CN106958926A - Air-conditioner and its defrosting control method - Google Patents

Air-conditioner and its defrosting control method Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
air
conditioner
temperature
defrosting
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710327167.2A
Other languages
Chinese (zh)
Other versions
CN106958926B (en
Inventor
罗荣邦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Zhijia Co Ltd
Qingdao Haier Jiaozhou Air Conditioner Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN201710327167.2A priority Critical patent/CN106958926B/en
Publication of CN106958926A publication Critical patent/CN106958926A/en
Application granted granted Critical
Publication of CN106958926B publication Critical patent/CN106958926B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/42Defrosting; Preventing freezing of outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air

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

Air-conditioner and its defrosting control method
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.
CN201710327167.2A 2017-05-10 2017-05-10 Air conditioner and defrosting control method thereof Active CN106958926B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710327167.2A CN106958926B (en) 2017-05-10 2017-05-10 Air conditioner and defrosting control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710327167.2A CN106958926B (en) 2017-05-10 2017-05-10 Air conditioner and defrosting control method thereof

Publications (2)

Publication Number Publication Date
CN106958926A true CN106958926A (en) 2017-07-18
CN106958926B CN106958926B (en) 2020-05-29

Family

ID=59482804

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710327167.2A Active CN106958926B (en) 2017-05-10 2017-05-10 Air conditioner and defrosting control method thereof

Country Status (1)

Country Link
CN (1) CN106958926B (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107388499A (en) * 2017-07-31 2017-11-24 苏州大成有方数据科技有限公司 A kind of domestic air conditioning defrosting control method
CN107842970A (en) * 2017-10-18 2018-03-27 广东美的暖通设备有限公司 Air-conditioning system and its defrosting control method and device
CN108386980A (en) * 2018-03-05 2018-08-10 奥克斯空调股份有限公司 A kind of air-conditioning defrosting control method and device
CN109237727A (en) * 2018-08-28 2019-01-18 青岛海尔空调电子有限公司 defrosting control method for air conditioner
CN109269016A (en) * 2018-08-02 2019-01-25 珠海格力电器股份有限公司 A kind of defrosting control method, device and heat pump unit
CN110195912A (en) * 2019-05-31 2019-09-03 宁波奥克斯电气股份有限公司 Air-conditioner defrosting control method, control device and air-conditioning
CN110410968A (en) * 2019-07-04 2019-11-05 青岛海尔空调器有限总公司 Air conditioner and its control method
WO2020010723A1 (en) * 2018-07-10 2020-01-16 青岛海尔空调电子有限公司 Air conditioner and defrost control method therefor
WO2020019849A1 (en) * 2018-07-23 2020-01-30 青岛海尔空调电子有限公司 Air conditioner and outdoor unit defrosting control method thereof
CN110836459A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836468A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836438A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836437A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836455A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836441A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836458A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836460A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836442A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110966797A (en) * 2019-12-10 2020-04-07 珠海格力电器股份有限公司 Vehicle heat pump air conditioning system and control method thereof
CN112050376A (en) * 2019-06-07 2020-12-08 青岛海尔空调器有限总公司 Control method and control device for defrosting of air conditioner and air conditioner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03221766A (en) * 1990-01-26 1991-09-30 Daikin Ind Ltd Defrost controller
CN103574832A (en) * 2012-07-25 2014-02-12 珠海格力电器股份有限公司 Control method, device and system for defrosting of air conditioner
CN103889748A (en) * 2011-11-02 2014-06-25 株式会社电装 Control device for air conditioning device
CN104132404A (en) * 2014-07-31 2014-11-05 青岛海尔空调器有限总公司 Air-conditioner defrosting method
CN204718184U (en) * 2015-05-09 2015-10-21 河北纳森空调有限公司 Automatic defrosting type air energy thermal pump assembly
CN106016581A (en) * 2016-05-11 2016-10-12 广东美的制冷设备有限公司 Defrosting control method and device of air conditioner
CN106871338A (en) * 2017-01-19 2017-06-20 青岛海尔空调器有限总公司 A kind of air-conditioner defrosting control method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03221766A (en) * 1990-01-26 1991-09-30 Daikin Ind Ltd Defrost controller
CN103889748A (en) * 2011-11-02 2014-06-25 株式会社电装 Control device for air conditioning device
CN103574832A (en) * 2012-07-25 2014-02-12 珠海格力电器股份有限公司 Control method, device and system for defrosting of air conditioner
CN104132404A (en) * 2014-07-31 2014-11-05 青岛海尔空调器有限总公司 Air-conditioner defrosting method
CN204718184U (en) * 2015-05-09 2015-10-21 河北纳森空调有限公司 Automatic defrosting type air energy thermal pump assembly
CN106016581A (en) * 2016-05-11 2016-10-12 广东美的制冷设备有限公司 Defrosting control method and device of air conditioner
CN106871338A (en) * 2017-01-19 2017-06-20 青岛海尔空调器有限总公司 A kind of air-conditioner defrosting control method

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107388499A (en) * 2017-07-31 2017-11-24 苏州大成有方数据科技有限公司 A kind of domestic air conditioning defrosting control method
CN107842970B (en) * 2017-10-18 2019-10-01 广东美的暖通设备有限公司 Air-conditioning system and its defrosting control method and device
CN107842970A (en) * 2017-10-18 2018-03-27 广东美的暖通设备有限公司 Air-conditioning system and its defrosting control method and device
CN108386980A (en) * 2018-03-05 2018-08-10 奥克斯空调股份有限公司 A kind of air-conditioning defrosting control method and device
CN108386980B (en) * 2018-03-05 2020-06-02 奥克斯空调股份有限公司 Air conditioner defrosting control method and device
WO2020010723A1 (en) * 2018-07-10 2020-01-16 青岛海尔空调电子有限公司 Air conditioner and defrost control method therefor
WO2020019849A1 (en) * 2018-07-23 2020-01-30 青岛海尔空调电子有限公司 Air conditioner and outdoor unit defrosting control method thereof
CN109269016B (en) * 2018-08-02 2020-09-04 珠海格力电器股份有限公司 Defrosting control method and device and heat pump unit
CN109269016A (en) * 2018-08-02 2019-01-25 珠海格力电器股份有限公司 A kind of defrosting control method, device and heat pump unit
CN110836460A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836459A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836442A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836438A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836437A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836455A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836441A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836458A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN110836468A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN109237727A (en) * 2018-08-28 2019-01-18 青岛海尔空调电子有限公司 defrosting control method for air conditioner
CN110195912A (en) * 2019-05-31 2019-09-03 宁波奥克斯电气股份有限公司 Air-conditioner defrosting control method, control device and air-conditioning
CN112050376A (en) * 2019-06-07 2020-12-08 青岛海尔空调器有限总公司 Control method and control device for defrosting of air conditioner and air conditioner
CN110410968A (en) * 2019-07-04 2019-11-05 青岛海尔空调器有限总公司 Air conditioner and its control method
CN110966797A (en) * 2019-12-10 2020-04-07 珠海格力电器股份有限公司 Vehicle heat pump air conditioning system and control method thereof

Also Published As

Publication number Publication date
CN106958926B (en) 2020-05-29

Similar Documents

Publication Publication Date Title
CN106556106B (en) Control method and device for self-cleaning of indoor unit of air conditioner
CN110736186B (en) Self-cleaning control method and device for air conditioner
CN107166639B (en) Air conditioner defrosting control method and control device and air conditioner
CN109489189B (en) Cleaning method of air conditioner
CN105972772B (en) The defrosting control method and device of air conditioner
CN106594958B (en) A kind of condensation prevention control method of air-conditioning, device and air-conditioning
CN103363614B (en) Wind cooling cold and hot water air-conditioner set and defrosting control method thereof and device
CN106403192B (en) A kind of anti-condensation progress control method, device and multi-gang air conditioner
KR100867469B1 (en) Multi-range indoor air-conditioning heating system and ventilation control system and the energy-efficient control method of the same
CN104848738B (en) The clean method and device of air-conditioning indoor heat exchanger
CN104764171B (en) Air conditioner and its control method and device
CN102159901B (en) Air conditioning device
CN106016616B (en) Air-conditioning condensation prevention control method and air conditioner
CN107131611B (en) Defrosting control method for air conditioner
JP3888403B2 (en) Method and apparatus for controlling air conditioner
CN104019531B (en) The Defrost method of air-conditioner and air-conditioner
CN109469965B (en) Cleaning method of air conditioner
CN107642846A (en) Electrochemistry air-conditioning system and its control method
CN101551183B (en) Defrosting control method of air-conditioner
CN105066537B (en) Multi-connected machine heats method for controlling oil return
JP5634682B2 (en) Air conditioner
CN105588267B (en) A kind of defrosting control method and device that heat pump system frosting degree detects automatically
CN107514683A (en) Air conditioner and its indoor set automatically cleaning control method
KR950007285B1 (en) Air conditioner with defrosting control apparatus
CN106288217A (en) The heat exchanger cleaning control method of air-conditioner and device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

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.

TR01 Transfer of patent right
TR01 Transfer of patent right

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.

TR01 Transfer of patent right