its control accuracy and reliability are greatly improved.
Description of drawings:
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is an off-premises station control section circuit block diagram.
Fig. 3 is an off-premises station control section circuit diagram.
Fig. 4 is an indoor set control section circuit block diagram.
Fig. 5 is an indoor set control section circuit diagram.
Fig. 6 is the circuit diagram of indoor set control section to the control of off-premises station power supply.
Fig. 7 is indoor control section and outdoor control section communicating circuit figure.
Fig. 8 is remote controller temperature measurement circuit figure.
Fig. 9 is remote controller battery voltage detecting circuit figure.
Introduce content of the present invention below in detail.
As shown in Figure 1, the microcomputer controller for frequency-conversion air-conditioning system of the present invention's design, form by off-premises station control section, indoor set control section and liquid crystal remote controller three parts, the off-premises station control section comprises single-chip microcomputer (IC101), current transformer (A), temperature sensor, frequency-changeable compressor, rectification and power model and motor, and the indoor set control section comprises that single-chip microcomputer (IC102), temperature sensor, remote control receive power supply and telecommunication circuit.The off-premises station control section also comprises the defrosting magnetic valve, and the off-premises station control section also comprises dc brushless motor.Indoor set control section and off-premises station control section are the electric current loop communication, indoor control section single-chip microcomputer+5V power supply and off-premises station control section single-chip microcomputer+5V isolated from power, and the electric current loop power supply is made up of R130, VD110, D101, C123.Electric current loop and indoor and outdoor two single-chip microcomputer electric power systems are isolated and are made up of PC201, PC202, PC101, PC102 photoelectricity combined device.The power supply of off-premises station control section is by the Single-chip Controlling of indoor set control section, and control circuit comprises single-chip microcomputer IC201, driver IC 203 and function relay K 201.
Off-premises station control circuit block diagram as shown in Figure 2, the off-premises station control section is by single-chip microcomputer (IC101), current transformer (A), temperature sensor, power unit (B, D), communicating circuit (C), E
2Compositions such as PROM (E), relay.
AC220V, after the electrochemical capacitor C2 filtering, is connected on the SPM IPM (F) after rectifier bridge G rectification by CX1, CX2 input.Be also connected in addition in the input of power unit (B).On U, the V of the output connection three phase variable frequency compressor of IPM (F), the W terminal.
As can be seen from Figure 2, the core of monoblock off-premises station plate is single-chip microcomputer (IC101), and its input quantity has following: the 1. current signal that transmits of current transformer A; 2. three temperature sensor input quantities (T1, T2, T3); 3. the outer data storage E of sheet
2The data of PROM (E) are read in signal; 4. the signal of communicating circuit (C) receives.Output quantity has following: relay, K1-K5, E
2The PROM write signal, communication sends signal, and IPM drives signal.K1 is the starting resistance transfer relay.When powering on first, capacitor C 2 is uncharged, and the charging initial capacitance is equivalent to short circuit, and electric current is very big, can be damaged C2 and other elements as not limiting.So add the R1 limiting starting current.After operate as normal began, single-chip microcomputer switched R1 by closed K1.K2 is the defrosting electromagnetic valve switch, and K3 is the cross valve switch.K4, K5 are the outdoor fan switch.Single-chip microcomputer is according to environment and self system status decision electromagnetic valve switch and rotation speed of fan switching.The rotating speed of compressor is to be determined by the waveform frequency that IPM (F) exports.And the waveform frequency of IPM output is the drive control signal decision by single-chip microcomputer output.The driving power of IPM is provided by B, single-chip microcomputer+the 5V power supply provides by 5V voltage adjuster D, and C1, L3 are the harmonic correction device.
CN10, CN11 meet AC220V in the circuit diagram 3, DC-, DC-meet IPM (F), socket XS101 connects the defrosting magnetic valve, XS102 connects cross valve, and XS103 connects outdoor fan, and the XS104 machine of giving a dinner for a visitor from afar starts electric capacity, XS110 meets IPM and drives input, XS107 connects the press temperature sensor, and XS108 connects outdoor temperature sensor, and XS109 connects outdoor coil pipe used sensor.The current segment B control circuit of off-premises station adopts integrated power supply manager STR-D1706.Control mode adopts the RCC mode.Realize many winding outputs and isolation with high frequency transformer T102.5V voltage adjuster D adopts integrated three-terminal voltage-stabilizing circuit SI-3051N.E
2PROM (E) selects the 93C46 of atmel corp for use.The parameter of system and some information can be write easily and be read by single-chip microcomputer.Because electric going up needs to isolate between IPM and the single-chip microcomputer, so adopt the light mat TLP521-1 of TOSHIBA to be connected between single-chip microcomputer and XS110 in the circuit.The driving of relay on the plate and indicator lamp adopts MOTOROLA to drive chip MC1413 (IC102) in addition.
Indoor set control circuit block diagram and circuit diagram are respectively as shown in Figure 4 and Figure 5, the indoor set control section is by single-chip microcomputer (IC201), remote-control receiving circuit A, communicating circuit eeprom circuit C, indoor fan driving interface D (XS208), state indication EED (L4～L7), temperature sensor interface FXS210, power relay interface G (XS202) buzzer BZ and air door page or leaf sheet stepper motor interface XS203, XS204, XS205 forms.The required power supply of single-chip microcomputer and peripheral circuit is connected to indoor control panel by power panel through the XS208 interface, and power panel also is indoor dc fan power supply.
Single-chip microcomputer receives the command signal that remote controller transmits by infrared receiving unit A, reads E
2Data among the PROM (C), when not having catastrophe failure (non-shutdown cancellation fault) and operating mode command signal when confirming to start shooting last time and needing off-premises station to power on (" air-supply " operating mode does not need off-premises station to power on), single-chip microcomputer powers on to off-premises station by drive circuit IC203 and interface XS202 attracting electric relay K201.After powering on, the indoor and outdoor machine carries out communication, and off-premises station sends status information to indoor set, indoor set according to indoor temperature state synthetic determination after, allow the off-premises station working signal to outdoor transmission again.Simultaneously, indoor single-chip microcomputer (IC201) is also lighted the corresponding indicator lamp of L4～L7 according to integrated status; Send indoor fan by XS208 and drive signal and make the air-supply beginning, and according to remote controller signal decision wind speed and judge fault, the outer dynamo-electric source relay K 201 of disconnection chamber immediately, and light corresponding LED light prompting user.
Used indoor machine fan adopts the position-sensor-free DC Brushless Motor to drive in the air-conditioner controller of the present invention.Traditional air-conditioning system indoor machine fan motor adopts tap single-phase AC motor or PG motor more.The tap single-phase AC motor switches by relay realizes motor gear box, its simplicity of design, and cost is very low, but the ac motor volume is bigger, and noise is bigger during running, and motor efficiency is low, and relay adhesive noise was bigger when wind speed switched; The PG motor is the ac motor that single speed ac motor and velocity sensor is attached to one, can in limited scope, realize stepless speed regulation, but because velocity sensor generally adopts photoelectrical coupler or hall device, faults such as velocity sensor is malfunctioning easily take place behind long-play, and generate heat easily when low cruise, motor efficiency is low.After adopting position-sensor-free DC Brushless Motor Control technology, can make full use of speed-regulating range width and the position-sensor-free and the non-damageable advantage of DC Brushless Motor, realized infinitely variable speeds, low noise, the high-efficiency operation of air-conditioning system indoor set blower fan, its control accuracy and reliability are greatly improved.
The present invention has adopted the power supply of off-premises station by indoor set main control chip control method.Realize circuit as shown in Figure 6, it is made up of indoor single-chip microcomputer IC201, driver IC 203 and power relay K201.An I/O mouth among the IC201 is changed to output state, the signal of output control relay adhesive or disconnection.But this signal is not enough to promote power relay, so between single-chip microcomputer and relay, add driving stage IC203 again, IC203 can adopt triode or integrated drive chips, relay is switched on or switched off the AC power L line of off-premises station according to the signal of single-chip microcomputer IC201, thereby reaches the purpose in dynamo-electric source outside the indoor set control room.Because off-premises station must stand long-term capricious weather environment, so the fault rate that off-premises station is prone to is much larger than indoor set, both sides' contact realizes by the communication between the single-chip microcomputer, in case the indoor set single-chip microcomputer receives the catastrophe failure signal that off-premises station transmits, controller will disconnect the indoor set relay immediately, cut off the off-premises station power supply, avoid causing the accident.In addition, when working under air supply pattern as indoor set, do not need to the off-premises station power supply, indoor set avoids off-premises station to expend unnecessary electric energy not adhesive control relay.
Communication between the indoor unit and outdoor unit relies on two single-chip microcomputers to carry out serial communication, because two single-chip microcomputer distances of indoor and outdoor machine are far away, if the SCI with two single-chip microcomputers directly links to each other with lead, will introduce electromagnetic interference signal from this lead, and because of two leads will be closely parallel with the N and the L line of civil power inevitably, can provide approach for the introducing of some interference (as power frequency 50Hz noise), prevent electromagnetic interference so in the scheme of communication, must consider method such as isolation.The present invention has adopted the forceful electric power communication modes of electric current loop light-coupled isolation, has eliminated the influence of electromagnetic interference to communication.What this method was different with conventional way is that the direct step-down rectifier of employing civil power provides power supply for electric current loop, makes and can omit an Industrial Frequency Transformer and a rectifying and wave-filtering element that relative cost is very high, makes two connections between the indoor unit and outdoor unit be reduced to one simultaneously.The circuit of employing forceful electric power communication as shown in Figure 7.Indoor set+5V power-supply system and off-premises station+5V isolated from power.The electric current loop power supply is made of R130, VD110, D101, C123.Electric current loop and indoor and outdoor two single-chip microcomputer electric power systems are isolated by PC201, PC202, PC101, and the PC102 photoelectric coupling circuit is finished.R221, R220, R132, R129, R131 are current-limiting resistance.220V is indoor to become direct current after resistance R 130 step-down VD110 rectification C123 filtering, the voltage stabilizing value of Zener diode ZD101 can be selected according to the demand size of loop current.The transmission mouth tap light lotus root PC201 of indoor and outdoor microcontroller communication interface SCI and the light emitting diode of PC101, but control loop break-make; The receiving port of SCI connects the phototriode end of PC202 and PC102 respectively.Because the light emitting diode of PC202 and PC102 is serially connected on the electric current loop.So the make-and-break signal of electric current loop can pass to the communication that the SCI receiving port of single-chip microcomputer has been realized electric current loop.
The present invention is provided with temperature sensor in the remote controller leading edge.In common air-conditioning system, all be the temperature that the temperature that detected with return air sensor is represented the room, because return air temperature greater than indoor temperature, is used the return air temperature stands for room temperature, not only can make room temperature be lower than the setting room temperature, and can make air-conditioning system consume more electric energy.The present invention is provided with temperature sensor in the remote controller leading edge, and remote controller regularly sends room temperature information to indoor set, so the room temperature that air-conditioning system is controlled is an indoor air temperature, has avoided unnecessary energy loss simultaneously.Realize circuit as shown in Figure 8, by single-chip microcomputer IC1, temperature sensor TH401 and divider resistance R403 form.The A point meets V+ by sensor TH401, meets GND and joins with the road A/D input port of single-chip microcomputer IC1 by R403.When room temperature changes, the resistance respective change of TH401, A point current potential changes thereupon, Chip Microcomputer A/D mouth sampling A point voltage V
A, the respective compartments temperature is shown by the liquid crystal on the remote controller.
In the present invention, remote controller has adopted the design of low-voltage measuring ability.Its voltage detecting circuit as shown in Figure 9.The current potential constant (with V+ point for referencial use) that utilizes the stabilizing voltage characteristic of Zener diode Z that A is ordered.The supply voltage and the cell voltage of the corresponding single-chip microcomputer of the full scale of the A/D of single-chip microcomputer IC1.And the current potential that A is ordered is constant.When cell voltage changes, (current potential A/ cell voltage) changed like this, and this ratio just is the result of A/D conversion, software can calculate cell voltage according to this result.Remote controller has increased a kind of function of Nover practical, i.e. the battery low-voltage measuring ability.Along with the normal use of remote controller, the electric weight in the battery can reduce gradually, and it is more and more lower to show as cell voltage.Reduce to deficiency so that remote control distance can occur during the single-chip microcomputer operate as normal and shorten when battery electric quantity.Receive insensitive or maloperation.This moment, the remote controller outward appearance showed normally, but can not normally use, should more renew battery.But general remote controller can't the reminding user to replace battery under this state.Adopt among the design and detect cell voltage method detection electric weight, and remind the user by liquid crystal display.
Claims (2)
1, a kind of microcomputer controller for frequency-conversion air-conditioning system, form by off-premises station control section, indoor set control section and liquid crystal remote controller three parts, the off-premises station control section comprises single-chip microcomputer, current transformer, temperature sensor, frequency-changeable compressor, rectification and power model and motor, and the indoor set control section comprises that single-chip microcomputer, temperature sensor, remote control receive power supply and telecommunication circuit; It is characterized in that the off-premises station control section also comprises the defrosting magnetic valve, the off-premises station control section also comprises dc brushless motor; Described indoor set control section and off-premises station control section are the electric current loop communication, indoor control section single-chip microcomputer+5V power supply and off-premises station control section single-chip microcomputer+5V isolated from power, the electric current loop power supply is made up of R130, VD110, D101, C123, electric current loop and indoor and outdoor two single-chip microcomputer electric power systems are isolated and are made up of PC201, PC202, PC101, PC102 photoelectricity combined device: the power supply of described off-premises station control section is by the Single-chip Controlling of indoor set control section, and control circuit comprises single-chip microcomputer IC201, driver IC 203 and function relay K 201.
2, air-conditioner controller as claimed in claim 1, remote controller wherein comprises single-chip microcomputer IC1, LCD, operation keyboard, power amplifier and infrared emission, it is characterized in that also comprising indoor temperature transmitter TH401 and battery voltage detection circuit; Described temperature sensor TH401 and single-chip microcomputer IC1, divider resistance R403 form indoor temperature measurement circuit; Described battery voltage detection circuit comprises single-chip microcomputer IC1, Zener diode Z and divider resistance R401.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98120150 CN1079149C (en) | 1998-10-23 | 1998-10-23 | Microcomputer controller for frequency-conversion air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98120150 CN1079149C (en) | 1998-10-23 | 1998-10-23 | Microcomputer controller for frequency-conversion air-conditioning system |
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| Publication Number | Publication Date |
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| CN1213062A CN1213062A (en) | 1999-04-07 |
| CN1079149C true CN1079149C (en) | 2002-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 98120150 Expired - Fee Related CN1079149C (en) | 1998-10-23 | 1998-10-23 | Microcomputer controller for frequency-conversion air-conditioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436822C (en) * | 2004-07-15 | 2008-11-26 | 松下电器产业株式会社 | Sealed type electric compressor |
| CN101359826B (en) * | 2007-08-03 | 2013-04-10 | 苏州三星电子有限公司 | Communication protecting equipment |
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| CN100424431C (en) * | 2006-09-30 | 2008-10-08 | 四川长虹电器股份有限公司 | Cooling system for cold and hot water machine set with fan disc pipe |
| CN101858661A (en) * | 2010-05-26 | 2010-10-13 | 广东欧科空调制冷有限公司 | Worm type water-cooled cold water chiller and control method |
| CN102287889A (en) * | 2010-06-18 | 2011-12-21 | 苏州三星电子有限公司 | Air-conditioner standby regulating device |
| CN102538127B (en) * | 2010-12-23 | 2015-04-01 | 珠海格力电器股份有限公司 | Handheld adjusting device for inverter air conditioner and handheld adjusting system for same |
| CN103196212B (en) * | 2013-04-18 | 2015-09-09 | 中国扬子集团滁州扬子空调器有限公司 | Brushless electric machine air-conditioning system indoor motor control circuit |
| CN104776568A (en) * | 2015-03-25 | 2015-07-15 | 广州视源电子科技股份有限公司 | Variable-frequency air conditioner |
| CN106225105B (en) * | 2016-09-20 | 2022-03-01 | 广东美的制冷设备有限公司 | Current loop communication device and air conditioner |
| EP3586067A1 (en) | 2017-02-22 | 2020-01-01 | Johnson Controls Technology Company | Integrated smart actuator device |
| CN111006374A (en) * | 2019-12-16 | 2020-04-14 | 广东美的暖通设备有限公司 | Control method and device of air conditioner, air conditioner and computer readable storage medium |
| CN115773564A (en) * | 2022-06-23 | 2023-03-10 | 珠海格力电器股份有限公司 | Air conditioner control method, system, circuit, equipment and storage medium |
-
1998
- 1998-10-23 CN CN 98120150 patent/CN1079149C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436822C (en) * | 2004-07-15 | 2008-11-26 | 松下电器产业株式会社 | Sealed type electric compressor |
| CN101359826B (en) * | 2007-08-03 | 2013-04-10 | 苏州三星电子有限公司 | Communication protecting equipment |
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| Publication number | Publication date |
|---|---|
| CN1213062A (en) | 1999-04-07 |
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Granted publication date: 20020213 Termination date: 20111023 |