CN108361917A - Air conditioner defrosting control method - Google Patents
Air conditioner defrosting control method Download PDFInfo
- Publication number
- CN108361917A CN108361917A CN201810152018.1A CN201810152018A CN108361917A CN 108361917 A CN108361917 A CN 108361917A CN 201810152018 A CN201810152018 A CN 201810152018A CN 108361917 A CN108361917 A CN 108361917A
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- CN
- China
- Prior art keywords
- air conditioner
- current value
- defrosting
- control method
- outdoor fan
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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 invention belongs to air conditioner technical fields, and in particular to a kind of air conditioner defrosting control method.In order to more accurately judge that the opportunity into defrosting, defrosting control method proposed by the present invention include：In the case of air conditioner is in heating condition, the real-time current value of outdoor fan and the temperature of indoor coil are detected；Compare the real-time current value of outdoor fan and selected standard current value；Based on the temperature of the indoor coil, judged whether that air conditioner is made to enter defrosting mode according to comparison result；Wherein, the standard current value is the current value of the outdoor fan that is measured in the state of outdoor unit non-frosting under different rotating speeds.The present invention can more accurately reflect outdoor coil pipe used frosting degree, to more accurately select defrosting opportunity, and effectively eliminate and limitation when frosting degree is judged using outdoor coil temperature in the prior art, the defrosting number of air conditioner is reduced, user experience is promoted.
Description
Technical field
The invention belongs to air conditioner technical fields, and in particular to a kind of air conditioner defrosting control method.
Background technology
Air conditioner as a kind of equipment that can adjust indoor environment temperature, its working principle is that：It is being followed by refrigerant
Between endless tube road by the state of high voltage/low voltage/gaseous state/liquid convert make indoor environment temperature reduce or increase, i.e., from
From the perspective of indoor unit, air conditioner is in refrigeration or heating condition.When air conditioner heat-production is run, in certain humidity item
If outdoor coil temperature is too low to lead to frosting situation under part, and outdoor coil pipe used frosting can cause the heat exchange of outdoor heat exchanger to be imitated
Rate reduces, and influences the heating effect of air conditioner, reduces the comfort of indoor environment, influence user experience.Therefore, at air conditioner
In the case of heating condition, the outdoor coil pipe used progress to air conditioner is needed effectively to defrost in time.
Existing technical solution is typically that the degree of outdoor coil pipe used frosting is judged by humidity and outdoor coil temperature, then
It is operated according to corresponding defrosting is carried out the case where outdoor coil pipe used frosting.But it is this judge frosting mode require it is outdoor coil pipe used
The accuracy of sensor is very high, and just more accurate well in outdoor heat exchanger shunting, once outdoor heat exchanger
Shunt it is bad, outdoor coil pipe used sensor be then unable to judge accurately the roads Chu Mei shunting evaporating temperature (outdoor coil pipe used sensor is only
It may determine that the evaporating temperature shunted all the way).In this case, it is easy to happen following scenario described：It is outdoor coil pipe used actually
There is the case where frosting, but outdoor coil pipe used temperature is higher, to can not accurately control defrosting, causes to have frost not
Change or the sordid situation of defrost.In consideration of it, suitable defrosting opportunity is selected to seem most important.
Therefore, the present invention proposes a kind of new defrosting control method.
Invention content
In order to solve the above problem in the prior art, in order to more accurately judge the opportunity into defrosting, the present invention
Propose a kind of air conditioner defrosting control method.The defrosting control method includes the following steps：It is in heating condition in air conditioner
In the case of, detect the real-time current value of outdoor fan and the temperature of indoor coil；Compare the real-time current value of outdoor fan with
Selected standard current value；Based on the temperature of the indoor coil, judged whether that air conditioner is made to enter defrosting according to comparison result
Pattern；Wherein, the standard current value is the outdoor fan that is measured in the state of outdoor unit non-frosting under different rotating speeds
Current value.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the selected standard current value is the room
Standard current value of the outer wind turbine under current rotating speed.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " compare the real-time current value of outdoor fan with
The step of selected standard current value " includes：Calculate the real-time current value of the outdoor fan and selected standard current value
Ratio.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " temperature based on the indoor coil, according to
Comparison result judges whether that air conditioner is made to enter defrosting mode " the step of include：It is set if the temperature of the indoor coil is less than
Fixed temperature threshold, and the ratio of the real-time current value of the outdoor fan and selected standard current value is less than first and presets
Value, then make the air conditioner enter defrosting mode；Otherwise, so that the air conditioner is maintained current heating condition, do not enter defrosting mould
Formula.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the Defrost method further includes：In the sky
It adjusts device to enter after defrosting mode, increases the throttle valve opening of air conditioner, after setting time, if the indoor coil
Temperature still less than the temperature threshold of setting, and the ratio of the real-time current value of the outdoor fan and selected standard current value
Still less than the first preset value, then increase the running frequency of compressor.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, first preset value be 0.85-0.95 it
Between arbitrary value；And/or the setting time is the random time value between 4-6 minutes；And/or it is described " to increase
The throttle valve opening of air conditioner " is specially：By the step number of throttle valve opening increase setting；And/or it is described " to increase compressor
Running frequency " be specially：The running frequency of compressor is increased to original setting multiple.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the defrosting control method, which further includes judgement, is
No the step of exiting defrosting mode, the step include：After the air conditioner enters defrosting mode, compare the reality of indoor fan
When current value and selected standard current value；Judged whether that air conditioner is made to exit defrosting mode according to comparison result.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " the air conditioner enter defrosting mode it
Afterwards, compare the real-time current value of indoor fan and selected standard current value " the step of include：Calculate working as the outdoor fan
The ratio of preceding current value and selected standard current value.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " judged whether to make air-conditioning according to comparison result
Device exits defrosting mode " the step of include：If the ratio of the real-time current value of the outdoor fan and selected standard current value
Value is more than or equal to the second preset value, then exits defrosting mode；Otherwise, the air conditioner is made to maintain defrosting operating condition.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, second preset value is between 0.95-1
Arbitrary value.
In the inventive solutions, while according to the electric current of the temperature of indoor coil and outdoor fan with outdoor disk
The variation of the frosting degree of pipe and changed rule judge outdoor coil pipe used frosting degree.Due to the electric current of outdoor fan
Corresponding variation can occur with outdoor coil pipe used frosting degree for size, and selected standard current value is in the non-frosting of outdoor unit
The current value of the outdoor fan measured under state, can by comparing the real-time current value and selected standard current value of outdoor fan
Accurately to reflect the situation of change of the size of current of outdoor fan, while further according to the temperature of indoor coil relative to setting
The variation of temperature threshold can more accurately reflect outdoor coil pipe used frosting degree, to more accurately select defrosting opportunity, and
It effectively eliminates and limitation when frosting degree is judged using outdoor coil temperature in the prior art, reduce the defrosting of air conditioner
Number promotes user experience.
Description of the drawings
Fig. 1 is the broad flow diagram of the air conditioner defrosting control method of the present invention；
Fig. 2 is the detail flowchart of the air conditioner defrosting control method of the present invention.
Specific implementation mode
To keep the embodiment of the present invention, technical solution and advantage more obvious, below in conjunction with attached drawing to the skill of the present invention
Art scheme is clearly and completely described, it is clear that and the embodiment described is a part of the embodiment of the present invention, rather than all
Embodiment.It will be apparent to a skilled person that these embodiments are used only for explaining the technical principle of the present invention, and
It is not intended to be limiting protection scope of the present invention.For example, although the method for the present invention is described in the application according to particular order
Each step, but these are not sequentially restrictive, under the premise of without departing from the basic principle of the present invention, this field skill
Art personnel can execute the step in a different order.
The prior art mainly judges outdoor coil pipe used frosting degree by outdoor coil temperature, but such as background technology
Described, this mode is easy to be influenced by factors such as shunting and sensor accuracies so that is sentenced using outdoor coil temperature
With certain limitation when disconnected frosting degree.Air conditioner defrosting control method proposed by the present invention is intended to eliminate using outdoor disk
Tube temperature degree judges limitation when frosting degree, and more accurately judges the opportunity for entering defrosting.
Referring to Fig.1, Fig. 1 is the broad flow diagram of the air conditioner defrosting control method of the present invention.As shown in Figure 1, of the invention
Defrosting control method include the following steps：S110, in the case of air conditioner is in heating condition, detect the reality of outdoor fan
When current value and indoor coil temperature；S120, the real-time current value for comparing outdoor fan and selected standard current value；
S130, the temperature based on indoor coil judge whether that air conditioner is made to enter defrosting mode according to comparison result；Wherein, standard electric
Flow valuve is the current value of the outdoor fan that is measured in the state of outdoor unit non-frosting under different rotating speeds.
As outdoor coil pipe used frosting degree is increasing, windage is caused to gradually increase, into the air quantity meeting of outdoor fan
It correspondingly reduces, when windage increases, the load of outdoor fan correspondingly increases, and the electric current of outdoor fan reduces therewith.Change speech
It, load of the outdoor fan under certain rotating speed is to determine, if the load of motor increases under same rotational speed, electric current reduces,
Then illustrate that the intake of outdoor fan reduces, outdoor coil pipe used frosting degree increases.It can be seen that the size of current of outdoor fan
Corresponding variation can occur with outdoor coil pipe used frosting degree.Therefore, the temperature based on indoor coil, recycles outdoor fan
Electric current is with the variation of outdoor coil pipe used frosting degree and changed rule judges outdoor coil pipe used frosting degree, Neng Gouyou
Effect ground is eliminated individually judges limitation when frosting degree using outdoor coil temperature/indoor coil pipe in the prior art.
To more accurately judge that air conditioner enters the opportunity of defrosting.
In the defrosting control method of above-mentioned air conditioner, when the temperature of indoor coil is less than the temperature threshold (ability of setting
Field technique personnel can be according to the suitable temperature threshold of actual use scene settings of air conditioner) when, then by the reality of outdoor fan
When current value be compared with selected standard current value, can directly judge outdoor coil pipe used frosting degree, it is possible thereby to
Accurately judge that air conditioner enters the proper moment of defrosting, and effectively eliminates and use outdoor coil temperature in the prior art
Judge limitation when frosting degree, reduce the defrosting number of air conditioner, promotes user experience.Below to above-mentioned steps make into
One step is described in detail.
In above-mentioned steps S110, any of means may be used to detect in the real-time current value of outdoor fan, indoor
The temperature of coil pipe can be obtained by indoor temperature transmitter, be no longer described in detail herein.
In above-mentioned steps S120, selected standard current value is standard current value of the outdoor fan under current rotating speed.
Specifically, since standard current value is the electric current of the outdoor fan that is measured in the state of outdoor unit non-frosting under different rotating speeds
Value, these standard current values have been previously written the control program of air conditioner, therefore in the real-time electricity for detecting outdoor fan
After flow valuve, directly the real-time current value detected can be compared with the standard current value under current rotating speed.It needs to illustrate
, selecting a kind of mode of standard current value can be：By detecting the rotating speed of outdoor fan, then existed according to current rotating speed
Standard current value identical with current rotating speed is selected in the standard current value to prestore.It in addition to this can also be rational according to other
Mode selectes standard current value.
In the present embodiment, the real-time current value of outdoor fan and the comparative approach of selected standard current value can be：
Calculate the ratio of the real-time current value and selected standard current value of outdoor fan.That is, being judged with the ratio of the two
The variation of the real-time current value of outdoor fan.
In above-mentioned steps S130, the temperature based on indoor coil judges whether that air conditioner is made to enter according to comparison result
The step of defrosting mode, specifically includes：If the temperature of indoor coil is less than the temperature threshold of setting, and outdoor fan is real-time
Current value and the ratio of selected standard current value are less than the first preset value, then so that air conditioner is entered defrosting mode；If outdoor
The ratio of the real-time current value of wind turbine and selected standard current value is not less than the temperature of the first preset value or indoor coil
Less than the temperature threshold of setting, then so that air conditioner is maintained current heating condition, do not enter defrosting mode.Wherein, this is first default
Value can be the arbitrary value between 0.85-0.95.
Further, defrosting control method of the invention further includes：After air conditioner enters defrosting mode, increase air conditioner
Throttle valve opening (throttle valve opening is increased to the step number of setting, such as 50 steps), using setting time (as an example,
The setting time can be the random time between 4-6 minutes) after, if the temperature of indoor coil is still less than the temperature threshold of setting
Value, and the ratio of the real-time current value of outdoor fan and selected standard current value then increases compression still less than the first preset value
The running frequency (as an example, the running frequency of compressor can be increased to original 1.2 times) of machine.
In order to illustrate more clearly of the defrosting control method of the present invention, come with reference to a specific embodiment detailed
Illustrate the defrosting control method of the present invention.
With reference to Fig. 2, Fig. 2 is the detail flowchart as the air conditioner defrosting control method of the exemplary present invention.Such as Fig. 2 institutes
Show, in the case of air conditioner is in heating condition, the real-time current value I of step S210, detection outdoor fan is first carried outsWith
The temperature T of indoor coil subsequently into step S220, judges whether the value of T is less than the temperature threshold (people in the art of setting
Member can be according to the suitable temperature threshold of actual use scene settings of air conditioner), and judge Is/IbValue whether be less than 0.9
(the first preset value), wherein IbFor selected standard current value, i.e. standard current value of the outdoor fan under current rotating speed.Such as
The temperature threshold of fruit T ＜ settings, and Is/Ib＜ 0.9 then enters step S230, air conditioner enters defrosting mode；Otherwise, then enter
Step S240, air conditioner is made to maintain current heating condition.
It should be noted that the first preset value among the above is illustrated using 0.9 as example, those skilled in the art
The arbitrary value that can also be set the first preset value between 0.85-0.95, or other arbitrary rational values, these do not take off
From protection scope of the present invention.
As an example, as shown in Fig. 2, in step S230, air conditioner enters defrosting mode, then by air conditioner
Throttle valve opening increases 50 steps.Operation after five minutes, judges the temperature T and I of indoor coil agains/IbValue, if T ＜ are set
Fixed temperature threshold, and Is/Ib＜ 0.9 then enters step S260, the running frequency of compressor is increased to original 1.2 times
(those skilled in the art can also carry out different degrees of increase according to actual application scenarios to the running frequency of compressor).
Otherwise, it enters step S270, air conditioner is made to maintain current defrosting mode.
The air conditioner defrosting control method of the present invention further includes the steps that exiting defrosting mode.For example, with continued reference to
Fig. 2 executes step S280, calculates I after air conditioner enters defrosting modes/IbValue, and judge the ratio whether be equal to 1.
If Is/Ib=1, illustrate that the current value of outdoor fan is equal with selected standard current value at this time, that is, illustrates on outdoor coil pipe used
Frost has been removed, and therefore, enters step S290, air conditioner exits defrosting mode.Otherwise, illustrate that the frost on outdoor coil pipe used does not have also
It is removed totally, air conditioner is made to maintain current defrosting mode." current defrosting mode " herein can be the throttling of air conditioner
Can also be before or after compressor operating frequency increases, that is to say, that as long as empty before or after valve opening increases 50 steps
Device is adjusted to enter defrosting mode, you can by judging Is/IbValue to determine whether exit defrosting mode, or maintain current defrosting
Pattern.
It will be readily appreciated by those skilled in the art that during defrosting, the current value of outdoor fan can gradually increase, when
When the real-time current value of outdoor fan gradually increases to equal with the standard current value selected, illustrate on outdoor coil pipe used frost
It is removed, and during atual detection, allow IsAnd IbBetween there are certain errors.As an example, outdoor fan
Real-time current value IsWith selected standard current value IbRatio be more than or equal to the second preset value when, then exit defrosting mode.Its
In, arbitrary value of second preset value between 0.95-1.For example, during defrosting, if the real-time electricity of outdoor fan
Flow valuve, which gradually increases to, meets Is/Ib>=0.95, you can judge that the frost on outdoor coil pipe used is eliminated substantially, can select to move back at this time
Go out defrosting mode.Those skilled in the art can require according to actual defrosting, reasonably set the second preset value.
In conclusion the present invention is simultaneously according to the temperature of indoor coil and the electric current of outdoor fan with outdoor coil pipe used knot
The variation of white degree and changed rule judge outdoor coil pipe used frosting degree.Due to the size of current meeting of outdoor fan
Corresponding variation occurs with outdoor coil pipe used frosting degree, and selected standard current value is in the state of outdoor unit non-frosting
The current value of the outdoor fan of measurement, can be accurate by comparing the real-time current value and selected standard current value of outdoor fan
Ground reflects the situation of change of the size of current of outdoor fan, while the temperature threshold further according to the temperature of indoor coil relative to setting
The variation of value can more accurately reflect outdoor coil pipe used frosting degree, to more accurately select defrosting opportunity, and effectively
Elimination judges limitation when frosting degree using outdoor coil temperature in the prior art, reduces the defrosting number of air conditioner,
Promote user experience.
So far, it has been combined preferred embodiment shown in the drawings and describes technical scheme of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific implementation modes.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make the relevant technologies feature equivalent change or replacement, these
Technical solution after change or replacement is fallen within protection scope of the present invention.
Claims (10)
1. a kind of air conditioner defrosting control method, which is characterized in that the defrosting control method includes the following steps：
In the case of air conditioner is in heating condition, the real-time current value of outdoor fan and the temperature of indoor coil are detected；
Compare the real-time current value of outdoor fan and selected standard current value；
Based on the temperature of the indoor coil, judged whether that air conditioner is made to enter defrosting mode according to comparison result；
Wherein, the standard current value is the electricity of the outdoor fan that is measured in the state of outdoor unit non-frosting under different rotating speeds
Flow valuve.
2. air conditioner defrosting control method according to claim 1, which is characterized in that the selected standard current value is
Standard current value of the outdoor fan under current rotating speed.
3. air conditioner defrosting control method according to claim 2, which is characterized in that " compare the real-time electricity of outdoor fan
The step of flow valuve and selected standard current value " includes：
Calculate the ratio of the real-time current value and selected standard current value of the outdoor fan.
4. air conditioner defrosting control method according to claim 3, which is characterized in that " the temperature based on the indoor coil
Degree, judged whether that air conditioner is made to enter defrosting mode according to comparison result " the step of include：
If the temperature of the indoor coil is less than the temperature threshold of setting, and the real-time current value of the outdoor fan with it is selected
Standard current value ratio be less than the first preset value, then so that the air conditioner is entered defrosting mode；Otherwise, make the air conditioner
Current heating condition is maintained, defrosting mode is not entered.
5. air conditioner defrosting control method according to claim 4, which is characterized in that the Defrost method further includes：
After the air conditioner enters defrosting mode, increase the throttle valve opening of air conditioner, after setting time, if
The temperature of the indoor coil is still less than the temperature threshold of setting, and the real-time current value of the outdoor fan and selected standard
The ratio of current value then increases the running frequency of compressor still less than the first preset value.
6. air conditioner defrosting control method according to claim 5, which is characterized in that first preset value is 0.85-
Arbitrary value between 0.95；And/or
The setting time is the random time value between 4-6 minutes；And/or
" throttle valve opening for increasing air conditioner " is specially：By the step number of throttle valve opening increase setting；And/or
" running frequency for increasing compressor " is specially：The running frequency of compressor is increased to original setting multiple.
7. air conditioner defrosting control method according to any one of claim 1 to 6, which is characterized in that the defrosting control
Method processed further includes the steps that judging whether to exit defrosting mode, which includes：
After the air conditioner enters defrosting mode, compare the real-time current value of indoor fan and selected standard current value；
Judged whether that air conditioner is made to exit defrosting mode according to comparison result.
8. air conditioner defrosting control method according to claim 7, which is characterized in that " enter defrosting in the air conditioner
After pattern, compare the real-time current value of indoor fan and selected standard current value " the step of include：
Calculate the ratio of the present current value and selected standard current value of the outdoor fan.
9. air conditioner defrosting control method according to claim 8, which is characterized in that " judged whether according to comparison result
So that air conditioner is exited defrosting mode " the step of include：
If the real-time current value of the outdoor fan and the ratio of selected standard current value are more than or equal to the second preset value,
Exit defrosting mode；Otherwise, the air conditioner is made to maintain defrosting operating condition.
10. air conditioner defrosting control method according to claim 9, which is characterized in that second preset value is 0.95-
Arbitrary value between 1.
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| CN201810152018.1A CN108361917A (en) | 2018-02-14 | 2018-02-14 | Air conditioner defrosting control method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094832A (en) * | 2019-05-16 | 2019-08-06 | 滁州星联电子有限公司 | A kind of work Defrost method of convertible frequency air-conditioner |
| CN110836477A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for fixed-frequency air conditioner |
| CN110836489A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN110836436A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN110836439A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| 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 |
| CN113587364A (en) * | 2020-04-30 | 2021-11-02 | 青岛海尔空调电子有限公司 | Defrosting control method for multi-split air conditioning unit |
| CN113847709A (en) * | 2021-11-01 | 2021-12-28 | 广东积微科技有限公司 | Outdoor unit defrosting control device and control method of air conditioner and air conditioner |
| CN114413413A (en) * | 2021-12-13 | 2022-04-29 | 珠海格力电器股份有限公司 | Air conditioner defrosting method and air conditioner |
| CN114738929A (en) * | 2022-04-01 | 2022-07-12 | 北京小米移动软件有限公司 | Air conditioner defrosting control method and device and storage medium |
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