CN104990197B - Air conditioner, outdoor unit and its electric power supply control system - Google Patents

Air conditioner, outdoor unit and its electric power supply control system Download PDF

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Publication number
CN104990197B
CN104990197B CN201510242905.4A CN201510242905A CN104990197B CN 104990197 B CN104990197 B CN 104990197B CN 201510242905 A CN201510242905 A CN 201510242905A CN 104990197 B CN104990197 B CN 104990197B
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China
Prior art keywords
module
switch
outdoor unit
power supply
control system
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CN201510242905.4A
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CN104990197A (en
Inventor
梁汝锦
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201510242905.4A priority Critical patent/CN104990197B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46Improving electric energy efficiency or saving

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention belongs to field of air conditioning, more particularly to a kind of air conditioner, outdoor unit and its electric power supply control system.In normal work, the communication signal current detected is converted into corresponding low and high level and exported to integration module by the communication check module in outdoor unit electric power supply control system, output voltage comes the break-make of controlling switch module, then switch module conducting, switch power module normal work after integration module is handled;Into after holding state, due to no communication signal current, then communication check module exports low level always, the voltage of integration module output is less than the conducting voltage of switch module, switch module is operated in cut-off state, then controlling switch power module does not also work, and whole air conditioner is in low-power consumption standby state, and the existing air conditioner powered by outdoor unit is solved well, and power consumption is too high, can not meet the technical problem of low energy consumption requirement when standby.

Description

Air conditioner, outdoor unit and its electric power supply control system
Technical field
The invention belongs to field of air conditioning, more particularly to a kind of air conditioner, outdoor unit and its electric power supply control system.
Background technology
At present, because countries in the world are progressively paid attention to environmental issue, the standby energy consumption requirement of higher standard is constantly released, because This each household electrical appliances producer all is being directed to reducing the standby energy consumption of household appliances.
For the transducer air conditioning of in the market, there are the most times in holding state, and stand-by power consumption It is higher.Air conditioner generally comprises indoor set and outdoor unit, and is typically to supply electricity to outdoor unit by indoor set, if entered to air conditioner Row low-power consumption standby is designed, it will usually by the way of indoor set carries out dump to outdoor unit, so that outdoor unit falls completely Electricity, so as to reduce the stand-by power consumption of outdoor unit.
But, if air conditioner is that the load (such as indoor fan, stepper motor) in power supply, indoor set is provided by outdoor unit There is provided power supply by outdoor unit, then indoor set and outdoor unit are set up by live wire, zero line, ground wire and signal wire and connected, indoor set and Outdoor unit is kept in communication by existing current loop communication circuit, and the master controller of indoor set is the main control part of air conditioner, The load of indoor set and outdoor unit is all controlled by the master controller of indoor set, and the control signal of indoor set load is by indoor set Master controller directly send, and the control letter of outdoor unit load (such as outdoor electric-controlled plate, compressor, four-way valve, outdoor fan) Number then sent by the master controller of indoor set by current-loop communication circuit to the master controller of outdoor unit, then by the master of outdoor unit Controller controls the operation that outdoor unit is loaded according to control signal.If it follows that the complete machine power supply of air conditioner is carried by outdoor unit For, then when complete machine is in holding state, the load in outdoor unit can cause air conditioner still in live line work state Because standby power is high, and low energy consumption requirement can not be met.
The content of the invention
In view of this, the purpose of the present invention is to be to provide a kind of air conditioner, outdoor unit and its electric power supply control system, it is intended to Solving the existing air conditioner powered by outdoor unit, power consumption is too high, can not meet the technical problem of low energy consumption requirement when standby.
In a first aspect, the electric power supply control system for the air-conditioner outdoor unit that the present invention is provided, connects with AC power, including it is whole Flow bridge, communication check module, integration module, switch module and switch power module;The power supply termination of the switch power module The feeder ear of the communication check module, the output end of the communication check module is connected with the input of the integration module, The control end of the output termination switch module of the integration module, the high potential termination switch electricity of the switch module The earth terminal of source module, the cold end ground connection of the switch module, the input positive pole of the switch power module connects described whole Flow the positive output end of bridge, the negative output end ground connection of the rectifier bridge.
During normal work, the communication signal current of the switch power module detected is converted into by the communication check module Corresponding low and high level exported to the integration module, and output voltage controls the switch after the integration module is handled The break-make of module, when the switch module is turned on, the then switch power module normal work;Into after holding state, by In no communication signal current, then the communication check module exports low level always, and the integration module output voltage is zero, The switch module is operated in cut-off state, and the switch power module does not also work, and whole air conditioner is in low-power consumption standby State.
Second aspect, the outdoor unit of air conditioner that the present invention is provided, including master controller, IPM modules and with the IPM The load of module connection, as an improvement, further comprises electric power supply control system as described above.
The third aspect, the present invention also provides a kind of air conditioner.The air conditioner includes indoor set and outdoor unit, and outdoor unit passes through Live wire, zero line and signal wire are communicated with indoor set.The outdoor unit except including master controller, IPM modules and with IPM moulds Outside the load of block connection, the electric power supply control system described in as above first aspect further comprises.
In summary, the present invention is provided air conditioner, outdoor unit and its electric power supply control system, it is outdoor in normal work The communication signal current detected is converted into corresponding low and high level and exported by the communication check module in machine electric power supply control system To integration module, output voltage carrys out the break-make of controlling switch module after integration module is handled, and switch module is turned on, then switched Power module normal work;Into after holding state, due to no communication signal current, then communication check module exports low always Level, the voltage of integration module output is less than the conducting voltage of switch module, and switch module is operated in cut-off state, then control is opened Powered-down source module does not also work, and whole air conditioner is in low-power consumption standby state, solves existing powered by outdoor unit well Air conditioner power consumption is too high, can not meet the technical problem of low energy consumption requirement when standby, and the cost of whole circuit design It is cheap, simple and easily realization.
Brief description of the drawings
Fig. 1 is the structured flowchart of the electric power supply control system of air-conditioner outdoor unit provided in an embodiment of the present invention;
Fig. 2 is the structural representation of the electric power supply control system for the air-conditioner outdoor unit that the preferred embodiment of the present invention is provided.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
Fig. 1 is the structured flowchart of the electric power supply control system of air-conditioner outdoor unit provided in an embodiment of the present invention;For the ease of Illustrate, illustrate only part related to the present embodiment, as shown in the figure:
The electric power supply control system of air-conditioner outdoor unit, connects with AC power AC, specifically includes:Rectifier bridge 10, communication inspection Survey module 20, integration module 30, switch module 40 and switch power module 50.The feeder ear BP/M of switch power module 50 connects The feeder ear VCC of communication check module 20, the output end of communication check module 20 is connected with the input of integration module 30, integration The control end of the output termination switch module 40 of module 30, the high potential of switch module 40 terminates the ground connection of switch power module 50 S pins are held, the cold end ground connection of switch module 40, the input positive pole P of switch power module 50 terminates the positive of rectifier bridge 10 Output end V+, the negative output end V- ground connection of rectifier bridge 10.
In the electric power supply control system normal work of the air-conditioner outdoor unit shown in Fig. 1, communication check module 20 will be detected To the communication signal currents of the feeder ear BP/M of switch power module 50 outputs be converted into corresponding low and high level, then export to product Sub-module 30, integration module 30 carries out the break-make that output voltage after voltage integrating meter accumulation process carrys out controlling switch module 40.Work as product When the voltage that sub-module 30 is exported is more than or equal to the conducting voltage of switch module 40, switch module 40 is turned on, Switching Power Supply mould The also normal work of block 50;Into after holding state, because the feeder ear BP/M of switch power module 50 does not have communication signal current Export, then communication check module 20 exports low level always, the voltage that integration module 30 is exported slowly is reduced to zero, switch module 40 Cut-off state is operated in, switch power module 50 does not also work, whole air conditioner is in low-power consumption standby state.
Fig. 2 shows the structural representation of the electric power supply control system for the air-conditioner outdoor unit that a preferred embodiment is provided, together Sample, for convenience of description, it illustrate only part related to the present embodiment.
As a preferred embodiment, rectifier bridge 10 can be full-bridge rectification, or halfwave rectifier.Specifically, rectification Bridge 10 is connected between AC power AC and switch power module 50, two of rectifier bridge 10 input termination AC power AC, whole The positive output end V+ of stream bridge 10 connects the input positive pole P ends of switch power module 50, the negative output end V- ground connection of rectifier bridge 10.
Further, as a preferred embodiment, communication check module 20 includes the first optocoupler IC1 and its peripheral circuit. Specifically, the anode of the first optocoupler IC1 transmitting terminal diodes meets the zero line N of AC power, the first optocoupler IC1 transmitting terminal diodes Negative electrode connect the input of signal conversion module, led to by the signal wire S and indoor set of signal conversion module output end Letter, the colelctor electrode of the first optocoupler IC1 receiving terminal triodes meets the feeder ear BP/M of switch power module 50, and the first optocoupler IC1 connects The transmitting of receiving end triode extremely the output end of communication check module 20, be connected with the input of integration module 30.
As a preferred embodiment, integration module 30 includes resistance R1 and electric capacity C1 in parallel;Resistance R1 and electric capacity C1 is total to The first end connect is also turned on the output end of letter detection module 20 and the control end of switch module 40, and resistance R1 and electric capacity C1 connect altogether The second end ground connection.
Further, when implementing, as illustrated, integration module 30 can also include resistance R2;Resistance R2 is concatenated Between the output end of communication check module 20 and the earth-free one end of resistance R1.
As a preferred embodiment, switch module 40 includes PNP type triode Q1 and its peripheral circuit.Specifically, positive-negative-positive Triode Q1 base stage is the control end of switch module 40, and the output end of integration module 30, the pole of NPN type three are connect by a resistance R3 Pipe Q1 current collection extremely the hot end of switch module 40, connect the earth terminal S pins of switch power module 50, NPN type triode The cold end of Q1 transmitting extremely switch module 40.
In fact, in specific implementation process, switch module 40 can also be made up of metal-oxide-semiconductor and its peripheral circuit.Specifically For, switch module 40 can include NMOS tube Q2 and its peripheral circuit;NMOS tube Q2 grid is the control of switch module 40 End, NMOS tube Q2 drain electrode is the hot end of switch module 40, connects the earth terminal S pins of switch power module 50, NMOS tube Q2 source electrode is the cold end of switch module 40.
The internal structure of switch power module 50 is not showed that in the present embodiment, actually any one switching power circuit Module is all desirable, as long as its positive output end V+, feeder ear BP/M for inputting positive pole P termination rectifier bridges 10 connect the first optocoupler Colelctor electrode, the earth terminal S pins of IC1 receiving terminal triodes connect the hot end of switch module 40.
On the other hand, the embodiment of the present invention also provides a kind of outdoor unit of air conditioner.The outdoor unit of the air conditioner passes through fire Line L, zero line N and signal wire S are communicated with indoor set, including master controller, IPM modules and be connected with IPM modules it is negative Carry etc., as an improvement, the outdoor unit also includes an electric power supply control system.The electric power supply control system includes rectifier bridge, communication check Module, integration module, switch module and switch power module.The feeder ear BP/M of switch power module connects letter detection module Feeder ear VCC, the output end of communication check module is connected with the input of integration module, the output termination switching molding of integration module The control end of block, the high potential of switch module terminates the earth terminal S pins of switch power module, the low potential termination of switch module Ground, the input positive pole P of switch power module terminates the positive output end V+ of rectifier bridge, the negative output end V- ground connection of rectifier bridge.
Finally, the embodiment of the present invention also provides a kind of air conditioner.The air conditioner includes indoor set and outdoor unit, also, makees To improve, the outdoor unit of the air conditioner is as described above, includes the outdoor unit of electric power supply control system.
In summary, air conditioner provided in an embodiment of the present invention, outdoor unit and its electric power supply control system, in normal work When, the communication signal current detected is converted into corresponding height electricity by the communication check module in outdoor unit electric power supply control system Flat output is to integration module, and output voltage carrys out the break-make of controlling switch module after integration module is handled, switch module conducting, Then switch power module normal work;Into after holding state, due to no communication signal current, then communication check module is always Low level is exported, the voltage of integration module output is less than the conducting voltage of switch module, and switch module is operated in cut-off state, then Controlling switch power module does not also work, and whole air conditioner is in low-power consumption standby state, solves well existing by outdoor Power consumption is too high, can not meet the technical problem of low energy consumption requirement when standby for the air conditioner that machine is powered, and whole circuit design It is with low cost, it is simple and easily realize.
It is worth noting that, in above-described embodiment, included unit is simply divided according to function logic, But above-mentioned division is not limited to, as long as corresponding function can be realized;In addition, the specific name of each functional unit Only to facilitate mutually distinguishing, the protection domain being not intended to limit the invention.
In addition, one of ordinary skill in the art will appreciate that realizing all or part of step in the various embodiments described above method It can be by program to instruct the hardware of correlation to complete, corresponding program can be stored in embodied on computer readable storage Jie In matter, described storage medium, such as ROM/RAM, disk or CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, although with reference to foregoing reality Apply example the present invention has been carried out relatively to be described in detail, for those skilled in the art, it still can be to foregoing each reality The technical scheme described in example is applied to modify or carry out equivalent substitution to which part technical characteristic.It is all the present invention Any modifications, equivalent substitutions and improvements made within spirit and principle etc., should be included in the scope of the protection.

Claims (7)

1. a kind of electric power supply control system of air-conditioner outdoor unit, connects with AC power, it is characterised in that the confession of the outdoor unit Electric control system includes:Rectifier bridge, communication check module, integration module, switch module and switch power module;
The feeder ear of the power supply termination communication check module of the switch power module, the output of the communication check module End is connected with the input of the integration module, the control end of the output termination switch module of the integration module, described The high potential of switch module terminates the earth terminal of the switch power module, and the cold end ground connection of the switch module is described The input positive pole of switch power module connects the positive output end of the rectifier bridge, the negative output end ground connection of the rectifier bridge;
The communication check module includes the first optocoupler and its peripheral circuit;
The anode of the first optocoupler transmitting terminal diode connects the zero line of AC power, the first optocoupler transmitting terminal diode Negative electrode connects other peripheral circuits, and the colelctor electrode of the first optocoupler receiving terminal triode connects the power supply of the switch power module End, the output end and the integration module of the extremely described communication check module of transmitting of the first optocoupler receiving terminal triode Input be connected;
During normal work, the communication signal current of the switch power module detected is converted into accordingly by the communication check module Low and high level export to the integration module, output voltage controls the switch module after the integration module is handled Break-make, when the switch module is turned on, the then switch power module normal work;Into after holding state, due to not having There is communication signal current, then the communication check module exports low level always, and the integration module output voltage is zero, described Switch module is operated in cut-off state, and the switch power module does not also work, and whole air conditioner is in low-power consumption standby state.
2. the electric power supply control system of air-conditioner outdoor unit as claimed in claim 1, it is characterised in that the integration module includes Resistance R1 and electric capacity C1 in parallel;
First end that the resistance R1 and the electric capacity C1 connect altogether is while connecing the output end of the communication check module and described opening The control end of module is closed, the second end ground connection that the resistance R1 and the electric capacity C1 connect altogether.
3. the electric power supply control system of air-conditioner outdoor unit as claimed in claim 2, it is characterised in that the integration module is also wrapped Include resistance R2;
The resistance R2 is serially connected between the output end of the communication check module and the resistance R1 ungrounded end.
4. the electric power supply control system of air-conditioner outdoor unit as claimed in claim 1, it is characterised in that the switch module includes NPN type triode and its peripheral circuit;
The base stage of the NPN type triode is the control end of the switch module, and the current collection of the NPN type triode is extremely described The hot end of switch module, the cold end of the extremely described switch module of transmitting of the NPN type triode.
5. the electric power supply control system of air-conditioner outdoor unit as claimed in claim 1, it is characterised in that the switch module includes NMOS tube and its peripheral circuit;
The grid of the NMOS tube is the control end of the switch module, and the drain electrode of the NMOS tube is the height of the switch module Potential end, the source electrode of the NMOS tube is the cold end of the switch module.
6. a kind of outdoor unit of air conditioner, including master controller, IPM modules and the load being connected with the IPM modules, it is special Levy and be, the outdoor unit also includes the electric power supply control system as described in claim any one of 1-5.
7. a kind of air conditioner, including indoor set and outdoor unit, it is characterised in that the outdoor unit is as claimed in claim 6 Outdoor unit.
CN201510242905.4A 2015-05-13 2015-05-13 Air conditioner, outdoor unit and its electric power supply control system Active CN104990197B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108800484B (en) * 2018-06-20 2020-07-03 广东美的制冷设备有限公司 Air conditioner power control circuit, controller and air conditioner
CN111509988A (en) * 2020-05-22 2020-08-07 宁波奥克斯电气股份有限公司 Low-power-consumption circuit system, control method, air conditioner and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1292077A (en) * 1997-12-29 2001-04-18 大金工业株式会社 Indoor-outdoor communication device in air-conditioner
CN201072207Y (en) * 2007-07-04 2008-06-11 珠海英伟特电子科技有限公司 Household and commercial DC frequency converting air-conditioner controller
CN101398214A (en) * 2007-09-26 2009-04-01 三洋电机株式会社 Communication control method of air conditioning system, air conditioning system and outdoor unit
CN203443031U (en) * 2013-08-13 2014-02-19 Tcl空调器(中山)有限公司 Low standby power consumption control circuit and air conditioner
CN104578799A (en) * 2014-12-25 2015-04-29 成都芯源系统有限公司 Switching power supply system and control circuit and control method thereof
CN104596049A (en) * 2014-12-26 2015-05-06 广东美的制冷设备有限公司 Current loop communication circuit and air conditioner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000205627A (en) * 1999-01-07 2000-07-28 Matsushita Electric Ind Co Ltd Waiting operation controller for air conditioner
JP5873966B2 (en) * 2011-06-17 2016-03-01 パナソニックIpマネジメント株式会社 Air conditioner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1292077A (en) * 1997-12-29 2001-04-18 大金工业株式会社 Indoor-outdoor communication device in air-conditioner
CN201072207Y (en) * 2007-07-04 2008-06-11 珠海英伟特电子科技有限公司 Household and commercial DC frequency converting air-conditioner controller
CN101398214A (en) * 2007-09-26 2009-04-01 三洋电机株式会社 Communication control method of air conditioning system, air conditioning system and outdoor unit
CN203443031U (en) * 2013-08-13 2014-02-19 Tcl空调器(中山)有限公司 Low standby power consumption control circuit and air conditioner
CN104578799A (en) * 2014-12-25 2015-04-29 成都芯源系统有限公司 Switching power supply system and control circuit and control method thereof
CN104596049A (en) * 2014-12-26 2015-05-06 广东美的制冷设备有限公司 Current loop communication circuit and air conditioner

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