CN109084443A - A kind of condenser for outdoor unit of air conditioner frosting suppressing method and air-conditioning - Google Patents
A kind of condenser for outdoor unit of air conditioner frosting suppressing method and air-conditioning Download PDFInfo
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- CN109084443A CN109084443A CN201810836090.6A CN201810836090A CN109084443A CN 109084443 A CN109084443 A CN 109084443A CN 201810836090 A CN201810836090 A CN 201810836090A CN 109084443 A CN109084443 A CN 109084443A
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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
-
- 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
-
- 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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- 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
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a kind of condenser for outdoor unit of air conditioner frosting suppressing method and air-conditionings, include the following steps: S1: outdoor fan operates normally when air-conditioning is in heating mode；S2: real-time detection outdoor environment temperature Toa, outdoor air relative humidity φ and outdoor condenser coil temperature Tp；S3: according to ToaDew-point temperature T is obtained by psychrometric chart fitting function with φd；S4: judge TpWhether T is not higher thand, S5 is executed if to be, otherwise executes S2；S5: suppression frost control: control outdoor fan promotes revolving speed and Positive work.The present invention can accurately judge heat pamp and environment and effectively inhibit the attachment of frostwork, significantly delayed heat pamp, greatly reduced the frequency of defrosting, and reducing leads to the time of fluctuations in indoor temperature because shutting down defrosting, improve the comfort of air-conditioning.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to a kind of condenser for outdoor unit of air conditioner frosting suppressing method and sky
It adjusts.
Background technique
With the increasingly raising of people's living standard, air conditioner has become the indispensable electric appliance of each family, air conditioner
Refrigeration or heating operations are actually to be absorbed in heat pump heating operation by outdoor condenser in the process for carrying out heat exchange
The heat of outside, air-conditioning system transfer heat to indoor and carry out heat release.When air-conditioning is heated, when outside heat exchange
Device fin temperature is lower than air dew point temperature, and fin surface starts condensed water, when fin surface temperature is below the freezing point temperature, no
It can avoid frost occur, frosting is phase transition phenomena, can release big calorimetric, has just begun with and has been conducive to heat exchange, but since frost is
The non-conductor of heat can hinder outdoor heat exchanger heat-transfer capability as frost layer increases, when frost thickness increases up to influence outdoor
Air flowing and when heat exchange, indoor heating ability declines rapidly, and air-conditioning system can be commutated by four-way valve, from indoor heat absorption to
Outdoor heat release removes the frost on outdoor condenser.Therefore, in heating, outdoor condenser can frequent frosting defrost, will cause
Fluctuations in indoor temperature affects the comfort of air-conditioning.
A kind of control method for alleviating frosting of outdoor condenser of air conditioner is disclosed in patent of invention CN101975440B, is led to
Cross whether detection interior evaporator coil temperature T1 meets, T1 >=N, wherein 31 DEG C≤N≤50 DEG C, if it is, continuing to test
Outdoor condenser coil temperature T2, otherwise carries out defrosting processing to outdoor condenser；When T2≤0 DEG C and certain time, then
Fan motor rotational speed inside and outside regulation room carries out that outdoor condenser frosting is delayed to handle, and by above-mentioned processing, is guaranteeing that interior is normal
Heat pamp is delayed after heating effect.Although this control method has certain effect to inhibition condensation frosting, to frosting
The judgement of time and environment is relatively rough, only by outdoor condenser coil temperature to determine whether inhibiting frosting, Bu Neng
The first time of frosting removes hoar crystal, and inhibiting frosting, the effect is unsatisfactory.
In addition, having it is demonstrated experimentally that frost layer is based on the generation of dendritic frostwork, only by increase due to frosting initial stage
Rotation speed of the fan, only unidirectional wind-force can not often completely inhibit the attachment of frostwork, can blow down the frostwork that short transverse increases
Or blow to far from tuyere position, so that frost layer successively thickens in one direction, and the effect is unsatisfactory for delaying frosting, more
Not easy-clear.
Summary of the invention
For the deficiency in the presence of the prior art, the present invention provide it is a kind of can accurate judgement frosting environment, can be effective
Inhibit the attachment of frostwork, significantly delay heat pamp, extend the effectively heating time, reduces because shutting down defrosting to room temperature wave
The condenser for outdoor unit of air conditioner frosting suppressing method and air-conditioning of dynamic influence, promotion air conditioning comfortableness.
A kind of condenser for outdoor unit of air conditioner frosting suppressing method, includes the following steps:
S1: when air-conditioning is in heating mode, outdoor fan is operated normally；
S2: real-time detection outdoor environment temperature Toa, outdoor air relative humidity φ and outdoor condenser coil temperature Tp；
S3: according to outdoor environment temperature ToaCorresponding dew point is obtained by preset function with the relative humidity φ of outdoor air
Temperature Td；
S4: judge the outdoor condenser coil temperature TpThe temperature that whether is below the freezing point and be not higher than dew-point temperature TdOnce
To be to execute S5, S2 is otherwise returned to step；
S5: press down frost control: control outdoor fan promotes revolving speed, and with the revolving speed Positive work after promotion.
Further, following steps are first carried out before executing S5:
S41: judge that the time carries out timing according to preset suppression frost, if outdoor condenser coil temperature described in timing course
TpConsistently lower than freezing point temperature and be not higher than dew-point temperature Td, then air-conditioning enters suppression frost control after timing, executes step S5；
Otherwise S2 is returned to step.
Further, include the following steps:
S6: when the Positive work of outdoor fan reaches the preset first suppression frost control time, to T this momentpSentenced
It is disconnected: if TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then follow the steps S7；Otherwise air-conditioning stops suppression frost control, outdoor wind
Machine restores to operate normally, and returns to step S2；
S7: judged: if the revolving speed of outdoor fan reaches preset revolving speed upper limit threshold, air-conditioner continuous is with the revolving speed
It runs up to and reaches defrosting condition, air-conditioning enters defrosting control, and this method terminates；Otherwise S5 is returned to step.
Further, include the following steps:
S6: when the Positive work of outdoor fan reaches the preset first suppression frost control time, to T this momentpSentenced
It is disconnected: if TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then follow the steps S7；Otherwise air-conditioning stops suppression frost control, outdoor wind
Machine restores to operate normally, and returns to step S2；
S7: judged: if the revolving speed of outdoor fan reaches preset revolving speed upper limit threshold, entering second level suppression frost control
System executes step S8；Otherwise S5 is returned to step；
S8: second level suppression frost control: control outdoor fan is taken turns according to preset Positive work time and antiport time
Stream carries out Positive work and antiport and recycles execution；
S9: pressing down in white control process in the second level, once TpNot less than freezing point temperature or it is higher than dew-point temperature TdIt is lasting when
Between be more than the preset second suppression frost control time, then stop second level suppression frost control, outdoor fan restores to operate normally, and return holds
Row step S2；Otherwise remaining operational the control of second level suppression frost until reaching defrosting condition, then air-conditioning stops second level suppression frost control,
It is controlled into defrosting, this method terminates.
A kind of air-conditioning, including outdoor fan, further includes:
Control unit, the outdoor environment temperature T for being detected according to temperature sensoroaWith the outdoor of humidity sensor detection
The relative humidity φ of air obtains corresponding dew-point temperature T by preset functiond；The outdoor condensation detected according to temperature sensor
Device coil temperature TpJudge whether to be below the freezing point temperature and is not higher than the dew-point temperature Td, if so then execute white control instruction is pressed down,
I.e. control outdoor fan promotes revolving speed and with the revolving speed Positive work after promotion；
Temperature sensor, for condenser coil temperature and outdoor environment temperature outside real-time detection room, and by temperature information
It is sent to control unit；
Humidity sensor is sent to control list for the relative humidity φ of real-time detection outdoor air, and by humidity information
Member；
Memory module, for saving preset value, including preset function.
Further, further includes:
Control unit, the outdoor environment temperature T for being detected according to temperature sensoroaWith the outdoor of humidity sensor detection
The relative humidity φ of air obtains corresponding dew-point temperature T by preset functiond；The outdoor condensation detected according to temperature sensor
Device coil temperature TpJudge whether to be below the freezing point temperature and is not higher than the dew-point temperature TdIf then issuing instruction allows timing mould
Block carries out timing, if until timing terminates the temperature TpConsistently lower than freezing point temperature and be not higher than the dew-point temperature Td, then hold
It goes and presses down white control instruction, is i.e. control outdoor fan promotes revolving speed and with the revolving speed Positive work after promotion；
Timing module judges that the time carries out timing according to preset suppression frost when for receiving instruction；
Temperature sensor, for condenser coil temperature and outdoor environment temperature outside real-time detection room, and by temperature information
It is sent to control unit；
Humidity sensor is sent to control list for the relative humidity φ of real-time detection outdoor air, and by humidity information
Member；
Memory module, for saving preset value, including preset function and suppression frost judge the time.
Further, control unit is also used to when carrying out pressing down frost control, and the Positive work of outdoor fan reaches preset
To T when the first suppression frost control timepJudged:
1. if TpThe temperature that is below the freezing point and be not higher than the dew-point temperature Td, then judge: whether the revolving speed of outdoor fan reaches
Preset revolving speed upper limit threshold presses down white control instruction if otherwise executing if then continuing with revolving speed operation；When lasting with this turn
When speed operation reaches defrosting condition, then issues instruction and stop pressing down the instruction that frost controls and executes defrosting control；
2. if TpNot less than freezing point temperature or it is higher than the dew-point temperature Td, then issue instruction and stop suppression frost control, control room
Outer blower restores to operate normally；
Timing module is also used to carry out timing according to the preset first suppression frost control time in suppression frost control；
Memory module is also used to save the first suppression frost control time and revolving speed upper limit threshold.
Further, control unit is also used to when carrying out pressing down frost control, and the Positive work of outdoor fan reaches preset
To T when the first suppression frost control timepJudged:
1. if TpThe temperature that is below the freezing point and be not higher than the dew-point temperature Td, then judge: whether the revolving speed of outdoor fan reaches
Preset revolving speed upper limit threshold, if then issuing instruction enters second level suppression frost control, i.e. control outdoor fan is according to preset
Positive work time and antiport time carry out Positive work and antiport in turn and recycle execution, if otherwise executing suppression frost
Control instruction；Once pressing down T in white control process in the second levelpNot less than freezing point temperature or it is higher than dew-point temperature TdContinue
Time is more than the preset second suppression frost control time, then issues instruction and stop second level suppression frost control, control outdoor fan restores
It operates normally, after otherwise remaining operational second level suppression frost control until reaching defrosting condition, issues instruction and stop the control of suppression frost simultaneously
Execute the instruction of defrosting control；
2. if TpNot less than freezing point temperature or it is higher than the dew-point temperature Td, then issue instruction and stop suppression frost control, control room
Outer blower restores to operate normally；
Timing module is also used to carry out timing according to the preset first suppression frost control time in suppression frost control, described
Timing is carried out according to the preset second suppression frost control time when second level suppression frost control, is pressed down in frost control in the second level according to default
The Positive work time and the antiport time carry out timing；
Memory module is also used to save the first suppression frost control time, the second suppression frost control time, revolving speed upper limit threshold, just
To the duration of runs, antiport time.
Further, the revolving speed of outdoor fan using speedup according to quantity or is pressed than speedup in the suppression frost control, described to press
Revolving speed N≤the 50r/min promoted every time in amount speedup, it is described by than the ratio between the revolving speed after speedup in speedup and revolving speed before speedup
≤ 120%.
Further, the revolving speed upper limit threshold is set as the 150% of the outdoor fan rated speed.
Compared with the prior art, the invention has the following beneficial effects:
1, the data of dew-point temperature are obtained in real time by preset function, and to outdoor condenser coil temperature TpWith freezing point with
And corresponding dew-point temperature TdIt is compared, the combination judgement based on dew point and freezing point temperature can not only accurately judge that disk
Pipe starts time and the environment of frosting, just passes through outdoor fan speedup when hoar crystal has just started or will start condensation and operates
Mode effectively inhibit the generation of hoar crystal, the frequency into defrosting control is effectively reduced, improves the accuracy of frosting judgement；
2, the white effect of suppression is improved by improving rotation speed of fan step by step reduces the energy to the greatest extent while guaranteeing to press down white effect
Consumption and noise pollution, improve the comfort of user；
3, frost control is pressed down by setting two-stage, reverse circulation operating is increased on the basis of outdoor fan speedup presses down frost
Mode reinforces pressing down white control, can effectively inhibit the attachment of frostwork, significantly delay the time of frosting, greatly reduces defrosting
Frequency, reduce causes time of fluctuations in indoor temperature, to improve the comfort of user because shutting down defrosting.
Detailed description of the invention
Fig. 1 is the schematic process flow diagram of embodiment of the method 1；
Fig. 2 is the schematic process flow diagram of prioritization scheme in embodiment of the method 1；
Fig. 3 is the schematic process flow diagram of embodiment of the method 2；
Fig. 4 is the schematic process flow diagram of embodiment of the method 3；
Fig. 5 is the structural schematic diagram of Installation practice.
Specific embodiment
In order to which the technical means, creative features, achievable purpose and effectiveness for realizing invention are easy to understand, below with reference to
It is specifically illustrating, the present invention is further explained.
Embodiment of the method 1:
As shown in Figure 1, a kind of condenser for outdoor unit of air conditioner frosting suppressing method, includes the following steps:
S1: when air-conditioning is in heating mode, outdoor fan is operated normally；
S2: real-time detection outdoor environment temperature Toa, outdoor air relative humidity φ and outdoor condenser coil temperature Tp；
S3: according to outdoor environment temperature ToaCorresponding dew point is obtained by preset function with the relative humidity φ of outdoor air
Temperature Td；
S4: judge the outdoor condenser coil temperature TpWhether it is below the freezing point (normal atmosphere pressure takes 0 DEG C) and not high
In dew-point temperature Td, S5 is executed if to be, otherwise returns to step S2；
S5: press down frost control: control outdoor fan promotes revolving speed, and with the revolving speed Positive work after promotion.
The namely outdoor dry-bulb temperature of the outdoor environment temperature, the relative humidity of the outdoor air in embodiment may be used
It is substituted by outdoor wet-bulb temperature, no matter because can be used for outdoor environment temperature together by relative humidity or wet-bulb temperature
Corresponding dew-point temperature is obtained by preset function.Preset function described herein is empty by outdoor environment temperature and outdoor
Relative humidity (or the outdoor wet-bulb temperature T of gasow) input obtain the function of corresponding dew-point temperature output, can be by psychrometric chart
Corresponding data are fitted to obtain in (or the wet table of enthalpy).It is appreciated that air-conditioning equipment carries out intelligent control for convenience, it is described
Data in psychrometric chart can be stored on the memory inside air-conditioning by preset function by way of fitting function, this is existing
Already existing method in technology, can be there are many kinds of fit approach, can to the corresponding data in psychrometric chart as long as can reach
More accurately convert, therefore does not enumerate specific fitting function herein.The psychrometric chart generally may include dry-bulb temperature,
The data such as wet-bulb temperature, dew-point temperature, relative humidity, water capacity and enthalpy.Particularly, outdoor wind in suppression frost control described herein
The revolving speed of machine can be used speedup according to quantity or in the way of than speedup, and the revolving speed N promoted every time in the speedup according to quantity can choose
One be not more than 50r/min value, specific speedup value can be some definite value can also as the case may be depending on；It is described by than
Revolving speed can be promoted to 120% value of the revolving speed no more than before by speedup every time, and speedup ratio can be some definite value can also
Depending on as the case may be.
As coil temperature TpLower than Td, moisture can occur in a manner of condensing in air, with TpIt further decreases, when low
When freezing point temperature, frost will occur.According to the pertinent literature of research Frost formation process, Frost formation process is initially subcooled water
Pearl form, although frosting on a cold surface mechanism is extremely complex, frosting on a cold surface, which is substantially all, experienced droplet and generates, grows up, freezing, just
Beginning hoar crystal such as generates, grows up at the processes.As initial frost crystal is grown up, the access between fin can be blocked by intersection, cause wind speed fast
Speed decline, makes exchange capability of heat rapid decrease, if can delay or remove the unsubstantial hoar crystal in part, can keep the sky between fin
Air-flow is logical, continues heat-energy transducer.That is, there are two primary conditions for coil pipe frosting, first is that coil temperature is lower than dew-point temperature,
Otherwise it will not condense on coil pipe, it more will not frosting；Otherwise the temperature second is that coil temperature is below the freezing point condenses, no at most on coil pipe
It can frosting.In other words, if coil temperature be higher than dew-point temperature or freezing point any one, would not frosting on coil pipe.This reality
The method for applying example passes through to outdoor condenser coil temperature TpWith corresponding freezing point temperature and dew-point temperature TdIt is compared simultaneously,
It can not only accurately judge that coil pipe starts time and the environment of frosting, when hoar crystal has just started or will start condensation just
The generation for effectively inhibiting hoar crystal in such a way that outdoor fan speedup operates, is also effectively lowered into the frequency of defrosting control, mentions
The high accuracy of frosting judgement and the comfort of user.If coil temperature can be lifted higher than by this way
Dew-point temperature or freezing point temperature then illustrate that hoar crystal is stopped growing or removed, can stop pressing down white control at this time, outdoor fan is extensive
It is multiple to operate normally.
As shown in Fig. 2, as a further optimization of the scheme , including the following steps:
S1: when air-conditioning is in heating mode, outdoor fan is operated normally；
S2: real-time detection outdoor environment temperature Toa, outdoor air relative humidity φ and outdoor condenser coil temperature Tp；
S3: according to outdoor environment temperature ToaCorresponding dew point is obtained by preset function with the relative humidity φ of outdoor air
Temperature Td；
S4: judge the outdoor condenser coil temperature TpThe temperature that whether is below the freezing point and be not higher than dew-point temperature TdOnce
To be to execute S41, S2 is otherwise returned to step；
S41: judge that the time carries out timing according to preset suppression frost, if outdoor condenser coil temperature described in timing course
TpConsistently lower than freezing point temperature and be not higher than dew-point temperature Td, then air-conditioning enters suppression frost control after timing, executes step S5；
Otherwise S2 is returned to step.
S5: press down frost control: control outdoor fan promotes revolving speed, and with the revolving speed Positive work after promotion.
Suppression frost judges that the time can self-setting as the case may be, it is preferable that can choose one less than 150 seconds
Value.When suppression frost judges selection of time 0 second, this programme is to be reduced to skip the white side for judging timing and being directly entered suppression frost control of suppression
Case (scheme before optimizing).
In view of being possible to because certain accidental reasons cause coil temperature to generate error detection, in this way by entering suppression
A delay judgement is added before frost control, the accuracy to frosting judgement can be further increased, guarantees the steady of suppression frost control
It is qualitative.
Freezing point temperature herein can be the use environment before air-conditioning installation according to parameter settings such as ambient pressures
Locate zero boundary's point temperature of icing of water.
Embodiment of the method 2:
As shown in figure 3, a kind of condenser for outdoor unit of air conditioner frosting suppressing method, any scheme in embodiment of the method 1
On the basis of, further include following steps:
S6: when the Positive work of outdoor fan reaches the preset first suppression frost control time, to T this momentpSentenced
It is disconnected: if TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then follow the steps S7；Otherwise air-conditioning stops suppression frost control, outdoor wind
Machine restores to operate normally, and returns to step S2；
S7: judged: if the revolving speed of outdoor fan reaches preset revolving speed upper limit threshold, air-conditioner continuous is with the revolving speed
It runs up to and reaches defrosting condition, air-conditioning enters defrosting control, and this method terminates；Otherwise S5 is returned to step.
The preset first suppression frost control time can self-setting as the case may be, it is preferable that can choose one
A value less than 150 seconds.The revolving speed upper limit threshold can carry out different settings according to different choice of electrical machine, such as can be set as room
The 150% of outer blower rated speed.The prior art can be used in defrosting condition and defrosting control described herein, herein not
It repeats again.
The present embodiment by outdoor fan speedup suppression frost after according to TpJudge whether still locate at outdoor condenser coil pipe
Reinforced by the speedup step by step after gradually judging to frost crystal growth in the state of frost crystal growth, and after pressing down white a period of time
Inhibit.If frost crystal growth still cannot be inhibited when outdoor fan revolving speed reaches the preset rotation speed upper limit, at this time if should enter remove
Frost control is thoroughly to remove hoar crystal；Once outdoor fan revolving speed has made not giving birth at coil pipe before reaching the preset rotation speed upper limit
Long hoar crystal (i.e. coil temperature is higher than freezing point or dew point), then air-conditioning should exit suppression frost control, restore to operate normally.Can have in this way
Effect improves air-conditioning and presses down white control efficiency, is lowered into the frequency of defrosting control.
Embodiment of the method 3:
As shown in figure 4, a kind of condenser for outdoor unit of air conditioner frosting suppressing method, any scheme in embodiment of the method 1
On the basis of, further include following steps:
S6: when the Positive work of outdoor fan reaches the preset first suppression frost control time, to T this momentpSentenced
It is disconnected: if TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then follow the steps S7；Otherwise air-conditioning stops suppression frost control, outdoor wind
Machine restores to operate normally, and returns to step S2；
S7: judged: if the revolving speed of outdoor fan reaches preset revolving speed upper limit threshold, entering second level suppression frost control
System executes step S8；Otherwise S5 is returned to step；
S8: second level suppression frost control: control outdoor fan is taken turns according to preset Positive work time and antiport time
Stream carries out Positive work and antiport and recycles execution；
S9: pressing down in white control process in the second level, once TpNot less than freezing point temperature or it is higher than dew-point temperature TdIt is lasting when
Between be more than the preset second suppression frost control time, then stop second level suppression frost control, outdoor fan restores to operate normally, and return holds
Row step S2；Otherwise remaining operational the control of second level suppression frost until reaching defrosting condition, then air-conditioning stops second level suppression frost control,
It is controlled into defrosting, this method terminates.
The Positive work time and antiport time may be selected 5~60 seconds, preferably 20 seconds.
The present embodiment increases the second level suppression frost control on the basis of embodiment of the method 2, by outdoor fan revolving speed
Direct/Reverse cycle operation is carried out to control to realize that suppression is white, since traditional unidirectional wind-force only will more after reaching preset upper limit
More frostwork is blowed to far from tuyere position, so that frost layer successively thickens in one direction, and the bidirectional circulating wind-force in this method
It can solve this problem, can effectively inhibit the attachment of frostwork, significantly delay the time of frosting, greatly reduced defrosting
Frequency, reducing leads to the time of fluctuations in indoor temperature because shutting down defrosting, improves the comfort of air-conditioning.
Installation practice 1:
As shown in figure 5, a kind of air-conditioning, including outdoor fan, further includes:
Control unit, the outdoor environment temperature T for being detected according to temperature sensoroaWith the outdoor of humidity sensor detection
The relative humidity φ of air obtains corresponding dew-point temperature T by preset functiond；The outdoor condensation detected according to temperature sensor
Device coil temperature TpJudge whether to be below the freezing point temperature and is not higher than dew-point temperature Td, if so then execute white control instruction is pressed down, that is, control
Outdoor fan processed promotes revolving speed and with the revolving speed Positive work after promotion；
Temperature sensor, for when air-conditioning be in heating mode outside real-time detection room condenser coil temperature and outdoor ring
Border temperature, and control unit is sent by temperature information；
Humidity sensor, for the relative humidity φ of the real-time detection outdoor air when air-conditioning is in heating mode, and will
Humidity information is sent to control unit；
Memory module, for saving preset value, including preset function.
Described control unit is connect with temperature sensor, humidity sensor and memory module respectively.
The method as described in the scheme of embodiment of the method 1 may be implemented in device in the present embodiment.Control described herein
Unit can be using MCU or PLC etc..
Installation practice 2:
As shown in figure 5, a kind of air-conditioning, including outdoor fan, further includes:
Control unit, the outdoor environment temperature T for being detected according to temperature sensoroaWith the outdoor of humidity sensor detection
The relative humidity φ of air obtains corresponding dew-point temperature T by preset functiond；The outdoor condensation detected according to temperature sensor
Device coil temperature TpJudge whether to be below the freezing point temperature and is not higher than dew-point temperature TdIf then issue instruction allow timing module into
Row timing, if until timing terminates the temperature TpAlways it is not higher than the dew-point temperature Td, then the white control instruction of suppression is executed, i.e.,
It controls outdoor fan and promotes revolving speed and with the revolving speed Positive work after promotion；
Timing module judges that the time carries out timing according to preset suppression frost when for receiving instruction；
Temperature sensor, for when air-conditioning be in heating mode outside real-time detection room condenser coil temperature and outdoor ring
Border temperature, and control unit is sent by temperature information；
Humidity sensor, for the relative humidity φ of the real-time detection outdoor air when air-conditioning is in heating mode, and will
Humidity information is sent to control unit；
Memory module, for saving preset value, including preset function and suppression frost judge the time.
Described control unit is connect with timing module, temperature sensor, humidity sensor and memory module respectively.
The method as described in prioritization scheme in embodiment of the method 1 may be implemented in device in the present embodiment.The suppression frost is sentenced
The disconnected time can be preferably 100~150 seconds.
Installation practice 3:
As shown in figure 5, on the basis of any air-conditioning described in Installation practice 1 or 2:
Control unit is also used to when carrying out pressing down frost control, and the Positive work of outdoor fan reaches preset first suppression frost
To T when controlling the timepJudged:
1. if TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then judge: whether the revolving speed of outdoor fan reaches default
Revolving speed upper limit threshold, if then continuing to press down white control instruction if otherwise executing with revolving speed operation；When lasting with revolving speed fortune
When row reaches defrosting condition, then issues instruction and stop the white instruction controlled and execute defrosting control of suppression；
2. if TpNot less than freezing point temperature or it is higher than the dew-point temperature Td, then issue instruction and stop suppression frost control, control room
Outer blower restores to operate normally；
Timing module is also used to carry out timing according to the preset first suppression frost control time in suppression frost control；
Memory module is also used to save the first suppression frost control time and revolving speed upper limit threshold.
Described control unit is connect with timing module, temperature sensor, humidity sensor and memory module respectively.
The method as described in embodiment of the method 2 may be implemented in device in the present embodiment.The suppression frost judges that the time can
To be preferably 100~150 seconds.The revolving speed upper limit threshold can carry out different settings according to different choice of electrical machine, such as can set
It is the 80~95% of outdoor fan maximum (top) speed.
It is appreciated that controlling the defrosting that whether enters in this article, whether reach except through the revolving speed of outdoor fan
Preset rotation speed upper limit threshold is outer to judge, can also mention according to whether the promotion number of outdoor fan revolving speed reaches preset revolving speed
Frequency threshold value is risen to judge；It is appreciated that can also further judge together by above-mentioned two threshold value, reach two as long as meeting
Any of threshold value can enter defrosting control.
Installation practice 4:
As shown in figure 5, on the basis of any air-conditioning described in Installation practice 1 or 2:
Control unit is also used to when carrying out pressing down frost control, and the Positive work of outdoor fan reaches preset first suppression frost
To T when controlling the timepJudged:
1. if TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then judge: whether the revolving speed of outdoor fan reaches default
Revolving speed upper limit threshold, if then issue instruction enter the second level suppression frost control, i.e., control outdoor fan according to preset forward direction
The duration of runs and antiport time carry out Positive work and antiport in turn and recycle execution, if otherwise executing suppression frost control
Instruction；Once pressing down T in white control process in the second levelpNot less than freezing point temperature or it is higher than dew-point temperature TdDuration
More than the preset second suppression frost control time, then issues instruction and stop second level suppression frost control, control outdoor fan restores normal
Operation after otherwise remaining operational the white control of second level suppression until reaching defrosting condition, issues instruction stopping suppression frost and controls and execute
Defrost the instruction controlled；
2. if TpNot less than freezing point temperature or it is higher than the dew-point temperature Td, then issue instruction and stop suppression frost control, control room
Outer blower restores to operate normally；
Timing module is also used to carry out timing according to the preset first suppression frost control time in suppression frost control, described
Timing is carried out according to the preset second suppression frost control time when second level suppression frost control, is pressed down in frost control in the second level according to default
The Positive work time and the antiport time carry out timing；
Memory module is also used to save the first suppression frost control time, the second suppression frost control time, revolving speed upper limit threshold, just
To the duration of runs, antiport time.
Described control unit is connect with timing module, temperature sensor, humidity sensor and memory module respectively.
The method as described in embodiment of the method 3 may be implemented in device in the present embodiment.When the first suppression frost control
Between and the second suppression frost control time can as the case may be with need freely set, such as first suppression it is white control the time can
To be preferably 100~150 seconds, the second suppression frost control time is preferably 10~120 seconds.The revolving speed upper limit threshold can basis
Different choice of electrical machine carry out different settings, for example, can be set as outdoor fan rated speed 150% or maximum (top) speed 80~
95%.The Positive work time and antiport time can between 5~60 seconds value；Particularly, when the Positive work
Between and the antiport time be preferably 20 seconds.
The foregoing is merely the preferred embodiment of the present invention, protection scope of the present invention is not limited in above-mentioned embodiment party
Formula, all technical solutions for belonging to the principle of the invention all belong to the scope of protection of the present invention.For those skilled in the art and
Speech, several improvement carried out without departing from the principles of the present invention, these improvement also should be regarded as protection model of the invention
It encloses.
Claims (10)
1. a kind of condenser for outdoor unit of air conditioner frosting suppressing method, it is characterised in that include the following steps:
S1: when air-conditioning is in heating mode, outdoor fan is operated normally；
S2: real-time detection outdoor environment temperature Toa, outdoor air relative humidity φ and outdoor condenser coil temperature Tp；
S3: according to outdoor environment temperature ToaCorresponding dew-point temperature is obtained by preset function with the relative humidity φ of outdoor air
Td；
S4: judge the outdoor condenser coil temperature TpThe temperature that whether is below the freezing point and be not higher than dew-point temperature TdOnce being yes
S5 is then executed, S2 is otherwise returned to step；
S5: press down frost control: control outdoor fan promotes revolving speed, and with the revolving speed Positive work after promotion.
2. a kind of condenser for outdoor unit of air conditioner frosting suppressing method according to claim 1, which is characterized in that executing S5
Following steps are first carried out before:
S41: judge that the time carries out timing according to preset suppression frost, if the T of outdoor condenser coil temperature described in timing coursepBegin
The temperature that is below the freezing point eventually and be not higher than dew-point temperature Td, then air-conditioning enters suppression frost control after timing, executes step S5；Otherwise
Return to step S2.
3. described in any item a kind of condenser for outdoor unit of air conditioner frosting suppressing methods according to claim 1~2, it is characterised in that
Include the following steps:
S6: when the Positive work of outdoor fan reaches the preset first suppression frost control time, to T this momentpJudged: if
TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then follow the steps S7；Otherwise air-conditioning stops suppression frost control, and outdoor fan is extensive
It is multiple to operate normally, return to step S2；
S7: judged: if the revolving speed of outdoor fan reaches preset revolving speed upper limit threshold, air-conditioner continuous is with revolving speed operation
Until reaching defrosting condition, air-conditioning enters defrosting control, and this method terminates；Otherwise S5 is returned to step.
4. described in any item a kind of condenser for outdoor unit of air conditioner frosting suppressing methods according to claim 1~2, it is characterised in that
Include the following steps:
S6: when the Positive work of outdoor fan reaches the preset first suppression frost control time, to T this momentpJudged: if
TpThe temperature that is below the freezing point and be not higher than dew-point temperature Td, then follow the steps S7；Otherwise air-conditioning stops suppression frost control, and outdoor fan is extensive
It is multiple to operate normally, return to step S2；
S7: judged: if the revolving speed of outdoor fan reaches preset revolving speed upper limit threshold, entering second level suppression frost control,
Execute step S8；Otherwise S5 is returned to step；
S8: second level suppression frost control: control outdoor fan is flowed into according to preset Positive work time and antiport time wheel
Row Positive work and antiport simultaneously recycle execution；
S9: pressing down in white control process in the second level, once TpNot less than freezing point temperature or it is higher than dew-point temperature TdDuration it is super
The preset second suppression frost control time is spent, then stops second level suppression frost control, outdoor fan restores to operate normally, and return executes step
Rapid S2；Otherwise the control of second level suppression frost is remained operational until reaching defrosting condition, then air-conditioning stops second level suppression frost control, enters
Defrosting control, this method terminate.
5. a kind of air-conditioning, including outdoor fan, it is characterised in that further include:
Control unit, the outdoor environment temperature T for being detected according to temperature sensoroaWith the outdoor air of humidity sensor detection
Relative humidity φ corresponding dew-point temperature T is obtained by preset functiond；The outdoor condenser pan detected according to temperature sensor
Tube temperature degree TpJudge whether to be below the freezing point temperature and is not higher than the dew-point temperature Td, if so then execute white control instruction is pressed down, that is, control
Outdoor fan processed promotes revolving speed and with the revolving speed Positive work after promotion；
Temperature sensor for condenser coil temperature and outdoor environment temperature outside real-time detection room, and temperature information is sent
To control unit；
Humidity sensor for the relative humidity φ of real-time detection outdoor air, and sends control unit for humidity information；
Memory module, for saving preset value, including preset function.
6. a kind of air-conditioning, including outdoor fan, it is characterised in that further include:
Control unit, the outdoor environment temperature T for being detected according to temperature sensoroaWith the outdoor air of humidity sensor detection
Relative humidity φ corresponding dew-point temperature T is obtained by preset functiond；The outdoor condenser pan detected according to temperature sensor
Tube temperature degree TpJudge whether to be below the freezing point temperature and is not higher than the dew-point temperature TdIf then issue instruction allow timing module into
Row timing, if until timing terminates the temperature TpConsistently lower than freezing point temperature and be not higher than the dew-point temperature Td, then suppression is executed
White control instruction, i.e. control outdoor fan promote revolving speed and with the revolving speed Positive works after promotion；
Timing module judges that the time carries out timing according to preset suppression frost when for receiving instruction；
Temperature sensor for condenser coil temperature and outdoor environment temperature outside real-time detection room, and temperature information is sent
To control unit；
Humidity sensor for the relative humidity φ of real-time detection outdoor air, and sends control unit for humidity information；
Memory module, for saving preset value, including preset function and suppression frost judge the time.
7. according to a kind of described in any item air-conditionings of claim 5~6, it is characterised in that:
Control unit is also used to when carrying out pressing down frost control, and the Positive work of outdoor fan reaches preset first suppression frost control
To T when the timepJudged:
1. if TpThe temperature that is below the freezing point and be not higher than the dew-point temperature Td, then judge: whether the revolving speed of outdoor fan reaches default
Revolving speed upper limit threshold, if then continuing to press down white control instruction if otherwise executing with revolving speed operation；When lasting with revolving speed fortune
When row reaches defrosting condition, then issues instruction and stop the white instruction controlled and execute defrosting control of suppression；
2. if TpNot less than freezing point temperature or it is higher than the dew-point temperature Td, then issue instruction and stop suppression frost control, control room exogenous wind
Machine restores to operate normally；
Timing module is also used to carry out timing according to the preset first suppression frost control time in suppression frost control；
Memory module is also used to save the first suppression frost control time and revolving speed upper limit threshold.
8. according to a kind of described in any item air-conditionings of claim 5~6, it is characterised in that:
Control unit is also used to when carrying out pressing down frost control, and the Positive work of outdoor fan reaches preset first suppression frost control
To T when the timepJudged:
1. if TpThe temperature that is below the freezing point and be not higher than the dew-point temperature Td, then judge: whether the revolving speed of outdoor fan reaches default
Revolving speed upper limit threshold, if then issue instruction enter the second level suppression frost control, i.e., control outdoor fan according to preset forward direction
The duration of runs and antiport time carry out Positive work and antiport in turn and recycle execution, if otherwise executing suppression frost control
Instruction；Once pressing down T in white control process in the second levelpNot less than freezing point temperature or it is higher than dew-point temperature TdDuration
More than the preset second suppression frost control time, then issues instruction and stop second level suppression frost control, control outdoor fan restores normal
Operation after otherwise remaining operational the white control of second level suppression until reaching defrosting condition, issues instruction stopping suppression frost and controls and execute
Defrost the instruction controlled；
2. if TpNot less than freezing point temperature or it is higher than the dew-point temperature Td, then issue instruction and stop suppression frost control, control room exogenous wind
Machine restores to operate normally；
Timing module is also used to carry out timing according to the preset first suppression frost control time in suppression frost control, described second
Grade suppression frost control when according to it is preset second suppression frost control the time carry out timing, the second level press down frost control according to it is preset just
Timing is carried out to the duration of runs and antiport time；
Memory module is also used to save the first suppression frost control time, the second suppression frost control time, revolving speed upper limit threshold, positive fortune
Turn time, antiport time.
9. a kind of described in any item condenser for outdoor unit of air conditioner frosting suppressing methods or claim 4 according to claim 1~3
A kind of~6 described in any item air-conditionings, it is characterised in that:
The revolving speed of outdoor fan is mentioned in the speedup according to quantity every time using speedup according to quantity or by than speedup in the suppression frost control
Revolving speed N≤the 50r/min risen, it is described by than the ratio between the revolving speed after speedup in speedup and revolving speed before speedup≤120%.
10. according to a kind of described in any item condenser for outdoor unit of air conditioner frosting suppressing methods of claim 2~3 or claim
A kind of 5~6 described in any item air-conditionings, it is characterised in that:
The revolving speed upper limit threshold is set as the 150% of the outdoor fan rated speed.
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| CN201810836090.6A CN109084443B (en) | 2018-07-26 | 2018-07-26 | Air conditioner outdoor unit condenser frosting inhibition method and air conditioner |
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| CN112880125A (en) * | 2021-01-22 | 2021-06-01 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN112902407A (en) * | 2021-01-28 | 2021-06-04 | 四川长虹空调有限公司 | Method for controlling operation frequency of variable frequency air conditioner through outdoor humidity |
| CN112902407B (en) * | 2021-01-28 | 2022-04-22 | 四川长虹空调有限公司 | Method for controlling operation frequency of variable frequency air conditioner through outdoor humidity |
| CN113028591A (en) * | 2021-02-05 | 2021-06-25 | 宁波奥克斯电气股份有限公司 | Air conditioner frosting delaying method, control device and air conditioner |
| CN113568073A (en) * | 2021-07-27 | 2021-10-29 | Oppo广东移动通信有限公司 | Electronic device, thermal comfort detection method, detection device, and storage medium |
| CN113587366A (en) * | 2021-08-12 | 2021-11-02 | 广东积微科技有限公司 | Air conditioner heating frostless control method and system thereof |
| CN113739353A (en) * | 2021-09-22 | 2021-12-03 | 宁波奥克斯电气股份有限公司 | Air conditioner control method, air conditioner and computer readable storage medium |
| CN114646130A (en) * | 2022-03-14 | 2022-06-21 | 青岛海尔空调器有限总公司 | Control method and control system for defrosting of air conditioner, electronic equipment and storage medium |
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