CN106091251A - A kind of dirty stifled determination methods for heat exchanger, device and air-conditioning - Google Patents
A kind of dirty stifled determination methods for heat exchanger, device and air-conditioning Download PDFInfo
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- CN106091251A CN106091251A CN201610416176.4A CN201610416176A CN106091251A CN 106091251 A CN106091251 A CN 106091251A CN 201610416176 A CN201610416176 A CN 201610416176A CN 106091251 A CN106091251 A CN 106091251A
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- unit
- defrost
- heat exchanger
- defrost cycle
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- 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
- F24F2110/50—Air quality properties
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
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- Quality & Reliability (AREA)
- Air Conditioning Control Device (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a kind of dirty stifled determination methods for heat exchanger, device and air-conditioning, the method includes: obtains the unit operation essential information of described heat exchanger place unit local environment, and obtains the defrost cycle of described unit；In the first preset duration, when described unit operation essential information meets and presets unit operation essential information and described defrost cycle time, determine that described heat exchanger is dirty stifled.The solution of the present invention, can overcome heat transfer effect difference in prior art, maintenance difficulties big and the defect such as poor user experience, it is achieved the beneficial effect that good effect of heat exchange, maintenance difficulties are little and Consumer's Experience is good.
Description
Technical field
The invention belongs to air-conditioning technical field, be specifically related to a kind of dirty stifled determination methods for heat exchanger, device and sky
Adjust.
Background technology
The process of refrigerastion of refrigeration system, is the working substance steam sucking lower pressure, after being allowed to pressure rising, is condensed into pressure
Higher liquid；After throttling, after becoming the relatively low liquid of pressure, heat absorption is evaporated and is become the relatively low steam of pressure, then to pressure
The relatively low steam of power carries out boosting process, completes kind of refrigeration cycle.Refrigeration system is mainly swollen by compressor, outdoor heat exchanger, electronics
Swollen valve, indoor heat exchanger composition, wherein, outdoor heat exchanger carries outside refrigerant and air carries out the effect of heat exchange.Change
The heat transfer effect of hot device (especially outdoor heat exchanger) significantly affects the operational effect of refrigeration system.
Refrigeration system is in During Process of Long-term Operation, owing to outdoor heat exchanger is installed in outdoor environment, long-term by outdoor
The impact of environment, in the air such as dust granules, impurity can be attached on outdoor heat exchanger surface, causes outdoor heat exchanger dirty stifled, impact
The heat transfer effect of outdoor heat exchanger.Meanwhile, the impact of heat exchanging effect, can show in the operational factor of refrigeration system, especially
It is the impact on the refrigeration system defrost cycle.
In prior art, have that heat transfer effect difference, maintenance difficulties be big and the defect such as poor user experience.
Content of the invention
It is an object of the invention to, for drawbacks described above, provide a kind of dirty stifled determination methods for heat exchanger, device and
Air-conditioning, affects the problem of heat transfer effect to solve dirty the blocking up of outdoor heat exchanger in prior art, reaches to promote the effect of heat transfer effect
Really.
The present invention provides a kind of dirty stifled determination methods for heat exchanger, comprising: obtain described heat exchanger place unit institute
The unit operation essential information of place's environment, and obtain the defrost cycle of described unit；In the first preset duration, when described unit
When running the satisfied default unit operation essential information of essential information and described defrost cycle time, determine that described heat exchanger is dirty stifled.
Alternatively, also comprise determining that described heat exchanger dirty stifled after, continue to obtain the described defrost cycle of described unit, and
Obtain described unit dirty stifled when heat information when heating mode；In the second preset duration, when describedization continuing acquisition
The frost cycle constantly shortens and the described information that heats meets and presets when heating condition, determines and is carried out described heat exchanger.
Alternatively, described heat information meet preset heat condition, comprising: during described unit heating operation, described unit
Indoor fan wind pushing temperature less than preset heat wind pushing temperature；Or, during described unit refrigerating operaton, the room of described unit
The wind pushing temperature of inner blower is higher than default refrigeration wind pushing temperature.
Alternatively, described unit operation essential information is obtained, comprising: obtain the environment weather information based on weather forecast；
Described environment weather information, comprising: temperature, humidity, wind direction, wind-force, haze index at least one；And/or, obtain by communicating
The unit operation essential information that module provides；Described unit operation essential information, comprising: running environment during described unit operation
Wet and dry bulb temperature, the operating load rate of unit, outdoor heat exchanger condition of work at least one.
Alternatively, the defrost cycle of described unit is obtained, comprising: obtain described unit normal during adjacent defrost twice
The time run；According to the described time, determine the described defrost cycle.
Alternatively, the described unit time properly functioning during adjacent defrost twice is obtained, comprising: obtain by heat exchanger
The defrost temperature that the temperature-sensitive bag of heat exchange pipe external surface collects；When described unit is under identical described unit operation essential information
During heating operation, if described defrost temperature is less than default defrost temperature, it is determined that unit enters defrost process；According to described unit
Enter the time of described defrost process, obtain the described unit time properly functioning during adjacent defrost twice.
Alternatively, the described defrost cycle, comprising: actual defrost cycle and target defrost cycle；Correspondingly, change described in determination
Hot device is dirty stifled, comprising: according to described unit operation essential information, determines the actual defrost cycle of described unit, and with default
The target defrost cycle contrasts；When the described actual defrost cycle be less than described target defrost cycle and described target defrost cycle with
When the difference in described actual defrost cycle is more than predetermined threshold value, determine that described heat exchanger is dirty stifled.
Matching with said method, another aspect of the present invention provides a kind of dirty stifled judgment means for heat exchanger, comprising:
Acquiring unit, is used for obtaining the unit operation essential information of described heat exchanger place unit local environment, and obtains described unit
The defrost cycle；Determining unit, in the first preset duration, presets unit fortune when described unit operation essential information meets
When row essential information and described defrost cycle time, determine that described heat exchanger is dirty stifled.
Alternatively, also include: cleaning unit, be used for determining described heat exchanger dirty stifled after, continue to obtain the institute of described unit
State the defrost cycle, and obtain described unit dirty stifled when heat information when heating mode；And, in the second preset duration
In, when continue obtain the described defrost cycle constantly shorten and described heat information meet preset heat condition when, determine to institute
State heat exchanger to be carried out.
Alternatively, described cleaning unit, comprising: heat dirty stifled judge module, during for described unit heating operation, described
The wind pushing temperature of the indoor fan of unit heats wind pushing temperature less than presetting；Or, freeze dirty stifled judge module, is used for described machine
During group refrigerating operaton, the wind pushing temperature of the indoor fan of described unit is higher than default refrigeration wind pushing temperature.
Alternatively, acquiring unit, comprising: weather forecast acquisition module, for obtaining the environment weather based on weather forecast
Information；Described environment weather information, comprising: temperature, humidity, wind direction, wind-force, haze index at least one；And/or, run
Data obtaining module, for obtaining the unit operation essential information being provided by communication module；Described unit operation essential information, bag
Include: during described unit operation, the wet and dry bulb temperature of running environment, the operating load rate of unit, outdoor heat exchanger condition of work are extremely
One of few.
Alternatively, acquiring unit, also includes: defrost period determination module, is used for obtaining described unit and changes twice adjacent
Time properly functioning between frost season；And, for according to the described time, determine the described defrost cycle.
Alternatively, defrost period determination module, comprising: temperature acquisition submodule, outside obtaining by heat exchanger heat-exchanging tube
The defrost temperature that the temperature-sensitive bag on surface collects；Defrost determines submodule, for transporting at identical described unit when described unit
Under row essential information during heating operation, if described defrost temperature is less than default defrost temperature, it is determined that unit enters defrost process；
Time obtains submodule, for entering the time of described defrost process according to described unit, obtain described unit adjacent twice
Time properly functioning during defrost.
Alternatively, the described defrost cycle, comprising: actual defrost cycle and target defrost cycle；Correspondingly, determining unit,
Including: computing module, for according to described unit operation essential information, determine the actual defrost cycle of described unit, and with in advance
If the target defrost cycle contrast；It is less than described target defrost cycle and described target defrost week when the described actual defrost cycle
When the difference in phase and described actual defrost cycle is more than predetermined threshold value, determine that described heat exchanger is dirty stifled.
Matching with said apparatus, further aspect of the present invention provides a kind of air-conditioning, comprising: above-described for heat exchanger
Dirty stifled judgment means.
The solution of the present invention, the unit operation essential information of detection refrigeration system and defrost cycle, comprehensive descision unit room
The dirty stifled situation of external heat exchanger, and then be readily recognized the dirty stifled situation of heat exchanger, intervening when necessary, thus improves
The heat transfer effect of heat exchanger.
Further, the solution of the present invention, the unit operation essential information of detection refrigeration system is (for example: unit operation is basic
Information) and defrost cycle, the dirty stifled situation of reflection unit outdoor heat exchanger, and in time outdoor heat exchanger is carried out, thus
Improve the heat transfer effect of heat exchanger, and the difficulty that heat exchanger is safeguarded is little, also help the experience promoting user.
Further, the solution of the present invention, by the acquisition of the unit operation essential information to unit for the GPRS, combines and runs number
According to being analyzed, when, in the long date, unit climatic environment is severe, and simultaneously identical external parameter is (for example: unit operation is believed substantially
Breath) under the conditions of, during unit defrost cycle time, then judge that refrigeration system outdoor heat exchanger is dirty stifled.
Thus, the solution of the present invention, the unit operation essential information according to unit and defrost cycle comprehensive descision unit room
The dirty stifled situation of external heat exchanger and dirty stifled when clean in time, solve outdoor heat exchanger in prior art dirty stifled and affect heat exchange
The problem of effect, thus, overcome heat transfer effect difference in prior art, maintenance difficulties big and the defect of poor user experience, it is achieved to change
The beneficial effect that thermal effect is good, maintenance difficulties is little and Consumer's Experience is good.
Other features and advantages of the present invention will illustrate in the following description, and, partly become from specification
Obtain it is clear that or understood by implementing the present invention.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description
Fig. 1 is the flow chart of an embodiment of the dirty stifled determination methods for heat exchanger of the present invention；
Fig. 2 be the present invention method in the flow chart of an embodiment of cleaning treatment；
Fig. 3 be the present invention method in the flow chart of an embodiment that processes of defrost cycle acquisition；
Fig. 4 be the present invention method in the flow chart of an embodiment that processes of defrost cycle determination；
Fig. 5 is the structural representation of an embodiment of the dirty stifled judgment means for heat exchanger of the present invention；
Fig. 6 is the structural representation of the embodiment that the determination of defrost cycle is processed in assembly of the invention；
Fig. 7 is the principle schematic that the air-conditioning apoplexy involving the solid organs of the present invention blocks up the embodiment affecting heat transfer effect；
Fig. 8 is the principle schematic that the air-conditioning apoplexy involving the solid organs of the present invention blocks up the embodiment that judgement is processed.
In conjunction with accompanying drawing, in the embodiment of the present invention, reference is as follows:
102-acquiring unit；1022-weather forecast acquisition module；1024-operation information acquisition module；1026-defrost week
Phase determining module；10262-temperature acquisition submodule；10264-defrost determines submodule；The 10266-time obtains submodule；
104-determining unit；1042-computing module；106-cleaning unit；1062-heats dirty stifled judge module；Dirty the blocking up of 1064-refrigeration is sentenced
Disconnected module.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described by corresponding accompanying drawing.Obviously, described embodiment is only the present invention one
Section Example, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The every other embodiment being obtained under the premise of going out creative work, broadly falls into the scope of protection of the invention.
According to embodiments of the invention, provide a kind of dirty stifled determination methods for heat exchanger, the present invention as shown in Figure 1
The flow chart of an embodiment of method.This dirty stifled determination methods being used for heat exchanger may include that
At step S110, obtain the unit operation essential information of described heat exchanger place unit local environment, and obtain
The defrost cycle of described unit.
For example: obtain the unit operation essential information of unit local environment.
For example: communication module (for example: GPRS module) is installed on unit, with unit real-time communication.Pass through GPRS module
Can collect unit location head of district's date (for example: in preset duration) unit operation essential information (for example: temperature, humidity,
Wind direction wind-force, haze index etc.), then these parameters are transferred to unit.
Wherein, unit needs defrost when heating operation, does not needs defrost when refrigerating operaton.
Thus, by obtaining described unit operation essential information and described defrost cycle, as judging that heat exchanger is dirty stifled
Foundation, the mode that obtains is simple, reliable, and the reliability obtaining data is high.
Alternatively, in step s 110, obtain described unit operation essential information, may include that acquisition is pre-based on weather
The environment weather information of report.
Wherein, described environment weather information, comprising: temperature, humidity, wind direction, wind-force, haze index at least one.
For example: each department climate parameter providing from national authority meteorological department, such as haze degree, PM2.5 value, weather
Situation etc..
Thus, by obtaining the weather information based on weather forecast, obtain mode simple, obtain result accuracy good.
Alternatively, in step s 110, obtain described unit operation essential information, can also include: obtain by communication mould
The unit operation essential information that block provides.
Wherein, described unit operation essential information, comprising: the wet and dry bulb temperature of running environment, machine during described unit operation
Group operating load rate, outdoor heat exchanger condition of work at least one.
For example: the individual unit operation essential information of unit collected by unit self GPRS module, such as unit operation
When running environment wet and dry bulb temperature etc..
Thus, by obtaining the unit operation essential information being gathered by communication module, unit can be obtained easily certainly
The unit operation essential information of body running environment, workable, the convenience of acquisition is good.
Alternatively, in step s 110, obtain the defrost cycle of described unit, may include that based on described unit in phase
Time properly functioning during adjacent defrost twice, carry out the acquisition in defrost cycle.
Below in conjunction with the flow chart of the embodiment that defrost cycle acquisition in the method for the present invention shown in Fig. 3 is processed, enter one
The detailed process in the defrost cycle obtaining described unit of step explanation step S110.
Step S310, obtains the described unit time properly functioning during adjacent defrost twice.
For example: the defrost cycle of unit is added up, normally heat during the adjacent defrost twice of defrost cycle i.e. unit
The time run.
Alternatively, in step S310, unit can be obtained by the defrost temperature of heat collecting exchanger heat exchange pipe external surface
Time properly functioning during adjacent defrost twice.
Below in conjunction with the flow chart of the embodiment that defrost cycle determination in the method for the present invention shown in Fig. 4 is processed, enter one
Step explanation step S310 obtains the detailed process of described unit time properly functioning during adjacent defrost twice.
Step S410, obtains the defrost temperature being collected by the temperature-sensitive bag of heat exchanger heat-exchanging tube outer surface.
For example: at unit outdoor heat exchanger heat exchange pipe external surface, temperature-sensitive bag i.e. defrost temperature temperature-sensitive bag is installed, defrost is detected
Temperature.
Step S420, when described unit heating operation under identical described unit operation essential information, if describedization
Frost temperature is less than default defrost temperature, it is determined that unit enters defrost process.
For example: when unit heating operation under dry, wet-bulb temperature environment outside given chamber, if defrost temperature is special less than certain
Definite value, then unit enters defrost.
Step S430, enters the time of described defrost process, obtains described unit and change twice adjacent according to described unit
Time properly functioning between frost season.
Thus, by the defrost temperature of heat collecting exchanger heat exchange pipe external surface, unit is obtained during adjacent defrost twice
The properly functioning time, acquisition mode is safe and reliable and accurate data good.
Step S320, according to the described time, determines the described defrost cycle.
For example: obtain the defrost cycle of unit.
Thus, by the time properly functioning during adjacent defrost twice based on described unit, the defrost cycle is carried out
Obtaining, reliability is high, and accuracy is good.
At step S120, in the first preset duration, preset unit operation when described unit operation essential information meets
When essential information and described defrost cycle time, determine that described heat exchanger is dirty stifled.
In one example, the dirty stifled situation of comprehensive descision outdoor heat exchanger.
For example: when outdoor heat exchanger dirty stifled when, during heating operation, outdoor heat exchanger heat transfer effect can be deteriorated, and is equivalent to
In heat exchanger, refrigerant and the heat exchange thermal resistance of air in the external world increase.At identical conditions (for example: outdoor dry bulb and wet bulb phase
With), in outdoor heat exchanger, the evaporating temperature of refrigerant can reduce, thus causes defrost temperature to reduce, and defrost temperature can be quickly down to
Defrost threshold value, unit quickly enters defrost, i.e. the defrost cycle can shorten.
In one example, heat exchanger is dirty stifled when judging, is based primarily upon two conditions.Wherein, bar is mainly judged
Part is: defrost mechanical periodicity；Auxiliary judgment condition is: the unit operation essential information change on machine group leader's date.
For example: combine the unit operation essential information change on machine group leader's date, and the change in unit defrost cycle, permissible
Judge the dirty stifled situation of unit outdoor heat exchanger.
When the unit operation essential information performance on machine group leader's date is: units' installation amblent air temperature haze is very serious, with
When unit defrost cycle time when, then can illustrate that unit outdoor heat exchanger occurs dirty stifled.
Because unit defrost cycle time, reason might not be that heat exchanger is dirty stifled entirely, may have other reasons.But machine
Group defrost cycle time, unit local climate parameter haze always, then unit defrost cycle time reason in this time simultaneously
Substantially can be determined that heat exchanger is dirty stifled.
Thus, by the comprehensive descision based on unit operation essential information and defrost cycle, determine that whether dirty heat exchanger is stifled,
Deterministic process is safely, succinctly, it is judged that reliable results.
Alternatively, the described defrost cycle, may include that actual defrost cycle and target defrost cycle.
Alternatively, in the step s 120, determine that described heat exchanger is dirty stifled, may include that according to described unit operation basic
Information, determines the actual defrost cycle of described unit, and contrasts with the default target defrost cycle；When the described actual defrost cycle
It is more than predetermined threshold value less than described target defrost cycle and described target defrost cycle with the difference in described actual defrost cycle
When, determine that described heat exchanger is dirty stifled.
Visible, can be by contrast target defrost cycle T ｀DefrostWith actual defrost cycle TDefrost, determine that whether dirty unit is stifled.
For example: when described defrost cycle and described unit operation essential information, meet function TDefrostDuring=F (tsur, α, β),
Described heat exchanger is dirty stifled.Wherein, TDefrostRepresenting the defrost cycle of unit, tsur represents outdoor environment wet and dry bulb temperature, and α represents machine
The operating load rate of group, β represents outdoor heat exchanger condition of work, and tsur, α, β are unit operation essential information.
Wherein, F is only one and enumerates function, only represents for specific tsur, α, β, has a corresponding target
Defrost cycle T｀ defrost, when actual defrost cycle TDefrostAway from T｀ defrostWhen, then show that unit is abnormal, such as actual defrost cycle TDefrostFar little
In target defrost cycle T｀ defrostWhen, then show that heat exchanger is dirty stifled.
In one example, the defrost cycle of unit and outdoor environment wet and dry bulb temperature, operating load, outdoor heat exchanger change
Heat is related.
For example: meet function TDefrost=F (tsur, α, β).Wherein, TDefrostRepresenting the defrost cycle of unit, tsur represents outdoor
Environment wet and dry bulb temperature, α represents operating load rate, β represent outdoor heat exchanger dirty stifled when heat exchange situation.
Wherein, the sensor observing and controlling that α, β can be carried by current unit is arrived, and belongs to the internal ginseng of unit self-operating
Number；Outdoor heat exchanger information includes structural parameters and pressure, the temperature of the heat exchangers self such as outdoor heat exchanger area, fin configuration
Etc. parameter, unit current institute belt sensor can detect.
In one example, in identical condition (for example: outdoor environment wet and dry bulb temperature, operating load, heat exchanger change
Heat) when, the defrost cycle is essentially identical.When heat exchanger occur dirty stifled when, heat exchanger heat transfer effect be deteriorated, heat exchanger evaporating temperature meeting
Reducing, heat exchanger is easier to enter defrost, i.e. defrost cycle time.Wherein, identical condition is (for example: outdoor environment wet and dry bulb
Temperature, operating load and defrost cycle TDefrost) contrast, can contrast in units of sky, week, the moon, year.
For example: N week, certain outdoor environment wet and dry bulb temperature, under the conditions of operating load, defrost cycle=M min.Work as machine
When group was run to N+1 week, under the conditions of identical outdoor environment wet and dry bulb temperature, operating load, the defrost cycle of unit=
(M-15) min, i.e. defrost cycle time 15min, shows that heat exchanger is likely to occur dirty stifled situation.Wherein, 15min only as a example by
Lift, the shortening time in actual defrost cycle, it may be possible to other values；N, M are natural number.
Thus, by the functional relation between unit operation essential information and defrost cycle, can promote further based on
Unit operation essential information and defrost cycle judge the whether dirty stifled reliability of heat exchanger and security, and judged result accuracy
Good, it is judged that mode highly versatile.
In an optional embodiment, the dirty stifled situation of heat exchanger of integrating step S120 determination, can be dirty at heat exchanger
Further determine whether when blocking up serious to need to clean.
Below in conjunction with the flow chart of an embodiment of cleaning treatment in the method for the present invention shown in Fig. 2, further illustrate
Heat exchanger dirty stifled serious when further determine whether the detailed process that needs to clean.
Step S210, determine described heat exchanger dirty stifled after, continue to obtain the described defrost cycle of described unit, and obtain institute
State unit dirty stifled when heat information when heating mode.
Step S220, in the second preset duration, when the described defrost cycle continuing to obtain constantly shortens and described heats
Information meets to be preset when heating condition, determines and is carried out described heat exchanger.
In one example, if interior for a long time, the unit defrost cycle constantly shortens, and when affecting unit heating effect,
Then point out unit outdoor heat exchanger dirty stifled very serious, need periodically to be carried out.
For example: N week, certain outdoor environment wet and dry bulb temperature, under the conditions of operating load, defrost cycle=M min, unit
Heating operation, indoor environment temperature P DEG C.When unit operation to N+1 week, identical outdoor environment wet and dry bulb temperature, fortune
Under row loading condiction, the defrost cycle of unit=(M-15) min, indoor environment temperature is only capable of reaching (P-5) DEG C, then shows outdoor
Heat exchanger is likely to occur dirty stifled situation；Meanwhile, now outdoor heat exchanger is dirty blocks up the operational effect having affected unit, so that shadow
Ring the heating effect of indoor.Wherein, indoor environment temperature P and (P-5) DEG C, by way of example only, actual indoor environment temperature
It is probably other values.
Thus, it is judged that heat exchanger dirty stifled after, can determine whether dirty stifled whether serious, and dirty stifled serious when determination
Clean, to promote the experience of the heat transfer effect of heat exchanger and user.
Alternatively, in step S220, described heat information meet preset heat condition, may include that described unit system
When heat is run, the wind pushing temperature of the indoor fan of described unit heats wind pushing temperature less than presetting.
For example: in unit heating operation, machine wind pushing temperature is on the low side.
Alternatively, in step S220, described heat information meet preset heat condition, can also include: described unit
During refrigerating operaton, the wind pushing temperature of the indoor fan of described unit is higher than default refrigeration wind pushing temperature.
For example: in unit refrigerating operaton, machine wind pushing temperature is higher.
Thus, by judging the wind pushing temperature of indoor fan when heating mode or refrigeration mode, it may be determined that heat exchanger
Dirty stifled serious conditions, and then determine whether to clean, on the one hand the judged result of the dirty stifled situation of heat exchanger is precisely, reliably, separately
On the one hand being easy to safeguard in time heat exchanger, Consumer's Experience is good.
Through substantial amounts of verification experimental verification, using the technical scheme of the present embodiment, the unit operation of detection refrigeration system is believed substantially
Breath and defrost cycle, the dirty stifled situation of comprehensive descision unit outdoor heat exchanger, and then it is readily recognized the dirty stifled situation of heat exchanger,
Intervening when necessary, thus improve the heat transfer effect of heat exchanger.
According to embodiments of the invention, additionally provide the one corresponding to the dirty stifled determination methods for heat exchanger for changing
The dirty stifled judgment means of hot device.The structural representation of one embodiment of assembly of the invention shown in Figure 4.This is used for heat exchanger
Dirty stifled judgment means may include that
In one embodiment, acquiring unit 102, may be used for obtaining described heat exchanger place unit local environment
Unit operation essential information, and obtain the defrost cycle of described unit.The concrete function of this acquiring unit 102 and process see step
Rapid S110.
For example: obtain the unit operation essential information of unit local environment.
For example: communication module (for example: GPRS module) is installed on unit, with unit real-time communication.Pass through GPRS module
Can collect unit location head of district's date (for example: in preset duration) unit operation essential information (for example: temperature, humidity,
Wind direction wind-force, haze index etc.), then these parameters are transferred to unit.
Wherein, unit needs defrost when heating operation, does not needs defrost when refrigerating operaton.
Thus, by obtaining described unit operation essential information and described defrost cycle, as judging that heat exchanger is dirty stifled
Foundation, the mode that obtains is simple, reliable, and the reliability obtaining data is high.
Alternatively, acquiring unit 102, may include that weather forecast acquisition module 1022 and/or operation information acquisition module
1024。
In one example, weather forecast acquisition module 1022, may be used for obtaining the environment weather based on weather forecast
Information.
Wherein, described environment weather information, comprising: temperature, humidity, wind direction, wind-force, haze index at least one.
For example: each department climate parameter providing from national authority meteorological department, such as haze degree, PM2.5 value, weather
Situation etc..
Thus, by obtaining the weather information based on weather forecast, obtain mode simple, obtain result accuracy good.
In one example, operation information acquisition module 1024, may be used for obtaining the unit fortune being provided by communication module
Row essential information.
Wherein, described unit operation essential information, comprising: the wet and dry bulb temperature of running environment, machine during described unit operation
Group operating load rate, outdoor heat exchanger condition of work at least one.
For example: the individual unit operation essential information of unit collected by unit self GPRS module, such as unit operation
When running environment wet and dry bulb temperature etc..
Thus, by obtaining the unit operation essential information being gathered by communication module, unit can be obtained easily certainly
The unit operation essential information of body running environment, workable, the convenience of acquisition is good.
Alternatively, acquiring unit 102, can also include: defrost period determination module 1026.Determine mould by the defrost cycle
Block 1026, can carry out the acquisition in defrost cycle based on described unit time properly functioning during adjacent defrost twice.
In one example, defrost period determination module 1026, may be used for obtaining described unit in adjacent defrost twice
Properly functioning time period.The concrete function of this defrost period determination module 1026 and process see step S310.
For example: the defrost cycle of unit is added up, normally heat during the adjacent defrost twice of defrost cycle i.e. unit
The time run.
Alternatively, in defrost period determination module 1026, can be by the defrost of heat collecting exchanger heat exchange pipe external surface
Temperature, obtains the unit time properly functioning during adjacent defrost twice.
Below in conjunction with the structural representation of the embodiment that defrost cycle determination in assembly of the invention shown in Fig. 6 is processed,
Further illustrate the concrete structure of defrost period determination module 1026.Defrost period determination module 1026, may include that temperature is adopted
Collection submodule the 10262nd, defrost determines that submodule 10264 and time obtain submodule 10266.
In a specific example, temperature acquisition submodule 10262, may be used for obtaining by heat exchanger heat-exchanging tube outer surface
The defrost temperature that collects of temperature-sensitive bag.The concrete function of this temperature acquisition submodule 10262 and process see step S410.
For example: at unit outdoor heat exchanger heat exchange pipe external surface, temperature-sensitive bag i.e. defrost temperature temperature-sensitive bag is installed, defrost is detected
Temperature.
In a specific example, defrost determines submodule 10264, may be used for when described unit is at identical described machine
When group runs heating operation under essential information, if described defrost temperature is less than default defrost temperature, it is determined that unit enters defrost
Process.This defrost determines that the concrete function of submodule 10264 and process see step S420.
For example: when unit heating operation under dry, wet-bulb temperature environment outside given chamber, if defrost temperature is special less than certain
Definite value, then unit enters defrost.
In a specific example, the time obtains submodule 10266, may be used for entering described defrost according to described unit
The time of process, obtain the described unit time properly functioning during adjacent defrost twice.This time obtains submodule 10266
Concrete function and process see step S430.
Thus, by the defrost temperature of heat collecting exchanger heat exchange pipe external surface, unit is obtained during adjacent defrost twice
The properly functioning time, acquisition mode is safe and reliable and accurate data good.
In one example, defrost period determination module 1026, can be also used for, according to the described time, determining described defrost
Cycle.The concrete function of this defrost period determination module 1026 and process see step S320.
For example: obtain the defrost cycle of unit.
Thus, by the time properly functioning during adjacent defrost twice based on described unit, the defrost cycle is carried out
Obtaining, reliability is high, and accuracy is good.
In one embodiment, determining unit 104, may be used in the first preset duration, when described unit operation
When essential information meets default unit operation essential information and described defrost cycle time, determine that described heat exchanger is dirty stifled.This is true
The concrete function of cell 104 and process see step S120.
In one example, the dirty stifled situation of comprehensive descision outdoor heat exchanger.
For example: when outdoor heat exchanger dirty stifled when, during heating operation, outdoor heat exchanger heat transfer effect can be deteriorated, and is equivalent to
In heat exchanger, refrigerant and the heat exchange thermal resistance of air in the external world increase.At identical conditions (for example: outdoor dry bulb and wet bulb phase
With), in outdoor heat exchanger, the evaporating temperature of refrigerant can reduce, thus causes defrost temperature to reduce, and defrost temperature can be quickly down to
Defrost threshold value, unit quickly enters defrost, i.e. the defrost cycle can shorten.
In one example, heat exchanger is dirty stifled when judging, is based primarily upon two conditions.Wherein, bar is mainly judged
Part is: defrost mechanical periodicity；Auxiliary judgment condition is: the unit operation essential information change on machine group leader's date.
For example: combine the unit operation essential information change on machine group leader's date, and the change in unit defrost cycle, permissible
Judge the dirty stifled situation of unit outdoor heat exchanger.
When the unit operation essential information performance on machine group leader's date is: units' installation amblent air temperature haze is very serious, with
When unit defrost cycle time when, then can illustrate that unit outdoor heat exchanger occurs dirty stifled.
Because unit defrost cycle time, reason might not be that heat exchanger is dirty stifled entirely, may have other reasons.But machine
Group defrost cycle time, unit local climate parameter haze always, then unit defrost cycle time reason in this time simultaneously
Substantially can be determined that heat exchanger is dirty stifled.
Thus, by the comprehensive descision based on unit operation essential information and defrost cycle, determine that whether dirty heat exchanger is stifled,
Deterministic process is safely, succinctly, it is judged that reliable results.
Alternatively, the described defrost cycle, may include that actual defrost cycle and target defrost cycle.
Optionally it is determined that unit 104, may include that computing module 1042.
In one example, computing module 1042, may be used for, according to described unit operation essential information, determining described machine
The actual defrost cycle of group, and contrast with the default target defrost cycle；It is less than described targeted when the described actual defrost cycle
When the difference in frost cycle and described target defrost cycle and described actual defrost cycle is more than predetermined threshold value, determine described heat exchange
Device is dirty stifled.
Visible, can be by contrast target defrost cycle T ｀DefrostWith actual defrost cycle TDefrost, determine that whether dirty unit is stifled.
For example: when described defrost cycle and described unit operation essential information, meet function TDefrostDuring=F (tsur, α, β),
Described heat exchanger is dirty stifled.Wherein, TDefrostRepresenting the defrost cycle of unit, tsur represents outdoor environment wet and dry bulb temperature, and α represents machine
The operating load rate of group, β represents outdoor heat exchanger condition of work, and tsur, α, β are unit operation essential information.
Wherein, F is only one and enumerates function, only represents for specific tsur, α, β, has a corresponding target
Defrost cycle T｀ defrost, when actual defrost cycle TDefrostAway from T｀ defrostWhen, then show that unit is abnormal, such as actual defrost cycle TDefrostFar little
In target defrost cycle T｀ defrostWhen, then show that heat exchanger is dirty stifled.
In one example, the defrost cycle of unit and outdoor environment wet and dry bulb temperature, operating load, outdoor heat exchanger change
Heat is related.
For example: meet function TDefrost=F (tsur, α, β).Wherein, TDefrostRepresenting the defrost cycle of unit, tsur represents outdoor
Environment wet and dry bulb temperature, α represents operating load rate, β represent outdoor heat exchanger dirty stifled when heat exchange situation.
Wherein, the sensor observing and controlling that α, β can be carried by current unit is arrived, and belongs to the internal ginseng of unit self-operating
Number；Outdoor heat exchanger information includes structural parameters and pressure, the temperature of the heat exchangers self such as outdoor heat exchanger area, fin configuration
Etc. parameter, unit current institute belt sensor can detect.
In one example, in identical condition (for example: outdoor environment wet and dry bulb temperature, operating load, heat exchanger change
Heat) when, the defrost cycle is essentially identical.When heat exchanger occur dirty stifled when, heat exchanger heat transfer effect be deteriorated, heat exchanger evaporating temperature meeting
Reducing, heat exchanger is easier to enter defrost, i.e. defrost cycle time.Wherein, identical condition is (for example: outdoor environment wet and dry bulb
Temperature, operating load and defrost cycle TDefrost) contrast, can contrast in units of sky, week, the moon, year.
For example: N week, certain outdoor environment wet and dry bulb temperature, under the conditions of operating load, defrost cycle=M min.Work as machine
When group was run to N+1 week, under the conditions of identical outdoor environment wet and dry bulb temperature, operating load, the defrost cycle of unit=
(M-15) min, i.e. defrost cycle time 15min, shows that heat exchanger is likely to occur dirty stifled situation.Wherein, 15min only as a example by
Lift, the shortening time in actual defrost cycle, it may be possible to other values；N, M are natural number.
Thus, by the functional relation between unit operation essential information and defrost cycle, can promote further based on
Unit operation essential information and defrost cycle judge the whether dirty stifled reliability of heat exchanger and security, and judged result accuracy
Good, it is judged that mode highly versatile.
In an optional embodiment, in conjunction with determining unit 104, can also include: cleaning unit 106.By cleaning
Unit 106, in conjunction with the dirty stifled situation of heat exchanger determining, can heat exchanger dirty stifled serious when further determine whether to need clear
Wash.
In one example, cleaning unit 106, be determined for described heat exchanger dirty stifled after, continue to obtain described machine
The described defrost cycle of group, and obtain described unit dirty stifled when heat information when heating mode.The tool of this cleaning unit 106
Body function and process see step S210.
In one example, cleaning unit 106, can be also used in the second preset duration, when described in continuation acquisition
The defrost cycle constantly shortens and the described information that heats meets and presets when heating condition, determines and is carried out described heat exchanger.Should
The concrete function of cleaning unit 106 and process are referring further to step S220.
In one example, if interior for a long time, the unit defrost cycle constantly shortens, and when affecting unit heating effect,
Then point out unit outdoor heat exchanger dirty stifled very serious, need periodically to be carried out.
For example: N week, certain outdoor environment wet and dry bulb temperature, under the conditions of operating load, defrost cycle=M min, unit
Heating operation, indoor environment temperature P DEG C.When unit operation to N+1 week, identical outdoor environment wet and dry bulb temperature, fortune
Under row loading condiction, the defrost cycle of unit=(M-15) min, indoor environment temperature is only capable of reaching (P-5) DEG C, then shows outdoor
Heat exchanger is likely to occur dirty stifled situation；Meanwhile, now outdoor heat exchanger is dirty blocks up the operational effect having affected unit, so that shadow
Ring the heating effect of indoor.Wherein, indoor environment temperature P and (P-5) DEG C, by way of example only, actual indoor environment temperature
It is probably other values.
Thus, it is judged that heat exchanger dirty stifled after, can determine whether dirty stifled whether serious, and dirty stifled serious when determination
Clean, to promote the experience of the heat transfer effect of heat exchanger and user.
Alternatively, described cleaning unit 106, may include that and heat dirty stifled judge module 1062, or dirty stifled judgement of freezing
Module 1064.
In one example, dirty stifled judge module 1062, when may be used for described unit heating operation, described unit are heated
Indoor fan wind pushing temperature less than preset heat wind pushing temperature.
For example: in unit heating operation, machine wind pushing temperature is on the low side.
In one example, freeze dirty stifled judge module 1064, when may be used for described unit refrigerating operaton, described unit
Indoor fan wind pushing temperature higher than preset refrigeration wind pushing temperature.
For example: in unit refrigerating operaton, machine wind pushing temperature is higher.
Thus, by judging the wind pushing temperature of indoor fan when heating mode or refrigeration mode, it may be determined that heat exchanger
Dirty stifled serious conditions, and then determine whether to clean, on the one hand the judged result of the dirty stifled situation of heat exchanger is precisely, reliably, separately
On the one hand being easy to safeguard in time heat exchanger, Consumer's Experience is good.
The process being realized by the device of the present embodiment and function essentially correspond to the method shown in earlier figures 1 to Fig. 4
Embodiment, principle and example, therefore not detailed part in the description of the present embodiment, may refer to speaking on somebody's behalf mutually in previous embodiment
Bright, do not repeat at this.
Through substantial amounts of verification experimental verification, use technical scheme, the unit operation essential information of detection refrigeration system
(for example: unit operation essential information) and defrost cycle, the dirty stifled situation of reflection unit outdoor heat exchanger, and in time outdoor is changed
Hot device is carried out, thus improves the heat transfer effect of heat exchanger, and the difficulty that heat exchanger is safeguarded is little, also helps lifting
The experience of user.
According to embodiments of the invention, additionally provide a kind of air-conditioning corresponding to the dirty stifled judgment means for heat exchanger.
This air-conditioning may include that the described dirty stifled judgment means for heat exchanger.
For example: this air-conditioning, heat exchanger carries out the process of dirty stifled judgement, may include that
The first step: obtain the unit operation essential information of unit local environment.
GPRS module is installed on unit, with unit real-time communication.Unit location can be collected by GPRS module
The unit operation essential information on long date (for example: in preset duration) is (for example: temperature, humidity, wind direction wind-force, haze index
Deng), then these parameters are transferred to unit.
Wherein, these unit operation essential informations are essentially from two aspects: 1. provide from national authority meteorological department
Each department climate parameter, such as haze degree, PM2.5 value, weather condition etc.；2. the unit that unit self GPRS module is collected
Individual unit operation essential information, such as running environment wet and dry bulb temperature etc. during unit operation.
Second step: obtain the defrost cycle of unit, and the dirty stifled situation of comprehensive descision outdoor heat exchanger.
(1) unit enters defrost condition
The defrost cycle of unit is added up, normal heating operation during the adjacent defrost twice of defrost cycle i.e. unit
Time.
Unit defrost cycle control methods is: install the temperature-sensitive i.e. defrost temperature of bag at unit outdoor heat exchanger heat exchange pipe external surface
Degree temperature-sensitive bag, detects defrost temperature, when unit heating operation under dry, wet-bulb temperature environment outside given chamber, if defrost temperature
Degree is less than certain particular value, then unit enters defrost.
(2) the dirty stifled impact on the refrigeration system defrost cycle of outdoor heat exchanger
Example shown in Figure 7, when outdoor heat exchanger dirty stifled when, during heating operation, outdoor heat exchanger heat transfer effect
Can be deteriorated, being equivalent to refrigerant and the heat exchange thermal resistance of air in the external world in heat exchanger increases.At identical conditions (for example: outdoor
Wet and dry bulb temperature is identical), in outdoor heat exchanger, the evaporating temperature of refrigerant can reduce, thus causes defrost temperature to reduce, defrost temperature
Degree can quickly be down to defrost threshold value, and unit quickly enters defrost, i.e. the defrost cycle can shorten.
Example shown in Figure 8, the defrost cycle of unit and outdoor environment wet and dry bulb temperature, operating load, outdoor are changed
Hot device heat exchange is related to, for example: meet function TDefrost=F (tsur, α, β).Wherein, TDefrostRepresent the defrost cycle of unit, tsur table
Showing outdoor environment wet and dry bulb temperature, α represents operating load rate, β represent outdoor heat exchanger dirty stifled when heat exchange situation.
When identical condition (for example: outdoor environment wet and dry bulb temperature, operating load, heat exchanger heat exchange), the defrost cycle
Essentially identical.When heat exchanger occur dirty stifled when, heat exchanger heat transfer effect be deteriorated, heat exchanger evaporating temperature can reduce, and heat exchanger is more
It is easily accessible defrost, i.e. defrost cycle time.Wherein, identical condition (for example: outdoor environment wet and dry bulb temperature, operating load,
And defrost cycle TDefrost) contrast, can contrast in units of sky, week, the moon, year.
For example: N week, certain outdoor environment wet and dry bulb temperature, under the conditions of operating load, defrost cycle=M min.Work as machine
When group was run to N+1 week, under the conditions of identical outdoor environment wet and dry bulb temperature, operating load, the defrost cycle of unit=
(M-15) min, i.e. defrost cycle time 15min, shows that heat exchanger is likely to occur dirty stifled situation.Wherein, 15min only as a example by
Lift, the shortening time in actual defrost cycle, it may be possible to other values；N, M are natural number.
(3) the dirty stifled comprehensive descision of heat exchanger
1. heat exchanger is dirty stifled when judging, is based primarily upon two conditions.Wherein, main Rule of judgment is: defrost week
Phase changes；Auxiliary judgment condition is: the unit operation essential information change on machine group leader's date.
For example: combine the unit operation essential information change on machine group leader's date, and the change in unit defrost cycle, permissible
Judge the dirty stifled situation of unit outdoor heat exchanger.
When the unit operation essential information performance on machine group leader's date is: units' installation amblent air temperature haze is very serious, with
When unit defrost cycle time when, then can illustrate that unit outdoor heat exchanger occurs dirty stifled.
Because unit defrost cycle time, reason might not be that heat exchanger is dirty stifled entirely, may have other reasons.But machine
Group defrost cycle time, unit local climate parameter haze always, then unit defrost cycle time reason in this time simultaneously
Substantially can be determined that heat exchanger is dirty stifled.
If 2. interior for a long time, the unit defrost cycle constantly shortens, and when affecting unit heating effect (for example: unit system
Heat run in when machine wind pushing temperature is on the low side, machine wind pushing temperature is higher in refrigerating operaton), then point out unit outdoor heat exchanger dirty stifled non-
Chang Yanchong, needs periodically to be carried out.
For example: N week, certain outdoor environment wet and dry bulb temperature, under the conditions of operating load, defrost cycle=M min, unit
Heating operation, indoor environment temperature P DEG C.When unit operation to N+1 week, identical outdoor environment wet and dry bulb temperature, fortune
Under row loading condiction, the defrost cycle of unit=(M-15) min, indoor environment temperature is only capable of reaching (P-5) DEG C, then shows outdoor
Heat exchanger is likely to occur dirty stifled situation；Meanwhile, now outdoor heat exchanger is dirty blocks up the operational effect having affected unit, so that shadow
Ring the heating effect of indoor.Wherein, indoor environment temperature P and (P-5) DEG C, by way of example only, actual indoor environment temperature
It is probably other values.
The process being realized by the air-conditioning of the present embodiment and function essentially correspond to the device shown in earlier figures 5 and Fig. 6
Embodiment, principle and example, therefore not detailed part in the description of the present embodiment, may refer to speaking on somebody's behalf mutually in previous embodiment
Bright, do not repeat at this.
Through substantial amounts of verification experimental verification, use technical scheme, substantially believed by the unit operation to unit for the GPRS
The acquisition of breath, combine service data and be analyzed, when, in the long date, unit climatic environment is severe, simultaneously identical external parameter (example
As: unit operation essential information) under the conditions of, during unit defrost cycle time, then judge that refrigeration system outdoor heat exchanger is dirty stifled.
To sum up, skilled addressee readily understands that, on the premise of not conflicting, above-mentioned each advantageous manner can be certainly
By ground combination, superposition.
The foregoing is only embodiments of the invention, be not limited to the present invention, for those skilled in the art
For Yuan, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any modification of being made,
Equivalent, improvement etc., should be included within scope of the presently claimed invention.
Claims (15)
1. the dirty stifled determination methods for heat exchanger, it is characterised in that include:
Obtain the unit operation essential information of described heat exchanger place unit local environment, and obtain the defrost week of described unit
Phase；
In the first preset duration, preset unit operation essential information and describedization when described unit operation essential information meets
During frost cycle time, determine that described heat exchanger is dirty stifled.
2. method according to claim 1, it is characterised in that also include:
Determine described heat exchanger dirty stifled after, continue to obtain the described defrost cycle of described unit, and obtain described unit dirty stifled when
Heat information when heating mode；
In the second preset duration, when continue obtain the described defrost cycle constantly shorten and described heat information meet preset
When heating condition, determine and described heat exchanger is carried out.
3. method according to claim 2, it is characterised in that described heat information meet preset heat condition, comprising:
During described unit heating operation, the wind pushing temperature of the indoor fan of described unit heats wind pushing temperature less than presetting；Or,
During described unit refrigerating operaton, the wind pushing temperature of the indoor fan of described unit is higher than default refrigeration wind pushing temperature.
4. the method according to one of claim 1-3, it is characterised in that obtain described unit operation essential information, comprising:
Obtain the environment weather information based on weather forecast；Described environment weather information, comprising: temperature, humidity, wind direction, wind-force,
At least one haze index；
And/or,
The unit operation essential information being provided by communication module is provided；Described unit operation essential information, comprising: described unit is transported
The wet and dry bulb temperature of running environment during row, the operating load rate of unit, outdoor heat exchanger condition of work at least one.
5. the method according to one of claim 1-4, it is characterised in that obtain the defrost cycle of described unit, comprising:
Obtain the described unit time properly functioning during adjacent defrost twice；
According to the described time, determine the described defrost cycle.
6. method according to claim 5, it is characterised in that obtain described unit and normally transport during adjacent defrost twice
The time of row, comprising:
Obtain the defrost temperature being collected by the temperature-sensitive bag of heat exchanger heat-exchanging tube outer surface；
When described unit heating operation under identical described unit operation essential information, preset if described defrost temperature is less than
Defrost temperature, it is determined that unit enters defrost process；
Enter the time of described defrost process according to described unit, obtain described unit properly functioning during adjacent defrost twice
Time.
7. the method according to one of claim 1-6, it is characterised in that described defrost cycle, comprising: actual defrost cycle
With the target defrost cycle；
Correspondingly, determine that described heat exchanger is dirty stifled, comprising:
According to described unit operation essential information, determine the actual defrost cycle of described unit, and all with default target defrost
Phase contrasts；
It is less than described target defrost cycle and described target defrost cycle and described actual defrost week when the described actual defrost cycle
When the difference of phase is more than predetermined threshold value, determine that described heat exchanger is dirty stifled.
8. the dirty stifled judgment means for heat exchanger, it is characterised in that include:
Acquiring unit, is used for obtaining the unit operation essential information of described heat exchanger place unit local environment, and obtains described
The defrost cycle of unit；
Determining unit, in the first preset duration, when the satisfied default unit operation of described unit operation essential information is basic
When information and described defrost cycle time, determine that described heat exchanger is dirty stifled.
9. device according to claim 8, it is characterised in that also include:
Cleaning unit, be used for determining described heat exchanger dirty stifled after, continue to obtain the described defrost cycle of described unit, and obtain institute
State unit dirty stifled when heat information when heating mode；And,
For in the second preset duration, when the described defrost cycle continuing to obtain constantly shortens and the described information that heats meets
Preset when heating condition, determine and described heat exchanger is carried out.
10. device according to claim 9, it is characterised in that described cleaning unit, comprising:
Heating dirty stifled judge module, during for described unit heating operation, the wind pushing temperature of the indoor fan of described unit is less than
Preset and heat wind pushing temperature；Or,
Freeze dirty stifled judge module, and during for described unit refrigerating operaton, the wind pushing temperature of the indoor fan of described unit is higher than
Preset refrigeration wind pushing temperature.
11. one of-10 described devices according to Claim 8, it is characterised in that acquiring unit, comprising:
Weather forecast acquisition module, for obtaining the environment weather information based on weather forecast；Described environment weather information, bag
Include: temperature, humidity, wind direction, wind-force, haze index at least one；
And/or,
Operation information acquisition module, for obtaining the unit operation essential information being provided by communication module；Described unit operation base
This information, comprising: the wet and dry bulb temperature of running environment, the operating load rate of unit, outdoor heat exchanger work during described unit operation
Make condition at least one.
12. one of-11 described devices according to Claim 8, it is characterised in that acquiring unit, also include:
Defrost period determination module, for obtaining the described unit time properly functioning during adjacent defrost twice；And,
For according to the described time, determine the described defrost cycle.
13. devices according to claim 12, it is characterised in that defrost period determination module, comprising:
Temperature acquisition submodule, for obtaining the defrost temperature being collected by the temperature-sensitive bag of heat exchanger heat-exchanging tube outer surface；
Defrost determines submodule, is used for when described unit heating operation under identical described unit operation essential information, if
Described defrost temperature is less than default defrost temperature, it is determined that unit enters defrost process；
Time obtains submodule, for entering the time of described defrost process according to described unit, obtains described unit adjacent
Time properly functioning during defrost twice.
14. one of-13 described devices according to Claim 8, it is characterised in that described defrost cycle, comprising: actual defrost is all
Phase and target defrost cycle；
Correspondingly, determining unit, comprising:
Computing module, for according to described unit operation essential information, determines the actual defrost cycle of described unit, and with preset
The target defrost cycle contrast；It is less than described target defrost cycle and described target defrost cycle when the described actual defrost cycle
When being more than predetermined threshold value with the difference in described actual defrost cycle, determine that described heat exchanger is dirty stifled.
15. 1 kinds of air-conditionings, it is characterised in that include: the dirty stifled judgement for heat exchanger as described in claim 8-14 is arbitrary
Device.
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