CN103162380B - Air conditioner, control circuit thereof and control method - Google Patents
Air conditioner, control circuit thereof and control method Download PDFInfo
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- CN103162380B CN103162380B CN201110428774.0A CN201110428774A CN103162380B CN 103162380 B CN103162380 B CN 103162380B CN 201110428774 A CN201110428774 A CN 201110428774A CN 103162380 B CN103162380 B CN 103162380B
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Abstract
The invention discloses an air conditioner, a control circuit of the air conditioner and a control method. The control circuit of the air conditioner comprises a bus communication circuit and a bus stealing circuit, wherein the bus communication circuit is connected between a main board of an internal machine and a main board of an external machine of the air conditioner for transferring a start-up control command sent by the main board of the internal machine to the main board of the external machine. The bus stealing circuit which is connected with the bus communication circuit for converting differential signals on the bus communication circuit into voltage signals when the bus communication circuit transmits data, wherein the voltage signals are served as start-up voltage of the main board of the external machine, and a power supply control circuit which is connected between the main board of the external machine and the power supply of an outdoor unit for connecting the main board of the external machine and the power supply of the outdoor unit after the main board of the external machine starts up and disconnecting them when the main board of the external machine stands by. According to the air conditioner, the control circuit of the air conditioner and the control method, power consumption for starting the external machine of the air conditioner can be reduced, and the stand-by power consumption of the air conditioner is reduced.
Description
Technical field
The present invention relates to appliance field, in particular to a kind of air-conditioner and control circuit thereof and control method.
Background technology
At present, general commercial air conditioner indoor and outdoor machine has control panel, in order to indoor set mainboard can mainboard outside control room in real time, to control outer machine load, off-premises station mainboard is under any circumstance all charged, and energy consumption is large, power consumption is higher, waste electric energy, also cannot meet the standby requirement of outlet 1W.
Large for the outer mainboard stand-by power consumption of air-conditioner in correlation technique, to waste electric energy problem, not yet proposes effective solution at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioner and control circuit thereof and control method, and to solve, air conditioner external mainboard power consumption is large, the problem of waste electric energy.
To achieve these goals, according to an aspect of the present invention, a kind of control circuit of air-conditioner is provided.
Control circuit according to air-conditioner of the present invention comprises: bus communication circuit, is connected between the interior mainboard of air-conditioner and outer mainboard, transfers to outer mainboard for the start control command interior mainboard sent; Bus stealing circuit, is connected with bus communication circuit, for when bus communication circuit transmits data, the differential signal on bus communication circuit is converted to voltage signal, and wherein, voltage signal is used for the start voltage as outer mainboard; And power control circuit, be connected between outer mainboard and the power supply of off-premises station, after mainboard start outside, connect the power supply of outer mainboard and off-premises station, when mainboard is standby outside, disconnect the power supply of outer mainboard and off-premises station.
Further, bus stealing circuit comprises: rectification circuit, is connected with bus communication circuit, for carrying out rectifier output voltage signal to the differential signal on bus communication circuit; And voltage conversion circuit, first end is connected with rectification circuit, and the second end connects outer mainboard, and the voltage signal for being exported by rectification circuit is converted to the voltage signal that outer mainboard starts.
Further, bus stealing circuit also comprises: normally closed switch circuit, and first end is connected with rectification circuit; First filter circuit, first end is connected with the second end of normally closed switch circuit, and the second end of the first filter circuit is connected with the first end of voltage conversion circuit; Second filter circuit, first end is connected with the second end of voltage conversion circuit, and the second end of the second filter circuit connects outer mainboard.
Further, normally closed switch circuit comprises: the first switching tube, first end ground connection, the outer mainboard of the second termination; Normally closed relay, comprises contact switch and coil, and wherein, the first end of coil is connected with the 3rd end of the first switching tube, and the second end of coil connects voltage conversion circuit, and the first end of contact switch connects rectification circuit; First diode, with the coils from parallel connection of coils of normally closed relay; And first electric capacity, with the coils from parallel connection of coils of normally closed relay.
Further, the first filter circuit second filter circuit and voltage conversion circuit comprise: inductance, and first end connects the second end of the contact switch of normally closed relay; Second diode, positive pole is connected with the second end of inductance; Boost control chip, the first pin is connected with the negative pole of the second pin with the second diode, and three-prong is connected to first node, the 4th pin ground connection, and wherein, first node is the node between inductance and the second diode; Step-down control chip, the first pin ground connection, the second pin is for connecting outer mainboard, and three-prong is connected with the negative pole of the second diode; Second electric capacity, first end is connected to Section Point, the second end ground connection, and wherein, Section Point is the node between inductance and the contact switch of normally closed relay; 3rd electric capacity, first end is connected to the 3rd node, the second end ground connection, and wherein, the 3rd node is the node between the second electric capacity and inductance; 4th electric capacity, first end is connected with the negative pole of the second diode, the second end ground connection; 5th electric capacity, first end is connected to the 4th node, the second end ground connection, and wherein, the 4th node is the node between step-down control chip and the second diode, and the first end of the 5th electric capacity also connects the coil of normally closed relay; 6th electric capacity, first end is connected to the 5th node, the second end ground connection, and wherein, the 5th node is the node between step-down control chip and outer mainboard; And the 7th electric capacity, first end is connected to the 6th node, the second end ground connection, and wherein, the 6th node is the node between the 6th electric capacity and outer mainboard.
Further, power control circuit comprises: second switch pipe, first end ground connection, the outer mainboard of the second termination; Normally opened relay, comprises contact switch and coil, and wherein, the first end of coil is connected with the 3rd end of second switch pipe, and the second end of coil connects power supply, and the first end of contact switch connects the power supply of off-premises station, the outer mainboard of the second end junction chamber; 3rd diode, with the coils from parallel connection of coils of normally opened relay; And the 8th electric capacity, with the coils from parallel connection of coils of normally opened relay.
To achieve these goals, according to an aspect of the present invention, a kind of air-conditioner is provided.
Air-conditioner according to the present invention comprises: interior mainboard; Outer mainboard; For the power supply of powering for outer mainboard; And the control circuit of any one air-conditioner provided by the invention.
To achieve these goals, according to an aspect of the present invention, a kind of control method of air-conditioner is provided.
Control method according to air-conditioner of the present invention comprises: control the interior mainboard of air-conditioner via the outer mainboard transmission start control command of bus to air-conditioner; Obtain the differential signal in bus; Differential signal is converted to voltage signal, and wherein, voltage signal is used for the start voltage as outer mainboard; The start of outer mainboard is controlled by voltage signal; And after mainboard start outside, connect the power supply of outer mainboard and off-premises station, when mainboard is standby outside, disconnect the power supply of outer mainboard and off-premises station.
By the present invention, adopt and comprise with the control circuit of the air-conditioner of lower part: bus communication circuit, is connected between the interior mainboard of air-conditioner and outer mainboard, transfers to outer mainboard for the start control command interior mainboard sent; Bus stealing circuit, is connected with bus communication circuit, for when bus communication circuit transmits data, the differential signal on bus communication circuit is converted to voltage signal, and wherein, voltage signal is used for the start voltage as outer mainboard; And power control circuit, be connected between outer mainboard and the power supply of off-premises station, after mainboard start outside, connect the power supply of outer mainboard and off-premises station, when mainboard is standby outside, disconnect the power supply of outer mainboard and off-premises station, solve the problem that air conditioner external mainboard stand-by power consumption is large, waste electric energy, and then reach the power consumption reducing outer machine and start, make the effect that air-conditioner stand-by power consumption is low.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the theory diagram of the control circuit of air-conditioner according to a first embodiment of the present invention;
Fig. 2 is the theory diagram of the control circuit of air-conditioner according to a second embodiment of the present invention;
Fig. 3 is the elementary diagram of the bus communication circuit according to the embodiment of the present invention;
Fig. 4 is the elementary diagram of the bus stealing circuit according to the embodiment of the present invention;
Fig. 5 is the elementary diagram of the power control circuit according to the embodiment of the present invention; And
Fig. 6 is the flow chart of the control method of air-conditioner according to the embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Fig. 1 is the theory diagram of the control circuit of air-conditioner according to a first embodiment of the present invention, and as shown in Figure 1, this air-conditioner comprises: interior mainboard 20; Outer mainboard 40; For the power supply 60 of powering for outer mainboard, the i.e. power module of outer mainboard, the AC power of the external outside of this power module; And control circuit 80.
Wherein, control circuit 80 comprises: bus communication circuit 82; Bus stealing circuit 84 and power control circuit 86.
After air-conditioner in this embodiment powers on, outer mainboard 40 is given tacit consent to not charged, when the outer mainboard 40 of needs works, interior mainboard 20 sends start control command to bus communication circuit 82, namely send the data of certain hour continuously, the start control command that interior mainboard 20 sends is transferred to outer mainboard 40 by bus communication circuit 82.
In the transmitting procedure of data command, bus stealing circuit 84 steals bus current, and the differential signal on bus communication circuit 82 is converted to voltage signal, makes the start of outer mainboard.
After outer mainboard 40 is started shooting, send to power control circuit 86 and connect control signal, outer mainboard 40 is connected with the power supply 60 of off-premises station, outer mainboard 40 can proceed to and rely on own power source work, carry out normal operation mode, when needs proceed to standby mode, interior mainboard 20 outwards mainboard 40 sends instruction, send to power control circuit 86 after outer mainboard receives instruction and disconnect control signal, power control circuit 86 makes outer mainboard 40 disconnect with the power supply 60 of off-premises station, enter standby, the not power consumption of outer mainboard 40.
When needs wake outer mainboard normal operation input up, interior mainboard 20 continues to send start control command to bus communication circuit 82, by stealing technology, completes outer mainboard and starts and course of normal operation.
In this embodiment, outer mainboard acquiescence is not charged, starting, connecting own power source work, deenergization not power consumption time standby, thus reducing the power consumption of outer machine startup, make air-conditioner stand-by power consumption lower after starting when startup by stealing bus current.
Fig. 2 is the theory diagram of the control circuit of air-conditioner according to a second embodiment of the present invention, as shown in Figure 2, interior mainboard (not shown) is via 485 communicating circuits 82 (i.e. bus communication circuit) and MCU40 (i.e. outer mainboard) communication.In communication process, differential signal on 485 communicating circuits 82 is converted into voltage signal by rectifier bridge 841 (i.e. rectification circuit), input to booster circuit 847 (i.e. voltage conversion circuit) via normally closed relay 843 (i.e. normally closed switch circuit) and input filter circuit 845 (i.e. the first filter circuit), the voltage signal after booster circuit 847 boosts provides start voltage via filtering and the outside machine MCU40 of accumulator 849 (i.e. the second filter circuit).
After outer machine MCU40 starts shooting, connection control signal is sent to power control circuit (including normally opened relay 861 and external power source change-over circuit 863), MCU40 and external ac power source are connected, MCU40 can proceed to and rely on own power source work, carry out normal operation mode, when needs proceed to standby mode, interior mainboard sends instruction to MCU40, send to power control circuit after MCU40 receives instruction and disconnect control signal, power control circuit makes MCU40 and external ac power source disconnect, enter standby, MCU40 not power consumption.
Particularly, the elementary diagram of each several part circuit will hereafter specifically describe.
Fig. 3 is the elementary diagram of the bus communication circuit according to the embodiment of the present invention, as shown in Figure 3, this bus communication circuit, for RS485 communicating circuit, by pull-up resistor and the pull down resistor of RS485 transceiver MAX3082/SP485 and other necessity, realizes the communication of air-conditioner internal-external machine.
Fig. 4 is the elementary diagram of the bus stealing circuit according to the embodiment of the present invention, and as shown in Figure 4, rectification circuit is rectifier bridge D6, A, B holding wire of its input termination RS485 transceiver.Normally closed switch circuit comprises: the first switching tube Q2, normally closed relay U3, and the first diode D14 of protection normally closed relay U3 and the first electric capacity C21.Voltage conversion circuit comprises boost control chip U4 and step-down control chip V3, and the electronic devices and components of other necessity.Filter circuit and accumulator comprise different electric capacity.The concrete annexation of each electronic device is as follows:
The first end ground connection of the first switching tube Q2, the second end connects outer mainboard via resistance R6; The first end of normally closed relay U3 coil and the three-terminal link of the first switching tube Q2, the second end connects boost control chip U4 output, and the first end of normally closed relay U3 contact switch connects rectification circuit; First diode D14 and the first electric capacity C21 all with the coils from parallel connection of coils of normally closed relay U3.
Inductance L 1 first end connects the second end of the contact switch of normally closed relay U3; The positive pole of the second diode D1 is connected with the second end of inductance L 1; Boost control chip U4, be chosen as NCP1402 chip, its CE pin is connected with OUT pin, and be jointly connected to the negative pole of the second diode D1, LX pin is connected to the node between inductance L 1 and the second diode D1, GND pin ground connection, 5V voltage is exported after boosting via boost control chip U4, work for normally closed relay U3, second electric capacity C1 is in parallel with the 3rd electric capacity C2, be connected between normally closed relay U3 and boost control chip U4, filtering process is carried out to the signal inputed to before boost control chip U4.
Step-down control chip V3, is chosen as VOL_MC33269T, its GND pin ground connection, and IN pin is connected with the negative pole of the second diode D1, and exporting 5V voltage transitions after being boosted by boost control chip U4 is, after 3.3V voltage, input to outer mainboard via 3V3 pin; 4th electric capacity C6 is in parallel with the 5th electric capacity C7, and be connected between boost control chip U4 and step-down control chip V3, wherein the 5th electric capacity C7 is electrochemical capacitor, and boost control chip U4 relies on the 5th electric capacity C7 energy storage, as the working power of normally closed relay U3.6th electric capacity C10 is in parallel with the 7th electric capacity C8, is connected between step-down control chip V3 and outer mainboard, to the signal of telecommunication filtering process that step-down control chip V3 exports.
Fig. 5 is the elementary diagram of the power control circuit according to the embodiment of the present invention, and as shown in Figure 5, this circuit comprises: second switch pipe Q1, normally opened relay U2 and for the protection of the second switch pipe Q1 of normally opened relay U2 and the 3rd diode D15.
Wherein, the first end ground connection of second switch pipe Q1, the second end connects outer mainboard via resistance R5; The first end of normally opened relay U2 coil is connected with the 3rd end of second switch pipe Q1, and the second end connects 5V power supply, and the first end of contact switch connects the power supply of off-premises station, the outer mainboard of the second end junction chamber; The coils from parallel connection of coils of the 3rd diode D15, the 8th electric capacity C19 and normally opened relay U2.
The specific works process prescription of the bus stealing circuit shown in the bus communication circuit shown in Fig. 3, Fig. 4 and the source control circuit shown in Fig. 5 is as follows:
Step one: when just powering on, normally closed relay U3 adhesive, when air-conditioner system needs outer mainboard to run, indoor set mainboard sends communication data by RS485 bus, now A, B line exists differential signal, and this differential signal boosts as 5V power supply through NCP1402 after rectification circuit, and rely on the electrochemical capacitor C7 energy storage of rear end, as the working power of relay, 5V is 3.3V through power supply chip MC33269 step-down again, works for outer machine MCU.
Step 2: the normally opened relay U2 in adhesive Fig. 5 after outer machine MCU puts into operation, connects power supply, and outer mainboard can proceed to and rely on own power source work, and then the normally closed relay U3 in fragmentary 4.
Step 3: when air-conditioner complete machine needs to proceed to low power operation, indoor set mainboard sends standby command to off-premises station mainboard, after off-premises station mainboard receives standby command, normally opened relay U2 in Fig. 5 is disconnected, off-premises station power supply disconnects, outer machine MCU dead electricity does not work completely, and whole outer machine controller is not charged.
Step 4: when needs wake outer machine normal operation input up, perform an action same step one.
The present embodiment adopts bus stealing technology, after powering on, outer machine acquiescence is not charged, when the outer mainboard work of needs, interior mainboard sends certain hour data continuously to bus, outer mainboard steals bus current, after storage capacitor reaches certain voltage, outer machine MCU works, the power supply relay of the outer machine of adhesive, outer machine can proceed to and rely on own power source work, carry out normal operation mode, when needs proceed to standby mode, interior machine sends instruction, and outer mainboard disconnects the power supply relay on outer machine after receiving instruction, enter standby, the not power consumption of outer mainboard.
Fig. 6 is the flow chart of the control method of air-conditioner according to the embodiment of the present invention, and as shown in Figure 6, the method comprises following step S1021 to step S110:
Step S102: control the interior mainboard of air-conditioner via the outer mainboard transmission start control command of bus to air-conditioner, preferably, this bus adopts RS485 communicating circuit to realize, as shown in Figure 3.
Step S104: obtain the differential signal in bus, the differential signal in bus is converted to current signal by rectifier bridge by this step.
Step S106: differential signal is converted to voltage signal, wherein, voltage signal is used for the start voltage as outer mainboard, and the low-voltage that rectifier bridge exports, by voltage conversion chip, is carried out boost conversion by this step.
Step S108: the start being controlled outer mainboard by voltage signal.
Step S110: after mainboard start outside, connect the power supply of outer mainboard and off-premises station, when mainboard is standby outside, disconnect the power supply of outer mainboard and off-premises station, this step controls disconnection and the conducting of mainboard and power supply outside circuit realiration as shown in Figure 5 by outer mainboard.
In this embodiment, outer mainboard acquiescence is not charged, when starting, the differential signal in bus is converted to voltage, start to steal bus current, own power source work is connected after starting, deenergization not power consumption time standby, thus the power consumption reducing the startup of outer machine, make air-conditioner stand-by power consumption lower.
From above description, can find out, present invention achieves following technique effect: outer mainboard acquiescence is not charged, start by stealing bus current when starting, own power source work is connected after starting, deenergization not power consumption time standby, thus the power consumption reducing the startup of outer machine, make air-conditioner stand-by power consumption lower.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a control circuit for air-conditioner, is characterized in that, comprising:
Bus communication circuit, is connected between the interior mainboard of air-conditioner and outer mainboard, and the start control command for described interior mainboard being sent transfers to described outer mainboard;
Bus stealing circuit, be connected with described bus communication circuit, for when described bus communication circuit transmits data, the differential signal on described bus communication circuit be converted to voltage signal, wherein, described voltage signal is used for the start voltage as described outer mainboard; And
Power control circuit, be connected between described outer mainboard and the power supply of off-premises station, for after described outer mainboard start, connect the power supply of described outer mainboard and described off-premises station, when described outer mainboard is standby, disconnect the power supply of described outer mainboard and described off-premises station.
2. the control circuit of air-conditioner according to claim 1, is characterized in that, described bus stealing circuit comprises:
Rectification circuit, is connected with described bus communication circuit, for carrying out rectifier output voltage signal to the differential signal on described bus communication circuit; And
Voltage conversion circuit, first end is connected with described rectification circuit, and the second end connects described outer mainboard, and the voltage signal for being exported by described rectification circuit is converted to the voltage signal that described outer mainboard starts.
3. the control circuit of air-conditioner according to claim 2, is characterized in that, described bus stealing circuit also comprises:
Normally closed switch circuit, first end is connected with described rectification circuit;
First filter circuit, first end is connected with the second end of described normally closed switch circuit, and the second end of described first filter circuit is connected with the first end of described voltage conversion circuit;
Second filter circuit, first end is connected with the second end of described voltage conversion circuit, and the second end of described second filter circuit connects described outer mainboard.
4. the control circuit of air-conditioner according to claim 3, is characterized in that, described normally closed switch circuit comprises:
First switching tube (Q2), first end ground connection, outer mainboard described in the second termination;
Normally closed relay (U3), comprise contact switch and coil, wherein, the first end of described coil is connected with the 3rd end of described first switching tube (Q2), second end of described coil connects described voltage conversion circuit, and the first end of described contact switch connects described rectification circuit;
First diode (D14), with the coils from parallel connection of coils of described normally closed relay (U3); And
First electric capacity (C21), with the coils from parallel connection of coils of described normally closed relay (U3).
5. the control circuit of air-conditioner according to claim 4, is characterized in that, described first filter circuit, described second filter circuit and described voltage conversion circuit comprise:
Inductance (L1), first end connects the second end of the contact switch of described normally closed relay (U3);
Second diode (D1), positive pole is connected with the second end of described inductance (L1);
Boost control chip (U4), first pin is connected with the negative pole of the second pin with described second diode (D1), three-prong is connected to first node, 4th pin ground connection, wherein, described first node is the node between described inductance (L1) and described second diode (D1);
Step-down control chip (V3), the first pin ground connection, the second pin is for connecting described outer mainboard, and three-prong is connected with the negative pole of described second diode (D1);
Second electric capacity (C1), first end is connected to Section Point, the second end ground connection, and wherein, described Section Point is the node between the contact switch of described inductance (L1) and described normally closed relay (U3);
3rd electric capacity (C2), first end is connected to the 3rd node, the second end ground connection, and wherein, described 3rd node is the node between described second electric capacity (C1) and described inductance (L1);
4th electric capacity (C6), first end is connected with the negative pole of described second diode (D1), the second end ground connection;
5th electric capacity (C7), first end is connected to the 4th node, second end ground connection, wherein, described 4th node is the node between described step-down control chip (V3) and described second diode (D1), and the first end of described 5th electric capacity (C7) also connects the coil of described normally closed relay (U3);
6th electric capacity (C10), first end is connected to the 5th node, the second end ground connection, and wherein, described 5th node is the node between described step-down control chip (V3) and described outer mainboard; And
7th electric capacity (C8), first end is connected to the 6th node, the second end ground connection, and wherein, described 6th node is the node between described 6th electric capacity (C10) and described outer mainboard.
6. the control circuit of air-conditioner according to claim 1, is characterized in that, described power control circuit comprises:
Second switch pipe (Q1), first end ground connection, outer mainboard described in the second termination;
Normally opened relay (U2), comprise contact switch and coil, wherein, the first end of described coil is connected with the 3rd end of described second switch pipe (Q1), second end of described coil connects power supply, the first end of described contact switch connects the power supply of described off-premises station, and the second end connects described off-premises station mainboard;
3rd diode (D15), with the coils from parallel connection of coils of described normally opened relay (U2); And
8th electric capacity (C19), with the coils from parallel connection of coils of described normally opened relay (U2).
7. an air-conditioner, is characterized in that, comprising:
Interior mainboard;
Outer mainboard;
For the power supply of powering for described outer mainboard; And
The control circuit of the air-conditioner according to any one of claim 1 to 6.
8. a control method for air-conditioner, is characterized in that, comprising:
Control the interior mainboard of air-conditioner via the outer mainboard transmission start control command of bus to described air-conditioner;
Obtain the differential signal in described bus;
Described differential signal is converted to voltage signal, and wherein, described voltage signal is used for the start voltage as described outer mainboard;
The start of described outer mainboard is controlled by described voltage signal; And
After described outer mainboard start, connect the power supply of described outer mainboard and off-premises station, when described outer mainboard is standby, disconnect the power supply of described outer mainboard and described off-premises station.
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| CN201110428774.0A CN103162380B (en) | 2011-12-19 | 2011-12-19 | Air conditioner, control circuit thereof and control method |
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| CN201110428774.0A CN103162380B (en) | 2011-12-19 | 2011-12-19 | Air conditioner, control circuit thereof and control method |
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| CN106352477A (en) * | 2016-08-24 | 2017-01-25 | 珠海格力电器股份有限公司 | Communication method and device of air conditioner and air conditioner |
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| CN110774995B (en) * | 2019-10-31 | 2022-10-21 | 广东美的制冷设备有限公司 | Power supply device of vehicle-mounted air conditioner and vehicle-mounted air conditioner |
| CN111397180A (en) * | 2020-04-02 | 2020-07-10 | 珠海格力电器股份有限公司 | Low-power-consumption multi-split air conditioning unit control method and device and air conditioning unit |
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| KR20080035173A (en) * | 2006-10-18 | 2008-04-23 | 삼성전자주식회사 | Air conditioner and control method thereof |
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