CN106958926A - Air-conditioner and its defrosting control method - Google Patents
Air-conditioner and its defrosting control method Download PDFInfo
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- CN106958926A CN106958926A CN201710327167.2A CN201710327167A CN106958926A CN 106958926 A CN106958926 A CN 106958926A CN 201710327167 A CN201710327167 A CN 201710327167A CN 106958926 A CN106958926 A CN 106958926A
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- conditioner
- defrosting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to air-conditioning technical field, it is intended to solve the problem of existing air-conditioning can not select optimal defrosting mode in defrosting according to the frost thickness on ambient temperature condition and air-conditioner outdoor unit.Therefore, the present invention provides a kind of air-conditioner and its defrosting control method, this method comprises the following steps：Compare outdoor environment temperature and the first preset temperature；If outdoor environment temperature is more than or equal to the first preset temperature, control air-conditioner bypass defrosting；If outdoor environment temperature is less than the first preset temperature, judge whether the frost thickness on air-conditioner outdoor unit meets preparatory condition；If frost thickness meets preparatory condition, control air-conditioner bypass defrosting；If frost thickness is unsatisfactory for preparatory condition, control air-conditioner refrigeration defrosting.In the case that the present invention can be higher or lower in outdoor environment temperature, or the frost layer on air-conditioner outdoor unit is thicker or relatively thin, it can use optimal defrosting mode, it is ensured that the comfortableness of indoor environment, improve the heating effect of air-conditioning.
Description
Technical field
The invention belongs to air-conditioning technical field, and in particular to a kind of air-conditioner and its defrosting control method.
Background technology
Air-conditioner is as a kind of equipment that can adjust indoor environment temperature, its operation principle：Followed by refrigerant
Cause indoor environment temperature reduction between endless tube road by the State Transferring of high voltage/low voltage/gaseous state/liquid or raise, i.e.,
From the perspective of indoor set, air-conditioner is in refrigeration or heating condition.Under heating condition, the outdoor unit of air-conditioner (steams
Send out device) outer coil pipe on easily frosting, outer coil pipe frosting can cause the hydraulic performance decline of refrigeration system, so as to influence the system of air-conditioner
Thermal effect, reduces the comfortableness of indoor environment, influences Consumer's Experience.Therefore, in the case of air-conditioner is in heating condition,
Need to carry out air-conditioner timely and effective defrosting.
To solve the problems, such as the frosting of air-conditioner, Publication No. CN103486783A patent of invention discloses a kind of " air-conditioning
Device system and its defrosting control method ".Specifically, the control method of above-mentioned patent is when air-conditioning meets defrost condition, first
Bypass defrosting is carried out, decides whether to carry out the tangential defrost of air-conditioning four-way valve further according to the number of times and temperature conditionss of bypass defrosting
(i.e. kind of refrigeration cycle defrost), so as to realize by the switching of bypass defrosting and refrigeration mode defrost to reach the purpose of defrosting.But
It is that above-mentioned control method can not be selected when defrost starts according to the frost thickness on ambient temperature condition and air-conditioner outdoor unit
Optimal defrosting mode is selected, if the frost layer on outdoor unit is thicker, frost layer can not be removed by bypass defrosting clean.And
And, the defrost efficiency of bypass defrosting is often relatively low, it is therefore desirable to the defrost time it is longer, it is necessary to consume more electric energy, it is unfavorable
In the saving energy.In addition, if the frost layer on outdoor unit is relatively thin, bypass defrosting there is also asking for frequent defrost or false defrost
Topic.
Therefore, this area needs a kind of defrosting control method of new air-conditioner to solve the above problems.
The content of the invention
It has been that the existing air-conditioning of solution can not be according to ambient temperature in defrosting to solve above mentioned problem of the prior art
The problem of frost thickness in condition and air-conditioner outdoor unit is to select optimal defrosting mode, the invention provides a kind of air-conditioner
Defrosting control method, the defrosting control method comprises the following steps：When air-conditioner meets defrosting condition, compare outdoor environment
Temperature and the first preset temperature；If outdoor environment temperature is more than or equal to the first preset temperature, control air-conditioner performs bypass
Defrosting mode；If outdoor environment temperature is less than the first preset temperature, judge whether frost thickness meets preparatory condition；If frost layer
Thickness meets preparatory condition, then controls air-conditioner to perform bypass defrosting mode；If frost thickness is unsatisfactory for preparatory condition, control
Air-conditioner performs refrigeration defrosting mode.
In the optimal technical scheme of above-mentioned defrosting control method, preparatory condition includes judging the dew point of ambient outdoor air
Whether temperature and the difference of outdoor unit coil temperature are less than or equal to the second preset temperature；If the dew point temperature of ambient outdoor air
The difference of degree and outdoor unit coil temperature is less than or equal to the second preset temperature, then frost thickness meets preparatory condition；If room
The dew-point temperature of external environment air is more than the second preset temperature with the difference of outdoor unit coil temperature, then frost thickness is unsatisfactory for pre-
If condition.
In the optimal technical scheme of above-mentioned defrosting control method, above-mentioned defrosting control method is additionally included in air-conditioner execution
During bypassing defrosting mode, judge whether outdoor unit coil temperature is more than or equal to the dew-point temperature of ambient outdoor air, and
Whether the duration that outdoor unit coil temperature is more than or equal to the dew-point temperature of ambient outdoor air reaches the first preset time；
If outdoor unit coil temperature be more than or equal to the dew-point temperature of ambient outdoor air and the duration reach first it is default when
Between, then control air-conditioner to exit bypass defrosting mode；If outdoor unit coil temperature is less than the dew-point temperature of ambient outdoor air,
Or outdoor unit coil temperature be more than or equal to the dew-point temperature of ambient outdoor air but the duration be not up to first it is default when
Between, then control air-conditioner persistently to bypass defrosting mode.
In the optimal technical scheme of above-mentioned defrosting control method, above-mentioned defrosting control method also includes：Held in air-conditioner
During row refrigeration defrosting mode, judge whether frost thickness meets preparatory condition；If frost thickness meets preparatory condition, control
Air-conditioner processed switches to bypass defrosting mode；If frost thickness is unsatisfactory for preparatory condition, control air-conditioner, which persistently freezes, to be removed
White pattern.
In the optimal technical scheme of above-mentioned defrosting control method, by control by-passing valve unlatching/closing of air-conditioner with
Make the into/out bypass defrosting mode of air-conditioner, and in the compressor raising frequency into control air-conditioner when bypassing defrosting mode；
The compressor frequency reducing of air-conditioner is controlled when exiting bypass defrosting mode.
In the optimal technical scheme of above-mentioned defrosting control method, control air-conditioner four-way valve commutate by way of come
Make the into/out refrigeration defrosting mode of air-conditioner, and close by-passing valve when entering refrigeration defrosting mode and control air-conditioning
Indoor set is shut down；By-passing valve and control indoor apparatus of air conditioner start are opened when exiting refrigeration defrosting mode.
In the optimal technical scheme of above-mentioned defrosting control method, the defrosting condition of above-mentioned air-conditioner includes：In air-conditioning
During heating circulation, outdoor unit coil temperature is less than the dew-point temperature of ambient outdoor air, and outdoor unit coil temperature is less than room
The duration of the dew-point temperature of external environment air reaches the second preset time.
In the optimal technical scheme of above-mentioned defrosting control method, the first preset temperature is 0 DEG C.
In the optimal technical scheme of above-mentioned defrosting control method, the second preset temperature is 3 DEG C.
On the other hand, the present invention provides a kind of air-conditioner, and air-conditioner is including in compressor, air-conditioner outdoor unit, air conditioning chamber
Machine and four-way valve, compressor, air-conditioner outdoor unit and indoor apparatus of air conditioner are sequentially connected to form closed loop, and four-way valve can pass through commutation
Mode makes air-conditioner be in refrigeration or heating condition, and air-conditioner also includes：Bypass circulation, it is arranged at compressor and air conditioning chamber
By-passing valve is provided between outer machine, and on bypass circulation；Control unit, it can be using the defrosting control any one of above-mentioned
Method makes by-passing valve unlatching/close and/or make four-way valve commutate.
It will be appreciated to those of skill in the art that in the preferred technical solution of the present invention, when air-conditioning starts defrosting,
By judging outdoor environment temperature, bypass defrosting is directly selected when outdoor environment temperature is more than or equal to 0 DEG C, in outdoor environment
Temperature determines whether the dew-point temperature of ambient outdoor air and the differential temperature of outdoor unit coil temperature when being less than 0 DEG C, at this
Differential temperature may determine that the frost layer on now air-conditioner outdoor unit is relatively thin when being less than or equal to 3 DEG C, should use bypass defrosting mode,
It may determine that the frost layer on now air-conditioner outdoor unit is thicker when the differential temperature is more than 3 DEG C, can not using bypass defrosting mode
Frost layer is thoroughly removed, should be using refrigeration defrosting mode.In the control method of the present invention, by judging different temperature strips
Part, can select optimal defrosting mode, when the frost layer on air-conditioner outdoor unit is relatively thin, can avoid the occurrence of frequent defrost or
The problem of false defrost, when the frost layer on air-conditioner outdoor unit is thicker, frost layer can be removed totally by the way that kind of refrigeration cycle is rapid.Cause
This, the present invention is either higher or lower in outdoor environment temperature, or the frost layer on air-conditioner outdoor unit is thicker or relatively thin
In the case of, optimal defrosting mode can be used, so as to ensure that the comfortableness of indoor environment, heating for air-conditioning is improved
Effect.
Brief description of the drawings
Fig. 1 is the flow chart of the defrosting control method of the air-conditioner of the present invention；
Fig. 2 is the structural representation of the air-conditioner of the present invention.
Embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining the know-why of the present invention, it is not intended that limit the scope of the invention.
It should be noted that in the description of the invention, term " first " and " second " are only used for describing purpose, and can not
It is interpreted as indicating or implying relative importance.
Can not be according to ambient temperature condition and air conditioning chamber in defrosting based on the existing air-conditioning proposed in background technology
Frost thickness on outer machine and the problem of select optimal defrosting mode, the invention provides a kind of control method of air-conditioner defrosting,
It is intended to allow air-conditioning to select optimal defrosting mould according to the frost thickness on outdoor environment temperature and air-conditioner outdoor unit
Formula, so as to ensure the comfortableness of indoor environment, improves the heating effect of air-conditioning.
Referring to Fig. 1 and Fig. 2, Fig. 1 is the flow chart of the defrosting control method of the air-conditioner of the present invention, and Fig. 2 is of the invention
The structural representation of air-conditioner.As shown in Fig. 2 above-mentioned air-conditioner includes air-conditioner outdoor unit 1, indoor apparatus of air conditioner 2, the and of compressor 4
Four-way valve 5, compressor 4, air-conditioner outdoor unit 1 and indoor apparatus of air conditioner 2, which are sequentially connected, to be formed closed loop (i.e. the refrigerating/heating of air-conditioning is followed
Loop back path), four-way valve 5 can make air-conditioner be in refrigeration or heating condition by way of commutation, and air-conditioner also includes：It is other
Logical loop, it is arranged between compressor 4 and air-conditioner outdoor unit 2, and by-passing valve 3 is provided with bypass circulation；Control unit, its energy
By-passing valve 3 is opened/is closed, and/or four-way valve 5 is commutated.As shown in figure 1, the defrosting control method bag of the present invention
Include following steps：S1：When air-conditioning meets defrosting condition, compare outdoor environment temperature and the first preset temperature；S2：If outdoor ring
Border temperature is more than or equal to the first preset temperature, then controls air-conditioning to perform bypass defrosting mode；S3：If outdoor environment temperature is less than
First preset temperature, then judge whether the frost thickness on air-conditioner outdoor unit 1 meets preparatory condition；S4：If on air-conditioner outdoor unit 1
Frost thickness meet preparatory condition, then control air-conditioning perform bypass defrosting mode (individually drawing loop)；S5：If outside air-conditioning room
Frost thickness on machine 1 is unsatisfactory for preparatory condition, then controls air-conditioning to perform refrigeration defrosting mode (reverse cycle defrosting).
By the setting of the first preset temperature, the conclusion for whether performing bypass defrosting mode can be tentatively provided.It is therein
First preset temperature neatly can be adjusted and set according to actual situation, as long as meeting by removing that the first preset temperature is determined
The separation of ice-lolly part can optimize defrosting control method.By the setting of the preparatory condition of frost thickness, one can be entered
Step, which is provided, to be performed bypass defrosting mode and still freezes the conclusion of defrosting mode.Similarly, the preparatory condition of frost thickness therein
Neatly it can also adjust and set according to actual situation, remove ice-lolly by what the preparatory condition of frost thickness was determined as long as meet
The separation of part can optimize defrosting control method.
In a kind of possible embodiment, the first preset temperature can be 0 DEG C, i.e., be more than or wait in outdoor environment temperature
When 0 DEG C, it is believed that now outdoor environment temperature is higher, air-conditioning directly selects bypass defrosting.And in outdoor environment temperature
During less than 0 DEG C, it is believed that now outdoor environment temperature is relatively low, it is necessary to determine whether the frost thickness on air-conditioner outdoor unit 1
Whether preparatory condition is met.Clearly as the change and the change of weather in season, the first above-mentioned preset temperature are not limited to 0
DEG C, it can be adjusted according to actual situation.
In a kind of possible embodiment, the determination mode of the preparatory condition of frost thickness can be：Judge outdoor ring
Whether the difference of the dew-point temperature of border air and outer coil pipe (outdoor unit coil pipe) temperature of outdoor unit, which is less than or equal to second, is preset
Temperature；If the dew-point temperature of ambient outdoor air and the difference of outdoor unit coil temperature are less than or equal to the second preset temperature,
Then think that frost thickness meets preparatory condition；If the dew-point temperature of ambient outdoor air and the difference of outdoor unit coil temperature are big
In the second preset temperature, then it is assumed that frost thickness is unsatisfactory for preparatory condition.By judging different temperature conditionss, it can select most
Excellent defrosting mode.By inventor's repetition test, observe and compare, in the case of using above-mentioned judgment mode, especially
When frost layer on outdoor unit coil pipe is relatively thin, it can be effectively prevented from frequentization occur by way of introducing the second preset temperature
The problem of frost or false defrost.And the frost layer on outdoor unit coil pipe it is thicker when, introduce the second preset temperature by way of can
Frost layer is removed totally with rapid by way of being defrosted kind of refrigeration cycle, also, bypass defrosting is first used again with existing air-conditioning
The defrosting scheme defrosted using kind of refrigeration cycle is compared, and the present invention is directly defrosted in the case where frost layer is thicker using kind of refrigeration cycle,
So that the time of defrosting is shorter, so that more power saving, beneficial to the saving energy.Certainly, the second preset temperature can be according to reality
Situation is neatly adjusted and set, and defrosting can be optimized as long as meeting the separation of the defrosting condition determined by the second preset temperature
Control method.Also, the preparatory condition of above-mentioned frost thickness is also not limited to above-mentioned judgment mode, such as except dew point temperature
Degree and outdoor unit coil temperature, may be replaced by or add the rate of decay by judging outdoor unit coil temperature and/or
The conditions such as the relative humidity of air carry out the judgement of frost thickness, or are directly observed by experience and judge air-conditioner outdoor unit
1 frost thickness, or judge by introducing image collecting device the frost thickness of air-conditioner outdoor unit 1, it is certain reaching
Defrosted in the case of thickness.
In a kind of possible embodiment, the second preset temperature can be 3 DEG C, the dew-point temperature of ambient outdoor air with
When the differential temperature of outdoor unit coil temperature is less than or equal to 3 DEG C, it can be determined that the frost layer now on air-conditioner outdoor unit 1 is relatively thin,
Should be using bypass defrosting mode.And may determine that when the differential temperature is more than 3 DEG C frost layer on now air-conditioner outdoor unit 1 compared with
Thickness, frost layer can not be thoroughly removed using bypass defrosting mode, should be using refrigeration defrosting mode.Similarly, due to change of seasons because
Other condition elements (such as circulating refrigerant amount in service life of air-conditioning, air-conditioning of element, the factor of Changes in weather or air-conditioning
Deng), the second above-mentioned preset temperature is not limited to 3 DEG C, can be adjusted according to actual situation.
As one kind preferably, before air-conditioning enters defrosting mode, above-mentioned defrosting control method can also be including judgement
It is not no the step of meet defrosting condition.Preferably, defrosting condition can be：Judge outdoor unit during air-conditioner is in heating condition
Whether coil temperature is less than the dew-point temperature of ambient outdoor air, and outdoor unit coil temperature is less than the dew of ambient outdoor air
Whether the duration of point temperature reaches the second preset time.If outdoor unit coil temperature is less than the dew point of ambient outdoor air
The temperature and duration reaches the second preset time, then air-conditioning meet defrosting condition, carry out foregoing S1-S5；If outdoor
Machine coil temperature is more than or equal to the dew-point temperature of ambient outdoor air, or outdoor unit coil temperature is less than ambient outdoor air
Dew-point temperature but the duration be not up to the second preset time, then air-conditioning is unsatisfactory for defrosting condition, without defrosting.Wherein,
Second preset time neatly can be adjusted and set according to actual situation, as long as meeting by removing that the second preset time is determined
The separation of ice-lolly part can optimize defrosting control method.In a kind of embodiment of the present invention, it can use
Tes=C*Tao- α calculates the dew-point temperature T of outside ambient aires, wherein, TaoFor outdoor environment temperature, C is coefficient, and α is
Constant, coefficient C and constant α can be obtained by any appropriate mode, such as experiment, mathematical modeling.
In a kind of possible embodiment, the second above-mentioned preset time can be 2min, that is, whether judge air-conditioning
When meeting defrosting condition, judge whether outdoor unit coil temperature reaches 2min less than the duration of dew-point temperature, it is certainly, above-mentioned
The second preset time be not limited to 2min, can be adjusted and set according to actual situation.Meanwhile, above-mentioned defrosting condition
Above-mentioned judgment mode is not limited to, in actual applications, other judgment modes can also be used, such as according to outdoor unit coil temperature
The speed of decay is judged or judged etc. according to the relative humidity of air, will not be repeated here.
Using the present invention air-conditioner defrosting control method when, air-conditioning start heating mode under run a period of time
Afterwards, control temperature sensor detection outdoor environment temperature and outdoor unit coil temperature, and obtain the dew point temperature of ambient outdoor air
Degree, then judge whether outdoor environment temperature is more than or equal to 0 DEG C.
If outdoor environment temperature is more than or equal to 0 DEG C, illustrate that now outdoor environment temperature is higher, air-conditioner is directly selected
Bypass defrosting, that is to say, that now enter bypass defrosting mode.In a kind of specific embodiment, correspond to
Fig. 2 structure, control air-conditioner opens by-passing valve 3.It is held essentially constant, can controls for temperature indoor during guarantee defrosting
The raising frequency of compressor 4 processed, after air-conditioner defrosting is continued for some time, continues or compartment of terrain control temperature sensor detection outdoor unit disk
Pipe temperature, judges whether outdoor unit coil temperature is more than or equal to the dew-point temperature of ambient outdoor air, and judge outer coil pipe temperature
Whether degree reaches the first preset time more than or equal to the duration of dew-point temperature；If outdoor unit coil temperature is more than or waited
The first preset time is reached in the dew-point temperature of ambient outdoor air and duration, then controls air-conditioner to exit bypass defrosting
Pattern, corresponding to Fig. 2 structure, should now control to close by-passing valve 3, and the control frequency reducing of compressor 4.If outdoor unit disk
Pipe temperature is less than the dew-point temperature of ambient outdoor air, or outdoor unit coil temperature is more than or equal to the dew of ambient outdoor air
Put temperature but the duration is not up to the first preset time, then air-conditioner proceeds to bypass defrosting mode.Above-mentioned first is pre-
If the time can be 1min, i.e., when judging frost thickness, judge that outdoor unit coil temperature is more than or equal to ambient outdoor air
Duration of dew-point temperature whether reach 1min, certainly, the first above-mentioned preset time is not limited to 1min, can be according to reality
The situation on border is adjusted and set, and is removed as long as the separation for meeting the defrosting condition determined by the first preset time can optimize
White control method.
If outdoor environment temperature is less than 0 DEG C, illustrate that now outdoor environment temperature is relatively low, it is necessary to determine whether air conditioning chamber
Whether the frost thickness on outer machine 1 is small by the dew-point temperature and the difference of outdoor unit coil temperature that judge ambient outdoor air
The frost thickness on air-conditioner outdoor unit 1 is judged in or equal to 3 DEG C.
If above-mentioned differential temperature is less than or equal to 3 DEG C, illustrate that the frost layer on air-conditioner outdoor unit 1 is relatively thin, pass through bypass
Defrosting mode can be defrosted, and now air-conditioner enters bypass defrosting mode, and control air-conditioning opens by-passing valve 3, to ensure to remove
Indoor temperature is held essentially constant during frost, controls the raising frequency of compressor 4.After air-conditioner defrosting is continued for some time, control
Temperature sensor detects outdoor unit coil temperature, judges whether outdoor unit coil temperature is more than or equal to the dew of ambient outdoor air
Point temperature, and outdoor unit coil temperature are more than or equal to whether duration of the dew-point temperature of ambient outdoor air reaches the
One preset time.If outdoor unit coil temperature is more than or equal to the dew-point temperature of ambient outdoor air and the duration reaches
First preset time, control air-conditioner exits bypass defrosting mode, corresponding to Fig. 2 structure, should control to close by-passing valve 3,
And the control frequency reducing of compressor 4.If outdoor unit coil temperature is less than the dew-point temperature of ambient outdoor air, or outdoor unit disk
Pipe temperature be more than or equal to ambient outdoor air dew-point temperature but the duration be not up to the first preset time, then air-conditioner after
It is continuous to carry out bypass defrosting mode.Similarly, the first above-mentioned preset time can be adjusted and set according to actual situation.
If above-mentioned difference is more than 3 DEG C, illustrate that the frost layer on air-conditioner outdoor unit 1 is thicker, by using bypass defrosting mould
Formula can not thoroughly remove frost layer, corresponding to Fig. 2 structure, should should now control air-conditioning to enter using refrigeration defrosting mode
Freeze defrosting mode, and the four-way valve 5 of control air-conditioning commutates (air-conditioning switches to refrigeration mode by heating mode), and closes by-passing valve
3, and control indoor apparatus of air conditioner 2 to shut down, so that refrigerant makes air-conditioner be defrosted using refrigeration mode in the way of inverse circulation.
During air conditioner refrigerating defrosts, continue or compartment of terrain control temperature sensor detection outdoor unit coil temperature, and judge outdoor ring
Whether the dew-point temperature of border air is less than or equal to 3 DEG C with the difference of outdoor unit coil temperature；If the dew of ambient outdoor air
Point temperature is less than or equal to 3 DEG C with the difference of outdoor unit coil temperature, and control air-conditioning exits refrigeration defrosting mode, corresponding to Fig. 2
Structure, four-way valve 5 should be controlled to commutate, and open by-passing valve 3 (air-conditioning by refrigeration defrosting mode switch to bypass defrosting mould
Formula), and control indoor apparatus of air conditioner 2 to open, air-conditioning carries out bypass defrosting mode.If the dew-point temperature of ambient outdoor air with
The difference of outdoor unit coil temperature is more than 3 DEG C, and control air-conditioner persistently carries out refrigeration defrosting mode.
In the defrosting control method of the present invention, no matter air-conditioner is directly entered bypass defrosting mode or air-conditioner by making
Cold defrosting mode switches to bypass defrosting mode, in order to ensure air-conditioner carry out bypass defrosting during indoor environment temperature not by
Influence is, it is necessary to control compressor 4 to carry out raising frequency operation.In a kind of embodiment of the present invention, formula f2 can be used
=K*f1+b calculates the frequency after the raising frequency of compressor 4, wherein, f1 is frequency-i.e. air-conditioner entrance before compressor 4 raising frequency
The frequency of compressor 4 before bypass defrosting mode, f2 is that frequency-i.e. air-conditioner after the raising frequency of compressor 4 is performing bypass defrosting
The frequency of compressor 4 during pattern, K is external environment temperature coefficient, and b is constant, and COEFFICIENT K and constant b can be by any appropriate
Mode obtain, such as experiment, mathematical modeling.
As can be seen that using the defrosting control method of the present invention, during air-conditioner performs bypass defrosting, air-conditioner can be with
All the time in not stopped status, so as to ensure that indoor environment temperature is held essentially constant, so as to protect when air-conditioning is bypassed and defrosted
The comfortableness of indoor environment has been demonstrate,proved, the heating effect of air-conditioning is improved, i.e., on the premise of Consumer's Experience is not sacrificed as far as possible, effectively
Ground realizes the defrosting to air-conditioner.And during air-conditioner performs refrigeration defrosting, Consumer's Experience is being sacrificed as few as possible
Under the premise of, promptly realize and thoroughly defrost.Evade due to the long caused air-conditioner of the not thorough or defrosting time that defrosts
Refrigeration performance deteriorate phenomenon, so as to ensure that the operational reliability of air-conditioner.
So far, combined preferred embodiment shown in the drawings describes technical scheme, still, this area
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these embodiments.Without departing from this
On the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to correlation technique feature, these
Technical scheme after changing or replacing it is fallen within protection scope of the present invention.
Claims (10)
1. a kind of defrosting control method of air-conditioner, it is characterised in that the defrosting control method comprises the following steps：
When air-conditioner meets defrosting condition, compare outdoor environment temperature and the first preset temperature；
If outdoor environment temperature is more than or equal to the first preset temperature, control air-conditioner performs bypass defrosting mode；
If outdoor environment temperature is less than the first preset temperature, judge whether frost thickness meets preparatory condition；
If frost thickness meets the preparatory condition, control air-conditioner performs bypass defrosting mode；
If frost thickness is unsatisfactory for the preparatory condition, control air-conditioner performs refrigeration defrosting mode.
2. defrosting control method according to claim 1, it is characterised in that the preparatory condition includes：
Judge whether the dew-point temperature of ambient outdoor air is less than or equal to the second default temperature with the difference of outdoor unit coil temperature
Degree；
If the dew-point temperature of ambient outdoor air and the difference of outdoor unit coil temperature are less than or equal to the second preset temperature,
Frost thickness meets the preparatory condition；
If the dew-point temperature of ambient outdoor air is more than the second preset temperature with the difference of outdoor unit coil temperature, frost layer is thick
Degree is unsatisfactory for the preparatory condition.
3. defrosting control method according to claim 2, it is characterised in that the defrosting control method also includes：
During air-conditioner performs bypass defrosting mode, judge whether outdoor unit coil temperature is more than or equal to ambient outdoor air
Dew-point temperature, and outdoor unit coil temperature is more than or equal to whether duration of dew-point temperature of ambient outdoor air reaches
To the first preset time；
If outdoor unit coil temperature is more than or equal to the dew-point temperature of ambient outdoor air and the duration reaches that first is pre-
If the time, then air-conditioner is controlled to exit bypass defrosting mode；
If outdoor unit coil temperature is less than the dew-point temperature of ambient outdoor air, or outdoor unit coil temperature is more than or equal to
The dew-point temperature of the ambient outdoor air but duration is not up to the first preset time, then control air-conditioner persistently to bypass defrosting mould
Formula.
4. defrosting control method according to claim 2, it is characterised in that the defrosting control method also includes：
During air-conditioner performs refrigeration defrosting mode, judge whether frost thickness meets the preparatory condition；
If frost thickness meets the preparatory condition, control air-conditioner switches to bypass defrosting mode；
If frost thickness is unsatisfactory for the preparatory condition, control air-conditioner persistently freezes defrosting mode.
5. defrosting control method according to any one of claim 1 to 4, it is characterised in that by controlling air-conditioner
By-passing valve unlatching/closing makes the into/out bypass defrosting mode of air-conditioner, and
The compressor raising frequency of air-conditioner is controlled when entering bypass defrosting mode；
The compressor frequency reducing of air-conditioner is controlled when exiting bypass defrosting mode.
6. defrosting control method according to any one of claim 1 to 4, it is characterised in that by controlling air-conditioner
The mode of four-way valve commutation so that the into/out refrigeration defrosting mode of air-conditioner, and
By-passing valve is closed when entering refrigeration defrosting mode and control indoor apparatus of air conditioner is shut down；
By-passing valve and control indoor apparatus of air conditioner start are opened when exiting refrigeration defrosting mode.
7. defrosting control method according to claim 1, it is characterised in that the defrosting condition of the air-conditioner includes：
During air-conditioning heating is circulated, outdoor unit coil temperature is less than the dew-point temperature of ambient outdoor air, and outdoor unit coil pipe
The duration that temperature is less than the dew-point temperature of ambient outdoor air reaches the second preset time.
8. defrosting control method according to any one of claim 1 to 4, it is characterised in that first preset temperature
For 0 DEG C.
9. the defrosting control method according to any one of claim 2 to 4, it is characterised in that second preset temperature
For 3 DEG C.
10. a kind of air-conditioner, the air-conditioner includes compressor, air-conditioner outdoor unit, indoor apparatus of air conditioner and four-way valve, the compression
Machine, the air-conditioner outdoor unit and the indoor apparatus of air conditioner are sequentially connected to form closed loop, and the four-way valve can be by the side of commutation
Formula makes the air-conditioner be in refrigeration or heating condition, it is characterised in that the air-conditioner also includes：
Bypass circulation, it is arranged between the compressor and the air-conditioner outdoor unit, and is provided with side on the bypass circulation
Port valve；
Control unit, its can be made using the defrosting control method any one of claim 1 to 9 by-passing valve open/
Close and/or the four-way valve is commutated.
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Effective date of registration: 20200914 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Co-patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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Effective date of registration: 20201102 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee before: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. |