CN104896666B - The control method and air-conditioning of a kind of air-conditioner outdoor unit - Google Patents
The control method and air-conditioning of a kind of air-conditioner outdoor unit Download PDFInfo
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- CN104896666B CN104896666B CN201510282959.3A CN201510282959A CN104896666B CN 104896666 B CN104896666 B CN 104896666B CN 201510282959 A CN201510282959 A CN 201510282959A CN 104896666 B CN104896666 B CN 104896666B
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- air
- pressure switch
- state
- aperture
- preset time
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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
- F24F11/70—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
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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
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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
- F24F2110/00—Control inputs relating to air properties
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
Abstract
The present invention relates to air conditioner technical field, and in particular to the control method and air-conditioning of a kind of air-conditioner outdoor unit.The control method of the air-conditioner outdoor unit can control the aperture of electric expansion valve according to high-pressure switch state in real time; after air conditioner start is run and reaches the high voltage protective pressure of setting; first; controller controls electric expansion valve to be opened with larger aperture to reduce high-pressure rapidly, avoids air-conditioning protection shutdown or overload of compressor protection;Then; controller control electric expansion valve is gradually reduced aperture to reduce refrigerant bypass amount; realize that air conditioner refrigerating amount is gradually lifted; make high-pressure on the premise of the high voltage protective value no more than default; the refrigerant bypass amount that high-pressure side flows to low-pressure side is reduced to greatest extent; both air conditioner normal operation under high ambient conditions had been can guarantee that, and ensure that high-temperature refrigeration ability to greatest extent.
Description
Technical field
The present invention relates to the control method and air-conditioning of air conditioner technical field, more particularly to a kind of air-conditioner outdoor unit.
Background technology
At present, for existing air conditioner when hot environment is run, refrigeration system high pressure pressure is higher, when high-pressure reaches
During the pressure protection value of air-conditioning setting, high voltage protective switch motion or overload of compressor can be caused to protect, air conditioner can be shut down.
To solve this problem, a part of air conditioner, the air conditioner for being particularly suitable for T3 worst hot cases area are mounted with unloading valve,
When high-pressure reaches the setup pressure value of unloading valve, unloading valve automatically turns on, and flows into a part of high-pressure side refrigerant bypass low
Side is pressed, so that high-pressure reduces, high voltage protective running is avoided or overload of compressor is protected so that air conditioner keeps normal
Operation.But this unloading control method can not be controlled to the bypass amount of refrigerant, can only be turned on and off.Once off-load
Valve events (fully open), then can cause a large amount of decay of air conditioner refrigerating amount.Experiment shows there is the air-conditioning of this control method
Device, the decay of its high-temperature refrigeration amount can reach 30%-50%.
The content of the invention
(1) technical problems to be solved
The technical problem to be solved in the present invention is higher in air conditioner high-pressure and when reaching pressure protection value, and air-conditioning is whole
Chance is shut down, the problem of causing a large amount of decay of air conditioner refrigerating amount.
(2) technical scheme
In order to solve the above-mentioned technical problem, the present invention provides a kind of control method of air-conditioner outdoor unit, including following step
Suddenly:
S1, air conditioner are started shooting operation after starting-up signal is received, and run the first preset time;
S2, controller detect the state of high-pressure switch in real time, if high-pressure switch is on-state, and continue
Second preset time, then perform step S3;If high-pressure switch is off-state, and continues the second preset time, then hold
Row step S4;
S3, air conditioner maintain current operating conditions;
S4, controller control electric expansion valve are opened with the first default aperture and run the first preset time;
S5, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue
Second preset time, then perform step S6;If high-pressure switch is on-state, and continues the second preset time, then hold
Row step S7;
S6, air conditioner are shut down and report pressure protection failure;
S7, controller control electric expansion valve are opened with the second default aperture and run the first preset time;
S8, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue
Second preset time, then return and perform step S4;If high-pressure switch is on-state, and continues the second preset time,
Then perform step S9;
S9, controller control electric expansion valve maintain the second default aperture or with less than the described second default apertures
Aperture opens and continue to run.
Wherein, the described first default aperture is 100%.
Wherein, the described second default aperture is 60%-80%.
Wherein, in step s 9, controller control electric expansion valve is opened with the 3rd default aperture and is run first and preset
Time, the described 3rd default aperture are less than the described second default aperture;
S10, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and hold
Continuous second preset time, then return and perform step S7;If high-pressure switch is on-state, and continue second it is default when
Between, then perform step S11;
S11, controller control electric expansion valve maintain the 3rd default aperture or with less than the described 3rd default apertures
Aperture open and continue to run.
Wherein, the described 3rd default aperture is 30%-50%.
Wherein, in step s 11, controller control electric expansion valve is opened with the 4th default aperture and is run first and preset
Time, the described 4th default aperture are less than the described 3rd default aperture;
S12, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and hold
Continuous second preset time, then return and perform step S9;If high-pressure switch is on-state, and continue second it is default when
Between, then perform step S13;
S13, controller control electric expansion valve maintain the 4th default aperture.
Wherein, the described 4th default aperture is 0%-20%.
Wherein, first preset time is set as 3-5 minutes.
Wherein, second preset time is set as the 10-20 seconds.
In addition, the present invention also provides a kind of air-conditioning, the air-conditioning includes processor, and the processor is configured to described in execution
The control method of air-conditioner outdoor unit.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the advantages that:
, can be in real time according to refrigeration system high pressure pressure switch shape the invention provides a kind of control method of air-conditioner outdoor unit
State controls the aperture of electric expansion valve, so that high-pressure is on the premise of the high voltage protective value no more than default, it is maximum
The refrigerant bypass amount that high-pressure side flows to low-pressure side is reduced to limit, both can guarantee that air conditioner was normally transported under high ambient conditions
OK, high-temperature refrigeration ability and is ensure that to greatest extent.
Brief description of the drawings
Fig. 1 is the structural representation of air-conditioner outdoor unit of the embodiment of the present invention;
Fig. 2 is the theory diagram of the control method of air-conditioner outdoor unit of the embodiment of the present invention;
Wherein, 1:Compressor;2:Compressor exhaust pipe;3:Four-way valve;4:Condenser;5:Throttle part;6:Condenser is defeated
Outlet pipe;7:Evaporator;8:Compressor return air pipe;9:Electric expansion valve;10:Bypass adapter;11:High-pressure switch;12:Refrigerant
Flow direction.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
Illustrate the present invention, but can not be used for limiting the scope of the present invention.
In the description of the invention, it is necessary to explanation, unless otherwise indicated, " multiple " be meant that two or two with
On;The orientation of the instruction such as term " on ", " under ", "left", "right", " interior ", " outer ", " front end ", " rear end ", " head ", " afterbody "
Or position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and simplifies description, and
It is not instruction or implies signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore
It is not considered as limiting the invention.In addition, term " first ", " second ", " the 3rd " etc. are only used for describing purpose, and can not
It is interpreted as indicating or implying relative importance.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " installation ",
" connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly be connected
Connect;Can be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected by intermediary.It is right
For one of ordinary skill in the art, visual concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Embodiment one
As shown in Fig. 2 the present embodiment provides a kind of control method of air-conditioner outdoor unit, comprise the following steps:
S1, air conditioner are started shooting operation after starting-up signal is received, and run the first preset time;
Preferably, the first preset time is set as 3-5 minutes.It is empty with reference to shown in Fig. 1 in the first preset time range
When adjusting device refrigerating operaton, HTHP cold media gas is transported to condensation by compressor 1 by compressor exhaust pipe 2 through four-way valve 3
Device 4 radiates, and the refrigerant high pressure liquid condensed by condenser 4 passes through the throttling decrease temperature and pressure of throttle part 5, and then enters and steam
The heat that room air is drawn in evaporation in device 7 is sent out, afterwards, the refrigerant gas of low-temp low-pressure enters through compressor muffler 8 again
It is compressed in compressor 1, so constantly circulation.
S2, controller detect the state of high-pressure switch in real time, if high-pressure switch is on-state, and continue
Second preset time, then perform step S3;If high-pressure switch is off-state, and continues the second preset time, then hold
Row step S4;
With reference to shown in Fig. 1, condenser efferent duct 6 and compressor return air pipe 8 are connected by bypassing adapter 10, electric expansion valve
9 are arranged in bypass adapter 10 and are electrically connected with controller (not shown in FIG.), and high-pressure switch 11 takes over and compressor
Blast pipe 2 connects.
Wherein, the state of detection high-pressure switch, high-pressure switch have controller in real time during operation of starting shooting
Two states are switched on and off, connects and represents that high-pressure is not up to high-pressure switch set pressure protection value, disconnect and representing
High-pressure meets or exceeds high-pressure switch set pressure protection value.
S3, air conditioner maintain current operating conditions;That is, high-pressure switch is on-state, and continue second it is default when
Between after continue to original state work, represent that current high-pressure is not above the high voltage protective value of default, in just
Normal working condition.
S4, controller control electric expansion valve are opened with the first default aperture and run the first preset time;
Wherein, the first default aperture is preferably 100%, i.e. electric expansion valve is fully open;The purpose is in air-conditioning high pressure
Pressure reaches rapid progress off-load after default protection value, to ensure the safe operation of air-conditioning system.
S5, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue
Second preset time, then perform step S6;If high-pressure switch is on-state, and continues the second preset time, then hold
Row step S7;
Preferably, the second preset time is set as the 10-20 seconds.
S6, air conditioner are shut down and report pressure protection failure;
That is, after off-load electric expansion valve is opened completely, air-conditioning high-pressure switch still acts, then air-conditioning
Complete machine is stopped, and reports and submits failure to be repaired.
S7, controller control electric expansion valve are opened with the second default aperture and run the first preset time, and second is default
Aperture is less than the first default aperture, to reduce refrigerant bypass amount, realizes that air conditioner refrigerating amount is gradually lifted;
S8, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue
Second preset time, then return and perform step S4;If high-pressure switch is on-state, and continues the second preset time,
Then perform step S9;
Moreover, the second default aperture is 60%-80%, certainly, default aperture can according to being actually needed flexible setting, as long as
Meet to be less than the first default aperture.
S9, controller control electric expansion valve maintain the second default aperture.
If in addition, wanting to continue to reduce the refrigerant bypass amount that high-pressure side flows to low-pressure side, by controller electronics can be controlled swollen
Swollen valve opens and continue to run with the aperture less than the described second default aperture, so that high-pressure is no more than default
High voltage protective value on the premise of, farthest ensure high-temperature refrigeration ability.
Wherein, electric expansion valve carries out stepless opening degree regulation or multistage aperture regulation under the control of the controller, such as:Electricity
Sub- expansion valve is magnetic valve, and magnetic valve can carry out aperture regulation under the control of the controller.Certainly, the structure of electric expansion valve is simultaneously
Do not limit to, as long as meeting that aperture can be adjusted.
Controlled it can be seen that the present embodiment one mainly presets aperture (the first default aperture, the second default aperture) using two level
System;The aperture of electric expansion valve can be controlled according to refrigeration system mesohigh pressure switch state in real time, so that high-pressure is not
On the premise of high voltage protective value more than default, the refrigerant bypass amount that high-pressure side flows to low-pressure side is reduced to greatest extent,
Both air conditioner normal operation under high ambient conditions had been can guarantee that, and ensure that high-temperature refrigeration ability to greatest extent.
Embodiment two
The present embodiment two and the identical technology contents not repeated description of embodiment one, the disclosure of embodiment one are fallen within
The disclosure of the present embodiment two, the present embodiment two are with the difference of embodiment one:The present embodiment two presets aperture using three-level
It is controlled, that is to say, that it is (that is, pre- including first that the present embodiment two increases the default aperture of one-level on the basis of embodiment one
If aperture, the second default aperture and the 3rd default aperture).
Specially:In step s 9, controller control electric expansion valve is opened with the 3rd default aperture and to run first pre-
If the time, the 3rd default aperture is less than the second default aperture;Wherein, the 3rd default aperture is preferably 30%- in the present embodiment
50%.
Afterwards, step S10 is continued executing with, controller detects the state of high-pressure switch in real time, if high-pressure is opened
Close as off-state, and continue the second preset time, then return and perform step S7, what deserves to be explained is, perform step when returning
, it is necessary to continue executing with again during S7;If high-pressure switch is on-state, and continues the second preset time, then step is performed
Rapid S11;
S11, controller control electric expansion valve maintain the 3rd default aperture.Now, embodiment is compared under equal conditions
For one, this implementation two reduces refrigerant bypass amount more to greatest extent.
Certainly, on the premise of the high voltage protective value that default is no more than in high-pressure, if thinking further to reduce height
Refrigerant bypass amount of the effluent to low-pressure side is pressed, electric expansion valve can be also controlled by controller with less than the described 3rd default aperture
Aperture open and continue to run.
It can be seen that the present embodiment two is using the default aperture of three-level, (the first default aperture, the second default aperture, the 3rd, which preset, to open
Degree) it is controlled;After air-conditioning start is run and reaches the high voltage protective pressure of setting, electric expansion valve is first controlled with larger
Aperture is opened to reduce high-pressure rapidly, avoids air-conditioning protection shutdown or overload of compressor protection, then, controller control electricity
Sub- expansion valve reduces aperture (two-stage) to reduce refrigerant bypass amount step by step, air conditioner refrigerating amount is gradually lifted.
Embodiment three
The present embodiment three and the identical technology contents not repeated description of embodiment two, the disclosure of embodiment two are fallen within
The disclosure of the present embodiment three, the present embodiment three are with the difference of embodiment two:The present embodiment three presets aperture using level Four
It is controlled, that is to say, that the default aperture of one-level is further added by the basis of embodiment two, and (the first default aperture, second are preset
Aperture, the 3rd default aperture and the 4th default aperture).
Specifically, as shown in Fig. 2 in step s 11, controller controls electric expansion valve to be opened simultaneously with the 4th default aperture
The first preset time is run, the 4th default aperture is less than the 3rd default aperture;
Preferably, the 4th default aperture is 0%-20%, and the cold of low-pressure side is flowed to reduce high-pressure side to greatest extent
Matchmaker's bypass amount.
S12, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and hold
Continuous second preset time, then return and perform step S9;If high-pressure switch is on-state, and continue second it is default when
Between, then perform step S13;
S13, controller control electric expansion valve maintain the 4th default aperture.
What deserves to be explained is the aperture size of controller control electric expansion valve is first to fourth in above-mentioned control method
Between default aperture, its description and understanding merely for convenience to above-mentioned control method.In actual applications can be according to need
Set the default aperture of less or more rank.As long as moreover, meet the first default aperture, the second default aperture, the 3rd pre-
If successively decrease successively between aperture and the 4th default aperture.
Example IV
As shown in figure 1, the present invention also provides a kind of air-conditioning, the air-conditioning includes processor, and the processor is configured to hold
The control method of the row air-conditioner outdoor unit.The air conditioner also includes:It is compressor 1, compressor exhaust pipe 2, four-way valve 3, cold
Condenser 4, throttle part 5, condenser efferent duct 6, evaporator 7, compressor return air pipe 8, electric expansion valve 9, bypass adapter 10, height
Pressure pressure switch 11.When air conditioner refrigerating is run, from the point of view of refrigerant flow direction 12, compressor 1 passes through compressor exhaust pipe 2
HTHP cold media gas is transported to condenser 4 through four-way valve 3 and radiated, the refrigerant high pressure liquid condensed afterwards by condenser 4
Body passes through the throttling decrease temperature and pressure of throttle part 5, the heat of evaporation absorption room air into evaporator 7, low-temp low-pressure
Refrigerant gas enters in compressor 1 through compressor muffler 8 again to be compressed, so constantly circulation.The He of condenser efferent duct 6
Compressor return air pipe 8 is connected by bypassing adapter 10, and electric expansion valve 9 is arranged in bypass adapter 10 and with controller (in figure
It is not shown) electrical connection, on high-tension side refrigerant to be flowed into low-pressure side.High-pressure switch 11 takes over and compressor exhaust pipe
2 connections.
In conjunction with the embodiments one to three, the processor is according to above-mentioned control method to electric expansion valve 9, high-pressure switch 11
And controller is controlled, opening for electric expansion valve is controlled according to refrigeration system high pressure pressure switch state in real time so as to realize
Degree.
Wherein, high-pressure switch 11, which has, switches on and off two states, connects and represents that high-pressure is not up to high pressure
The set pressure protection value of pressure switch 11, disconnect and represent that high-pressure meets or exceeds the protection of the set pressure of high-pressure switch 11
Value.
Wherein, high pressure refrigerant is to bypass off-load to compressor return air pipe 8 from condenser efferent duct 6 by bypassing adapter 10.
Certainly, high pressure refrigerant can also bypass off-load from compressor exhaust pipe 2 by bypassing adapter 10 to compressor return air pipe 8.
In summary, can be in real time according to refrigeration system high pressure the invention provides a kind of control method of air-conditioner outdoor unit
Pressure switch state controls the aperture of electric expansion valve, so that high-pressure is before the high voltage protective value no more than default
Put, reduce the refrigerant bypass amount that high-pressure side flows to low-pressure side to greatest extent, both can guarantee that air conditioner in high ambient conditions
Lower normal operation, and high-temperature refrigeration ability is ensure that to greatest extent.
Embodiments of the invention provide for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be to more preferably illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to designing the various embodiments with various modifications suitable for special-purpose.
Claims (10)
1. a kind of control method of air-conditioner outdoor unit, it is characterised in that comprise the following steps:
S1, air conditioner are started shooting operation after starting-up signal is received, and run the first preset time;
S2, controller detect the state of high-pressure switch in real time, if high-pressure switch is on-state, and continue second
Preset time, then perform step S3;If high-pressure switch is off-state, and continues the second preset time, then step is performed
Rapid S4;
S3, air conditioner maintain current operating conditions;
S4, controller control electric expansion valve are opened with the first default aperture and run the first preset time;The electronic expansion
Valve is arranged on bypass adapter above and electrically connected with the controller;
S5, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue second
Preset time, then perform step S6;If high-pressure switch is on-state, and continues the second preset time, then step is performed
Rapid S7;
S6, air conditioner are shut down and report pressure protection failure;
S7, controller control electric expansion valve are opened with the second default aperture and run the first preset time, and described second is default
Aperture is less than the first default aperture;
S8, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue second
Preset time, then return and perform step S4;If high-pressure switch is on-state, and continues the second preset time, then hold
Row step S9;
S9, controller control electric expansion valve maintain the second default aperture or with the apertures less than the described second default aperture
Open and continue to run.
2. the control method of air-conditioner outdoor unit according to claim 1, it is characterised in that described first, which presets aperture, is
100%.
3. the control method of air-conditioner outdoor unit according to claim 1, it is characterised in that described second, which presets aperture, is
60%-80%.
4. the control method of air-conditioner outdoor unit according to claim 1, it is characterised in that in step s 9, controller
Control electric expansion valve is opened with the 3rd default aperture and runs the first preset time, and the described 3rd default aperture is less than described the
Two default apertures;
S10, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue
Two preset times, then return and perform step S7;If high-pressure switch is on-state, and continues the second preset time, then
Perform step S11;
S11, controller control electric expansion valve maintain the 3rd default aperture or with opening less than the described 3rd default aperture
Degree opens and continue to run.
5. the control method of air-conditioner outdoor unit according to claim 4, it is characterised in that the described 3rd, which presets aperture, is
30%-50%.
6. the control method of air-conditioner outdoor unit according to claim 4, it is characterised in that in step s 11, controller
Control electric expansion valve is opened with the 4th default aperture and runs the first preset time, and the described 4th default aperture is less than described the
Three default apertures;
S12, controller detect the state of high-pressure switch in real time, if high-pressure switch is off-state, and continue
Two preset times, then return and perform step S9;If high-pressure switch is on-state, and continues the second preset time, then
Perform step S13;
S13, controller control electric expansion valve maintain the 4th default aperture.
7. the control method of air-conditioner outdoor unit according to claim 6, it is characterised in that the described 4th, which presets aperture, is
0%-20%.
8. the control method of the air-conditioner outdoor unit according to any one of claim 1-7, it is characterised in that described first
Preset time is set as 3-5 minutes.
9. the control method of the air-conditioner outdoor unit according to any one of claim 1-7, second preset time is set
It is set to the 10-20 seconds.
10. a kind of air-conditioning, the air-conditioning includes processor, and the processor is configured to perform as any one in claim 1-9
The control method of the item air-conditioner outdoor unit.
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