CN110006133A - A kind of air-conditioner defrosting control method, device and air conditioner - Google Patents
A kind of air-conditioner defrosting control method, device and air conditioner Download PDFInfo
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- CN110006133A CN110006133A CN201910305286.7A CN201910305286A CN110006133A CN 110006133 A CN110006133 A CN 110006133A CN 201910305286 A CN201910305286 A CN 201910305286A CN 110006133 A CN110006133 A CN 110006133A
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- air
- temperature difference
- conditioner
- temperature
- air conditioner
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The present invention provides a kind of air-conditioner defrosting control method, device and air conditioner, air-conditioner defrosting control method includes obtaining air conditioner indoor coil pipe and outdoor coil temperature in real time；According to indoor coil pipe and outdoor coil temperature calculating temperature difference △ T；It defrosts when temperature difference △ T is greater than or equal to preset temperature difference threshold.During operation of air conditioner, if temperature difference △ T is persistently greater than or equal to temperature difference threshold, temperature difference threshold is updated to temperature difference △ T；When meeting exit criteria, control air conditioner exits defrosting.By the way that the indoor coil pipe after stable operation is compared with the difference of outdoor coil temperature with the temperature difference threshold of setting, accurately judge frosting situation, defrost is carried out when confirming that temperature difference △ T is greater than or equal to preset temperature difference threshold, realize accurate defrost, exit criteria is concurrently set, to guarantee that frost layer eliminates, it is ensured that defrosting completely avoids frequent defrost.
Description
Technical field
The present invention relates to air-conditioner defrosting technical field, in particular to a kind of air-conditioner defrosting control method, device and air conditioner.
Background technique
Air conditioner work is in low temperature or the higher operating condition of humidity, since air-conditioning evaporating temperature is steamed lower than water around outdoor unit
Gas dew-point temperature, thus on the outside of air-conditioning heat exchanger surface have condensed water generation, when its temperature reach zero degree and it is following when will
Frosting even freezes on the outside.And existing heat pump air conditioner has defrosting function, is exactly to switch to realize to refrigerating function by heating
Defrosting, i.e., by refrigerating operaton, outside heat exchanger radiates outward melts frost, to reach defrosting purpose.
Currently, air conditioner intelligent defrosting control model mainly by detection inner disc temperature/external disk temperature and defrosting time come
Reach defrosting purpose.But above-mentioned this air conditioner defrosting control method, since the temperature of indoor unit coil pipe is by extraneous temperature
The influence of degree is also larger, is easy to carry out accidentally defrosting using this judgment mode, it is also possible to cause defrosting incomplete.
Summary of the invention
Problems solved by the invention is: improving the problems such as existing defrosting control method defrosting is not accurate.
To solve the above problems, the present invention provides a kind of air-conditioner defrosting control method, the air-conditioner defrosting control method packet
It includes: after air conditioner is with heating mode stable operation, obtaining air conditioner indoor coil pipe and outdoor coil temperature in real time；According to
The indoor coil pipe and the outdoor coil temperature calculating temperature difference △ T；When the temperature difference △ T is greater than or equal to preset temperature
When poor threshold value, controls the air conditioner and defrost.By by the indoor coil pipe and outdoor coil temperature after stable operation
Difference be compared with the temperature difference threshold of setting, accurately judge frosting situation, when confirmation temperature difference △ T be greater than or equal to it is preset
Defrost is carried out when temperature difference threshold, realizes accurate defrost.
Further, the air-conditioner defrosting control method include: when the temperature difference △ T continue the first preset duration be greater than or
When equal to the temperature difference threshold, the temperature difference threshold is updated to the value of the temperature difference △ T.More according to the operating status of air conditioner
New temperature difference threshold can be adjusted the Rule of judgment for entering frosting for the operation conditions of air conditioner, realize accurate defrost.
Further, the air-conditioner defrosting control method further include: when temperature difference threshold update reaches the limit value of setting
When Δ Tmax, stop updating the temperature difference threshold.Limit value is set to temperature difference threshold, prevents the blocked up increase defrosting of air conditioner frosting difficult
Degree prevents the performance for influencing air conditioner.
Further, the range of the temperature difference threshold is 35~40 DEG C.
Further, the method also includes: when meeting the exit criteria of setting, control the air conditioner and exit and remove
Frost.
Further, the exit criteria includes: that the compressor operating time of the air conditioner reaches the second preset duration
More than, and the outdoor coil temperature continues third preset duration higher than the first preset temperature；Or the air conditioner operation removes
White mode duration reaches the 4th preset duration.By setting exit criteria to air conditioner, i.e. the exiting when meeting exit criteria
Frost, the setting of exit criteria may insure that air conditioner defrosts completely.
Further, if the air-conditioner defrosting control method includes: that the air conditioner operation defrosting mode reaches the 4th in advance
If after duration, the outdoor coil temperature is consistently less than the first preset temperature, then information warning is issued.When air conditioner is in defrosting mould
Formula operation does not exit defrost when reaching four preset durations yet, then illustrates air conditioner defrosting failure, issue information warning and remind use
Family.
Further, it is described when air conditioner with heating mode stable operation include: when the air conditioner start heating or change
When frost terminates to restore heating, compressor and inner blower continuous operation reach the 5th preset duration；Or the air conditioner is shut down up to temperature
When restoring heating afterwards, compressor continuous operation reaches the 6th preset duration.
The present invention also provides a kind of air-conditioner defrosting control device, the air-conditioner defrosting control device is for executing as above-mentioned
Air-conditioner defrosting control method, the air-conditioner defrosting control device includes:
Acquiring unit, for obtaining air conditioner indoor coil pipe in real time after air conditioner is with heating mode stable operation
And outdoor coil temperature；
Processing unit, for according to the indoor coil pipe and the outdoor coil temperature calculating temperature difference △ T；
Control unit, for when the temperature difference △ T be greater than or equal to preset temperature difference threshold when, control the air conditioner into
Row defrosting.
The present invention also provides a kind of air conditioner, the air conditioner includes controller, and the controller executes computer and refers to
It enables to realize above-mentioned air-conditioner defrosting control method.
Detailed description of the invention
Fig. 1 is the schematic diagram of air conditioner provided by the invention；
Fig. 2 is the flow chart of air-conditioner defrosting control method provided by the invention；
Fig. 3 is Suck and exhaust pressure trend chart during air conditioner heat-production runs and defrosts；
Fig. 4 is the functional unit schematic diagram of air-conditioner defrosting control device provided by the invention.
Description of symbols:
100- air conditioner；110- controller；200- air-conditioner defrosting control device；210- acquiring unit；220- processing unit；
230- control unit.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
The embodiment of the invention provides a kind of air conditioners 100, can precisely be removed while for adjusting room temperature
Frost avoids frequent defrost, prevents situations such as incomplete appearance that defrosts.Referring to Fig. 1, being air conditioner provided in an embodiment of the present invention
100 schematic diagram.The air conditioner 100 includes controller 110, and controller 110 can be with computer instructions to realize the present invention
The air-conditioner defrosting control method of offer.Air-conditioner defrosting control device includes that at least one can be stored in the form of software or firmware
Software function module in controller 110, for example, can be with direct burning in the memory space of controller 110, another real
It applies in mode, may be stored in other independent storage mediums, executed by controller 110.
Controller 110 may be a kind of IC chip, the processing capacity with signal.Above-mentioned controller 110 can
To be general processor, including central processing unit (Central Processing Unit, abbreviation CPU), digital signal processor
(DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate
Perhaps transistor logic, discrete hardware components may be implemented or execute disclosed each method in the embodiment of the present invention,
Step and logic diagram.General processor can be microprocessor.Controller 110 is also possible to any conventional processor etc..
It is to be appreciated that structure shown in FIG. 1 is only to illustrate, air conditioner 100 may also include it is more than shown in Fig. 1 or
Less component, or with the configuration different from shown in Fig. 1.Each component shown in Fig. 1 can using hardware, software or its
Combination is realized.
Referring to Fig. 2, Fig. 2 shows air-conditioner defrosting control methods provided in this embodiment.Air-conditioning provided in this embodiment
Defrosting control method includes S1~S6.
S1 obtains air conditioner indoor coil pipe and outdoor coil pipe used after air conditioner is with heating mode stable operation in real time
Temperature.
The air conditioner season that ambient temperature is low in winter or humidity is high, since air-conditioning evaporating temperature is lower than room
Vapor dew-point temperature around outer machine, therefore heat exchanger surface has condensed water generation on the outside of air-conditioning, when its temperature reaches zero degree
And it frosting will even freeze on the outside when following.For the frosting situation of real-time monitoring outdoor unit of the air conditioner, to air conditioner with
After heating mode stable operation, air conditioner indoor coil pipe and outdoor coil temperature are obtained in real time.
Air conditioner is referred to heating mode stable operation: when air conditioner starts heating or defrost terminates to restore heating, pressure
Contracting machine and inner blower continuous operation reach the 5th preset duration, for example, the 5th preset duration can be 10 minutes.
Or restore to heat after temperature is shut down when air conditioner reaches (heating out of service after air-conditioner set is run to set temperature,
Meet entry condition after room temperature decline and can restore heating operation again) when, compressor continuous operation reach the 6th it is default when
Length, such as the 6th preset duration can be 4 minutes~6 minutes etc..
Due to tentatively starting the early period of heating in air conditioner, the operation conditions such as compressor, indoor fan are unstable, to interior
Being affected for coil temperature and outdoor coil temperature, therefore, obtains indoor coil pipe after air conditioner stable operation just now
And outdoor coil temperature.
In this present embodiment, air-conditioning internal machine, outdoor machine of air-conditioner are provided with temperature sensor, when air conditioner is steady in heating mode
After fixed operation, temperature sensor obtains indoor coil pipe and outdoor coil temperature in real time, and the indoor coil pipe that will acquire
And outdoor coil temperature is sent to controller to be handled.
S2, according to indoor coil pipe and outdoor coil temperature calculating temperature difference △ T.
It is to be appreciated that air conditioner work indoor coil pipe in heating mode is higher than outdoor coil temperature, meter is indoor
Coil temperature is Tem, and meter outdoor coil temperature is Tdef, then temperature difference △ T meets following formula: △ T=Tem-Tdef.For example,
Under standard heating condition (20 DEG C of indoor dry-bulb temperature, 15 DEG C of indoor wet-bulb temperatures, 7 DEG C of outdoor dry-bulb temperature, outdoor wet bulb temperature
Degree 6 DEG C) air-conditioner set stable operation when, acquire Tem=35 DEG C of indoor coil pipe of acquisition, outdoor coil temperature Tdef=
3.0, then temperature difference △ T=Tem-Tdef=32 can be calculated according to the indoor coil pipe of acquisition and outdoor coil temperature
℃。
S3, determines whether the temperature difference △ T being calculated is greater than or equal to the temperature difference threshold of setting.
In this present embodiment, presetting to have temperature difference threshold, temperature difference threshold is that indoor coil pipe and outdoor coil temperature are poor
The maximum value of value, it is possible to understand that ground, after air conditioner stable operation, room temperature is in stable range, and fluctuation is smaller,
I other words indoor coil pipe Tem is in a stable range, and after air conditioner stable operation, the variation master of temperature difference △ T
It to be determined by the variation tendency of outdoor coil temperature Tdef, coil temperature Tem is fluctuated in lesser situation indoors, outdoor coil pipe used
Temperature decline, then temperature difference △ T increases；If outdoor coil temperature rises, temperature difference △ T reduces.
It is to be appreciated that outdoor coil temperature is influenced by outdoor environment temperature, fluctuation is relatively large, when outside air conditioner chamber
When machine frosting, outdoor coil temperature can be drastically reduced, and with the deterioration of frosting degree, outdoor coil temperature decrease speed is increasingly
Fastly, when frosting is thicker, the heating performance of air conditioner is reduced, and influences the experience of user, and therefore, it is necessary to carry out before frosting deteriorates
Defrosting avoids the performance for influencing air conditioner.
Temperature difference threshold is the indoor coil pipe of setting and the maximum value of outdoor coil temperature difference, to characterize air conditioner
Frosting situation, temperature difference threshold are set according to the performance of air conditioner, for example, fiducial temperature threshold value is 35 DEG C.When temperature difference △ T is big
In or be equal to temperature difference threshold when, illustrate that outdoor coil temperature has already decreased to a reduced levels, frosting degree is thicker, need into
Row defrost illustrates outdoor air-conditioner outdoor unit frosting lesser extent or also non-frosting, nothing if temperature difference △ T is less than temperature difference threshold
It must carry out defrost.For example, when air-conditioner set operates in the environment of easy frosting (such as indoor 20 DEG C of dry-bulb temperature, it is indoor wet
15 DEG C of ball temperature, 2 DEG C of outdoor dry-bulb temperature, 1 DEG C of outdoor wet-bulb temperature), acquisition obtains Tem=34.2 DEG C of indoor coil pipe,
Outdoor coil temperature Tdef=-3.0, then temperature difference △ T=Tem-Tdef=37.2 DEG C, temperature difference △ T is greater than preset at this time
Temperature difference threshold illustrates that air-conditioner outdoor unit starts periodical frosting.
In order to make it easy to understand, referring to Fig. 3, Fig. 3 shows Suck and exhaust pressure during air conditioner heat-production operation and defrosting
Trend chart.Top curve is pressure of inspiration(Pi) curve in figure, and lower curve is pressure at expulsion curve.Wherein, pressure of inspiration(Pi) can
Approximatively to characterize the variation tendency of indoor coil pipe, the variation that pressure at expulsion can approximatively characterize outdoor coil temperature becomes
Gesture.When air conditioner work is in heating mode, heating is operated normally to after set temperature, indoor coil pipe and outdoor coil pipe used
Temperature within a certain period of time can held stationary, that is, Tem and Tdef be held essentially constant, but start frosting indoor coil when outdoor unit
Temperature and outdoor coil temperature by being declined in various degree, when the two can be in the presence of a maximum difference to a certain extent for frosting
△ Tmax can correspond to different range according to the thickness △ Tmax of frosting, so this parameter can be used as the entry condition of defrosting, in
In the present embodiment, the range of Δ Tmax is set as 35~40 DEG C.But not limited to this, can also according to the heating performance of air conditioner and
Use environment carries out adaptive settings.
If temperature difference △ T is greater than or equal to the temperature difference threshold of setting, defrost is carried out, executes S4.If temperature difference △ T is lower than setting
Temperature difference threshold, then persistently detected.
S4, control air conditioner defrost.
There are two types of the mode of air conditioner defrosting is general, one is shutting down to defrost, frost layer is allowed voluntarily to melt, this mode is in temperature
It is infeasible when spending lower, and the time for melting frost is longer, another kind is heating and defrosting, that is, changes the operating mode of air conditioner, benefit
It is heated with compressor and achievees the effect that defrosting, in this present embodiment, air conditioner defrosting can use heating and defrosting, above-mentioned
Defrost mode just for the sake of introduce explanation, not limitation of the present invention, the present embodiment are not construed as limiting the mode of defrosting.
In this present embodiment, while control air conditioner is defrosted, air-conditioner defrosting control method further includes updating temperature
The step of poor threshold value.
S41: when temperature difference △ T continues the first preset duration more than or equal to temperature difference threshold, temperature difference threshold is updated to temperature
The value of poor △ T.
If the temperature difference △ T being calculated continues the first preset duration more than or equal to temperature difference threshold, more by temperature difference threshold
New is the value of temperature difference △ T.It is to be appreciated that if the temperature difference △ T being calculated continues the first preset duration more than or equal to the temperature difference
Threshold value illustrates the frosting lesser extent that temperature difference threshold is characterized, carries out defrost at this time, may cause frequent defrost, therefore will be warm
The value of poor threshold value is updated to the value of temperature difference △ T, after this defrosting, when frosting starts next time, then can suitably delay
The defrost time reduces the frequency of defrost, realizes accurate defrost.
First preset duration can be set to 10 seconds, but not limited to this, it can also be other time spans, such as 8~
15 seconds etc..
In this present embodiment, the range of temperature difference threshold is set as 35~40 DEG C, and sets the initial value of temperature difference threshold as 35
DEG C, when temperature difference threshold update reaches the limit Δ Tmax of setting, limit Δ Tmax characterizes the critical value of air conditioner frosting degree,
Such as 40 DEG C, when temperature difference T reaches 40 DEG C, show that air conditioner frosting Chengdu is more serious, it is necessary to defrost is carried out at once, it can
To understand ground, when temperature difference threshold update reaches the limit Δ Tmax of setting, stops updating temperature difference threshold, frosting degree is avoided to dislike
Changing influences household air-conditioner.
After air conditioner runs defrost pattern or defrosting mode, indoor coil pipe and outdoor coil temperature are persistently detected,
It is confirmed whether to meet the exit criteria of setting.
S5, when meeting the exit criteria of setting, control air conditioner exits defrosting.
In this present embodiment, there are two exit criterias for setting, when operation defrosting mode or the air conditioner of defrost pattern meet
Wherein when any one exit criteria, that is, exit defrosting.
Exit criteria includes:
The compressor operating time of air conditioner reaches the second preset duration or more, and outdoor coil temperature continues third and presets
Duration is higher than the first preset temperature.
Wherein, compressor operating time reaches the second preset duration to ensure to defrost and complete, and the second preset duration can be set
It is set to 1 minute, but not limited to this, it can also be longer time span, run more than second in advance using compressor in air conditioner
If duration heating carries out defrost, it is possible to understand that ground, frost layer are reduced, and outdoor coil temperature increases, when outdoor coil temperature continues the
When three preset durations are higher than the first preset temperature, air conditioner can be confirmed, frost layer eliminates defrosting and completes.Third preset duration can be with
It being set as 3~5 seconds, the first preset temperature can be set to 12 DEG C, but not limited to this, it can also be according to the working environment of air conditioner
Carry out the adjustment of adaptability.
Exit criteria further include: air conditioner operation defrosting mode duration reaches the 4th preset duration.It is to be appreciated that for
For air conditioner, the defrosting efficiency of defrosting mode be it is determining, in this present embodiment, set the 4th preset duration, the 4th is pre-
If duration include regular hour redundancy with ensure to defrost completely, when the operation of the defrosting mode of air conditioner reach the 4th it is default when
When long, defrosting mode is exited.4th preset duration can be set according to the defrosting efficiency of air conditioner, for example, it may be in advance
What is be first arranged starts the time required for defrosting mode defrosts completely along with certain after air conditioner frosting reaches certain thickness
The time redundancy amount of length.So as to ensure under normal circumstances, after defrosting mode runs the 4th preset duration, air conditioner is equal
It can defrost completely, in this present embodiment, the 4th preset duration can be set as 12 minutes, but not limited to this, it can also be according to sky
The performance and working environment for adjusting device are set, are adjusted.
S6, if it is pre- that outdoor coil temperature is consistently less than first after air conditioner operation defrosting mode reaches the 4th preset duration
If temperature then issues information warning.
It is to be appreciated that for ordinary circumstance, after air conditioner reaches four preset durations with defrosting mode operation, air-conditioning
Device can defrost completely, and outdoor coil temperature rising reaches normal level, such as reaches the first preset temperature or more, and first is default
Temperature can be set to 12 DEG C.
If outdoor coil temperature is consistently less than the first default temperature after air conditioner operation defrosting mode reaches the 4th preset duration
Degree, then illustrate that the defrosting mode of air conditioner does not reach due defrosting effect, the defrosting disabler of air conditioner or air conditioner
Frosting degree severe exacerbation, not up to due defrosting effect, air conditioner generates and issues information warning at this time.
For example, air conditioner includes display or display board, then it can control display or display board show information warning,
In the other embodiments of the present embodiment, information warning can also be sent to the intelligent terminal of user by air conditioner by server
(e.g., smart phone) etc. is shown, to remind user to verify the operating status of air conditioner, air conditioner is avoided to damage.
In order to execute the corresponding steps in above-described embodiment and each possible embodiment, a kind of air-conditioning is given below and removes
The implementation of white control device 200, referring to Fig. 4, Fig. 4 is a kind of air-conditioner defrosting control that present pre-ferred embodiments provide
Device 200.It should be noted that the skill of air-conditioner defrosting control device 200 provided by the present embodiment, basic principle and generation
Art effect and air-conditioner defrosting control method provided by the above embodiment are essentially identical, and to briefly describe, the present embodiment part is not mentioned
And place, it can refer to corresponding contents in the above embodiments.
Air-conditioner defrosting control device 200 includes: acquiring unit 210, processing unit 220 and control unit 230.
Acquiring unit 210, for being obtained in air conditioner Room 100 after air conditioner 100 is with heating mode stable operation in real time
Coil temperature and outdoor coil temperature.In this present embodiment, air-conditioning internal machine, outdoor machine of air-conditioner are provided with temperature sensor, work as sky
Adjust device 100 after heating mode stable operation, temperature sensor obtains indoor coil pipe and outdoor coil temperature in real time, and will
The indoor coil pipe and outdoor coil temperature of acquisition are sent to controller 110 to be handled.
It is to be appreciated that in a preferred embodiment, acquiring unit 210 can be used for executing S1.
Processing unit states indoor coil pipe and outdoor coil temperature calculating temperature difference △ T for basis.When air conditioner 100
Work is in heating mode, it is possible to understand that and ground, indoor coil pipe are higher than outdoor coil temperature, and meter indoor coil pipe is Tem,
Meter outdoor coil temperature is Tdef, then temperature difference △ T meets following formula: △ T=Tem-Tdef, according to indoor coil pipe and room
Temperature difference △ T can be calculated in outer coil temperature.
Presetting in this present embodiment to have temperature difference threshold, temperature difference threshold is indoor coil pipe and outdoor coil temperature difference
Maximum value, to characterize the frosting situation of air conditioner 100, it is possible to understand that ground, after 100 stable operation of air conditioner, room temperature
In stable range, fluctuation is smaller, and in other words, indoor coil pipe Tem is in a stable range, in air-conditioning
After 100 stable operation of device, the variation of temperature difference △ T is mainly determined by the variation tendency of outdoor coil temperature Tdef, indoors coil pipe
Temperature Tem is fluctuated in lesser situation, and outdoor coil temperature decline, then temperature difference △ T increases；If outdoor coil temperature rises,
Temperature difference △ T reduces.
If temperature difference △ T is greater than or equal to the temperature difference threshold of setting, defrost is carried out.If temperature difference △ T is lower than the temperature difference of setting
Threshold value is then persistently detected.
It is to be appreciated that in a preferred embodiment, processing unit can be used for executing S2~S3.
Control unit, for when temperature difference △ T is greater than or equal to preset temperature difference threshold, control air conditioner 100 to be removed
Frost.
When temperature difference △ T is greater than or equal to preset temperature difference threshold, air conditioner 100 meets defrosting condition, and control is empty at this time
Device 100 is adjusted to start defrosting mode or defrost pattern progress defrost.
It is to be appreciated that in a preferred embodiment, control unit can be used for executing S4.
It should be noted that if when the temperature difference △ T being calculated continues the first preset duration more than or equal to temperature difference threshold,
Processing unit is also used to for temperature difference threshold being updated to the value of temperature difference △ T.It is to be appreciated that if the temperature difference △ T being calculated continues
First preset duration is greater than or equal to temperature difference threshold, illustrates the frosting lesser extent that temperature difference threshold is characterized, carries out defrost at this time,
It may cause frequent defrost, therefore the value of temperature difference threshold be updated to the value of temperature difference △ T, after this defrosting, next time
When frosting starts, then the defrost time can be suitably delayed, the frequency of defrost is reduced, realizes accurate defrost.
It is to be appreciated that in a preferred embodiment, processing unit is also used to execute S41.
Control unit, which is also used to control air conditioner 100 when air conditioner 100 meets exit criteria, exits defrosting.Work as air conditioner
When the exit criteria of 100 satisfaction settings, control air conditioner 100 exits defrosting.In this present embodiment, there are two exit item for setting
Part exits defrosting when the air conditioner 100 for running defrosting mode or defrost pattern meets wherein any one exit criteria.
Exit criteria includes: that the compressor operating time of air conditioner 100 reaches the second preset duration or more, and outdoor coil temperature continues
Third preset duration is higher than the first preset temperature；Alternatively, air conditioner 100, which runs defrosting mode duration, reaches the 4th preset duration.
It is to be appreciated that in a preferred embodiment, control unit is also used to execute S5.
Control unit is also used to after air conditioner 100 runs defrosting mode and reaches four preset durations, outdoor coil temperature
It is consistently less than the first preset temperature, then issues information warning.It is to be appreciated that for ordinary circumstance, when air conditioner 100 is to defrost
After mode operation reaches the 4th preset duration, air conditioner 100 can defrost completely, and outdoor coil temperature rising reaches normal water
It is flat, such as reach the first preset temperature or more, the first preset temperature can be set to 12 DEG C.If the operation defrosting mould of air conditioner 100
Outdoor coil temperature is consistently less than the first preset temperature after formula reaches the 4th preset duration, then illustrates the defrosting mould of air conditioner 100
Formula does not reach due defrosting effect, the 100 frosting degree severe exacerbation of defrosting disabler or air conditioner of air conditioner 100,
Not up to due defrosting effect, air conditioner 100 generates and issues information warning at this time.
It is to be appreciated that in a preferred embodiment, control unit is also used to execute S6.
In conclusion the present invention provides a kind of air-conditioner defrosting control method, device and air conditioner, air-conditioner defrosting controlling party
Method includes, and after air conditioner is with heating mode stable operation, obtains air conditioner indoor coil pipe and outdoor coil temperature in real time；
According to indoor coil pipe and outdoor coil temperature calculating temperature difference △ T；When temperature difference △ T is greater than or equal to preset temperature difference threshold
When, control air conditioner defrosts.During operation of air conditioner, if temperature difference △ T continues the first preset duration and is greater than or equal to temperature
When poor threshold value, temperature difference threshold is updated to the value of temperature difference △ T.When meeting the exit criteria of setting, control air conditioner, which exits, to be removed
Frost.By the way that the temperature difference threshold of the difference of indoor coil pipe and outdoor coil temperature after stable operation and setting is compared
Compared with accurately judging frosting situation, carry out defrost when confirming that temperature difference △ T is greater than or equal to preset temperature difference threshold, realize accurate
Defrost has concurrently set exit criteria, to guarantee that frost layer eliminates, it is ensured that defrosting completely avoids frequent defrost.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of air-conditioner defrosting control method, which is characterized in that the air-conditioner defrosting control method includes:
After air conditioner (100) is with heating mode stable operation, air conditioner (100) indoor coil pipe and outdoor disk are obtained in real time
Tube temperature degree；
According to the indoor coil pipe and the outdoor coil temperature calculating temperature difference △ T；
When the temperature difference △ T is greater than or equal to preset temperature difference threshold, controls the air conditioner (100) and defrost.
2. air-conditioner defrosting control method according to claim 1, which is characterized in that the air-conditioner defrosting control method packet
It includes:
When the temperature difference △ T continues the first preset duration more than or equal to the temperature difference threshold, the temperature difference threshold is updated
For the value of the temperature difference △ T.
3. air-conditioner defrosting control method according to claim 2, which is characterized in that the air-conditioner defrosting control method is also wrapped
It includes:
When temperature difference threshold update reaches the limit Δ Tmax of setting, stop updating the temperature difference threshold.
4. air-conditioner defrosting control method according to claim 3, which is characterized in that the range of the temperature difference threshold Δ T is
35~40 DEG C.
5. air-conditioner defrosting control method according to claim 1, which is characterized in that the method also includes:
When meeting the exit criteria of setting, controls the air conditioner (100) and exit defrosting.
6. air-conditioner defrosting control method according to claim 5, which is characterized in that the exit criteria includes:
The compressor operating time of the air conditioner (100) reaches the second preset duration or more, and the outdoor coil temperature is held
Continuous third preset duration is higher than the first preset temperature；
Or air conditioner (100) the operation defrosting mode duration reaches the 4th preset duration.
7. air-conditioner defrosting control method according to claim 1, which is characterized in that the air-conditioner defrosting control method packet
It includes:
If the outdoor coil temperature is consistently less than after air conditioner (100) the operation defrosting mode reaches the 4th preset duration
First preset temperature, then issue information warning.
8. air-conditioner defrosting control method according to claim 1, which is characterized in that described when air conditioner (100) are to heat
Mode stable is run
When the air conditioner (100) start heating or defrost terminates to restore heating, compressor and inner blower continuous operation reach
5th preset duration；
Or the air conditioner (100) is up to when recovery heating, compressor continuous operation reaches the 6th preset duration after temperature shutdown.
9. a kind of air-conditioner defrosting control device, which is characterized in that the air-conditioner defrosting control device (200) is for executing such as right
It is required that air-conditioner defrosting control method described in 1~8 any one, the air-conditioner defrosting control device (200) include:
Acquiring unit (210), for obtaining air conditioner (100) room in real time after air conditioner (100) is with heating mode stable operation
Inner coil pipe temperature and outdoor coil temperature；
Processing unit (220), for according to the indoor coil pipe and the outdoor coil temperature calculating temperature difference △ T；
Control unit (230), for controlling the air conditioner when the temperature difference △ T is greater than or equal to preset temperature difference threshold
(100) it defrosts.
10. a kind of air conditioner, which is characterized in that the air conditioner (100) includes controller (110), and the controller (110) is held
Row computer instruction is to realize the air-conditioner defrosting control method as described in claim 1~8 any one.
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| CN110469966A (en) * | 2019-07-24 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110686356A (en) * | 2019-09-23 | 2020-01-14 | 珠海格力电器股份有限公司 | Control method for preventing frequent shutdown of air conditioner, computer readable storage medium and air conditioner |
| CN111425990A (en) * | 2020-03-04 | 2020-07-17 | 青岛海尔空调电子有限公司 | Defrosting control method of multi-split air conditioning system |
| CN113074440A (en) * | 2021-05-08 | 2021-07-06 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device and air conditioner |
| CN113587368A (en) * | 2021-07-21 | 2021-11-02 | 珠海格力电器股份有限公司 | Cleaning method, device and equipment of air conditioner and storage medium |
| CN114151927A (en) * | 2021-11-26 | 2022-03-08 | 宁波奥克斯电气股份有限公司 | Anti-frosting control method and device and air conditioner |
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| CN114719398A (en) * | 2022-04-01 | 2022-07-08 | 北京小米移动软件有限公司 | Defrosting device, heating apparatus, automatic defrosting control method, and storage medium |
| CN115493251A (en) * | 2022-11-01 | 2022-12-20 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, air conditioner and storage medium |
| CN115751667A (en) * | 2022-08-25 | 2023-03-07 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device, air conditioner and computer readable storage medium |
| CN116907140A (en) * | 2023-07-28 | 2023-10-20 | 北京工业大学 | Heat pump defrosting starting control method based on automatic temperature difference adjustment of outdoor temperature |
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| CN114151927B (en) * | 2021-11-26 | 2023-02-10 | 宁波奥克斯电气股份有限公司 | Anti-frosting control method and device and air conditioner |
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| CN115751667A (en) * | 2022-08-25 | 2023-03-07 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device, air conditioner and computer readable storage medium |
| CN115493251A (en) * | 2022-11-01 | 2022-12-20 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, air conditioner and storage medium |
| CN116907140A (en) * | 2023-07-28 | 2023-10-20 | 北京工业大学 | Heat pump defrosting starting control method based on automatic temperature difference adjustment of outdoor temperature |
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