CN108709284A - The control method of indoor unit, air conditioner and indoor unit - Google Patents
The control method of indoor unit, air conditioner and indoor unit Download PDFInfo
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- CN108709284A CN108709284A CN201810305649.2A CN201810305649A CN108709284A CN 108709284 A CN108709284 A CN 108709284A CN 201810305649 A CN201810305649 A CN 201810305649A CN 108709284 A CN108709284 A CN 108709284A
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- power source
- main power
- indoor unit
- voltage
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides the control methods of a kind of indoor unit, air conditioner and indoor unit.Wherein, a kind of indoor unit, including：Electric expansion valve further includes：Detection module is connected with the control device of indoor unit, and the voltage of the main power source for detection control apparatus judges whether main power source powers off according to voltage；Charge-discharge modules are connected with detection module and control device respectively, for when main power source powers off, device power supply in order to control to close electric expansion valve so that control device generates first control signal according to first control signal；Wherein, when main power source power supply is normal, the direct current of output is used to charge for charge-discharge modules.The indoor unit of the offer of the present invention, indoors after the master control borad accident power-off of machine, pass through charge-discharge modules, standby voltage is provided for master control borad, and master control borad is made to enter power-down procedure, electric expansion valve is closed, to effectively avoid indoor machine evaporation from generating condensation, causes interior machine to drip, even result in the phenomenon that compressor liquid hammer and occur.
Description
Technical field
The present invention relates to air conditioner technical fields, in particular to a kind of indoor unit, a kind of air conditioner and a kind of room
The control method of interior machine.
Background technology
In convertible frequency air-conditioner, compressor operating requires the refrigerant flow for entering evaporator in high frequency or low frequency state
Difference requires the refrigerant flow into evaporator bigger when high frequency is run, and to evaporate rapidly, improves refrigerating capacity, soon
Speed reduces room temperature；In low-frequency operation, it is desirable that the refrigerant flow for entering evaporator is smaller, reduces refrigerating capacity, so as to
Maintain room temperature.Electric expansion valve is as restricting element, adjusting accurate height, power saving, refrigerant big with flow adjustment range
The advantages that being flowed with positive and negative both direction, meets the requirement of refrigerant flow variation, empty to farthest play frequency conversion
The advantage of tune improves cooling system amount.
But electric expansion valve is there are one apparent disadvantage, is exactly after power failure, motor can not drive valve back to again
Position aperture, and it is held in the aperture before having a power failure.This just leads to the problem of one, and after power failure, refrigerant is in air conditioner internal-external machine pressure
Under the action of force difference, continue to flow in the evaporator of interior machine, but air-conditioning internal machine wind turbine does not rotate after having a power failure, heat exchange rapidly becomes
Slowly, evaporator temperature rapidly reduces, and causes the steam condensation in evaporator surrounding air on evaporator wing page, forms water droplet drop
It falls on outside interior machine；And after having a power failure, evaporator may have a certain amount of liquid refrigerants, after unit is once again powered up startup, this portion
Divide liquid refrigerants to will produce compressor liquid hammer, reduces the compressor service life.
To avoid air conditioner that from cannot closing electric expansion valve after accidental power failure, individual air-conditioning products increase solenoid valve, i.e.,
Increase a switch.But solenoid valve normal use can expend a constant current and cost is not low.
Invention content
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an aspect of the invention to propose a kind of indoor unit.
Another aspect of the present invention is to propose a kind of air conditioner.
Another aspect of the present invention is to propose a kind of control method of indoor unit.
In view of this, the present invention proposes a kind of indoor unit, it is used for air conditioner, indoor unit to include：Electric expansion valve, it is indoor
Machine further includes：Detection module is connected with the control device of indoor unit, the voltage of the main power source for detection control apparatus, root
Judge whether main power source powers off according to voltage；Charge-discharge modules are connected with detection module and control device respectively, in main electricity
When source powers off, device is powered in order to control, so that control device generates first control signal, electronics is closed according to first control signal
Expansion valve；Wherein, when main power source power supply is normal, the direct current of output is used to charge for charge-discharge modules.
Indoor unit according to the present invention, including control device and the detection module and charge and discharge mould that are connected with control device
Block judges whether main power source powers off by the voltage of the main power source of detection module detection control apparatus with this, when main power source powers off
When, charge-discharge modules are in discharge condition, and device is powered in order to control, while detection module sends out main power source OFF to control device
Signal after control device receives main power source OFF signal, generates first control signal, to close electric expansion valve.In addition when
When main power source normal power supply, charge-discharge modules are in charged state, and the direct current of main power source output for charge-discharge modules for filling
Electricity.The indoor unit of the offer of the present invention, by increasing charge-discharge modules, in the main power source accident power-off for detecting control device
Afterwards, device provides required operating voltage in order to control, so that control device is closed electric expansion valve, to avoid indoor unit from evaporating
Device generates condensation, causes interior machine to drip, even results in the phenomenon that compressor liquid hammer and occur, improves the service life of compressor,
The indoor unit of the present invention can effectively reduce production cost, reduce small product size, reduce energy consumption without increasing solenoid valve simultaneously.
In the above-mentioned technical solutions, it is preferable that charge-discharge modules include：DC decompression power supply, is connected with control device,
For the direct current of the output of main power source to be down to charging voltage, charge for energy-storing container；Energy-storing container, with DC decompression power supply
It is connected, for storing electric energy.
In the technical scheme, in the main power source normal power supply of control device, the direct current of main power source output is for being
Charge-discharge modules charge, which first passes around DC decompression power supply and be depressured, then charge for energy-storing container, in this way
Pressure resistance of the charging voltage higher than energy-storing container is avoided to improve the reliability of product to effectively prevent energy-storing container to burn.
In any of the above-described technical solution, it is preferable that energy-storing container includes：Multiple capacitances being connected in series with, wherein each
Capacitance at least one first divider resistance in parallel.
In the technical scheme, energy-storing container is connected in series by multiple capacitances, and each capacitance parallel connection at least one first
Divider resistance may insure that the charging voltage of each capacitance is consistent in this way, avoid the voltage difference on each monomer capacitance larger,
Seriously affect performance and the service life of capacitance.Preferably, energy-storing container is connected in series by multiple super capacitors, and each super capacitor
A high-precision divider resistance in parallel, can accelerate charging rate, the charge and discharge number for increasing energy-storing container is not reduced in this way
Its life expectancy, and for complete machine, energy-storing container can be replaced to avoid frequent, to increase service life and the practicality of complete machine
Property.
In any of the above-described technical solution, it is preferable that detection module includes：Sampling unit, sampling unit include at least two
A second divider resistance, the voltage for acquiring main power source；Converting unit is connected with sampling unit, for by voltage from mould
Analog quantity is converted to digital quantity；Comparing unit is connected with converting unit, is used for the number of the digital quantity of voltage and predetermined threshold value
Amount is compared, and judges whether main power source powers off according to comparison result.
In the technical scheme, detection module is divided by two precision resisters, the voltage of main power source is acquired, by mould
Number conversion compared with voltage analog is switched to digital quantity, then digital quantity corresponding with pre-set threshold value, judges to lead according to comparison result
The line status of power supply.When judging main power source power-off, charge-discharge modules start to discharge, and are that the control device of indoor unit is powered,
Comparing unit can export main power source OFF signal to control device simultaneously, after control device receives main power source OFF signal, generate
First control signal, to close electric expansion valve；When judging that main power source power supply is normal, charge-discharge modules are in charged state,
The direct current of main power source output is charge-discharge modules charging, while comparing unit can export main power source ON signals, make indoor unit by
It is run according to normal condition.
In any of the above-described technical solution, it is preferable that charge-discharge modules further include：First switch, one end of first switch
It is connected with control device, the other end is connected with energy-storing container；One end of second switch, second switch is connected with energy-storing container
It connects, the other end is connected with control device；Wherein, when voltage is greater than or equal to predetermined threshold value, judgement main power source power supply is normal,
Then first switch is connected, and second switch cut-off, charge-discharge modules charge；And when voltage is less than predetermined threshold value, judgement
Main power source powers off, then first switch is ended, and second switch conducting, charge-discharge modules discharge.
In the technical scheme, charge-discharge modules further include first switch and the second switch, when the voltage of main power source is more than
Or when equal to predetermined threshold value, illustrate that main power source power supply is normal, charge-discharge modules are in charged state at this time, then first switch is led
Logical, second switch cut-off, the direct current exported from main power source charges by first switch and DC decompression power supply to energy-storing container.
When the voltage of main power source is less than predetermined threshold value, illustrating that main power source powers off, charge-discharge modules are in discharge condition at this time, then and first
Switch cut-off, second switch conducting, the voltage that energy-storing container provides is by second switch to control device.Skill through the invention
Art scheme, it is ensured that energy-storing container can provide required stand-by power supply for it, and make it after Electrical Control plate accident power down indoors
Close electric expansion valve, to prevent indoor unit from dripping, even compressor liquid hammer the phenomenon that occur.
In any of the above-described technical solution, it is preferable that first switch is the first diode, the anode of the first diode and control
Device processed is connected, and the cathode of the first diode is connected with energy-storing container；Second switch is the second diode, the second diode
Anode energy-storing container be connected, the cathode of the second diode is connected with control device.
In the technical scheme, first switch is the first diode, second switch is the second diode, and diode has single
The characteristic being conducted, by the way that the anode of the first diode is connected with control device, cathode and the energy storage of the first diode are held
Device is connected, and by the way that the anode energy-storing container of the second diode is connected, the cathode and control device of the second diode
It is connected, such main power source is when powering normal, the first diode current flow, the cut-off of the second diode, at charge-discharge modules
In charged state；And when the power-off of main power source, the first diode cut-off, the second diode current flow, charge-discharge modules are in
Discharge condition.Technical solution through the invention can contain the electric energy needed for indoor unit electric-controlled plate in charge-discharge modules always, and
It powers for it when Electrical Control plate powers off indoors, its is made to close electric expansion valve, to prevent indoor unit from dripping, even compressor
The phenomenon that liquid hammer, occurs.
In any of the above-described technical solution, it is preferable that indoor unit further includes：Pressure unit, pressure unit one end and second
Switch is connected, and the other end is connected with control device, is depressured for the discharge voltage to charge-discharge modules.
In the technical scheme, when second switch is connected, charge-discharge modules start to discharge, and are supplied to needed for control device
Operating voltage, meanwhile, discharge voltage can be depressured by pressure unit, with for corresponding component in control device
Operating voltage needed for providing.
In any of the above-described technical solution, it is preferable that discharge voltage includes：5V and/or 12V.
The invention also provides a kind of air conditioners, including electric expansion valve, further include：Such as any one of above-mentioned technical proposal
Indoor unit.
Air conditioner according to the present invention using the indoor unit of any one of such as above-mentioned technical proposal, therefore has the interior
The advantageous effect of machine whole, repeats no more.
The invention also provides a kind of control methods of indoor unit, are used for air conditioner, and indoor unit includes：Electric expansion valve,
Indoor unit further includes control device, and the charge-discharge modules being connected with control device, control method include：Detection control apparatus
Main power source voltage；Judge whether main power source powers off according to voltage；When judging main power source power-off, charge-discharge modules electric discharge,
First control signal is generated, according to first control signal, closes electric expansion valve.
The control method of indoor unit according to the present invention judges main electricity by the voltage of the main power source of detection control apparatus
Whether source powers off, and when main power source powers off, charge-discharge modules are in discharge condition, in order to control device power, control device according to
After receiving main power source OFF signal, first control signal is generated, to close electric expansion valve.In addition when judgement main power source just
Often when power supply, charge-discharge modules are in charged state, and the direct current of main power source output is used to charge for charge-discharge modules.Pass through this
The control method of invention, after detecting the main power source accident power-off of control device, by charge-discharge modules, device carries in order to control
For required operating voltage, control device is made to close electric expansion valve, to avoid indoor machine evaporation from generating condensation, caused
Interior machine, which drips, even results in the phenomenon that compressor liquid hammer occurs, and improves the service life of compressor, while the interior of the present invention
Machine can effectively reduce production cost, reduce small product size, reduce energy consumption without increasing solenoid valve.
In the above-mentioned technical solutions, it is preferable that the step of whether main power source powers off is judged according to voltage, is specifically included：Sentence
Whether power-off pressure is less than predetermined threshold value；When judging result is to be, judgement main power source power-off；And when judging result is no,
Judge that main power source power supply is normal.
In the technical scheme, by the way that the voltage of main power source to be compared with predetermined threshold value, when the voltage of main power source is high
When predetermined threshold value, then judge that main power source is normal；When the voltage on main power source be less than pre-set threshold value, then judge main power source power off,
Charge-discharge modules start to discharge, and provide control device of the 12V and/or 5V power supplys to indoor unit.
In any of the above-described technical solution, it is preferable that control method further includes：It is raw when judging that main power source power supply is normal
At second control signal, according to second control signal, machine normal operation under the current model in control sky.
In the technical scheme, when judging that main power source power supply is normal, indoor unit is run according to normal condition.
The additional aspect and advantage of the present invention will become apparent in following description section, or practice through the invention
Recognize.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the schematic block diagram of indoor unit according to an embodiment of the invention；
Fig. 2 shows the schematic diagrames of the indoor unit of a specific embodiment according to the present invention；
Fig. 3 shows the schematic diagram of the DC power supply of a specific embodiment according to the present invention；
Fig. 4 shows the schematic diagram of the energy-storing container of a specific embodiment according to the present invention；
Fig. 5 shows the schematic diagram of the voltage detection module of a specific embodiment according to the present invention；
Fig. 6 shows the flow diagram of the control method of indoor unit according to an embodiment of the invention；
Fig. 7 shows the flow diagram of the control method of indoor unit according to another embodiment of the invention.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Referring to the indoor unit and air conditioner in Fig. 1 to Fig. 5 descriptions according to some embodiments of the invention.
In one embodiment of the invention, as shown in Figure 1, the present invention proposes a kind of indoor unit, it is used for air conditioner, it should
Indoor unit includes：Electric expansion valve further includes：Detection module 10 is connected with the control device of indoor unit, for detecting control
The voltage of the main power source of device judges whether main power source powers off according to voltage；Charge-discharge modules 12, respectively with detection module 10 and
Control device is connected, for when main power source powers off, device power supply in order to control to be believed so that control device generates first and controls
Number, electric expansion valve is closed according to first control signal；Wherein, when main power source power supply is normal, the direct current of output is for being
Charge-discharge modules 12 charge.
Indoor unit 1 provided by the invention, including control device and the detection module 10 being connected with control device and charge and discharge
Electric module 12 judges whether main power source powers off with this, works as master by the voltage of the main power source of 10 detection control apparatus of detection module
When power cut-off, charge-discharge modules 12 are in discharge condition, and device is powered in order to control, while detection module 10 is sent out to control device
Go out main power source OFF signal, after control device receives main power source OFF signal, generates first control signal, it is swollen to close electronics
Swollen valve.In addition when main power source normal power supply, charge-discharge modules 12 are in charged state, and the direct current of main power source output is for being
Charge-discharge modules 12 charge.The indoor unit of the offer of the present invention is detecting control device by increasing charge-discharge modules 12
After main power source accident power-off, device provides required operating voltage in order to control, and control device is made to close electric expansion valve, to
It avoids indoor machine evaporation from generating condensation, causes interior machine to drip, even results in the phenomenon that compressor liquid hammer and occur, improve compression
The service life of machine, while the indoor unit of the present invention can effectively reduce production cost, reduce product body without increasing solenoid valve
Product reduces energy consumption.
In one embodiment of the invention, it is preferable that charge-discharge modules 12 include：DC decompression power supply is filled with control
It sets and is connected, for the direct current of the output of main power source to be down to charging voltage, charge for energy-storing container；Energy-storing container is and straight
Stream voltage dropping power supply is connected, for storing electric energy.
In this embodiment, in the main power source normal power supply of control device, the direct current of main power source output is used for fill
Discharge module 12 charges, which first passes around DC decompression power supply and be depressured, then charges for energy-storing container, in this way
Pressure resistance of the charging voltage higher than energy-storing container is avoided to improve the reliability of product to effectively prevent energy-storing container to burn.
In one embodiment of the invention, it is preferable that energy-storing container includes：Multiple capacitances being connected in series with, wherein often
A capacitance at least one first divider resistance in parallel.
In this embodiment, energy-storing container is connected in series by multiple capacitances, and at least one first point in parallel of each capacitance
Piezoresistance may insure that the charging voltage of each capacitance is consistent in this way, avoid the voltage difference on each monomer capacitance larger, sternly
Ghost image rings performance and the service life of capacitance.Preferably, energy-storing container is connected in series by multiple super capacitors, and each super capacitor is simultaneously
Join a high-precision divider resistance, charging rate can be accelerated in this way, the charge and discharge number for increasing energy-storing container does not reduce it
Life expectancy, and for complete machine, energy-storing container can be replaced to avoid frequent, to increase service life and the practicality of complete machine
Property.
In one embodiment of the invention, it is preferable that detection module 10 includes：Sampling unit, sampling unit include extremely
Few two the second divider resistances, the voltage for acquiring main power source；Converting unit is connected with sampling unit, is used for voltage
Digital quantity is converted to from analog quantity；Comparing unit is connected with converting unit, for by the digital quantity of voltage and predetermined threshold value
Digital quantity is compared, and judges whether main power source powers off according to comparison result.
In this embodiment, detection module 10 is divided by two precision resisters, the voltage of main power source is acquired, by mould
Number conversion compared with voltage analog is switched to digital quantity, then digital quantity corresponding with pre-set threshold value, judges to lead according to comparison result
The line status of power supply.When judging main power source power-off, charge-discharge modules 12 start to discharge, and are that the control device of indoor unit supplies
Electricity, while comparing unit can export main power source OFF signal to control device, after control device receives main power source OFF signal, give birth to
At first control signal, to close electric expansion valve；When judging that main power source power supply is normal, charge-discharge modules 12 are in charging shape
The direct current of state, main power source output charges for charge-discharge modules 12, while comparing unit can export main power source ON signals, make interior
Machine is run according to normal condition.
In one embodiment of the invention, it is preferable that charge-discharge modules 12 further include：First switch, first switch
One end is connected with control device, and the other end is connected with energy-storing container；Second switch, one end of second switch and energy-storing container
It is connected, the other end is connected with control device；Wherein, when voltage is greater than or equal to predetermined threshold value, judgement main power source power supply
Normally, then first switch is connected, and second switch cut-off, charge-discharge modules 12 charge；And when voltage is less than predetermined threshold value
When, judgement main power source powers off, then first switch is ended, and second switch conducting, charge-discharge modules 12 discharge.
In this embodiment, charge-discharge modules 12 further include first switch and the second switch, when the voltage of main power source is more than
Or when equal to predetermined threshold value, illustrate that main power source power supply is normal, charge-discharge modules 12 are in charged state at this time, then first switch is led
Logical, second switch cut-off, the direct current exported from main power source charges by first switch and DC decompression power supply to energy-storing container.
When the voltage of main power source is less than predetermined threshold value, illustrating that main power source powers off, charge-discharge modules 12 are in discharge condition at this time, then and the
One switch cut-off, second switch conducting, the voltage that energy-storing container provides is by second switch to control device.Through the invention
Embodiment, it is ensured that energy-storing container can provide required stand-by power supply for it, and make it after Electrical Control plate accident power down indoors
Close electric expansion valve, to prevent indoor unit from dripping, even compressor liquid hammer the phenomenon that occur.
In one embodiment of the invention, it is preferable that first switch be the first diode, the anode of the first diode with
Control device is connected, and the cathode of the first diode is connected with energy-storing container；Second switch is the second diode, the two or two pole
The anode energy-storing container of pipe is connected, and the cathode of the second diode is connected with control device.
In this embodiment, first switch is the first diode, second switch is the second diode, and diode has single-phase
The characteristic of conducting, by the way that the anode of the first diode is connected with control device, the cathode and energy-storing container of the first diode
It is connected, and by the way that the anode energy-storing container of the second diode is connected, cathode and the control device phase of the second diode
Connection, such main power source is when powering normal, the first diode current flow, the cut-off of the second diode, at charge-discharge modules 12
In charged state；And when the power-off of main power source, the first diode ends, the second diode current flow, at charge-discharge modules 12
In discharge condition.Embodiment through the invention can contain the electric energy needed for indoor unit electric-controlled plate in charge-discharge modules 12 always,
And power for it when Electrical Control plate powers off indoors, so that it is closed electric expansion valve, to prevent indoor unit from dripping, even compress
The phenomenon that machine liquid hammer, occurs.
In one embodiment of the invention, it is preferable that indoor unit 1 further includes：Pressure unit, pressure unit one end and the
Two switches are connected, and the other end is connected with control device, is depressured for the discharge voltage to charge-discharge modules 12.
In this embodiment, when second switch is connected, charge-discharge modules 12 start to discharge, and are supplied to needed for control device
Operating voltage, meanwhile, discharge voltage can be depressured by pressure unit, with for corresponding component in control device
Operating voltage needed for providing.
In one embodiment of the invention, it is preferable that discharge voltage includes：5V and/or 12V.
In one particular embodiment of the present invention, as shown in Figures 2 to 5, the present invention proposes a kind of indoor unit, is used for
Air conditioner, the indoor unit include two parts, are indoor unit electric-controlled plate and electric expansion valve stand-by power supply respectively.Wherein, electronics is swollen
Swollen valve stand-by power supply is divided into two function modules：
One is energy-storing container charge-discharge modules, including energy-storing container 20 and DC power supply 22.It is passed from indoor unit electric-controlled plate
The defeated main power voltage 12V to come charges by unilateral diode D1 and DC power supply 22 to energy-storing container 20, energy-storing container 20
Charging voltage be 10.8V, it is lower 1.2V than main power voltage 12V, wherein DC power supply 22 be BQ24640, corresponding circuit knot
Structure schematic diagram is as shown in figure 4, be mainly used for the voltage that main power source provides being depressured, so that charging voltage is in energy-storing container
In pressure-resistant range；After main power source 12V is powered off, energy-storing container 20 exports 10.8V and 5V power supplys to indoor unit electric-controlled plate.
It is C21 respectively to C24 as shown in figure 3, energy-storing container 20 is connected in series by four super capacitors, wherein each super
The specification of grade capacitance is 25F/2.7V, single capacitance pressure resistance 2.7V, and four series connection pressure resistances are 10.8V, due to there is trueness error, are stored up
Voltage range after energy container 20 is fully charged is in 10.8V between 10.86V.To ensure the charging voltage one of each super capacitor
It causes, each super capacitor high-precision divider resistance in parallel, is R21 to R24 respectively, the specification of each divider resistance is
10K, 1%.
Secondly be voltage detection module 24, including main power source detection and state notifying module, when normal power supply, main power source electricity
Pressure is 12V, and it is 10.8V that energy-storing container 20 exports stand-by power supply to indoor unit electric-controlled plate after power-off, by detecting on main power source
Voltage, and compared with a threshold voltage (such as 10.5V), when the voltage on main power source be higher than threshold values, then judging main power source just
Often；When the voltage on main power source is less than threshold values, then judge that main power source powers off, single-phase diode D2 conducting, energy-storing container 20 starts
Electric discharge (voltage slowly reduces after energy-storing container 20 discharges), and send out main power source OFF signal to indoor unit electric-controlled plate.Wherein, such as
Shown in Fig. 5, voltage detection module 24 detects main power voltage, using two precision resisters R2, R3 by Chip Microcomputer A/D 1-0
Voltage analog is switched to digital quantity, then corresponding with threshold values by partial pressure, collected main power line voltage by analog-to-digital conversion
Digital quantity compare, main power line line state is judged with this.For example, AD1-0 detects 11.5V or more, (voltage of main power source is just
It is often 12V), indicate that main power source power supply is normal, microcontroller P2 maintains low level, Q3 (8050) to be not turned on；AD1-0 is detected
For 11.5V hereinafter, indicating main power source power-off, energy-storing container 20 provides 10.8V voltages as standby voltage, the high electricity of microcontroller P2 outputs
Flat, Q3 conductings export OFF signal and give indoor unit electric-controlled plate；
For indoor unit electric-controlled plate, indoors when the main power source normal power supply of Electrical Control plate, electric expansion valve is spare
Power panel exports main power source ON signals and gives air-conditioning internal machine electric-controlled plate, and air conditioner normal operation, refrigerant is in compressor, condenser, steaming
Send out the direct normal circulation of device.
Indoors after the main power source power supply power-off of Electrical Control plate, air conditioner is out of service, the main power source of indoor unit electric-controlled plate
12V is also powered off, at this moment electric expansion valve stand-by power supply provide 12V and 5V power supplys give indoor unit electric-controlled plate, and export OFF signal to
Indoor unit electric-controlled plate, indoor unit electric-controlled plate enter main power source power-off interrupt routine, close electric expansion valve.
Second aspect of the present invention embodiment, it is proposed that a kind of air conditioner, including electric expansion valve further include：Such as above-mentioned reality
Apply the indoor unit of any one of example.
Air conditioner provided by the invention using the indoor unit of any one of such as above-described embodiment, therefore has the indoor unit
Whole advantageous effects, repeats no more.
The embodiment of third aspect present invention, it is proposed that a kind of control method of indoor unit is used for air conditioner, indoor unit packet
It includes：Electric expansion valve, indoor unit further include control device, and the charge-discharge modules being connected with control device, and Fig. 6 shows this
The flow diagram of the control method of the indoor unit of one embodiment of invention.Wherein, the control method of the indoor unit, including：
Step 602, the voltage of the main power source of detection control apparatus；
Step 604, judge whether main power source powers off according to voltage；
Step 606, when judging main power source power-off, charge-discharge modules electric discharge generates first control signal, according to the first control
Signal processed closes electric expansion valve.
The control method of indoor unit provided by the invention judges main electricity by the voltage of the main power source of detection control apparatus
Whether source powers off, and when main power source powers off, charge-discharge modules are in discharge condition, in order to control device power, control device according to
After receiving main power source OFF signal, first control signal is generated, to close electric expansion valve.In addition when judgement main power source just
Often when power supply, charge-discharge modules are in charged state, and the direct current of main power source output is used to charge for charge-discharge modules.Pass through this
The control method of invention, after detecting the main power source accident power-off of control device, by charge-discharge modules, device carries in order to control
For required operating voltage, control device is made to close electric expansion valve, to avoid indoor machine evaporation from generating condensation, caused
Interior machine, which drips, even results in the phenomenon that compressor liquid hammer occurs, and improves the service life of compressor, while the interior of the present invention
Machine can effectively reduce production cost, reduce small product size, reduce energy consumption without increasing solenoid valve.
Fig. 7 shows the flow diagram of the control method of the indoor unit of an alternative embodiment of the invention.Wherein, the room
The control method of interior machine, including：
Step 702, the voltage of the main power source of detection control apparatus；
Step 704, judge whether voltage is less than predetermined threshold value；
Step 706, when judging result is to be, judgement main power source power-off, charge-discharge modules electric discharge generates the first control letter
Number, according to first control signal, close electric expansion valve；
Step 708, when judging result is no, judgement main power source power supply is normal, and machine is being under the current model just in control sky
Often operation.
In this embodiment, by the way that the voltage of main power source to be compared with predetermined threshold value, when the voltage of main power source is higher than
When predetermined threshold value, then judge that main power source is normal；When the voltage on main power source be less than pre-set threshold value, then judge main power source power off, fill
Discharge module starts to discharge, and provides control device of the 12V and/or 5V power supplys to indoor unit.When judging that main power source power supply is normal,
Indoor unit is run according to normal condition.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of indoor unit, is used for air conditioner, the indoor unit includes：Electric expansion valve, which is characterized in that the indoor unit is also
Including：
Detection module is connected with the control device of the indoor unit, the voltage of the main power source for detecting the control device,
Judge whether the main power source powers off according to the voltage；
Charge-discharge modules are connected with the detection module and the control device respectively, are used for when the main power source powers off,
It powers for the control device, so that the control device generates first control signal, is closed according to the first control signal
The electric expansion valve；
Wherein, when main power source power supply is normal, the direct current of output is used to charge for the charge-discharge modules.
2. indoor unit according to claim 1, which is characterized in that the charge-discharge modules include：
DC decompression power supply is connected with the control device, for the direct current of the output of the main power source to be down to charging
Voltage charges for energy-storing container；
The energy-storing container is connected with the DC decompression power supply, for storing electric energy.
3. indoor unit according to claim 2, which is characterized in that
The energy-storing container includes：Multiple capacitances being connected in series with, wherein each capacitance at least one first partial pressure in parallel
Resistance.
4. indoor unit according to claim 3, which is characterized in that the detection module includes：
Sampling unit, the sampling unit include at least two second divider resistances, the voltage for acquiring the main power source；
Converting unit is connected with the sampling unit, for the voltage to be converted to digital quantity from analog quantity；
Comparing unit is connected with the converting unit, for by the digital quantity of the voltage and the digital quantity of predetermined threshold value into
Row compares, and judges whether the main power source powers off according to comparison result.
5. indoor unit according to claim 3 or 4, which is characterized in that the charge-discharge modules further include：
First switch, one end of the first switch are connected with the control device, and the other end is connected with the energy-storing container
It connects；
Second switch, one end of the second switch are connected with the energy-storing container, and the other end is connected with the control device
It connects；
Wherein, when the voltage is greater than or equal to the predetermined threshold value, judge that main power source power supply is normal, then described first
Switch conduction, the second switch cut-off, the charge-discharge modules charge；And
When the voltage is less than the predetermined threshold value, main power source power-off is judged, then the first switch cut-off, described the
Two switch conductions, the charge-discharge modules discharge.
6. indoor unit according to claim 5, which is characterized in that
The first switch is the first diode, and the anode of first diode is connected with the control device, described the
The cathode of one diode is connected with the energy-storing container；
The second switch is the second diode, and energy-storing container described in the anode of second diode is connected, described second
The cathode of diode is connected with the control device.
7. indoor unit according to claim 5, which is characterized in that further include：
Pressure unit, described pressure unit one end are connected with the second switch, and the other end is connected with the control device,
It is depressured for the discharge voltage to the charge-discharge modules.
8. indoor unit according to claim 7, which is characterized in that
The discharge voltage includes：5V and/or 12V.
9. a kind of air conditioner, including electric expansion valve, which is characterized in that further include：As described in any one of claim 1 to 8
Indoor unit.
10. a kind of control method of indoor unit, is used for air conditioner, the indoor unit includes：Electric expansion valve, which is characterized in that
The indoor unit further includes control device, and the charge-discharge modules being connected with the control device, and the control method includes：
Detect the voltage of the main power source of the control device；
Judge whether the main power source powers off according to the voltage；
When judging the main power source power-off, the charge-discharge modules electric discharge generates first control signal, is controlled according to described first
Signal processed closes the electric expansion valve.
11. the control method of indoor unit according to claim 10, which is characterized in that described to judge institute according to the voltage
The step of whether main power source powers off is stated, is specifically included：
Judge whether the voltage is less than predetermined threshold value；
When judging result is to be, the main power source power-off is judged；And
When judging result is no, judge that the main power source power supply is normal.
12. the control method of the indoor unit according to claim 10 or 11, which is characterized in that further include：
When judging that main power source power supply is normal, second control signal is generated, according to the second control signal, described in control
Machine normal operation under the current model in sky.
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| CN201810305649.2A CN108709284A (en) | 2018-04-08 | 2018-04-08 | The control method of indoor unit, air conditioner and indoor unit |
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| CN109945400A (en) * | 2019-03-29 | 2019-06-28 | 广东美的制冷设备有限公司 | Air conditioner and its dewing-proof method and device |
| CN110173837A (en) * | 2019-05-10 | 2019-08-27 | 广东美的制冷设备有限公司 | Air conditioner and its control method and device |
| CN110986337A (en) * | 2019-12-06 | 2020-04-10 | 珠海格力电器股份有限公司 | Electric appliance reset control method and device and electric appliance |
| CN112290545A (en) * | 2020-10-21 | 2021-01-29 | 珠海格力电器股份有限公司 | Power supply control device and method and multi-split air conditioning system |
| CN112762527A (en) * | 2020-12-31 | 2021-05-07 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and power-off control method thereof |
| CN113531790A (en) * | 2021-06-09 | 2021-10-22 | 青岛海信日立空调系统有限公司 | Communication control circuit, multi-connected air conditioner and control method |
| CN115371202A (en) * | 2022-08-29 | 2022-11-22 | 四川虹美智能科技有限公司 | Intelligent air conditioner abnormal power-off resetting device and method thereof |
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| CN109945400A (en) * | 2019-03-29 | 2019-06-28 | 广东美的制冷设备有限公司 | Air conditioner and its dewing-proof method and device |
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| CN110986337A (en) * | 2019-12-06 | 2020-04-10 | 珠海格力电器股份有限公司 | Electric appliance reset control method and device and electric appliance |
| CN112290545A (en) * | 2020-10-21 | 2021-01-29 | 珠海格力电器股份有限公司 | Power supply control device and method and multi-split air conditioning system |
| CN112762527A (en) * | 2020-12-31 | 2021-05-07 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and power-off control method thereof |
| WO2022068942A1 (en) * | 2020-12-31 | 2022-04-07 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and power-off control method therefor |
| CN113531790A (en) * | 2021-06-09 | 2021-10-22 | 青岛海信日立空调系统有限公司 | Communication control circuit, multi-connected air conditioner and control method |
| CN115371202A (en) * | 2022-08-29 | 2022-11-22 | 四川虹美智能科技有限公司 | Intelligent air conditioner abnormal power-off resetting device and method thereof |
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