CN110017583A - Air conditioner and its defrosting control method - Google Patents
Air conditioner and its defrosting control method Download PDFInfo
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- CN110017583A CN110017583A CN201910185581.3A CN201910185581A CN110017583A CN 110017583 A CN110017583 A CN 110017583A CN 201910185581 A CN201910185581 A CN 201910185581A CN 110017583 A CN110017583 A CN 110017583A
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- temperature
- air conditioner
- attenuation rate
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- interior machine
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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
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to air conditioner technical fields, and in particular to a kind of air conditioner and its defrosting control method.The present invention provides a kind of air conditioner and its defrosting control methods, the air conditioner includes outdoor unit and indoor unit, the outdoor unit includes outer machine coil pipe, which comprises in the case of air conditioner is in heating condition, obtains the environment temperature of the outdoor unit of the air conditioner position；Obtain outer machine coil temperature and interior machine leaving air temp；According to the environment temperature, the outer machine coil temperature and the interior machine leaving air temp, the air conditioner is selectively made to enter defrosting mode.Defrosting control method of the invention is by carrying out comprehensive descision to environment temperature, interior machine leaving air temp and outer machine coil temperature, so as to accurately determine that air conditioner enters the opportunity of defrosting mode.
Description
Technical field
The present invention relates to air conditioner technical fields, and in particular to a kind of air conditioner and its defrosting control method.
Background technique
Air-conditioning system has been widely used in large buildings place, for example, hospital, large-scale market, office building, in hotel.
In the case of air conditioner is in heating condition, the surface temperature of the outer machine coil pipe of air conditioner is lower than environment temperature, when being lower than
Outer machine coil surface will will appear frost when zero degree.Outer machine coil pipe frosting will lead to the overall performance decline of air conditioner, from
And the heating effect of air conditioner is influenced, the comfort of indoor environment is reduced, and then influence user experience.Therefore, at air conditioner
In the case of heating condition, needs to carry out the outer machine coil pipe of air conditioner in time and effective defrosting operates.
Existing air conditioner is easy to determine due to defrosting opportunity there are error and in air-conditioning system when carrying out defrosting control
Occurs the phenomenon that false defrosting or defrosting lag in the case of non-frosting or frosting are less.Vacation defrosting or defrosting lag are not only
It will cause the decline of user experience, and influence the service life of compressor.In consideration of it, selection suitable defrosting opportunity is aobvious
It obtains most important.
Therefore, this field needs a kind of new air conditioner defrosting control method to solve the above problems.
Summary of the invention
In order to solve the above problem in the prior art, i.e., existing air conditioner can not accurately judge to execute defrosting mode
Opportunity and causing there is the problem of false defrosting, the present invention provides a kind of defrosting control method of air conditioner, the air conditioner
Including indoor unit and outdoor unit, the outdoor unit includes outer machine coil pipe, which comprises is in heating condition in air conditioner
Under situation, the environment temperature of the outdoor unit position is obtained；Obtain outer machine coil temperature and interior machine leaving air temp；According to institute
Environment temperature, the outer machine coil temperature and the interior machine leaving air temp are stated, the air conditioner is selectively made to enter defrosting
Mode.
In the optimal technical scheme of above-mentioned defrosting control method, " according to the environment temperature, the outer machine coil temperature
And the interior machine leaving air temp, so that the air conditioner is entered defrosting mode " it specifically includes:
According to the interior machine leaving air temp, the attenuation rate of the interior machine leaving air temp is calculated；According to the environment temperature, institute
The attenuation rate for stating outer machine coil temperature and the interior machine leaving air temp, selectively makes the air conditioner enter defrosting mode.
In the optimal technical scheme of above-mentioned defrosting control method, " according to the environment temperature, the outer machine coil temperature
And the attenuation rate of the interior machine leaving air temp, so that the air conditioner is entered defrosting mode " it specifically includes:
Judge whether the air conditioner meets following condition:
Condition 11: the environment temperature is less than or equal to the first preset temperature；
Condition 12: the outer machine coil temperature continues to be less than or equal to the second preset temperature in the first preset time；
Condition 13: the attenuation rate of the interior machine leaving air temp is more than or equal to default attenuation rate；
In the case of the air conditioner meets above-mentioned 3 conditions simultaneously, the air conditioner is made to enter defrosting mode；Its
In, second preset temperature and/or the default attenuation rate are determined by the environment temperature.
In the optimal technical scheme of above-mentioned defrosting control method, when the increase of indoor unit load or oil return of the air conditioner
When operating, " according to the environment temperature, the outer machine coil temperature and the interior machine leaving air temp, selectively make described
Air conditioner enters defrosting mode " it specifically includes: judge whether the air conditioner meets following condition:
Condition 21: the environment temperature of the position where the outdoor unit is less than or equal to the first preset temperature；
Condition 22: the outer machine coil temperature continues to be less than or equal to the second preset temperature in the first preset time；
In the case of the air conditioner meets above-mentioned 2 conditions simultaneously, the air conditioner is made to enter defrosting mode；Its
In, second preset temperature is determined by the environment temperature.
In the optimal technical scheme of above-mentioned defrosting control method, second preset temperature includes multiple temperature thresholds,
The environment temperature in each temperature threshold and preset temperature section has preset first mapping relations；And/or
The default attenuation rate includes multiple attenuation rate threshold values, the environment temperature of each attenuation rate threshold value and preset temperature section
Degree has preset second mapping relations.
In the optimal technical scheme of above-mentioned defrosting control method, the preset temperature section include the first temperature range and
Second temperature section, the minimum value of first temperature range are greater than the maximum value in the second temperature section, and described second is pre-
It is first temperature threshold and first temperature range, described if temperature includes the first temperature threshold and second temperature threshold value
Second temperature threshold value and the second temperature section are respectively provided with preset first mapping relations；
The default attenuation rate include the first attenuation rate threshold value and the second attenuation rate threshold value, the first attenuation rate threshold value with
First temperature range, the second attenuation rate threshold value and the second temperature section are respectively provided with preset second mapping and close
System；Wherein, first temperature threshold is more than or equal to the second temperature threshold value, and the first attenuation rate threshold value is more than or equal to institute
State the second attenuation rate threshold value.
In the optimal technical scheme of above-mentioned defrosting control method, " according to the interior machine leaving air temp, the interior machine is calculated
The attenuation rate of leaving air temp " specifically includes:
When the outer machine coil temperature is equal to the second preset temperature, obtains interior machine leaving air temp and be used as machine outlet air in initial
Temperature；
Obtain machine leaving air temp in primary current every the second preset time, and according to it is described it is current in machine leaving air temp and
The initial interior machine leaving air temp calculates the attenuation rate of the interior machine leaving air temp.
In the optimal technical scheme of above-mentioned defrosting control method, the method also includes:
Obtain the operation duration that the air conditioner is continuously in heating mode；When according to the environment temperature, the operation
Long, the described outer machine coil temperature and the interior machine leaving air temp, selectively make the air conditioner enter defrosting mode.
In the optimal technical scheme of above-mentioned defrosting control method, " according to the environment temperature, the operation duration, institute
Outer machine coil temperature and the interior machine leaving air temp are stated, the air conditioner is selectively made to enter defrosting mode " it specifically includes:
The attenuation rate of the interior machine leaving air temp is calculated according to the interior machine leaving air temp；
Judge whether the air conditioner meets following condition:
Condition 31: the operation duration is more than or equal to third preset time；
Condition 32: the environment temperature is less than or equal to the first preset temperature；
Condition 33: the outer machine coil temperature continues to be less than or equal to the second preset temperature in the first preset time；
Condition 34: the attenuation rate of the interior machine leaving air temp is more than or equal to default attenuation rate；
In the case of the air conditioner meets above-mentioned 4 conditions simultaneously, the air conditioner is made to enter defrosting mode；Its
In, second preset temperature and/or the default attenuation rate are determined by the environment temperature.
Environment temperature of the defrosting control method of the invention according to outdoor unit of the air conditioner position, outer machine coil temperature
Judge whether air conditioner needs to defrost with interior machine leaving air temp, so that air conditioner can be timely and defrosting is effectively performed.
Specifically, by the prolonged of inventor the study found that outer machine coil temperature and interior machine leaving air temp can be accurately
React the frosting situation of outdoor unit, wherein interior machine leaving air temp can intuitively reflect the heating capacity of air conditioner, according to air-conditioning
The heating capacity of device can feed back the operation conditions of air-conditioning, to reliably deduce the frosting situation of air-conditioner outdoor unit.Pass through
Outer machine coil temperature and interior machine leaving air temp are included in defrosting decision condition simultaneously, the accurate of judgement can be further improved
Property.Also, in view of influence of the environment temperature to air conditioner frosting locating for air-conditioner outdoor unit, i.e. the environment locating for the outdoor unit
When temperature difference, outer machine coil temperature and the corresponding outdoor unit frosting degree of interior machine leaving air temp are also different, therefore, environment are being added
In the case that temperature is as decision condition, sky can more precisely be determined according to outer machine coil temperature and interior machine leaving air temp
The frosting degree of tune device is effectively prevented to more accurately determine defrosting opportunity and false defrosting occurs or the lag that defrosts
Phenomenon.
The present invention also provides a kind of air conditioner, the air-conditioner device is configured with controller, and the controller is for holding
The above-mentioned defrosting control method of row.It should be noted that the air conditioner has all technical effects of defrosting control method above-mentioned,
Details are not described herein.
Detailed description of the invention
Air conditioner and air conditioner defrosting control method of the invention described with reference to the accompanying drawings.In attached drawing:
Fig. 1 is a kind of flow diagram one of the defrosting control method of embodiment of the invention；
Fig. 2 is a kind of flow diagram two of the defrosting control method of embodiment of the invention；
Fig. 3 is a kind of flow diagram three of the defrosting control method of embodiment of the invention.
Specific 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 technical principle of the invention, it is not intended that limit the scope of the invention.For example, although
Describe each step of method of the invention in the application according to particular order, but these be not sequentially it is restrictive,
Under the premise of without departing from basic principle of the invention, those skilled in the art can execute the step in a different order
Suddenly.
Air conditioner of the invention mainly includes air-conditioner outdoor unit and air conditioner indoor unit, and air-conditioner outdoor unit is equipped with frequency-changeable compressor
And outdoor heat exchanger.Air conditioner indoor unit includes indoor heat exchanger and inner blower, under the drive of inner blower, air-flow through air inlet into
Enter indoor unit and is blown out after indoor heat exchanger heats through air outlet.
Referring to Fig. 1, Fig. 1 is a kind of flow diagram one of the defrosting control method of embodiment of the invention.Such as Fig. 1
Shown, defrosting control method of the invention includes the following steps:
Step S1: in the case of air conditioner is in heating condition, the environment of outdoor unit of the air conditioner position is obtained
Temperature；
Step S2: outer machine coil temperature and interior machine leaving air temp are obtained；
Step S3: according to environment temperature, outer machine coil temperature and interior machine leaving air temp, selectively enter air conditioner
Defrosting mode.
In step sl, the environment temperature of outdoor unit of the air conditioner position, outer machine coil temperature, interior machine leaving air temp
Obtaining means can there are many, such as environment temperature, outdoor temperature sensor can be provided on air-conditioner outdoor unit
To detect the environment temperature of air-conditioner outdoor unit present position；For interior machine leaving air temp, can indoors machine close to inner blower
Position be provided with leaving air temp sensor to obtain interior machine leaving air temp.And for outer machine coil temperature, it can use air-conditioning
Device original outer machine coil temperature sensor obtains outer machine coil temperature.
It is understood that the detection ordering of above-mentioned environment temperature, outer machine coil temperature, interior machine leaving air temp is regardless of elder generation
Afterwards, and detection means is also not limited to above-mentioned example, can also be obtained by other any means, these are without departure from this
The protection scope of invention.
As can be seen that the present invention is based on environment temperatures, outdoor is determined according to outer machine coil temperature and interior machine leaving air temp
The frosting situation of machine coil pipe, to realize the accurate judgement to the opportunity of defrosting mode.Specifically, with being tied on outdoor unit coil pipe
Frost is more and more, and the exchange capability of heat between outside ambient air and outdoor unit coil pipe can be substantially reduced, the system in outdoor unit coil pipe
Cryogen cannot be absorbed into enough heats and evaporate, and the pressure of inspiration(Pi) that this aspect will lead to compressor reduces, and make gaseous refrigerant
The evaporating temperature of agent further decreases, and pressure at expulsion increases, refrigerant flow decline, under the performance for eventually leading to entire air conditioner
Drop, outer machine coil temperature and interior machine leaving air temp can decline at this time, therefore, while according to outer machine coil temperature and interior machine outlet air
Temperature can more accurately judge the frosting degree of outdoor unit coil pipe.Also, in view of environment temperature is to the shadow of air conditioner frosting
It rings, i.e., when the environment temperature difference of outdoor unit position, outer machine coil temperature and the corresponding outdoor unit of interior machine leaving air temp
Frosting degree it is also different, therefore, environment temperature, outer machine coil temperature, interior machine leaving air temp are included in Rule of judgment, energy simultaneously
Enough frosting degrees for more accurately judging outdoor unit, to more accurately determine defrosting opportunity.
With continued reference to Fig. 2, Fig. 2 is a kind of flow diagram two of the defrosting control method of embodiment of the invention.Such as Fig. 2
Shown, in a kind of possible embodiment, control method includes:
Step S10: in the case of air-conditioning is in heating condition, the environment temperature of outdoor unit of the air conditioner position is obtained
Degree；
Step S20: outer machine coil temperature and interior machine leaving air temp are obtained, and interior machine outlet air is calculated according to interior machine leaving air temp
The attenuation rate of temperature；
Step S30: judge air conditioner whether and meanwhile meet condition 11, condition 12 and condition 13；
Condition 11: the environment temperature of the position where outdoor unit is less than or equal to the first preset temperature；
Condition 12: outer machine coil temperature continues to be less than or equal to the second preset temperature in the first preset time；
Condition 13: the attenuation rate of interior machine leaving air temp is more than or equal to default attenuation rate；
If so, thening follow the steps S40, air conditioner is made to enter defrosting mode；
If it is not, then return step S10.
In above-mentioned steps S20, the attenuation rate calculating process of interior machine leaving air temp is as follows: when outer machine coil temperature is equal to the
When two preset temperatures, machine leaving air temp in initial is obtained, then just obtains once machine outlet air in current every the second preset time
Temperature, and according to the attenuation rate of machine leaving air temp in current interior machine leaving air temp and the calculating of initial coil temperature.Such as one kind
Example, when air conditioner starts heating mode, since air conditioner just starts, outer machine coil temperature can be higher than the second preset temperature, but
After running a period of time with air conditioner heat-production, outer machine coil temperature can be gradually reduced, and detect that outer machine coil temperature is equal to
When the second preset temperature, the current interior machine leaving air temp that will test is as initial interior machine leaving air temp Ta.After five minutes, again
The primary current interior machine leaving air temp T of detectiona+5, then calculate the attenuation rate ε of interior machine leaving air temp at this time1=(Ta-Ta+5)/Ta,
And by ε1As the attenuation rate of current interior machine leaving air temp, and judge whether the attenuation rate of machine leaving air temp in current is less than or equal to
It presets attenuation rate and whether other conditions meets.If air conditioner cannot meet all preset conditions simultaneously at this time, then every 5 minutes
Obtain primary current interior machine leaving air temp Ta+10, then calculate the attenuation rate ε of interior machine leaving air temp at this time2=(Ta-Ta+10)/
Ta, and by ε2As the attenuation rate of current coil temperature, then judge whether the attenuation rate of current coil temperature is less than or equal to preset
Attenuation rate and whether other conditions meet.If air conditioner cannot meet above-mentioned condition simultaneously at this time, continuation is every to be calculated after five minutes
Coil temperature attenuation rate, until air conditioner meets above-mentioned condition simultaneously, thereby executing defrosting mode.
It is understood that the second preset time is not limited only to 5 minutes in above-mentioned example, it can also be other values,
Such as the second preset time can be the arbitrary value in 1-10 minutes ranges, and the second preset time is shorter, what controller calculated
The attenuation rate of interior machine leaving air temp will be more accurate.The present invention calculates the attenuation rate of interior machine leaving air temp according to leaving air temp,
And intuitively reflect the attenuation degree of the heating capacity of air-conditioning using the attenuation rate of leaving air temp, thus according to heating capacity
Attenuation degree accurately knows the frosting degree of air conditioner, and then effectively judges the opportunity into defrosting mode.
Although above-mentioned example is the attenuation rate of machine leaving air temp in calculating using the interior machine leaving air temp obtained, pass through decaying
Rate determines defrosting opportunity as one of determinant factor, however, it will be understood that interior machine can also can be characterized by other
The amount of the attenuation trend of leaving air temp determines defrosting opportunity, can such as pass through the decaying of interior machine leaving air temp within a preset time
Value (difference), attenuation ratio determine defrosting opportunity, or directly using interior machine leaving air temp as determinant factor.Art technology
Personnel can flexible choice characterization parameter according to the actual situation, as long as its attenuation trend that can characterize interior machine leaving air temp.
In above-mentioned steps S30, the first preset time is the value that system has been set in advance, can be in 5-10 minutes ranges
Arbitrary value.The first preset time can such as be set to 5 minutes, 6 minutes, 8 minutes, those skilled in the art can basis
The first suitable preset time of practical application scene selection.
Preferably, the first preset temperature in step S30 is the average temperature according to the heating season of air conditioner location
Degree determines.Since China is with a vast territory, the weather conditions of different regions are rather different, especially winter, due to cold wave activity, south
The northern temperature difference is very big, if outdoor mean temperature is not less than zero degree in winter for some southern areas, and some northern areas room in winter
Outer mean temperature is subzero tens degree.In consideration of it, the present invention is true according to the mean temperature of the heating season of air conditioner location
Fixed first preset temperature is the environment temperature of different regions so that the environment temperature of the air conditioner to different regions distinguishes
Provide suitable temperature threshold, to improve the judgment accuracy to defrosting opportunity, be effectively prevented from the false defrosting of appearance or
Defrost halfway problem in the presence of a harsh environment, also improves air conditioner working efficiency and performance.Such as it is used as one kind is possible to show
Example, determines average temperature range according to the mean temperature of the different regions counted on, is then divided into average temperature range more
A temperature range, corresponding first preset temperature value of each temperature range.Based on this, the first preset temperature process is determined such as
Under: first obtain the mean temperature of the heating season in area locating for air conditioner, the temperature range then fallen into according to mean temperature
The value of the first preset temperature is determined with the corresponding relationship of the first preset temperature.
The second preset temperature and default attenuation rate in step S30 can flexible setting according to the actual situation, can be
Fixed numerical value, also may include multiple values and each value is corresponding with different situations respectively.Preferably, the first preset temperature and pre-
If attenuation rate is determined by environment temperature, it is such as directed to the second preset temperature, is divided on the basis of being less than or equal to the first preset temperature
There are multiple temperature ranges, the second preset temperature and temperature range are previously provided with the first mapping relations, i.e. the second preset temperature includes
Multiple temperature thresholds, each temperature range correspond to a temperature threshold.And for default attenuation rate, it is pre- being less than or equal to first
If dividing on the basis of temperature has multiple temperature ranges, default attenuation rate and temperature range are previously provided with the second mapping relations, i.e.,
Default attenuation rate includes multiple attenuation rate threshold values, and each temperature range corresponds to an attenuation rate threshold value.
It is understood that the quantity of temperature range can flexibly be set according to actual needs, and default attenuation rate and
The corresponding temperature range of second preset temperature can be identical or different.It is such as directed to the second preset temperature, there are five temperature for division in advance
Section is spent, each temperature range corresponds to a temperature threshold；And for default attenuation rate, it is divided into four sections in advance, often
A section corresponds to an attenuation rate threshold value.Those skilled in the art can be according to the actual situation flexibly to default attenuation rate,
The mapping relations of two preset temperatures and environment temperature are set to meet specific application demand.
It is such as used as a kind of possible example, the first preset temperature is T1, environment temperature TaoIt is being less than T1On the basis of divide
For two temperature ranges, respectively T2≤Tao≤T1And Tao< T2, and it is two temperature ranges and the second preset temperature, default
The corresponding relationship of attenuation rate is as follows:
In T2≤Tao≤T1In the case where, the second preset temperature is Twp1, presetting attenuation rate is ε1；
In Tao< T2In the case where, the second preset temperature is Twp2, presetting attenuation rate is ε2；
Wherein, Twp1≥Twp2, and ε1≥ε2。
As can be seen that in view of under different environment temperatures, outer machine coil temperature is different from, and interior machine outlet air
The attenuation rate of temperature also will receive a degree of influence of environment temperature, therefore control method of the invention passes through different
The second different preset temperatures and default attenuation rate are set under environment temperature, to further increase the timeliness of air conditioner defrosting
And validity.
In view of when interior machine load increases or oil return operates, interior machine leaving air temp will appear biggish decaying, if at this time
It is that the attenuation rate of interior machine leaving air temp is included in judgment basis, it is easy to decision error occur, even if not having so as to cause outer machine
In the case of when frosting or less frosting, air conditioner still carries out defrosting mode.Given this, it is preferable that defrosting control of the invention
Method further include: when indoor unit load increases or oil return operates, without being removed the attenuation rate of interior machine leaving air temp as execution
The judgment basis of white mode.That is, only need to judge at this time outer machine coil temperature and environment temperature whether and meanwhile meet default
Condition, to selectively air conditioner be made to enter defrosting mode.This set can be to avoid in the increase of interior machine load or oil return fortune
There is the problem of false defrosting or defrosting lag in decision error when turning and causing, further increases the accuracy of defrosting opportunity judgement.
It is a kind of flow diagram three of the defrosting control method of embodiment of the invention referring to Fig. 3, Fig. 3.Such as Fig. 3 institute
Show, in a preferred embodiment, when air conditioner is also continuously in the operation of heating mode by control method of the invention
Length is included in defrosting mode judgment basis, thus according to environment temperature, operation duration, outer machine coil temperature, interior machine leaving air temp
Attenuation rate, selectively make air conditioner execute defrosting mode.The operation duration is it is understood that air conditioner defrosts away from the last time
Terminate or heat the operation duration of starting.
Specifically, obtain operation duration, outer machine coil temperature, the attenuation rate of interior machine leaving air temp and environment temperature it
Afterwards, judge air conditioner whether and meanwhile meet following condition:
Condition 31: operation duration is more than or equal to third preset time；
Condition 32: the environment temperature T of the position where outdoor unitaoLess than or equal to the first preset temperature T1；
Condition 33: outer machine coil temperature continues in the first preset time t1Inside it is less than or equal to the second preset temperature；
Condition 34: the attenuation rate of interior machine leaving air temp is more than or equal to default attenuation rate.
If air conditioner meets above-mentioned 4 conditions simultaneously, air conditioner is made to enter defrosting mode；If above-mentioned 4 cannot be met simultaneously
A condition, then make air conditioner not enter defrosting mode.
By the way that operation duration to be included in defrosting mode judgment basis, so that air conditioner is at least greater than in distance heating starting
After third preset time, or it is more than or equal to after third preset time to execute to defrost apart from last time defrosting and operates,
User experience is caused to reduce so as to avoid air conditioner from frequently defrosting, moreover it is possible to avoid the wave for frequently defrosting and causing the energy
Take.
Preferably, third preset time is according to the temperature on average and medial humidity of the heating season of different regions come really
It is fixed, to provide suitable temperature threshold for the third preset time of different regions, to improve the judgement to defrosting opportunity
Accuracy efficiently avoids false the phenomenon that defrosting or the halfway problem that defrosts in the presence of a harsh environment, and then improves sky
Adjust device working efficiency and performance
It is such as used as a kind of possible example, defrosting control method of the invention includes:
Step S100: in the case of air-conditioning is in heating condition, the environment temperature of outdoor unit of the air conditioner position is obtained
Degree；
Step S200: the operation duration that air conditioner is continuously in heating mode is obtained；
Step S300: outer machine coil temperature and interior machine leaving air temp are obtained, and interior machine is calculated according to interior machine leaving air temp and is gone out
The attenuation rate of air temperature；
Step S400: judge air conditioner whether and meanwhile meet following 4 conditions:
Condition 1: operation duration is more than or equal to third preset time；
Condition 2: environment temperature TaoLess than or equal to the first preset temperature T1；
Condition 3: outer machine coil temperature is in 5 minutes continuously less than equal to the second preset temperature；Also, interior machine leaving air temp
Attenuation rate be more than or equal to default attenuation rate.
Wherein, due to the second preset temperature and default attenuation rate and environment temperature TaoBetween have preset mapping relations,
Therefore, condition 3 can be divided into following condition 3.1, condition 3.2, condition 3.3 and condition 3.4 these four situations:
Condition 3.1: in T2≤Tao≤T1In the case where, outer machine coil temperature is in 5 minutes continuously less than equal to Twp1, interior
Attenuation rate >=10% of machine leaving air temp；
Condition 3.2: in T3≤Tao< T2In the case where, outer machine coil temperature is in 5 minutes continuously less than equal to Twp2, interior
Attenuation rate >=4% of machine leaving air temp；
Condition 3.3: in T4≤Tao< T3In the case where, outer machine coil temperature is in 5 minutes continuously less than equal to Twp3, interior
Attenuation rate >=4% of machine leaving air temp；
Condition 3.4: in Tao< T4In the case where, outer machine coil temperature is in 5 minutes continuously less than equal to Twp4, interior machine goes out
Attenuation rate >=4% of air temperature；
Wherein, Twp1≥Twp2≥Twp3≥Twp4。
As long as the attenuation rate of outer machine coil temperature and interior machine leaving air temp meets any in above-mentioned condition 3.1-3.4 simultaneously
, i.e., it is believed that it meets condition 3.
If so, thening follow the steps S500, air conditioner is made to enter defrosting mode；
If it is not, then return step S100.
In conclusion the decaying of defrosting control method of the invention by runing time, interior machine leaving air temp to air-conditioning
Rate, outer machine coil temperature and environment temperature carry out comprehensive descision, whether execute defrosting mode provided with more accurate for air conditioner
Decision condition, so as to accurately determine that air conditioner enters the opportunity of defrosting mode, be avoided as much as occurring false defrosting or
The case where person's defrosting lag.Preferably, by by the attenuation rate of outer machine coil temperature and interior machine leaving air temp and environment temperature it
Between be preset with mapping relations, to further increase the accuracy of judgement, to ensure that the timeliness of air conditioner defrosting and have
Effect property.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of defrosting control method of air conditioner, which is characterized in that the air conditioner includes indoor unit and outdoor unit, the room
Outer machine includes outer machine coil pipe, which comprises
In the case of air conditioner is in heating condition, the environment temperature of the outdoor unit position is obtained；
Obtain outer machine coil temperature and interior machine leaving air temp；
According to the environment temperature, the outer machine coil temperature and the interior machine leaving air temp, selectively make the air-conditioning
Device enters defrosting mode.
2. the method according to claim 1, wherein " according to the environment temperature, the outer machine coil temperature with
And the interior machine leaving air temp, so that the air conditioner is entered defrosting mode " it specifically includes:
According to the interior machine leaving air temp, the attenuation rate of the interior machine leaving air temp is calculated；
According to the environment temperature, the attenuation rate of the outer machine coil temperature and the interior machine leaving air temp, selectively make
The air conditioner enters defrosting mode.
3. according to the method described in claim 2, it is characterized in that, " according to the environment temperature, the outer machine coil temperature with
And the attenuation rate of the interior machine leaving air temp, so that the air conditioner is entered defrosting mode " it specifically includes:
Judge whether the air conditioner meets following condition:
Condition 11: the environment temperature is less than or equal to the first preset temperature；
Condition 12: the outer machine coil temperature continues to be less than or equal to the second preset temperature in the first preset time；
Condition 13: the attenuation rate of the interior machine leaving air temp is more than or equal to default attenuation rate；
In the case of the air conditioner meets above-mentioned 3 conditions simultaneously, the air conditioner is made to enter defrosting mode；
Wherein, second preset temperature and/or the default attenuation rate are determined by the environment temperature.
4. the method according to claim 1, wherein when the increase of indoor unit load or oil return fortune of the air conditioner
When turning, " according to the environment temperature, the outer machine coil temperature and the interior machine leaving air temp, selectively make the sky
Device is adjusted to enter defrosting mode " it specifically includes:
Judge whether the air conditioner meets following condition:
Condition 21: the environment temperature is less than or equal to the first preset temperature；
Condition 22: the outer machine coil temperature continues to be less than or equal to the second preset temperature in the first preset time；
In the case of the air conditioner meets above-mentioned 2 conditions simultaneously, the air conditioner is made to enter defrosting mode；
Wherein, second preset temperature is determined by the environment temperature.
5. according to the method described in claim 3, it is characterized in that, second preset temperature includes multiple temperature thresholds, often
The environment temperature in a temperature threshold and preset temperature section has preset first mapping relations；And/or
The default attenuation rate includes multiple attenuation rate threshold values, the ring of each the attenuation rate threshold value and preset temperature section
Border temperature has preset second mapping relations.
6. according to the method described in claim 5, it is characterized in that, the preset temperature section includes the first temperature range and the
Two temperature ranges, the minimum value of first temperature range are greater than the maximum value in the second temperature section,
Second preset temperature includes the first temperature threshold and second temperature threshold value, first temperature threshold and described first
Temperature range, the second temperature threshold value and the second temperature section are respectively provided with preset first mapping relations；
The default attenuation rate include the first attenuation rate threshold value and the second attenuation rate threshold value, the first attenuation rate threshold value with it is described
First temperature range, the second attenuation rate threshold value and the second temperature section are respectively provided with preset second mapping relations；
Wherein, first temperature threshold is more than or equal to the second temperature threshold value, and the first attenuation rate threshold value is more than or equal to
The second attenuation rate threshold value.
7. according to the method described in claim 2, it is characterized in that, " according to the interior machine leaving air temp, calculating the interior machine and going out
The attenuation rate of air temperature " specifically includes:
When the outer machine coil temperature is equal to the second preset temperature, obtains interior machine leaving air temp and machine in initial is used as to go out wind-warm syndrome
Degree；
Obtain machine leaving air temp in primary current every the second preset time, and according to it is described it is current in machine leaving air temp and described
Machine leaving air temp calculates the attenuation rate of the interior machine leaving air temp in initial.
8. method according to any one of claim 1 to 7, which is characterized in that the method also includes:
Obtain the operation duration that the air conditioner is continuously in heating mode；
According to the environment temperature, the operation duration, the outer machine coil temperature and the interior machine leaving air temp, selectively
The air conditioner is set to enter defrosting mode.
9. according to the method described in claim 8, it is characterized in that, " according to the environment temperature, operation duration, described
Outer machine coil temperature and the interior machine leaving air temp, selectively make the air conditioner enter defrosting mode " it specifically includes:
The attenuation rate of the interior machine leaving air temp is calculated according to the interior machine leaving air temp；
Judge whether the air conditioner meets following condition:
Condition 31: the operation duration is more than or equal to third preset time；
Condition 32: the environment temperature is less than or equal to the first preset temperature；
Condition 33: the outer machine coil temperature continues to be less than or equal to the second preset temperature in the first preset time；
Condition 34: the attenuation rate of the interior machine leaving air temp is more than or equal to default attenuation rate；
In the case of the air conditioner meets above-mentioned 4 conditions simultaneously, the air conditioner is made to enter defrosting mode；
Wherein, second preset temperature and/or the default attenuation rate are determined by the environment temperature.
10. a kind of air conditioner, which is characterized in that the air conditioner includes controller, and the controller requires 1 for perform claim
To air conditioner defrosting control method described in any one of 9.
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| CN110762758A (en) * | 2019-11-07 | 2020-02-07 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device of air conditioner and air conditioner |
| CN110940055A (en) * | 2019-12-16 | 2020-03-31 | 宁波奥克斯电气股份有限公司 | Heating and defrosting control method and device for air conditioner and air conditioner |
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| CN113883661A (en) * | 2020-07-03 | 2022-01-04 | 青岛海尔空调电子有限公司 | Defrosting control method for multi-split air conditioning system |
| CN114659234A (en) * | 2022-02-28 | 2022-06-24 | 青岛海尔空调电子有限公司 | Method and device for defrosting of air conditioner and air conditioner |
| CN114893865A (en) * | 2022-06-17 | 2022-08-12 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device, electronic equipment and storage medium |
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| CN111043719A (en) * | 2019-12-30 | 2020-04-21 | Tcl空调器(中山)有限公司 | Air conditioner system, air conditioner heating temperature control method and air conditioner |
| CN111141006A (en) * | 2019-12-30 | 2020-05-12 | 宁波奥克斯电气股份有限公司 | Control method and control device for defrosting of air conditioner, storage medium and air conditioner |
| CN113587364A (en) * | 2020-04-30 | 2021-11-02 | 青岛海尔空调电子有限公司 | Defrosting control method for multi-split air conditioning unit |
| CN113883661A (en) * | 2020-07-03 | 2022-01-04 | 青岛海尔空调电子有限公司 | Defrosting control method for multi-split air conditioning system |
| CN112460740A (en) * | 2020-11-30 | 2021-03-09 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN113124544A (en) * | 2021-04-20 | 2021-07-16 | 青岛海尔空调电子有限公司 | Air conditioning unit and defrosting control method thereof |
| CN114659234A (en) * | 2022-02-28 | 2022-06-24 | 青岛海尔空调电子有限公司 | Method and device for defrosting of air conditioner and air conditioner |
| CN114659234B (en) * | 2022-02-28 | 2024-02-23 | 青岛海尔空调电子有限公司 | Method and device for defrosting air conditioner and air conditioner |
| CN114893865A (en) * | 2022-06-17 | 2022-08-12 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device, electronic equipment and storage medium |
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