CN106196428A - Air-conditioner and anti-freeze control method thereof - Google Patents
Air-conditioner and anti-freeze control method thereof Download PDFInfo
- Publication number
- CN106196428A CN106196428A CN201610510360.5A CN201610510360A CN106196428A CN 106196428 A CN106196428 A CN 106196428A CN 201610510360 A CN201610510360 A CN 201610510360A CN 106196428 A CN106196428 A CN 106196428A
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- Prior art keywords
- conditioner
- air
- heat exchanger
- temperature
- power
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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
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
Abstract
The invention discloses a kind of air-conditioner and anti-freeze control method thereof, said method comprising the steps of: when air-conditioner runs with refrigeration or dehumidification mode, obtain indoor fan power, and the Guan Wen of sensing chamber's external heat exchanger；According to indoor fan power judge indoor heat exchanger do not occur dirty stifled time, acquisition outdoor heat exchanger largest tube temperature in air-conditioner start operation the first Preset Time is as the first temperature value, and obtains the Guan Wen of outdoor heat exchanger using as the second temperature value every the second Preset Time after the first Preset Time；Calculate the absolute value of difference between the first temperature value and the second temperature value, and judge whether indoor heat exchanger freezes according to absolute value；If indoor heat exchanger freezes, then air-conditioner is carried out anti-freeze protection and controls.The method, by detecting the common of the Guan Wen of the indoor fan power of air-conditioner and outdoor heat exchanger, can accurately judge whether air-conditioner freezes, it is ensured that the refrigeration of air-conditioner, improves Consumer's Experience.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly to anti-freeze control method and a kind of air-conditioning of a kind of air-conditioner
Device.
Background technology
At present, when air-conditioner is applied to some special occasions, as at outdoor environment temperature than time relatively low more in a chiller mode
During operation, the indoor heat exchanger in air-conditioner is easy to frosting and icing, thus affects the properly functioning of air-conditioner.Generally, when
When indoor heat exchanger frosting occurs and freezes, air-conditioner will perform anti-freeze defencive function.Anti-freeze protection in air-conditioner
Effect is to prevent indoor heat exchanger pipe temperature too low, causes liquid refrigerant to enter compressor, causes compressor hydraulic compression to damage.
In correlation technique, when air-conditioner in a chiller mode or dehumidification mode run time, it is judged that air-conditioner is the need of entrance
The detection method of anti-freeze protection is: in indoor set start and after compressor start certain time, the pipe of detection indoor heat exchanger
Temperature, after detecting that in continuous a period of time, the Guan Wen of indoor heat exchanger is less than or equal to a certain preset value, controls air-conditioner and enters
Anti-freeze is protected.
Correspondingly, it is judged that air-conditioner the need of the detection method exiting anti-freeze protection is: enter antifreeze at air-conditioner
After knot protection, continue the Guan Wen, the Guan Wen great of indoor heat exchanger in continuous a period of time being detected of detection indoor heat exchanger
After another preset value, controlling air-conditioner and exit anti-freeze protection, indoor set recovers the running status before entering anti-freeze protection.
But, in actual use, or vaporizer little at indoor/outdoor temperature-difference dirty stifled very serious in the case of, due to sky
Adjust device when judging whether indoor set enters or exit anti-freeze protection, take into consideration only the Guan Wenyu preset value of indoor heat exchanger
Magnitude relationship, it is judged that excessively simple, easily cause and on indoor heat exchanger, but enter the false judgment that anti-freeze is protected without ice.This
Planting false judgment and on the one hand the maintenance work of maintainer can cause misleading, the use that on the other hand can reduce user is comfortable
Degree.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention
One purpose is to propose the anti-freeze control method of a kind of air-conditioner, and the method is by the indoor fan power to air-conditioner
With the common detection of the Guan Wen of outdoor heat exchanger, can accurately judge whether air-conditioner freezes, it is ensured that the refrigeration of air-conditioner
Effect, improves Consumer's Experience.
Further object is that a kind of air-conditioner of proposition.
For achieving the above object, one aspect of the present invention embodiment proposes the anti-freeze control method of a kind of air-conditioner, institute
The method of stating comprises the following steps: when described air-conditioner in a chiller mode or dehumidification mode run time, obtain the room of described air-conditioner
Inner blower power, and detect the Guan Wen of the outdoor heat exchanger of described air-conditioner；Described sky is judged according to described indoor fan power
Adjust device indoor heat exchanger do not occur dirty stifled time, obtain described outdoor heat exchanger described air-conditioner start run first preset time
Interior largest tube temperature is as the first temperature value, and presets every second after described air-conditioner runs described first Preset Time
Time obtains the Guan Wen of described outdoor heat exchanger using as the second temperature value；Calculate described first temperature value and described second temperature
The absolute value of the temperature gap between value, and the indoor heat exchanger of described air-conditioner is judged according to the absolute value of described temperature gap
Whether freeze；If the indoor heat exchanger of described air-conditioner freezes, then described air-conditioner is carried out anti-freeze protection
Control.
The anti-freeze control method of air-conditioner according to embodiments of the present invention, when air-conditioner in a chiller mode or dehumidification mode
During operation, first, obtain the indoor fan power of air-conditioner, and detect the Guan Wen of the outdoor heat exchanger of air-conditioner.Then, according to
Indoor fan power judge air-conditioner indoor heat exchanger do not occur dirty stifled time, obtain outdoor heat exchanger air-conditioner start run
Largest tube temperature in first Preset Time is as the first temperature value and pre-every second after air-conditioner runs the first Preset Time
If the time obtains the Guan Wen of outdoor heat exchanger using as the second temperature value.Finally, calculate the first temperature value and the second temperature value it
Between the absolute value of temperature gap, and judge whether the indoor heat exchanger of air-conditioner freezes according to the absolute value of temperature gap
Knot, if the indoor heat exchanger of air-conditioner freezes, then carries out anti-freeze protection and controls air-conditioner.Thus, the method is led to
Cross the common detection of the Guan Wen of the indoor fan power to air-conditioner and outdoor heat exchanger, can accurately judge whether air-conditioner is sent out
Life is freezed, it is ensured that the refrigeration of air-conditioner, improves Consumer's Experience.
According to one embodiment of present invention, the indoor heat exchanger of described air-conditioner is judged according to described indoor fan power
Do not occur dirty stifled, including: obtain described indoor fan when the boot running time of described air-conditioner reaches three Preset Times
Power runs power as first, and obtains described room when the boot running time of described air-conditioner reaches four Preset Times
Inner blower power is to run power as second, and wherein, described 4th Preset Time is more than described 3rd Preset Time；Judge institute
State whether the first operation power runs power less than or equal to described second；If described first runs power less than or equal to described the
Two run power, then judge that the indoor heat exchanger of described air-conditioner does not occurs dirty stifled.
According to one embodiment of present invention, judge that the indoor of described air-conditioner are changed according to the absolute value of described temperature gap
Whether hot device freezes, including: judge that whether the absolute value of described temperature gap is more than predetermined threshold value；If described temperature difference
The absolute value of value more than described predetermined threshold value, then judges that described indoor heat exchanger freezes.
According to one embodiment of present invention, when described air-conditioner is started shooting, also detection outdoor environment temperature and acquisition institute
State the operation power of air-conditioner, wherein, if described outdoor environment temperature is more than or equal to the first preset temperature and/or described air-conditioning
The operation power of device is more than or equal to the first predetermined power, then after described air-conditioner boot running time reaches the 5th Preset Time
Whether freeze to judge to described indoor heat exchanger.
According to one embodiment of present invention, described air-conditioner is carried out anti-freeze protection and controls, including: control described sky
Adjust the compressor shutdown of device, and the outdoor fan controlling described air-conditioner is out of service, and control the indoor of described air-conditioner
Blower fan runs with preset rotation speed.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of air-conditioner, including: off-premises station, described
Off-premises station includes compressor, outdoor fan and outdoor heat exchanger；Indoor set, described indoor set includes indoor heat exchanger and indoor wind
Machine；Electric control gear, described electric control gear includes: acquisition module, is used for obtaining indoor fan power；First temperature detecting module,
For detecting the Guan Wen of described outdoor heat exchanger；Control module, at described air-conditioner, in a chiller mode or dehumidification mode is transported
Judge whether described indoor heat exchanger occurs according to described indoor fan power during row dirty stifled, and do not send out at described indoor heat exchanger
Raw dirty stifled time obtain largest tube temperature that described outdoor heat exchanger runs in the first Preset Time in the start of described air-conditioner as the
One temperature value, and change every the second described outdoor of Preset Time acquisition after described air-conditioner runs described first Preset Time
The Guan Wen of hot device is using as the second temperature value, and calculates the temperature gap between described first temperature value and described second temperature value
Absolute value, and to described air-conditioner when judging that described indoor heat exchanger freezes according to the absolute value of described temperature gap
Carry out anti-freeze protection to control.
The air-conditioner of the embodiment of the present invention, air-conditioner in a chiller mode or dehumidification mode run time, first, by obtain
Module obtains indoor fan power, and by the Guan Wen of the first temperature detecting module sensing chamber external heat exchanger.Then, control module
Judge whether indoor heat exchanger occurs according to indoor fan power dirty stifled, and indoor heat exchanger do not occur dirty stifled time obtain outdoor
Heat exchanger largest tube temperature in air-conditioner start operation the first Preset Time is as the first temperature value, and runs at air-conditioner
Obtain the Guan Wen of outdoor heat exchanger using as the second temperature value every the second Preset Time after first Preset Time, and calculate first
The absolute value of the temperature gap between temperature value and the second temperature value, and judge indoor heat exchange according to the absolute value of temperature gap
Air-conditioner carries out when device freezes anti-freeze protection control.Thus, by indoor fan power and outdoor heat exchanger
The common detection of Guan Wen, can accurately judge whether air-conditioner freezes, it is ensured that the refrigeration of air-conditioner, improve user's body
Test.
According to one embodiment of present invention, described control module is judging that described coil temperature is less than or equal to described the
When one temperature threshold and lasting first Preset Time, control described air-conditioner and enter described anti-freeze protected mode.
According to one embodiment of present invention, described control module, it is additionally operable to the boot running time at described air-conditioner
Reach during three Preset Times, to obtain described indoor fan power and run power as first, and in the start fortune of described air-conditioner
The row time reaches to obtain during four Preset Times described indoor fan power to run power as second, and described first
Judge that the indoor heat exchanger of described air-conditioner does not occurs when running power less than or equal to described second operation power dirty stifled, wherein,
Described 4th Preset Time is more than described 3rd Preset Time.
According to one embodiment of present invention, described control module, it is additionally operable to judge that the absolute value of described temperature gap is
No more than predetermined threshold value, and judge that described indoor heat exchanger is sent out when the absolute value of described temperature gap is more than described predetermined threshold value
Life is freezed.
According to one embodiment of present invention, described air-conditioner also includes: the second temperature detecting module, for sensing chamber
External environment temperature, wherein, described control module is additionally operable to obtain the operation power of described air-conditioner, and in described outdoor environment temperature
When degree is more than or equal to the first predetermined power more than or equal to the operation power of the first preset temperature and/or described air-conditioner, if institute
Stating after air-conditioner boot running time reaches the 5th Preset Time, whether described indoor heat exchanger is frozen by described control module
Knot judges.
According to one embodiment of present invention, when described air-conditioner being carried out anti-freeze protection and controlling, described control mould
Block controls described compressor shutdown, and it is out of service to control described outdoor fan, and controls described indoor fan with default turn
Speed is run.
Accompanying drawing explanation
The present invention above-mentioned and/or that add aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially with easy to understand, wherein,
Fig. 1 is the flow chart of the anti-freeze control method of air-conditioner according to embodiments of the present invention；
Fig. 2 is the flow chart of the anti-freeze control method of the air-conditioner according to one concrete example of the present invention；
Fig. 3 is the block diagram of air conditioner structure according to an embodiment of the invention；And
Fig. 4 is the structure block diagram of air-conditioner in accordance with another embodiment of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
The air-conditioner proposed according to embodiments of the present invention and anti-freeze control method thereof are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the anti-freeze control method of air-conditioner according to an embodiment of the invention.As it is shown in figure 1,
The anti-freeze control method of this air-conditioner comprises the following steps:
S1, when air-conditioner is in a chiller mode or time dehumidification mode runs, obtains the indoor fan power of air-conditioner, and detects
Pipe temperature T1 of the outdoor heat exchanger of air-conditioner.
S2, according to indoor fan power judge air-conditioner indoor heat exchanger do not occur dirty stifled time, obtain outdoor heat exchanger
Largest tube temperature T1 in the first preset time t 1 is run in air-conditioner startMAXAs the first temperature value, and run the at air-conditioner
Pipe temperature T1 of outdoor heat exchanger is obtained every the second preset time t 2 using as the second temperature value after one preset time t 1.Wherein,
First preset time t 1 and the second preset time t 2 can be demarcated according to practical situation, and such as, the first preset time t 1 can
Thinking 20min, the second preset time t 2 can be 2min, and obtains pipe temperature T1 of outdoor heat exchanger as the second temperature value
Number of times can be 10 or 20 etc..
According to one embodiment of present invention, judge that the indoor heat exchanger of air-conditioner does not occurs dirty according to indoor fan power
Stifled, including: the boot running time at air-conditioner obtains indoor fan power using as first when reaching three preset time t 3
Run power P 1, and obtain when the boot running time of air-conditioner reaches four preset time t 4 indoor fan power using as
Second runs power P 2；Then, it is determined that first runs whether power P 1 runs power P 2 less than or equal to second, if first runs
Power less than or equal to the second operation power, then judges that the indoor heat exchanger of air-conditioner does not occurs dirty stifled.Wherein, the 4th Preset Time
T4 is more than the 3rd preset time t 3, and the 3rd preset time t 3 and the 4th preset time t 4 can be demarcated according to practical situation,
Here it is not specifically limited.
S3, calculates the absolute value T of temperature gap between the first temperature value and the second temperature value, and according to temperature gap
Absolute value T judges whether the indoor heat exchanger of air-conditioner freezes.
According to one embodiment of present invention, whether the indoor heat exchanger of air-conditioner is judged according to the absolute value of temperature gap
Freeze, including: judge whether the absolute value T of temperature gap is more than predetermined threshold value T0, if the absolute value T of temperature gap is big
In predetermined threshold value T0, then judge that indoor heat exchanger freezes.Wherein, T0 can demarcate according to practical situation.
S4, if the indoor heat exchanger of air-conditioner freezes, then carries out anti-freeze protection and controls air-conditioner.
According to one embodiment of present invention, air-conditioner is carried out anti-freeze protection and controls, including: control the pressure of air-conditioner
Contracting machine is shut down, and the outdoor fan controlling air-conditioner is out of service, and the indoor fan controlling air-conditioner is transported with preset rotation speed
OK.Wherein, preset rotation speed can be demarcated according to practical situation.
It is to say, when air-conditioner in a chiller mode or dehumidification mode run time, the boot running time at air-conditioner reaches
During to three preset time t 3, obtain indoor fan power and run power P 1 as first, and when the start of air-conditioner runs
Between when reaching four preset time t 4, obtain indoor fan power to run power P 2 as second.Then, it is determined that whether meet
P1≤P2, if be unsatisfactory for, then judges that the indoor heat exchanger of air-conditioner occurs dirty stifled, then before air-conditioner is started shooting, 20min does not sentences
Determine whether air-conditioner freezes；And if it is satisfied, then judge that the indoor heat exchanger of air-conditioner does not occurs dirty blocking up, and now judges sky
Adjust whether device freezes.
Obtain largest tube temperature T1 of the outdoor heat exchanger started shooting in the front 20min run at air-conditionerMAXUsing as the first temperature
Angle value, and run at air-conditioner and obtain the instantaneous value of pipe temperature T1 of outdoor heat exchanger using as the second temperature every 2min after 20min
Angle value, obtaining number of times can be 10 or 20, and calculates the absolute of temperature gap between the first temperature value and the second temperature value
Value T, T=| T1MAX-T1 |, and judge that the absolute value T of temperature gap, whether more than predetermined threshold value T0, if T is ＞ T0, illustrates complete machine
Running abnormal, indoor heat exchanger has occurred and that and freezes, and now air-conditioner can be carried out anti-freeze protection, as controlled air-conditioner
Compressor shutdown, and the outdoor fan controlling air-conditioner is out of service, and control the indoor fan of air-conditioner with preset rotation speed
Run.
Further, if the growth that the absolute value T of temperature gap is in time is gradually increased, illustrate that indoor heat exchanger occurs
Seriously freeze, now need air-conditioner is carried out anti-freeze protection, as controlled the compressor shutdown of air-conditioner, and control air-conditioner
Outdoor fan is out of service, and the indoor fan controlling air-conditioner runs with preset rotation speed.
And if T ＜ T0, then it is assumed that indoor heat exchanger freezes, and air-conditioner is properly functioning with preset mode, and
This operation no longer detects and judges whether indoor heat exchanger freezes, until start next time.Thus, the method can be accurate
Judge whether air-conditioner freezes, it is to avoid occur indoor heat exchanger dirty stifled to judge into indoor heat exchanger and freeze, thus
Maintainer is caused misleading.
It addition, be the subjective feeling taking into full account user, improve user's experience, in embodiments of the present invention, at sky
When adjusting device start, also detection outdoor environment temperature and the operation power of acquisition air-conditioner, wherein, if outdoor environment temperature is more than
It is more than or equal to the first predetermined power equal to the operation power of the first preset temperature and/or air-conditioner, then runs in air-conditioner start
Whether indoor heat exchanger is freezed to judge after reaching the 5th preset time t 5 by the time.Wherein, the first preset temperature,
One predetermined power and the 5th preset time t 5 can be demarcated according to practical situation, and such as, the first preset temperature can be 30 DEG C, the
Five preset time t 5 can be 20min.
It is to say, when air-conditioner is started shooting, if outdoor environment temperature is more than or equal to 30 DEG C, or the operation of air-conditioner
Power is more than or equal to the first predetermined power (the most powerful refrigeration), or outdoor environment temperature is more than or equal to 30 DEG C and the fortune of air-conditioner
Row power is more than or equal to the first predetermined power, then before air-conditioner runs in 20min in whether indoor heat exchanger is not occurred
Freeze to judge, and when the operation time of air-conditioner reaches 20min, start to judge whether indoor heat exchanger freezes.
In order to make those skilled in the art be more clearly understood that, the present invention, Fig. 2 are the skies according to one concrete example of the present invention
Adjust the flow chart of the anti-freeze control method of device.As in figure 2 it is shown, this control method comprises the following steps:
S101, air-conditioner is in a chiller mode or dehumidification mode runs.
S102, detection outdoor environment temperature and the operation power of acquisition air-conditioner.
S103, it is judged that whether outdoor environment temperature is more than or equal to 30 DEG C or the operation power of air-conditioner is more than or equal to first
Predetermined power.If it is, perform step S104；If it does not, perform step S105.
S104, air-conditioner continues to run with 20min with present mode.
S105, obtains the indoor fan power of air-conditioner, and detects pipe temperature T1 of the outdoor heat exchanger of air-conditioner.
S106, obtain when the boot running time at air-conditioner reaches three preset time t 3 indoor fan power using as
First runs power P 1, and obtain when the boot running time of air-conditioner reaches four preset time t 4 indoor fan power with
Power P 2 is run as second.
S107, it is determined whether P1≤P2.If it is, perform step S109；If it does not, perform step S108.
S108, it is determined that the indoor heat exchanger of air-conditioner occurs dirty stifled, and air-conditioner continues to run with 20min with present mode.
S109, it is determined that the indoor heat exchanger of air-conditioner does not occurs dirty stifled, obtains outdoor heat exchanger and runs in air-conditioner start
Largest tube temperature T1 in 20minMAXUsing as the first temperature value, and after air-conditioner runs 20min, obtain outdoor every 2min change
Pipe temperature T1 of hot device is using as the second temperature value.
S110, calculates the absolute value T, T=of temperature gap between the first temperature value and the second temperature value | T1MAX-T1|。
S111, it is judged that T, whether more than predetermined threshold value T0, if it is, explanation indoor heat exchanger freezes, performs step
S112；If it does not, explanation indoor heat exchanger freezes, perform step S113.
S112, controls the compressor shutdown of air-conditioner, and the outdoor fan controlling air-conditioner is out of service, and controls sky
The indoor fan adjusting device runs with preset rotation speed.
S113, air-conditioner is properly functioning with preset mode, and this operation no longer detects and judges that indoor heat exchanger is
No freeze, until start next time.
In sum, the anti-freeze control method of air-conditioner according to embodiments of the present invention, when air-conditioner in a chiller mode
Or during dehumidification mode operation, first, obtain the indoor fan power of air-conditioner, and detect the pipe of the outdoor heat exchanger of air-conditioner
Temperature.Then, according to indoor fan power judge air-conditioner indoor heat exchanger do not occur dirty stifled time, obtain outdoor heat exchanger at sky
Adjust the largest tube temperature in the first Preset Time of device start operation using as the first temperature value and default in air-conditioner operation first
The Guan Wen of outdoor heat exchanger is obtained using as the second temperature value every the second Preset Time after time.Finally, the first temperature is calculated
The absolute value of the temperature gap between value and the second temperature value, and judge that the indoor of air-conditioner are changed according to the absolute value of temperature gap
Whether hot device freezes, if the indoor heat exchanger of air-conditioner freezes, then air-conditioner carries out anti-freeze protection and controls.
Thus, the method, by detecting the common of the Guan Wen of the indoor fan power of air-conditioner and outdoor heat exchanger, can accurately be sentenced
Whether disconnected air-conditioner freezes, it is ensured that the refrigeration of air-conditioner, improves Consumer's Experience.
Fig. 3 is the block diagram of air conditioner structure according to an embodiment of the invention.As it is shown on figure 3, this air-conditioner
Including: off-premises station 10, indoor set 20 and electric control gear 30.
Wherein, off-premises station 10 includes compressor 101, outdoor fan 102 and outdoor heat exchanger 103.Indoor set 20 includes room
Interior heat exchanger 201 and indoor fan 202.Electric control gear 30 includes: acquisition module 301, for obtaining the merit of indoor fan 202
Rate；First temperature detecting module 302, for pipe temperature T1 of sensing chamber's external heat exchanger 103；Control module 303, at air-conditioner
In a chiller mode or judge whether indoor heat exchanger 201 occurs according to the power of indoor fan 202 time dehumidification mode runs dirty stifled,
And indoor heat exchanger 201 do not occur dirty stifled time obtain outdoor heat exchanger 103 air-conditioner start run the first preset time t 1
Interior largest tube temperature T1MAXAs the first temperature value, and after air-conditioner runs the first preset time t 1 when second presets
Between t2 obtain pipe temperature T1 of outdoor heat exchanger 103 using as the second temperature value, and calculate the first temperature value and the second temperature value it
Between the absolute value T of temperature gap, and when judging that indoor heat exchanger 201 freezes according to the absolute value T of temperature gap pair
Air-conditioner carries out anti-freeze protection and controls.Wherein, the first preset time t 1 and the second preset time t 2 can be according to practical situations
Demarcating, such as, the first preset time t 1 can be 20min, and the second preset time t 2 can be 2min, and control module
303 to obtain pipe temperature T1 of outdoor heat exchangers as the number of times of the second temperature value can be 10 or 20 etc..
Further, in embodiments of the present invention, control module 303 is additionally operable to reach in the boot running time of air-conditioner
During three preset time t 3, the power obtaining indoor fan 202 runs power P 1 as first, and in the start operation of air-conditioner
When time reaches four preset time t 4, the power of acquisition indoor fan 202 is to run power P 2 as second, and first
Judge that the indoor heat exchanger 201 of air-conditioner does not occurs when running power P 1 less than or equal to the second operation power P 2 dirty stifled, wherein, the
Four Preset Times are more than described 3rd Preset Time.4th preset time t 4 is more than the 3rd preset time t 3, the 3rd Preset Time
T3 and the 4th preset time t 4 can be demarcated according to practical situation, are not specifically limited here.
According to one embodiment of present invention, control module 30 is additionally operable to judge whether the absolute value T of temperature gap is more than
Predetermined threshold value T0, and judge that when the absolute value T of temperature gap is more than predetermined threshold value T0 indoor heat exchanger 201 freezes.
Specifically, when air-conditioner in a chiller mode or dehumidification mode run time, the boot running time at air-conditioner reaches
During three preset time t 3, acquisition module 301 obtains the power of indoor fan 202 to run power P 1 as first, and at sky
When the boot running time adjusting device reaches four preset time t 4, obtain the power of indoor fan 202 to run merit as second
Rate P2.Then, control module 303 judges whether to meet P1≤P2 according to P1 and P2, if be unsatisfactory for, then control module 303 is sentenced
The indoor heat exchanger 201 determining air-conditioner occurs dirty stifled, then control module 303 20min before air-conditioner is started shooting does not judges air-conditioner
Whether freeze；And if it is satisfied, then control module 303 judges that the indoor heat exchanger 201 of air-conditioner does not occurs dirty blocking up, now
Control module 303 judges whether air-conditioner freezes.
Control module 303 obtains the largest tube temperature of the outdoor heat exchanger 103 in the front 20min that air-conditioner start runs
T1MAXUsing as the first temperature value, and after air-conditioner runs 20min, obtain pipe temperature T1 of outdoor heat exchanger 103 every 2min
Instantaneous value is using as the second temperature value, and obtaining number of times can be 10 or 20, and calculate the first temperature value and the second temperature value it
Between the absolute value T, T=of temperature gap | T1MAX-T1 |, and judge whether the absolute value T of temperature gap is more than predetermined threshold value T0,
If T is ＞ T0, illustrating that complete machine runs abnormal, indoor heat exchanger 201 has occurred and that and freezes, and now control module 303 can be to sky
Adjust device to carry out anti-freeze protection to control.
Further, if the growth that the absolute value T of temperature gap is in time is gradually increased, indoor heat exchanger is described
201 occur seriously to freeze, and now control module 303 needs air-conditioner carries out anti-freeze protection control.
And if T ＜ T0, then it is assumed that indoor heat exchanger 201 freezes, and air-conditioner is properly functioning with preset mode, and
And this operation no longer detects and judges whether indoor heat exchanger freezes, until start next time.Thus, the method can be accurate
Really judge whether air-conditioner freezes, it is to avoid indoor heat exchanger is occurred dirty stifled to judge into indoor heat exchanger and freeze by air-conditioner
Knot, thus maintainer is caused misleading.
In embodiments of the present invention, when air-conditioner carrying out anti-freeze protection and controlling, control module 303 controls compressor
Shut down, and it is out of service to control outdoor fan 102, and control room inner blower 202 runs with preset rotation speed.
It is to say, when control module 303 judges the absolute value T of temperature gap more than predetermined threshold value T0, indoor are described
Heat exchanger 201 freezes, and now control module 303 controls compressor shutdown, and it is out of service to control outdoor fan 102, with
And control room inner blower 202 runs with preset rotation speed.
It addition, be the subjective feeling taking into full account user, improve user's experience, in embodiments of the present invention, such as Fig. 4
Shown in, above-mentioned air-conditioner also includes: the second temperature detecting module 40, is used for detecting outdoor environment temperature, wherein, and control module
303 are additionally operable to obtain the operation power of air-conditioner, and at outdoor environment temperature more than or equal to the first preset temperature and/or air-conditioner
Operation power more than or equal to the first predetermined power time, if after air-conditioner boot running time reaches the 5th preset time t 5,
Whether indoor heat exchanger 201 is freezed to judge by control module 303.Wherein, the first preset temperature, the first predetermined power
Can demarcate according to practical situation with the 5th preset time t 5, such as, the first preset temperature can be 30 DEG C, the 5th Preset Time
T5 can be 20min.
It is to say, when air-conditioner is started shooting, if the second temperature detecting module 40 detects that outdoor environment temperature is more than
Equal to 30 DEG C, or the operation power of air-conditioner that control module 303 obtains is more than or equal to the first predetermined power (i.e. air-conditioner
Freeze powerful), or the second temperature detecting module 40 detects that outdoor environment temperature is more than or equal to 30 DEG C and control module 303 obtains
The operation power of the air-conditioner taken is more than or equal to the first predetermined power, then before air-conditioner runs in 20min in not to indoor
Whether heat exchanger freezes judges, and when the operation time of air-conditioner reaches 20min, starts to judge indoor heat exchanger
Whether freeze.
In sum, the air-conditioner of the embodiment of the present invention, at air-conditioner in a chiller mode or time dehumidification mode runs, first
First, obtain indoor fan power by acquisition module, and by the Guan Wen of the first temperature detecting module sensing chamber external heat exchanger.So
After, according to indoor fan power, control module judges whether indoor heat exchanger occurs dirty stifled, and does not occurs dirty at indoor heat exchanger
Time stifled, acquisition outdoor heat exchanger largest tube temperature in air-conditioner start operation the first Preset Time is as the first temperature value, and
The Guan Wen of outdoor heat exchanger is obtained using as the second temperature every the second Preset Time after air-conditioner runs the first Preset Time
Value, and calculate the absolute value of temperature gap between the first temperature value and the second temperature value, and absolute according to temperature gap
Value judges that air-conditioner carries out when indoor heat exchanger freezes anti-freeze protection to be controlled.Thus, this air-conditioner is by indoor wind
The common detection of the Guan Wen of acc power and outdoor heat exchanger, can accurately judge whether air-conditioner freezes, it is ensured that air-conditioner
Refrigeration, improve Consumer's Experience.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. the anti-freeze control method of an air-conditioner, it is characterised in that comprise the following steps:
When described air-conditioner in a chiller mode or dehumidification mode run time, obtain the indoor fan power of described air-conditioner, and examine
Survey the Guan Wen of the outdoor heat exchanger of described air-conditioner；
According to described indoor fan power judge described air-conditioner indoor heat exchanger do not occur dirty stifled time, obtain described outdoor and change
Hot device runs the largest tube temperature in the first Preset Time as the first temperature value in the start of described air-conditioner, and at described air-conditioner
The Guan Wen of described outdoor heat exchanger is obtained using as the second temperature every the second Preset Time after running described first Preset Time
Value；
Calculate the absolute value of temperature gap between described first temperature value and described second temperature value, and according to described temperature difference
The absolute value of value judges whether the indoor heat exchanger of described air-conditioner freezes；
If the indoor heat exchanger of described air-conditioner freezes, then described air-conditioner is carried out anti-freeze protection and controls.
2. the anti-freeze control method of air-conditioner as claimed in claim 1, it is characterised in that according to described indoor fan power
Judge that the indoor heat exchanger of described air-conditioner does not occurs dirty stifled, including:
Described indoor fan power is obtained as first when the boot running time of described air-conditioner reaches three Preset Times
Run power, and obtain when the boot running time of described air-conditioner reaches four Preset Times described indoor fan power with
Running power as second, wherein, described 4th Preset Time is more than described 3rd Preset Time；
Judge that described first runs whether power runs power less than or equal to described second；
If described first runs power runs power less than or equal to described second, then judge the indoor heat exchanger of described air-conditioner
Do not occur dirty stifled.
3. the anti-freeze control method of air-conditioner as claimed in claim 1 or 2, it is characterised in that according to described temperature gap
Absolute value judge described air-conditioner indoor heat exchanger whether freeze, including:
Judge that whether the absolute value of described temperature gap is more than predetermined threshold value；
If the absolute value of described temperature gap is more than described predetermined threshold value, then judge that described indoor heat exchanger freezes.
4. the anti-freeze control method of air-conditioner as claimed in claim 1, it is characterised in that when described air-conditioner is started shooting,
Also detection outdoor environment temperature and the operation power of the described air-conditioner of acquisition, wherein,
If described outdoor environment temperature is more than or equal to more than or equal to the operation power of the first preset temperature and/or described air-conditioner
First predetermined power, then after described air-conditioner boot running time reaches the 5th Preset Time to described indoor heat exchanger whether
Freeze to judge.
5. the anti-freeze control method of the air-conditioner as according to any one of claim 1-4, it is characterised in that to described air-conditioning
Device carries out anti-freeze protection and controls, including:
Control the compressor shutdown of described air-conditioner, and the outdoor fan controlling described air-conditioner is out of service, and control institute
The indoor fan stating air-conditioner runs with preset rotation speed.
6. an air-conditioner, it is characterised in that including:
Off-premises station, described off-premises station includes compressor, outdoor fan and outdoor heat exchanger；
Indoor set, described indoor set includes indoor heat exchanger and indoor fan；
Electric control gear, described electric control gear includes:
Acquisition module, is used for obtaining indoor fan power；
First temperature detecting module, for detecting the Guan Wen of described outdoor heat exchanger；
Control module, for described air-conditioner in a chiller mode or dehumidification mode run time sentence according to described indoor fan power
Whether fixed described indoor heat exchanger occurs dirty stifled, and described indoor heat exchanger do not occur dirty stifled time obtain described outdoor heat exchanger
Largest tube temperature in described air-conditioner start operation the first Preset Time is as the first temperature value, and transports at described air-conditioner
The Guan Wen of described outdoor heat exchanger is obtained using as the second temperature value every the second Preset Time after described first Preset Time of row,
And calculate the absolute value of temperature gap between described first temperature value and described second temperature value, and according to described temperature difference
The absolute value of value judges that described air-conditioner carries out when described indoor heat exchanger freezes anti-freeze protection to be controlled.
7. air-conditioner as claimed in claim 6, it is characterised in that described control module, is additionally operable to opening at described air-conditioner
The machine operation time reaches to obtain described indoor fan power during three Preset Times and runs power as first, and at described air-conditioning
The boot running time of device reaches to obtain during four Preset Times described indoor fan power to run power as second, and
Run when power runs power less than or equal to described second described first and judge that the indoor heat exchanger of described air-conditioner does not occurs
Dirty stifled, wherein, described 4th Preset Time is more than described 3rd Preset Time.
Air-conditioner the most as claimed in claims 6 or 7, it is characterised in that described control module, is additionally operable to judge described temperature difference
Whether the absolute value of value is more than predetermined threshold value, and judges described when the absolute value of described temperature gap is more than described predetermined threshold value
Indoor heat exchanger freezes.
9. air-conditioner as claimed in claim 6, it is characterised in that also include:
Second temperature detecting module, is used for detecting outdoor environment temperature, and wherein, described control module is additionally operable to obtain described air-conditioning
The operation power of device, and at described outdoor environment temperature more than or equal to the first preset temperature and/or the operation merit of described air-conditioner
When rate is more than or equal to the first predetermined power, if after described air-conditioner boot running time reaches the 5th Preset Time, described control
Whether described indoor heat exchanger is freezed to judge by molding block.
10. the air-conditioner as according to any one of claim 6-9, it is characterised in that described air-conditioner is being carried out anti-freeze
When protection controls, described control module controls described compressor shutdown, and it is out of service to control described outdoor fan, and controls
Described indoor fan runs with preset rotation speed.
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| CN201610510360.5A CN106196428B (en) | 2016-07-01 | 2016-07-01 | Air conditioner and its anti-freeze control method |
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| CN201610510360.5A CN106196428B (en) | 2016-07-01 | 2016-07-01 | Air conditioner and its anti-freeze control method |
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