CN106705364B - The control method and air conditioner of outdoor fan under air conditioner cryogenic refrigeration operating condition - Google Patents
The control method and air conditioner of outdoor fan under air conditioner cryogenic refrigeration operating condition Download PDFInfo
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- CN106705364B CN106705364B CN201611237928.7A CN201611237928A CN106705364B CN 106705364 B CN106705364 B CN 106705364B CN 201611237928 A CN201611237928 A CN 201611237928A CN 106705364 B CN106705364 B CN 106705364B
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- air conditioner
- motor
- outdoor fan
- setting
- operating condition
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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
-
- 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
-
- 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
-
- 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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
-
- 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
-
- 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
- F24F2140/20—Heat-exchange fluid temperature
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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)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of control method of outdoor fan under air conditioner cryogenic refrigeration operating condition, comprising: setting output cycle T；The cut-off number N of setting output cycle T, output cycle T include duty cycle t, duty cycle t=1/N, have voltage control signal to export to motor in duty cycle t, voltage control signal is sine wave half-wave signa；The setting speed of motor is directly proportional to the virtual value of voltage control signal in duty cycle t；Motor driven outdoor fan is acted according to setting speed to adjust the heat exchange amount of heat exchanger.Also disclose a kind of air conditioner.The sine wave half-wave signa that the present invention is exported by controller, the voltage at motor both ends is controlled in the output period of setting, pass through the length of duty cycle in the setting output period, adjust the virtual value size of voltage control signal, so that outdoor unit blower is steadily adjusted according to the overall operation state of equipment to certain revolving speed, the start-stop time of compressor is reduced, realizes the continuous cooling under worst cold case.
Description
Technical field
The present invention relates to outdoor fans under air-conditioning technique field more particularly to a kind of air conditioner cryogenic refrigeration operating condition
Control method and a kind of air conditioner using the outdoor fan control method.
Background technique
The air conditioner of the overwhelming majority is all under the conditions of summer, outdoor temperature was higher using refrigerating function, but certain
Special section or special workplace may require that under outdoor low temperature environment, freeze.Common fixed frequency air conditioner is low
Temperature or ultra-low temperature surroundings under freeze (0 DEG C to -20 DEG C), indoor evaporator temperature can be very low, cause evaporator icing or
Person's frosting, cannot effectively and smoothly freeze output.
In order to solve this problem, it is usually protected in the prior art by making evaporator enter defrosting state.?
Into after defrosting guard mode, compressor shutdown, refrigerating function stops.Freeze protection terminates after a few minutes, and compressor moves again
Make, then carries out refrigerating operaton.Entering so frequent is protected, and air conditioner has that refrigerating capacity substantially reduces.
Therefore, air conditioner in the prior art when running under worst cold case, exists and is easily accessible defrosting protection, reduce
The problem of refrigerating capacity.
Summary of the invention
The present invention provides a kind of control method of outdoor fan under air conditioner cryogenic refrigeration operating condition, to solve the prior art
When air conditioner is run under worst cold case, the problem of being easily accessible defrosting protection, reduce refrigerating capacity.
The present invention provides the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition, comprising the following steps: setting electricity
The output cycle T of machine voltage control signal；
Cut-off the number N, N for setting the output cycle T are positive integer,
The output cycle T includes duty cycle t, and the duty cycle t=1/N has electricity in the duty cycle t
Voltage-controlled signal processed is exported to the motor, and the voltage control signal is the sine wave half-wave signa with certain amplitude；
The virtual value of the voltage control signal exported in the setting speed of the motor and the duty cycle t is at just
Than；
When air conditioner work is under cryogenic refrigeration operating condition, the motor driven outdoor fan is acted according to setting speed,
Adjust the heat exchange amount of outdoor unit heat exchanger.
Further, when the setting speed of the motor is maximum (top) speed, the cut-off number is 1.
Further, further comprising the steps of:
Acquire the coil temperature T of outdoor unit heat exchangero, as the coil temperature T of outdoor unit heat exchangeroWhen lower than first threshold,
Cut-off number is set as N1,
As the coil temperature T of outdoor unit heat exchangeroWhen lower than second threshold, cut-off number is set as N2,
Wherein, second threshold is lower than first threshold, N2>N1>1。
Further, when the cut-off number that sets is N1When, the motor is rotated according to the first wind-speed gear, when described
Set cut-off number as N2When, the motor is rotated according to the second wind-speed gear；First wind-speed gear is middle wind speed shelves
Position, second wind-speed gear are low wind-speed gear.
Preferably, the first threshold is 14 DEG C, and the setting ends number N1=8, the second threshold is 10 DEG C, institute
State setting cut-off number N2=48。
Further, further comprising the steps of:
As the coil temperature T of the outdoor unit heat exchangeroWhen lower than third threshold value, the motor stopping；
As the coil temperature T of the outdoor unit heat exchangeroAfter rising and being higher than the first threshold, the motor opens again
It is dynamic.
Preferably, the third threshold value is 0 DEG C.
Further, the voltage control signal is exported by an output port of outdoor controller.
The present invention controls signal by the sine wave half-wave voltage that an output port of outdoor controller exports, one
The voltage that outdoor unit blower motor both ends are controlled in the output period of a setting passes through the length of duty cycle in the setting output period
Degree, adjusts the virtual value size of voltage control signal, so that outdoor unit blower is steadily adjusted according to the overall operation state of equipment
To certain revolving speed, the heat exchange amount of outdoor unit is further adjusted, to avoid under conditions of guaranteeing that equipment overall operation is stablized
Equipment enters defrosting protected mode, reduces the start-stop time of compressor, realizes the continuous cooling under worst cold case.
Present invention simultaneously discloses a kind of air conditioners, are transported using the outdoor fan under following methods control worst cold case operation
Row, control method specifically includes the following steps:
Set the output cycle T of electric moter voltage control signal；
Cut-off the number N, N for setting the output cycle T are positive integer,
The output cycle T includes duty cycle t, and the duty cycle t=1/N has electricity in the duty cycle t
Voltage-controlled signal processed is exported to the motor, and the voltage control signal is the sine wave half-wave signa with certain amplitude；
The virtual value of the voltage control signal exported in the setting speed of the motor and the duty cycle t is at just
Than；
When air conditioner work is under cryogenic refrigeration operating condition, the motor driven outdoor fan is acted according to setting speed,
Adjust the heat exchange amount of outdoor unit heat exchanger.
Air conditioner disclosed in this invention passes through blower motor outside half-sinusoid signal control room in worst cold case operation
Revolving speed, equipment will not enter defrosting protective program, have the advantages that stable.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the stream of the control method embodiment one of outdoor fan under air conditioner cryogenic refrigeration operating condition disclosed in this invention
Cheng Tu；
Fig. 2 is the stream of the control method embodiment two of outdoor fan under air conditioner cryogenic refrigeration operating condition disclosed in this invention
Cheng Tu.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Stream shown in Figure 1 for the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition disclosed in this invention
Cheng Tu.Specifically, include the following steps, the driving motor of outdoor fan is set first in the controller of air-conditioner outdoor unit
Voltage control signal output cycle T.For example, by taking the alternating current of frequency 50Hz as an example, setting electric moter voltage control letter
Number output cycle T can be set as 1/50 second.Export cycle T length can according to power supply export power supply signal difference and
It is adjusted, is not limited thereto.It is entirely different with the prior art, in order to which the revolving speed to air-conditioner outdoor unit blower motor carries out
Control, in the present embodiment, the work of the corresponding output cycle T of cut-off number adjustment by setting the output cycle T
Period t/length.Duty cycle t=1/N, N are positive integer.
In order to which blower motor revolving speed outside control room only has electricity in duty cycle t in the output cycle T that one sets
Voltage-controlled signal processed is exported to the motor.In the present embodiment, the voltage control signal is the sine wave with certain amplitude
Half-wave signa.The setting speed of the motor and the virtual value of voltage control signal in the duty cycle t are proportional.Therefore,
After the output cycle T and cut-off number N for setting motor, in an output cycle T, some time is working
In period t, has sine wave half-wave voltage signal and export to motor both ends, the revolving speed of motor is according to sine wave in duty cycle t
The variation of the virtual value of half-wave voltage signal and change, when duty cycle t occupy output cycle T large percentage when, sine wave
The virtual value of half-wave voltage signal is larger, and motor driven outdoor fan is acted according to faster setting speed；When duty cycle t is accounted for
When smaller according to the ratio of output cycle T, the virtual value of sine wave half-wave voltage signal is smaller, and motor driven outdoor fan reduction of speed is dynamic
Make.The waveform of sine wave half-wave signa is smooth, and half-wave signa is directly generated by controller and passes through controller
What one output port exported, the modulation and filtering of half-wave signa are all completed in the controller, so, week is exported in repeatedly setting
It is not in waveform spine during phase T and cut-off number N, what air-conditioner outdoor unit blower can be smooth is transitioned into setting
Revolving speed operation, and then the heat exchange amount of outdoor unit heat exchanger is adjusted, the temperature of evaporator is improved, starting indoor unit is avoided to steam
Device anti-freeze protective program is sent out, the frequency that stoppage protection occurs for compressor is reduced, further increases the job stability of air conditioner.
The side of adjustable sine wave and filtering can be generated using controller in the prior art to the modulation system of sine wave half-wave signa
Method and circuit are not main improvements of the invention, and details are not described herein.
Control method shown in Figure 2 for outdoor fan under air conditioner cryogenic refrigeration operating condition disclosed in this invention is another
The flow chart of kind embodiment.It describes in detail in conjunction with the working condition of outdoor unit heat exchanger to control method.Specifically, it is
The working condition of outdoor unit heat exchanger is measured in real time, and voltage control is generated according to the result of controller real-time detection
Signal is provided with coil temperature sensor on outdoor unit heat exchanger.When air conditioner work in cryogenic refrigeration operating condition, pass through room
The coil temperature T of coil temperature sensor detection outdoor unit heat exchanger on outer machine heat exchangero, when the coil pipe of outdoor unit heat exchanger
Temperature ToWhen lower than first threshold, cut-off number is set as N1, as the coil temperature T of outdoor unit heat exchangeroLower than second threshold
When, cut-off number is set as N2。
Wherein, second threshold is lower than first threshold, N2>N1>1.Adjustment setting cut-off number N numerical value primarily to
When significant change occurs in the temperature of outdoor unit heat exchanger, the wind speed of outdoor unit blower is reduced.By outdoor low temperature environment factor
It influences, than very fast, the wind speed of outdoor unit blower is reduced for the heat exchange cooling of outdoor unit heat exchanger, the heat exchange loss of outdoor unit heat exchanger
Reduce, so as to improve the temperature of indoor side evaporator, and then avoids the evaporimeter frosting of indoor side, reach lasting system
Cold effect.
Since the variation of outdoor temperature is likely to be in fluctuating change, if disk outside setting rotation speed of fan real-time response room
The variation of tube temperature degree then may cause rotation speed of fan and frequently back and forth adjust, influences the job stability of outdoor fan.In order to avoid
There is such case, further sets when the cut-off number that sets is N1When, the motor is rotated according to the first wind-speed gear,
When described sets cut-off number as N2When, the motor is rotated according to the second wind-speed gear.So that setting cut-off number and electricity
Machine wind-speed gear forms one-to-one relationship.Due to the variation of setting cut-off number N be the variation based on temperature range without
Be temperature value and set, so, will not due to outdoor temperature fluctuation and continually change, keep blower corresponding certain
There is fixed wind speed setting gear in outdoor coil temperature section.It is preferably provided with, when the setting speed of motor is maximum (top) speed, cuts
Only number is 1.
As a preferred numberical range, first threshold is set as 14 DEG C, setting ends number N1=8, when outdoor coil pipe used
When temperature is lower than 14 degrees Celsius, the cut-off number N of output cycle T is set as N1, and N1=8, such duty cycle t are to export week
The 1/8 of phase T.There is the output of the sine wave half-wave signa with certain amplitude in only 1/8 time in output cycle T, defeated at one
The virtual value of voltage control signal significantly reduces in cycle T out, and motor drives outdoor fan to run according to middling speed gear at this time.In
Fast gear is 360 turns/min.The amplitude of sine wave half-wave signa can according to outdoor fan, namely motor load size into
Row adjustment.
Second threshold is further set as 10 DEG C, setting ends number N2=48.When outdoor coil temperature continues to be reduced below
At 10 degrees Celsius, the cut-off number N of output cycle T is set as N2And N2=48, such duty cycle t are export cycle T 1/
48, exporting in cycle T only 1/48 time has the output of the sine wave half-wave signa with certain amplitude, an output week
The virtual value of voltage control signal further decreases in phase T, and motor drives outdoor fan to run according to low gear at this time, outdoor
The heat exchange amount of condenser in machine heat exchanger, that is, cryogenic refrigeration operating condition reduces again, and indoor evaporator obtains to a certain extent
Heating.Low gear is 120 turns/min.
It is further additionally provided with a set of protection control program in the present embodiment, when the coil pipe temperature of the outdoor unit heat exchanger
Spend ToWhen lower than third threshold value, motor stopping, so that outdoor fan is out of service, the heat exchange amount of outdoor unit heat exchanger is down at this time
It is minimum.The temperature of outdoor unit heat exchanger can be gradually increasing, until temperature rises to 14 DEG C or more, outdoor fan resumes operation.It is excellent
Choosing, third threshold value is set as 0 DEG C.It is recycled with this to carry out cryogenic refrigeration, in the premise for guaranteeing not entering freeze protection program
Under, safe and stable equipment operation realizes the continuous output of cryogenic refrigeration operating condition.
Using the controlling party of outdoor fan under air conditioner cryogenic refrigeration operating condition disclosed in the above-mentioned two embodiment of the present invention
Method controls signal by the sine wave half-wave voltage that an output port of outdoor controller exports, sets at one defeated
The voltage for controlling outdoor unit blower motor both ends in the period out passes through the length of duty cycle in the setting output period, adjustment electricity
The virtual value size of voltage-controlled signal processed turns so that outdoor unit blower is steadily adjusted according to the overall operation state of equipment to certain
Speed further adjusts the heat exchange amount of outdoor unit, removes so that equipment be avoided to enter under conditions of guaranteeing that equipment overall operation is stablized
White protected mode reduces the start-stop time of compressor, realizes the continuous cooling under worst cold case.
The present invention discloses a kind of air conditioners, are controlled using the control method as disclosed in above-mentioned two embodiment
The outdoor fan run under worst cold case.Control method is no longer gone to live in the household of one's in-laws on getting married herein referring specifically to the detailed description of above-mentioned two embodiment
It states.Same technical effect can achieve using the air conditioner of above-mentioned control method.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. the control method of outdoor fan under a kind of air conditioner cryogenic refrigeration operating condition, which comprises the following steps:
Set the output cycle T of electric moter voltage control signal；
Cut-off the number N, N for setting the output cycle T are positive integer,
The output cycle T includes duty cycle t, and the duty cycle t=1/N has voltage control in the duty cycle t
Signal processed is exported to the motor, and the voltage control signal is the sine wave half-wave signa with certain amplitude；
The virtual value of the voltage control signal exported in the setting speed of the motor and the duty cycle t is directly proportional；
When air conditioner work is under cryogenic refrigeration operating condition, the motor driven outdoor fan is acted according to setting speed, is adjusted
The heat exchange amount of outdoor unit heat exchanger.
2. the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition according to claim 1, which is characterized in that
When the setting speed of the motor is maximum (top) speed, the cut-off number is 1.
3. the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition according to claim 2,
It is further comprising the steps of:
Acquire the coil temperature T of outdoor unit heat exchangero, as the coil temperature T of outdoor unit heat exchangeroWhen lower than first threshold, setting
Cut-off number is N1,
As the coil temperature T of outdoor unit heat exchangeroWhen lower than second threshold, cut-off number is set as N2,
Wherein, second threshold is lower than first threshold, N2>N1>1。
4. the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition according to claim 3, which is characterized in that when
The cut-off number that sets is N1When, the motor is rotated according to the first wind-speed gear, when described sets cut-off number as N2
When, the motor is rotated according to the second wind-speed gear；First wind-speed gear is middle wind-speed gear, second wind-speed gear
For low wind-speed gear.
5. the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition according to claim 4, which is characterized in that institute
Stating first threshold is 14 DEG C, and the setting ends number N1=8, the second threshold is 10 DEG C, and the setting ends number N2=
48。
6. also being wrapped according to the control method of outdoor fan under the described in any item air conditioner cryogenic refrigeration operating conditions of claim 3 to 5
Include following steps:
As the coil temperature T of the outdoor unit heat exchangeroWhen lower than third threshold value, the motor stopping；
As the coil temperature T of the outdoor unit heat exchangeroAfter rising and being higher than the first threshold, the motor restarting.
7. the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition according to claim 6, which is characterized in that institute
Stating third threshold value is 0 DEG C.
8. the control method of outdoor fan under air conditioner cryogenic refrigeration operating condition according to claim 7, which is characterized in that institute
Voltage control signal is stated to export by an output port of outdoor controller.
9. a kind of air conditioner, which is characterized in that control low temperature system using control method as claimed in any one of claims 1 to 8
Outdoor fan under cold operating condition.
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| CN201611237928.7A CN106705364B (en) | 2016-12-28 | 2016-12-28 | The control method and air conditioner of outdoor fan under air conditioner cryogenic refrigeration operating condition |
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| CN201611237928.7A CN106705364B (en) | 2016-12-28 | 2016-12-28 | The control method and air conditioner of outdoor fan under air conditioner cryogenic refrigeration operating condition |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168033A (en) * | 2017-11-20 | 2018-06-15 | 珠海格力电器股份有限公司 | Blower control method, device, control circuit and air-conditioning |
| CN108917093A (en) * | 2018-06-26 | 2018-11-30 | Tcl空调器(中山)有限公司 | A kind of control method and control device of air conditioner anti-frost protection |
| CN110486901B (en) * | 2019-08-02 | 2021-07-23 | 青岛海尔空调器有限总公司 | Method and device for low-temperature refrigeration |
| CN112994543B (en) * | 2021-04-19 | 2022-07-22 | 追觅创新科技(苏州)有限公司 | Control method and system for rotating speed of direct current brush motor, storage medium and blower |
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| CN2140114Y (en) * | 1992-11-10 | 1993-08-11 | 中国科学院上海冶金研究所 | Universal speed regulation switch for fan |
| CN201476221U (en) * | 2009-09-09 | 2010-05-19 | 广东欧科空调制冷有限公司 | Low-temperature refrigeration control device of air conditioner one-phase motor |
| CN104791966A (en) * | 2015-04-09 | 2015-07-22 | 广东美的制冷设备有限公司 | Air conditioner and low-temperature cooling control method and device of air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3794212B2 (en) * | 1999-07-30 | 2006-07-05 | 株式会社日立製作所 | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2140114Y (en) * | 1992-11-10 | 1993-08-11 | 中国科学院上海冶金研究所 | Universal speed regulation switch for fan |
| CN201476221U (en) * | 2009-09-09 | 2010-05-19 | 广东欧科空调制冷有限公司 | Low-temperature refrigeration control device of air conditioner one-phase motor |
| CN104791966A (en) * | 2015-04-09 | 2015-07-22 | 广东美的制冷设备有限公司 | Air conditioner and low-temperature cooling control method and device of air conditioner |
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