CN109323373A - Air conditioner defrosting control method - Google Patents
Air conditioner defrosting control method Download PDFInfo
- Publication number
- CN109323373A CN109323373A CN201811209904.XA CN201811209904A CN109323373A CN 109323373 A CN109323373 A CN 109323373A CN 201811209904 A CN201811209904 A CN 201811209904A CN 109323373 A CN109323373 A CN 109323373A
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- CN
- China
- Prior art keywords
- defrosting
- air conditioner
- time
- preset time
- outdoor unit
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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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The present invention provides a kind of air conditioner defrosting control methods.It include: after receiving defrosting signal, to control the air conditioner and start to defrost, and detect outdoor environment temperature x；Defrosting time y is determined according to the outdoor environment temperature x；After reaching the defrosting time y, defrosting is exited.In air conditioner defrosting control method of the invention, defrosting time length is matched with outdoor unit frosting severity, i.e., the long point of defrosting time is distributed in frosting critical regions, and the short point of defrosting time is not distributed in critical regions for frosting, defrosting efficiency is improved, the not clean phenomenon that defrosts is avoided.Further, it is ensured that defrosting time is relatively long near 0 DEG C, improves defrosting efficiency, avoids the not clean phenomenon that defrosts.It can solve the problems, such as that the air-conditioner defrosting time is unmatched with operating condition, improve the defrosting efficiency under each operating condition.Because air-conditioning, under different operating conditions, outdoor unit frosting degree is different, it is therefore desirable to defrosting time be also different.
Description
Technical field
The present invention relates to air conditioner refrigeratings to heat field, more particularly to a kind of air conditioner defrosting control method.
Background technique
When air-conditioning winter heats, the temperature of condenser is low, and surface is easy frosting.Therefore, air-conditioning heating for a period of time
Afterwards, it needs to defrost to condenser.Under normal conditions, after air-conditioning receives and starts to defrost signal, four-way valve commutation, refrigerant
It is flowed to after condenser flows to evaporator again by compressor and returns to compressor, be similar to refrigeration mode, utilize the " high of press discharge
Temperature " gas coolant passes through condenser, to reach defrost, defrosting purpose.
Existing Defrost technology defrosting time length is to exit defrosting condition by following three to determine: condition 1, outdoor coil pipe used
Temperature Te continuous 60 seconds more than 5 DEG C or more；Condition 2, outdoor coil temperature Te continuous 20 seconds more than 10 DEG C or more；Condition 3, continuously
The Defrost operation time reaches 11 minutes.Any one for meeting above three condition, can exit defrosting.
However, it is found by the inventors that outdoor environment temperature is higher, outdoor unit is less susceptible to frosting.5.5 DEG C or more are nothing naturally
White area, near 0 DEG C, very close to air dew point temperature, so -2 DEG C~2 DEG C are the regions for being very easy to frosting, -2 DEG C with
Lower absolute humidity is very low, and water vapor in air content is few, so frosting starts to reduce again, outdoor environment temperature is lower, in air
Water vapour content is fewer (water is ice at this time), and -7 DEG C or less frostings are less prone to instead, reforms into few white area.
By current defrosting exit criteria, at a temperature of different outdoor environments, defrosting time length is as shown in table 1.
Defrosting time table at temperature outside 1 different chamber of table
| Outdoor temperature/DEG C | ~-7 | - 7~-2 | - 2~2 | 2~5.5 | 5.5~ |
| Defrosting time/min | 11~8.75 | 8.75~7.42 | 7.42~5.95 | 5.95~5.14 | Without defrosting |
From the data of table 1 it is found that when lower outdoor environment temperature, outdoor coil temperature rises then slower when defrosting, that is, removes
The white time is longer, and air themperature is very low at this time, and water vapor in air content is less, and frosting is simultaneously few, and defrosting time is not in fact
It is so long, cause the defrosting efficiency not high.But frosting critical regions are near 0 DEG C, defrosting time is relatively short at this time,
It will appear the sordid phenomenon of defrosting, the outer machine of such as existing frequently-used 1.5P has the unclean phenomenon of defrosting at 0 DEG C.
Summary of the invention
The present invention is directed to overcome at least one defect of existing air conditioner defrosting, a kind of air conditioner defrosting controlling party is provided
Method matches defrosting time length with outdoor unit frosting severity, improves defrosting efficiency, avoids the not clean phenomenon that defrosts.
For this purpose, the invention proposes a kind of air conditioner defrosting control methods comprising:
It after receiving defrosting signal, controls the air conditioner and starts to defrost, and detect outdoor environment temperature x；
Defrosting time y is determined according to the outdoor environment temperature x；
After reaching the defrosting time y, defrosting is exited.
Preferably, when determining the defrosting according to the relational expression between the defrosting time y and the outdoor environment temperature x
Between y；The relational expression isWherein, the unit of the defrosting time y is min, institute
The unit for stating outdoor environment temperature x is DEG C.
Preferably, institute is determined according to the heating operation duration of the wind speed of the outdoor unit of the air conditioner and the air conditioner
State defrosting signal.
Preferably, described true according to the wind speed of the outdoor unit of the air conditioner and the heating operation duration of the air conditioner
The fixed defrosting signal, specifically includes:
It is exited when defrosting starts heating or described when the air conditioner starts heating every time, in the air conditioner
When air conditioner opens heating for the first time, the wind speed of the outdoor unit is detected, or preset the wind speed of the outdoor unit, obtain the first wind
Speed；
The wind speed for detecting the outdoor unit obtains the second wind speed；
Difference between first wind speed and second wind speed is less than or equal to preset difference value, and when persistently presetting
When long, and when the heating operation duration of the air conditioner meets default heating duration, obtain the defrosting signal.
Preferably, the heating operation duration according to the blower electric current of the outdoor unit of the air conditioner and the air conditioner is true
The fixed defrosting signal.
Preferably, when the heating operation of the blower electric current according to the outdoor unit of the air conditioner and the air conditioner
It is long to determine the defrosting signal, it specifically includes:
It is exited when defrosting starts heating or described when the air conditioner starts heating every time, in the air conditioner
When air conditioner opens heating for the first time, the blower electric current of the outdoor unit is detected, or preset the blower electric current of the outdoor unit, obtained
First electric current；
The blower electric current for detecting the outdoor unit, obtains the second electric current；
Difference between first electric current and second electric current is less than or equal to preset difference value, and when persistently presetting
When long, and when the heating operation duration of the air conditioner meets default heating duration, obtain the defrosting signal.
Preferably, air conditioner defrosting control method further include:
When starting defrosting, the compressor of the air conditioner is made to shut down the first preset time, while the air conditioner
The blower of outdoor unit operates the second preset time according to pre-set velocity；It is pre- that first preset time is greater than or equal to described second
If the time；
After third preset time, change the flow direction of the four-way valve of the air conditioner；Second preset time is greater than or waits
In the third preset time；
After second preset time, the blower of the outdoor unit is closed；
After first preset time, the compressor is opened；
After 4th preset time, the compressor is closed；
After 5th preset time, defrosting is exited；And the defrosting time y is equal to first preset time, the described 4th
The sum of preset time and the 5th preset time.
Preferably, first preset time is 50s to 70s, and second preset time is 45s to 65s；The third
Preset time is 40s to 60s；
5th preset time is 50s to 70s.
Preferably, after first preset time, also make the electronic expansion valve opening maximum opening of the air conditioner；
After starting defrosting or after first preset time, the blower of the indoor unit of the air conditioner is closed.
Preferably, after first preset time, run the compressor with predeterminated frequency；
When starting defrosting, the blower of the outdoor unit is improved, so that the blower of the outdoor unit is transported according to pre-set velocity
Turn second preset time.
In air conditioner defrosting control method of the invention, defrosting time length has been matched with outdoor unit frosting severity
Come, i.e., the long point of defrosting time is distributed in frosting critical regions, and the short point of defrosting time is not distributed in critical regions for frosting, improves defrosting effect
Rate avoids the not clean phenomenon that defrosts.Further, it is ensured that defrosting time is relatively long near 0 DEG C, improves defrosting efficiency, keeps away
Exempt the not clean phenomenon of frost.It can solve the problems, such as that the air-conditioner defrosting time is unmatched with operating condition, improve the defrosting efficiency under each operating condition.Cause
Be air-conditioning under different operating conditions, outdoor unit frosting degree is different, it is therefore desirable to defrosting time be also different.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic flow chart of air conditioner defrosting control method according to an embodiment of the invention.
Specific embodiment
Fig. 1 is the schematic flow chart of air conditioner defrosting control method according to an embodiment of the invention.Such as Fig. 1 institute
Show, it may include following steps that the embodiment of the invention provides a kind of air conditioner defrosting control methods:
After receiving defrosting signal, control air conditioner starts to defrost, and detects outdoor environment temperature x.When air conditioner starts
When defrosting, multiple outdoor environment temperatures can be continuously obtained, determine that the average value of multiple outdoor environment temperatures is outdoor environment temperature
Spend x.
Defrosting time y is determined according to outdoor environment temperature x.That is, defrosting time length and outdoor unit frosting is tight
Weight degree matching is got up, i.e., the long point of defrosting time is distributed in frosting critical regions, and the short point of defrosting time is not distributed in critical regions for frosting,
Defrosting efficiency is improved, the not clean phenomenon that defrosts is avoided.
After reaching defrosting time y, defrosting is exited.After exiting defrosting, air conditioner can enter room according to inner setting program
Interior heating mode or other operating modes.
In some preferred embodiments of the invention, according to the relational expression between defrosting time y and outdoor environment temperature x
Determine defrosting time y；Relational expression isWherein, the unit of defrosting time y is min,
The unit of outdoor environment temperature x is DEG C.
In this embodiment, it should be noted that when 5.5 DEG C of x >, will not generally enter defrosting, but some are special
Situation may enter defrosting, therefore when 5.5 DEG C of x >, y=4min is set so as to exit defrosting, because after entering defrosting,
Defrosting must be exited.
When in some embodiments of the invention, according to the heating operation of the wind speed of outdoor unit of the air conditioner and air conditioner
It is long to determine defrosting signal.
Specifically, air velocity transducer can be placed in air-conditioner outdoor unit outlet grid maximum outlet air velocity location.
When air conditioner starts heating every time, exits when defrosting starts heating in air conditioner or opened for the first time in air conditioner
When opening heating, the wind speed of outdoor unit or the wind speed of default outdoor unit are detected, the first wind speed is obtained.First wind speed also is understood as
The wind speed of blower when not having any white on outdoor unit.
The wind speed for detecting outdoor unit, obtains the second wind speed.The time interval that can be 30 seconds according to the period detects wind speed, obtains
Second wind speed.
Difference between the first wind speed and the second wind speed is less than or equal to preset difference value, and when lasting preset duration, with
And when the heating operation duration of air conditioner meets default heating duration, obtain defrosting signal.
For inventor's discovery because as outdoor unit frosting increases, wind speed is ever-reduced.When wind speed is reduced to centainly
Degree then shows that the frost layer on outdoor unit is relatively thick, defrosts.In conjunction with default heating duration, can prevent wind speed by
In the wind speed incidental mutations phenomenon that the reasons such as vibration occur, maloperation can be prevented.Continue preset duration can for 1.5 to
3min, preferably 2min.Default heating duration can be 40min to 50min, preferably 45min.Air velocity transducer detection accuracy
Height is changed by wind speed before and after frosting, can be defrosted opportunity with accurate judgement, is improved user and is heated comfort.Certainly, outdoor unit changes
When hot device is covered with dust all over, the judgement of defrosting opportunity is nor affected on, because judging according to the wind speed difference before and after frosting.
It in some alternative embodiments of the invention, can be according to the blower electric current and air conditioner of outdoor unit of the air conditioner
Heating operation duration determine defrosting signal.
For example, being exited when defrosting starts heating or in air conditioner when air conditioner starts heating every time, in air conditioner
When opening heating for the first time, the blower electric current of outdoor unit or the blower electric current of default outdoor unit are detected, the first electric current is obtained.
The blower electric current for detecting outdoor unit, obtains the second electric current.
Difference between the first electric current and the second electric current is less than or equal to preset difference value, and when lasting preset duration, with
And when the heating operation duration of air conditioner meets default heating duration, obtain defrosting signal.
In some embodiments of the invention, when starting defrosting, the compressor of air conditioner is made to shut down first default
Time, while the blower of outdoor unit of the air conditioner operates the second preset time according to pre-set velocity；First preset time be greater than or
Equal to the second preset time.When starting defrosting, the blower of outdoor unit can be improved, so that the blower of outdoor unit is according to pre-set velocity
Operate the second preset time.It could also say that, so that the blower of outdoor unit is run at high speed the second preset time, to unload refrigeration system
Pressure.
After third preset time, change the flow direction of the four-way valve of air conditioner.It is pre- that second preset time is greater than or equal to third
If the time.After second preset time, the blower of outdoor unit is closed.After first preset time, compressor is opened.
After 4th preset time, close compressor.After 5th preset time, defrosting is exited；Switchback heating mode.And it defrosts
Time y is equal to the sum of the first preset time, the 4th preset time and the 5th preset time.Effective defrosting time can be default for the 4th
Time.
First preset time is 50s to 70s, preferably 60s.Second preset time is 45s to 65s, preferably 55s.The
Three preset times are 40s to 60s, preferably 50s.5th preset time is 50s to 70s, preferably 60s.When first is default
Between after, make the electronic expansion valve opening maximum opening of air conditioner, also to reduce the refrigeration mode used when defrosting as much as possible
Influence to room temperature.After starting defrosting or after the first preset time, the blower of the indoor unit of air conditioner is closed, with to the greatest extent
Influence of the refrigeration mode used when possibly reducing defrosting to room temperature.After the first preset time, make compressor with pre-
If frequency is run.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of air conditioner defrosting control method characterized by comprising
It after receiving defrosting signal, controls the air conditioner and starts to defrost, and detect outdoor environment temperature x；
Defrosting time y is determined according to the outdoor environment temperature x；
After reaching the defrosting time y, defrosting is exited.
2. air conditioner defrosting control method according to claim 1, which is characterized in that
The defrosting time y is determined according to the relational expression between the defrosting time y and the outdoor environment temperature x；The pass
It is that formula isWherein, the unit of the defrosting time y is min, the outdoor environment
The unit of temperature x is DEG C.
3. air conditioner defrosting control method according to claim 1, which is characterized in that
The defrosting signal is determined according to the heating operation duration of the wind speed of the outdoor unit of the air conditioner and the air conditioner.
4. air conditioner defrosting control method according to claim 3, which is characterized in that the room according to the air conditioner
The heating operation duration of the wind speed of outer machine and the air conditioner determines the defrosting signal, specifically includes:
It is exited when defrosting starts heating or in the air-conditioning when the air conditioner starts heating every time, in the air conditioner
When device opens heating for the first time, the wind speed of the outdoor unit is detected, or preset the wind speed of the outdoor unit, obtain the first wind speed；
The wind speed for detecting the outdoor unit obtains the second wind speed；
Difference between first wind speed and second wind speed is less than or equal to preset difference value, and continues preset duration
When, and when the heating operation duration of the air conditioner meets default heating duration, obtain the defrosting signal.
5. air conditioner defrosting control method according to claim 1, which is characterized in that
The defrosting is determined according to the heating operation duration of the blower electric current of the outdoor unit of the air conditioner and the air conditioner
Signal.
6. air conditioner defrosting control method according to claim 5, which is characterized in that the room according to the air conditioner
The blower electric current of outer machine and the heating operation duration of the air conditioner determine the defrosting signal, specifically include:
It is exited when defrosting starts heating or in the air-conditioning when the air conditioner starts heating every time, in the air conditioner
When device opens heating for the first time, the blower electric current of the outdoor unit is detected, or preset the blower electric current of the outdoor unit, obtain first
Electric current；
The blower electric current for detecting the outdoor unit, obtains the second electric current；
Difference between first electric current and second electric current is less than or equal to preset difference value, and continues preset duration
When, and when the heating operation duration of the air conditioner meets default heating duration, obtain the defrosting signal.
7. air conditioner defrosting control method according to claim 1, which is characterized in that further include:
When starting defrosting, the compressor of the air conditioner is made to shut down the first preset time, while the outdoor of the air conditioner
The blower of machine operates the second preset time according to pre-set velocity；When first preset time is default more than or equal to described second
Between；
After third preset time, change the flow direction of the four-way valve of the air conditioner；Second preset time is greater than or equal to institute
State third preset time；
After second preset time, the blower of the outdoor unit is closed；
After first preset time, the compressor is opened；
After 4th preset time, the compressor is closed；
After 5th preset time, defrosting is exited；And the defrosting time y is preset equal to first preset time, the described 4th
The sum of time and the 5th preset time.
8. air conditioner defrosting control method according to claim 8, which is characterized in that
First preset time is 50s to 70s, and second preset time is 45s to 65s；The third preset time is
40s to 60s；
5th preset time is 50s to 70s.
9. air conditioner defrosting control method according to claim 7, which is characterized in that
After first preset time, also make the electronic expansion valve opening maximum opening of the air conditioner；
After starting defrosting or after first preset time, the blower of the indoor unit of the air conditioner is closed.
10. air conditioner defrosting control method according to claim 8, which is characterized in that
After first preset time, run the compressor with predeterminated frequency；
When starting defrosting, the blower of the outdoor unit is improved, so that the blower of the outdoor unit operates institute according to pre-set velocity
State the second preset time.
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| CN201811209904.XA CN109323373A (en) | 2018-10-17 | 2018-10-17 | Air conditioner defrosting control method |
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| CN111412582A (en) * | 2020-03-24 | 2020-07-14 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and system and air conditioner |
| CN112128924A (en) * | 2020-08-27 | 2020-12-25 | 青岛海尔空调器有限总公司 | Defrosting control method for outdoor unit of air conditioner and air conditioner |
| CN112303816A (en) * | 2020-09-29 | 2021-02-02 | 东风汽车集团有限公司 | Outdoor heat exchanger frosting recognition method and defrosting control method |
| 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 |
| CN113865008A (en) * | 2020-06-30 | 2021-12-31 | 广东美的制冷设备有限公司 | Defrosting control method and device, air conditioner and storage medium |
| EP3872409A4 (en) * | 2019-06-06 | 2022-03-09 | Qingdao Haier Air-Conditioning Electronic Co., Ltd | Method and apparatus for implementing defrosting, and air conditioner outdoor unit |
| CN114608145A (en) * | 2022-02-24 | 2022-06-10 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner, air conditioner and storage medium |
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| CN113865008A (en) * | 2020-06-30 | 2021-12-31 | 广东美的制冷设备有限公司 | Defrosting control method and device, air conditioner and storage medium |
| CN112128924A (en) * | 2020-08-27 | 2020-12-25 | 青岛海尔空调器有限总公司 | Defrosting control method for outdoor unit of air conditioner and air conditioner |
| CN112303816A (en) * | 2020-09-29 | 2021-02-02 | 东风汽车集团有限公司 | Outdoor heat exchanger frosting recognition method and defrosting control method |
| CN112303816B (en) * | 2020-09-29 | 2021-12-14 | 东风汽车集团有限公司 | Outdoor heat exchanger frosting recognition method and defrosting control method |
| 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 |
| CN114608145A (en) * | 2022-02-24 | 2022-06-10 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner, air conditioner and storage medium |
| CN114608145B (en) * | 2022-02-24 | 2024-02-20 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner, air conditioner and storage medium |
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